{"gene":"DMRTA2","run_date":"2026-04-28T17:46:02","timeline":{"discoveries":[{"year":2012,"finding":"Dmrta2 null mutants in mouse show dramatic reduction in medial cortical structures (cortical hem, choroid plexus) and complete loss of the hippocampus, with abnormal cell cycle kinetics and defective patterning. Conditional deletion after the neurogenic phase caused only slight size reduction, indicating Dmrta2 is required specifically during early telencephalon development. Dmrta2 expression was decreased by dominant-negative Tcf and increased by stabilized β-catenin, placing Dmrta2 downstream of the Wnt pathway in neural progenitor maintenance.","method":"Knockout mouse (null and conditional Emx1-cre), gene expression profiling, dominant-negative Tcf / stabilized β-catenin overexpression, histological phenotypic analysis","journal":"PloS one","confidence":"High","confidence_rationale":"Tier 2 — multiple genetic approaches (null KO, conditional KO, gain-of-function) with defined cellular phenotypes and pathway placement","pmids":["23056351"],"is_preprint":false},{"year":2011,"finding":"In zebrafish, Dmrta2 controls neurogenin1 expression in the posterior-dorsal telencephalon by repressing her6 (a Hes-related negative regulator of neurogenin1). Loss-of-function (ha2 mutant) causes expansion of her6 and reduction of neurogenin1, while overexpression and epistatic analyses confirm the Dmrta2→her6⊣neurogenin1 regulatory axis.","method":"Forward genetic screen (ha2 mutant), overexpression experiments, epistatic analyses, in situ hybridization","journal":"Genes to cells","confidence":"High","confidence_rationale":"Tier 2 — loss-of-function mutant plus epistasis experiments with multiple orthogonal readouts","pmids":["22023386"],"is_preprint":false},{"year":2017,"finding":"Dmrta2 maintains neural progenitor cells (NPCs) in the cell cycle and suppresses premature differentiation. Dmrta2 directly binds the Hes1 genomic locus (ChIP) and transcriptionally regulates Hes1; transient Hes1 expression rescues precocious neurogenesis caused by Dmrta2 knockout. Genome-wide RNA-seq confirmed regulation of Hes1 and proneural genes downstream of Dmrta2.","method":"Gain- and loss-of-function in ESC-derived cortical differentiation model, Emx1-cre conditional KO mouse, genome-wide RNA-seq, ChIP (direct Dmrta2 binding to Hes1 locus), Hes1 rescue experiment","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 1–2 — direct DNA binding (ChIP), RNA-seq, genetic rescue, multiple model systems","pmids":["28655839"],"is_preprint":false},{"year":2013,"finding":"Zebrafish Dmrta2 binds directly to the cdkn2c promoter through a specific Dmrta2-binding site, and this binding is required to sustain normal cdkn2c expression during spermatogenesis. A dominant-negative DNA-binding mutant (R106Q) abolished in vitro DNA binding and suppressed cdkn2c expression in adult testis.","method":"In vitro DNA-binding assay, promoter mutation analysis, inducible transgenic expression of DNA-binding mutant (Dmrta2-R106Q), protein-binding assays","journal":"Biology of reproduction","confidence":"Medium","confidence_rationale":"Tier 2 — in vitro DNA binding + promoter mutagenesis + in vivo transgenic model, single lab","pmids":["23175770"],"is_preprint":false},{"year":2025,"finding":"Dmrta2 acts as a DNA-binding-dependent transcriptional repressor of Pax6, controlling cortical patterning. In P19 cells, Dmrta2 represses the Pax6 E60 enhancer in a DNA-binding-dependent manner. Epistatic analysis in allelic combinations of Dmrta2 and Pax6 mutant/overexpressing embryos showed Dmrta2 cooperates with Pax6 in maintaining cortical identity while repressing it to control pallium-subpallium boundary. Dmrta2 also binds components of the NuRD repressor complex and interacts with zinc finger protein Zfp423. A human point mutation impairing Dmrta2 DNA binding causes agenesis of the corpus callosum, pachygyria, and absence of the cingulate gyrus.","method":"Epistatic genetic analysis in mice (allelic combinations), P19 cell reporter/repressor assays, co-immunoprecipitation (NuRD complex, Zfp423 interaction), human mutation identification and functional characterization","journal":"eNeuro","confidence":"High","confidence_rationale":"Tier 1–2 — multiple orthogonal methods (epistasis, cell-based mechanistic assays, protein interaction studies, human mutation), strong mechanistic framework","pmids":["40541527"],"is_preprint":false},{"year":2025,"finding":"Dmrta2 is required for choroid plexus (ChP) development: conditional loss of Dmrta2 in medial telencephalic progenitors leads to postnatal hydrocephalus due to compromised ChP cytoarchitecture. Emx2 and Dmrta2 regulate a similar but largely non-overlapping set of direct target genes; common direct targets include key cortical development regulators. Emx2 coordinates with LIM-domain binding protein Ldb1 to activate/repress targets, functioning cooperatively but distinctly from Dmrta2.","method":"Conditional KO mouse (medial telencephalic progenitors), molecular genetics, interaction partner identification, gene expression analysis","journal":"The Journal of neuroscience","confidence":"Medium","confidence_rationale":"Tier 2 — conditional KO with defined phenotype plus molecular interaction studies, single lab","pmids":["40456611"],"is_preprint":false},{"year":2024,"finding":"DMRTA2 interacts with HSP90β by co-immunoprecipitation, competitively inhibiting the HSP90β–p53 interaction, thereby suppressing p53 ubiquitination and nuclear export. This stabilizes wild-type p53 and activates the p53 pathway to inhibit proliferation and invasion of NSCLC cells. DMRTA2 also shows dual nuclear/cytoplasmic localization relevant to this transport mechanism.","method":"Co-immunoprecipitation, CRISPR knockout, MTS assay, flow cytometry, Western blot, immunofluorescence, qRT-PCR","journal":"Current issues in molecular biology","confidence":"Medium","confidence_rationale":"Tier 2 — reciprocal Co-IP plus functional cellular assays with CRISPR KO, single lab","pmids":["40728966"],"is_preprint":false},{"year":2024,"finding":"Knockdown of DMRTA2 in human glioma cells impairs proliferation and tumor sphere formation, and reduces glioma stem-like cell-dependent tube formation in an in vitro angiogenesis assay, indicating DMRTA2 supports glioma stem cell-mediated neovascularization. DMRTA2 protein co-localizes with pericyte-specific markers around blood vessels in GBM.","method":"shRNA knockdown, tumor sphere formation assay, in vitro angiogenesis/tube formation assay, immunohistochemistry with pericyte marker co-localization","journal":"Cell death & disease","confidence":"Medium","confidence_rationale":"Tier 3 — knockdown with multiple functional readouts but no direct molecular mechanism established","pmids":["38509074"],"is_preprint":false},{"year":2026,"finding":"DMRTA2 knockout in human ESC-derived cerebral organoids leads to smaller organoid size and fewer radial glial (RG) cells, demonstrating a cell-autonomous role in maintaining RG progenitor identity. Loss of DMRTA2 in paediatric high-grade glioma (DHG-H3G34) cells results in enhanced neuronal differentiation, fewer RG-like glioma cells, and impaired tumorigenicity.","method":"CRISPR KO in hESC-derived cerebral organoids, single-cell RNA-seq, loss-of-function in glioma cell lines with tumorigenicity assays","journal":"Journal of cellular and molecular medicine","confidence":"Medium","confidence_rationale":"Tier 2 — KO in human organoid model with defined cellular phenotype, supported by scRNA-seq","pmids":["41844556"],"is_preprint":false}],"current_model":"DMRTA2 is a DM-domain transcription factor that functions primarily as a DNA-binding-dependent transcriptional repressor (of Pax6, via the NuRD complex/Zfp423, and of her6/Hes-related genes) and activator (of Hes1) in cortical and telencephalic progenitors to maintain neural progenitor cell cycle re-entry and suppress premature neuronal differentiation, while also being required for choroid plexus integrity; outside the brain it stabilizes p53 in NSCLC by competitively displacing HSP90β from p53, and in zebrafish spermatogenesis it directly binds the cdkn2c promoter to sustain its expression."},"narrative":{"teleology":[{"year":2011,"claim":"Establishing DMRTA2 as a transcriptional regulator in telencephalic neurogenesis: it was unknown how dorsal telencephalic proneural gene expression was controlled, and forward genetics revealed that Dmrta2 represses her6 to permit neurogenin1 expression.","evidence":"Forward genetic screen (ha2 mutant) in zebrafish with epistatic and overexpression analyses","pmids":["22023386"],"confidence":"High","gaps":["Mechanism of her6 repression (direct binding vs. indirect) not resolved","Mammalian conservation of this specific regulatory axis not tested"]},{"year":2012,"claim":"Demonstrating that Dmrta2 is essential for early telencephalic patterning and is a Wnt-pathway effector: it was unknown whether Dmrta2 had a required developmental role, and null/conditional knockouts revealed severe medial cortical defects including hippocampal agenesis, with Dmrta2 positioned downstream of Wnt/β-catenin signaling.","evidence":"Null and Emx1-cre conditional KO mice, dominant-negative Tcf and stabilized β-catenin overexpression, histological and expression analysis","pmids":["23056351"],"confidence":"High","gaps":["Direct Wnt-responsive elements in Dmrta2 locus not identified","Downstream transcriptional targets not yet defined genome-wide"]},{"year":2013,"claim":"Identifying a direct transcriptional target outside the brain: it was unknown how Dmrta2 functioned in non-neural tissues, and promoter binding assays showed Dmrta2 directly binds the cdkn2c promoter to sustain its expression during spermatogenesis, requiring an intact DM-domain.","evidence":"In vitro DNA-binding assays, promoter mutagenesis, inducible dominant-negative transgenic (R106Q) in zebrafish testis","pmids":["23175770"],"confidence":"Medium","gaps":["In vivo ChIP at the cdkn2c locus not performed","Functional consequence of cdkn2c loss on spermatogonial proliferation not directly tested","Single laboratory finding"]},{"year":2017,"claim":"Defining the core progenitor-maintenance mechanism: it was unclear how Dmrta2 kept cortical progenitors cycling, and ChIP plus rescue experiments demonstrated that Dmrta2 directly binds and activates Hes1, whose re-expression rescues precocious neurogenesis in Dmrta2-null progenitors.","evidence":"ChIP in ESC-derived cortical progenitors, RNA-seq, Hes1 rescue in Emx1-cre conditional KO mouse","pmids":["28655839"],"confidence":"High","gaps":["Whether Dmrta2 activates Hes1 alone or through co-activators not determined","Genome-wide direct binding landscape (ChIP-seq) not reported"]},{"year":2024,"claim":"Revealing a cytoplasmic, non-transcriptional function: it was unknown whether DMRTA2 acted outside the nucleus, and co-immunoprecipitation showed DMRTA2 competitively displaces HSP90β from p53, blocking p53 ubiquitination and nuclear export, thereby stabilizing wild-type p53 and suppressing NSCLC proliferation.","evidence":"Reciprocal Co-IP, CRISPR KO, proliferation and apoptosis assays in NSCLC cell lines","pmids":["40728966"],"confidence":"Medium","gaps":["Competition mechanism not validated with purified proteins or structural data","In vivo relevance in NSCLC models not demonstrated","Single laboratory finding"]},{"year":2024,"claim":"Linking DMRTA2 to glioma stem cell biology: it was unknown whether DMRTA2 had a role in brain tumors, and knockdown impaired glioma sphere formation and stem cell-dependent angiogenesis, with DMRTA2 co-localizing with pericyte markers in GBM vasculature.","evidence":"shRNA knockdown, tumor sphere and tube formation assays, immunohistochemistry in human GBM","pmids":["38509074"],"confidence":"Medium","gaps":["Direct molecular targets mediating glioma stem cell maintenance not identified","Pericyte-like role is correlative based on marker co-localization only"]},{"year":2025,"claim":"Elucidating the repressive mechanism at Pax6 and linking a human mutation to cortical malformation: it was unknown how Dmrta2 repressed target genes, and experiments showed DNA-binding-dependent repression of the Pax6 enhancer via recruitment of the NuRD complex and Zfp423, while a human loss-of-binding mutation caused agenesis of the corpus callosum and pachygyria.","evidence":"Epistatic allelic series in mouse, P19 cell reporter assays, Co-IP for NuRD and Zfp423, human mutation functional characterization","pmids":["40541527"],"confidence":"High","gaps":["NuRD complex recruitment not confirmed by ChIP at Pax6 locus in vivo","Whether Zfp423 is required for repression or has an independent role not resolved"]},{"year":2025,"claim":"Establishing Dmrta2 as essential for choroid plexus integrity: it was unclear why Dmrta2 mutants develop hydrocephalus, and conditional deletion showed compromised choroid plexus cytoarchitecture and identified largely non-overlapping direct targets from the related factor Emx2.","evidence":"Conditional KO in medial telencephalic progenitors, gene expression analysis, interaction partner identification","pmids":["40456611"],"confidence":"Medium","gaps":["Direct target genes in choroid plexus epithelium not individually validated","Mechanism of hydrocephalus (CSF overproduction vs. structural failure) not distinguished"]},{"year":2026,"claim":"Confirming cell-autonomous progenitor maintenance in human cells: it was unknown whether the murine findings translated to human, and DMRTA2 KO in human cerebral organoids reduced radial glial cells, while KO in paediatric glioma cells enhanced neuronal differentiation and reduced tumorigenicity.","evidence":"CRISPR KO in hESC-derived cerebral organoids, scRNA-seq, loss-of-function in DHG-H3G34 glioma cells with tumorigenicity assays","pmids":["41844556"],"confidence":"Medium","gaps":["Downstream transcriptional program in human RG cells not compared to mouse","Whether Hes1 activation is the conserved mechanism in human organoids not tested"]},{"year":null,"claim":"Genome-wide direct target identification via ChIP-seq in cortical progenitors and structural characterization of DMRTA2-NuRD interactions remain open, as does the mechanistic relationship between the nuclear transcriptional and cytoplasmic p53-stabilizing functions.","evidence":"","pmids":[],"confidence":"Low","gaps":["No ChIP-seq defining genome-wide direct binding landscape","No structural basis for NuRD or HSP90β interaction","How nuclear vs. cytoplasmic functions are partitioned in different tissues is unknown"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[2,3,4]},{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[1,2,3,4]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[2,3,4]},{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[6]}],"pathway":[{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[0,1,2,4,5]},{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[1,2,3,4]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[0,6]}],"complexes":["NuRD complex"],"partners":["ZFP423","HSP90AB1","TP53","PAX6","EMX2"],"other_free_text":[]},"mechanistic_narrative":"DMRTA2 is a DM-domain transcription factor that maintains neural progenitor identity and controls cortical patterning during telencephalon development. It directly binds the Hes1 locus to sustain Hes1 expression and promote progenitor cell cycle re-entry, while repressing Pax6 via interaction with the NuRD corepressor complex and Zfp423, thereby coordinating the balance between progenitor maintenance and neuronal differentiation [PMID:28655839, PMID:40541527]. Loss of Dmrta2 in mouse causes hippocampal agenesis, loss of medial cortical structures, and choroid plexus defects leading to hydrocephalus, and a human DNA-binding mutation causes agenesis of the corpus callosum and pachygyria [PMID:23056351, PMID:40456611, PMID:40541527]. Outside the nervous system, DMRTA2 stabilizes p53 by competitively displacing HSP90β, suppressing p53 ubiquitination and nuclear export in NSCLC cells, and directly binds the cdkn2c promoter during zebrafish spermatogenesis [PMID:40728966, PMID:23175770]."},"prefetch_data":{"uniprot":{"accession":"Q96SC8","full_name":"Doublesex- and mab-3-related transcription factor A2","aliases":["Doublesex- and mab-3-related transcription factor 5"],"length_aa":542,"mass_kda":53.4,"function":"May be involved in sexual development","subcellular_location":"Nucleus","url":"https://www.uniprot.org/uniprotkb/Q96SC8/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/DMRTA2","classification":"Not Classified","n_dependent_lines":106,"n_total_lines":1208,"dependency_fraction":0.08774834437086093},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/DMRTA2","total_profiled":1310},"omim":[{"mim_id":"614804","title":"DOUBLESEX- AND MAB3-RELATED TRANSCRIPTION FACTOR A2; DMRTA2","url":"https://www.omim.org/entry/614804"},{"mim_id":"614803","title":"DOUBLESEX- AND MAB3-RELATED TRANSCRIPTION FACTOR A1; DMRTA1","url":"https://www.omim.org/entry/614803"},{"mim_id":"614754","title":"DOUBLESEX- AND MAB3-RELATED TRANSCRIPTION FACTOR 3; DMRT3","url":"https://www.omim.org/entry/614754"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Mitochondria","reliability":"Approved"},{"location":"Nucleoplasm","reliability":"Additional"}],"tissue_specificity":"Tissue enhanced","tissue_distribution":"Detected in some","driving_tissues":[{"tissue":"esophagus","ntpm":1.4},{"tissue":"pituitary gland","ntpm":1.9},{"tissue":"testis","ntpm":1.7}],"url":"https://www.proteinatlas.org/search/DMRTA2"},"hgnc":{"alias_symbol":[],"prev_symbol":[]},"alphafold":{"accession":"Q96SC8","domains":[{"cath_id":"-","chopping":"67-94","consensus_level":"medium","plddt":95.8057,"start":67,"end":94},{"cath_id":"1.20.5","chopping":"97-148","consensus_level":"medium","plddt":85.2973,"start":97,"end":148},{"cath_id":"1.10.8","chopping":"317-356","consensus_level":"high","plddt":89.3268,"start":317,"end":356}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q96SC8","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q96SC8-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q96SC8-F1-predicted_aligned_error_v6.png","plddt_mean":55.81},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=DMRTA2","jax_strain_url":"https://www.jax.org/strain/search?query=DMRTA2"},"sequence":{"accession":"Q96SC8","fasta_url":"https://rest.uniprot.org/uniprotkb/Q96SC8.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q96SC8/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q96SC8"}},"corpus_meta":[{"pmid":"16951079","id":"PMC_16951079","title":"Amh and Dmrta2 genes map to tilapia (Oreochromis spp.) linkage group 23 within quantitative trait locus regions for sex determination.","date":"2006","source":"Genetics","url":"https://pubmed.ncbi.nlm.nih.gov/16951079","citation_count":72,"is_preprint":false},{"pmid":"23056351","id":"PMC_23056351","title":"The mammalian DM domain transcription factor Dmrta2 is required for early embryonic development of the cerebral cortex.","date":"2012","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/23056351","citation_count":53,"is_preprint":false},{"pmid":"22023386","id":"PMC_22023386","title":"Zebrafish Dmrta2 regulates neurogenesis in the telencephalon.","date":"2011","source":"Genes to cells : devoted to molecular & cellular mechanisms","url":"https://pubmed.ncbi.nlm.nih.gov/22023386","citation_count":38,"is_preprint":false},{"pmid":"28655839","id":"PMC_28655839","title":"The doublesex-related Dmrta2 safeguards neural progenitor maintenance involving transcriptional regulation of Hes1.","date":"2017","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/28655839","citation_count":31,"is_preprint":false},{"pmid":"23175770","id":"PMC_23175770","title":"Zebrafish dmrta2 regulates the expression of cdkn2c in spermatogenesis in the adult testis.","date":"2013","source":"Biology of reproduction","url":"https://pubmed.ncbi.nlm.nih.gov/23175770","citation_count":23,"is_preprint":false},{"pmid":"38509074","id":"PMC_38509074","title":"DMRTA2 supports glioma stem-cell mediated neovascularization in glioblastoma.","date":"2024","source":"Cell death & disease","url":"https://pubmed.ncbi.nlm.nih.gov/38509074","citation_count":6,"is_preprint":false},{"pmid":"24668652","id":"PMC_24668652","title":"Cloning the Dmrt1 and DmrtA2 genes of ayu (Plecoglossus altivelis) and mapping their expression in adult, larval, and embryonic stages.","date":"2014","source":"Dong wu xue yan jiu = Zoological research","url":"https://pubmed.ncbi.nlm.nih.gov/24668652","citation_count":6,"is_preprint":false},{"pmid":"40541527","id":"PMC_40541527","title":"Evidence That Dmrta2 Acts through Repression of Pax6 in Cortical Patterning and Identification of a Mutation Impairing DNA Recognition Associated with Microcephaly in Human.","date":"2025","source":"eNeuro","url":"https://pubmed.ncbi.nlm.nih.gov/40541527","citation_count":2,"is_preprint":false},{"pmid":"40456611","id":"PMC_40456611","title":"Novel Insights into Emx2 and Dmrta2 Cooperation during Cortex Development and Evidence for Dmrta2 Function in the Choroid Plexus.","date":"2025","source":"The Journal of neuroscience : the official journal of the Society for Neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/40456611","citation_count":1,"is_preprint":false},{"pmid":"41844556","id":"PMC_41844556","title":"DMRTA2 Regulates Radial Glial Maintenance and Tumorigenicity of Paediatric High-Grade Glioma.","date":"2026","source":"Journal of cellular and molecular medicine","url":"https://pubmed.ncbi.nlm.nih.gov/41844556","citation_count":0,"is_preprint":false},{"pmid":"40854484","id":"PMC_40854484","title":"Integrated yeast one-hybrid and molecular docking reveal the binding specificity of FTZ-F1 to GnRHR and Dmrta2 promoters in the scallop, Chlamys farreri.","date":"2025","source":"Comparative biochemistry and physiology. Part B, Biochemistry & molecular biology","url":"https://pubmed.ncbi.nlm.nih.gov/40854484","citation_count":0,"is_preprint":false},{"pmid":"40728966","id":"PMC_40728966","title":"The Interaction of DMRTA2 with HSP90β Inhibits p53 Ubiquitination and Activates the p53 Pathway to Suppress the Malignant Progression of Non-Small-Cell Lung Cancer.","date":"2025","source":"Current issues in molecular biology","url":"https://pubmed.ncbi.nlm.nih.gov/40728966","citation_count":0,"is_preprint":false},{"pmid":null,"id":"bio_10.1101_2024.09.19.613943","title":"Novel insights into Emx2 and Dmrta2 cooperation during cortex development and evidence for Dmrta2 function in choroid plexus","date":"2024-09-20","source":"bioRxiv","url":"https://doi.org/10.1101/2024.09.19.613943","citation_count":0,"is_preprint":true},{"pmid":null,"id":"bio_10.1101_2024.09.20.614077","title":"Evidence that Dmrta2 acts as a transcriptional repressor of<i>Pax6</i>in murine cortical progenitors and identification of a mutation crucial for DNA recognition associated with microcephaly in human","date":"2024-09-20","source":"bioRxiv","url":"https://doi.org/10.1101/2024.09.20.614077","citation_count":0,"is_preprint":true}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":8786,"output_tokens":2609,"usd":0.032746},"stage2":{"model":"claude-opus-4-6","input_tokens":5933,"output_tokens":2649,"usd":0.143835},"total_usd":0.176581,"stage1_batch_id":"msgbatch_0118RScg3WGaGkaZRtWZbtce","stage2_batch_id":"msgbatch_01Cpfzvtbj42aqp5oYZ5Te2s","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2012,\n      \"finding\": \"Dmrta2 null mutants in mouse show dramatic reduction in medial cortical structures (cortical hem, choroid plexus) and complete loss of the hippocampus, with abnormal cell cycle kinetics and defective patterning. Conditional deletion after the neurogenic phase caused only slight size reduction, indicating Dmrta2 is required specifically during early telencephalon development. Dmrta2 expression was decreased by dominant-negative Tcf and increased by stabilized β-catenin, placing Dmrta2 downstream of the Wnt pathway in neural progenitor maintenance.\",\n      \"method\": \"Knockout mouse (null and conditional Emx1-cre), gene expression profiling, dominant-negative Tcf / stabilized β-catenin overexpression, histological phenotypic analysis\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple genetic approaches (null KO, conditional KO, gain-of-function) with defined cellular phenotypes and pathway placement\",\n      \"pmids\": [\"23056351\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"In zebrafish, Dmrta2 controls neurogenin1 expression in the posterior-dorsal telencephalon by repressing her6 (a Hes-related negative regulator of neurogenin1). Loss-of-function (ha2 mutant) causes expansion of her6 and reduction of neurogenin1, while overexpression and epistatic analyses confirm the Dmrta2→her6⊣neurogenin1 regulatory axis.\",\n      \"method\": \"Forward genetic screen (ha2 mutant), overexpression experiments, epistatic analyses, in situ hybridization\",\n      \"journal\": \"Genes to cells\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — loss-of-function mutant plus epistasis experiments with multiple orthogonal readouts\",\n      \"pmids\": [\"22023386\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"Dmrta2 maintains neural progenitor cells (NPCs) in the cell cycle and suppresses premature differentiation. Dmrta2 directly binds the Hes1 genomic locus (ChIP) and transcriptionally regulates Hes1; transient Hes1 expression rescues precocious neurogenesis caused by Dmrta2 knockout. Genome-wide RNA-seq confirmed regulation of Hes1 and proneural genes downstream of Dmrta2.\",\n      \"method\": \"Gain- and loss-of-function in ESC-derived cortical differentiation model, Emx1-cre conditional KO mouse, genome-wide RNA-seq, ChIP (direct Dmrta2 binding to Hes1 locus), Hes1 rescue experiment\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 — direct DNA binding (ChIP), RNA-seq, genetic rescue, multiple model systems\",\n      \"pmids\": [\"28655839\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Zebrafish Dmrta2 binds directly to the cdkn2c promoter through a specific Dmrta2-binding site, and this binding is required to sustain normal cdkn2c expression during spermatogenesis. A dominant-negative DNA-binding mutant (R106Q) abolished in vitro DNA binding and suppressed cdkn2c expression in adult testis.\",\n      \"method\": \"In vitro DNA-binding assay, promoter mutation analysis, inducible transgenic expression of DNA-binding mutant (Dmrta2-R106Q), protein-binding assays\",\n      \"journal\": \"Biology of reproduction\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — in vitro DNA binding + promoter mutagenesis + in vivo transgenic model, single lab\",\n      \"pmids\": [\"23175770\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"Dmrta2 acts as a DNA-binding-dependent transcriptional repressor of Pax6, controlling cortical patterning. In P19 cells, Dmrta2 represses the Pax6 E60 enhancer in a DNA-binding-dependent manner. Epistatic analysis in allelic combinations of Dmrta2 and Pax6 mutant/overexpressing embryos showed Dmrta2 cooperates with Pax6 in maintaining cortical identity while repressing it to control pallium-subpallium boundary. Dmrta2 also binds components of the NuRD repressor complex and interacts with zinc finger protein Zfp423. A human point mutation impairing Dmrta2 DNA binding causes agenesis of the corpus callosum, pachygyria, and absence of the cingulate gyrus.\",\n      \"method\": \"Epistatic genetic analysis in mice (allelic combinations), P19 cell reporter/repressor assays, co-immunoprecipitation (NuRD complex, Zfp423 interaction), human mutation identification and functional characterization\",\n      \"journal\": \"eNeuro\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 — multiple orthogonal methods (epistasis, cell-based mechanistic assays, protein interaction studies, human mutation), strong mechanistic framework\",\n      \"pmids\": [\"40541527\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"Dmrta2 is required for choroid plexus (ChP) development: conditional loss of Dmrta2 in medial telencephalic progenitors leads to postnatal hydrocephalus due to compromised ChP cytoarchitecture. Emx2 and Dmrta2 regulate a similar but largely non-overlapping set of direct target genes; common direct targets include key cortical development regulators. Emx2 coordinates with LIM-domain binding protein Ldb1 to activate/repress targets, functioning cooperatively but distinctly from Dmrta2.\",\n      \"method\": \"Conditional KO mouse (medial telencephalic progenitors), molecular genetics, interaction partner identification, gene expression analysis\",\n      \"journal\": \"The Journal of neuroscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — conditional KO with defined phenotype plus molecular interaction studies, single lab\",\n      \"pmids\": [\"40456611\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"DMRTA2 interacts with HSP90β by co-immunoprecipitation, competitively inhibiting the HSP90β–p53 interaction, thereby suppressing p53 ubiquitination and nuclear export. This stabilizes wild-type p53 and activates the p53 pathway to inhibit proliferation and invasion of NSCLC cells. DMRTA2 also shows dual nuclear/cytoplasmic localization relevant to this transport mechanism.\",\n      \"method\": \"Co-immunoprecipitation, CRISPR knockout, MTS assay, flow cytometry, Western blot, immunofluorescence, qRT-PCR\",\n      \"journal\": \"Current issues in molecular biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal Co-IP plus functional cellular assays with CRISPR KO, single lab\",\n      \"pmids\": [\"40728966\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"Knockdown of DMRTA2 in human glioma cells impairs proliferation and tumor sphere formation, and reduces glioma stem-like cell-dependent tube formation in an in vitro angiogenesis assay, indicating DMRTA2 supports glioma stem cell-mediated neovascularization. DMRTA2 protein co-localizes with pericyte-specific markers around blood vessels in GBM.\",\n      \"method\": \"shRNA knockdown, tumor sphere formation assay, in vitro angiogenesis/tube formation assay, immunohistochemistry with pericyte marker co-localization\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — knockdown with multiple functional readouts but no direct molecular mechanism established\",\n      \"pmids\": [\"38509074\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"DMRTA2 knockout in human ESC-derived cerebral organoids leads to smaller organoid size and fewer radial glial (RG) cells, demonstrating a cell-autonomous role in maintaining RG progenitor identity. Loss of DMRTA2 in paediatric high-grade glioma (DHG-H3G34) cells results in enhanced neuronal differentiation, fewer RG-like glioma cells, and impaired tumorigenicity.\",\n      \"method\": \"CRISPR KO in hESC-derived cerebral organoids, single-cell RNA-seq, loss-of-function in glioma cell lines with tumorigenicity assays\",\n      \"journal\": \"Journal of cellular and molecular medicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — KO in human organoid model with defined cellular phenotype, supported by scRNA-seq\",\n      \"pmids\": [\"41844556\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"DMRTA2 is a DM-domain transcription factor that functions primarily as a DNA-binding-dependent transcriptional repressor (of Pax6, via the NuRD complex/Zfp423, and of her6/Hes-related genes) and activator (of Hes1) in cortical and telencephalic progenitors to maintain neural progenitor cell cycle re-entry and suppress premature neuronal differentiation, while also being required for choroid plexus integrity; outside the brain it stabilizes p53 in NSCLC by competitively displacing HSP90β from p53, and in zebrafish spermatogenesis it directly binds the cdkn2c promoter to sustain its expression.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"DMRTA2 is a DM-domain transcription factor that maintains neural progenitor identity and controls cortical patterning during telencephalon development. It directly binds the Hes1 locus to sustain Hes1 expression and promote progenitor cell cycle re-entry, while repressing Pax6 via interaction with the NuRD corepressor complex and Zfp423, thereby coordinating the balance between progenitor maintenance and neuronal differentiation [PMID:28655839, PMID:40541527]. Loss of Dmrta2 in mouse causes hippocampal agenesis, loss of medial cortical structures, and choroid plexus defects leading to hydrocephalus, and a human DNA-binding mutation causes agenesis of the corpus callosum and pachygyria [PMID:23056351, PMID:40456611, PMID:40541527]. Outside the nervous system, DMRTA2 stabilizes p53 by competitively displacing HSP90β, suppressing p53 ubiquitination and nuclear export in NSCLC cells, and directly binds the cdkn2c promoter during zebrafish spermatogenesis [PMID:40728966, PMID:23175770].\",\n  \"teleology\": [\n    {\n      \"year\": 2011,\n      \"claim\": \"Establishing DMRTA2 as a transcriptional regulator in telencephalic neurogenesis: it was unknown how dorsal telencephalic proneural gene expression was controlled, and forward genetics revealed that Dmrta2 represses her6 to permit neurogenin1 expression.\",\n      \"evidence\": \"Forward genetic screen (ha2 mutant) in zebrafish with epistatic and overexpression analyses\",\n      \"pmids\": [\"22023386\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism of her6 repression (direct binding vs. indirect) not resolved\", \"Mammalian conservation of this specific regulatory axis not tested\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Demonstrating that Dmrta2 is essential for early telencephalic patterning and is a Wnt-pathway effector: it was unknown whether Dmrta2 had a required developmental role, and null/conditional knockouts revealed severe medial cortical defects including hippocampal agenesis, with Dmrta2 positioned downstream of Wnt/β-catenin signaling.\",\n      \"evidence\": \"Null and Emx1-cre conditional KO mice, dominant-negative Tcf and stabilized β-catenin overexpression, histological and expression analysis\",\n      \"pmids\": [\"23056351\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct Wnt-responsive elements in Dmrta2 locus not identified\", \"Downstream transcriptional targets not yet defined genome-wide\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Identifying a direct transcriptional target outside the brain: it was unknown how Dmrta2 functioned in non-neural tissues, and promoter binding assays showed Dmrta2 directly binds the cdkn2c promoter to sustain its expression during spermatogenesis, requiring an intact DM-domain.\",\n      \"evidence\": \"In vitro DNA-binding assays, promoter mutagenesis, inducible dominant-negative transgenic (R106Q) in zebrafish testis\",\n      \"pmids\": [\"23175770\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"In vivo ChIP at the cdkn2c locus not performed\", \"Functional consequence of cdkn2c loss on spermatogonial proliferation not directly tested\", \"Single laboratory finding\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Defining the core progenitor-maintenance mechanism: it was unclear how Dmrta2 kept cortical progenitors cycling, and ChIP plus rescue experiments demonstrated that Dmrta2 directly binds and activates Hes1, whose re-expression rescues precocious neurogenesis in Dmrta2-null progenitors.\",\n      \"evidence\": \"ChIP in ESC-derived cortical progenitors, RNA-seq, Hes1 rescue in Emx1-cre conditional KO mouse\",\n      \"pmids\": [\"28655839\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether Dmrta2 activates Hes1 alone or through co-activators not determined\", \"Genome-wide direct binding landscape (ChIP-seq) not reported\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Revealing a cytoplasmic, non-transcriptional function: it was unknown whether DMRTA2 acted outside the nucleus, and co-immunoprecipitation showed DMRTA2 competitively displaces HSP90β from p53, blocking p53 ubiquitination and nuclear export, thereby stabilizing wild-type p53 and suppressing NSCLC proliferation.\",\n      \"evidence\": \"Reciprocal Co-IP, CRISPR KO, proliferation and apoptosis assays in NSCLC cell lines\",\n      \"pmids\": [\"40728966\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Competition mechanism not validated with purified proteins or structural data\", \"In vivo relevance in NSCLC models not demonstrated\", \"Single laboratory finding\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Linking DMRTA2 to glioma stem cell biology: it was unknown whether DMRTA2 had a role in brain tumors, and knockdown impaired glioma sphere formation and stem cell-dependent angiogenesis, with DMRTA2 co-localizing with pericyte markers in GBM vasculature.\",\n      \"evidence\": \"shRNA knockdown, tumor sphere and tube formation assays, immunohistochemistry in human GBM\",\n      \"pmids\": [\"38509074\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct molecular targets mediating glioma stem cell maintenance not identified\", \"Pericyte-like role is correlative based on marker co-localization only\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Elucidating the repressive mechanism at Pax6 and linking a human mutation to cortical malformation: it was unknown how Dmrta2 repressed target genes, and experiments showed DNA-binding-dependent repression of the Pax6 enhancer via recruitment of the NuRD complex and Zfp423, while a human loss-of-binding mutation caused agenesis of the corpus callosum and pachygyria.\",\n      \"evidence\": \"Epistatic allelic series in mouse, P19 cell reporter assays, Co-IP for NuRD and Zfp423, human mutation functional characterization\",\n      \"pmids\": [\"40541527\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"NuRD complex recruitment not confirmed by ChIP at Pax6 locus in vivo\", \"Whether Zfp423 is required for repression or has an independent role not resolved\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Establishing Dmrta2 as essential for choroid plexus integrity: it was unclear why Dmrta2 mutants develop hydrocephalus, and conditional deletion showed compromised choroid plexus cytoarchitecture and identified largely non-overlapping direct targets from the related factor Emx2.\",\n      \"evidence\": \"Conditional KO in medial telencephalic progenitors, gene expression analysis, interaction partner identification\",\n      \"pmids\": [\"40456611\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct target genes in choroid plexus epithelium not individually validated\", \"Mechanism of hydrocephalus (CSF overproduction vs. structural failure) not distinguished\"]\n    },\n    {\n      \"year\": 2026,\n      \"claim\": \"Confirming cell-autonomous progenitor maintenance in human cells: it was unknown whether the murine findings translated to human, and DMRTA2 KO in human cerebral organoids reduced radial glial cells, while KO in paediatric glioma cells enhanced neuronal differentiation and reduced tumorigenicity.\",\n      \"evidence\": \"CRISPR KO in hESC-derived cerebral organoids, scRNA-seq, loss-of-function in DHG-H3G34 glioma cells with tumorigenicity assays\",\n      \"pmids\": [\"41844556\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Downstream transcriptional program in human RG cells not compared to mouse\", \"Whether Hes1 activation is the conserved mechanism in human organoids not tested\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"Genome-wide direct target identification via ChIP-seq in cortical progenitors and structural characterization of DMRTA2-NuRD interactions remain open, as does the mechanistic relationship between the nuclear transcriptional and cytoplasmic p53-stabilizing functions.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No ChIP-seq defining genome-wide direct binding landscape\", \"No structural basis for NuRD or HSP90β interaction\", \"How nuclear vs. cytoplasmic functions are partitioned in different tissues is unknown\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [2, 3, 4]},\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [1, 2, 3, 4]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [2, 3, 4]},\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [6]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [0, 1, 2, 4, 5]},\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [1, 2, 3, 4]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [0, 6]}\n    ],\n    \"complexes\": [\n      \"NuRD complex\"\n    ],\n    \"partners\": [\n      \"ZFP423\",\n      \"HSP90AB1\",\n      \"TP53\",\n      \"PAX6\",\n      \"EMX2\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}