ACC Cell Lines and Drug-Screening Models

Preclinical and Translational Models

ACC cell lines and drug-screening models are preclinical systems used to study adrenocortical carcinoma biology, adrenal steroidogenesis, and candidate therapeutic vulnerabilities. Within ACC research, they occupy an intermediate position between molecular characterization of patient tumors and more complex in vivo or patient-derived platforms. The field has relied heavily on the NCI-H295 lineage, particularly H295R, because these cells retain broad steroidogenic machinery and responsiveness to several adrenal regulatory inputs, whereas other commonly used models such as HAC15 and SW-13 capture narrower or biologically distinct aspects of the disease.¹²³

These models are used partly because ACC is rare and clinically heterogeneous, making large mechanistic studies in patients difficult. Cell culture systems permit controlled testing of signaling pathways, hormone production, proliferation, apoptosis, invasion, resistance mechanisms, and drug combinations. However, the evidence base is dominated by in vitro experiments in a small number of long-passaged lines, and findings may vary substantially by substrain, passage history, culture medium, serum or albumin exposure, and whether experiments use 2D or 3D conditions.⁴⁵⁶

No available cell line reproduces the full clinical, histologic, and molecular diversity of ACC. H295-derived systems are generally the most informative for endocrine and steroidogenic questions, while SW-13 is often used for growth, migration, and cytotoxicity assays despite persistent uncertainty about how faithfully it represents steroidogenic ACC.⁷⁸⁹ As a result, most drug-screening results from these models remain hypothesis-generating rather than practice-defining, and confidence is greatest when signals recur across multiple models and are supported by xenografts, patient-derived cultures, spheroids, or organoid-like systems.¹⁰¹¹¹²

Model landscape and biologic context

The main human ACC-related cell platforms include the H295/NCI-H295/H295R family, HAC15, SW-13, and a smaller number of newer patient-derived lines. H295-derived models express many canonical adrenal steroidogenic enzymes and respond to cAMP-linked stimuli, angiotensin II, potassium, endothelin, and related regulators, making them useful for integrated studies of cortisol, aldosterone, and androgen biosynthesis.¹³¹⁴¹⁵⁷ HAC15 extends this steroidogenic framework and has been particularly useful for aldosterone-focused signaling questions, including angiotensin-pathway, calcium-signaling, and ion-channel studies.¹⁶¹⁷¹⁸

By contrast, SW-13 is weakly steroidogenic and is often used as a model of proliferation, apoptosis, migration, and stress signaling rather than of adrenal endocrine physiology.⁸ Genomic comparisons suggest that H295R and SW-13 resemble different aggressive ACC subsets rather than interchangeable versions of the same disease model.⁹ This distinction is reasonably well supported and has direct practical implications: endocrine and steroid-enzyme questions are more reliably addressed in H295-derived systems, whereas some structural, motility, and cytotoxicity phenotypes may be more tractable in SW-13.

Several widely used lines also have atypical features that narrow generalizability. In particular, SW-13 has unusual nuclear-envelope, intermediate-filament, and chromatin-remodeling characteristics that may influence transcriptional and structural experiments independently of ACC-relevant biology.¹⁹²⁰²¹ These caveats are important because a positive result in a single line may reflect model-specific biology rather than a broader ACC dependency.

Major experimental phenotypes

Steroidogenesis and adrenal signaling

H295R-based systems are the most established ACC-derived models for adrenal steroidogenesis. Across many studies, they reproduce key regulatory relationships involving cAMP/PKA, calcium, PKC, angiotensin II, endothelin, natriuretic peptides, VIP/PACAP, cholesterol uptake, and mitochondrial steroidogenic control.²²²³²⁴²⁵²⁶ This makes them relatively reliable for pathway dissection within human adrenal endocrine biology, although they remain imperfect approximations of primary adrenal tissue and do not capture all aspects of zonation, ion-channel physiology, or normal adrenal context.²⁷²⁸

A large part of the H295R literature comes from endocrine toxicology rather than tumor-directed therapy research. In this setting, H295R functions as a human steroidogenesis assay for hormone-output profiling, enzyme perturbation studies, and increasingly for high-throughput and computational modeling of pathway disruption.²⁹³⁰³¹³²³³ That body of work is reliable for identifying how chemicals alter adrenal steroid flux, but its ACC relevance is often indirect; practical therapeutic inferences for carcinoma should therefore be made cautiously.

HAC15 adds complementary value, especially for aldosterone-regulatory signaling, calcium handling, and mutation-based adrenal electrophysiology questions.³⁴³⁵³⁶ These studies help refine adrenal signaling architecture, but many are more informative for adrenal physiology and hyperaldosteronism biology than for validated ACC treatment targets. The practical implication is that steroidogenic findings may illuminate tumor biology, yet they do not automatically identify druggable carcinoma dependencies.

Proliferation, invasion, and stress phenotypes

To study tumor behavior beyond hormone synthesis, investigators have used H295R, SW-13, and newer patient-derived models to examine proliferation, apoptosis, migration, extracellular-matrix interactions, stem-like states, and microenvironmental crosstalk. Recurrent themes include IGF signaling, Wnt/β-catenin dependence, MAPK activation, peptide growth loops, ER-stress responses, and adipose- or matrix-associated modulation of motility and survival.³⁷³⁸³⁹⁴⁰⁴¹

This literature is useful for target nomination, but it is less stable than the steroidogenesis literature because invasive and stem-like behaviors are highly assay-dependent and often measured in simplified culture systems. Findings on epithelial-mesenchymal transition, resistant subpopulations, metastatic behavior, or matrix-driven phenotypes therefore remain provisional and may not generalize across models or to patient tumors.⁴²⁴³⁴⁴ Clinically, these data are best interpreted as mechanistic clues that require confirmation in more complex systems.

The contrast between endocrine fidelity and tumor-behavior fidelity helps explain why the same line may be highly informative for one task and weak for another. H295R is often strong for steroidogenic mechanism but not necessarily for invasion modeling, whereas SW-13 may be experimentally convenient for migration and cytotoxicity while remaining a limited proxy for steroid-producing ACC.⁸²

Drug screening and therapeutic hypothesis generation

ACC cell lines are widely used to prioritize candidate therapies before animal testing. Recurrently implicated pathways include IGF signaling, PI3K/mTOR, Wnt/β-catenin, HSP90, aurora kinases, CDK programs, FGFR signaling, ferroptosis-related redox control, ER-stress pathways, and glutamine metabolism.⁴⁵⁴⁶⁴⁷³⁹⁴⁸⁴⁹⁵⁰⁵¹⁵² A variety of repurposed or exploratory agents, including metformin, temozolomide, abiraterone, progesterone, trabectedin, cabazitaxel, melatonin, and niclosamide, have also shown activity in at least some models.⁵³⁵⁴⁵⁵⁵⁶⁵⁷⁵⁸⁵⁹⁶⁰

What is most reliable in this literature is identification of pathway dependence within a given model and generation of rational combination hypotheses. What is less reliable is prediction of clinical benefit, superiority over standard treatments, or optimal sequencing relative to surgery, mitotane-based therapy, cytotoxic regimens, or newer systemic strategies. Discordance across models is common, including between H295R and SW-13 and between standard lines and more resistant models such as MUC-1 or patient-derived cultures.⁶¹⁶²⁶³

These limitations make comparative framing essential. Relative to established clinical management, cell-line screening mainly serves to prioritize mechanisms for further testing rather than to support treatment selection in patients. Findings gain translational weight when they are reproduced in xenografts, primary cultures, or 3D systems and when they align with molecular features seen in patient tumors.¹⁰⁶⁴⁶⁵

Resistance and methodological pitfalls

A major use of ACC cell models is resistance research, particularly for mitotane, platinum agents, anthracyclines, radiation, and combination regimens. Proposed resistance mechanisms include mitochondrial remodeling, lipid and cholesterol handling, P-glycoprotein-mediated efflux, altered redox balance, ER-stress adaptation, and persistence of invasive or stem-like cell states.⁶⁶⁶⁷⁶⁸⁶⁹⁷⁰ Combination studies likewise suggest that mitotane may sensitize cells to selected cytotoxic, targeted, or radiation-based approaches, although synergy is inconsistent and may become antagonism depending on the model and exposure conditions.⁷¹⁷²⁷³⁷⁴⁷⁵

Methodological confounding is one of the more robust conclusions in this literature. Apparent mitotane activity is strongly influenced by albumin and serum binding, and H295-derived substrains differ meaningfully in steroid output and treatment response.⁴⁶⁵ The practical implication is that reported potency, resistance, or drug synergy may not reproduce across laboratories without close standardization of culture conditions.

Emerging platforms and role in ACC research

To address limitations of classic monolayer culture, recent work has expanded to patient-derived lines, matched xenograft-linked cultures, spheroids, hydrogels, mixed-cell adrenoid systems, and organoid-oriented platforms.³⁷⁶⁷⁷⁷⁸⁷⁹¹² These systems may preserve more architecture, matrix interaction, and treatment resistance than standard 2D cultures, and they often show lower apparent drug sensitivity, suggesting that conventional monolayer assays may overestimate therapeutic activity.⁶²⁷⁷⁷⁹

These newer models are promising but remain incompletely standardized and are not yet replacements for established cell lines. Their most reliable current role is complementary: conventional lines such as H295R and HAC15 remain accessible for mechanistic studies and higher-throughput screening, while 3D and patient-derived systems may improve biologic fidelity and translational prioritization.⁵¹¹¹² In current ACC research, cell lines therefore function less as stand-alone surrogates of the disease than as one layer of a broader preclinical toolkit whose findings generally require cross-model validation before clinical translation.

Included Articles

PMID 218206: A 1979 biochemical study isolated a distinct cAMP-binding, autophosphorylating protein kinase, AUT-PK 85, from adrenocortical carcinoma tissue and found it differed from normal adrenal cAMP-dependent kinase regulatory subunits in size, substrate behavior, and lack of histone phosphorylation.⁸⁰

PMID 2095367: Using the ACC cell line SW13 as a bioassay and source material, this study partially purified a novel epithelial transforming growth factor that promoted anchorage-independent SW13 growth, supporting an autocrine growth mechanism. The factor showed biochemical properties distinct from basic fibroblast growth factor, including lack of heparin binding and no endothelial mitogenic activity.⁸¹

PMID 2590222: In the SW13 human adrenocortical carcinoma cell line, low micromolar mevinolin stimulated anchorage-independent colony growth, while higher doses inhibited growth. The effect was reversed by mevalonate but not by dolichol or LDL, implicating mevalonate-pathway metabolites in regulation of ACC cell proliferation in this preclinical model.⁸²

PMID 479738: An in vitro comparison of two ACC specimens showed preserved 11β-hydroxylase activity but marked inhibition of 11β-hydroxylase and 18-hydroxylase pathways by o,p’-DDD, aminoglutethimide, and SKF 12185. The treated child’s tumor remained clinically hypercortisolemic despite in vitro drug sensitivity, suggesting discordance between tumor biology and in vivo drug exposure.⁸³

PMID 2777898: Using the human adrenocortical carcinoma cell line SW-13, this study found dose-dependent heparin-mediated growth inhibition in monolayer and soft agar, with partial reversal by TGF-epsilon, basic FGF, and acidic FGF but not by EGF or IGF-I. The findings highlight extracellular matrix and growth-factor interactions as modulators of ACC cell proliferation in vitro.⁸⁴

PMID 2840274: In the human ACC cell line SW-13, direct adenylate cyclase stimulation increased cAMP without increasing steroid output, while DHEA-S release rose with angiotensin II, catecholamines, alpha-MSH, protein kinase C activation, and calcium ionophore exposure. These findings suggest uncoupling between cAMP signaling and steroidogenesis and support SW-13 as a model for adrenal steroidogenic pathway studies.⁸⁵

PMID 4328841: In a transplanted rat corticosterone-producing adrenocortical carcinoma, adenylate cyclase responded to multiple hormones beyond ACTH, including catecholamines, TSH, LH, and FSH, unlike normal adrenal tissue. Pharmacologic and subunit experiments suggested distinct ectopic receptor specificities converging on a common cyclase signaling unit.⁸⁶

PMID 4348128: Using isolated rat adrenocortical carcinoma 494 cells, this study found abnormal hormonal regulation of steroidogenesis: ACTH and cyclic AMP failed to stimulate corticosterone synthesis and instead inhibited specific steps in conversion from pregnenolone or progesterone toward corticosterone.⁸⁷

PMID 4718783: Using isolated rat adrenocortical carcinoma cells, this preclinical study found preserved conversion of 20-hydroxycholesterol to deoxycorticosterone and corticosterone despite absent ACTH stimulation. The findings suggest intact cholesterol side-chain cleavage with a possible downstream signaling defect, potentially involving cAMP-responsive protein kinase activity.⁸⁸

PMID 6860701: In rat adrenocortical carcinoma cells and adrenal mitochondria, halogenated side-chain cholesterol analogues were taken up and converted to pregnenolone, with brominated sterols also suppressing de novo sterol biosynthesis. These findings support their use as experimental probes of sterol transport and steroidogenic metabolism in adrenocortical tumor models.⁸⁹

PMID 6951198: Using the Y1 mouse adrenocortical tumor cell line, this study shows that amplified DNA sequences are associated with double minutes and localize to homogeneously staining regions, supporting a structural relationship between these chromosomal anomalies and gene amplification in adrenal tumor cells.⁹⁰

PMID 8187950: Using mouse Y-1 and human NCI-H295 adrenocortical carcinoma cell lines, this study found that ACTH receptor mRNA is upregulated by ACTH and cAMP-pathway activation, with angiotensin II also increasing receptor transcripts in H295 cells. The work supports H295 as a translational model for adrenal signaling and receptor regulation.⁹¹

PMID 8194473: Using the human ACC H295 cell line, this study shows that AT1 angiotensin II receptor expression is regulated by distinct signaling pathways: cAMP/PKA activation markedly lowers AT1 receptor mRNA, ligand binding, and downstream phosphoinositidase-C signaling, whereas angiotensin II mainly reduces mRNA with limited effect on receptor binding.⁹²

PMID 8387159: This study characterizes the human ACC cell line NCI-H295 as a steroidogenic model expressing multiple adrenal enzyme transcripts, including P450scc, P450c17, P450c21, P450c11B1, and P450c11B2. cAMP predominantly increased these genes at the transcriptional level, supporting NCI-H295 as a translational system for studying human adrenal steroidogenesis.¹³

PMID 8396576: This study supports the NCI-H295 human adrenocortical carcinoma cell line as a hormonally responsive preclinical model of adrenal steroidogenesis. ACTH, forskolin, and dibutyryl cAMP increased cortisol and C19 steroid production and upregulated P450c17 activity and mRNA, with cortisol as the predominant product.⁹³

PMID 8404594: This study identifies the human ACC-derived NCI-H295 cell line as an angiotensin II-responsive model of aldosterone secretion. Aldosterone production was mediated through AT1 receptor signaling with phosphoinositide turnover, increased intracellular calcium, and induction of aldosterone synthase mRNA.¹⁴

PMID 8593542: This study found DAX-1 expression in the adrenocortical carcinoma cell line NCI-H295, alongside hypothalamic, pituitary, adrenal, and gonadal tissues. It supports NCI-H295 as a steroidogenic cellular model for investigating DAX-1 regulation and fetal adrenal steroidogenesis relevant to ACC biology.⁹⁴

PMID 8597483: This article describes the NCI-H295 cell line, derived from an invasive primary adrenocortical carcinoma with mineralocorticoid, glucocorticoid, and androgen excess, as a human ACC model that retains broad steroidogenic capacity and hormonal responsiveness. The study shows regulated production of DHEA, DHEAS, cortisol, and aldosterone alongside modulation of P450c17-related steroidogenic pathways.⁷

PMID 8663337: This study shows that the ACC cell line NCI-H295 expresses lipoprotein lipase mRNA and protein, with membrane localization and heparin-releasable activity. LPL expression was modulated by cAMP/PKA and PKC signaling, supporting use of NCI-H295 to study adrenal lipid metabolism and steroidogenesis-related regulatory pathways.⁹⁵

PMID 8735599: This study characterizes the H295R adrenocortical carcinoma cell line as a functional human model of aldosterone regulation, showing NPRA receptor expression, cGMP signaling, and dose-dependent inhibition of angiotensin II-stimulated aldosterone production by natriuretic peptides.²²

PMID 8824897: Using the H295R human adrenocortical carcinoma cell line, this study shows that angiotensin II, potassium, calcium channel activation, and cAMP signaling induce StAR protein expression, while aldosterone output tracks mainly with cAMP- and calcium-dependent stimulation. The findings support H295R as a translational model for acute adrenal steroidogenesis signaling.¹⁵

PMID 8964847: Using the ACC-derived H295R cell line, this study shows differential regulation of steroidogenic enzymes by angiotensin II and forskolin, with AT1 receptor and protein kinase C signaling attenuating forskolin-induced P450c17 and P450scc while enhancing 3beta-HSD-related effects. The findings support H295R as a translational model for ACC steroidogenesis and signaling biology.²³

PMID 8969931: In the steroid-secreting NCI-H295 adrenocortical carcinoma cell line, paclitaxel produced time- and dose-dependent growth inhibition, increased apoptotic DNA fragmentation, and reduced secretion of aldosterone, cortisol, testosterone, and DHEA-S. The study illustrates use of this ACC model to evaluate cytotoxic and steroidogenic effects of candidate therapies.⁹⁶

PMID 9002987: This study uses the human H295R adrenocortical carcinoma cell line as a functional steroidogenic model, showing direct PACAP-, PACAP27-, and VIP-stimulated aldosterone secretion with cAMP signaling but no PLC activation. The findings support cell type-specific receptor biology in H295R and illustrate the model’s utility for mechanistic endocrine studies.⁹⁷

PMID 9322959: Using the human ACC cell line NCI-H295, this study showed endogenous endothelin-1 production, expression of ETA and ETB receptors, and aldosterone synthase transcripts, with endothelin-1 increasing aldosterone synthase expression and intracellular calcium signaling. The findings support NCI-H295 as a translational model for human adrenocortical steroidogenic regulation.⁹⁸

PMID 9488231: Using the human ACC cell line NCI H295, this study showed that vasoactive intestinal polypeptide directly stimulates cortisol secretion with parallel cAMP increases, supporting an adenylate cyclase-coupled VIP receptor mechanism. The work highlights H295 as a useful steroidogenic model for dissecting direct adrenocortical signaling without medullary cell contamination.⁹⁹

PMID 9551244: An in vitro study in the steroid-secreting NCI-H295 ACC cell line found that paclitaxel caused dose- and time-dependent growth inhibition, irreversible loss of proliferation, apoptosis with DNA fragmentation, and reduced aldosterone, cortisol, and testosterone secretion. The findings suggest exploratory therapeutic potential while remaining limited to a preclinical model.¹⁰⁰

PMID 9795339: Using the NCI-h295 adrenocortical carcinoma cell line, this study shows that aminoglutethimide and metyrapone suppress steroid secretion and downregulate ACTH receptor mRNA with reduced ACTH-stimulated cAMP signaling. Forskolin or cortisol reversed the receptor-suppressive effect, supporting NCI-h295 as a functional model for steroidogenic and ACTH signaling studies in ACC.¹⁰¹

PMID 9854186: Using human H295-R and murine Y1 adrenocortical tumor cell lines, this study shows that MVDP, an aldo-keto reductase family protein, is constitutively expressed and upregulated by cAMP or forskolin through a direct protein kinase A–linked mechanism. The work highlights these ACC-related cell models for studying adrenal signaling biology rather than clinical management.¹⁰²

PMID 9863019: In the SW13 adrenocortical carcinoma cell line, mitotane enhanced anthracycline cytotoxicity and modestly increased cisplatin activity, while lonidamine slightly increased epirubicin and cisplatin effects and produced a supra-additive effect in a three-drug combination. The study provides preclinical rationale for combination therapy strategies in ACC.¹⁰³

PMID 9864057: Using the ACC-derived NCI-H295 cell line, this study found expression of VIP1 and VIP2 receptors but not VIP itself. VIP dose-dependently increased aldosterone, cortisol, and DHEA secretion and augmented ACTH-stimulated aldosterone and cortisol release without affecting cell proliferation.¹⁰⁴

PMID 9880077: A 1998 translational study found adrenomedullin mRNA expression in most sampled adrenocortical carcinomas and in the SW-13 adrenocortical carcinoma cell line, with peptide detected in culture medium but not retained intracellularly. The findings suggest rapid secretion by ACC cells and support SW-13 as a model for studying ACC peptide production and tumor biology.¹⁰⁵

PMID 10202857: Using the ACC-derived NCI-H295 cell line, this preclinical study showed that YM116 preferentially inhibits CYP17 C17-20 lyase, markedly reducing androstenedione and dehydroepiandrosterone production more potently and selectively than ketoconazole while also affecting cortisol synthesis at higher concentrations.¹⁰⁶

PMID 10215860: Using the human ACC cell line NCI-H295, this study shows coordinated cAMP-induced upregulation of SR-BI and LDL receptor expression, while cholesterol uptake remains quantitatively greater from LDL than HDL. The findings support NCI-H295 as a translational model for human adrenal steroidogenic cholesterol handling.¹⁰⁷

PMID 10333078: A small translational study found long-form leptin receptor expression in adrenocortical carcinomas, adenomas, and the ACC cell line NCI-H295, with weaker staining in pheochromocytoma. Despite receptor expression, leptin did not increase NCI-H295 viability or proliferation, arguing against a direct mitogenic role in ACC cells.¹⁰⁸

PMID 10425444: This study supports the NCI H295R human ACC cell line as a translational model for adrenocortical tumor biology, showing serum-free proliferation, broad steroidogenic activity, high IGF-II secretion, IGFBP-2 production, and type 1 and type 2 IGF receptor expression. Antibody-mediated inhibition of proliferation implicates an autocrine IGF-II and type 1 IGF receptor growth loop.³⁷

PMID 10764953: In the SW-13 adrenocortical carcinoma cell line, adrenomedullin and endothelin-1 were produced and secreted, while several other neuropeptides were not detected. Cytokines differentially increased peptide secretion and related mRNA expression, whereas ACTH, angiotensin II, and dexamethasone showed no significant effect in this model.¹⁰⁹

PMID 10965887: This study established an H295R human ACC xenograft in nude mice with a 90% take rate, stable serial growth, histologic similarity to the source carcinoma, preserved IGF-II and IGFBP-2 dysregulation, and secretion of steroids and IGFBP-2 that may serve as tumor markers in drug testing.¹¹⁰

PMID 11168692: This report describes establishment of the human ACC cell line ACT-1 from a vena cava tumor thrombus, with rapid in vitro growth, complex aneuploid karyotypic abnormalities, and retained adrenal-lineage features including 3β-HSD type II expression and ultrastructural steroidogenic characteristics.¹¹¹

PMID 11196471: Using the Y1 adrenocortical tumor cell line, this study models epigenetic silencing of the steroidogenic c21 gene and suggests that DNA methylation and Ras-linked DNMT1 activity help maintain inactive chromatin, while histone deacetylase inhibition alone does not restore expression.¹¹²

PMID 11357057: Using the ACC-derived H295R cell line, this study showed that src kinase inhibition with PP2 suppresses basal and stimulated aldosterone production without reducing viability. The findings support H295R as a translational model for adrenal steroidogenesis and suggest src signaling influences zone-specific steroid enzyme regulation, including CYP17 expression.¹¹³

PMID 11445248: In the SW-13 adrenocortical carcinoma cell line, urotensin II and its receptor mRNAs were detected, and SW-13 uniquely secreted measurable urotensin II-like immunoreactivity among several tumor cell lines tested. Chromatography suggested secretion of multiple, partly processed higher-molecular-weight urotensin II-related forms, supporting a possible autocrine or paracrine signaling model in this ACC cell system.¹¹⁴

PMID 11564720: Using the human ACC cell line NCI H295R alongside bovine glomerulosa cells, this study shows that angiotensin II increases SR-BI mRNA and protein, enhances selective HDL cholesterol ester uptake, and augments steroidogenic output, supporting H295R as a translational model of adrenal steroidogenic regulation.²⁴

PMID 11869873: This study evaluates the H295R human adrenocortical carcinoma cell line as a translational model for human glucocorticoid steroidogenesis, showing measurable apparent CYP11A, CYP17, CYP21, and CYP11B1 activities and differential inhibition by ketoconazole, metyrapone, aminoglutethimide, and 3-MeSO2-DDE.¹¹⁵

PMID 12193050: Using the SW-13 adrenocortical carcinoma cell line, this study reports endothelin-1 mRNA expression and measurable immunoreactive endothelin secretion in vitro. The work situates ACC within broader tumor-cell peptide signaling research but does not test ACC-specific proliferation or treatment effects.¹¹⁶

PMID 12457630: This in vitro study evaluated gossypol and apogossypol hexaacetate in two adrenocortical carcinoma cell lines, steroid-producing NCI-H295R and non-steroid-secreting SW-13, showing dose-dependent growth inhibition after 72 hours with micromolar IC50 values. The findings suggest preclinical antiproliferative activity but do not establish clinical efficacy in ACC.¹¹⁷

PMID 12668173: Using the human ACC cell line NCI-H295R as a steroidogenic model, this study shows that angiotensin II and PMA upregulate SR-BI expression, increase aldosterone production, and enhance cholesteryl ester uptake from HDL and LDL. The findings support this cell line as a translational platform for studying cholesterol handling linked to adrenal steroidogenesis.²⁵

PMID 12668216: This preclinical study found urotensin II and its receptor expressed in ACC tissues and showed that exogenous urotensin II increased proliferation of the SW-13 adrenocortical carcinoma cell line, supporting a possible autocrine or paracrine growth-promoting role in adrenal tumors.¹¹⁸

PMID 15171718: Using the NCI-H295R adrenocortical carcinoma cell line, this study shows that VIP directly stimulates cortisol secretion through cAMP signaling mediated predominantly by VPAC1 rather than VPAC2 receptors. PACAP also stimulated cortisol output, supporting the model’s utility for mechanistic studies of adrenal steroidogenic signaling.¹¹⁹

PMID 15187238: This article describes the H295R adrenocortical carcinoma cell line as a steroidogenic model that retains expression of key adrenal enzymes and can be used for multiplex real-time PCR assessment of ten steroidogenesis-related genes after chemical exposure. It supports H295R as a translational platform for studying perturbations of adrenal steroid biosynthesis rather than clinical ACC care.¹²⁰

PMID 15254759: In vitro ghrelin exposure at 10^-8 M increased apoptosis in human adrenocortical tumor models, including NCI-H295 and SW-13 ACC-derived cell lines, while not altering basal apoptosis in normal rat or human adrenocortical and other non-tumor cell types. The study suggests a possible tumor-selective proapoptotic effect that remains exploratory.¹²¹

PMID 15525605: Using the ACC cell line NCI-H295R, this study found that PKA activation with dibutyryl cAMP promoted differentiation, reduced proliferation, and enhanced TNF-alpha-induced apoptosis, with associated induction of c-myc. The effect was cell-line specific and was not reproduced in several non-H295R comparator lines.¹²²

PMID 15702240: The study characterizes the SW-13 adrenocortical carcinoma-derived cell line as poorly steroidogenic and largely unresponsive to physiologic ACTH, lacking key ultrastructural features of steroid-producing cells. It supports SW-13 as a model for tumor-growth signaling, showing endothelin-1 and adrenomedullin promote proliferation and reduce apoptosis via expressed ETA and AM2-related receptors.⁸

PMID 15838303: Using the ACC-derived NCI-H295R cell line as a steroidogenic model, this study showed that endothelin-1 and angiotensin II synergistically increased aldosterone production, with endothelin-1 signaling mediated predominantly through the ETA receptor under the tested conditions.¹²³

PMID 15886257: This preclinical study found that PPARγ agonists in the NCI h295 adrenocortical cancer cell line reduced viability and proliferation, increased apoptosis, and enhanced steroidogenesis with shifts toward a less aggressive differentiation pattern. The findings suggest thiazolidinediones as investigational differentiation-inducing agents in ACC.¹²⁴

PMID 16216300: Using the H295R human adrenocortical carcinoma cell line as an in vitro model, this study showed that several PCB congeners and MeSO2-PCB metabolites alter transcription of multiple steroidogenic genes, suggesting chemical-specific disruption of adrenal steroidogenesis and hormone production pathways.¹²⁵

PMID 16273281: In the ACC-derived NCI-H295 cell line, neuropeptides B and W increased cell growth by enhancing proliferation and reducing apoptosis without changing steroid secretion. These effects were linked to GPR7/GPR8 expression and depended on tyrosine kinase-driven MAPK p42/p44 signaling rather than PKA, PKC, or p38 pathways.³⁸

PMID 16394175: Using the ACC cell line NCI-H295R, this study found that EGF and PGE2 increase aromatase activity and CYP19 expression through promoter II, with evidence that EGF partly acts via autocrine PGE2 signaling through EP1 and EP2 receptors and cAMP-PKA pathway involvement.¹²⁶

PMID 16673206: In the SW-13 adrenocortical carcinoma cell line, loss of TGF-beta type II receptor expression was associated with resistance to TGF-beta1-mediated growth inhibition. Stable restoration of the receptor reduced proliferation in response to exogenous TGF-beta1 and decreased xenograft tumor formation, supporting a tumor-suppressive role for this pathway in a preclinical ACC model.¹²⁷

PMID 16820888: The ACC cell line H295R was characterized as telomerase-negative and showing features consistent with alternative lengthening of telomeres, including absent hTERT expression, long heterogeneous telomeres, and presumed ALT-associated PML bodies. These findings support H295R as a translational model for studying telomere maintenance mechanisms in ACC.¹²⁸

PMID 16912135: In ACC cell lines H295 and SW13, type I interferons inhibited proliferation in vitro, with IFNβ1a markedly more potent than IFNα2b. The effect involved apoptosis and cell-cycle arrest, and in H295 cells IFNβ1a also suppressed IGF-II mRNA, supporting interferon signaling as a translational therapeutic lead requiring in vivo validation.¹²⁹

PMID 17265431: This review highlights the H295R human adrenocortical carcinoma cell line as an in vitro model for assessing adrenocortical toxicity and steroidogenesis, including measurement of steroid output, enzyme activity, and gene expression to identify molecular targets of adrenal toxicants.²⁹

PMID 17405826: In ACC cell lines, acylated and unacylated ghrelin increased proliferation and reduced apoptosis, with evidence that SW-13 cells express and secrete ghrelin consistent with an auto/paracrine growth loop. Antagonist data suggested involvement of GHS-R1a or a related receptor pathway.¹³⁰

PMID 17581752: This preclinical study used H295R and SW-13 ACC cell lines and nude-mouse xenografts to test mebendazole, finding inhibited tumor growth, reduced invasion and metastasis, and apoptosis induction without detected antiangiogenic effects. The report also notes variable baseline tumorigenicity improved by matrigel-assisted implantation.¹³¹

PMID 18000307: Using the ACC-derived H295R cell line, this study found that cholesterol sulphate reduced pregnenolone production and lowered StAR protein, StAR mRNA, and StAR promoter activity, while effects on other proteins such as P450scc were not observed. The findings support a translational model of steroidogenic regulation in adrenocortical tumor cells.¹³²

PMID 18063677: In the ACC cell line NCI h295R, Hoechst-defined side population cells showed a less differentiated steroidogenic expression pattern but did not demonstrate greater proliferation, stable self-renewal, or cytotoxic drug resistance versus non-side-population cells. These findings argue that side-population sorting is not a reliable stem cell-like marker in this ACC model.¹³³

PMID 18310271: In the H295R adrenocortical carcinoma cell line, mitotane caused modest growth inhibition, reversible G2 delay, broad suppression of steroid hormone secretion, and time-dependent proteomic changes affecting mitochondrial proteins, energy metabolism, stress-response pathways, cytoskeletal elements, and tumorigenesis-related proteins.¹³⁴

PMID 18484195: Using the H295R adrenocortical carcinoma cell line, this in vitro study found that prolactin increased both cortisol secretion and cell proliferation, with stronger proliferative effects than ACTH, estradiol, or progesterone, while testosterone and dihydrotestosterone showed little growth effect. These findings support H295R as a translational model for testing hormone-responsive ACC biology.¹³⁵

PMID 18491247: In SW-13 human adrenal carcinoma cell culture, paclitaxel and 2-methoxyestradiol showed the greatest cytotoxic potency, while cisplatin, etoposide, and cytosine arabinofuranoside were also active and mitotane was markedly less potent. The study highlights how in vitro ACC models can prioritize candidate agents for further animal and clinical evaluation.¹³⁶

PMID 18509009: In ACC cell lines, combining mitotane with ionizing radiation produced greater and more persistent growth inhibition than either treatment alone, with prolonged G2 arrest and cyclin B1/Cdc2-associated changes in H295R cells. The effect appeared independent of p53 status in this in vitro model.⁷¹

PMID 18713819: This study describes HAC15, a human adrenocortical carcinoma cell line derived from a pediatric tumor that retains ACTH, angiotensin II, and forskolin responsiveness. HAC15 produces cortisol and aldosterone, expresses MC2R and steroidogenic enzymes, and provides a model for studying human adrenal steroidogenesis.¹⁶

PMID 18793695: Using the NCI H295R adrenocortical carcinoma cell line as a steroidogenic model, this study found that PKC-activating PMA increased mitochondrial cholesterol content and aldosterone secretion, while ANP inhibited AngII- and PMA-driven cholesterol mobilization and steroid output. The work supports H295R cells for mechanistic studies of adrenal steroidogenesis signaling.¹³⁷

PMID 18854423: Using the NCI-H295R adrenocortical carcinoma cell line, this study shows expression of TASK-3 and TREK-1 potassium channels and links their modulation to membrane potential changes and altered aldosterone secretion. The findings support H295R as a translational model for human adrenal steroidogenic signaling rather than providing direct ACC clinical guidance.¹³⁸

PMID 19202555: Using ACC cell lines and primary adrenocortical carcinoma cultures as in vitro models, this study showed efficient adenoviral infection of adrenocortical cells, induction of inflammatory cytokines, and rapid dose-dependent increases in cortisol and other steroids with modulation of steroidogenic regulators.¹³⁹

PMID 19216023: Using the SW13 adrenocortical carcinoma cell line with mutant nonfunctional p53 and absent detectable p16 and p21, TBX2 overexpression promoted anchorage-independent growth and resistance to multiple apoptotic stresses. TBX2 upregulation was linked to PI3K/Akt signaling and altered caspase and apoptosis-regulator expression in a cell type-dependent manner.¹⁴⁰

PMID 19318454: This preclinical cell-line study found that isoquinolinone-class SF-1 inverse agonists selectively suppressed SF-1-driven proliferation in H295R adrenocortical cells and reduced stimulated steroid secretion and CYP21/CYP17 expression. The findings support SF-1 as a therapeutic target, especially in SF-1-overexpressing childhood adrenocortical tumors, while showing variable off-target toxicity among compound classes.¹⁴¹

PMID 19900470: Using the human ACC cell line H295R, this study shows that 3-MeSO2-DDE causes protein adduct formation, cytotoxicity, and biphasic effects on cortisol and aldosterone secretion with parallel changes in steroidogenic gene expression. The findings support H295R as a translational model for evaluating candidate adrenocorticolytic compounds and species-specific mechanisms.¹⁴²

PMID 19913079: Using the H295R adrenocortical carcinoma cell line as a steroidogenesis model, this study found that several VIOXX-related lactone derivatives inhibited CYP17 activity and induced G2/M cell-cycle arrest, while enterolactone showed no such effect. The excerpt supports H295R as a translational platform for testing steroidogenic and antiproliferative compounds.¹⁴³

PMID 19996587: A nude-mouse xenograft study found that ACC cell lines H295R and SW-13 express HB-EGF, and that the HB-EGF inhibitor CRM197 suppressed tumor growth, reduced angiogenesis, induced apoptosis, and inhibited invasion and migration. The work supports HB-EGF as a preclinical therapeutic target in ACC.¹⁴⁴

PMID 20074452: An in vitro study in the H295R adrenocortical carcinoma cell line found that the MEK inhibitor resorcylic acid lactone L-783,277 reduced viability and proliferation with IC50 values near 21 to 22 uM, altered cell-cycle distribution, and increased apoptosis at selected concentrations.¹⁴⁵

PMID 20231622: In the NCI-H295R ACC cell line, low-dose decitabine showed cytostatic antitumor activity, reducing proliferation, cortisol secretion, and invasion while restoring expression of selected underexpressed 11q13 genes. The study supports epigenetic gene silencing as a translational mechanism of ACC biology and a potential therapeutic target.¹⁴⁶

PMID 20383646: In the H295R adrenocortical carcinoma cell line, the CK2 inhibitor DMAT reduced cell viability and proliferation, induced modest apoptosis with G1 arrest, and altered steroid output by lowering aldosterone, DHEAS, and androstenedione while increasing 17-hydroxyprogesterone. These findings support CK2 as a potential translational therapeutic target in ACC.¹⁴⁷

PMID 20596677: In ACC cell lines H295R and SW13, mitotane enhanced sensitivity to ionizing radiation, producing irreversible growth inhibition and G2/M arrest. The study links this radiosensitization to cyclin B1/cdc2 complex dysregulation and reduced mismatch repair protein expression, supporting a mechanistic preclinical rationale for combined treatment.⁷²

PMID 20826579: This study shows that ACC tissues and ACC cell lines have markedly reduced TLR4, CD14, and MD2 expression with impaired lipopolysaccharide responsiveness, while restoring TLR4-CD14 signaling in NCI-H295R cells reactivates NF-kB signaling and reduces viability through apoptosis. These findings identify an immune-signaling defect in ACC and suggest a translational therapeutic target.¹⁴⁸

PMID 21376716: This preclinical study reports that rosiglitazone inhibits growth in ACC cell lines through cell-specific mechanisms: autophagy with AMPKalpha and beclin-1 upregulation, oxidative stress, and mitochondrial depolarization in H295R cells, versus G0/G1 cell-cycle arrest with reduced cyclin E and cdk2 activity in SW13 cells.¹⁴⁹

PMID 21529220: An in vitro study using the human H295R adrenocortical carcinoma cell line found that melatonin combined with the lignans enterolactone or enterodiol reduced cAMP-stimulated estradiol, androstenedione, and cortisol secretion and lowered aromatase content, while increasing progesterone and 17-hydroxyprogesterone.¹⁵⁰

PMID 21641976: This in vitro study uses the human ACC-derived H295R cell line as a model of adrenal steroidogenesis, showing that perfluorinated compounds can differentially alter hormone secretion, gene expression, and viability. PFOS increased estradiol, progesterone, and testosterone secretion, while high-dose PFNA induced apoptosis.¹⁵¹

PMID 21757861: Using the NCI-H295R adrenocortical carcinoma cell line, this study shows that efonidipine enhanced dbcAMP-induced DHEA-S production and increased StAR expression, with effects interpreted as independent of Ca2+ influx. The findings illustrate how ACC-derived cell models can uncover drug effects on steroidogenic regulation.¹⁵²

PMID 21924324: This review summarizes human adrenocortical carcinoma cell lines as experimental models, highlighting NCI-H295 derivatives and HAC15 as the main continuously growing steroidogenic systems, while noting that several other lines lack steroid production or long-term stability. It emphasizes differences in agonist responsiveness, differentiation state, and culture-condition effects that shape their utility for ACC biology studies.¹

PMID 21958059: This pharmaceutical development study evaluated mitotane-loaded solid lipid nanoparticles and nanostructured lipid carriers as experimental drug-delivery systems for ACC. Solid lipid nanoparticles showed smaller size, high encapsulation efficiency, and hydrophilic coating strategies that shifted surface charge positive to support potential mucoadhesion and improved oral bioavailability.¹⁵³

PMID 21968616: This preclinical study found that the IGF-1R inhibitor picropodophyllin suppressed proliferation of H295R and SW-13 adrenocortical carcinoma cell lines, with G2/M arrest and increased apoptosis. The effect appeared more potent than NVP-AEW541 in vitro, while its mechanism in ACC cells did not clearly track with IGF-1R, Akt, or ERK phosphorylation changes.⁴⁵

PMID 22136818: In ACC cell-line experiments, radiation-induced cell death included a necroptosis component mediated by RIP1 in addition to apoptosis. Pharmacologic inhibition of necroptosis increased radioresistance in RIP1-expressing SW13 cells but not RIP1-deficient H295R cells, suggesting a translational radiosensitization target.¹⁵⁴

PMID 22156929: This preclinical study used ACC tumor expression profiling, immunohistochemistry, cell lines, and mouse xenografts to identify SPARC overexpression and test nab-paclitaxel. Nab-paclitaxel showed markedly lower in vitro IC50 values than mitotane and greater xenograft tumor-weight reduction, supporting further translational evaluation.¹⁵⁵

PMID 22172629: Using the human adrenocortical H295R cell model, this study showed that several nonhydroxylated flavones increased CYP11B1 expression and cortisol synthesis, whereas some hydroxylated flavonoids repressed CYP11B1 or were cytotoxic. The findings illustrate how H295R can be used to probe steroidogenic regulation relevant to adrenal cortical biology.¹⁵⁶

PMID 22191569: An in vitro study in human H295R and mouse Y1 adrenocortical cancer cells found that bitter melon extract reduced proliferation, increased apoptotic markers, altered cell-cycle regulators, decreased steroidogenesis-related proteins, and suppressed IGF1R-AKT signaling, with less cytotoxicity in normal rat adrenal cells.¹⁵⁷

PMID 22315453: Using the HAC15 adrenocortical carcinoma cell line, lentiviral expression of the KCNJ5 T158A mutant increased aldosterone secretion, 18-oxocortisol production, sodium influx, membrane depolarization, and intracellular calcium. The model supports a mechanistic link between mutant KCNJ5 signaling and steroidogenic activation while showing only modestly reduced cell proliferation.¹⁷

PMID 22546480: Using the ACC-derived NCI-H295 cell line, this study found that mitotane suppresses cortisol secretion without short-term cytotoxicity and broadly alters transcription of steroidogenic enzymes, with particular sensitivity of StAR and CYP11A1 and a biphasic effect on CYP11B1 under basal and cAMP-stimulated conditions.¹⁵⁸

PMID 22654799: In ACC cell lines, sunitinib showed dose-dependent antiproliferative activity and reduced cortisol secretion while shifting steroid profiles toward precursor accumulation, consistent with HSD3B2 downregulation rather than direct enzyme inhibition. The study also found frequent VEGF and VEGF-R2 expression in ACC tissue samples, supporting translational interest in this pathway.¹⁵⁹

PMID 22960230: In the H295R ACC cell line and corresponding mouse xenografts, the dual PI3K/mTOR inhibitor NVP-BEZ235 suppressed Akt and S6 phosphorylation, reduced proliferation, increased apoptotic subG1 fractions, and slowed tumor growth. BEZ235 also triggered compensatory Erk activation, and combining it with an Erk inhibitor further enhanced antiproliferative effects in vitro.⁴⁶

PMID 23028800: In ACC cell lines with dysfunctional TP53, restoration of wild-type p53 enhanced growth inhibition and apoptosis after ionizing radiation and was associated with reduced IGF2 expression and Akt activation. These in vitro findings suggest a mechanistic basis for variable radiosensitivity linked to TP53 status.¹⁶⁰

PMID 23077346: Using the H295R human adrenocortical carcinoma cell line and in vitro RNA-binding assays, this study proposes that AKAP1 binds the 3’ untranslated region of STAR mRNA and may localize it to mitochondria, influencing STAR translation and steroidogenesis. It also suggests interaction of AKAP1 with Argonaute 2, linking this system to posttranscriptional regulation.¹⁶¹

PMID 23111828: In the NCI-H295R adrenocortical carcinoma cell line, griseofulvin produced dose-dependent reductions in viability and proliferation and increased apoptosis over 24 to 48 hours. The study supports centrosomal clustering and microtubule disruption as a preclinical therapeutic concept warranting further investigation.¹⁶²

PMID 23111829: This study characterizes the ACC-derived NCI-H295R cell line as a preclinical model for hyperaldosteronism, showing predominantly cortisol secretion at baseline but stimulus-responsive aldosterone production, especially with potassium. It also shows that spheroid culture alters steroidogenic output through growth-factor effects rather than true enrichment of less differentiated cells.¹⁶³

PMID 23254310: Using the NCI-H295R ACC cell line, this study found that 24-hour mitotane exposure reduced cell viability, increased caspase-3/7 activity, lowered cortisol and DHEAS secretion, and downregulated steroidogenesis-related transcripts including CYP11A1 and CYP17A1. The work highlights a translational cell-model platform for studying mitotane effects and candidate response biomarkers.¹⁶⁴

PMID 23370353: Using the human ACC cell line NCI-H295R, this study applied GC-MS steroid profiling to measure nine secreted steroids after polyphenol exposure. Apigenin reduced steroidogenesis patterns consistent with inhibition of 3β-HSD, CYP17, and CYP21, with associated decreases in corresponding mRNA expression.¹⁶⁵

PMID 23409032: Using H295R ACC cells with an activating CTNNB1 mutation, inducible β-catenin silencing reduced Wnt target expression, slowed proliferation, caused G1 accumulation, increased apoptosis, and prevented xenograft tumor growth in mice. These findings support Wnt/β-catenin dependence in a molecular ACC model and nominate the pathway for therapeutic investigation.⁴⁷

PMID 23507702: In primary ACC cultures and ACC cell lines, interferon-β inhibited cell growth, induced apoptosis, reduced cortisol secretion, downregulated steroidogenic enzyme expression, and counteracted IGF2 signaling. Its additive activity with mitotane suggests a translational rationale for combination strategies and possibly lower mitotane exposure.¹⁶⁶

PMID 23616146: This study uses the ACC-derived H295R cell line as a steroidogenesis model and validates an LC-MS/MS assay for cortisol and corticosterone measurement. It shows dose-dependent suppression of glucocorticoid production by ketoconazole, prochloraz, and budesonide, and induction by forskolin, with proposed quality-control criteria for H295R testing.¹⁶⁷

PMID 23708528: This in vitro study used the human adrenocortical carcinoma H295R cell line as a steroidogenic model to test how single pesticides and binary pesticide mixtures alter estrone production. The findings support H295R cells as a translational platform for studying mixture effects on adrenal steroidogenesis, including additive and dominant-compound interactions.¹⁶⁸

PMID 23722227: Using ACC cell lines H295R and SW13, this study shows that mitotane at therapeutically relevant concentrations accumulates intracellularly and induces caspase 3/7-associated apoptosis linked to mitochondrial swelling, cristae loss, membrane depolarization, reduced oxygen consumption, and lower VDAC1 levels.⁶⁶

PMID 23900415: Using ACC-derived H295R and HAC15 cell lines with primary human adrenal cultures, this study shows that PKC-induced activin A suppresses CYP17A1 and shifts steroidogenesis away from cortisol and androgen production toward aldosterone. The findings position ACC cell lines as translational models for human adrenal zonation and steroidogenic regulation.²⁶

PMID 24018612: This in vitro study in H295R and SW-13 ACC cell lines found that gemcitabine has cytotoxic activity, but its interaction with mitotane is cell-line dependent: antagonistic in mitotane-sensitive H295R and mostly synergistic in mitotane-insensitive SW-13, with parallel differences in RRM1 modulation.⁷³

PMID 24153038: This in vitro study tested ouabain alone and with everolimus in adrenocortical tumor models, including H295R, SW13, and primary tumor cultures. Ouabain reduced viability and DNA synthesis, with stronger antiproliferative effects in combination with everolimus, while cell death appeared predominantly necrotic rather than apoptotic.¹⁶⁹

PMID 24269839: Using the H295R ACC cell line and human tumor samples, this study found that 1,25-dihydroxyvitamin D3 moderately reduced proliferation through VDR-dependent G1 cell-cycle arrest with decreased CDK4, without increased apoptosis. ACC tissues showed lower VDR mRNA expression and weaker immunostaining than benign adrenocortical tumors.¹⁷⁰

PMID 24377872: A canine cortisol-secreting adrenocortical tumor study found increased ANGPT2 expression and a higher ANGPT2-to-ANGPT1 ratio in both adenomas and carcinomas versus normal adrenal tissue, supporting a proangiogenic state. Complementary experiments in the human H295R ACC cell line showed ANGPT2 upregulation with cAMP and progesterone, suggesting a translational angiogenesis pathway of interest.¹⁷¹

PMID 24403451: A xenograft-based preclinical method using serial low-dose cyclophosphamide exposure in SW-13 adrenocortical carcinoma cells enriched a stem-like, chemoresistant cell population with increased colony and sphere formation. Enriched cells showed higher CXCR4 and ABCG2 expression, supporting this model for studying ACC cancer stem cell biology and treatment resistance.⁴²

PMID 24403568: Using the H295R adrenocortical carcinoma cell line, this study identified PCP4 as a regulator of aldosterone synthesis: PCP4 overexpression increased angiotensin-II-driven CYP11B2 promoter activity, while PCP4 knockdown reduced CYP11B2 expression and aldosterone production without clear effects on cortisol-related output.¹⁷²

PMID 24486430: This article uses H295R adrenocortical carcinoma cells in co-culture with BeWo trophoblast cells to model fetoplacental steroidogenesis. The system shows that H295R can provide fetal-like steroid precursors and reveals compartment-specific effects of endocrine-disrupting chemicals on aromatase activity and estrogen output.¹⁷³

PMID 24610083: Using the ACC-derived H295R cell line as a steroidogenic model, this study showed that resveratrol, piceatannol, and synthetic resveratrol analogs inhibit CYP17A1 activity, reducing DHEA, testosterone, and cortisol secretion while increasing progesterone and aldosterone. RSVTM showed relatively selective inhibition of 17,20-lyase activity.¹⁷⁴

PMID 24763440: This preclinical study reports that naturally derived withanolides showed nanomolar antiproliferative activity in ACC cell lines, with induction of G2/M arrest and apoptosis and modulation of Jagged1, MAPK, and Akt/mTOR pathway proteins. Acetylated derivatives such as WGA-TA appeared more potent than parent compounds and showed higher selectivity than normal fibroblasts in vitro.¹⁷⁵

PMID 24850175: This preclinical study found HSP90 overexpression in ACC compared with adrenocortical adenoma and normal adrenal tissue, and showed that the HSP90 inhibitor AUY922 reduced ACC cell viability and migration while increasing apoptosis in SW13 and H295R cell models.³⁹

PMID 25004807: In the H295R ACC cell line, adhesion to type V collagen increased staurosporine-induced apoptosis from low baseline levels, an effect blocked by anti-integrin alpha2 antibody and associated with reduced ERK activation but not altered AKT activation. The study highlights extracellular matrix context as a modifier of apoptotic responsiveness in ACC preclinical models.¹⁷⁶

PMID 25096913: This in vitro study used ACC cell lines and primary adrenocortical tumor cultures to show that low-dose mitotane can enhance doxorubicin cytotoxicity in P-gp-expressing models by inhibiting P-gp function. The effect varied across models, supporting a mechanistic explanation for combination therapy while highlighting heterogeneity in drug response.⁶⁷

PMID 25268545: In the H295R adrenocortical carcinoma cell line, depletion of PRKAR1A or PRKAR2B increased apoptosis resistance and cell-cycle progression while activating PKA, MEK/ERK, and NF-κB signaling. The two PKA regulatory subunits showed overlapping but distinct effects on cyclin and cyclin-dependent kinase regulation, supporting nonredundant roles in adrenocortical tumor biology.¹⁷⁷

PMID 25319929: In the NCI-H295R human adrenocortical cell model, orexin-A increased OX1 receptor expression, cell proliferation, 3β-HSD expression, AKT phosphorylation, and cortisol secretion. Pharmacologic blockade of OX1 receptor or AKT partially reversed these effects, supporting an OX1-AKT signaling mechanism in steroidogenic adrenocortical cells.¹⁷⁸

PMID 25334044: Using the H295R adrenocortical carcinoma cell line, this study models how exogenous GIP receptor expression can increase steroidogenic enzyme expression and cortisol production after GIP stimulation. The findings suggest that intracrine ACTH and MC2R signaling partly mediate this response, supporting H295R as a mechanistic platform for adrenal steroidogenesis research.¹⁷⁹

PMID 25602349: Using the NCI-H295R adrenocortical carcinoma cell line, this in vitro study found that glycoxidized LDL increased aldosterone release more than native LDL in angiotensin II-sensitized cells, with ERK1/2, JAK2, and PKA signaling implicated in CYP11B2 regulation.¹⁸⁰

PMID 25691058: A 2D-DIGE and mass spectrometry proteomic comparison of ACC versus normal adrenal identified 22 differentially expressed proteins, largely upregulated metabolic and mitochondrial proteins consistent with a Warburg-like metabolic shift. Six candidates were validated by Western blot and immunohistochemistry, supporting their investigation as biomarkers and therapeutic targets.¹⁸¹

PMID 25871633: Using the H295R adrenocortical carcinoma cell line as an endocrine-disruption model, this study found that perfluorooctyl iodide increased aldosterone, cortisol, and estradiol production, altered steroidogenic gene expression, and raised adenylate cyclase activity and cAMP. The findings illustrate how ACC-derived cell models can be used to study steroidogenesis regulation by environmental chemicals.¹⁸²

PMID 25998841: This study examines the NCI-H295R adrenocortical carcinoma cell line as a model of aldosterone biology and finds that, despite detectable GIRK4 protein expression, it lacks functional KCNJ5/GIRK4 channel activity. The findings highlight a limitation of this widely used ACC-derived in vitro model for studying KCNJ5-dependent hyperaldosteronism mechanisms.²⁷

PMID 26033247: This review summarizes available ACC xenograft models, including murine Y1/Y6, human cell line-derived NCI-H295 and SW-13, pediatric SJ-ACC3, and emerging adult patient-derived tissue xenografts. It highlights their uses for functional studies and therapeutic testing, while emphasizing limits in modeling tumor heterogeneity and biologic fidelity after cell culture.¹⁰

PMID 26131713: This preclinical study reports that the GPER agonist G-1 inhibits H295R adrenocortical carcinoma growth in vitro and in xenograft models, with G2 cell-cycle arrest, DNA damage, intrinsic apoptosis, and sustained ERK1/2 activation. Partial reversal by GPER knockdown suggests both GPER-dependent and GPER-independent effects that warrant further translational study.¹⁸³

PMID 26582501: This preclinical study evaluated cholesterol-free synthetic HDL nanoparticles in ACC cell lines and multicellular aggregates, showing synergy with etoposide, cisplatin, and mitotane, increased apoptosis, and marked suppression of cortisol production and steroidogenic enzyme expression. The findings support SR-BI-directed cholesterol depletion as a translational therapeutic concept requiring further investigation.¹⁸⁴

PMID 26582503: Discussion content describes preclinical translational work targeting SRB1 in ACC, noting markedly elevated receptor expression versus other cancers and normal cells, persistent expression in monolayer cultures, and preliminary in vivo nanoparticle targeting and localization that support HDL-based therapeutic development.¹⁸⁵

PMID 26781511: This study uses the human ACC-derived H295R cell line as a high-throughput in vitro steroidogenesis platform, combining 96-well screening with HPLC-MS/MS measurement of multiple steroid hormones. The assay identified distinct chemical-response profiles and putative enzyme-level mechanisms, illustrating the translational utility of H295R cells for modeling adrenal steroid biosynthesis.³⁰

PMID 26843528: This preclinical study shows that ATR-101 suppresses H295R adrenocortical carcinoma xenograft establishment and growth and induces apoptosis in vitro and in vivo. Mechanistically, ATR-101 disrupts mitochondrial function through F1F0-ATPase inhibition, with reactive oxygen generation and ATP depletion preceding cytochrome c release and caspase activation.¹⁸⁶

PMID 26873959: High-throughput screening of 4,292 compounds across three ACC cell lines identified niclosamide as a potent preclinical candidate, with stronger in vitro activity than several established ACC drugs and marked xenograft growth inhibition. Reported effects included G1 arrest, caspase-dependent apoptosis, reduced migration and EMT markers, decreased beta-catenin expression, and mitochondrial uncoupling.⁵³

PMID 26986192: This preclinical study evaluates ATR-101, an ACAT1 inhibitor, in ACC cell lines and dogs, showing that ACAT1 blockade raises free cholesterol, triggers ER stress and unfolded protein response signaling, and induces apoptosis in adrenocortical cells while reducing adrenal steroid production in vivo.¹⁸⁷

PMID 27035283: This preclinical study reports that n-3 polyunsaturated fatty acids inhibited ACC cell proliferation, colony formation, cell-cycle progression, and promoted apoptosis in SW13 and H295R models. Dietary n-3 supplementation and fat-1 transgenic systems also suppressed xenograft growth, with associated inhibition of mTORC1 and mTORC2 signaling in vitro and in vivo.¹⁸⁸

PMID 27057163: This article describes a computational steroidogenesis model built in the NCI-H295R adrenocortical carcinoma cell line, integrating cholesterol handling, steroidogenic enzymes, and multisteroid measurements to infer likely enzyme targets of adrenal toxicants. It highlights HSD3B2 as a major determinant of steroidogenic balance and positions the platform as a translational tool for mechanism-focused adrenal toxicology.¹⁸⁹

PMID 27177645: This preclinical study found aurora kinase overexpression in adrenocortical carcinoma tissues and tested aurora kinase inhibitors in ACC-related models, showing VX-680 activity in SW13 and adrenal metastatic primary cultures but not in the H295R ACC cell line. The findings highlight marked model-specific drug sensitivity and limitations of commonly used ACC cell systems for translational therapeutic testing.⁶¹

PMID 27188280: Using the H295R adrenocortical carcinoma cell line as an in vitro steroidogenesis model, EGb761 decreased testosterone and 17β-estradiol production, reduced CYP19 and 17β-HSD1 expression, and inhibited aromatase activity without altering cortisol or aldosterone output at non-cytotoxic concentrations.¹⁹⁰

PMID 27293433: In the H295R adrenocortical carcinoma cell line, angiotensin II synergized with insulin or IGF-1 to markedly increase ERK1/2 activation through AT1R-, PKC-, and MEK-dependent signaling, with associated upregulation of CYP11B1 and CYP11B2 expression. These findings support H295R as a model for studying pathway crosstalk linking growth signaling and steroidogenic output in ACC.¹⁹¹

PMID 27391065: Preclinical H295R cell and xenograft data suggest metformin suppresses ACC growth by reducing viability and proliferation, activating AMPK, inhibiting ERK and mTOR signaling, downregulating the IGF2/IGF-1R axis, and promoting apoptosis. The study supports metformin as an investigational translational candidate rather than established therapy.⁵⁴

PMID 27513369: Using the H295R human adrenocortical carcinoma cell line alongside zebrafish, this study shows that several low molecular weight phthalates and most tested metabolites reduced testosterone, increased the estradiol-to-testosterone ratio, and altered steroidogenic gene expression including StAR downregulation and CYP19A upregulation.¹⁹²

PMID 27603910: This study shows that temozolomide inhibits growth of ACC cell lines, 3D spheroids, and most tested primary ACC cultures in vitro through apoptosis, cytotoxicity, cytostasis, and cell-cycle arrest. It also evaluates MGMT promoter methylation and expression as potential translational biomarkers, finding low methylation overall and only an inverse relation with MGMT mRNA in ACC tissues.⁵⁵

PMID 27626976: In ACC cell lines, primary tumor cultures, and NCI-H295R xenografts, abiraterone acetate reduced cortisol and androgen secretion, increased progesterone, and inhibited tumor growth. The study also linked antitumor activity to reduced beta-catenin nuclear accumulation and progesterone receptor–dependent cytotoxicity.⁵⁶

PMID 27706226: Using the H295R adrenocortical carcinoma cell line as a steroidogenic model, this study found that fourth-generation progestins can alter adrenal steroid output, largely through inhibition of 3βHSD2 and possibly CYP17A1. The work highlights H295R as a translational platform for probing steroid biosynthesis and drug-enzyme interactions relevant to adrenocortical tumors.¹⁹³

PMID 28073588: This translational study identifies CYP2A6 as frequently overexpressed in adrenocortical carcinoma, with copy gain in a subset of tumors and increased protein expression versus normal adrenal cortex. In NCI-H295R cells, CYP2A6 silencing reduced viability and increased sensitivity to mitotane and cisplatin, supporting a potential chemoresistance mechanism.¹⁹⁴

PMID 28410270: In ACC preclinical models, the pan-aurora kinase inhibitor AMG 900 suppressed histone H3 Ser10 phosphorylation, reduced proliferation in NCI-H295 cells and primary adrenocortical tumor cultures, induced apoptosis, and enhanced sensitivity to mitotane, doxorubicin, and etoposide. The study also linked AMG 900 exposure to Notch pathway activation and potential vulnerability to combined pathway inhibition.⁴⁸

PMID 28423559: This preclinical study found that rottlerin suppressed ACC cell proliferation, migration, and invasion, induced apoptosis and G0/G1 arrest in NCI-H295R and SW-13 cells, and reduced xenograft growth in mice. The reported mechanism involved downregulation of LRP6, phosphorylated LRP6, and beta-catenin, implicating Wnt/beta-catenin pathway suppression.¹⁹⁵

PMID 28695321: An immunohistochemical morphometric study of adrenocortical tumors found higher CD31-positive blood vessel density in ACC than in cortisol-secreting adenomas, while D2-40-positive lymphatic density was lower in ACC and correlated with StAR expression. These findings suggest angiogenesis may relate to malignant behavior, whereas lymphangiogenesis may track steroidogenic function.¹⁹⁶

PMID 28919755: This preclinical study exploits SRB1 overexpression in ACC to deliver withalongolide A via synthetic HDL nanodisks, improving uptake, in vitro cytotoxicity in H295R cells, xenograft accumulation, and tumor growth inhibition in mice. It highlights a translational nanomedicine strategy for targeted ACC drug delivery.¹⁹⁷

PMID 29299119: In H295R adrenocortical carcinoma cells, mitotane disrupted mitochondria-associated membranes, altered aspartate and glutamate balance, changed phospholipid metabolism, and reduced several MAM-associated proteins. TSPO inhibition with PK11195 potentiated mitotane-induced apoptosis and steroid suppression in vitro, suggesting a translational therapeutic vulnerability.¹⁹⁸

PMID 29307715: Using the H295A human adrenocortical cell line, this preclinical study found that bisphenol A increased adrenal cortical cell proliferation and upregulated sonic hedgehog pathway activity through ERβ-dependent signaling. Pharmacologic inhibition of Shh or ERβ blocked these proliferative effects, supporting a mechanistic model of adrenal growth regulation.¹⁹⁹

PMID 29371329: This article reports two new ACC cell lines with matched patient-derived xenograft models that preserve adrenal cortical marker expression and reflect distinct molecular contexts, including CTNNB1-mutant disease and TP53-mutant, MSH2-deficient Lynch syndrome-associated ACC. These models expand tools for studying ACC biology and testing patient-specific therapeutic targets.³

PMID 29372993: This preclinical study developed gold nanoparticles functionalized with anti-MC2R antibodies to target adrenocortical tumor cells. In tissue sections and the H295R ACC cell line, the probes showed specific binding with low background, supporting investigation as imaging agents or targeted delivery platforms.²⁰⁰

PMID 29507530: This preclinical study used ACC monolayer and 3D spheroid models, including a patient-derived cell culture, to compare drug effects and found marked spheroid resistance to several agents, especially mitotane. Nilotinib showed stronger viability reduction than mitotane in spheroids and was linked to ERK1/2 pathway activity.⁶²

PMID 29630043: This methods article describes an in vitro ACC model using the SW-13 cell line to quantify filopodia, lobopodia, and lamellipodia and relate membrane-extension patterns to adhesion behavior. In DKK3-overexpressing cells, increased lobopodia and multidirectional polarity were associated with stronger attachment, supporting study of WNT-related differentiation and invasive phenotypes.⁴⁴

PMID 29734384: In H295R adrenocortical carcinoma cells, pharmacologic inhibition with metyrapone and siRNA silencing of CYP11B1 did not alter mitotane cytotoxicity, uptake, or conversion to o,p’-DDE and o,p’-DDA. These findings argue against CYP11B1 as a crucial mediator of mitotane activation in this preclinical model.²⁰¹

PMID 29850793: This preclinical study identifies NNT-dependent mitochondrial redox control as a potential therapeutic vulnerability in ACC. In NCI-H295R cells, NNT knockdown increased oxidative stress, suppressed proliferation, increased apoptosis, altered steroidogenesis, and revealed metabolic adaptation to chronic oxidative stress.²⁰²

PMID 30017865: This study uses the H295R adrenocortical carcinoma cell line to develop an LC-MS/MS platform measuring 19 steroid pathway metabolites and pairs it with dynamic first-order modeling of steroidogenesis under forskolin stimulation. The work positions H295R-based steroid profiling as a translational assay platform rather than a direct clinical ACC study.³¹

PMID 30250647: This preclinical study found that combined flavopiridol and carfilzomib showed synergistic anti-ACC activity in cell lines, 3D spheroids, and xenografts, with increased G2M arrest and apoptosis. CDK1, CDK2, and XIAP were overexpressed in human ACC samples, and XIAP reduction emerged as a potential response biomarker.⁶⁴

PMID 30367443: This in vitro study shows that progesterone reduced viability of ACC cell lines and primary ACC cultures in a concentration-dependent manner, mainly through apoptosis, with possible involvement of reduced beta-catenin nuclear translocation. Progesterone also showed synergistic cytotoxicity with mitotane, supporting further translational evaluation.⁵⁷

PMID 30650062: This preclinical study evaluated MDR1/P-glycoprotein expression in ACC tissues and cell lines and tested whether pharmacologic P-gp inhibition alters chemosensitivity. In vitro, tariquidar and verapamil increased H295R and HAC15 sensitivity to doxorubicin and etoposide, supporting MDR1 as a candidate target to improve cytotoxic treatment.⁶⁸

PMID 30777494: Using the NCI-H295R adrenocortical carcinoma cell line and mouse xenografts, this preclinical study identified a pregnane steroid derivative that modulated P-glycoprotein-mediated doxorubicin resistance, reduced xenograft tumour growth, and prolonged survival in vivo.²⁰³

PMID 30870809: Whole-exome sequencing of the commonly used ACC cell lines NCI-H295R and SW-13 showed shared TP53 dysregulation with distinct subtype-linked alterations in WNT signaling for NCI-H295R and chromatin-remodeling pathways for SW-13. Both lines resembled more aggressive ACC subsets in TCGA, informing how these models should be selected and interpreted in translational studies.⁹

PMID 31301403: Using the H295R adrenocortical carcinoma cell model, this study found that 5-oxo-ETE signaling through the OXE receptor increased cell migration and activated ERK, p38, and PKC-dependent pathways, while showing little direct effect on proliferation in parental cells.²⁰⁴

PMID 31325906: This study uses newly developed ACC patient-derived xenograft models and matched cell lines, together with H295R, to identify PDZ-binding kinase as a candidate therapeutic target. PBK was overexpressed in ACC, associated with poorer survival, and pharmacologic inhibition reduced proliferation and xenograft tumor growth.⁶⁵

PMID 31496655: This preclinical study found that thapsigargin reduced proliferation, migration, invasion, and xenograft growth in ACC models while increasing apoptosis and endoplasmic reticulum stress signaling. The reported mechanism linked these effects to activation of JNK-associated stress pathways in SW-13 and NCI-H295R cells.²⁰⁵

PMID 31536779: This preclinical study evaluated cabazitaxel in ACC cell lines and primary human ACC cultures, finding reduced cell viability, effects on apoptosis and cell-cycle regulators, and additive to moderately synergistic activity with mitotane. Cabazitaxel activity appeared less dependent on ABCB1/P-glycoprotein than paclitaxel, supporting clinical investigation.⁵⁹

PMID 31561990: This discussion summarizes preclinical ACC work on an Hsp90 inhibitor, noting increased apoptosis, decreased proliferation, use of fibroblast control cell lines, and limited side effects in mouse studies. It also highlights planned mechanistic follow-up using siRNA and comparisons with beta-catenin or mTOR pathway inhibitors as next steps.²⁰⁶

PMID 31561992: This preclinical study reports that the novel C-terminal Hsp90 inhibitor KU758 reduced viability, migration, invasion, and aggregate formation in ACC cell lines, while decreasing beta-catenin signaling and altering long noncoding RNA expression, including upregulation of the tumor suppressor GAS5.²⁰⁷

PMID 31587178: An in vitro H295R ACC study found that mitotane and 1α,25-dihydroxyvitamin D3 each reduced cell growth and migration, while their combination produced an additive antiproliferative effect and enhanced migration suppression. The reported effects were linked to modulation of VDR and Wnt/beta-catenin signaling, supporting exploration of combination strategies in translational ACC models.²⁰⁸

PMID 31596553: This preclinical study developed a polymeric micellar mitotane nanoformulation with high aqueous solubility and drug loading, showing preserved cytotoxic activity in ACC NCI-H295 cells grown as both monolayers and 3D spheroids. The formulation is proposed as a potential strategy to address mitotane’s poor bioavailability and pharmacokinetic limitations.²⁰⁹

PMID 31611400: Using the ACC cell line NCI-H295R and public database analyses, this study reports marked sensitivity of ACC cells to GPX4-targeted ferroptosis induction, while mitotane caused a distinct nonapoptotic, nonferroptotic necrotic death pattern. The findings identify ferroptosis as a translational therapeutic vulnerability requiring further clinical investigation.²¹⁰

PMID 31613736: This review uses the H295R adrenocortical carcinoma cell line as an in vitro model showing that adipocyte-derived supernatants can increase CYP11B1 mRNA expression, suggesting a possible link between obesity-related adipokine signaling and adrenal cortisol synthesis. It also highlights a key model limitation: constitutively active beta-catenin in H295R cells may confound interpretation.²¹¹

PMID 31634687: Using the H295R adrenocortical carcinoma cell line, this study shows that stimulus-induced IL-8 transcription is regulated through distinct signaling routes: Gαq-coupled receptor activation signals mainly via AP-1, IL-1β via NF-κB, and TPA via both pathways. These findings position H295R as a translational model for inflammatory signaling in ACC cells.²¹²

PMID 31814847: In ACC cell lines SW-13 and NCI-H295R, tauroursodeoxycholic acid reduced ER stress markers, increased autophagy signaling, decreased apoptosis-associated Bax, increased Bcl-2, and promoted proliferation, migration, and invasion. These findings implicate ER stress and autophagy pathways as candidate translational targets in ACC biology.²¹³

PMID 31817072: An in vitro co-culture model of ACC H295R cells with adipose-derived stem cells suggests reciprocal tumor microenvironment reprogramming that increases cancer-cell proliferation, migration, invasion, and glycolytic metabolism. The study implicates leptin signaling and a shift toward CXCR7 expression as candidate mediators of adipose-driven ACC progression.⁴⁰

PMID 31910152: This study generated a mitotane-resistant HAC-15 adrenocortical carcinoma cell-line model, showing higher mitotane IC50 values, preserved mitochondrial morphology during exposure, altered lipid homeostasis, reduced steroid production, and pathway changes involving steroid metabolism, apoptosis, cell growth, and Wnt signaling.⁶⁹

PMID 32060727: This in vitro study tested redox-responsive human serum albumin nanoparticles functionalized with curcumin and lipoic acid as a doxorubicin delivery system for ACC. In H295R cells, the formulation showed glutathione-triggered swelling and drug release, rapid cellular uptake, and greater cytotoxicity than free doxorubicin.²¹⁴

PMID 32116670: This preclinical study tested wild mountain Mentha longifolia extract in adrenocortical tumor cell lines H295R and SW13, showing reduced viability, clonogenic survival, and increased cell death, with greater effects in SW13 cells. The extract modulated MAPK and PI3K/Akt signaling, while combination with mitotane did not appear to enhance efficacy.²¹⁵

PMID 32283844: This preclinical study found that trabectedin showed sub-nanomolar cytotoxicity in ACC cell lines and patient-derived primary cultures, with synergy observed when combined with mitotane in NCI-H295R cells. The work also suggests possible modulation of Wnt/beta-catenin signaling, supporting further translational evaluation of this drug combination.⁵⁸

PMID 32349159: In the widely used ACC cell model NCI-H295, steroid output varies substantially by substrain, passage number, supplier, and culture medium, altering glucocorticoid, mineralocorticoid, and androgen profiles. LC-MS/MS profiling also showed distinct metabolite shifts after abiraterone, metyrapone, and mitotane exposure, underscoring the need to standardize experimental conditions.⁴

PMID 32437254: In the human ACC NCI-H295R cell line, 48-hour copper sulfate exposure reduced cell viability and caused dose-dependent suppression of progesterone and testosterone secretion, with stronger effects at higher concentrations. The study uses NCI-H295R as an in vitro model for endocrine disruption and steroidogenesis toxicity.²¹⁶

PMID 32478073: This review and in vitro coculture work describes metabolic crosstalk between ACC cells and adipose stem cells, showing that H295R exposure reduced adipocyte differentiation markers and lipid accumulation while increasing glucose uptake and lactate production. The findings frame ACC-associated stromal reprogramming as a translational model of tumor microenvironment metabolism.⁴¹

PMID 32901497: Using the ACC-derived NCI-H295R cell line as a validated steroidogenesis assay model, this in vitro study found that nickel chloride altered hormone output after 48 hours, with dose-dependent reductions in progesterone and testosterone and increased estradiol at lower concentrations before marked cytotoxicity at higher doses.²¹⁷

PMID 33133015: In the HAC15 adrenocortical carcinoma cell line, adropin signaling through GPR19 increased proliferation via ERK1/2 and AKT pathways while suppressing steroidogenic gene expression and reducing cortisol and aldosterone production, with TGF-beta signaling implicated in the steroidogenesis effect. The study also reports higher GPR19 expression in ACC than in normal adrenal tissue, suggesting possible biologic and prognostic relevance.²¹⁸

PMID 33830941: This study describes JIL-2266, a novel patient-derived ACC cell line established directly from a primary tumor, showing SF-1 positivity, absent significant steroid synthesis, TP53 and MUTYH mutations, high tumor mutational burden, and oxidative DNA damage from impaired MUTYH-dependent repair. The model is proposed for investigating ACC biology and potential determinants of immunotherapy response.²¹⁹

PMID 33904018: This in vitro study used the ACC H295R cell line to test a chitin-like exopolysaccharide from Mortierella alpina, reporting cytotoxic and pro-apoptotic effects comparable to some mitotane exposures and a slight added effect when combined with lower-dose mitotane.²²⁰

PMID 33907586: This preclinical study found that curcumin reduced viability, migration, and invasion of ACC cell lines, increased apoptosis, and suppressed SW-13 xenograft growth. Transcriptomic and validation experiments implicated JNK, p38 MAPK, and endoplasmic reticulum stress signaling, with CHOP induction contributing to the apoptotic response.²²¹

PMID 33981288: Experimental ACC cell models showed low or weak estrogen receptor expression overall, with NCI-H295R retaining greater ER-beta expression and tamoxifen sensitivity, while metastatic MUC-1 and ACC115m models were relatively resistant. In patient tissues, ER expression was low and progesterone receptor expression was higher, limiting enthusiasm for ER-directed clinical targeting.²²²

PMID 34027794: In ACC cell-line and database analyses, HOXA5 and AKR1B10 were downregulated and lower expression was associated with worse survival. In NCI-H295R cells, HOXA5 bound the AKR1B10 promoter, increased AKR1B10 expression, activated p53 and p21 signaling, reduced proliferation markers, and promoted apoptosis.²²³

PMID 34257605: This study optimized 3D culture methods for the H295R adrenocortical carcinoma cell line and found that extracellular matrix support with a matrigel-based scaffold produced viable spheroid models for about 7 days, with higher steroid production than monolayer culture. Standard serum-free spheroid induction was poorly tolerated by H295R cells, highlighting method-specific constraints in ACC modeling.⁷⁶

PMID 34439352: This preclinical study used both the classical NCI-H295R ACC cell line and the highly drug-resistant MUC-1 model to examine gemcitabine-cisplatin sensitivity and resistance mechanisms. It identifies ribonucleotide reductase signaling as a candidate vulnerability and highlights how resistant model systems may better inform translational drug development in ACC.⁶³

PMID 34567111: An in vitro ACC study using SW-13 and NCI-H295R cell lines found that salubrinal reduced viability and migration and increased apoptosis, with associated increases in p-PERK, p-eIF2α, and ATF4. The findings support PERK/eIF2α/ATF4 signaling as a candidate translational target in ACC.²²⁴

PMID 34572375: This in vitro ACC study compared components of the EDP-mitotane Italian protocol in NCI-H295R and SW13 cell lines, finding that mitotane plus etoposide and doxorubicin showed synergistic cytotoxicity similar to full EDP-M, while cisplatin-containing combinations were often antagonistic and altered steroidogenic gene expression unfavorably.⁷⁴

PMID 34624940: This short communication uses the NCI-H295R adrenocortical carcinoma cell line as an in vitro steroidogenic model to test iron exposure, reporting altered progesterone and testosterone output without clear cytotoxicity over 48 hours. The article emphasizes the utility of NCI-H295R for studying metal-related effects on steroidogenesis pathways.²²⁵

PMID 34726962: This translational study links low H19 expression in ACC with reduced autophagy-marker expression and reports that histone deacetylase inhibitors restored H19, activated autophagy-associated protein changes, and reduced viability in H295R monolayers and spheroids. The findings suggest autophagy reactivation as an investigational therapeutic concept.²²⁶

PMID 34771418: This review synthesizes in vitro evidence on mitotane action in ACC while emphasizing that major findings are strongly influenced by model selection and culture conditions. It highlights variability among H295-derived strains, uncertainty around SW13 as an ACC model, and the need for standardized, reproducible preclinical systems.⁵

PMID 34875044: This in vitro study used ACC cell lines and a patient-derived primary culture to test the CDK4/6 inhibitor ribociclib alone and with progesterone and mitotane. Ribociclib reduced viability and proliferation, induced predominantly apoptotic death with G2-phase accumulation, and showed enhanced cytotoxicity in combination settings.²²⁷

PMID 35261634: This in vitro study compared mitotane responses in an ACC cell line and melanoma cells, showing stronger sensitivity in ACC with reduced proliferation, increased DNA double-strand breaks, necrosis, and apoptosis, alongside transcriptomic changes affecting mitosis, DNA repair, angiogenesis, and ERK signaling.²²⁸

PMID 35322867: Using the NCI-H295R ACC cell line and TCGA-linked gene analysis, this study found that IFNγ enhances erastin-induced ferroptosis through JAK/STAT activation and suppression of SLC7A11, with SLC7A11 upregulation associated with poorer overall survival in ACC.²²⁹

PMID 35631574: This preclinical study identifies an H295R ACC cell subpopulation with Ptch1 overexpression and increased cell-surface localization that shows greater doxorubicin resistance, clonogenicity, migration, invasion, spheroid growth, tumorigenicity, and metastatic behavior. The findings support a persistent or stem-like resistant cell state as a potential driver of relapse and metastasis in ACC.⁴³

PMID 35661985: This review summarizes the NCI-H295R human adrenocortical carcinoma cell line as a widely used in vitro model for adrenal steroidogenesis research, endocrine disruptor screening, and some cancer therapy studies. It highlights the line’s origin, substrains, steroidogenic enzyme expression, hormone-production profile, and ultrastructural characterization.²

PMID 35745673: This in vitro study used H295R and SW-13 adrenocortical carcinoma cell lines to show that quercetin-rich onion fractions and purified quercetin reduced cell viability more strongly than mitotane at lower concentrations, with associated cell-cycle disruption, reduced Ki67, and apoptosis-related changes.²³⁰

PMID 35797592: This preclinical study uses mitotane-sensitive H295R and mitotane-resistant MUC-1 ACC cell models to show differing lipid droplet composition, with cholesteryl ester-rich versus triacylglycerol-rich phenotypes. It supports lipid droplet breakdown and lipolysis as an additional mechanism of mitotane cytotoxicity and a possible route to address resistance.⁷⁰

PMID 36145639: This preclinical in vitro study evaluated injectable mitotane nanocarriers in ACC 3D spheroids and found albumin-stabilized nanoparticles to be more stable and storable than liposomal formulations, with cytotoxic effects in NCI-H295R spheroids and relatively low toxicity in fibroblasts.²³¹

PMID 36184616: This preclinical study identifies CDK1 as a candidate therapeutic target in ACC, linking high CDK1 expression to worse outcomes and showing that CDK1 promotes proliferation, epithelial-mesenchymal transition, G2/M regulation, and ZBP1-dependent PANoptosis pathways. In ACC cell lines and xenografts, the CDK1 inhibitor cucurbitacin E showed dose-dependent antitumor activity and enhanced tumor control when combined with mitotane.⁴⁹

PMID 36478070: Using CRISPR/Cas9 NNT knockdown in H295R adrenocortical carcinoma cells, this study showed that impaired NNT increases oxidative stress, reduces mitochondrial mass and cholesterol lipid droplet features, alters steroidogenic enzyme expression, and decreases cortisol and aldosterone secretion. The work illustrates how ACC-derived cell models can define adrenal steroidogenic mechanisms relevant to human disease.²³²

PMID 36558937: In an H295R adrenocortical carcinoma cell line, the mitotane metabolite o,p’-DDE showed cytotoxicity similar to mitotane after 48 hours but appeared to inhibit apoptosis, lacked clear ferroptosis or necroptosis effects, promoted necrosis at higher concentrations, and altered steroidogenic CYP interactions and hormone secretion.²³³

PMID 36597898: An in silico repurposing screen identified candidate competitive inhibitors of MTHFR, a metabolic enzyme whose higher expression was associated with worse overall survival in ACC in TCGA-based analysis. Vilanterol emerged as the strongest modeled binder, supporting preclinical exploration of MTHFR-targeted strategies in ACC.²³⁴

PMID 36614027: This study describes a patient-derived SF1-positive human adrenocortical adenoma cell line from zona reticularis that can be induced by histone deacetylase inhibition to upregulate steroidogenic genes and activate TNF-alpha signaling. The model addresses limitations of relying on the late-stage H295R carcinoma line for studying adrenal differentiation and early adrenocortical transformation.²³⁵

PMID 36747748: This preprint describes a 3D hydrogel-based ACC model using NCI-H295R cells that retains ACC-associated marker expression and cortisol production, while showing lower chemotherapy sensitivity than 2D culture. The platform also measures matrix metalloproteinase activity and supports metastasis-on-a-chip invasion studies inhibited by MMP blockade.²³⁶

PMID 36845952: In the NCI-H295R ACC cell line, FNDC5 was reduced relative to normal tissue datasets, and its overexpression suppressed proliferation, migration, invasion, and epithelial-mesenchymal transition while promoting apoptosis. These effects were linked to interaction with AKR1B10 and modulation of AMPK/mTOR signaling, with AKR1B10 knockdown reversing the FNDC5 phenotype.²³⁷

PMID 36980669: Using the ACC cell line NCI-H295R and xenograft models, this study links vault complex regulation and exosomal vault RNA release to treatment responsiveness, with distinct autophagy marker changes under cytotoxic versus inflammation-related drug conditions. The findings are mechanistic and exploratory rather than practice-directing.²³⁸

PMID 37477142: This preclinical study found that the PLK1 inhibitor BI2536 reduced proliferation of ACC cell lines, induced cell-cycle arrest and apoptosis, and caused centrosome amplification with aberrant mitosis. The reported mechanism linked DNA damage to ATM-ERK signaling, supporting PLK1 inhibition as an investigational therapeutic strategy in ACC models.²³⁹

PMID 37540158: This study evaluates a hiPSC-based differentiation protocol using growth factors, forskolin, and HAC15-conditioned medium to generate adrenocortical-like cells as a potential ACC research model. The resulting cells instead showed transcriptomic features of endodermal and pancreatic-like progenitors, underscoring the difficulty of building functional adrenal/ACC cell models.²⁴⁰

PMID 37549779: This review summarizes in vitro findings from human adrenocortical carcinoma cell lines H295R and HAC15 showing that PFAS and PCB126 can increase CYP11B2 expression and aldosterone secretion, with ROS-dependent effects and potentiation of angiotensin II signaling. It uses ACC-derived models to study adrenal steroidogenic regulation rather than ACC disease behavior or treatment.²⁴¹

PMID 37726363: This study describes a hydrogel-based 3D ACC model using NCI-H295R cells that preserves ACC biomarker expression and cortisol production while showing lower sensitivity to mitotane and EDP-based chemotherapy than 2D culture. The platform also enables measurement of matrix metalloproteinase activity and invasion behavior in a metastasis-on-a-chip setting.⁷⁷

PMID 37906268: This correction preserves the original conclusion that ASXL1 knockdown in ACC cell lines reduces cellular fitness, including proliferation, colony formation, invasion, migration, and effects on cell cycle and apoptosis. The article contributes preclinical evidence linking ASXL1 to aggressive ACC behavior and EDP chemoresistance research.²⁴²

PMID 38069023: This preclinical study shows that albumin and human serum bind mitotane and markedly suppress its apparent cytotoxic activity in ACC cell models, altering dose-response assessment. The findings highlight culture-condition confounding in mitotane experiments and support standardization of in vitro ACC model systems.⁶

PMID 38276253: An in vitro study using the H295R adrenocortical carcinoma cell line found that BPA and related bisphenols altered membrane integrity, mitochondrial activity, intracellular cholesterol, and steroid hormone secretion in a dose-dependent biphasic pattern. The work highlights H295R as a translational model for studying environmental endocrine disruptors and steroidogenesis.²⁴³

PMID 38289290: This review frames bioengineered 3D endocrine tumor models, including ACC spheroids, organoids, and tumor-on-a-chip systems, as complementary to 2D culture and animal models for mechanistic studies and drug testing. For ACC, it notes use of NCI-H295R spheroids to evaluate mitotane micelle delivery and highlights broader translational limitations of current biomaterial platforms.¹¹

PMID 38580769: This study describes a 3D mixed-cell Adrenoid model combining ACC H295R cells with pheochromocytoma MTT cells to reproduce adrenal cortex-medulla architecture and dual endocrine function. The model showed close cell-cell interactions, enhanced functional ultrastructural features, and measurable steroid and catecholamine production, supporting its use for studying adrenal crosstalk and drug testing.⁷⁸

PMID 39424480: This preclinical study identifies SLC7A11 and the linked lncRNA OIP5-AS1 as overexpressed in ACC with adverse survival associations, and shows that sulfasalazine suppresses viability, migration, invasion, sphere formation, and ferroptosis-related redox pathways in ACC cell lines.²⁴⁴

PMID 39600276: This preclinical study tested melatonin in ACC cell lines and a SW-13 xenograft model, finding reduced proliferation, migration, and invasion with increased apoptosis. The reported mechanism involved decreased endoplasmic reticulum stress markers and reduced NF-KB/MAPK pathway signaling, suggesting a possible future adjuvant strategy.⁶⁰

PMID 39656817: This study developed type I collagen-based 3D ACC cultures using H295R, HAC15, and MUC-1 cells that remained viable, preserved key steroidogenic features in selected lines, showed necrotic core formation, and exhibited greater mitotane resistance than monolayer models. The work supports a more tumor-microenvironment-relevant, animal-sparing platform for ACC drug testing.⁷⁹

PMID 39965324: In H295R adrenocortical carcinoma cells studied under serum-free conditions to avoid known confounders, mitotane induced early transcriptional activation of the ATF4/ATF3 axis consistent with endoplasmic reticulum stress and downregulated steroidogenesis genes including STAR, CYP11A1, CYP21A2, and HSD3B2. The authors propose these altered pathways as candidate functional biomarkers or therapeutic targets for future ACC research.²⁴⁵

PMID 40229247: This preclinical study in ACC cell lines and in vivo models found that EZH2 inhibition induces a compensatory anti-ferroptosis program marked by upregulation of the SLC7A11/glutathione/GPX4 axis. Pharmacologic GPX4 inhibition synergized with low-dose EZH2 inhibitors to suppress ACC growth, suggesting a co-targetable vulnerability.⁵²

PMID 40645443: This review describes adrenocortical organoids and 3D spheroid systems as emerging platforms for adrenal research, noting that ACC cell lines remain widely used but are limited by their tumorigenic origin. It highlights organoid and stem cell-based models as tools to study human adrenal biology and support drug screening and translational research in ACC.¹²

PMID 40904648: A multicellular in vitro ACC model showed concentration- and time-dependent uptake of dopamine-coated iron oxide nanoparticles by H295R, HAC-15, and MUC-1 cells, with preserved viability and stimulated steroidogenesis at 10 µg/mL. Endothelial cells and primary monocytes also avidly internalized nanoparticles, limiting tumor-cell delivery and underscoring a translational barrier for ACC theranostic targeting.²⁴⁶

PMID 41106571: This preclinical study evaluated the Wee1 inhibitor AZD1775 in ACC cell models, patient-derived cells, and NCI-H295R xenografts. AZD1775 showed antitumor activity comparable to EDP-M in vivo, while in vitro combination treatment enhanced antiproliferative effects, reduced cortisol secretion, and explored Myt1-mediated resistance biology.²⁴⁷

PMID 41124865: This preclinical study identifies an autocrine FGF/FGFR signaling loop in ACC cell lines and tumor datasets, and shows that FGFR inhibition or FGF trapping suppresses ACC growth in vitro and in xenografts. Erdafitinib reduced proliferation, survival, and angiogenesis, supporting FGF/FGFR as a translational therapeutic target.⁵⁰

PMID 41136313: This preclinical study evaluates fingolimod as a repurposed therapy for metastatic ACC by targeting sphingolipid metabolism. In ACC cell lines and extracellular-matrix invasion models, fingolimod reduced viability, altered signaling and steroidogenic programs, synergized with mitotane, and markedly inhibited liver and lung matrix-driven migration and invasion in vitro.²⁴⁸

PMID 41140568: An in vitro study using the NCI-H295R adrenocortical carcinoma cell line found that fenugreek microgreen extract reduced mitochondrial activity, membrane integrity, lysosomal activity, and reactive oxygen species at higher doses after 48 hours, while lower doses increased steroid hormone release and higher doses decreased progesterone and testosterone secretion.²⁴⁹

PMID 41256360: This preclinical study identifies glutamine metabolism, particularly glutamine-fueled de novo nucleotide biosynthesis, as a conserved metabolic vulnerability in ACC across human datasets, mouse models, and cell lines. Glutamine antagonists DON and the prodrug JHU-083 produced strong antitumor effects in vitro and in vivo, with additional synergy seen when DNA damage response inhibition was combined with glutamine blockade.⁵¹

PMID 41472891: Using the NCI-H295S ACC cell line, this study isolated mitochondria-associated membranes and showed that mitotane alters their protein and lipid composition, including reduced ubiquinone Q10 and heme B and recruitment of GRIPAP1. The findings support a translational model linking mitotane-induced adrenal cell death to ER-mitochondria contact sites beyond SOAT1 inhibition alone.²⁵⁰

PMID 41542511: This preclinical study identifies MMP-14 as a potential ACC dependency linked to DNA damage repair, showing that genetic silencing or hemopexin-domain inhibition reduced viability in NCI-H295R cells and patient-derived organoids while impairing NHEJ and increasing DNA damage markers.²⁵¹

PMID 41649571: Using histologically normal adrenal tissue from heterozygous Men1 mice as an early tumorigenesis model, the study identified upregulation of ACLY and FASN and showed that pharmacologic inhibition of these lipid-synthesis enzymes reduced proliferation in H295R adrenocortical cells. High ACLY or FASN expression in TCGA ACC data was also associated with worse survival.²⁵²

PMID 41671730: This preclinical study used ACC cell lines, patient-derived primary cultures, and SF1-positive 3D spheroid models with hormone secretion profiling to test progesterone plus EDP-M. Progesterone at higher concentrations increased EDP-M cytotoxicity, while 3D models often required higher EDP-M exposure, highlighting their translational relevance.⁷⁵

PMID 41747473: This preclinical study in the H295R ACC cell line found that celastrol induced apoptosis in both 2D cultures and 3D spheroid models, including disruption of pre-formed spheroids. Mechanistic data linked its activity to endoplasmic reticulum stress and oxidative stress, supporting ER-stress targeting as a translational research direction in ACC.²⁵³

PMID 11683386: A cell-biology study using SW-13 showed very low lamin A expression with mislocalization of lamin C and emerin, reversible by lamin A re-expression. The finding is indirectly relevant to ACC because it further cautions that SW-13 has atypical biology beyond limited steroidogenesis.¹⁹

PMID 16840326: A virology study used SW-13 as a BRG1/BRM1-deficient adrenal carcinoma background and found that Tax- and TNF-α-responsive integrated reporter activation remained intact without these SWI/SNF ATPases. For ACC modeling, the relevance is indirect but it adds useful context that SW-13 carries atypical chromatin-remodeling biology that may affect transcription-focused experiments.²⁰

PMID 22692904: An endocrine-tumor study using murine Y1 adrenocortical carcinoma cells found that secretin receptor expression can promote proliferation partly via PI3K/AKT signaling and may modulate sensitivity to PI3K inhibitors. Its relevance to ACC is indirect but supports receptor-linked pathway dependence as a possible drug-screening concept in adrenal tumor models.²⁵⁴

PMID 230482: A 1979 biochemical study solubilized the LDL receptor from bovine adrenal cortical membranes and showed specific, calcium-dependent, protease-sensitive LDL binding with suppression by sterols in cultured cells. The article is indirectly relevant to ACC because it supports the adrenal cholesterol-uptake biology that underlies later steroidogenesis work in ACC models.²⁵⁵

PMID 24666275: An H295R study in the autoimmune Addison’s disease setting found that type I and III interferons induced cytotoxicity, enhanced chemokine secretion, increased HLA class I expression, and upregulated 21-hydroxylase. For this note, the article is most relevant as evidence that H295R can model immunoendocrine responses of adrenocortical cells, although not ACC treatment response directly.²⁵⁶

PMID 25470028: A perinatal adrenal study used NCI-H295A cells as a human steroidogenic model and found that transition from hypoxia to normoxia increased STAR, HSD3B2, and CYP17A1 expression after 2 days. Although not an ACC-focused therapeutic study, it extends the note’s endocrine-signaling section by identifying oxygen tension as an experimental determinant of steroidogenic state in H295-derived cells.²⁵⁷

PMID 25836666: In HAC15 cells, angiotensin II-induced aldosterone production and CYP11B2 expression were reduced by calpain inhibition and calpain-10 knockdown, while calpain-10 overexpression increased the response. This extends endocrine use of HAC15 by identifying atypical calpain-10 as a candidate mediator of aldosterone synthesis in an ACC-derived model, with indirect rather than tumor-specific relevance.²⁵⁸

PMID 2881352: A 1987 biochemical study in rat adrenocortical carcinoma purified a 180-kD protein with both atrial natriuretic factor receptor and particulate guanylate cyclase activities, supporting cyclic GMP-linked peptide signaling in adrenal steroidogenic cells. Its relevance to ACC is indirect and historical, but it broadens the endocrine-signaling context of adrenocortical tumor models.²⁵⁹

PMID 2898940: A 1988 biochemical study in rat and mouse testes used antibody-based characterization to identify an ANF-responsive membrane guanylate cyclase matching the previously described 180-kDa enzyme from rat adrenocortical carcinoma. For this note, it mainly confirms the older historical literature linking natriuretic peptide/cyclic-GMP signaling to steroidogenic transduction in adrenocortical tumor systems rather than adding direct evidence about modern human ACC drug-screening models.²⁶⁰

PMID 29272331: A toxicology study proposed purified rat Leydig cells as a complementary assay to high-throughput H295R screening because H295R has limited sensitivity for gonadal testosterone perturbation. The finding refines interpretation of H295R as a broad steroidogenesis model rather than a uniformly sensitive detector of all androgen-disrupting effects.²⁶¹

PMID 31676319: A 2019 high-throughput H295R analysis proposed a mean Mahalanobis distance approach to compress 11-hormone response patterns into a single prioritization metric for 656 chemicals, with low reported false-positive rates and useful concordance for aromatase inhibitors. It mainly strengthens the note’s endocrine-screening coverage by adding a statistical framework for ranking steroidogenic perturbation while accounting for cytotoxicity context.²⁶²

PMID 31900481: A high-throughput H295R analysis of 656 chemicals supported use of a mean Mahalanobis distance metric to summarize 11-hormone perturbation patterns, with low estimated false-positive rates and sensitivity to modest fold changes. The study also emphasized combining steroidogenic activity with cytotoxicity data for prioritization, mainly in endocrine hazard screening rather than ACC therapy research.²⁶³

PMID 34370692: A 2021 endocrinology study used H295R and HAC15 cells, together with neonatal and mouse data, to identify adrenomedullin as a potential inhibitor of cortisol secretion and CYP11B1 expression. In this note, it extends the endocrine-signaling section by adding an inhibitory peptide regulator of glucocorticoid output in steroidogenic ACC models.²⁶⁴

PMID 34896276: A 2022 H295R study found that cis-bifenthrin suppressed cortisol and aldosterone biosynthesis and was associated with reduced intracellular cAMP, lower StAR protein, and downregulation of multiple steroidogenic genes. The paper is most relevant as endocrine-toxicology evidence extending the note’s discussion of H295R as a mechanistic model for steroidogenic regulation rather than as a tumor-therapy study.²⁶⁵

PMID 34957562: A 2022 mechanistic study in HAC15 revised interpretation of cytosolic-domain KCNJ5/GIRK4 mutations linked to primary aldosteronism, arguing that several variants act mainly through loss of channel function rather than loss of K+ selectivity. In HAC15, GIRK4 opening or wild-type GIRK1/4 overexpression reduced aldosterone secretion, adding an electrophysiologic layer to use of this model for aldosterone regulation.¹⁸

PMID 35526370: A 2022 cell-biology study reported TASK1, TASK3, and p11 expression in H295R cells, with evidence for heteromeric TASK1-3 channels and angiotensin II-associated redistribution toward the cytoplasm. Its relevance to ACC is mainly mechanistic, adding membrane-potential and channel-trafficking context to steroidogenic signaling studies in H295R rather than direct therapeutic insight.²⁶⁶

PMID 35987080: A 2022 H295R endocrine-toxicology study found that fluorene-9-bisphenol suppressed multiple steroid hormones and steroidogenic genes, with associated reductions in adenylate cyclase activity, cAMP, PKA activity, and SF-1 expression. This extends the note’s discussion of H295R as a model for cAMP-linked inhibition of steroidogenesis, mainly in a toxicologic rather than tumor-therapeutic context.²⁶⁷

PMID 37758070: An OECD-guideline-style H295R study found that homosalate decreased testosterone production and that co-exposure with avobenzone enhanced anti-androgenic effects, with parallel endocrine-disrupting signals in male zebrafish. The article extends the note’s toxicology discussion by adding mixture-dependent steroidogenic suppression rather than single-agent effects alone.²⁶⁸

PMID 39936308: A chemogenetically engineered H295R-S2 model was used to reproduce KCNJ5-like sodium entry on demand, linking Na+-dependent depolarization and Ca2+ influx to CYP11B2 induction and aldosterone biosynthesis. The study also found reduced proliferation and increased apoptosis, suggesting that autonomous aldosterone production and growth may be dissociable in this adrenal-cell context.²⁶⁹

PMID 41544797: A 2026 study showed that T3 alters androgen output in H295R cells, decreasing DHEA/DHEAS while modestly increasing androstenedione and testosterone alongside changes in HSD3B2, AKR1C3, and CYP17A1 expression. This extends the note’s endocrine-signaling section by adding thyroid hormone as a regulator of steroidogenic flux in H295R, with indirect relevance to ACC.²⁷⁰

PMID 6896004: A 1982 rodent adrenal study showed that pregnenolone formation from exogenous sterols depended partly on sterol side-chain structure and apparent access to mitochondrial side-chain cleavage machinery, not just intrinsic enzyme compatibility. Although indirect for human ACC, it extends the note’s cholesterol-handling discussion by highlighting substrate-delivery and membrane-transport effects on steroidogenesis.²⁷¹

PMID 10746939: A toxicology study in H295R found that atrazine, simazine, and propazine dose-dependently induced aromatase (CYP19) activity and CYP19 mRNA, with a pattern resembling cAMP/PKA-mediated stimulation and no clear cytotoxicity at tested concentrations. This mainly extends the note’s discussion of H295R as an endocrine-screening platform by adding enzyme induction of aromatase as a specific mechanism.²⁷²

PMID 11168353: A 2001 promoter study used H295R to show cell-type-specific activation of the rat Pref-1 gene through a proximal Egr/GC-box-containing element, with evidence that Sp1/3, Egr factors, and possibly another unidentified factor contributed to promoter activity. Although indirect to ACC therapeutics, it extends the note’s treatment of H295R by highlighting retained adrenal-context transcriptional regulation in reporter assays.²⁷³

PMID 11294972: An early H295R toxicology study found differential CYP responses to TCDD and diindolylmethane: TCDD induced CYP1A1/1B1 but not CYP19, whereas DIM induced CYP1A1, CYP1B1, and CYP19 with increased aromatase activity. This extends the note’s endocrine-toxicology discussion by showing that H295R can resolve chemically distinct induction patterns, not just uniform steroidogenic disruption.²⁷⁴

PMID 12127262: A 2002 H295R study showed that pesticides can both induce and inhibit aromatase, with vinclozolin increasing CYP19 activity and mRNA in parallel with higher cAMP, while several fungicides directly inhibited aromatase and some other apparent suppressive effects tracked mainly with cytotoxicity.²⁷⁵

PMID 12943994: A 2003 H295R study found that angiotensin II transiently activates phospholipase D, and that phospholipase D-derived lipid signals are required for maximal aldosterone secretion. It also suggested opposing regulation of this pathway by PKC and constitutive PI3K/Akt signaling, extending the note’s discussion of angiotensin II-responsive steroidogenic circuitry in H295R.²⁷⁶

PMID 14230367: A 1964 rat study examined interactions between 5-fluorouracil, corticosteroids, and adrenal responses in animals bearing transplanted non-ACC tumors. Its relevance to ACC is indirect, but it provides historical context for later interest in how endocrine state may modify interpretation of cancer-treatment experiments involving adrenal systems.²⁷⁷

PMID 14656209: A 2003 pilot study used H295R to test estrogen-receptor-directed daunomycin conjugates built on carboxy-isoflavone carriers. The conjugates were more potent than free daunomycin at low nanomolar concentrations, suggesting a proof-of-concept affinity-targeting strategy rather than established ACC therapy.²⁷⁸

PMID 1492929: A 1992 virology study reported that cultured human fetal adrenal cells and, in a strain-dependent manner, SW-13 cells could support low-level HIV infection without detectable CD4 expression. Infection was most apparent after coculture with peripheral blood mononuclear cells and did not appear to disrupt measured steroidogenesis in the adrenal cultures.²⁷⁹

PMID 15319488: A 2004 H295R study showed that natural and synthetic flavonoids modulate aromatase bidirectionally, with structure-dependent inhibition or induction of CYP19 activity. Induction by compounds such as quercetin and genistein was associated with increased cAMP and promoter-specific CYP19 transcripts, extending H295R endocrine-toxicology use beyond simple aromatase induction screens.²⁸⁰

PMID 15589976: A 2005 toxicology study found that several methyl sulfonyl PCB metabolites reduced aromatase activity in H295R cells without lowering aromatase mRNA, consistent with catalytic inhibition rather than transcriptional suppression. This extends the note’s aromatase section by showing that H295R can model both induction and direct enzymatic inhibition in endocrine screening.²⁸¹

PMID 15884376: A 2005 evaluation study developed molecular beacon-based quantitative RT-PCR in H295R to profile 11 steroidogenic genes and showed that chemicals with similar modes of action produced similar expression signatures. This extends the note’s coverage of H295R from hormone-based endocrine screening to transcript-level mechanistic profiling, mainly in toxicology rather than ACC therapy research.²⁸²

PMID 15907334: A 2005 H295R assay study found that bisphenol A and several related diphenylalkanes did not directly inhibit aromatase/CYP19 activity up to 100 µM, despite estrogenic or anti-estrogenic effects observed in parallel fish-hepatocyte experiments. This confirms the usefulness of H295R for distinguishing direct aromatase inhibition from other endocrine mechanisms in toxicology-focused screening.²⁸³

PMID 16177243: A 2005 H295R study found structure-dependent bidirectional modulation of aromatase by brominated flame retardants, with 2,4,6-tribromophenol inducing CYP19 activity and several PBDE metabolites inhibiting it. The report also noted that some apparent inhibition coincided with cytotoxicity, reinforcing the need for viability context in H295R aromatase assays.²⁸⁴

PMID 1625311: A 1992 microbiology study used the mouse adrenocortical tumor line Y1 as a sensitive assay for Campylobacter enterotoxin, with toxin-associated cell rounding neutralized by anti-LT serum. Its relevance to ACC is indirect, but it highlights how adrenocortical tumor cells have long been used as morphology-based bioassay systems and how such readouts can be cell-type- and assay-condition-dependent.²⁸⁵

PMID 16375936: A reproductive-toxicology study of prochloraz used H295R as an in vitro correlate for in vivo fetal steroidogenic disruption, finding reduced testosterone and increased progesterone. It extends the pesticide literature in this note by showing that H295R can model antiandrogenic effects likely involving steroidogenic blockade beyond aromatase alone.²⁸⁶

PMID 16650473: A 2006 pilot study applied the H295R steroidogenesis qPCR assay to complex sediment extracts rather than single compounds, finding marked CYP11B2 induction with reduced 3BHSD2 and CYP21 at non-cytotoxic doses. This extends the note’s screening discussion by showing that H295R gene-expression profiling can be used for mixture-level endocrine-disruption assessment, albeit indirectly relevant to ACC.²⁸⁷

PMID 1675760: This 1991 follow-up study confirmed that the 180-kDa ANF-dependent membrane guanylate cyclase first identified in rat adrenocortical carcinoma was bifunctional and also present in non-tumor tissues, supporting interpretation of the earlier ACC finding as part of a broader natriuretic-peptide/cGMP signaling system.²⁸⁸

PMID 16962624: This study standardized an H295R hormone-production assay measuring progesterone/pregnenolone, testosterone, and estradiol and showed that different reference compounds generated distinct steroid profiles consistent with known modes of action. It strengthens the note’s discussion of H295R as an endocrine-screening platform while remaining only indirectly relevant to ACC treatment modeling.²⁸⁹

PMID 17080404: This study compared steroidogenic gene-expression patterns in untreated and forskolin-stimulated H295R cells with human adrenal gland RNA, finding that forskolin-conditioned cells more closely approximated the adrenal transcript profile. It also showed that lindane suppressed cortisol, reduced selected steroidogenic transcripts, and inhibited StAR promoter activity, supporting H295R as a mechanistic adrenotoxicity model.²⁹⁰

PMID 17447562: Gene-expression profiling in H295R showed that several brominated flame retardants and brominated dioxin/furan compounds altered multiple steroidogenic transcripts without overt cytotoxicity, with especially strong induction of 3βHSD2. This extends the note’s endocrine-screening coverage by adding brominated contaminants as another class assessable through multigene H295R readouts.²⁹¹

PMID 17574328: A 2007 H295R toxicology study reported that MEHP suppresses aromatase activity and CYP19 transcription while rapidly inducing NR4A family genes, especially Nur77, which in turn repressed forskolin-responsive CYP19 promoters. It extends the note’s aromatase section by adding a promoter-level mechanism for chemical suppression of CYP19 in H295R beyond direct enzyme inhibition or generic transcriptional change.²⁹²

PMID 17822730: A 2007 H295R study examined 18 pharmaceuticals and selected binary mixtures using qRT-PCR of five steroidogenic genes together with estradiol, testosterone, and progesterone measurements. It found compound-specific and mixture-specific changes in steroidogenic gene expression and hormone output, extending H295R’s role as a mechanistic endocrine-screening platform rather than a direct ACC treatment model.²⁹³

PMID 18022659: Human placental microsome experiments showed that a broad range of hydroxylated PBDEs, but not matched methoxylated PBDEs, directly inhibited aromatase with low-micromolar potency, with mixed-type inhibition documented for selected congeners. Although not performed in ACC models, the study supports the note’s H295R-based discussion of structure-dependent catalytic aromatase inhibition by brominated flame-retardant metabolites.²⁹⁴

PMID 18040891: A 2007 study in mouse Y1 adrenocortical cells found that dexamethasone repressed cAMP-stimulated StAR expression and progesterone production, with accompanying reduction of histone H3 acetylation at the StAR promoter. Its relevance to ACC is indirect, but it extends the note’s treatment of older adrenocortical tumor models beyond morphology-based assays to chromatin-linked steroidogenic regulation.²⁹⁵

PMID 18248924: In H295R cells, 20 PBDE metabolites altered steroidogenesis across transcript, enzyme, and hormone endpoints, with CYP11B2 appearing particularly sensitive and with no consistent one-to-one relationship between CYP19 mRNA, aromatase activity, and estradiol output. The study extends prior PBDE-related toxicology context by showing multilevel and structurally heterogeneous effects rather than a uniform aromatase-centered pattern.²⁹⁶

PMID 18313098: A 2008 H295R endocrine-toxicology study found that PBDE metabolites, PBDE mixtures, and TBBPA caused compound-specific, mostly non-cytotoxic changes in multiple steroidogenic genes, with stronger effects from hydroxylated than methoxylated PBDEs. Some compounds increased aromatase activity, but testosterone and estradiol concentrations were not significantly changed, emphasizing incomplete concordance across transcript, enzyme, and hormone readouts.²⁹⁷

PMID 18639541: A 2008 H295R study of synthetic lactone derivatives found both competitive aromatase inhibitors and cAMP-associated inducers of pII promoter-specific CYP19 transcripts, extending prior structure-activity work on bidirectional CYP19 modulation in this ACC-derived endocrine-screening model.²⁹⁸

PMID 18675312: A 2008 promoter study found that cAMP downregulated hepatic lipase expression in HepG2 hepatoma cells but not in H295R adrenocortical cells, with associated differences in C/EBPβ regulation. This indirectly refines interpretation of lipoprotein-handling biology in H295R by emphasizing adrenal-versus-hepatic specificity in cAMP-responsive transcriptional control.²⁹⁹

PMID 19095052: In H295R cells, two hydroxylated PBDE metabolites caused dose-dependent cytotoxicity at micromolar concentrations, with 2-OH-BDE85 more toxic than 2-OH-BDE47, but did not produce detectable DNA damage or a clear AHR-like signature. Microarray profiling instead implicated endoplasmic-reticulum stress and unfolded-protein-response pathways, extending H295R endocrine-toxicology use into broader cellular stress-response profiling.³⁰⁰

PMID 19168055: A 2009 H295R study found that azelnidipine inhibited angiotensin II- and KCl-stimulated aldosterone production and reduced CYP11B1/CYP11B2 expression, with stronger effects than nifedipine and similar potency to efonidipine. This extends the note’s treatment of H295R-based drug screening by adding a clinically used calcium-channel blocker as a steroidogenesis-directed pharmacologic probe rather than a tumor-directed ACC therapeutic candidate.³⁰¹

PMID 19530175: A desmin-assembly study used SW-13 as an intermediate-filament-deficient cellular background and observed nuclear deposition of a truncated desmin fragment without overt nuclear morphological change. For this note, the article mainly reinforces that SW-13 has unusual structural cell-biology properties that can influence interpretation outside classic steroidogenic ACC modeling.²¹

PMID 19676042: A 2010 study reported that H295R, described as naturally expressing P-gp, was relatively resistant to ansamycin Hsp90 inhibitors such as 17-AAG, while the synthetic Hsp90 inhibitor BIIB021 retained activity and was superior in vitro and in vivo. The article extends ACC resistance-modeling discussion by linking Hsp90 inhibitor performance to efflux-pump susceptibility rather than to target class alone.³⁰²

PMID 20063534: A 2008 study used NCI-H295R cells to test serum from patients with peritoneal carcinomatosis and intestinal obstruction, finding reduced AKT-pathway phosphorylation together with increased cortisol output. This is only indirectly relevant to ACC, but it extends the note by showing H295R can function as a responsive adrenal bioassay for patient-derived systemic factors, not only as a tumor-intrinsic screening model.³⁰³

PMID 20087668: A 2010 H295R aromatase study showed that direct catalytic assays and indirect post-exposure assays can diverge because compensatory regulation may increase apparent aromatase activity after inhibitor exposure. It concluded that combining direct and indirect measurements better predicts estradiol-related effects than either endpoint alone in isolation.³⁰⁴

PMID 20189567: Mouse and H295R experiments linked HDL-associated PON1 to adrenal steroidogenesis by showing reduced HDL binding, lower cholesteryl ester supply, and decreased SR-BI expression under PON1 deficiency, with partial rescue after PON1 repletion.³⁰⁵

PMID 20236711: An ecotoxicology study used H295R to show that ibuprofen increased estradiol and aromatase activity while decreasing testosterone under non-cytotoxic conditions, then linked these findings to reproductive effects in aquatic species. This extends the note’s discussion of H295R as a pharmaceutical endocrine-screening platform rather than informing ACC treatment directly.³⁰⁶

PMID 20615422: In H295R cells, 8:2 fluorotelomer alcohol decreased several adrenal steroid products and downregulated key steroidogenic enzymes in association with reduced cellular cAMP and lower adenylate cyclase activity. The study supports the existing theme that H295R can detect chemically induced suppression of steroidogenesis through disruption of AC/cAMP-linked signaling rather than overt cytotoxicity.³⁰⁷

PMID 21129436: A 2011 stem-cell engineering study showed that SF-1, and in mesenchymal cells LRH-1, can drive mesenchymal or embryonic stem-cell-derived intermediates toward adrenocortical-like steroidogenic states with corticosterone production. Although not an ACC study, it extends the model landscape by identifying a nearby non-tumor platform for steroidogenic-cell generation and comparison.³⁰⁸

PMID 21296122: In H295R cells, pentachlorophenol and 2,4,6-trichlorophenol decreased testosterone and estradiol output, downregulated several steroidogenic genes, and lowered cellular cAMP, supporting cAMP-linked suppression of steroidogenesis in an endocrine-toxicology context.³⁰⁹

PMID 21703734: A 2011 medicinal-chemistry study used H295R to evaluate letrozole-based triazole analogues, finding structure-dependent aromatase inhibition and additional antiproliferative effects for selected compounds. It extends the note’s treatment-focused section by showing that H295R can support early aromatase-inhibitor lead optimization as well as broader mechanistic screening.³¹⁰

PMID 21907227: A 2011 H295R SILAC proteomics study found that non-cytotoxic zearalenone exposure altered a small set of proteins and implicated oxidative phosphorylation and mitochondrial dysfunction pathways. It extends the note’s screening discussion from gene-expression and hormone outputs to proteome-level readouts in H295R endocrine toxicology.³¹¹

PMID 21932247: Fractionated sediment extracts from one estuary strongly increased CYP19 expression and estrogen output in H295R cells, with principal-component analysis and H89 co-exposure supporting activation of a PKA-linked steroidogenic mechanism. This extends H295R endocrine-screening use from defined chemicals to mechanistically probed complex environmental samples.³¹²

PMID 22155427: A 2012 Aquatic Toxicology study used H295R cells to show that 2,4-dichlorophenol reduced estradiol and altered multiple steroidogenic transcripts without overt short-term cytotoxicity, then compared these findings with zebrafish endocrine and reproductive effects. This extends the note’s discussion of H295R as a mechanistic endocrine-screening platform that can be interpreted alongside in vivo outcomes rather than as an ACC-specific tumor model.³¹³

PMID 22331364: H295R experiments suggest that VLDL, especially native and glycoxidized forms, can stimulate aldosterone production through increased StAR and CYP11B2 expression with involvement of SR-BI, PKA, ERK1/2, and JAK2 signaling. This extends the note’s cholesterol-handling discussion from LDL and HDL to VLDL as another lipoprotein input shaping steroidogenic output in ACC-derived adrenal models.³¹⁴

PMID 22331379: In NCI-H295R cells, VSNL1 promoted CYP11B2 expression and aldosterone secretion while protecting against calcium-induced apoptosis, including apoptosis associated with mutant KCNJ5 G151R expression. This extends KCNJ5-related use of H295R by adding a calcium-sensor-mediated survival mechanism alongside aldosterone-regulatory signaling.³¹⁵

PMID 22420007: A 2012 ACC cell-line study found that sirolimus and temsirolimus inhibited proliferation across H295, HAC15, and SW-13, with sirolimus also decreasing cortisol output in steroidogenic models. It further suggested that response may vary by model and that combined mTOR and IGF2 targeting could outperform mTOR inhibition alone in selected ACC contexts.³¹⁶

PMID 22447911: A 2012 Endocrinology commentary summarized evidence from HAC15 and related adrenal models indicating that KCNJ5 mutations directly promote depolarization-, calcium-, and CYP11B2-linked aldosterone excess, but may not consistently increase proliferation. This extends the note’s KCNJ5 section by highlighting a dissociation between aldosterone overproduction and growth effects in mutation-based adrenal modeling.³¹⁷

PMID 2273942: A 1990 biochemical study used SW-13 soft-agar colony formation to purify and characterize a bovine kidney-derived epithelial transforming growth factor activity, including a 13-15 kDa biologically active form thought to represent a truncated species. This is only indirectly relevant to ACC, but it adds historical context for SW-13 as a growth-factor-responsive bioassay line rather than a specifically adrenal or steroidogenic model.³¹⁸

PMID 22982764: A 2012 H295R endocrine-screening study of the trichothecene mycotoxins DON, T-2, and HT-2 found reduced hormone output together with broad steroidogenic-gene perturbation, while also showing that declining viability contributed to the largest hormonal effects at higher concentrations. Reporter assays did not support direct steroid-receptor agonism or antagonism, supporting a predominantly steroidogenesis- and toxicity-linked interpretation rather than receptor-mediated endocrine disruption.³¹⁹

PMID 22989785: A 2013 study showed that NCI-H295R cells can mount a TLR3-dependent innate immune response, with poly(I:C) inducing CXCL10 and synergizing with IFN-γ and TNF-α through NF-κB and STAT1. This extends the note’s immunoendocrine framing by adding viral-pattern recognition and chemokine production as H295R-readout domains that are relevant mainly indirectly to ACC.³²⁰

PMID 23102636: Kinome-array work in H295R and SW-13 suggested that sunitinib suppresses intended kinase targets while inducing compensatory signaling, especially ERK1/2. Combined sunitinib and PD98059 showed stronger antiproliferative effects than either agent alone, supporting combination-based resistance modeling in ACC cell systems.³²¹

PMID 23123129: A veterinary pathology series described spontaneously arising metastatic bovine adrenocortical carcinomas and proposed that bovine tumor cultures may offer a comparative resource for studying human adrenal neoplasia. Its relevance to ACC cell-line work is indirect but extends the note’s discussion of broader model diversification beyond standard human platforms.³²²

PMID 23245310: A 2013 endocrine-toxicology study found that HgCl2 exposure in NCI-H295R cells caused dose-dependent decreases in testosterone and progesterone over 48 hours, with some hormonal suppression observed at concentrations below clear cytotoxicity. This confirms H295R’s utility as a hormone-output screening model for steroidogenesis-disrupting chemicals, while emphasizing parallel viability assessment.³²³

PMID 23561572: A 2013 Chemosphere study used H295R cells to test alkylphenols, naphthenic acids, and the polar fraction of produced water, finding increased estradiol and progesterone, reduced testosterone with some exposures, and exposure-specific steroidogenic gene changes with consistent CYP1A1 induction. It mainly extends the note’s endocrine-screening section by adding petroleum-related complex mixtures as another H295R profiling use case.³²⁴

PMID 23948237: A 2013 analytical paper developed a solid-phase extraction LC-MS/MS method for simultaneous measurement of cholesterol and five key steroid hormones in H295R incubation medium. It mainly extends the note’s assay-method literature by showing how broader, mass-spectrometric steroid panels can support more specific mechanistic interpretation in H295R endocrine screening.³²⁵

PMID 24420545: In a primary aldosteronism cohort, rare germline KCNJ5 variants outside the selectivity filter and the coding SNP E282Q showed functional effects in H295R, including increased angiotensin II-stimulated aldosterone release for selected variants. This extends the note’s KCNJ5 section by showing that H295R can model variant-specific channel dysfunction beyond the canonical selectivity-filter mutations.³²⁶

PMID 24754389: A 2014 H295R study found congener-specific steroidogenic changes after exposure to PCB 118, 153, and 126, with PCB 126 showing the strongest overall effects. Parallel 2D proteomics suggested associated alterations in protein synthesis, stress-response, and apoptosis-related pathways, extending H295R screening beyond hormone and transcript endpoints.³²⁷

PMID 25324206: This 2015 toxicology study extends the H295R endocrine-screening literature from aromatase-centered endpoints to antiandrogenic mechanisms involving CYP17 and SRD5A1. In H295R, benomyl and prochloraz reduced CYP17-related androgen-synthetic readouts, while androgen-receptor-linked responses differed from those in LNCaP prostate cells, underscoring cell-type-specific mechanism assignment.³²⁸

PMID 25400120: A 2014 study used H295R to show that ATF3 is a transient angiotensin II- and forskolin-responsive transcript, with angiotensin II induction reduced by Src and CaMKII inhibition, suggesting a role in aldosterone-related signaling. Human adrenal tissue data localized ATF3 to zona glomerulosa and showed higher ATF3 mRNA in aldosterone-producing than cortisol-producing adenomas, making the ACC relevance indirect but mechanistically informative for H295R aldosterone modeling.³²⁹

PMID 2547152: A 1989 comparative purification study used rat adrenocortical carcinoma as a source of α2-adrenergic receptors and reported coupling to guanylate cyclase and adenylate cyclase, while showing that the purified rat and human platelet receptors shared broad biochemical features but differed in peptide maps. This is only indirectly relevant to ACC drug-screening models, but it adds historical context for receptor-level signaling work in adrenocortical tumor systems.³³⁰

PMID 25579646: A GLP OECD H295R steroidogenesis study of thermal-paper BPA alternatives found that BPF increased estradiol and BPS decreased free testosterone, whereas D-8 and Pergafast 201 showed no significant effects. This extends the note’s endocrine-toxicology discussion by highlighting that some BPA substitutes retain BPA-like steroidogenic activity in H295R.³³¹

PMID 2572076: This 1989 rat adrenal study reinforced earlier adrenocortical-carcinoma-based ANF signaling work by identifying a matching 180-kDa ANF receptor/membrane guanylate cyclase in adrenal tissue and showing PKC-dependent inhibitory phosphorylation of the enzyme. It mainly confirms and modestly refines the note’s historical natriuretic-peptide signaling context rather than altering interpretation of human ACC models.³³²

PMID 25723060: Cadmium chloride exposure in NCI-H295R reduced progesterone, testosterone, and 17β-estradiol output over 48 hours, while also causing dose-related cytotoxicity. The study mainly confirms H295R’s utility as an endocrine-disruption screening platform but also reinforces the need to interpret hormone changes alongside viability data.³³³

PMID 25765474: A 2015 H295R study of seafood-associated persistent organic pollutants found that several single compounds, especially PFOS, altered broad steroid-hormone profiles and related steroidogenic transcripts, while tested mixtures showed mostly additive effects. The work extends H295R profiling literature by combining multihormone and gene-expression readouts in a mixture-focused endocrine-screening design.³³⁴

PMID 26418325: In NCI-H295R cells, APA-associated ATP1A1 mutations increased aldosterone output and steroidogenic gene expression while depolarizing the membrane, but without a clear basal Ca2+ increase. The study adds nuance to adrenal ion-channel modeling by implicating disturbed pH homeostasis and incomplete cellular compensation alongside depolarization.³³⁵

PMID 26464060: This study showed that in H295R cells, thiacloprid and thiamethoxam induced aromatase activity together with promoter-specific CYP19 expression from PII and I.3, while similar induction was not seen in HUVEC cells. It therefore adds a cell-type- and promoter-specific nuance to H295R-based aromatase toxicology rather than changing the note’s overall framing.³³⁶

PMID 26484875: A 2015 ACC study suggested that sunitinib’s antiproliferative effects in adrenocortical models may be mediated at least partly through EGFR rather than VEGFR, and that direct EGFR inhibition was most active in high-EGFR settings such as SW-13 and one primary tumor culture. This extends targeted-therapy screening in ACC cell models toward biomarker-linked EGFR sensitivity and supports tumor profiling as a predictor of response.³³⁷

PMID 26608706: A 2016 H295R study used LC-MS/MS to profile a mesembrine-rich Sceletium extract and found reduced cortisol, aldosterone, androstenedione, and testosterone production under selected basal or stimulated conditions without overt short-term cytotoxicity. The work extends H295R screening beyond classic toxicants and targeted drugs to plant-derived compounds with pathway-specific steroidogenic effects, although it was not designed as an ACC therapeutic study.³³⁸

PMID 26645813: A 2016 letter reported that sirolimus plus mitotane produced additive growth inhibition in H295 and, more variably, SW-13 cells, extending prior mTOR-inhibitor findings from monotherapy to a mitotane-based combination setting. The paper emphasized the preliminary nature of the result and noted potential in vivo pharmacokinetic limitation from mitotane-induced CYP3A4 metabolism.³³⁹

PMID 27085065: A Chemosphere study combined H295R steroidogenesis exposure with yeast estrogen- and androgen-responsive bioluminescent reporter assays to detect indirect hormonal effects of atrazine. In that setup, atrazine-conditioned H295R media showed increased estrogenic and androgenic activity, highlighting a rapid functional screening approach beyond endpoint-specific hormone quantification.³⁴⁰

PMID 27139122: In H295R cells, PFOA and PFOS increased estradiol and lowered testosterone, with accompanying induction of CYP19 and 3β-HSD2 transcripts, extending the note’s endocrine-toxicology discussion to perfluoroalkyl acids. PFOS also increased CYP11B2, suggesting a possible aldosterone-related effect in addition to altered sex-steroid synthesis.³⁴¹

PMID 28271381: In H295R and SW-13, everolimus showed single-agent antiproliferative activity, but combinations with mitotane and/or pasireotide produced antagonistic effects in H295R and variable responses by model. Tissue analysis further showed heterogeneous mTOR-pathway and SSTR expression, with mTOR activation in only a subset of ACCs, arguing for caution in combination design and patient selection.³⁴²

PMID 28750898: An adjacent endocrine-toxicology study used H295R together with BeWo cells in a fetoplacental co-culture model, showing that neonicotinoids increased aromatase activity and estrone/estradiol but reduced estriol, with CYP3A7 induction in the H295R compartment.³⁴³

PMID 29035537: A cardiovascular medicinal-chemistry study used human adrenocortical carcinoma cells as an adrenal safety screen and reported that the CETP inhibitor TAP311 did not increase aldosterone secretion, unlike the off-target profile historically associated with torcetrapib. This is indirectly relevant to ACC but supports H295R use in off-target steroidogenesis testing during drug development.³⁴⁴

PMID 2904814: A renal glomerular membrane study used antibody to the 180-kDa ANP-sensitive guanylate cyclase previously purified from rat adrenocortical carcinoma and found immunologic and functional correspondence across tissues. It also showed PKC-dependent inhibition of ANP-stimulated guanylate cyclase activity, reinforcing the historical cyclic-GMP signaling framework discussed for adrenocortical tumor systems.³⁴⁵

PMID 29197012: A 2018 Methods in Molecular Biology article detailed the H295R-BeWo transwell co-culture as a fetoplacental steroidogenesis platform, emphasizing real-time cooperation in estrogen biosynthesis and practical assay features including hormone measurement, aromatase activity, proliferation monitoring, and transepithelial resistance. Its relevance to ACC is indirect, but it extends the note’s adjacent-model discussion by showing how H295R can be embedded in a polarized multicellular screening system.³⁴⁶

PMID 29524503: A developmental-toxicology study using NCI-H295A found that ethanol suppressed cortisol production while activating autophagy, and intervention experiments suggested autophagy partly compensates for steroidogenic impairment through an IGF1R/mTOR-linked context. This is indirectly relevant to ACC because it refines interpretation of H295-derived stress responses rather than informing tumor-directed therapy.³⁴⁷

PMID 29549738: A 2018 H295R endocrine-toxicology study found that triphenyltin and tributyltin produced a mixed steroidogenic pattern, with lower estradiol, cortisol, and aldosterone but higher testosterone, accompanied by reduced cAMP and adenylate cyclase activity and broad steroidogenic gene-expression changes. This extends the note’s cAMP-focused toxicology discussion by showing that disruption of the pathway can redistribute steroid flux rather than simply suppress all outputs.³⁴⁸

PMID 2992471: A 1985 biochemical study purified the α2-adrenergic receptor from rat adrenocortical carcinoma and identified a homogeneous approximately 64-kDa receptor species with expected α2-binding properties. It mainly confirms the note’s historical framing of rodent adrenocortical carcinoma as a source for early receptor-signaling biochemistry rather than modern human ACC modeling.³⁴⁹

PMID 30035358: In the murine Y1 adrenocortical tumor line, quantitative proteomics showed that FGF2 can trigger an antiproliferative state with delayed DNA replication and marked FosB/JunB induction through FGFR/Src signaling. The study is indirect for human ACC drug screening but adds mechanistic context for growth-factor-driven growth arrest in adrenocortical tumor models.³⁵⁰

PMID 30045567: A 2018 H295R proteomics study found that butyltin compounds, especially tributyltin, altered proteins involved in hormone homeostasis, lipid metabolism, energy production, and cell death. Bioinformatic analysis highlighted LXR/RXR and FXR/RXR pathway activation, extending H295R endocrine screening toward nuclear-receptor-linked metabolic mechanisms.³⁵¹

PMID 3007214: A 1986 rat adrenal study reported that atrial natriuretic factor rapidly increased cyclic GMP and corticosterone production in isolated fasciculata cells without a parallel rise in cyclic AMP, while also activating particulate guanylate cyclase. It also observed ANF-induced cyclic GMP elevation in rat adrenocortical carcinoma cells, adding functional support to the note’s historical natriuretic-peptide signaling context but remaining only indirectly relevant to modern human ACC models.³⁵²

PMID 3009985: Primary human adrenal-cell experiments showed stronger glucocorticoid stimulation by ACTH than by angiotensin II, while γ3-MSH preferentially enhanced aldosterone output and potentiated ACTH-induced aldosterone secretion. Although not an ACC study, it provides human adrenal context for interpreting steroidogenic signaling seen in H295-derived models.²⁸

PMID 30125658: In HAC15 cells, angiotensin 1-7 suppressed angiotensin II-stimulated aldosterone production through the MAS receptor and was associated with reduced JAK/STAT phosphorylation, adding a counter-regulatory layer to angiotensin II signaling in this ACC-derived model.³⁵³

PMID 31202858: A 2019 H295R study reported that angiotensin II promotes mitochondrial fusion through Mfn2 upregulation, with associated recruitment of PKCε/MEK/ERK and StAR to mitochondria and consequent support of aldosterone synthesis. This extends the note’s steroidogenesis section by linking adrenal signaling to mitochondrial dynamics and protein compartmentalization rather than to kinase cascades alone.³⁵⁴

PMID 31476908: In patients with aldosterone-producing adenoma, circulating AT1-receptor autoantibodies were detectable with commercial assays and did not normalize one month after adrenalectomy. Purified patient IgG modestly increased CYP11B2 expression and aldosterone secretion in HAC15 cells, supporting weak, context-dependent agonist activity in a human adrenocortical carcinoma model rather than a clear ACC-specific mechanism.³⁵⁵

PMID 31536780: In the H295R-BeWo fetoplacental co-culture, estragole and trans-anethole increased several steroid hormones and altered steroidogenic-gene expression without overt short-term cytotoxicity. The study further suggested compartment-specific signaling, with promoter-specific CYP19 regulation linked to PKA activity in H295R and PKC activity in BeWo, reinforcing the model’s usefulness for adjacent multicellular steroidogenesis screening rather than ACC-specific tumor questions.³⁵⁶

PMID 31884045: A H295R UHPLC-MS/MS profiling study found that several anabolic androgenic steroids, but not tested nonsteroidal SARMs, altered adrenal steroidogenesis in patterns consistent with indirect CYP17A1- or CYP21A2-linked interference and possible mineralocorticoid excess. This extends the note’s drug-screening discussion by showing that ACC-derived models can identify adrenal safety liabilities of pharmacologic agents as well as candidate antitumor compounds.³⁵⁷

PMID 32573024: An NMR-metabolomics study in H295R found stereoselective metabolic effects of four cypermethrin isomers, with (1R,3R,αS)-cypermethrin producing the strongest shifts in extracellular metabolites and pathway signatures. This extends the note’s endocrine-screening coverage by adding untargeted metabolomic profiling as a complementary H295R readout rather than a direct ACC-model advance.³⁵⁸

PMID 33677314: This article extends the note’s pyrethroid section by showing that cypermethrin stereoisomers produce distinct receptor-level and H295R steroidogenic-gene effects rather than a single class-wide pattern. In H295R, all stereoisomers suppressed 3β-HSD transcripts, while α- and β-cypermethrin additionally induced CYP19, CYP11B2, STAR, and 17β-HSD, supporting stereoisomer-specific endocrine disruption in an ACC-derived screening model.³⁵⁹

PMID 35031428: A 2022 study combined MALDI imaging of aldosterone-producing adenoma tissue with H295R experiments and found adrenal accumulation of amlodipine together with findings consistent with reduced HSD3B-linked steroidogenesis. Its relevance to ACC is indirect, but it extends H295R-based calcium-channel-blocker work toward a tissue-validated translational context in human adrenal disease.³⁶⁰

PMID 5489017: A 1970 rat study of two oestrone-induced transplantable adrenocortical carcinoma lines found no consistent target-organ-like retention of injected tritiated oestradiol; differences between tumor lines were interpreted as reflecting hormonal milieu more than specific adrenal estrogen retention. This is indirect historical context rather than evidence about modern human ACC cell-line behavior.³⁶¹

PMID 6371013: A 1984 biochemical study purified a novel cytoplasmic autophosphorylating protein kinase from rat adrenocortical carcinoma 494 that appeared independent of cAMP, cGMP, calcium, and calmodulin, and could phosphorylate a membrane-bound ribosomal protein in vitro. Its relevance to ACC is mainly historical and mechanistic, illustrating early use of adrenal tumor models to study noncanonical signaling and possible translational control rather than modern drug screening.³⁶²

PMID 6865417: An older rat adrenocortical carcinoma study showed efficient conversion of radiolabeled 25-hydroxycholesterol to pregnenolone in tumor cells and adrenal mitochondrial preparations, supporting the idea that some hydroxysterols can bypass transport-limited steps in steroidogenesis.³⁶³

PMID 7623790: A 1995 comparative study further supported the historical alpha2-adrenergic receptor literature in rat adrenocortical carcinoma by molecularly characterizing the rat cA2-47 receptor, showing similarity to the rat RG20 alpha2 subtype and detecting transcript in rat adrenal and adrenocortical carcinoma. It is mainly relevant as historical receptor-biochemistry context and as a reminder of species-specific differences from the human receptor.³⁶⁴

PMID 8425475: In mouse Y1 adrenocortical carcinoma cells, cAMP increased P450scc-system proteins and pregnenolone production, whereas PKC-pathway activation reduced selected side-chain-cleavage components without stimulating steroidogenesis. This extends older Y1 literature by linking adrenocortical tumor-cell steroid output to coordinated regulation of mitochondrial cholesterol side-chain cleavage proteins.³⁶⁵

PMID 8533298: A 1995 veterinary study showed that BASP partially suppressed basal and ACTH-stimulated cortisol production in primary canine adrenocortical carcinoma cells while increasing cAMP, suggesting inhibition distal to canonical ACTH/cAMP signaling. Its relevance to ACC is indirect and comparative, but it adds historical context for steroidogenesis-directed pharmacologic probing in carcinoma-derived adrenal cells.³⁶⁶

PMID 8923003: A 1996 molecular study found that NCI-H295 adrenocortical carcinoma cells initiate tenascin-X transcription from alternative upstream promoters rather than the principal promoter used in fetal adrenal and muscle, with altered splicing and prominent nuclear retention of transcripts. This is indirectly relevant to ACC modeling because it illustrates endogenous promoter-selection and RNA-processing differences between H295 cells and normal adrenal tissue.³⁶⁷

PMID 9731205: A 1998 study in ovarian carcinoma cells found that overexpression of the PKA regulatory subunit RIα increased cisplatin sensitivity and partly reversed resistance, while linking these results to earlier Y1 adrenocortical carcinoma mutant data suggesting RI-subunit involvement in responses to DNA-damaging drugs. For ACC models, the relevance is indirect but historically notable as a possible PKA-related chemotherapy-resistance mechanism beyond standard catalytic signaling.³⁶⁸

PMID 16828825: This H295R study developed a targeted assay for CYP17 catalytic activity and found that several hydroxylated or methoxylated PBDE metabolites inhibited pregnenolone-to-DHEA conversion, whereas most parent brominated flame retardants were inactive or only weakly inhibitory. It extends the note’s endocrine-toxicology coverage from aromatase-focused effects to possible disruption of adrenal androgen synthesis upstream at CYP17, with cautious interpretation because some stronger effects coincided with reduced viability.³⁶⁹

PMID 22382638: In H295R cells, native, oxidized, and glycoxidized HDL increased aldosterone release, especially after angiotensin II sensitization, with evidence for scavenger-receptor upregulation and ERK/PKC/JAK2 pathway involvement. The study is indirectly relevant to ACC because it informs steroidogenic signaling biology in a standard ACC-derived model rather than tumor behavior itself.³⁷⁰

PMID 11675267: An environmental toxicology study used H295R cells to show that atrazine, simazine, propazine, and selected metabolites increased aromatase activity and CYP19 mRNA, supporting H295R as a responsive steroidogenesis assay. The findings are relevant to ACC mainly as evidence of H295R’s endocrine signaling utility rather than as a therapeutic study.³⁷¹

PMID 15361251: In H295R cells, CCN3/NOV was detected in cytoplasmic, membrane-associated, and extracellular-matrix-associated compartments, with evidence that secreted and cell-associated forms differ conformationally. The study is only indirectly informative for ACC, but it adds support for using H295R to examine matrix-linked signaling biology beyond steroidogenesis.³⁷²

PMID 19372190: A comparative study in H295R and primary bovine glomerulosa cells found that phospholipase D activation during aldosterone-related signaling depends on calcium influx through stimulus- and model-specific pathways. It extends the note’s endocrine-signaling section by adding nuance on why H295R can model adrenal mechanisms without fully mirroring primary adrenal physiology.³⁷³

PMID 20123619: A 2010 study developed a computational model of steroidogenesis in H295R cells using multi-steroid time-course measurements and metyrapone perturbation data. It adds a quantitative modeling dimension to the note’s discussion of H295R as an endocrine toxicology platform, with relevance to ACC that is primarily indirect.³²

PMID 23178798: A HAC15-based mechanistic study found that phospholipase D contributes to angiotensin II-induced PKD activation and aldosterone production, extending the note’s steroidogenesis section with a more specific downstream signaling link. It also highlighted that HAC15 may show sustained AngII-stimulated PLD activity unlike earlier H295R reports, underscoring meaningful variation within H295-derived models.³⁴

PMID 25170332: A 2014 toxicology study used H295R as part of a multi-assay platform for environmental exposures, finding reactive oxygen species generation from multiwalled carbon nanotubes without clear cytotoxicity or endocrine disruption, and attenuation of triclocarban effects in mixture conditions. This supports the note’s framing of H295R as valuable for endocrine and toxicologic mechanism work, with only indirect relevance to ACC therapeutics.³⁷⁴

PMID 25776071: Using H295R together with human adrenal zonation data, this study identified DACH1 as a zona glomerulosa-selective regulator that suppresses aldosterone secretion and engages TGF-β and Wnt signaling. It adds a transcriptional-regulatory nuance to the note’s discussion of H295R as a model of adrenal endocrine biology, with only indirect relevance to ACC drug screening.³⁷⁵

PMID 27222295: In HAC15 cells, VLDL stimulated aldosterone production and CYP11B2 through PLC/IP3/PKC signaling, with evidence that PKC lies upstream of ERK activation. The study adds a metabolic-lipoprotein input to the aldosterone-signaling network modeled in H295-derived systems, mainly informing adrenal physiology rather than direct ACC drug selection.³⁷⁶

PMID 28962244: A toxicology study of conazole fungicides in Leydig and androgen-reporter systems cited prior H295R work showing reduced testosterone secretion and altered steroidogenic flux after exposure to several conazoles. For this note, it mainly reinforces H295R’s established role in endocrine toxicology and steroidogenesis-perturbation research, with only indirect relevance to ACC therapy modeling.³⁷⁷

PMID 29109191: A Hypertension study used HAC15 cells to show that CALN1, an endoplasmic-reticulum calcium-binding protein highlighted in aldosterone-producing adenoma, increases ER calcium storage and supports angiotensin II- or KCNJ5-driven aldosterone synthesis. For this note, the main value is mechanistic: it extends the calcium-signaling framework in HAC15 as an adrenal steroidogenesis model, with only indirect relevance to ACC drug selection.³⁵

PMID 29151792: Using the OECD H295R steroidogenesis assay, fluoxetine increased estradiol secretion at low submicromolar concentrations without clear changes in testosterone or CYP19A1 mRNA, supporting use of H295R as a mechanistic endocrine toxicology platform. Its ACC relevance is therefore mainly indirect rather than therapeutic.³⁷⁸

PMID 29403275: A nanomedicine study used SW-13 cells and xenografts to test VEGF-targeted albumin/graphene-oxide paclitaxel nanoparticles with near-infrared photothermal triggering. Its ACC relevance is mainly methodological, illustrating how ACC-associated models can be used to evaluate targeted drug-delivery platforms rather than tumor-intrinsic dependencies.³⁷⁹

PMID 29959979: A 2018 study in HAC15 cells found that cholinergic agonists induce heterogeneous calcium oscillations and modest aldosterone secretion mainly through M3 muscarinic receptors, adding a cholinergic layer to adrenal signaling in this ACC-derived model. The article is more informative for steroidogenic mechanism than for ACC therapy selection.³⁶

PMID 30279954: A 2018 News commentary highlighted repurposing-based screening in ACC and discussed the reported synergy of flavopiridol plus carfilzomib in relation to recurrent G1/S-checkpoint alterations. It also stressed that ACC heterogeneity limits broad therapeutic generalization from existing cell models and supports biomarker-guided interpretation of targeted combinations.³⁸⁰

PMID 31031706: A 2019 study linked clinical soy-isoflavone exposure data with H295R experiments, showing reduced DHEA output consistent with inhibition of CYP17A1 17,20-lyase activity. Its main relevance here is as an example of H295R being used to model selective adrenal steroidogenesis perturbation by non-oncology exposures rather than ACC-specific therapy.³⁸¹

PMID 31065237: A comparative in vitro study of sodium meta-arsenite included NCI-H295R as a non-prostate cancer control and found decreased H295R proliferation with increasing exposure, without the hormetic low-dose stimulation seen in prostate cells. For this note, the ACC relevance is indirect and mainly highlights cell-type-specific interpretation of proliferation assays.³⁸²

PMID 31865789: In aldosterone-producing adenoma, CLGN was strongly upregulated and associated with aldosterone production; in HAC15, CLGN overexpression increased aldosterone output without raising CYP11B2 mRNA, suggesting a translational or protein-processing mechanism. For this note, the ACC relevance is indirect and mainly concerns refinement of HAC15 as a model of ER-linked steroidogenic regulation.³⁸³

PMID 31945643: A breast-cancer-focused medicinal-chemistry study included H295R and found submicromolar cytotoxicity for a Ru(II) cyclopentadienyl complex, with evidence suggesting the effect was not primarily due to aromatase inhibition. For ACC, this is indirect but relevant as an example of exploratory metallodrug activity in H295R rather than a validated ACC-specific target or treatment strategy.³⁸⁴

PMID 32332902: A natural-products study used H295R to test crude Nidularium procerum leaf extracts and reported MTT-based antitumoral activity, alongside phytochemical, antioxidant, and immunomodulatory characterization. For ACC, the relevance is indirect and mainly methodological, illustrating H295R as a platform for exploratory screening of complex botanical mixtures rather than validating a specific therapeutic vulnerability.³⁸⁵

PMID 34287026: A 2021 Environ Health Perspectives analysis used high-throughput H295R steroidogenesis data to identify hundreds of chemicals that increased estradiol and/or progesterone synthesis. For this note, it mainly confirms H295R’s established use as a scalable endocrine toxicology and hormone-perturbation platform with only indirect relevance to ACC treatment modeling.³⁸⁶

PMID 34335472: Using H295R and rat adrenal experiments, this study found that atrazine pretreatment enhanced angiotensin II-stimulated aldosterone output, supporting H295R as a sensitive model for stimulus-dependent endocrine perturbation by environmental chemicals rather than a direct ACC therapeutic model.³⁸⁷

PMID 34681640: In HAC15 cells engineered with the APA-associated ATP1A1 L104R mutation, investigators observed increased proliferation, calcium signaling, and Src activation, with low-dose ouabain further enhancing growth-related signaling. For this note, the relevance to ACC is indirect and mainly methodological, showing that HAC15 can capture growth as well as aldosterone-related consequences of adrenal ion-transport mutations.³⁸⁸

PMID 36450809: Using previously generated high-throughput H295R steroidogenesis data, this study developed chemotype and QSAR models to predict chemicals that increase estradiol or progesterone synthesis. For this note, it mainly confirms H295R’s established use as a human adrenal endocrine-toxicology platform rather than a direct ACC drug-selection model.³⁸⁹

PMID 37298327: In HAC15 cells, PFOA and PFOS increased CYP11B2 expression and aldosterone secretion and potentiated angiotensin II responses, with evidence implicating cellular and mitochondrial ROS. The study mainly extends the note’s endocrine-disruption framing for HAC15 and is indirectly relevant to ACC as adrenal signaling methodology rather than as a therapeutic model finding.³⁹⁰

PMID 37759554: Published erratum to a prior comparative ACC cell-model steroidogenic-signaling study corrected SF-1 regulation in NCI-H295R after forskolin stimulation from down- to up-regulation, with the authors stating that overall scientific conclusions were unaffected. The correction mainly reinforces cautious interpretation of lineage-specific transcriptional responses rather than changing the note’s broader framing.³⁹¹

PMID 40576990: A 2025 Environ Sci Technol study used high-throughput H295R data and enzyme-specific datasets to build machine-learning and transformer models that predict general steroidogenesis disruption and likely steroidogenic enzyme targets, with prospective validation reported for a small test set. For this note, the relevance to ACC is indirect and mainly methodological, reinforcing H295R’s role as a computationally tractable adrenal assay platform rather than a direct therapeutic model.³³

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acc_cell_lines_and_drug_screening_models

ACC Cell Lines and Drug-Screening Models

Model landscape and biologic context

Major experimental phenotypes

Steroidogenesis and adrenal signaling

Proliferation, invasion, and stress phenotypes

Drug screening and therapeutic hypothesis generation

Resistance and methodological pitfalls

Emerging platforms and role in ACC research

Included Articles

References

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Table of Contents

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Quartz 4

Explorer

acc_cell_lines_and_drug_screening_models

ACC Cell Lines and Drug-Screening Models

Model landscape and biologic context

Major experimental phenotypes

Steroidogenesis and adrenal signaling

Proliferation, invasion, and stress phenotypes

Drug screening and therapeutic hypothesis generation

Resistance and methodological pitfalls

Emerging platforms and role in ACC research

Included Articles

References

Footnotes

Graph View

Table of Contents

Backlinks