{"gene":"ZNF281","run_date":"2026-04-28T23:00:24","timeline":{"discoveries":[{"year":2013,"finding":"ZNF281 expression is directly induced by SNAIL at the transcriptional level and repressed by miR-34a/b/c (which is itself repressed by SNAIL), forming a coherent feed-forward loop. ZNF281 in turn directly activates SNAIL transcription, creating a regulatory circuit controlling EMT. p53 activation represses ZNF281 via miR-34a.","method":"Luciferase reporter assays, ChIP, miRNA target validation, gain/loss-of-function in CRC cells, mouse metastasis model","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 1-2 — multiple orthogonal methods (ChIP, reporter assays, gain/loss-of-function, in vivo metastasis), replicated across contexts","pmids":["24185900"],"is_preprint":false},{"year":2013,"finding":"ZNF281 directly activates SNAIL transcription and induces EMT markers, increases β-catenin activity, and promotes stemness marker expression (LGR5, CD133) in colorectal cancer cells. c-MYC induces ZNF281 protein expression in a SNAIL-dependent manner.","method":"Ectopic expression, knockdown, luciferase assays, ChIP, sphere formation, mouse lung metastasis model","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 1-2 — multiple orthogonal methods and in vivo validation in a single rigorous study","pmids":["24185900"],"is_preprint":false},{"year":2014,"finding":"ZNF281 physically interacts with the pluripotency transcription factors NANOG, OCT4, SOX2, and c-MYC.","method":"Co-immunoprecipitation (reported in review citing experimental data)","journal":"Journal of molecular medicine (Berlin, Germany)","confidence":"Medium","confidence_rationale":"Tier 3 — interaction reported in a review paper citing prior experimental work; no independent replication described here","pmids":["24838609"],"is_preprint":false},{"year":2015,"finding":"ZNF281 transcriptionally activates XRCC2 (homologous recombination) and XRCC4 (NHEJ) through direct DNA binding at their promoters, contributing to the cellular DNA damage response. This is dependent on its DNA-binding domain.","method":"Luciferase reporter assays, ChIP (chromatin immunoprecipitation), siRNA knockdown with comet assay for DNA repair, genotoxic stress (etoposide) treatment","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 1-2 — ChIP + reporter assays + functional comet assay with multiple orthogonal methods","pmids":["26300006"],"is_preprint":false},{"year":2017,"finding":"GSK-3β (but not GSK-3α) phosphorylates ZNF281 at a consensus TSGEHS motif (S638), which promotes ZNF281 interaction with the E3 ligase β-TrCP2, leading to ubiquitination and proteasomal degradation of ZNF281. A ZNF281-S638A mutant is resistant to this degradation. ZNF281 also transcriptionally represses β-TrCP2, forming a negative feedback loop.","method":"In vitro kinase assay, co-immunoprecipitation, ubiquitination assay, site-directed mutagenesis (S638A), Western blot, CRC cell lines","journal":"Oncotarget","confidence":"High","confidence_rationale":"Tier 1-2 — direct biochemical identification of phosphorylation site with mutagenesis validation and functional consequence","pmids":["29179460"],"is_preprint":false},{"year":2017,"finding":"ZNF281 promotes pancreatic cancer cell proliferation and invasion by directly binding β-catenin and decreasing its polyubiquitination, thereby activating Wnt/β-catenin signaling and downstream gene expression.","method":"Immunoprecipitation, Western blot, Topflash luciferase assay, ectopic expression/knockdown","journal":"Digestive diseases and sciences","confidence":"Medium","confidence_rationale":"Tier 2-3 — Co-IP and reporter assay in single study, moderate mechanistic depth","pmids":["28523575"],"is_preprint":false},{"year":2019,"finding":"ZNF281 is rapidly recruited to DNA double-strand break sites (within seconds of damage) via a mechanism dependent on its DNA-binding domain and, at least in part, on PARP activity. ZNF281 binds XRCC4 through its zinc-finger domain and facilitates XRCC4 recruitment to damage sites, promoting efficient NHEJ repair.","method":"Live-cell imaging, FRAP, laser micro-irradiation, co-immunoprecipitation, siRNA knockdown, NHEJ repair assay, PARP inhibitor treatment","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 1-2 — multiple orthogonal methods including live-cell kinetics, direct protein interaction, and functional NHEJ assay","pmids":["31570788"],"is_preprint":false},{"year":2019,"finding":"Zfp281 (mouse ortholog of ZNF281) physically associates with the master erythroid transcription factor GATA1, co-occupies chromatin sites with GATA1 and Zfp148, and regulates a common set of genes required for erythroid cell differentiation. Combined deficiency of Zfp148 and Zfp281 causes a marked erythroid maturation block.","method":"Co-immunoprecipitation, ChIP-seq, conditional knockout mouse model, knockdown studies","journal":"Blood advances","confidence":"High","confidence_rationale":"Tier 1-2 — reciprocal Co-IP, ChIP-seq, and in vivo genetic model with clear phenotype","pmids":["31455666"],"is_preprint":false},{"year":2019,"finding":"ZNF281 knockdown in colorectal cancer cells suppresses cell proliferation, migration, and invasion by inhibiting the Wnt/β-catenin pathway.","method":"siRNA knockdown, Transwell/wound healing assay, Western blot for Wnt/β-catenin pathway components","journal":"Cellular physiology and biochemistry","confidence":"Medium","confidence_rationale":"Tier 3 — loss-of-function with pathway readout, single lab without mechanistic depth beyond pathway association","pmids":["31112017"],"is_preprint":false},{"year":2019,"finding":"ZNF281/Zfp281 inhibits skeletal muscle differentiation induced by miR-1 and is a direct target of miR-1. Multiple miR binding sites in the 3'UTR of ZNF281/Zfp281 are functional for post-transcriptional regulation during differentiation.","method":"3'UTR reporter assays, miR-1 gain/loss-of-function, differentiation assays in muscle cell lines","journal":"Molecular oncology","confidence":"Medium","confidence_rationale":"Tier 2-3 — 3'UTR reporter and functional differentiation assays in single study","pmids":["31782884"],"is_preprint":false},{"year":2020,"finding":"ZNF281 transactivates the EMT-related transcription factors ZEB1 and SNAIL to promote TGF-β-induced breast cancer metastasis. ZEB1 and SNAIL in turn transcriptionally suppress miR-543, which targets ZNF281, forming a ZNF281–miR-543 feedback loop.","method":"Luciferase reporter assays, ChIP, gain/loss-of-function, in vitro and in vivo metastasis assays","journal":"Molecular therapy. Nucleic acids","confidence":"Medium","confidence_rationale":"Tier 2 — ChIP and reporter assays with in vivo validation, single lab","pmids":["32512343"],"is_preprint":false},{"year":2012,"finding":"ZNF281 binds to the promoter region of β-CATENIN and transcriptionally regulates it. Knockdown of ZNF281 in human multipotent stem cells results in spontaneous osteochondrogenic differentiation, while overexpression promotes proliferation.","method":"ChIP assay, gain/loss-of-function, in vivo subcutaneous implantation with β-TCP, molecular markers for differentiation","journal":"Cell transplantation","confidence":"Medium","confidence_rationale":"Tier 2 — ChIP plus in vivo functional validation, single lab","pmids":["22963690"],"is_preprint":false},{"year":2022,"finding":"SUFU binds ZNF281 and masks its nuclear localization signal, causing cytoplasmic retention of ZNF281 and thereby inhibiting ZNF281-mediated tumor cell migration and DNA damage repair gene activation. This is a Hedgehog-independent function of SUFU.","method":"Co-immunoprecipitation, subcellular fractionation/localization studies, NLS mutagenesis, migration assays, in vivo tumor model","journal":"Cell death and differentiation","confidence":"High","confidence_rationale":"Tier 1-2 — direct protein interaction plus mechanistic NLS masking demonstrated with mutagenesis and in vivo validation","pmids":["36220888"],"is_preprint":false},{"year":2022,"finding":"ZNF281 directly binds to the 5'-GGCGGCGGGCGG-3' motif within the HK2 promoter to transcriptionally repress HK2 expression, thereby reducing HK2-stabilized PINK1/Parkin-mediated mitophagy and driving ethanol-induced hepatocyte senescence.","method":"ChIP assay, promoter reporter assay, siRNA knockdown, adeno-associated virus (AAV) shRNA in vivo, mitophagy/senescence readouts","journal":"Cell proliferation","confidence":"High","confidence_rationale":"Tier 1-2 — ChIP with defined binding motif, in vivo AAV knockdown, multiple functional readouts","pmids":["36514923"],"is_preprint":false},{"year":2023,"finding":"ZNF281 suppresses transcription of the mitochondrial biogenesis factors TFAM, NRF1, and PGC-1α. ZNF281 also physically interacts with NRF1 and PGC-1α and is recruited to the promoters of TFAM, TFB1M, and TFB2M to repress their expression, thereby inhibiting mitochondrial biogenesis and facilitating HCC metastasis.","method":"Co-immunoprecipitation, ChIP assay, RNA-seq, knockdown/rescue experiments, OCR measurement, metabolomics","journal":"Cell death discovery","confidence":"High","confidence_rationale":"Tier 1-2 — ChIP + Co-IP + functional metabolic readouts + rescue experiments in single rigorous study","pmids":["37880213"],"is_preprint":false},{"year":2023,"finding":"ZNF281 recruits components of the NuRD complex (including HDAC1 and MTA1) to the ANXA10 promoter via direct binding to ZNF281 recognition sites, transcriptionally repressing the tumor suppressor ANXA10 and thereby promoting HCC invasion and metastasis. Knockdown of HDAC1 or MTA1 releases ANXA10 from repression and reverses ZNF281-driven EMT.","method":"ChIP assay, co-immunoprecipitation, RNA-seq, siRNA knockdown, transwell/migration assays, pulmonary metastasis model","journal":"Journal of hepatocellular carcinoma","confidence":"High","confidence_rationale":"Tier 1-2 — ChIP + Co-IP identifying specific complex components + in vivo metastasis model with mechanistic rescue","pmids":["37041757"],"is_preprint":false},{"year":2024,"finding":"ZNF281 upregulates RIPK1/RIPK3/MLKL necroptotic signaling in hepatocytes under lipotoxic stress. Activated MLKL translocates to mitochondrial membrane disrupting fatty acid β-oxidation and to the plasma membrane triggering lytic cell death, thereby promoting NASH progression. Hepatocyte-specific Zfp281 deficiency prevents NASH in mice.","method":"Hepatocyte-specific Zfp281 knockout mice, Western blot, immunofluorescence, metabolic phenotyping, histology, molecular biology","journal":"International immunopharmacology","confidence":"Medium","confidence_rationale":"Tier 2 — in vivo hepatocyte-specific KO with defined pathway but mechanistic link between ZNF281 and RIPK1 transcription not fully demonstrated","pmids":["39724734"],"is_preprint":false},{"year":2024,"finding":"ZNF281 forms a positive feedback loop with FOXO3 in corneal cells to sense elevated ROS and mitigate oxidative stress, potentially by regulating mitochondrial respiratory chain components and superoxide dismutase (SOD) expression. ZNF281 overexpression in MSCs prevents cellular senescence.","method":"Single-cell transcriptomics, overexpression experiments, immunofluorescence, functional senescence assays","journal":"Aging cell","confidence":"Low","confidence_rationale":"Tier 3 — single-cell transcriptomics plus overexpression without direct biochemical mechanistic validation of FOXO3 interaction","pmids":["39254179"],"is_preprint":false},{"year":2026,"finding":"Znf281 reduces phosphorylated Smad1/5/8 levels (downstream effectors of BMP signaling) to promote neural tissue formation in Xenopus embryos. Znf281 overexpression induces neural tissue with anterior-posterior patterning and inhibits epidermal differentiation; knockdown reduces expression of neural markers.","method":"Xenopus gain/loss-of-function (overexpression, morpholino knockdown), ectodermal explant assays, Western blot for pSmad1/5/8, in situ hybridization for neural markers","journal":"Development, growth & differentiation","confidence":"Medium","confidence_rationale":"Tier 2 — gain and loss of function in Xenopus with defined molecular readout (pSmad1/5/8), but mechanism of BMP pathway inhibition not fully elucidated","pmids":["41536077"],"is_preprint":false},{"year":2026,"finding":"Multiple classes of anticancer agents (intercalating/alkylating agents, tyrosine kinase inhibitors, receptor inhibitors) converge to increase selective translational upregulation of ZNF281 in cardiomyocytes as part of the integrated stress response. Cardiomyocyte-specific ZNF281-deficient mice are completely resistant to anthracycline-induced cardiotoxicity, whereas cardiomyocyte-specific ZNF281-overexpressing mice develop cardiotoxicity features.","method":"Cardiomyocyte-specific conditional knockout and overexpression mouse models, pharmacological small-molecule inhibitor (ZIM), in vivo tumor/metastasis model, patient myocardial tissue analysis","journal":"Science translational medicine","confidence":"High","confidence_rationale":"Tier 1-2 — cardiomyocyte-specific genetic gain and loss of function in vivo with clear phenotype, translational validation in human tissue","pmids":["41984928"],"is_preprint":false}],"current_model":"ZNF281 is a Krüppel-type zinc-finger transcription factor that directly binds GC-rich promoter elements to activate or repress target genes (including SNAIL, XRCC2, XRCC4, TFAM, HK2, and ANXA10), recruits co-repressor complexes such as NuRD (via HDAC1/MTA1) to silence tumor suppressors, physically interacts with β-catenin, GATA1, NRF1, PGC-1α, and XRCC4, is rapidly recruited to DNA double-strand breaks via its DNA-binding domain and PARP activity to facilitate NHEJ repair, undergoes GSK-3β-mediated phosphorylation at S638 leading to β-TrCP2-dependent ubiquitination and degradation, is subject to cytoplasmic sequestration by SUFU masking its NLS, and is post-transcriptionally regulated by multiple miRNAs (miR-34a, miR-1, miR-543); collectively these activities position ZNF281 as a central EMT-inducing transcription factor, a DNA damage repair facilitator, a regulator of mitochondrial biogenesis and metabolic homeostasis, and—under chemotherapeutic stress—a selectively translated mediator of cardiomyocyte injury."},"narrative":{"teleology":[{"year":2012,"claim":"Establishing ZNF281 as a transcriptional regulator of β-catenin that controls the balance between stem cell proliferation and differentiation resolved the question of whether ZNF281 functions beyond sequence-specific DNA binding.","evidence":"ChIP on β-CATENIN promoter, gain/loss-of-function in human multipotent stem cells with in vivo subcutaneous implantation","pmids":["22963690"],"confidence":"Medium","gaps":["Direct binding motif on the β-catenin promoter not mapped at nucleotide resolution","Whether ZNF281 activates or represses β-catenin transcription context-dependently was unclear"]},{"year":2013,"claim":"Identification of a SNAIL–ZNF281–miR-34a coherent feed-forward loop established ZNF281 as a central EMT-inducing transcription factor in colorectal cancer, resolving how p53 loss amplifies EMT programs.","evidence":"ChIP, luciferase reporters, miRNA target validation, gain/loss-of-function in CRC cells, mouse metastasis model","pmids":["24185900"],"confidence":"High","gaps":["Whether ZNF281 alone is sufficient for EMT without SNAIL co-expression","Genome-wide direct target repertoire of ZNF281 was not defined"]},{"year":2015,"claim":"Demonstration that ZNF281 directly transactivates DNA repair genes XRCC2 and XRCC4 established a new non-EMT function: transcriptional facilitation of DNA damage repair.","evidence":"ChIP on XRCC2/XRCC4 promoters, luciferase reporters, siRNA knockdown with comet assay under etoposide","pmids":["26300006"],"confidence":"High","gaps":["Whether ZNF281 regulates other DDR pathway genes beyond XRCC2/4","No structural basis for promoter selectivity"]},{"year":2017,"claim":"Discovery that GSK-3β phosphorylates ZNF281 at S638 to trigger β-TrCP2-mediated ubiquitination and degradation revealed the primary post-translational control mechanism for ZNF281 protein levels.","evidence":"In vitro kinase assay, S638A mutagenesis, co-IP with β-TrCP2, ubiquitination assay in CRC cells","pmids":["29179460"],"confidence":"High","gaps":["Whether other kinases or phospho-sites regulate ZNF281 stability in different tissues","Physiological signals upstream of GSK-3β that modulate ZNF281 turnover"]},{"year":2017,"claim":"Showing that ZNF281 physically binds β-catenin and reduces its polyubiquitination connected ZNF281 to Wnt pathway activation at the protein level, beyond transcriptional regulation of β-catenin.","evidence":"Co-IP, Topflash luciferase assay, ectopic expression/knockdown in pancreatic cancer cells","pmids":["28523575"],"confidence":"Medium","gaps":["Precise domain on ZNF281 mediating β-catenin interaction not mapped","Mechanism by which ZNF281 blocks β-catenin ubiquitination unresolved"]},{"year":2019,"claim":"Live-cell imaging showing ZNF281 recruitment to double-strand breaks within seconds, dependent on PARP and its zinc-finger domain, and its physical interaction with XRCC4 to promote NHEJ, established ZNF281 as a direct participant—not just a transcriptional regulator—in DNA repair.","evidence":"Laser micro-irradiation, FRAP, co-IP with XRCC4, NHEJ reporter assay, PARP inhibitor treatment","pmids":["31570788"],"confidence":"High","gaps":["Whether ZNF281 also participates in homologous recombination at damage sites","Structural basis for PARP-dependent recruitment unknown"]},{"year":2019,"claim":"Identification of Zfp281 as a GATA1 co-factor at erythroid gene promoters extended ZNF281 function to hematopoietic lineage specification, showing it is required for normal erythroid maturation.","evidence":"Reciprocal co-IP, ChIP-seq, conditional knockout mouse model with erythroid maturation block","pmids":["31455666"],"confidence":"High","gaps":["Whether ZNF281 cooperates with GATA1 as an activator or repressor at specific loci","Redundancy with Zfp148 not fully delineated"]},{"year":2022,"claim":"Demonstrating that SUFU sequesters ZNF281 in the cytoplasm by masking its NLS revealed a Hedgehog-independent mechanism that spatially limits ZNF281 transcriptional activity, controlling both migration and DDR gene activation.","evidence":"Co-IP, subcellular fractionation, NLS mutagenesis, migration assays, in vivo tumor model","pmids":["36220888"],"confidence":"High","gaps":["Signals that release ZNF281 from SUFU sequestration not identified","Whether SUFU–ZNF281 interaction is regulated during DNA damage"]},{"year":2022,"claim":"Identification of a specific GC-rich binding motif (5'-GGCGGCGGGCGG-3') on the HK2 promoter through which ZNF281 represses HK2 transcription linked ZNF281 to metabolic regulation and mitophagy control.","evidence":"ChIP with defined motif, promoter reporter, siRNA knockdown, AAV-shRNA in vivo, mitophagy/senescence readouts","pmids":["36514923"],"confidence":"High","gaps":["Genome-wide prevalence and functionality of this motif at other ZNF281 targets unknown","Whether ZNF281 repression of HK2 operates in non-hepatic tissues"]},{"year":2023,"claim":"Discovery that ZNF281 physically interacts with NRF1 and PGC-1α and represses TFAM/TFB1M/TFB2M established ZNF281 as a negative regulator of mitochondrial biogenesis, linking its EMT-promoting role to metabolic reprogramming in hepatocellular carcinoma.","evidence":"Co-IP, ChIP on TFAM/TFB1M/TFB2M promoters, RNA-seq, OCR measurement, metabolomics, knockdown/rescue","pmids":["37880213"],"confidence":"High","gaps":["Whether ZNF281 globally rewires oxidative phosphorylation or selectively targets mitochondrial transcription","Applicability beyond HCC not tested"]},{"year":2023,"claim":"Showing that ZNF281 recruits the NuRD complex (HDAC1/MTA1) to the ANXA10 promoter to silence this tumor suppressor revealed the co-repressor mechanism by which ZNF281 drives HCC invasion.","evidence":"ChIP, co-IP identifying HDAC1 and MTA1, RNA-seq, siRNA rescue of ANXA10, pulmonary metastasis model","pmids":["37041757"],"confidence":"High","gaps":["Whether NuRD recruitment is a general mechanism at all ZNF281-repressed loci or specific to ANXA10","Structural basis of ZNF281–NuRD interaction unknown"]},{"year":2024,"claim":"Linking ZNF281 to RIPK1/RIPK3/MLKL necroptotic signaling in hepatocytes under lipotoxic stress, and demonstrating prevention of NASH by hepatocyte-specific Zfp281 deletion, expanded ZNF281 function to inflammatory cell death in metabolic liver disease.","evidence":"Hepatocyte-specific Zfp281 KO mice, Western blot, metabolic phenotyping, histology","pmids":["39724734"],"confidence":"Medium","gaps":["Direct transcriptional mechanism linking ZNF281 to RIPK1 upregulation not established","Whether ZNF281 drives necroptosis in tissues beyond liver"]},{"year":2026,"claim":"Demonstrating that chemotherapeutic agents selectively upregulate ZNF281 translation in cardiomyocytes via the integrated stress response, and that cardiomyocyte-specific ZNF281 deficiency confers complete resistance to anthracycline cardiotoxicity, identified ZNF281 as a druggable mediator of chemotherapy-induced heart injury.","evidence":"Cardiomyocyte-specific conditional KO and overexpression mice, ZNF281 small-molecule inhibitor (ZIM), patient myocardial tissue analysis","pmids":["41984928"],"confidence":"High","gaps":["Downstream transcriptional targets of ZNF281 in cardiomyocytes that execute cell death not identified","Whether ZIM has off-target effects in tumors"]},{"year":2026,"claim":"Showing that Znf281 reduces phosphorylated Smad1/5/8 to promote neural induction in Xenopus extended ZNF281 function to BMP pathway antagonism during vertebrate neural development.","evidence":"Xenopus overexpression and morpholino knockdown, ectodermal explant assays, Western blot for pSmad1/5/8","pmids":["41536077"],"confidence":"Medium","gaps":["Mechanism by which ZNF281 reduces pSmad1/5/8 (direct or indirect) not elucidated","Relevance to mammalian neural development not tested"]},{"year":null,"claim":"The genome-wide direct target repertoire, the structural basis for GC-rich DNA recognition and co-repressor recruitment, and the tissue-specific rules governing whether ZNF281 activates or represses transcription remain unresolved.","evidence":"","pmids":[],"confidence":"High","gaps":["No crystal or cryo-EM structure of ZNF281 zinc-finger domain bound to DNA","No genome-wide CUT&RUN or equivalent in matched activation/repression contexts","Integrated model of how post-translational modifications (phosphorylation, ubiquitination, SUFU sequestration) coordinately tune ZNF281 activity is lacking"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[0,3,6,13,14,15]},{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[0,1,3,10,11,13,14,15]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[0,3,6,12,14,15]},{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[12]}],"pathway":[{"term_id":"R-HSA-73894","term_label":"DNA Repair","supporting_discovery_ids":[3,6]},{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[0,1,10,13,14,15]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[5,8,11]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[7,18]},{"term_id":"R-HSA-1852241","term_label":"Organelle biogenesis and maintenance","supporting_discovery_ids":[14]},{"term_id":"R-HSA-5357801","term_label":"Programmed Cell Death","supporting_discovery_ids":[16,19]},{"term_id":"R-HSA-4839726","term_label":"Chromatin organization","supporting_discovery_ids":[15]}],"complexes":["NuRD"],"partners":["SNAI1","XRCC4","HDAC1","MTA1","CTNNB1","GATA1","NRF1","SUFU"],"other_free_text":[]},"mechanistic_narrative":"ZNF281 is a Krüppel-type zinc-finger transcription factor that operates as a multifunctional transcriptional regulator governing epithelial-mesenchymal transition, DNA damage repair, mitochondrial biogenesis, and cellular differentiation. It directly binds GC-rich promoter elements to activate SNAIL and ZEB1 (driving EMT) or repress tumor suppressors such as ANXA10 by recruiting the NuRD co-repressor complex (HDAC1/MTA1), and it represses mitochondrial biogenesis factors TFAM, NRF1, and PGC-1α through direct promoter binding and physical interaction with NRF1 and PGC-1α [PMID:24185900, PMID:37041757, PMID:37880213]. ZNF281 is rapidly recruited to DNA double-strand breaks in a PARP-dependent manner, where it physically interacts with XRCC4 via its zinc-finger domain to promote NHEJ, and it transcriptionally activates both XRCC2 and XRCC4 [PMID:31570788, PMID:26300006]. Its protein stability is controlled by GSK-3β-mediated phosphorylation at S638, which triggers β-TrCP2-dependent ubiquitination and degradation, while SUFU sequesters ZNF281 in the cytoplasm by masking its nuclear localization signal; under chemotherapeutic stress, selective translational upregulation of ZNF281 in cardiomyocytes mediates drug-induced cardiotoxicity, as demonstrated by complete resistance to anthracycline injury in cardiomyocyte-specific ZNF281-deficient mice [PMID:29179460, PMID:36220888, PMID:41984928]."},"prefetch_data":{"uniprot":{"accession":"Q9Y2X9","full_name":"Zinc finger protein 281","aliases":["GC-box-binding zinc finger protein 1","Transcription factor ZBP-99","Zinc finger DNA-binding protein 99"],"length_aa":895,"mass_kda":96.9,"function":"Transcription repressor that plays a role in regulation of embryonic stem cells (ESCs) differentiation. Required for ESCs differentiation and acts by mediating autorepression of NANOG in ESCs: binds to the NANOG promoter and promotes association of NANOG protein to its own promoter and recruits the NuRD complex, which deacetylates histones. Not required for establishement and maintenance of ESCs (By similarity). Represses the transcription of a number of genes including GAST, ODC1 and VIM. Binds to the G-rich box in the enhancer region of these genes","subcellular_location":"Nucleus","url":"https://www.uniprot.org/uniprotkb/Q9Y2X9/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/ZNF281","classification":"Not Classified","n_dependent_lines":52,"n_total_lines":1208,"dependency_fraction":0.04304635761589404},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[{"gene":"CAPZB","stoichiometry":4.0}],"url":"https://opencell.sf.czbiohub.org/search/ZNF281","total_profiled":1310},"omim":[{"mim_id":"618703","title":"ZINC FINGER PROTEIN 281; ZNF281","url":"https://www.omim.org/entry/618703"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Enhanced","locations":[{"location":"Nucleoplasm","reliability":"Enhanced"}],"tissue_specificity":"Tissue enhanced","tissue_distribution":"Detected in all","driving_tissues":[{"tissue":"bone marrow","ntpm":31.7}],"url":"https://www.proteinatlas.org/search/ZNF281"},"hgnc":{"alias_symbol":["ZBP-99"],"prev_symbol":[]},"alphafold":{"accession":"Q9Y2X9","domains":[{"cath_id":"3.30.160.60","chopping":"258-315","consensus_level":"medium","plddt":87.7722,"start":258,"end":315},{"cath_id":"3.30.160.60","chopping":"316-370","consensus_level":"medium","plddt":83.5155,"start":316,"end":370}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9Y2X9","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q9Y2X9-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q9Y2X9-F1-predicted_aligned_error_v6.png","plddt_mean":46.53},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=ZNF281","jax_strain_url":"https://www.jax.org/strain/search?query=ZNF281"},"sequence":{"accession":"Q9Y2X9","fasta_url":"https://rest.uniprot.org/uniprotkb/Q9Y2X9.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q9Y2X9/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9Y2X9"}},"corpus_meta":[{"pmid":"24185900","id":"PMC_24185900","title":"SNAIL and miR-34a feed-forward regulation of ZNF281/ZBP99 promotes epithelial-mesenchymal transition.","date":"2013","source":"The EMBO journal","url":"https://pubmed.ncbi.nlm.nih.gov/24185900","citation_count":152,"is_preprint":false},{"pmid":"31243884","id":"PMC_31243884","title":"CircAGFG1 sponges miR-203 to promote EMT and metastasis of non-small-cell lung cancer by upregulating ZNF281 expression.","date":"2019","source":"Thoracic cancer","url":"https://pubmed.ncbi.nlm.nih.gov/31243884","citation_count":49,"is_preprint":false},{"pmid":"32801774","id":"PMC_32801774","title":"lncRNA UCA1 Contributes to 5-Fluorouracil Resistance of Colorectal Cancer Cells Through miR-23b-3p/ZNF281 Axis.","date":"2020","source":"OncoTargets and therapy","url":"https://pubmed.ncbi.nlm.nih.gov/32801774","citation_count":44,"is_preprint":false},{"pmid":"24838609","id":"PMC_24838609","title":"ZNF281/ZBP-99: a new player in epithelial-mesenchymal transition, stemness, and cancer.","date":"2014","source":"Journal of molecular medicine (Berlin, Germany)","url":"https://pubmed.ncbi.nlm.nih.gov/24838609","citation_count":42,"is_preprint":false},{"pmid":"26300006","id":"PMC_26300006","title":"ZNF281 contributes to the DNA damage response by controlling the expression of XRCC2 and XRCC4.","date":"2015","source":"Oncogene","url":"https://pubmed.ncbi.nlm.nih.gov/26300006","citation_count":38,"is_preprint":false},{"pmid":"31112017","id":"PMC_31112017","title":"ZNF281 Regulates Cell Proliferation, Migration and Invasion in Colorectal Cancer through Wnt/β-Catenin Signaling.","date":"2019","source":"Cellular physiology and biochemistry : international journal of experimental cellular physiology, biochemistry, and pharmacology","url":"https://pubmed.ncbi.nlm.nih.gov/31112017","citation_count":31,"is_preprint":false},{"pmid":"36514923","id":"PMC_36514923","title":"ZNF281 drives hepatocyte senescence in alcoholic liver disease by reducing HK2-stabilized PINK1/Parkin-mediated mitophagy.","date":"2022","source":"Cell proliferation","url":"https://pubmed.ncbi.nlm.nih.gov/36514923","citation_count":28,"is_preprint":false},{"pmid":"31570788","id":"PMC_31570788","title":"ZNF281 is recruited on DNA breaks to facilitate DNA repair by non-homologous end joining.","date":"2019","source":"Oncogene","url":"https://pubmed.ncbi.nlm.nih.gov/31570788","citation_count":27,"is_preprint":false},{"pmid":"30619271","id":"PMC_30619271","title":"Transcription Factor ZNF281: A Novel Player in Intestinal Inflammation and Fibrosis.","date":"2018","source":"Frontiers in immunology","url":"https://pubmed.ncbi.nlm.nih.gov/30619271","citation_count":26,"is_preprint":false},{"pmid":"38286833","id":"PMC_38286833","title":"tRF3-IleAAT reduced extracellular matrix synthesis in diabetic kidney disease mice by targeting ZNF281 and inhibiting ferroptosis.","date":"2024","source":"Acta pharmacologica Sinica","url":"https://pubmed.ncbi.nlm.nih.gov/38286833","citation_count":25,"is_preprint":false},{"pmid":"28523575","id":"PMC_28523575","title":"ZNF281 Promotes Growth and Invasion of Pancreatic Cancer Cells by Activating Wnt/β-Catenin Signaling.","date":"2017","source":"Digestive diseases and sciences","url":"https://pubmed.ncbi.nlm.nih.gov/28523575","citation_count":23,"is_preprint":false},{"pmid":"22963690","id":"PMC_22963690","title":"ZNF281 knockdown induced osteogenic differentiation of human multipotent stem cells in vivo and in vitro.","date":"2012","source":"Cell transplantation","url":"https://pubmed.ncbi.nlm.nih.gov/22963690","citation_count":23,"is_preprint":false},{"pmid":"30509101","id":"PMC_30509101","title":"Novel lncRNA-ZNF281 regulates cell growth, stemness and invasion of glioma stem-like U251s cells.","date":"2018","source":"Neoplasma","url":"https://pubmed.ncbi.nlm.nih.gov/30509101","citation_count":22,"is_preprint":false},{"pmid":"37880213","id":"PMC_37880213","title":"ZNF281 inhibits mitochondrial biogenesis to facilitate metastasis of hepatocellular carcinoma.","date":"2023","source":"Cell death discovery","url":"https://pubmed.ncbi.nlm.nih.gov/37880213","citation_count":21,"is_preprint":false},{"pmid":"32512343","id":"PMC_32512343","title":"ZNF281-miR-543 Feedback Loop Regulates Transforming Growth Factor-β-Induced Breast Cancer Metastasis.","date":"2020","source":"Molecular therapy. Nucleic acids","url":"https://pubmed.ncbi.nlm.nih.gov/32512343","citation_count":20,"is_preprint":false},{"pmid":"34071380","id":"PMC_34071380","title":"ZNF-281 as the Potential Diagnostic Marker of Oral Squamous Cell Carcinoma.","date":"2021","source":"Cancers","url":"https://pubmed.ncbi.nlm.nih.gov/34071380","citation_count":18,"is_preprint":false},{"pmid":"36142169","id":"PMC_36142169","title":"ZNF281 Promotes Colon Fibroblast Activation in TGFβ1-Induced Gut Fibrosis.","date":"2022","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/36142169","citation_count":17,"is_preprint":false},{"pmid":"36220888","id":"PMC_36220888","title":"Inhibition of the transcription factor ZNF281 by SUFU to suppress tumor cell migration.","date":"2022","source":"Cell death and differentiation","url":"https://pubmed.ncbi.nlm.nih.gov/36220888","citation_count":15,"is_preprint":false},{"pmid":"29179460","id":"PMC_29179460","title":"GSK-3β phosphorylation-dependent degradation of ZNF281 by β-TrCP2 suppresses colorectal cancer progression.","date":"2017","source":"Oncotarget","url":"https://pubmed.ncbi.nlm.nih.gov/29179460","citation_count":15,"is_preprint":false},{"pmid":"30885238","id":"PMC_30885238","title":"Expression of zinc finger transcription factors (ZNF143 and ZNF281) in serous borderline ovarian tumors and low-grade ovarian cancers.","date":"2019","source":"Journal of ovarian research","url":"https://pubmed.ncbi.nlm.nih.gov/30885238","citation_count":13,"is_preprint":false},{"pmid":"31782884","id":"PMC_31782884","title":"ZNF281/Zfp281 is a target of miR-1 and counteracts muscle differentiation.","date":"2019","source":"Molecular oncology","url":"https://pubmed.ncbi.nlm.nih.gov/31782884","citation_count":12,"is_preprint":false},{"pmid":"33320427","id":"PMC_33320427","title":"Circular RNA hsa_circ_0008003 facilitates tumorigenesis and development of non-small cell lung carcinoma via modulating miR-488/ZNF281 axis.","date":"2020","source":"Journal of cellular and molecular medicine","url":"https://pubmed.ncbi.nlm.nih.gov/33320427","citation_count":11,"is_preprint":false},{"pmid":"32782613","id":"PMC_32782613","title":"Long non-coding RNA-ZNF281 upregulates PTEN expression via downregulation of microRNA-221 in non-small cell lung cancer.","date":"2020","source":"Oncology letters","url":"https://pubmed.ncbi.nlm.nih.gov/32782613","citation_count":10,"is_preprint":false},{"pmid":"31455666","id":"PMC_31455666","title":"Zfp281 (ZBP-99) plays a functionally redundant role with Zfp148 (ZBP-89) during erythroid development.","date":"2019","source":"Blood advances","url":"https://pubmed.ncbi.nlm.nih.gov/31455666","citation_count":9,"is_preprint":false},{"pmid":"32073896","id":"PMC_32073896","title":"LncRNA-ZNF281 Interacts with miR-539 to Promote Hepatocellular Carcinoma Cell Invasion and Migration.","date":"2020","source":"Cancer biotherapy & radiopharmaceuticals","url":"https://pubmed.ncbi.nlm.nih.gov/32073896","citation_count":8,"is_preprint":false},{"pmid":"37041757","id":"PMC_37041757","title":"Inhibition of Annexin A10 Contributes to ZNF281 Mediated Aggressiveness of Hepatocellular Carcinoma.","date":"2023","source":"Journal of hepatocellular carcinoma","url":"https://pubmed.ncbi.nlm.nih.gov/37041757","citation_count":8,"is_preprint":false},{"pmid":"36685971","id":"PMC_36685971","title":"Multi-functional gene ZNF281 identified as a molecular biomarker in soft tissue regeneration and pan-cancer progression.","date":"2023","source":"Frontiers in genetics","url":"https://pubmed.ncbi.nlm.nih.gov/36685971","citation_count":7,"is_preprint":false},{"pmid":"38880820","id":"PMC_38880820","title":"Identification and validation of the role of ZNF281 in 5-fluorouracil chemotherapy of gastric cancer.","date":"2024","source":"Journal of cancer research and clinical 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medicine","url":"https://pubmed.ncbi.nlm.nih.gov/37939252","citation_count":4,"is_preprint":false},{"pmid":"39254179","id":"PMC_39254179","title":"Comparative single-cell transcriptomic analysis across tissues of aging primates reveals specific autologous activation of ZNF281 to mitigate oxidative stress in cornea.","date":"2024","source":"Aging cell","url":"https://pubmed.ncbi.nlm.nih.gov/39254179","citation_count":3,"is_preprint":false},{"pmid":"34056009","id":"PMC_34056009","title":"Upregulation of lnc-ZNF281 Inhibits the Progression of Glioma via the AKT/GSK-3β/β-Catenin Signaling Pathway.","date":"2021","source":"Journal of immunology research","url":"https://pubmed.ncbi.nlm.nih.gov/34056009","citation_count":2,"is_preprint":false},{"pmid":"39724734","id":"PMC_39724734","title":"Inhibition of ZFP281/ZNF281-RIPK1/RIPK3/MLKL signaling in hepatocytes by pterostilbene relieves hepatic lipometabolic disorder and inflammation in non-alcoholic steatohepatitis.","date":"2024","source":"International immunopharmacology","url":"https://pubmed.ncbi.nlm.nih.gov/39724734","citation_count":2,"is_preprint":false},{"pmid":"39518154","id":"PMC_39518154","title":"ZNF281 Facilitates the Invasion of Cervical Cancer Cell Both In Vivo and In Vitro †.","date":"2024","source":"Cancers","url":"https://pubmed.ncbi.nlm.nih.gov/39518154","citation_count":1,"is_preprint":false},{"pmid":"40072551","id":"PMC_40072551","title":"Long noncoding RNA MATN1-AS1 contributes to oxaliplatin resistance of gastric cancer cells through miR-518b/ZNF281 axis.","date":"2025","source":"Naunyn-Schmiedeberg's archives of pharmacology","url":"https://pubmed.ncbi.nlm.nih.gov/40072551","citation_count":0,"is_preprint":false},{"pmid":"41536077","id":"PMC_41536077","title":"The Zinc Finger Protein Znf281 Is Essential for the Formation of Neural Tissue in Xenopus Embryos.","date":"2026","source":"Development, growth & differentiation","url":"https://pubmed.ncbi.nlm.nih.gov/41536077","citation_count":0,"is_preprint":false},{"pmid":"41984928","id":"PMC_41984928","title":"Selective translation of ZNF281 as part of the integrated stress response system has therapeutic relevance for cardio-oncology.","date":"2026","source":"Science translational medicine","url":"https://pubmed.ncbi.nlm.nih.gov/41984928","citation_count":0,"is_preprint":false},{"pmid":"41216437","id":"PMC_41216437","title":"Gene and metabolite changes triggered by downregulation of JUNB and ZNF281 in idiopathic pulmonary arterial hypertension: potential mechanisms revealed by multi-omics study.","date":"2025","source":"Translational pediatrics","url":"https://pubmed.ncbi.nlm.nih.gov/41216437","citation_count":0,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":21213,"output_tokens":4758,"usd":0.067504},"stage2":{"model":"claude-opus-4-6","input_tokens":8333,"output_tokens":3810,"usd":0.205373},"total_usd":0.272877,"stage1_batch_id":"msgbatch_01BparvgRZ9S2LMidvaoo86K","stage2_batch_id":"msgbatch_01NkBfv9SVZWthhS7j6mU6G3","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2013,\n      \"finding\": \"ZNF281 expression is directly induced by SNAIL at the transcriptional level and repressed by miR-34a/b/c (which is itself repressed by SNAIL), forming a coherent feed-forward loop. ZNF281 in turn directly activates SNAIL transcription, creating a regulatory circuit controlling EMT. p53 activation represses ZNF281 via miR-34a.\",\n      \"method\": \"Luciferase reporter assays, ChIP, miRNA target validation, gain/loss-of-function in CRC cells, mouse metastasis model\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — multiple orthogonal methods (ChIP, reporter assays, gain/loss-of-function, in vivo metastasis), replicated across contexts\",\n      \"pmids\": [\"24185900\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"ZNF281 directly activates SNAIL transcription and induces EMT markers, increases β-catenin activity, and promotes stemness marker expression (LGR5, CD133) in colorectal cancer cells. c-MYC induces ZNF281 protein expression in a SNAIL-dependent manner.\",\n      \"method\": \"Ectopic expression, knockdown, luciferase assays, ChIP, sphere formation, mouse lung metastasis model\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — multiple orthogonal methods and in vivo validation in a single rigorous study\",\n      \"pmids\": [\"24185900\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"ZNF281 physically interacts with the pluripotency transcription factors NANOG, OCT4, SOX2, and c-MYC.\",\n      \"method\": \"Co-immunoprecipitation (reported in review citing experimental data)\",\n      \"journal\": \"Journal of molecular medicine (Berlin, Germany)\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — interaction reported in a review paper citing prior experimental work; no independent replication described here\",\n      \"pmids\": [\"24838609\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"ZNF281 transcriptionally activates XRCC2 (homologous recombination) and XRCC4 (NHEJ) through direct DNA binding at their promoters, contributing to the cellular DNA damage response. This is dependent on its DNA-binding domain.\",\n      \"method\": \"Luciferase reporter assays, ChIP (chromatin immunoprecipitation), siRNA knockdown with comet assay for DNA repair, genotoxic stress (etoposide) treatment\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — ChIP + reporter assays + functional comet assay with multiple orthogonal methods\",\n      \"pmids\": [\"26300006\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"GSK-3β (but not GSK-3α) phosphorylates ZNF281 at a consensus TSGEHS motif (S638), which promotes ZNF281 interaction with the E3 ligase β-TrCP2, leading to ubiquitination and proteasomal degradation of ZNF281. A ZNF281-S638A mutant is resistant to this degradation. ZNF281 also transcriptionally represses β-TrCP2, forming a negative feedback loop.\",\n      \"method\": \"In vitro kinase assay, co-immunoprecipitation, ubiquitination assay, site-directed mutagenesis (S638A), Western blot, CRC cell lines\",\n      \"journal\": \"Oncotarget\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — direct biochemical identification of phosphorylation site with mutagenesis validation and functional consequence\",\n      \"pmids\": [\"29179460\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"ZNF281 promotes pancreatic cancer cell proliferation and invasion by directly binding β-catenin and decreasing its polyubiquitination, thereby activating Wnt/β-catenin signaling and downstream gene expression.\",\n      \"method\": \"Immunoprecipitation, Western blot, Topflash luciferase assay, ectopic expression/knockdown\",\n      \"journal\": \"Digestive diseases and sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — Co-IP and reporter assay in single study, moderate mechanistic depth\",\n      \"pmids\": [\"28523575\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"ZNF281 is rapidly recruited to DNA double-strand break sites (within seconds of damage) via a mechanism dependent on its DNA-binding domain and, at least in part, on PARP activity. ZNF281 binds XRCC4 through its zinc-finger domain and facilitates XRCC4 recruitment to damage sites, promoting efficient NHEJ repair.\",\n      \"method\": \"Live-cell imaging, FRAP, laser micro-irradiation, co-immunoprecipitation, siRNA knockdown, NHEJ repair assay, PARP inhibitor treatment\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — multiple orthogonal methods including live-cell kinetics, direct protein interaction, and functional NHEJ assay\",\n      \"pmids\": [\"31570788\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Zfp281 (mouse ortholog of ZNF281) physically associates with the master erythroid transcription factor GATA1, co-occupies chromatin sites with GATA1 and Zfp148, and regulates a common set of genes required for erythroid cell differentiation. Combined deficiency of Zfp148 and Zfp281 causes a marked erythroid maturation block.\",\n      \"method\": \"Co-immunoprecipitation, ChIP-seq, conditional knockout mouse model, knockdown studies\",\n      \"journal\": \"Blood advances\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — reciprocal Co-IP, ChIP-seq, and in vivo genetic model with clear phenotype\",\n      \"pmids\": [\"31455666\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"ZNF281 knockdown in colorectal cancer cells suppresses cell proliferation, migration, and invasion by inhibiting the Wnt/β-catenin pathway.\",\n      \"method\": \"siRNA knockdown, Transwell/wound healing assay, Western blot for Wnt/β-catenin pathway components\",\n      \"journal\": \"Cellular physiology and biochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — loss-of-function with pathway readout, single lab without mechanistic depth beyond pathway association\",\n      \"pmids\": [\"31112017\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"ZNF281/Zfp281 inhibits skeletal muscle differentiation induced by miR-1 and is a direct target of miR-1. Multiple miR binding sites in the 3'UTR of ZNF281/Zfp281 are functional for post-transcriptional regulation during differentiation.\",\n      \"method\": \"3'UTR reporter assays, miR-1 gain/loss-of-function, differentiation assays in muscle cell lines\",\n      \"journal\": \"Molecular oncology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — 3'UTR reporter and functional differentiation assays in single study\",\n      \"pmids\": [\"31782884\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"ZNF281 transactivates the EMT-related transcription factors ZEB1 and SNAIL to promote TGF-β-induced breast cancer metastasis. ZEB1 and SNAIL in turn transcriptionally suppress miR-543, which targets ZNF281, forming a ZNF281–miR-543 feedback loop.\",\n      \"method\": \"Luciferase reporter assays, ChIP, gain/loss-of-function, in vitro and in vivo metastasis assays\",\n      \"journal\": \"Molecular therapy. Nucleic acids\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — ChIP and reporter assays with in vivo validation, single lab\",\n      \"pmids\": [\"32512343\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"ZNF281 binds to the promoter region of β-CATENIN and transcriptionally regulates it. Knockdown of ZNF281 in human multipotent stem cells results in spontaneous osteochondrogenic differentiation, while overexpression promotes proliferation.\",\n      \"method\": \"ChIP assay, gain/loss-of-function, in vivo subcutaneous implantation with β-TCP, molecular markers for differentiation\",\n      \"journal\": \"Cell transplantation\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — ChIP plus in vivo functional validation, single lab\",\n      \"pmids\": [\"22963690\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"SUFU binds ZNF281 and masks its nuclear localization signal, causing cytoplasmic retention of ZNF281 and thereby inhibiting ZNF281-mediated tumor cell migration and DNA damage repair gene activation. This is a Hedgehog-independent function of SUFU.\",\n      \"method\": \"Co-immunoprecipitation, subcellular fractionation/localization studies, NLS mutagenesis, migration assays, in vivo tumor model\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — direct protein interaction plus mechanistic NLS masking demonstrated with mutagenesis and in vivo validation\",\n      \"pmids\": [\"36220888\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"ZNF281 directly binds to the 5'-GGCGGCGGGCGG-3' motif within the HK2 promoter to transcriptionally repress HK2 expression, thereby reducing HK2-stabilized PINK1/Parkin-mediated mitophagy and driving ethanol-induced hepatocyte senescence.\",\n      \"method\": \"ChIP assay, promoter reporter assay, siRNA knockdown, adeno-associated virus (AAV) shRNA in vivo, mitophagy/senescence readouts\",\n      \"journal\": \"Cell proliferation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — ChIP with defined binding motif, in vivo AAV knockdown, multiple functional readouts\",\n      \"pmids\": [\"36514923\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"ZNF281 suppresses transcription of the mitochondrial biogenesis factors TFAM, NRF1, and PGC-1α. ZNF281 also physically interacts with NRF1 and PGC-1α and is recruited to the promoters of TFAM, TFB1M, and TFB2M to repress their expression, thereby inhibiting mitochondrial biogenesis and facilitating HCC metastasis.\",\n      \"method\": \"Co-immunoprecipitation, ChIP assay, RNA-seq, knockdown/rescue experiments, OCR measurement, metabolomics\",\n      \"journal\": \"Cell death discovery\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — ChIP + Co-IP + functional metabolic readouts + rescue experiments in single rigorous study\",\n      \"pmids\": [\"37880213\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"ZNF281 recruits components of the NuRD complex (including HDAC1 and MTA1) to the ANXA10 promoter via direct binding to ZNF281 recognition sites, transcriptionally repressing the tumor suppressor ANXA10 and thereby promoting HCC invasion and metastasis. Knockdown of HDAC1 or MTA1 releases ANXA10 from repression and reverses ZNF281-driven EMT.\",\n      \"method\": \"ChIP assay, co-immunoprecipitation, RNA-seq, siRNA knockdown, transwell/migration assays, pulmonary metastasis model\",\n      \"journal\": \"Journal of hepatocellular carcinoma\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — ChIP + Co-IP identifying specific complex components + in vivo metastasis model with mechanistic rescue\",\n      \"pmids\": [\"37041757\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"ZNF281 upregulates RIPK1/RIPK3/MLKL necroptotic signaling in hepatocytes under lipotoxic stress. Activated MLKL translocates to mitochondrial membrane disrupting fatty acid β-oxidation and to the plasma membrane triggering lytic cell death, thereby promoting NASH progression. Hepatocyte-specific Zfp281 deficiency prevents NASH in mice.\",\n      \"method\": \"Hepatocyte-specific Zfp281 knockout mice, Western blot, immunofluorescence, metabolic phenotyping, histology, molecular biology\",\n      \"journal\": \"International immunopharmacology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — in vivo hepatocyte-specific KO with defined pathway but mechanistic link between ZNF281 and RIPK1 transcription not fully demonstrated\",\n      \"pmids\": [\"39724734\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"ZNF281 forms a positive feedback loop with FOXO3 in corneal cells to sense elevated ROS and mitigate oxidative stress, potentially by regulating mitochondrial respiratory chain components and superoxide dismutase (SOD) expression. ZNF281 overexpression in MSCs prevents cellular senescence.\",\n      \"method\": \"Single-cell transcriptomics, overexpression experiments, immunofluorescence, functional senescence assays\",\n      \"journal\": \"Aging cell\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 — single-cell transcriptomics plus overexpression without direct biochemical mechanistic validation of FOXO3 interaction\",\n      \"pmids\": [\"39254179\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"Znf281 reduces phosphorylated Smad1/5/8 levels (downstream effectors of BMP signaling) to promote neural tissue formation in Xenopus embryos. Znf281 overexpression induces neural tissue with anterior-posterior patterning and inhibits epidermal differentiation; knockdown reduces expression of neural markers.\",\n      \"method\": \"Xenopus gain/loss-of-function (overexpression, morpholino knockdown), ectodermal explant assays, Western blot for pSmad1/5/8, in situ hybridization for neural markers\",\n      \"journal\": \"Development, growth & differentiation\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — gain and loss of function in Xenopus with defined molecular readout (pSmad1/5/8), but mechanism of BMP pathway inhibition not fully elucidated\",\n      \"pmids\": [\"41536077\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"Multiple classes of anticancer agents (intercalating/alkylating agents, tyrosine kinase inhibitors, receptor inhibitors) converge to increase selective translational upregulation of ZNF281 in cardiomyocytes as part of the integrated stress response. Cardiomyocyte-specific ZNF281-deficient mice are completely resistant to anthracycline-induced cardiotoxicity, whereas cardiomyocyte-specific ZNF281-overexpressing mice develop cardiotoxicity features.\",\n      \"method\": \"Cardiomyocyte-specific conditional knockout and overexpression mouse models, pharmacological small-molecule inhibitor (ZIM), in vivo tumor/metastasis model, patient myocardial tissue analysis\",\n      \"journal\": \"Science translational medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — cardiomyocyte-specific genetic gain and loss of function in vivo with clear phenotype, translational validation in human tissue\",\n      \"pmids\": [\"41984928\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"ZNF281 is a Krüppel-type zinc-finger transcription factor that directly binds GC-rich promoter elements to activate or repress target genes (including SNAIL, XRCC2, XRCC4, TFAM, HK2, and ANXA10), recruits co-repressor complexes such as NuRD (via HDAC1/MTA1) to silence tumor suppressors, physically interacts with β-catenin, GATA1, NRF1, PGC-1α, and XRCC4, is rapidly recruited to DNA double-strand breaks via its DNA-binding domain and PARP activity to facilitate NHEJ repair, undergoes GSK-3β-mediated phosphorylation at S638 leading to β-TrCP2-dependent ubiquitination and degradation, is subject to cytoplasmic sequestration by SUFU masking its NLS, and is post-transcriptionally regulated by multiple miRNAs (miR-34a, miR-1, miR-543); collectively these activities position ZNF281 as a central EMT-inducing transcription factor, a DNA damage repair facilitator, a regulator of mitochondrial biogenesis and metabolic homeostasis, and—under chemotherapeutic stress—a selectively translated mediator of cardiomyocyte injury.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"ZNF281 is a Krüppel-type zinc-finger transcription factor that operates as a multifunctional transcriptional regulator governing epithelial-mesenchymal transition, DNA damage repair, mitochondrial biogenesis, and cellular differentiation. It directly binds GC-rich promoter elements to activate SNAIL and ZEB1 (driving EMT) or repress tumor suppressors such as ANXA10 by recruiting the NuRD co-repressor complex (HDAC1/MTA1), and it represses mitochondrial biogenesis factors TFAM, NRF1, and PGC-1α through direct promoter binding and physical interaction with NRF1 and PGC-1α [PMID:24185900, PMID:37041757, PMID:37880213]. ZNF281 is rapidly recruited to DNA double-strand breaks in a PARP-dependent manner, where it physically interacts with XRCC4 via its zinc-finger domain to promote NHEJ, and it transcriptionally activates both XRCC2 and XRCC4 [PMID:31570788, PMID:26300006]. Its protein stability is controlled by GSK-3β-mediated phosphorylation at S638, which triggers β-TrCP2-dependent ubiquitination and degradation, while SUFU sequesters ZNF281 in the cytoplasm by masking its nuclear localization signal; under chemotherapeutic stress, selective translational upregulation of ZNF281 in cardiomyocytes mediates drug-induced cardiotoxicity, as demonstrated by complete resistance to anthracycline injury in cardiomyocyte-specific ZNF281-deficient mice [PMID:29179460, PMID:36220888, PMID:41984928].\",\n  \"teleology\": [\n    {\n      \"year\": 2012,\n      \"claim\": \"Establishing ZNF281 as a transcriptional regulator of β-catenin that controls the balance between stem cell proliferation and differentiation resolved the question of whether ZNF281 functions beyond sequence-specific DNA binding.\",\n      \"evidence\": \"ChIP on β-CATENIN promoter, gain/loss-of-function in human multipotent stem cells with in vivo subcutaneous implantation\",\n      \"pmids\": [\"22963690\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct binding motif on the β-catenin promoter not mapped at nucleotide resolution\", \"Whether ZNF281 activates or represses β-catenin transcription context-dependently was unclear\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Identification of a SNAIL–ZNF281–miR-34a coherent feed-forward loop established ZNF281 as a central EMT-inducing transcription factor in colorectal cancer, resolving how p53 loss amplifies EMT programs.\",\n      \"evidence\": \"ChIP, luciferase reporters, miRNA target validation, gain/loss-of-function in CRC cells, mouse metastasis model\",\n      \"pmids\": [\"24185900\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether ZNF281 alone is sufficient for EMT without SNAIL co-expression\", \"Genome-wide direct target repertoire of ZNF281 was not defined\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Demonstration that ZNF281 directly transactivates DNA repair genes XRCC2 and XRCC4 established a new non-EMT function: transcriptional facilitation of DNA damage repair.\",\n      \"evidence\": \"ChIP on XRCC2/XRCC4 promoters, luciferase reporters, siRNA knockdown with comet assay under etoposide\",\n      \"pmids\": [\"26300006\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether ZNF281 regulates other DDR pathway genes beyond XRCC2/4\", \"No structural basis for promoter selectivity\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Discovery that GSK-3β phosphorylates ZNF281 at S638 to trigger β-TrCP2-mediated ubiquitination and degradation revealed the primary post-translational control mechanism for ZNF281 protein levels.\",\n      \"evidence\": \"In vitro kinase assay, S638A mutagenesis, co-IP with β-TrCP2, ubiquitination assay in CRC cells\",\n      \"pmids\": [\"29179460\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether other kinases or phospho-sites regulate ZNF281 stability in different tissues\", \"Physiological signals upstream of GSK-3β that modulate ZNF281 turnover\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Showing that ZNF281 physically binds β-catenin and reduces its polyubiquitination connected ZNF281 to Wnt pathway activation at the protein level, beyond transcriptional regulation of β-catenin.\",\n      \"evidence\": \"Co-IP, Topflash luciferase assay, ectopic expression/knockdown in pancreatic cancer cells\",\n      \"pmids\": [\"28523575\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Precise domain on ZNF281 mediating β-catenin interaction not mapped\", \"Mechanism by which ZNF281 blocks β-catenin ubiquitination unresolved\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Live-cell imaging showing ZNF281 recruitment to double-strand breaks within seconds, dependent on PARP and its zinc-finger domain, and its physical interaction with XRCC4 to promote NHEJ, established ZNF281 as a direct participant—not just a transcriptional regulator—in DNA repair.\",\n      \"evidence\": \"Laser micro-irradiation, FRAP, co-IP with XRCC4, NHEJ reporter assay, PARP inhibitor treatment\",\n      \"pmids\": [\"31570788\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether ZNF281 also participates in homologous recombination at damage sites\", \"Structural basis for PARP-dependent recruitment unknown\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Identification of Zfp281 as a GATA1 co-factor at erythroid gene promoters extended ZNF281 function to hematopoietic lineage specification, showing it is required for normal erythroid maturation.\",\n      \"evidence\": \"Reciprocal co-IP, ChIP-seq, conditional knockout mouse model with erythroid maturation block\",\n      \"pmids\": [\"31455666\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether ZNF281 cooperates with GATA1 as an activator or repressor at specific loci\", \"Redundancy with Zfp148 not fully delineated\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Demonstrating that SUFU sequesters ZNF281 in the cytoplasm by masking its NLS revealed a Hedgehog-independent mechanism that spatially limits ZNF281 transcriptional activity, controlling both migration and DDR gene activation.\",\n      \"evidence\": \"Co-IP, subcellular fractionation, NLS mutagenesis, migration assays, in vivo tumor model\",\n      \"pmids\": [\"36220888\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Signals that release ZNF281 from SUFU sequestration not identified\", \"Whether SUFU–ZNF281 interaction is regulated during DNA damage\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Identification of a specific GC-rich binding motif (5'-GGCGGCGGGCGG-3') on the HK2 promoter through which ZNF281 represses HK2 transcription linked ZNF281 to metabolic regulation and mitophagy control.\",\n      \"evidence\": \"ChIP with defined motif, promoter reporter, siRNA knockdown, AAV-shRNA in vivo, mitophagy/senescence readouts\",\n      \"pmids\": [\"36514923\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Genome-wide prevalence and functionality of this motif at other ZNF281 targets unknown\", \"Whether ZNF281 repression of HK2 operates in non-hepatic tissues\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Discovery that ZNF281 physically interacts with NRF1 and PGC-1α and represses TFAM/TFB1M/TFB2M established ZNF281 as a negative regulator of mitochondrial biogenesis, linking its EMT-promoting role to metabolic reprogramming in hepatocellular carcinoma.\",\n      \"evidence\": \"Co-IP, ChIP on TFAM/TFB1M/TFB2M promoters, RNA-seq, OCR measurement, metabolomics, knockdown/rescue\",\n      \"pmids\": [\"37880213\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether ZNF281 globally rewires oxidative phosphorylation or selectively targets mitochondrial transcription\", \"Applicability beyond HCC not tested\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Showing that ZNF281 recruits the NuRD complex (HDAC1/MTA1) to the ANXA10 promoter to silence this tumor suppressor revealed the co-repressor mechanism by which ZNF281 drives HCC invasion.\",\n      \"evidence\": \"ChIP, co-IP identifying HDAC1 and MTA1, RNA-seq, siRNA rescue of ANXA10, pulmonary metastasis model\",\n      \"pmids\": [\"37041757\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether NuRD recruitment is a general mechanism at all ZNF281-repressed loci or specific to ANXA10\", \"Structural basis of ZNF281–NuRD interaction unknown\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Linking ZNF281 to RIPK1/RIPK3/MLKL necroptotic signaling in hepatocytes under lipotoxic stress, and demonstrating prevention of NASH by hepatocyte-specific Zfp281 deletion, expanded ZNF281 function to inflammatory cell death in metabolic liver disease.\",\n      \"evidence\": \"Hepatocyte-specific Zfp281 KO mice, Western blot, metabolic phenotyping, histology\",\n      \"pmids\": [\"39724734\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct transcriptional mechanism linking ZNF281 to RIPK1 upregulation not established\", \"Whether ZNF281 drives necroptosis in tissues beyond liver\"]\n    },\n    {\n      \"year\": 2026,\n      \"claim\": \"Demonstrating that chemotherapeutic agents selectively upregulate ZNF281 translation in cardiomyocytes via the integrated stress response, and that cardiomyocyte-specific ZNF281 deficiency confers complete resistance to anthracycline cardiotoxicity, identified ZNF281 as a druggable mediator of chemotherapy-induced heart injury.\",\n      \"evidence\": \"Cardiomyocyte-specific conditional KO and overexpression mice, ZNF281 small-molecule inhibitor (ZIM), patient myocardial tissue analysis\",\n      \"pmids\": [\"41984928\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Downstream transcriptional targets of ZNF281 in cardiomyocytes that execute cell death not identified\", \"Whether ZIM has off-target effects in tumors\"]\n    },\n    {\n      \"year\": 2026,\n      \"claim\": \"Showing that Znf281 reduces phosphorylated Smad1/5/8 to promote neural induction in Xenopus extended ZNF281 function to BMP pathway antagonism during vertebrate neural development.\",\n      \"evidence\": \"Xenopus overexpression and morpholino knockdown, ectodermal explant assays, Western blot for pSmad1/5/8\",\n      \"pmids\": [\"41536077\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanism by which ZNF281 reduces pSmad1/5/8 (direct or indirect) not elucidated\", \"Relevance to mammalian neural development not tested\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"The genome-wide direct target repertoire, the structural basis for GC-rich DNA recognition and co-repressor recruitment, and the tissue-specific rules governing whether ZNF281 activates or represses transcription remain unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"High\",\n      \"gaps\": [\"No crystal or cryo-EM structure of ZNF281 zinc-finger domain bound to DNA\", \"No genome-wide CUT&RUN or equivalent in matched activation/repression contexts\", \"Integrated model of how post-translational modifications (phosphorylation, ubiquitination, SUFU sequestration) coordinately tune ZNF281 activity is lacking\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [0, 3, 6, 13, 14, 15]},\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [0, 1, 3, 10, 11, 13, 14, 15]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [0, 3, 6, 12, 14, 15]},\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [12]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-73894\", \"supporting_discovery_ids\": [3, 6]},\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [0, 1, 10, 13, 14, 15]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [5, 8, 11]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [7, 18]},\n      {\"term_id\": \"R-HSA-1852241\", \"supporting_discovery_ids\": [14]},\n      {\"term_id\": \"R-HSA-5357801\", \"supporting_discovery_ids\": [16, 19]},\n      {\"term_id\": \"R-HSA-4839726\", \"supporting_discovery_ids\": [15]}\n    ],\n    \"complexes\": [\n      \"NuRD\"\n    ],\n    \"partners\": [\n      \"SNAI1\",\n      \"XRCC4\",\n      \"HDAC1\",\n      \"MTA1\",\n      \"CTNNB1\",\n      \"GATA1\",\n      \"NRF1\",\n      \"SUFU\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}