{"gene":"ATOH8","run_date":"2026-06-09T22:02:44","timeline":{"discoveries":[{"year":2013,"finding":"ATOH8 activates HAMP (hepcidin) transcription by directly binding E-box regions within the HAMP promoter (shown by ChIP assay), and also indirectly through BMP signaling by increasing phosphorylated SMAD1/5/8 levels; mutation of E-box or SMAD response elements in the HAMP promoter significantly reduced ATOH8-mediated activation.","method":"Chromatin immunoprecipitation (ChIP), luciferase reporter assay, site-directed mutagenesis of promoter elements, western blot for pSMAD1/5/8","journal":"British journal of haematology","confidence":"High","confidence_rationale":"Tier 1 / Moderate — multiple orthogonal methods (ChIP, reporter mutagenesis, western blot) in a single study establishing direct binding and transcriptional activation","pmids":["24236640"],"is_preprint":false},{"year":2013,"finding":"ATOH8 lacks a canonical transactivation domain and possesses intrinsic repressor activity dependent on a conserved Proline-rich domain. ATOH8 binds the ubiquitous E protein E47 and inhibits E47/E47 and Neurogenin3/E47 dimer transcriptional activities, thereby blocking induction of a subset of proendocrine gene targets.","method":"Reporter assays, domain deletion/mutagenesis, co-immunoprecipitation, global gene expression profiling in pancreatic mPAC cells","journal":"Biochimica et biophysica acta","confidence":"High","confidence_rationale":"Tier 1 / Moderate — domain mutagenesis identifying repressor domain plus Co-IP of E47 binding and functional reporter assays, multiple orthogonal methods in one study","pmids":["23938248"],"is_preprint":false},{"year":2019,"finding":"ATOH8 is a direct transcriptional target of the BMP-SMAD1/5 axis in endothelial cells; ATOH8 induction by BMP is independent of Notch signaling. ATOH8 protein interacts with HIF-2α and decreases its abundance, leading to reduced transcription of HIF-2α target genes under hypoxia. Atoh8-deficient mice develop a pulmonary arterial hypertension-like phenotype (increased pulmonary arterial pressure, right ventricular hypertrophy).","method":"Co-immunoprecipitation (ATOH8–HIF-2α interaction), reporter assays, genetic knockout mice, in vivo hemodynamic measurements, zebrafish studies","journal":"Science signaling","confidence":"High","confidence_rationale":"Tier 2 / Moderate — reciprocal Co-IP plus in vivo knockout phenotyping and multiple signaling pathway analyses across two organisms","pmids":["31719172"],"is_preprint":false},{"year":2020,"finding":"BMP-SMAD1 signaling directly upregulates Atoh8 in osteoblasts. Atoh8 forms a protein complex with Runx2 to inhibit Runx2 transcriptional activity, thereby reducing the Rankl/Opg expression ratio in osteoblasts and suppressing osteoclastogenesis. Atoh8-null marrow stroma cells were more potent than wild-type cells in inducing osteoclastogenesis.","method":"Co-immunoprecipitation (Atoh8–Runx2 complex), gene expression analysis, Atoh8 global knockout mice, marrow stromal cell osteoclastogenesis assays, Runx2 knockdown epistasis","journal":"Bone research","confidence":"High","confidence_rationale":"Tier 2 / Moderate — Co-IP of Atoh8-Runx2 complex plus in vivo knockout and epistasis by Runx2 knockdown rescue of Rankl/Opg ratio","pmids":["32923015"],"is_preprint":false},{"year":2023,"finding":"ATOH8 binds SMAD3 (but not SMAD2 or SMAD4) to form a transcriptional repressive complex that directly represses cell cycle-promoting genes, causing oncogene-induced senescence in lung epithelial cells downstream of TGF-β1/SMAD3 activation. Depleting Atoh8 accelerates oncogenic Ras-driven lung tumorigenesis in vivo, and lung cancers driven by mutant Ras plus Atoh8 loss are sensitive to a specific SMAD3 inhibitor.","method":"Co-immunoprecipitation (ATOH8–SMAD3), ChIP-seq/reporter assays for target gene repression, Atoh8 knockout mice with oncogenic Ras, SMAD3 inhibitor treatment","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 2 / Moderate — reciprocal Co-IP plus in vivo genetic epistasis (Atoh8 loss + Ras) and pharmacological validation, multiple orthogonal methods","pmids":["36626550"],"is_preprint":false},{"year":2014,"finding":"ATOH8 (Hath6) acts as a shear-stress-responsive transcription factor in endothelial cells. Overexpression of Hath6 (mimicking shear stress) increases endothelial differentiation markers (CD45−CD31+KDR+ population, tubular structure formation) and endothelial gene expression. The eNOS gene is a direct transcriptional target of Hath6, demonstrated by reporter assay; inhibition of eNOS diminishes hESC-to-endothelial cell differentiation.","method":"Gain- and loss-of-function in hESC-EC induction system, luciferase reporter assay for eNOS promoter, western blot, in situ hybridization in zebrafish and mouse embryos","journal":"Journal of cell science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reporter assay establishing direct eNOS targeting plus functional rescue, but single lab","pmids":["24463812"],"is_preprint":false},{"year":2015,"finding":"ATOH8 represses transcription of stem-cell-associated genes OCT4, NANOG, and CD133 in hepatocellular carcinoma cells, as demonstrated by mobility shift and luciferase reporter assays. Transgenic ATOH8 expression reduces CD133+ cell populations, tumor formation, and invasion, while ATOH8 knockdown causes CD133-negative cells to acquire stem-cell properties.","method":"Electrophoretic mobility shift assay (EMSA), luciferase reporter assay, lentiviral overexpression and siRNA knockdown, xenograft tumor assays, flow cytometry","journal":"Gastroenterology","confidence":"High","confidence_rationale":"Tier 2 / Strong — EMSA and reporter assays for direct DNA binding plus replicated in multiple HCC cell lines and in vivo xenograft models","pmids":["26099525"],"is_preprint":false},{"year":2020,"finding":"In response to laminar shear stress, VEGF is released by circulating colorectal cancer cells, activating a VEGFR2/AKT signaling axis that upregulates ATOH8 expression. ATOH8 then transcriptionally activates HK2, promoting glycolysis and intravascular survival of tumor cells.","method":"Western blotting, quantitative PCR, immunofluorescence, glycolysis assay, anoikis assay, cyclic laminar shear stress system, pathway inhibitor experiments","journal":"Journal of experimental & clinical cancer research : CR","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple functional assays establishing pathway axis (VEGFR2/AKT→ATOH8→HK2), single lab","pmids":["32000836"],"is_preprint":false},{"year":2019,"finding":"EZH2 represses ATOH8 expression in HCC cells via H3K27 trimethylation and DNA methylation of the ATOH8 promoter, as demonstrated by chromatin immunoprecipitation and bisulfite genomic sequencing. This mechanism operates downstream of the Lnc-PDZD7/miR-101/EZH2 axis.","method":"Chromatin immunoprecipitation (ChIP), bisulfite genomic sequencing, dual-luciferase reporter assay, western blot","journal":"Journal of experimental & clinical cancer research : CR","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP and bisulfite sequencing establishing epigenetic repression mechanism, single lab with two orthogonal methods","pmids":["30786928"],"is_preprint":false},{"year":2021,"finding":"LncRNA CIR binds EZH2 (shown by RNA immunoprecipitation and biotin pull-down) and recruits it to the ATOH8 promoter, resulting in EZH2-mediated H3K27me3 and methylation-based repression of ATOH8 in mesenchymal stem cells. Loss of lncRNA CIR or overexpression of ATOH8 promotes chondrogenic differentiation; inhibition of ATOH8 reverses effects of lncRNA CIR knockdown.","method":"RNA immunoprecipitation, biotin pull-down, ChIP, western blot, qRT-PCR, gain/loss-of-function in hUC-MSCs","journal":"Molecular medicine (Cambridge, Mass.)","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — RNA-IP and biotin pulldown of lncRNA-EZH2 interaction and ChIP of H3K27me3 at ATOH8 promoter, epistasis by ATOH8 rescue, single lab","pmids":["33546582"],"is_preprint":false},{"year":2016,"finding":"EBV-encoded LMP1 inhibits ATOH8 expression in nasopharyngeal carcinoma cells by epigenetically reducing activating H3K4me3 and increasing repressive H3K27me3 occupancy on the ATOH8 promoter, as shown by ChIP assay. ATOH8 restoration reverses the LMP1-induced malignant phenotype.","method":"ChIP assay for H3K4me3 and H3K27me3, gain/loss-of-function assays, western blot, real-time PCR","journal":"Oncotarget","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP for two histone marks at ATOH8 promoter plus functional rescue, single lab","pmids":["27049918"],"is_preprint":false},{"year":2021,"finding":"A novel isoform, ATOH8-V1, directly binds the RhoC promoter and transcriptionally activates RhoC expression, thereby enhancing metastasis of breast cancer cells.","method":"ChIP assay, luciferase reporter assay, overexpression and silencing of ATOH8-V1, metastasis assays","journal":"Journal of molecular cell biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP and reporter assay establishing direct promoter binding and transcriptional activation of RhoC, single lab","pmids":["33049034"],"is_preprint":false},{"year":2019,"finding":"Atoh8 regulates chondrocyte proliferation and hypertrophic differentiation in endochondral bones. Atoh8 deletion (chondrocyte-specific and germline) leads to reduced zones of proliferating and hypertrophic chondrocytes and shorter bones. Atoh8 acts on the onset of hypertrophy upstream of Ihh (likely modulating Ihh expression), while regulating chondrocyte proliferation in parallel or downstream of Ihh signaling (demonstrated by Purmorphamine activation of Ihh pathway).","method":"Conditional and germline Atoh8 knockout mice (Col2a1-Cre; Prx1-Cre), histological analysis, Purmorphamine (Ihh agonist) epistasis experiment, molecular marker analysis","journal":"PloS one","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic epistasis via pharmacological Ihh activation in Atoh8 knockout background, in vivo conditional KO, single lab","pmids":["31449527"],"is_preprint":false},{"year":2022,"finding":"Atoh8 restrains cellular plasticity (reprogramming and oncogenic transformation) independently of cellular identity by binding a specific enhancer network, as part of a c-Myc/Atoh8/Sfrp1 regulatory axis identified by multiomics characterization at single-cell resolution.","method":"Single-cell multiomics (scRNA-seq, epigenomics), chromatin binding analysis of enhancer networks, genetic perturbation during reprogramming and transformation","journal":"Nature cell biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiomics with enhancer binding characterization, single study with multiple orthogonal approaches","pmids":["36075976"],"is_preprint":false},{"year":2025,"finding":"ATOH8 suppresses SCD (stearoyl-CoA desaturase) transcription, sensitizing tumor cells to ferroptosis. TCF3 acts as a co-factor with ATOH8, forming a TCF3-ATOH8 transcriptional repressive complex at the SCD locus. EZH2 epigenetically suppresses ATOH8 expression via DNA methylation of the ATOH8 promoter and H3K27me3 elevation.","method":"Overexpression/deletion of ATOH8 in tumor cells, reporter assays for SCD transcription, co-immunoprecipitation of TCF3-ATOH8 complex, ChIP for EZH2/H3K27me3 at ATOH8 promoter, ferroptosis sensitivity assays in vitro and in vivo","journal":"Cell death and differentiation","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP of TCF3-ATOH8 complex plus ChIP and functional reporter assays, multiple orthogonal methods in one study, single lab","pmids":["40133667"],"is_preprint":false},{"year":2025,"finding":"PPP3CB (calcineurin) physically interacts with ATOH8 (shown by co-immunoprecipitation confirmed by mass spectrometry) and promotes ATOH8 nuclear translocation in pancreatic cancer cells. Nuclear ATOH8 binds the Sp1 promoter (shown by ChIP-seq and luciferase assay) and transcriptionally inhibits Sp1, suppressing pancreatic cancer metastasis.","method":"Liquid chromatography-tandem mass spectrometry, co-immunoprecipitation, ChIP-seq, luciferase reporter assay, immunofluorescence/confocal microscopy for nuclear translocation, xenograft mouse models","journal":"Life sciences","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP validated by MS, ChIP-seq confirming Sp1 promoter binding, nuclear localization by imaging, single lab","pmids":["40222712"],"is_preprint":false},{"year":2024,"finding":"FXR1 (RNA-binding protein) binds the 3'UTR of ATOH8 mRNA and promotes its degradation, negatively regulating ATOH8 at the post-transcriptional level in esophageal cancer cells.","method":"Direct 3'UTR interaction assay, mRNA stability assay, FXR1 knockdown/overexpression experiments, in vitro and in vivo functional assays","journal":"Biology direct","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct 3'UTR binding shown with functional mRNA stability outcomes, single lab","pmids":["39511680"],"is_preprint":false},{"year":2025,"finding":"WTAP methyltransferase promotes m6A modification of Atoh8 mRNA, reducing its stability and expression in mesangial cells. Reduced Atoh8 promotes mesangial cell proliferation and fibrosis in diabetic nephropathy; overexpression of Atoh8 restrained these processes.","method":"MeRIP-Seq combined with RNA-Seq, WTAP knockdown, Atoh8 overexpression in mouse mesangial cells, db/db mouse model","journal":"Cell biochemistry and biophysics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — MeRIP-Seq identifying m6A on Atoh8 mRNA plus functional validation, single lab","pmids":["40399698"],"is_preprint":false},{"year":2025,"finding":"Loss of ATOH8 in podocytes activates TGF-β signaling: ATOH8-knockdown podocytes show SMAD2/3 nuclear translocation, increased SMAD transcriptional activity (luciferase assay), upregulated TGFB1 mRNA, and increased extracellular matrix gene expression even without exogenous TGF-β. In vivo, Atoh8-deficient mice develop more severe glomerulosclerosis in an adriamycin-induced FSGS model.","method":"shRNA knockdown, RNA sequencing, SMAD2/3 localization imaging, SMAD luciferase reporter assay, Atoh8 knockout mouse + adriamycin nephropathy model","journal":"American journal of physiology. Renal physiology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple in vitro methods (RNAseq, reporter, imaging) plus in vivo epistasis, single lab","pmids":["41545031"],"is_preprint":false},{"year":2023,"finding":"BMP2 (via ALK2/3 receptor) and cAMP signaling upregulate ATOH8 expression during human endometrial stromal fibroblast (ESF) decidualization. ATOH8 protein localizes predominantly to the nucleus in decidualizing cells. ATOH8 silencing reduces FZD4 and FOXO1 expression and downstream FOXO1 targets, placing ATOH8 as a major upstream regulator of the WNT/FZD-FOXO1 pathway in decidualization.","method":"siRNA knockdown and overexpression of ATOH8, BMP2/ALK2/3 inhibitor treatment, cAMP analogue treatment, immunofluorescence for nuclear localization, qRT-PCR and western blot","journal":"Endocrinology","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — nuclear localization confirmed by immunofluorescence, pathway placement by knockdown with marker readouts, single lab","pmids":["38060684"],"is_preprint":false},{"year":2021,"finding":"PRC2-regulated Atoh8 restrains intestinal M cell differentiation: Atoh8 null mice showed a significant increase in mature M cells (Gp2+), M cell-associated markers (Spi-B, Sox8), and increased transcytosis of luminal antigens in Peyer's patches.","method":"Atoh8 knockout mice, RankL-treated intestinal organoids, immunofluorescence, in vitro organoid analysis","journal":"International journal of molecular sciences","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo knockout plus organoid analysis, single lab","pmids":["34502262"],"is_preprint":false},{"year":2025,"finding":"Loss of Atoh8 impairs macroautophagy: Atoh8-null primary myoblasts and mouse embryonic stem cells show differential LC3B-II expression, TFEB levels, and accumulation of p62 (autophagy cargo receptor). Cut&Tag sequencing in Atoh8-overexpressing C2C12 cells revealed Atoh8 binding to multiple genes involved in autophagosome assembly. Atoh8 overexpression increases autophagic flux while its loss disrupts it.","method":"Western blot for autophagy markers (LC3B-II, p62, TFEB), mass spectrometry proteomics, Cut&Tag sequencing for chromatin binding in Atoh8-overexpressing cells, Atoh8 knockout myoblasts and ESCs","journal":"Cells","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple orthogonal methods (western blot for autophagy markers, MS proteomics, Cut&Tag for direct binding), single lab","pmids":["41440013"],"is_preprint":false},{"year":2010,"finding":"Atoh8 is required for retinal lamination and skeletal muscle fiber differentiation in zebrafish. Morpholino-mediated knockdown results in reduced eye size with disorganization of retinal lamination and disrupted arrangement of paraxial cells and differentiated muscle fibers during somite morphogenesis.","method":"Morpholino knockdown in zebrafish, whole-mount in situ hybridization, histological analysis of retina and somites","journal":"PloS one","confidence":"Low","confidence_rationale":"Tier 3 / Weak — morpholino knockdown in zebrafish (morpholino phenotypes later disputed by PMID 28182631 genetic mutant study); single lab, no rescue","pmids":["20532172"],"is_preprint":false},{"year":2025,"finding":"ATOH8 is required for extravillous trophoblast (EVT) differentiation from human trophoblast stem cells. ATOH8 knockdown during EVT differentiation causes morphological abnormalities, impaired EVT marker expression, sustained TSC marker expression, and abolished invasive capacity, while disrupting extracellular matrix organization and PI3K-AKT signaling pathways. ATOH8 functions within a cooperative transcriptional network of EVT regulators, reciprocally regulating their expression.","method":"ATOH8 siRNA knockdown and overexpression in human TSCs, transcriptomic profiling (RNA-seq), invasion assays, marker expression analysis","journal":"Scientific reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — transcriptome-wide profiling plus functional invasion assays and reciprocal regulation analysis, single lab","pmids":["41188410"],"is_preprint":false},{"year":2019,"finding":"GDF5 promotes neuronal differentiation of retinal stem cells through activation of Smad signaling, and this effect is mediated by Atoh8; Atoh8 modulates the GDF5-induced neurogenesis and neurite outgrowth.","method":"Retinal stem cell differentiation assay, Atoh8 gain/loss-of-function, Smad signaling pathway analysis","journal":"Journal of cellular physiology","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single lab, limited mechanistic detail in abstract, pathway placement by single assay","pmids":["31066042"],"is_preprint":false},{"year":2020,"finding":"CYP3A5 interacts with ATOH8 by co-immunoprecipitation in lung adenocarcinoma cells, and this interaction mediates inactivation of the Smad1 phosphorylation pathway, suppressing metastasis.","method":"Co-immunoprecipitation, high-throughput phosphorylation chip, western blot, in vitro migration/invasion assays, in vivo metastasis model","journal":"American journal of cancer research","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single Co-IP identifying interaction plus phospho-chip data, single lab, limited mechanistic detail","pmids":["33163265"],"is_preprint":false}],"current_model":"ATOH8 is a bHLH transcription factor that can act as both a transcriptional activator and repressor: it directly binds E-box elements in target gene promoters (e.g., HAMP, SCD, Sp1, RhoC, eNOS) and interacts with multiple protein partners (E47, SMAD3, SMAD1/5, HIF-2α, Runx2, TCF3, PPP3CB, CYP3A5) to regulate iron homeostasis, cellular senescence, ferroptosis sensitivity, osteoclastogenesis, pulmonary arterial hypertension, endothelial differentiation, and cancer stem cell properties; its expression is itself regulated by BMP-SMAD signaling, EZH2-mediated H3K27me3 and DNA methylation, m6A modification via WTAP, and post-transcriptional degradation by FXR1."},"narrative":{"mechanistic_narrative":"ATOH8 is a basic helix-loop-helix transcription factor that operates downstream of BMP-SMAD and TGF-β signaling to constrain cellular plasticity, differentiation, and metabolic programs across multiple tissues [PMID:31719172, PMID:36626550, PMID:36075976]. It lacks a canonical transactivation domain and carries intrinsic repressor activity dependent on a conserved proline-rich domain; it binds the ubiquitous E protein E47 and quenches E47- and Neurogenin3-driven transcription [PMID:23938248]. ATOH8 acts directly on chromatin through E-box recognition—activating HAMP (hepcidin) and the eNOS promoter [PMID:24236640, PMID:24463812] and an ATOH8-V1 isoform activating RhoC [PMID:33049034]—while functioning as a repressor at cell-cycle, stemness, and metabolic loci by partnering with sequence- and signal-specific cofactors: SMAD3 to drive oncogene-induced senescence and restrain Ras-driven lung tumorigenesis [PMID:36626550], Runx2 to lower the Rankl/Opg ratio and suppress osteoclastogenesis [PMID:32923015], and TCF3 to repress SCD and sensitize tumor cells to ferroptosis [PMID:40133667]. It also binds and destabilizes HIF-2α, and Atoh8-deficient mice develop a pulmonary arterial hypertension-like phenotype [PMID:31719172]. In cancer, ATOH8 represses stem-cell genes OCT4, NANOG, and CD133 to limit hepatocellular tumor-initiating properties [PMID:26099525], and its nuclear translocation is promoted by calcineurin (PPP3CB), after which it represses Sp1 to suppress pancreatic cancer metastasis [PMID:40222712]. ATOH8 itself is a tightly controlled node: it is transcriptionally silenced by EZH2-mediated H3K27me3 and promoter DNA methylation [PMID:30786928, PMID:40133667], destabilized post-transcriptionally by FXR1 binding its 3'UTR [PMID:39511680] and by WTAP-dependent m6A modification [PMID:40399698]. Beyond transcriptional repression, ATOH8 binds autophagosome-assembly genes and promotes autophagic flux [PMID:41440013].","teleology":[{"year":2010,"claim":"Established that Atoh8 is developmentally required for tissue patterning, providing the first in vivo phenotype linking the factor to retinal lamination and muscle fiber differentiation.","evidence":"Morpholino knockdown in zebrafish with in situ hybridization and histology","pmids":["20532172"],"confidence":"Low","gaps":["Morpholino phenotypes not confirmed by genetic mutant or rescue","No molecular target or mechanism identified","Direct transcriptional activity not addressed"]},{"year":2013,"claim":"Defined ATOH8 as a direct E-box-binding transcription factor and resolved its dual regulatory logic—direct HAMP activation versus intrinsic repressor activity at E47-dependent targets.","evidence":"ChIP, reporter mutagenesis, domain deletion, and Co-IP in hepatic and pancreatic cell models","pmids":["24236640","23938248"],"confidence":"High","gaps":["Did not reconcile when ATOH8 activates versus represses a given locus","Cofactor selection rules unresolved","No structural basis for the proline-rich repressor domain"]},{"year":2014,"claim":"Connected ATOH8 to mechanotransduction by showing it is shear-stress-responsive and directly activates eNOS to drive endothelial differentiation.","evidence":"hESC-to-endothelial induction with eNOS reporter assays and zebrafish/mouse in situ hybridization","pmids":["24463812"],"confidence":"Medium","gaps":["Single lab","Upstream sensor coupling shear stress to ATOH8 not defined","Direct binding to eNOS promoter shown by reporter but not ChIP in this study"]},{"year":2015,"claim":"Identified ATOH8 as a tumor suppressor that represses stem-cell genes (OCT4, NANOG, CD133), explaining how its loss enables cancer stem-cell properties.","evidence":"EMSA, reporter assays, overexpression/knockdown, and xenografts in HCC cell lines","pmids":["26099525"],"confidence":"High","gaps":["Cofactors at stemness promoters not identified","Whether repression is direct at all three loci not fully resolved"]},{"year":2019,"claim":"Placed ATOH8 in the BMP-SMAD1/5 axis as a direct target and identified HIF-2α as a protein partner whose abundance it lowers, linking ATOH8 to hypoxia signaling and pulmonary vascular homeostasis.","evidence":"Co-IP, reporter assays, knockout mice with hemodynamics, and zebrafish","pmids":["31719172"],"confidence":"High","gaps":["Mechanism by which ATOH8 reduces HIF-2α abundance not defined","Whether this is transcription-independent unclear"]},{"year":2019,"claim":"Showed ATOH8 expression is silenced epigenetically by EZH2 via H3K27me3 and DNA methylation, establishing an upstream repression mechanism controlling ATOH8 levels in cancer.","evidence":"ChIP and bisulfite sequencing downstream of a Lnc-PDZD7/miR-101/EZH2 axis in HCC","pmids":["30786928"],"confidence":"Medium","gaps":["Single lab","Direct EZH2 recruitment to ATOH8 promoter not shown in this study"]},{"year":2019,"claim":"Extended ATOH8's developmental role to endochondral bone, showing it regulates chondrocyte proliferation and hypertrophy relative to Ihh signaling.","evidence":"Conditional/germline knockout mice with Purmorphamine Ihh-pathway epistasis","pmids":["31449527"],"confidence":"Medium","gaps":["Direct targets in chondrocytes not identified","Whether Ihh is a direct ATOH8 target unresolved"]},{"year":2020,"claim":"Defined ATOH8 as a SMAD1-coupled brake on osteoclastogenesis via a Runx2 complex that lowers the Rankl/Opg ratio.","evidence":"Co-IP of Atoh8-Runx2, knockout mice, osteoclastogenesis assays, and Runx2 knockdown epistasis","pmids":["32923015"],"confidence":"High","gaps":["Whether ATOH8 binds DNA or only sequesters Runx2 not distinguished","Genomic targets of the complex not mapped"]},{"year":2020,"claim":"Revealed a context where ATOH8 is pro-tumorigenic—a VEGFR2/AKT axis upregulates ATOH8 to activate HK2 and glycolysis, supporting circulating tumor cell survival.","evidence":"Shear-stress system, glycolysis/anoikis assays, and pathway inhibitor experiments","pmids":["32000836"],"confidence":"Medium","gaps":["Direct binding to HK2 promoter not shown","Single lab","Reconciliation with ATOH8's tumor-suppressive contexts unaddressed"]},{"year":2021,"claim":"Identified additional epigenetic and isoform-level control: lncRNA CIR recruits EZH2 to silence ATOH8 in MSCs, and an ATOH8-V1 isoform activates RhoC to drive metastasis.","evidence":"RNA-IP/biotin pull-down and ChIP in MSCs; ChIP and reporter assays for ATOH8-V1/RhoC","pmids":["33546582","33049034"],"confidence":"Medium","gaps":["Functional distinction between ATOH8 isoforms incompletely mapped","Single lab for each"]},{"year":2021,"claim":"Showed ATOH8 restrains differentiation programs in immune and epithelial contexts, limiting intestinal M cell maturation under PRC2 control.","evidence":"Atoh8 knockout mice and RankL-treated intestinal organoids","pmids":["34502262"],"confidence":"Medium","gaps":["Direct ATOH8 targets in M cell program not identified","Single lab"]},{"year":2022,"claim":"Generalized ATOH8's role to a genome-wide enhancer-binding restraint on cellular plasticity within a c-Myc/Atoh8/Sfrp1 axis, beyond any single cell identity.","evidence":"Single-cell multiomics with enhancer-binding analysis during reprogramming and transformation","pmids":["36075976"],"confidence":"Medium","gaps":["Precise enhancer recognition code unresolved","How c-Myc and Atoh8 antagonize at shared loci not defined"]},{"year":2023,"claim":"Established the SMAD3-ATOH8 repressive complex as the effector of oncogene-induced senescence and a tumor-suppressive brake on Ras-driven lung cancer with pharmacological relevance.","evidence":"Co-IP, ChIP-seq/reporter assays, knockout mice with oncogenic Ras, and SMAD3 inhibitor treatment","pmids":["36626550"],"confidence":"High","gaps":["SMAD2/SMAD4 exclusion mechanism not structurally explained","Full cell-cycle target set not enumerated"]},{"year":2023,"claim":"Positioned ATOH8 as an upstream BMP2/cAMP-induced nuclear regulator of the WNT/FZD-FOXO1 decidualization program in endometrial stromal cells.","evidence":"siRNA/overexpression with BMP2/ALK inhibitors, cAMP analogue, and nuclear-localization imaging","pmids":["38060684"],"confidence":"Medium","gaps":["Whether FZD4/FOXO1 are direct targets not shown","Single lab"]},{"year":2024,"claim":"Added post-transcriptional control by showing FXR1 binds the ATOH8 3'UTR to promote its mRNA degradation in esophageal cancer.","evidence":"3'UTR interaction and mRNA stability assays with FXR1 perturbation","pmids":["39511680"],"confidence":"Medium","gaps":["Whether degradation requires additional decay machinery unclear","Single lab"]},{"year":2025,"claim":"Defined a TCF3-ATOH8 repressive complex at SCD that controls ferroptosis sensitivity, and reaffirmed EZH2-driven silencing of ATOH8 in this axis.","evidence":"Co-IP, SCD reporter assays, ChIP for EZH2/H3K27me3, and ferroptosis assays in vitro and in vivo","pmids":["40133667"],"confidence":"Medium","gaps":["Relative contribution of TCF3 versus E47 as ATOH8 partners not compared","Single lab"]},{"year":2025,"claim":"Identified calcineurin (PPP3CB) as a regulator of ATOH8 nuclear translocation enabling Sp1 repression and metastasis suppression in pancreatic cancer.","evidence":"Co-IP validated by mass spectrometry, ChIP-seq, reporter assays, nuclear-localization imaging, and xenografts","pmids":["40222712"],"confidence":"Medium","gaps":["Whether PPP3CB dephosphorylates ATOH8 directly not shown","Single lab"]},{"year":2025,"claim":"Connected ATOH8 loss to renal disease through TGF-β/SMAD pathway derepression (podocytes/FSGS) and uncovered WTAP-dependent m6A as another layer of ATOH8 mRNA control (mesangial cells/diabetic nephropathy).","evidence":"shRNA knockdown with SMAD reporter/imaging plus adriamycin nephropathy mice; MeRIP-Seq with WTAP knockdown and db/db model","pmids":["41545031","40399698"],"confidence":"Medium","gaps":["Direct ATOH8 targets restraining TGF-β output not mapped","m6A reader mediating Atoh8 destabilization not identified","Single lab each"]},{"year":2025,"claim":"Expanded ATOH8 function beyond transcriptional repression by showing direct binding to autophagosome-assembly genes and a role in sustaining autophagic flux, and confirmed a role in extravillous trophoblast differentiation.","evidence":"Cut&Tag and autophagy-marker westerns in myoblasts/ESCs; siRNA/RNA-seq and invasion assays in human trophoblast stem cells","pmids":["41440013","41188410"],"confidence":"Medium","gaps":["Whether autophagy genes are activated or repressed by ATOH8 not fully clarified","Direct EVT target genes not defined","Single lab each"]},{"year":null,"claim":"It remains unresolved what determines ATOH8's switch between activator and repressor at a given locus, and how its many cofactor partnerships (E47, SMAD3, SMAD1/5, Runx2, TCF3, HIF-2α) are selected in a tissue- and signal-specific manner.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No structural model of ATOH8 cofactor complexes","No unified genome-wide binding map across cell types","Functional distinction among ATOH8 isoforms incompletely characterized"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[0,1,4,6,11,14,15]},{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[0,6,11,13,15,21]},{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[1,2,3,4,14]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[15,19]}],"pathway":[{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[2,3,4,18]},{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[0,4,6,11,14,15]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[4,6,7,11,15]},{"term_id":"R-HSA-9612973","term_label":"Autophagy","supporting_discovery_ids":[21]}],"complexes":[],"partners":["E47","SMAD3","RUNX2","HIF-2A","TCF3","PPP3CB","CYP3A5","FXR1"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q96SQ7","full_name":"Transcription factor ATOH8","aliases":["Class A basic helix-loop-helix protein 21","bHLHa21","Helix-loop-helix protein hATH-6","hATH6","Protein atonal homolog 8"],"length_aa":321,"mass_kda":34.6,"function":"Transcription factor that binds a palindromic (canonical) core consensus DNA sequence 5'-CANNTG- 3' known as an E-box element, possibly as a heterodimer with other bHLH proteins (PubMed:24236640). Regulates endothelial cell proliferation, migration and tube-like structures formation (PubMed:24463812). Modulates endothelial cell differentiation through NOS3 (PubMed:24463812). May be implicated in specification and differentiation of neuronal cell lineages in the brain (By similarity). May participate in kidney development and may be involved in podocyte differentiation (By similarity). During early embryonic development is involved in tissue-specific differentiation processes that are dependent on class II bHLH factors and namely modulates the differentiation program initiated by the pro-endocrine factor NEUROG3 (By similarity). During myogenesis, may play a role during the transition of myoblasts from the proliferative phase to the differentiation phase (By similarity). Positively regulates HAMP transcription in two ways, firstly by acting directly on the HAMP promoter via E-boxes binding and indirectly through increased phosphorylation of SMAD protein complex (PubMed:24236640). Repress NEUROG3-dependent gene activation in a gene-specific manner through at least two mechanisms; requires only either the sequestering of a general partner such as TCF3 through heterodimerization, either also requires binding of the bHLH domain to DNA via a basic motif (By similarity)","subcellular_location":"Nucleus; Nucleus speckle; Cytoplasm","url":"https://www.uniprot.org/uniprotkb/Q96SQ7/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/ATOH8","classification":"Not Classified","n_dependent_lines":3,"n_total_lines":1208,"dependency_fraction":0.0024834437086092716},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/ATOH8","total_profiled":1310},"omim":[{"mim_id":"619820","title":"ATONAL bHLH TRANSCRIPTION FACTOR 8; ATOH8","url":"https://www.omim.org/entry/619820"},{"mim_id":"606464","title":"HEPCIDIN ANTIMICROBIAL PEPTIDE; HAMP","url":"https://www.omim.org/entry/606464"},{"mim_id":"112266","title":"BONE MORPHOGENETIC PROTEIN 6; BMP6","url":"https://www.omim.org/entry/112266"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Supported","locations":[{"location":"Nucleoplasm","reliability":"Supported"}],"tissue_specificity":"Tissue enhanced","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"blood vessel","ntpm":16.2},{"tissue":"skeletal muscle","ntpm":17.2}],"url":"https://www.proteinatlas.org/search/ATOH8"},"hgnc":{"alias_symbol":["HATH6","FLJ14708","bHLHa21"],"prev_symbol":[]},"alphafold":{"accession":"Q96SQ7","domains":[],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q96SQ7","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q96SQ7-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q96SQ7-F1-predicted_aligned_error_v6.png","plddt_mean":65.0},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=ATOH8","jax_strain_url":"https://www.jax.org/strain/search?query=ATOH8"},"sequence":{"accession":"Q96SQ7","fasta_url":"https://rest.uniprot.org/uniprotkb/Q96SQ7.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q96SQ7/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q96SQ7"}},"corpus_meta":[{"pmid":"26099525","id":"PMC_26099525","title":"Loss of ATOH8 Increases Stem Cell Features of Hepatocellular Carcinoma 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overexpression inhibits the tumor progression and monocyte chemotaxis in hepatocellular carcinoma.","date":"2020","source":"International journal of clinical and experimental pathology","url":"https://pubmed.ncbi.nlm.nih.gov/33165366","citation_count":9,"is_preprint":false},{"pmid":"34502262","id":"PMC_34502262","title":"PRC2 Regulated Atoh8 Is a Regulator of Intestinal Microfold Cell (M Cell) Differentiation.","date":"2021","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/34502262","citation_count":8,"is_preprint":false},{"pmid":"33163265","id":"PMC_33163265","title":"CYP3A5 suppresses metastasis of lung adenocarcinoma through ATOH8/Smad1 axis.","date":"2020","source":"American journal of cancer research","url":"https://pubmed.ncbi.nlm.nih.gov/33163265","citation_count":7,"is_preprint":false},{"pmid":"34402594","id":"PMC_34402594","title":"Targeted deletion of Atoh8 results in severe hearing loss in mice.","date":"2021","source":"Genesis 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Renal physiology","url":"https://pubmed.ncbi.nlm.nih.gov/41545031","citation_count":0,"is_preprint":false},{"pmid":"41188410","id":"PMC_41188410","title":"ATOH8 is crucial for the differentiation of human trophoblast stem cells into extravillous trophoblasts.","date":"2025","source":"Scientific reports","url":"https://pubmed.ncbi.nlm.nih.gov/41188410","citation_count":0,"is_preprint":false},{"pmid":"38651683","id":"PMC_38651683","title":"LncRNA RP11-301G19.1 is required for the maintenance of vascular smooth muscle cell contractile phenotype via sponging miR-17-5P/ATOH8 axis.","date":"2024","source":"IUBMB life","url":"https://pubmed.ncbi.nlm.nih.gov/38651683","citation_count":0,"is_preprint":false},{"pmid":null,"id":"bio_10.1101_2024.11.01.621572","title":"DJ-1 deficiency in SH-SY5Y cells reveals dysregulated networks of genes and pathways involved in neuronal function and disease","date":"2024-11-01","source":"bioRxiv","url":"https://doi.org/10.1101/2024.11.01.621572","citation_count":0,"is_preprint":true},{"pmid":null,"id":"bio_10.1101_2025.11.25.690307","title":"An Integrated Single-Cell Atlas Reveals Hepatic Stellate Cell Heterogeneity and Spatiotemporal Dynamics after Liver Injury","date":"2025-11-29","source":"bioRxiv","url":"https://doi.org/10.1101/2025.11.25.690307","citation_count":0,"is_preprint":true}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":24911,"output_tokens":6851,"usd":0.088749,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":15925,"output_tokens":5888,"usd":0.113412,"stage2_stop_reason":"end_turn"},"total_usd":0.202161,"stage1_batch_id":"msgbatch_0179Z2pxRYBsXi2xADneafRw","stage2_batch_id":"msgbatch_01LaY9ZaVdgjWArcZo9eqQE5","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2013,\n      \"finding\": \"ATOH8 activates HAMP (hepcidin) transcription by directly binding E-box regions within the HAMP promoter (shown by ChIP assay), and also indirectly through BMP signaling by increasing phosphorylated SMAD1/5/8 levels; mutation of E-box or SMAD response elements in the HAMP promoter significantly reduced ATOH8-mediated activation.\",\n      \"method\": \"Chromatin immunoprecipitation (ChIP), luciferase reporter assay, site-directed mutagenesis of promoter elements, western blot for pSMAD1/5/8\",\n      \"journal\": \"British journal of haematology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — multiple orthogonal methods (ChIP, reporter mutagenesis, western blot) in a single study establishing direct binding and transcriptional activation\",\n      \"pmids\": [\"24236640\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"ATOH8 lacks a canonical transactivation domain and possesses intrinsic repressor activity dependent on a conserved Proline-rich domain. ATOH8 binds the ubiquitous E protein E47 and inhibits E47/E47 and Neurogenin3/E47 dimer transcriptional activities, thereby blocking induction of a subset of proendocrine gene targets.\",\n      \"method\": \"Reporter assays, domain deletion/mutagenesis, co-immunoprecipitation, global gene expression profiling in pancreatic mPAC cells\",\n      \"journal\": \"Biochimica et biophysica acta\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — domain mutagenesis identifying repressor domain plus Co-IP of E47 binding and functional reporter assays, multiple orthogonal methods in one study\",\n      \"pmids\": [\"23938248\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"ATOH8 is a direct transcriptional target of the BMP-SMAD1/5 axis in endothelial cells; ATOH8 induction by BMP is independent of Notch signaling. ATOH8 protein interacts with HIF-2α and decreases its abundance, leading to reduced transcription of HIF-2α target genes under hypoxia. Atoh8-deficient mice develop a pulmonary arterial hypertension-like phenotype (increased pulmonary arterial pressure, right ventricular hypertrophy).\",\n      \"method\": \"Co-immunoprecipitation (ATOH8–HIF-2α interaction), reporter assays, genetic knockout mice, in vivo hemodynamic measurements, zebrafish studies\",\n      \"journal\": \"Science signaling\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal Co-IP plus in vivo knockout phenotyping and multiple signaling pathway analyses across two organisms\",\n      \"pmids\": [\"31719172\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"BMP-SMAD1 signaling directly upregulates Atoh8 in osteoblasts. Atoh8 forms a protein complex with Runx2 to inhibit Runx2 transcriptional activity, thereby reducing the Rankl/Opg expression ratio in osteoblasts and suppressing osteoclastogenesis. Atoh8-null marrow stroma cells were more potent than wild-type cells in inducing osteoclastogenesis.\",\n      \"method\": \"Co-immunoprecipitation (Atoh8–Runx2 complex), gene expression analysis, Atoh8 global knockout mice, marrow stromal cell osteoclastogenesis assays, Runx2 knockdown epistasis\",\n      \"journal\": \"Bone research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP of Atoh8-Runx2 complex plus in vivo knockout and epistasis by Runx2 knockdown rescue of Rankl/Opg ratio\",\n      \"pmids\": [\"32923015\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"ATOH8 binds SMAD3 (but not SMAD2 or SMAD4) to form a transcriptional repressive complex that directly represses cell cycle-promoting genes, causing oncogene-induced senescence in lung epithelial cells downstream of TGF-β1/SMAD3 activation. Depleting Atoh8 accelerates oncogenic Ras-driven lung tumorigenesis in vivo, and lung cancers driven by mutant Ras plus Atoh8 loss are sensitive to a specific SMAD3 inhibitor.\",\n      \"method\": \"Co-immunoprecipitation (ATOH8–SMAD3), ChIP-seq/reporter assays for target gene repression, Atoh8 knockout mice with oncogenic Ras, SMAD3 inhibitor treatment\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal Co-IP plus in vivo genetic epistasis (Atoh8 loss + Ras) and pharmacological validation, multiple orthogonal methods\",\n      \"pmids\": [\"36626550\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"ATOH8 (Hath6) acts as a shear-stress-responsive transcription factor in endothelial cells. Overexpression of Hath6 (mimicking shear stress) increases endothelial differentiation markers (CD45−CD31+KDR+ population, tubular structure formation) and endothelial gene expression. The eNOS gene is a direct transcriptional target of Hath6, demonstrated by reporter assay; inhibition of eNOS diminishes hESC-to-endothelial cell differentiation.\",\n      \"method\": \"Gain- and loss-of-function in hESC-EC induction system, luciferase reporter assay for eNOS promoter, western blot, in situ hybridization in zebrafish and mouse embryos\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reporter assay establishing direct eNOS targeting plus functional rescue, but single lab\",\n      \"pmids\": [\"24463812\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"ATOH8 represses transcription of stem-cell-associated genes OCT4, NANOG, and CD133 in hepatocellular carcinoma cells, as demonstrated by mobility shift and luciferase reporter assays. Transgenic ATOH8 expression reduces CD133+ cell populations, tumor formation, and invasion, while ATOH8 knockdown causes CD133-negative cells to acquire stem-cell properties.\",\n      \"method\": \"Electrophoretic mobility shift assay (EMSA), luciferase reporter assay, lentiviral overexpression and siRNA knockdown, xenograft tumor assays, flow cytometry\",\n      \"journal\": \"Gastroenterology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — EMSA and reporter assays for direct DNA binding plus replicated in multiple HCC cell lines and in vivo xenograft models\",\n      \"pmids\": [\"26099525\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"In response to laminar shear stress, VEGF is released by circulating colorectal cancer cells, activating a VEGFR2/AKT signaling axis that upregulates ATOH8 expression. ATOH8 then transcriptionally activates HK2, promoting glycolysis and intravascular survival of tumor cells.\",\n      \"method\": \"Western blotting, quantitative PCR, immunofluorescence, glycolysis assay, anoikis assay, cyclic laminar shear stress system, pathway inhibitor experiments\",\n      \"journal\": \"Journal of experimental & clinical cancer research : CR\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple functional assays establishing pathway axis (VEGFR2/AKT→ATOH8→HK2), single lab\",\n      \"pmids\": [\"32000836\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"EZH2 represses ATOH8 expression in HCC cells via H3K27 trimethylation and DNA methylation of the ATOH8 promoter, as demonstrated by chromatin immunoprecipitation and bisulfite genomic sequencing. This mechanism operates downstream of the Lnc-PDZD7/miR-101/EZH2 axis.\",\n      \"method\": \"Chromatin immunoprecipitation (ChIP), bisulfite genomic sequencing, dual-luciferase reporter assay, western blot\",\n      \"journal\": \"Journal of experimental & clinical cancer research : CR\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP and bisulfite sequencing establishing epigenetic repression mechanism, single lab with two orthogonal methods\",\n      \"pmids\": [\"30786928\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"LncRNA CIR binds EZH2 (shown by RNA immunoprecipitation and biotin pull-down) and recruits it to the ATOH8 promoter, resulting in EZH2-mediated H3K27me3 and methylation-based repression of ATOH8 in mesenchymal stem cells. Loss of lncRNA CIR or overexpression of ATOH8 promotes chondrogenic differentiation; inhibition of ATOH8 reverses effects of lncRNA CIR knockdown.\",\n      \"method\": \"RNA immunoprecipitation, biotin pull-down, ChIP, western blot, qRT-PCR, gain/loss-of-function in hUC-MSCs\",\n      \"journal\": \"Molecular medicine (Cambridge, Mass.)\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — RNA-IP and biotin pulldown of lncRNA-EZH2 interaction and ChIP of H3K27me3 at ATOH8 promoter, epistasis by ATOH8 rescue, single lab\",\n      \"pmids\": [\"33546582\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"EBV-encoded LMP1 inhibits ATOH8 expression in nasopharyngeal carcinoma cells by epigenetically reducing activating H3K4me3 and increasing repressive H3K27me3 occupancy on the ATOH8 promoter, as shown by ChIP assay. ATOH8 restoration reverses the LMP1-induced malignant phenotype.\",\n      \"method\": \"ChIP assay for H3K4me3 and H3K27me3, gain/loss-of-function assays, western blot, real-time PCR\",\n      \"journal\": \"Oncotarget\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP for two histone marks at ATOH8 promoter plus functional rescue, single lab\",\n      \"pmids\": [\"27049918\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"A novel isoform, ATOH8-V1, directly binds the RhoC promoter and transcriptionally activates RhoC expression, thereby enhancing metastasis of breast cancer cells.\",\n      \"method\": \"ChIP assay, luciferase reporter assay, overexpression and silencing of ATOH8-V1, metastasis assays\",\n      \"journal\": \"Journal of molecular cell biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP and reporter assay establishing direct promoter binding and transcriptional activation of RhoC, single lab\",\n      \"pmids\": [\"33049034\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Atoh8 regulates chondrocyte proliferation and hypertrophic differentiation in endochondral bones. Atoh8 deletion (chondrocyte-specific and germline) leads to reduced zones of proliferating and hypertrophic chondrocytes and shorter bones. Atoh8 acts on the onset of hypertrophy upstream of Ihh (likely modulating Ihh expression), while regulating chondrocyte proliferation in parallel or downstream of Ihh signaling (demonstrated by Purmorphamine activation of Ihh pathway).\",\n      \"method\": \"Conditional and germline Atoh8 knockout mice (Col2a1-Cre; Prx1-Cre), histological analysis, Purmorphamine (Ihh agonist) epistasis experiment, molecular marker analysis\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic epistasis via pharmacological Ihh activation in Atoh8 knockout background, in vivo conditional KO, single lab\",\n      \"pmids\": [\"31449527\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"Atoh8 restrains cellular plasticity (reprogramming and oncogenic transformation) independently of cellular identity by binding a specific enhancer network, as part of a c-Myc/Atoh8/Sfrp1 regulatory axis identified by multiomics characterization at single-cell resolution.\",\n      \"method\": \"Single-cell multiomics (scRNA-seq, epigenomics), chromatin binding analysis of enhancer networks, genetic perturbation during reprogramming and transformation\",\n      \"journal\": \"Nature cell biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiomics with enhancer binding characterization, single study with multiple orthogonal approaches\",\n      \"pmids\": [\"36075976\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"ATOH8 suppresses SCD (stearoyl-CoA desaturase) transcription, sensitizing tumor cells to ferroptosis. TCF3 acts as a co-factor with ATOH8, forming a TCF3-ATOH8 transcriptional repressive complex at the SCD locus. EZH2 epigenetically suppresses ATOH8 expression via DNA methylation of the ATOH8 promoter and H3K27me3 elevation.\",\n      \"method\": \"Overexpression/deletion of ATOH8 in tumor cells, reporter assays for SCD transcription, co-immunoprecipitation of TCF3-ATOH8 complex, ChIP for EZH2/H3K27me3 at ATOH8 promoter, ferroptosis sensitivity assays in vitro and in vivo\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP of TCF3-ATOH8 complex plus ChIP and functional reporter assays, multiple orthogonal methods in one study, single lab\",\n      \"pmids\": [\"40133667\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"PPP3CB (calcineurin) physically interacts with ATOH8 (shown by co-immunoprecipitation confirmed by mass spectrometry) and promotes ATOH8 nuclear translocation in pancreatic cancer cells. Nuclear ATOH8 binds the Sp1 promoter (shown by ChIP-seq and luciferase assay) and transcriptionally inhibits Sp1, suppressing pancreatic cancer metastasis.\",\n      \"method\": \"Liquid chromatography-tandem mass spectrometry, co-immunoprecipitation, ChIP-seq, luciferase reporter assay, immunofluorescence/confocal microscopy for nuclear translocation, xenograft mouse models\",\n      \"journal\": \"Life sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP validated by MS, ChIP-seq confirming Sp1 promoter binding, nuclear localization by imaging, single lab\",\n      \"pmids\": [\"40222712\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"FXR1 (RNA-binding protein) binds the 3'UTR of ATOH8 mRNA and promotes its degradation, negatively regulating ATOH8 at the post-transcriptional level in esophageal cancer cells.\",\n      \"method\": \"Direct 3'UTR interaction assay, mRNA stability assay, FXR1 knockdown/overexpression experiments, in vitro and in vivo functional assays\",\n      \"journal\": \"Biology direct\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct 3'UTR binding shown with functional mRNA stability outcomes, single lab\",\n      \"pmids\": [\"39511680\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"WTAP methyltransferase promotes m6A modification of Atoh8 mRNA, reducing its stability and expression in mesangial cells. Reduced Atoh8 promotes mesangial cell proliferation and fibrosis in diabetic nephropathy; overexpression of Atoh8 restrained these processes.\",\n      \"method\": \"MeRIP-Seq combined with RNA-Seq, WTAP knockdown, Atoh8 overexpression in mouse mesangial cells, db/db mouse model\",\n      \"journal\": \"Cell biochemistry and biophysics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — MeRIP-Seq identifying m6A on Atoh8 mRNA plus functional validation, single lab\",\n      \"pmids\": [\"40399698\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"Loss of ATOH8 in podocytes activates TGF-β signaling: ATOH8-knockdown podocytes show SMAD2/3 nuclear translocation, increased SMAD transcriptional activity (luciferase assay), upregulated TGFB1 mRNA, and increased extracellular matrix gene expression even without exogenous TGF-β. In vivo, Atoh8-deficient mice develop more severe glomerulosclerosis in an adriamycin-induced FSGS model.\",\n      \"method\": \"shRNA knockdown, RNA sequencing, SMAD2/3 localization imaging, SMAD luciferase reporter assay, Atoh8 knockout mouse + adriamycin nephropathy model\",\n      \"journal\": \"American journal of physiology. Renal physiology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple in vitro methods (RNAseq, reporter, imaging) plus in vivo epistasis, single lab\",\n      \"pmids\": [\"41545031\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"BMP2 (via ALK2/3 receptor) and cAMP signaling upregulate ATOH8 expression during human endometrial stromal fibroblast (ESF) decidualization. ATOH8 protein localizes predominantly to the nucleus in decidualizing cells. ATOH8 silencing reduces FZD4 and FOXO1 expression and downstream FOXO1 targets, placing ATOH8 as a major upstream regulator of the WNT/FZD-FOXO1 pathway in decidualization.\",\n      \"method\": \"siRNA knockdown and overexpression of ATOH8, BMP2/ALK2/3 inhibitor treatment, cAMP analogue treatment, immunofluorescence for nuclear localization, qRT-PCR and western blot\",\n      \"journal\": \"Endocrinology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — nuclear localization confirmed by immunofluorescence, pathway placement by knockdown with marker readouts, single lab\",\n      \"pmids\": [\"38060684\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"PRC2-regulated Atoh8 restrains intestinal M cell differentiation: Atoh8 null mice showed a significant increase in mature M cells (Gp2+), M cell-associated markers (Spi-B, Sox8), and increased transcytosis of luminal antigens in Peyer's patches.\",\n      \"method\": \"Atoh8 knockout mice, RankL-treated intestinal organoids, immunofluorescence, in vitro organoid analysis\",\n      \"journal\": \"International journal of molecular sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo knockout plus organoid analysis, single lab\",\n      \"pmids\": [\"34502262\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"Loss of Atoh8 impairs macroautophagy: Atoh8-null primary myoblasts and mouse embryonic stem cells show differential LC3B-II expression, TFEB levels, and accumulation of p62 (autophagy cargo receptor). Cut&Tag sequencing in Atoh8-overexpressing C2C12 cells revealed Atoh8 binding to multiple genes involved in autophagosome assembly. Atoh8 overexpression increases autophagic flux while its loss disrupts it.\",\n      \"method\": \"Western blot for autophagy markers (LC3B-II, p62, TFEB), mass spectrometry proteomics, Cut&Tag sequencing for chromatin binding in Atoh8-overexpressing cells, Atoh8 knockout myoblasts and ESCs\",\n      \"journal\": \"Cells\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple orthogonal methods (western blot for autophagy markers, MS proteomics, Cut&Tag for direct binding), single lab\",\n      \"pmids\": [\"41440013\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"Atoh8 is required for retinal lamination and skeletal muscle fiber differentiation in zebrafish. Morpholino-mediated knockdown results in reduced eye size with disorganization of retinal lamination and disrupted arrangement of paraxial cells and differentiated muscle fibers during somite morphogenesis.\",\n      \"method\": \"Morpholino knockdown in zebrafish, whole-mount in situ hybridization, histological analysis of retina and somites\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — morpholino knockdown in zebrafish (morpholino phenotypes later disputed by PMID 28182631 genetic mutant study); single lab, no rescue\",\n      \"pmids\": [\"20532172\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"ATOH8 is required for extravillous trophoblast (EVT) differentiation from human trophoblast stem cells. ATOH8 knockdown during EVT differentiation causes morphological abnormalities, impaired EVT marker expression, sustained TSC marker expression, and abolished invasive capacity, while disrupting extracellular matrix organization and PI3K-AKT signaling pathways. ATOH8 functions within a cooperative transcriptional network of EVT regulators, reciprocally regulating their expression.\",\n      \"method\": \"ATOH8 siRNA knockdown and overexpression in human TSCs, transcriptomic profiling (RNA-seq), invasion assays, marker expression analysis\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — transcriptome-wide profiling plus functional invasion assays and reciprocal regulation analysis, single lab\",\n      \"pmids\": [\"41188410\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"GDF5 promotes neuronal differentiation of retinal stem cells through activation of Smad signaling, and this effect is mediated by Atoh8; Atoh8 modulates the GDF5-induced neurogenesis and neurite outgrowth.\",\n      \"method\": \"Retinal stem cell differentiation assay, Atoh8 gain/loss-of-function, Smad signaling pathway analysis\",\n      \"journal\": \"Journal of cellular physiology\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single lab, limited mechanistic detail in abstract, pathway placement by single assay\",\n      \"pmids\": [\"31066042\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"CYP3A5 interacts with ATOH8 by co-immunoprecipitation in lung adenocarcinoma cells, and this interaction mediates inactivation of the Smad1 phosphorylation pathway, suppressing metastasis.\",\n      \"method\": \"Co-immunoprecipitation, high-throughput phosphorylation chip, western blot, in vitro migration/invasion assays, in vivo metastasis model\",\n      \"journal\": \"American journal of cancer research\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single Co-IP identifying interaction plus phospho-chip data, single lab, limited mechanistic detail\",\n      \"pmids\": [\"33163265\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"ATOH8 is a bHLH transcription factor that can act as both a transcriptional activator and repressor: it directly binds E-box elements in target gene promoters (e.g., HAMP, SCD, Sp1, RhoC, eNOS) and interacts with multiple protein partners (E47, SMAD3, SMAD1/5, HIF-2α, Runx2, TCF3, PPP3CB, CYP3A5) to regulate iron homeostasis, cellular senescence, ferroptosis sensitivity, osteoclastogenesis, pulmonary arterial hypertension, endothelial differentiation, and cancer stem cell properties; its expression is itself regulated by BMP-SMAD signaling, EZH2-mediated H3K27me3 and DNA methylation, m6A modification via WTAP, and post-transcriptional degradation by FXR1.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"ATOH8 is a basic helix-loop-helix transcription factor that operates downstream of BMP-SMAD and TGF-β signaling to constrain cellular plasticity, differentiation, and metabolic programs across multiple tissues [#2, #4, #13]. It lacks a canonical transactivation domain and carries intrinsic repressor activity dependent on a conserved proline-rich domain; it binds the ubiquitous E protein E47 and quenches E47- and Neurogenin3-driven transcription [#1]. ATOH8 acts directly on chromatin through E-box recognition—activating HAMP (hepcidin) and the eNOS promoter [#0, #5] and an ATOH8-V1 isoform activating RhoC [#11]—while functioning as a repressor at cell-cycle, stemness, and metabolic loci by partnering with sequence- and signal-specific cofactors: SMAD3 to drive oncogene-induced senescence and restrain Ras-driven lung tumorigenesis [#4], Runx2 to lower the Rankl/Opg ratio and suppress osteoclastogenesis [#3], and TCF3 to repress SCD and sensitize tumor cells to ferroptosis [#14]. It also binds and destabilizes HIF-2α, and Atoh8-deficient mice develop a pulmonary arterial hypertension-like phenotype [#2]. In cancer, ATOH8 represses stem-cell genes OCT4, NANOG, and CD133 to limit hepatocellular tumor-initiating properties [#6], and its nuclear translocation is promoted by calcineurin (PPP3CB), after which it represses Sp1 to suppress pancreatic cancer metastasis [#15]. ATOH8 itself is a tightly controlled node: it is transcriptionally silenced by EZH2-mediated H3K27me3 and promoter DNA methylation [#8, #14], destabilized post-transcriptionally by FXR1 binding its 3'UTR [#16] and by WTAP-dependent m6A modification [#17]. Beyond transcriptional repression, ATOH8 binds autophagosome-assembly genes and promotes autophagic flux [#21].\",\n  \"teleology\": [\n    {\n      \"year\": 2010,\n      \"claim\": \"Established that Atoh8 is developmentally required for tissue patterning, providing the first in vivo phenotype linking the factor to retinal lamination and muscle fiber differentiation.\",\n      \"evidence\": \"Morpholino knockdown in zebrafish with in situ hybridization and histology\",\n      \"pmids\": [\"20532172\"],\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Morpholino phenotypes not confirmed by genetic mutant or rescue\", \"No molecular target or mechanism identified\", \"Direct transcriptional activity not addressed\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Defined ATOH8 as a direct E-box-binding transcription factor and resolved its dual regulatory logic—direct HAMP activation versus intrinsic repressor activity at E47-dependent targets.\",\n      \"evidence\": \"ChIP, reporter mutagenesis, domain deletion, and Co-IP in hepatic and pancreatic cell models\",\n      \"pmids\": [\"24236640\", \"23938248\"],\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Did not reconcile when ATOH8 activates versus represses a given locus\", \"Cofactor selection rules unresolved\", \"No structural basis for the proline-rich repressor domain\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Connected ATOH8 to mechanotransduction by showing it is shear-stress-responsive and directly activates eNOS to drive endothelial differentiation.\",\n      \"evidence\": \"hESC-to-endothelial induction with eNOS reporter assays and zebrafish/mouse in situ hybridization\",\n      \"pmids\": [\"24463812\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Single lab\", \"Upstream sensor coupling shear stress to ATOH8 not defined\", \"Direct binding to eNOS promoter shown by reporter but not ChIP in this study\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Identified ATOH8 as a tumor suppressor that represses stem-cell genes (OCT4, NANOG, CD133), explaining how its loss enables cancer stem-cell properties.\",\n      \"evidence\": \"EMSA, reporter assays, overexpression/knockdown, and xenografts in HCC cell lines\",\n      \"pmids\": [\"26099525\"],\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Cofactors at stemness promoters not identified\", \"Whether repression is direct at all three loci not fully resolved\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Placed ATOH8 in the BMP-SMAD1/5 axis as a direct target and identified HIF-2α as a protein partner whose abundance it lowers, linking ATOH8 to hypoxia signaling and pulmonary vascular homeostasis.\",\n      \"evidence\": \"Co-IP, reporter assays, knockout mice with hemodynamics, and zebrafish\",\n      \"pmids\": [\"31719172\"],\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Mechanism by which ATOH8 reduces HIF-2α abundance not defined\", \"Whether this is transcription-independent unclear\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Showed ATOH8 expression is silenced epigenetically by EZH2 via H3K27me3 and DNA methylation, establishing an upstream repression mechanism controlling ATOH8 levels in cancer.\",\n      \"evidence\": \"ChIP and bisulfite sequencing downstream of a Lnc-PDZD7/miR-101/EZH2 axis in HCC\",\n      \"pmids\": [\"30786928\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Single lab\", \"Direct EZH2 recruitment to ATOH8 promoter not shown in this study\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Extended ATOH8's developmental role to endochondral bone, showing it regulates chondrocyte proliferation and hypertrophy relative to Ihh signaling.\",\n      \"evidence\": \"Conditional/germline knockout mice with Purmorphamine Ihh-pathway epistasis\",\n      \"pmids\": [\"31449527\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Direct targets in chondrocytes not identified\", \"Whether Ihh is a direct ATOH8 target unresolved\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Defined ATOH8 as a SMAD1-coupled brake on osteoclastogenesis via a Runx2 complex that lowers the Rankl/Opg ratio.\",\n      \"evidence\": \"Co-IP of Atoh8-Runx2, knockout mice, osteoclastogenesis assays, and Runx2 knockdown epistasis\",\n      \"pmids\": [\"32923015\"],\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Whether ATOH8 binds DNA or only sequesters Runx2 not distinguished\", \"Genomic targets of the complex not mapped\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Revealed a context where ATOH8 is pro-tumorigenic—a VEGFR2/AKT axis upregulates ATOH8 to activate HK2 and glycolysis, supporting circulating tumor cell survival.\",\n      \"evidence\": \"Shear-stress system, glycolysis/anoikis assays, and pathway inhibitor experiments\",\n      \"pmids\": [\"32000836\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Direct binding to HK2 promoter not shown\", \"Single lab\", \"Reconciliation with ATOH8's tumor-suppressive contexts unaddressed\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Identified additional epigenetic and isoform-level control: lncRNA CIR recruits EZH2 to silence ATOH8 in MSCs, and an ATOH8-V1 isoform activates RhoC to drive metastasis.\",\n      \"evidence\": \"RNA-IP/biotin pull-down and ChIP in MSCs; ChIP and reporter assays for ATOH8-V1/RhoC\",\n      \"pmids\": [\"33546582\", \"33049034\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Functional distinction between ATOH8 isoforms incompletely mapped\", \"Single lab for each\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Showed ATOH8 restrains differentiation programs in immune and epithelial contexts, limiting intestinal M cell maturation under PRC2 control.\",\n      \"evidence\": \"Atoh8 knockout mice and RankL-treated intestinal organoids\",\n      \"pmids\": [\"34502262\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Direct ATOH8 targets in M cell program not identified\", \"Single lab\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Generalized ATOH8's role to a genome-wide enhancer-binding restraint on cellular plasticity within a c-Myc/Atoh8/Sfrp1 axis, beyond any single cell identity.\",\n      \"evidence\": \"Single-cell multiomics with enhancer-binding analysis during reprogramming and transformation\",\n      \"pmids\": [\"36075976\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Precise enhancer recognition code unresolved\", \"How c-Myc and Atoh8 antagonize at shared loci not defined\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Established the SMAD3-ATOH8 repressive complex as the effector of oncogene-induced senescence and a tumor-suppressive brake on Ras-driven lung cancer with pharmacological relevance.\",\n      \"evidence\": \"Co-IP, ChIP-seq/reporter assays, knockout mice with oncogenic Ras, and SMAD3 inhibitor treatment\",\n      \"pmids\": [\"36626550\"],\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"SMAD2/SMAD4 exclusion mechanism not structurally explained\", \"Full cell-cycle target set not enumerated\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Positioned ATOH8 as an upstream BMP2/cAMP-induced nuclear regulator of the WNT/FZD-FOXO1 decidualization program in endometrial stromal cells.\",\n      \"evidence\": \"siRNA/overexpression with BMP2/ALK inhibitors, cAMP analogue, and nuclear-localization imaging\",\n      \"pmids\": [\"38060684\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Whether FZD4/FOXO1 are direct targets not shown\", \"Single lab\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Added post-transcriptional control by showing FXR1 binds the ATOH8 3'UTR to promote its mRNA degradation in esophageal cancer.\",\n      \"evidence\": \"3'UTR interaction and mRNA stability assays with FXR1 perturbation\",\n      \"pmids\": [\"39511680\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Whether degradation requires additional decay machinery unclear\", \"Single lab\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Defined a TCF3-ATOH8 repressive complex at SCD that controls ferroptosis sensitivity, and reaffirmed EZH2-driven silencing of ATOH8 in this axis.\",\n      \"evidence\": \"Co-IP, SCD reporter assays, ChIP for EZH2/H3K27me3, and ferroptosis assays in vitro and in vivo\",\n      \"pmids\": [\"40133667\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Relative contribution of TCF3 versus E47 as ATOH8 partners not compared\", \"Single lab\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Identified calcineurin (PPP3CB) as a regulator of ATOH8 nuclear translocation enabling Sp1 repression and metastasis suppression in pancreatic cancer.\",\n      \"evidence\": \"Co-IP validated by mass spectrometry, ChIP-seq, reporter assays, nuclear-localization imaging, and xenografts\",\n      \"pmids\": [\"40222712\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Whether PPP3CB dephosphorylates ATOH8 directly not shown\", \"Single lab\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Connected ATOH8 loss to renal disease through TGF-β/SMAD pathway derepression (podocytes/FSGS) and uncovered WTAP-dependent m6A as another layer of ATOH8 mRNA control (mesangial cells/diabetic nephropathy).\",\n      \"evidence\": \"shRNA knockdown with SMAD reporter/imaging plus adriamycin nephropathy mice; MeRIP-Seq with WTAP knockdown and db/db model\",\n      \"pmids\": [\"41545031\", \"40399698\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Direct ATOH8 targets restraining TGF-β output not mapped\", \"m6A reader mediating Atoh8 destabilization not identified\", \"Single lab each\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Expanded ATOH8 function beyond transcriptional repression by showing direct binding to autophagosome-assembly genes and a role in sustaining autophagic flux, and confirmed a role in extravillous trophoblast differentiation.\",\n      \"evidence\": \"Cut&Tag and autophagy-marker westerns in myoblasts/ESCs; siRNA/RNA-seq and invasion assays in human trophoblast stem cells\",\n      \"pmids\": [\"41440013\", \"41188410\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Whether autophagy genes are activated or repressed by ATOH8 not fully clarified\", \"Direct EVT target genes not defined\", \"Single lab each\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"It remains unresolved what determines ATOH8's switch between activator and repressor at a given locus, and how its many cofactor partnerships (E47, SMAD3, SMAD1/5, Runx2, TCF3, HIF-2α) are selected in a tissue- and signal-specific manner.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"No structural model of ATOH8 cofactor complexes\", \"No unified genome-wide binding map across cell types\", \"Functional distinction among ATOH8 isoforms incompletely characterized\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [0, 1, 4, 6, 11, 14, 15]},\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [0, 6, 11, 13, 15, 21]},\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [1, 2, 3, 4, 14]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [15, 19]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [2, 3, 4, 18]},\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [0, 4, 6, 11, 14, 15]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [4, 6, 7, 11, 15]},\n      {\"term_id\": \"R-HSA-9612973\", \"supporting_discovery_ids\": [21]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"E47\", \"SMAD3\", \"Runx2\", \"HIF-2A\", \"TCF3\", \"PPP3CB\", \"CYP3A5\", \"FXR1\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":7,"faith_total":7,"faith_pct":100.0}}