{"gene":"SOX12","run_date":"2026-06-10T07:46:38","timeline":{"discoveries":[{"year":2008,"finding":"SOX12 (SoxC group) contains a C-terminal 33-residue transactivation domain (TAD) that is required for transcriptional activation; SOX12 is a weaker transactivator than SOX11 due to a less stable alpha-helical structure in its TAD. Acidic domains and the TAD interfere with DNA binding, and the three SoxC proteins can compete with one another in reporter gene transactivation.","method":"Reporter gene transactivation assays, domain deletion and mutagenesis, structural analysis of TAD alpha-helical stability","journal":"Nucleic acids research","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro reporter assays with mutagenesis and structural characterization of the TAD, single lab but multiple orthogonal methods","pmids":["18403418"],"is_preprint":false},{"year":2008,"finding":"Sox12-deficient mice develop normally and are fertile, demonstrating that Sox4 and Sox11 functionally compensate for Sox12 loss during mouse development due to overlapping expression and higher transactivation rates, but compensation is not reciprocal (Sox12 cannot replace Sox4/Sox11).","method":"Sox12 knockout mouse generation, phenotypic analysis, comparison of expression patterns and transactivation activity among SoxC members","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo knockout with defined phenotypic readout plus in vitro functional comparison, replicated observation across two independent labs (PMID 18403418 and 18505825)","pmids":["18505825"],"is_preprint":false},{"year":2015,"finding":"SOX12 promotes HCC metastasis by directly transactivating Twist1 (inducing EMT) and FGFBP1 (promoting invasion). FoxQ1 directly binds the SOX12 promoter and transactivates SOX12 expression, placing SOX12 downstream of FoxQ1 in an HCC metastasis pathway.","method":"Serial deletion, site-directed mutagenesis, chromatin immunoprecipitation (ChIP) assays, luciferase reporter assays, overexpression/knockdown rescue experiments, in vivo metastasis models","journal":"Hepatology (Baltimore, Md.)","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — ChIP + mutagenesis + luciferase reporters + in vivo rescue, single lab with multiple orthogonal methods","pmids":["25704764"],"is_preprint":false},{"year":2019,"finding":"SOX12 promotes colorectal cancer cell proliferation and metastasis by directly transactivating glutaminase (GLS), glutamic oxaloacetic transaminase 2 (GOT2), and asparagine synthetase (ASNS), thereby facilitating asparagine synthesis. HIF-1α directly binds the SOX12 promoter and induces SOX12 expression under hypoxic conditions.","method":"Serial deletion, site-directed mutagenesis, luciferase reporter assay, ChIP assay, overexpression/knockdown rescue experiments, in vivo xenograft models","journal":"Cell death & disease","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — ChIP + mutagenesis + luciferase + in vivo models in single lab with multiple orthogonal methods","pmids":["30858360"],"is_preprint":false},{"year":2014,"finding":"SOX12 knockdown increases metastatic growth of colon cancer cells in vivo, and both SOX12 and TMED3 promote endogenous WNT-TCF signaling activity, identifying SOX12 as a positive modulator of the WNT-TCF pathway that functions as a metastatic suppressor in this context.","method":"Genome-wide in vivo shRNA screen in primary human tumor cells in mice, WNT-TCF reporter assays, spheroid formation assays","journal":"EMBO molecular medicine","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo screen plus reporter assay, single lab, but pathway placement supported by functional readouts","pmids":["24920608"],"is_preprint":false},{"year":2016,"finding":"SOX12 knockdown in AML cells decreases β-catenin expression and TCF/Wnt transcriptional activity, reduces colony formation and cell proliferation, and causes G1 cell cycle arrest, placing SOX12 upstream of the β-catenin/TCF-Wnt pathway in AML.","method":"shRNA-mediated knockdown, TCF/Wnt luciferase reporter assay, qRT-PCR, Western blot, colony assay, NOD/SCID xenograft reconstitution","journal":"British journal of haematology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reporter assay + in vivo xenograft + multiple functional readouts, single lab","pmids":["27858992"],"is_preprint":false},{"year":2017,"finding":"SOX12 directly transactivates Cyclin E and Twist1 in lung cancer cells, as demonstrated by ChIP assay; SOX12 knockdown reduces proliferation (PCNA, Cyclin E), increases apoptosis, and decreases invasion (MMP-9, Twist1, E-cadherin).","method":"ChIP assay, shRNA knockdown, Western blot, in vivo xenograft","journal":"American journal of translational research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP for direct target identification plus multiple functional readouts, single lab","pmids":["28979676"],"is_preprint":false},{"year":2019,"finding":"SOX12 promotes gastric cancer metastasis by transcriptionally activating MMP7 and IGF1 (confirmed by reporter assays). IGF1, in turn, induces SOX12 expression via the PI3K/AKT/CREB pathway, forming a positive IGF1/CREB/SOX12 feedback loop.","method":"Luciferase reporter assays, overexpression/knockdown functional assays, pathway inhibition, in vivo metastasis models","journal":"Cancer letters","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reporter assays + pathway inhibition + in vivo models, single lab","pmids":["30922917"],"is_preprint":false},{"year":2018,"finding":"Sox12 directly binds to the Foxp3 promoter and drives its transcription in CD4+ T cells, promoting the differentiation of peripherally induced regulatory T (pTreg) cells during colitis. This induction of Sox12 expression occurs downstream of TCR-NFAT signaling. Sox12 is not required for thymus-derived Treg development.","method":"Sox12 knockout and enforced expression in CD4+ T cells, adoptive transfer colitis model, promoter binding assay (ChIP/reporter), cytokine measurements","journal":"The Journal of experimental medicine","confidence":"High","confidence_rationale":"Tier 2 / Moderate — in vivo knockout model + direct promoter binding assay + enforced expression rescue, single lab with multiple orthogonal approaches","pmids":["30190287"],"is_preprint":false},{"year":2020,"finding":"Sox12 promotes degradation of GATA3 protein in Th2 cells through the proteasome pathway by enhancing Fbw7-mediated ubiquitination of GATA3, thereby suppressing Th2 cell differentiation. Fbw7 knockdown partially abrogates Sox12-mediated GATA3 suppression.","method":"Sox12 knockout and forced expression in CD4+ T cells, proteasome inhibitor assay, ubiquitination assay, Fbw7 knockdown, Western blot, in vivo allergic asthma model","journal":"Cellular & molecular immunology","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — ubiquitination assay + proteasome pathway confirmation + genetic rescue via Fbw7 knockdown + in vivo model, single lab with multiple orthogonal methods","pmids":["32152552"],"is_preprint":false},{"year":2020,"finding":"SOX12 promotes the growth of multiple myeloma cells by upregulating β-catenin expression and enhancing TCF/LEF transcriptional activity (Wnt/β-catenin pathway); transfecting a β-catenin expression vector reverses the antitumor effect of SOX12 knockdown.","method":"shRNA knockdown, β-catenin overexpression rescue, TCF/LEF luciferase reporter assay, in vivo xenograft model","journal":"Experimental cell research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reporter assay + genetic rescue + in vivo model, single lab","pmids":["31904384"],"is_preprint":false},{"year":2020,"finding":"NRSN2 (Neurensin-2) physically interacts with SOX12 in colorectal cancer cells (confirmed by co-immunoprecipitation), and NRSN2 knockdown decreases SOX12 expression while NRSN2 overexpression upregulates SOX12 expression, placing NRSN2 as an upstream regulator of SOX12.","method":"Co-immunoprecipitation, CCK8, colony formation, wound-healing, Transwell assays","journal":"Oncology letters","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single Co-IP with limited mechanistic follow-up, single lab","pmids":["33193849"],"is_preprint":false},{"year":2020,"finding":"UCHL3 (a deubiquitinating enzyme) regulates SOX12 expression through the PI3K/AKT/mTOR signaling pathway in colorectal cancer cells; UCHL3 overexpression increases SOX12 protein levels and UCHL3 knockdown decreases them.","method":"Western blot, RT-PCR, knockdown/overexpression, in vivo xenograft, pathway inhibitor studies","journal":"American journal of translational research","confidence":"Low","confidence_rationale":"Tier 3 / Weak — indirect regulation via signaling pathway, single lab, no direct biochemical interaction demonstrated for SOX12","pmids":["33194042"],"is_preprint":false},{"year":2020,"finding":"lncRNA DUXAP10 directly interacts with HuR protein (RNA-binding protein) and suppresses HuR cytoplasm-nuclear translocation, which enhances Sox12 mRNA stability in the cytoplasm and increases Sox12 expression to promote glioma cell stemness.","method":"RNA immunoprecipitation, immunofluorescence, lncRNA knockdown, Sox12 expression rescue experiments","journal":"Environmental toxicology","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — RIP + immunofluorescence for mechanistic link, single lab, moderate method quality","pmids":["33340249"],"is_preprint":false},{"year":2024,"finding":"SOX12 transcriptionally activates CCL22 (to recruit regulatory T cells via CCR4) and CD274/PD-L1 (to suppress CD8+ T cell infiltration) in HCC, promoting immunosuppression. Upstream, TGF-β1/TGFβR1-Smad2/3/4 signaling drives SOX12 overexpression. Hepatocyte-specific SOX12 knockout attenuates DEN/CCl4-induced HCC progression, while knock-in accelerates it.","method":"ChIP/transcriptional reporter assays, hepatocyte-specific knockout/knock-in mouse models (DEN/CCl4), syngeneic HCC models, Treg-specific CCR4 knockout, CCR4 inhibitor, TGFβR1 inhibitor treatment, flow cytometry","journal":"Advanced science (Weinheim, Baden-Wurttemberg, Germany)","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — in vivo genetic models (hepatocyte-specific KO and KI) + ChIP + syngeneic models + pharmacological inhibition + multiple orthogonal methods in single study","pmids":["39072947"],"is_preprint":false},{"year":2020,"finding":"SOX12 contributes to activation of the JAK2/STAT3 signaling pathway in esophageal squamous cell carcinoma; recombinant SOX12 protein restores JAK2/STAT3 activation after SOX12 knockdown, and inhibition of JAK2/STAT3 signaling mirrors SOX12 knockdown phenotype.","method":"shRNA knockdown, recombinant protein rescue, Western blot for pathway components, colony formation, Transwell assay","journal":"Oncology reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — recombinant protein rescue plus knockdown with pathway readout, single lab","pmids":["33416144"],"is_preprint":false},{"year":2021,"finding":"SOX12 directly binds the JAGGED1 promoter and upregulates JAGGED1/HES1 (Notch pathway) expression in osteosarcoma, promoting cancer stem cell-like phenotypes; JAGGED1 overexpression rescues osteosarcoma cells from the spheroidizing inhibition caused by SOX12 knockdown.","method":"Knockdown, overexpression rescue, sphere formation assay, stemness marker expression, in vivo xenograft, implied promoter binding","journal":"Stem cells international","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — functional rescue with pathway downstream target, but direct promoter binding not rigorously shown in abstract, single lab","pmids":["34725550"],"is_preprint":false},{"year":2022,"finding":"SOX12 promotes thyroid cancer cell proliferation and invasion by regulating expression of POU2F1 and POU3F1; overexpression of POU2F1 and POU3F1 reverses the effects of SOX12 knockdown. SOX12 knockdown reduces expression of PCNA, Cyclin D1, Snail, MMP-2, MMP-9 and affects E-cadherin, linking SOX12 to EMT regulation.","method":"siRNA knockdown, rescue overexpression of POU2F1/POU3F1, Western blot, CCK8, wound healing, Transwell assay, in vivo xenograft","journal":"Yonsei medical journal","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — genetic rescue experiment identifies downstream effectors, single lab","pmids":["35619584"],"is_preprint":false},{"year":2025,"finding":"SOX12 directly binds the PHGDH (3-phosphoglycerate dehydrogenase) promoter and transcriptionally activates it, enhancing the serine synthesis pathway (SSP) and metabolism to promote endometrial cancer malignant progression; serine deprivation combined with SOX12 knockdown has an enhanced inhibitory effect.","method":"Luciferase reporter assay, ChIP assay, SOX12 overexpression/knockdown, in vivo xenograft and lung metastasis models","journal":"Cellular signalling","confidence":"Medium","confidence_rationale":"Tier 1-2 / Moderate — ChIP + luciferase reporter for direct promoter binding + in vivo models, single lab","pmids":["40379232"],"is_preprint":false},{"year":2025,"finding":"SOX12 directly upregulates YBX1 expression and recruits YBX1 to the LDHA promoter, activating LDHA transcription and downstream TGF-β signaling to promote papillary thyroid carcinoma metastasis. LDHA knockdown rescues SOX12/YBX1-mediated TGF-β activation and inhibits PTC cell migration and invasion.","method":"RNA-seq, CUT&Tag, immunoprecipitation-mass spectrometry (IP-MS), LDHA knockdown rescue assay, in vitro migration/invasion assays","journal":"Cell death & disease","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — CUT&Tag + IP-MS + genetic rescue with multiple orthogonal methods in single study, single lab","pmids":["40593465"],"is_preprint":false},{"year":2025,"finding":"TRAF7 (E3 ubiquitin ligase) physically interacts with SOX12 protein and promotes its degradation via K48-linked ubiquitination through the ubiquitin-proteasome system in esophageal squamous cell carcinoma; TRAF7's tumor-suppressive effects on proliferation and migration partly depend on SOX12.","method":"Co-immunoprecipitation, ubiquitination assay (K48-linkage specificity), rescue overexpression of SOX12, Western blot, cell proliferation and migration assays","journal":"Biochemistry and cell biology = Biochimie et biologie cellulaire","confidence":"Medium","confidence_rationale":"Tier 1-2 / Moderate — Co-IP + specific ubiquitination linkage assay + genetic rescue, single lab","pmids":["40623321"],"is_preprint":false},{"year":2026,"finding":"SOX12 regulates RNF168 protein stability by transcriptionally repressing TRIP12 and UBR5 (E3 ubiquitin ligases that degrade RNF168); conversely, RNF168 interacts with and stabilizes SOX12 protein via the ubiquitin-proteasome system, forming a mutual feedback regulatory loop that promotes DNA double-strand break repair and cisplatin resistance in esophageal squamous cell carcinoma.","method":"SOX12 knockdown, Western blot (protein vs. mRNA level assessment), Co-immunoprecipitation, cisplatin sensitivity assay, DNA damage repair assay","journal":"Cell & bioscience","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP + mRNA/protein dissociation analysis for mechanism + functional rescue, single lab","pmids":["41555391"],"is_preprint":false},{"year":2024,"finding":"In colorectal cancer, EP300 promotes H3K27ac enrichment at the SOX12 promoter to epigenetically upregulate SOX12 expression; FOXN3 transcriptionally suppresses EP300 expression by binding to its promoter, thereby indirectly reducing SOX12 and inactivating Wnt/β-catenin signaling. SOX12 overexpression reverses FOXN3-mediated inhibition of CRC stemness.","method":"ChIP assay (H3K27ac at SOX12 promoter; FOXN3 at EP300 promoter), dual luciferase reporter assay, overexpression/knockdown rescue experiments, sphere-forming assay, in vivo tumor formation","journal":"Molecular carcinogenesis","confidence":"Medium","confidence_rationale":"Tier 1-2 / Moderate — ChIP for two separate promoter interactions + luciferase reporter + genetic rescue, single lab","pmids":["39607349"],"is_preprint":false},{"year":2022,"finding":"SOX12 transcriptionally activates lncRNA SNHG15 expression in cervical cancer cells (confirmed by ChIP and luciferase reporter assay), adding an upstream regulatory output of SOX12 to lncRNA-mediated cancer progression.","method":"ChIP assay, luciferase reporter assay, RNA pull-down, bioinformatics analysis, functional knockdown assays","journal":"Oxidative medicine and cellular longevity","confidence":"Medium","confidence_rationale":"Tier 1-2 / Weak — ChIP + luciferase for direct promoter activation confirmed, single lab, single study","pmids":["35069980"],"is_preprint":false},{"year":2021,"finding":"lncRNA LINC00680 physically interacts with GATA6 protein in lung adenocarcinoma cells (confirmed by RNA pulldown and western blot), weakening GATA6-mediated transcriptional suppression of the SOX12 promoter; LINC00680 depletion significantly enhances GATA6 binding to the SOX12 promoter and reduces SOX12 transcription.","method":"RNA pulldown, western blot, ChIP-qPCR, dual-luciferase assay, RNA-FISH, in vivo xenograft","journal":"Experimental cell research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — RNA pulldown + ChIP-qPCR + luciferase assay for mechanistic link, single lab","pmids":["34029572"],"is_preprint":false},{"year":2024,"finding":"In colorectal cancer (mouse models), abrogating SoxC function (including Sox12 together with Sox4 and Sox11) reduced tumor growth and prevented liver metastasis; SoxC transcription factors regulate downstream targets including Tead2, Mdk, and Klf4 during both colon development and tumorigenesis.","method":"Murine SoxC loss-of-function models (in vivo tumor growth and metastasis assays), transcriptomic comparison of embryonic and cancerous tissues","journal":"bioRxiv","confidence":"Low","confidence_rationale":"Tier 2 / Weak — preprint, in vivo loss-of-function in mouse models but findings cover SoxC as a group (Sox4/Sox11/Sox12 combined), making Sox12-specific contributions uncertain","pmids":[],"is_preprint":true}],"current_model":"SOX12 is a SoxC-group transcription factor that activates gene expression through a C-terminal transactivation domain (TAD); it directly transactivates target gene promoters (including Twist1, FGFBP1, MMP7, IGF1, GLS/GOT2/ASNS, PHGDH, CCL22, PD-L1/CD274, Cyclin E, JAGGED1, YBX1, and SNHG15) to promote cancer cell proliferation, EMT, metabolic reprogramming, and immune evasion, while its protein stability is regulated by TRAF7-mediated K48-linked ubiquitin-proteasome degradation and reciprocally stabilized by RNF168; in immune contexts, Sox12 suppresses Th2 differentiation by enhancing Fbw7-mediated ubiquitination and degradation of GATA3, and promotes peripheral Treg differentiation by directly binding and activating the Foxp3 promoter downstream of TCR-NFAT signaling."},"narrative":{"mechanistic_narrative":"SOX12 is a SoxC-group transcription factor that drives gene expression programs underlying cancer cell proliferation, epithelial-mesenchymal transition, metabolic reprogramming, and immune evasion, acting through a C-terminal 33-residue transactivation domain that confers weaker transactivation than its paralogs SOX11/SOX4 owing to a less stable alpha-helical structure, and against which the three SoxC proteins compete at target promoters [PMID:18403418]. Although Sox12-null mice develop normally because SOX4 and SOX11 functionally compensate [PMID:18505825], SOX12 becomes a potent driver in malignant contexts where it directly transactivates target promoters: Twist1 and FGFBP1 to promote HCC metastasis and EMT [PMID:25704764], MMP7 and IGF1 in gastric cancer [PMID:30922917], Cyclin E and Twist1 in lung cancer [PMID:28979676], and metabolic genes including GLS/GOT2/ASNS for asparagine synthesis [PMID:30858360] and PHGDH for serine synthesis [PMID:40379232]. In hepatocellular carcinoma, SOX12 transcriptionally activates CCL22 and CD274/PD-L1 to recruit Tregs and suppress CD8+ T-cell infiltration, with hepatocyte-specific knockout attenuating and knock-in accelerating chemically induced HCC [PMID:39072947]. SOX12 also positively modulates Wnt/β-catenin–TCF signaling in AML and multiple myeloma [PMID:27858992, PMID:31904384]. Its abundance is controlled post-translationally by opposing E3 ligase activities: TRAF7 drives K48-linked ubiquitin-proteasome degradation of SOX12 [PMID:40623321], while RNF168 stabilizes it within a mutual feedback loop linked to DNA double-strand break repair and cisplatin resistance [PMID:41555391]. In adaptive immunity, Sox12 promotes peripherally induced Treg differentiation by directly binding and activating the Foxp3 promoter downstream of TCR-NFAT signaling [PMID:30190287], and suppresses Th2 differentiation by enhancing Fbw7-mediated ubiquitination and degradation of GATA3 [PMID:32152552].","teleology":[{"year":2008,"claim":"Defined the structural basis of SOX12 transcriptional activity, establishing it as a bona fide but comparatively weak SoxC transactivator and explaining its functional ranking within the group.","evidence":"Reporter transactivation assays with domain deletion/mutagenesis and structural analysis of the TAD","pmids":["18403418"],"confidence":"High","gaps":["No endogenous target genes identified in this study","TAD interacting coactivators not defined"]},{"year":2008,"claim":"Resolved why SOX12 loss is phenotypically silent in development, showing functional redundancy with SOX4/SOX11 rather than dispensability of the SoxC program.","evidence":"Sox12 knockout mouse with phenotypic analysis and cross-comparison of SoxC expression and transactivation","pmids":["18505825"],"confidence":"High","gaps":["Does not address SOX12-specific roles unmasked in disease/cancer","Compensation mechanism at the molecular level not dissected"]},{"year":2014,"claim":"First implicated SOX12 in cancer signaling, placing it as a positive modulator of WNT-TCF, though in a context where it acted as a metastatic suppressor.","evidence":"Genome-wide in vivo shRNA screen in primary tumor cells plus WNT-TCF reporter assays","pmids":["24920608"],"confidence":"Medium","gaps":["Mechanism of WNT-TCF modulation not defined","Context-dependent suppressor vs. promoter role unresolved"]},{"year":2015,"claim":"Established SOX12 as a direct transcriptional driver of metastasis by identifying its EMT and invasion target genes and positioning it downstream of FoxQ1.","evidence":"ChIP, mutagenesis, luciferase reporters and in vivo metastasis/rescue models in HCC","pmids":["25704764"],"confidence":"High","gaps":["Cofactors at Twist1/FGFBP1 promoters unknown","Direct vs. indirect target spectrum incomplete"]},{"year":2016,"claim":"Connected SOX12 to β-catenin/TCF-Wnt control of proliferation and cell cycle progression in hematologic malignancy.","evidence":"shRNA knockdown, TCF/Wnt reporter, cell cycle and xenograft assays in AML","pmids":["27858992"],"confidence":"Medium","gaps":["Direct vs. indirect regulation of β-catenin not established","No promoter-binding evidence for Wnt components"]},{"year":2017,"claim":"Extended SOX12 direct targets to proliferation (Cyclin E) and EMT (Twist1) effectors in lung cancer.","evidence":"ChIP, shRNA knockdown, Western blot and in vivo xenograft","pmids":["28979676"],"confidence":"Medium","gaps":["Quantitative occupancy and direct binding rigor limited","Apoptosis pathway downstream of SOX12 not mapped"]},{"year":2018,"claim":"Revealed a developmental/immune function: SOX12 directly activates Foxp3 to drive peripheral Treg differentiation downstream of TCR-NFAT, distinct from thymic Treg development.","evidence":"Sox12 knockout/enforced expression in CD4+ T cells, adoptive transfer colitis, promoter binding assay","pmids":["30190287"],"confidence":"High","gaps":["NFAT-to-Sox12 induction mechanism not detailed","Foxp3 promoter cofactors unknown"]},{"year":2019,"claim":"Linked SOX12 to metabolic reprogramming and feedback signaling, showing it drives asparagine synthesis under hypoxia (HIF-1α-induced) and an IGF1/CREB/SOX12 positive loop.","evidence":"ChIP, mutagenesis, luciferase reporters, pathway inhibition and in vivo models in colorectal and gastric cancer","pmids":["30858360","30922917"],"confidence":"High","gaps":["Metabolic flux consequences quantified indirectly","Whether metabolic and metastatic outputs are coupled unclear"]},{"year":2020,"claim":"Identified SOX12 as a non-transcriptional regulator of protein turnover in immunity, enhancing Fbw7-mediated GATA3 degradation to suppress Th2 differentiation.","evidence":"Sox12 knockout/forced expression in CD4+ T cells, ubiquitination/proteasome assays, Fbw7 knockdown, in vivo asthma model","pmids":["32152552"],"confidence":"High","gaps":["How SOX12 promotes Fbw7 activity mechanistically is unresolved","Direct vs. indirect role in the ubiquitination complex unknown"]},{"year":2020,"claim":"Reinforced SOX12 as a Wnt/β-catenin promoter in additional malignancies and began mapping upstream regulators of SOX12 abundance.","evidence":"shRNA knockdown with β-catenin rescue (multiple myeloma); Co-IP, RIP and signaling-pathway studies for NRSN2, UCHL3 and DUXAP10/HuR regulation of SOX12","pmids":["31904384","33193849","33194042","33340249"],"confidence":"Medium","gaps":["NRSN2 and UCHL3 links rest on single Co-IP or indirect signaling without direct biochemistry","Distinct upstream inputs not integrated into one regulatory model"]},{"year":2021,"claim":"Expanded SOX12's oncogenic output to Notch (JAGGED1/HES1) stemness signaling and detailed lncRNA/GATA6-mediated control of SOX12 transcription.","evidence":"Knockdown/rescue sphere assays in osteosarcoma; RNA pulldown, ChIP-qPCR and luciferase for LINC00680/GATA6 regulation of the SOX12 promoter","pmids":["34725550","34029572"],"confidence":"Medium","gaps":["Direct SOX12 binding to JAGGED1 promoter not rigorously shown","Hierarchy among competing upstream regulators unclear"]},{"year":2024,"claim":"Established SOX12 as a driver of tumor immune evasion in HCC through direct activation of CCL22 and PD-L1, validated with hepatocyte-specific genetic models and downstream pharmacologic intervention.","evidence":"ChIP/reporter, hepatocyte-specific KO/KI mice, syngeneic models, CCR4/TGFβR1 inhibition, flow cytometry","pmids":["39072947"],"confidence":"High","gaps":["Whether immune-evasion targets are conserved across tumor types untested","Relative contribution of CCL22 vs PD-L1 arms not separated"]},{"year":2024,"claim":"Clarified epigenetic upstream control, showing EP300-driven H3K27ac activates the SOX12 promoter and that this is suppressed by FOXN3 via EP300, linking SOX12 to Wnt-driven CRC stemness.","evidence":"ChIP for H3K27ac and FOXN3 occupancy, luciferase, rescue and in vivo tumor assays","pmids":["39607349"],"confidence":"Medium","gaps":["Direct SOX12 transcriptional output in this context relies on prior models","FOXN3-EP300-SOX12 axis generality untested"]},{"year":2025,"claim":"Deepened SOX12's metabolic role (PHGDH/serine synthesis) and revealed a SOX12-YBX1-LDHA-TGFβ axis, while defining its protein stability via TRAF7-mediated K48 ubiquitination.","evidence":"ChIP/luciferase (PHGDH); CUT&Tag, IP-MS and LDHA rescue (YBX1/LDHA); Co-IP and K48-linkage ubiquitination assays (TRAF7); in vivo models","pmids":["40379232","40593465","40623321"],"confidence":"High","gaps":["Interplay between metabolic targets across tumor types unmapped","TRAF7 recognition determinants on SOX12 undefined"]},{"year":2026,"claim":"Identified a mutual stabilization loop with RNF168 coupling SOX12 to DNA double-strand break repair and cisplatin resistance, integrating transcriptional control of E3 ligases with reciprocal protein stabilization.","evidence":"Knockdown with mRNA/protein dissociation analysis, Co-IP, cisplatin sensitivity and DNA repair assays in ESCC","pmids":["41555391"],"confidence":"Medium","gaps":["Direct binding to TRIP12/UBR5 promoters not fully resolved","Mechanism of RNF168-mediated SOX12 stabilization undefined"]},{"year":null,"claim":"How SOX12-specific functions are selected over redundant SoxC paralogs in disease, and whether its diverse transcriptional and post-translational activities converge on a unifying biochemical mechanism, remains unresolved.","evidence":"","pmids":[],"confidence":"Low","gaps":["No structural model of SOX12 bound to a target promoter with cofactors","Cofactor/coactivator identity at most target promoters unknown","Determinants of context-dependent suppressor vs. driver behavior undefined"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[0,2,3,6,7,8,14,18,19,23]},{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[0,2,8,14,18]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[0,2,8]}],"pathway":[{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[0,2,3,14,18,19]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[2,3,14,19]},{"term_id":"R-HSA-168256","term_label":"Immune System","supporting_discovery_ids":[8,9,14]},{"term_id":"R-HSA-1430728","term_label":"Metabolism","supporting_discovery_ids":[3,18,19]},{"term_id":"R-HSA-392499","term_label":"Metabolism of proteins","supporting_discovery_ids":[9,20,21]}],"complexes":[],"partners":["TRAF7","RNF168","YBX1","NRSN2"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"O15370","full_name":"Transcription factor SOX-12","aliases":["Protein SOX-22"],"length_aa":315,"mass_kda":34.1,"function":"Transcription factor that binds to DNA at the consensus sequence 5'-ACCAAAG-3' (By similarity). Acts as a transcriptional activator (By similarity). Binds cooperatively with POU3F2/BRN2 or POU3F1/OCT6 to gene promoters, which enhances transcriptional activation (By similarity). Involved in the differentiation of naive CD4-positive T-cells into peripherally induced regulatory T (pT reg) cells under inflammatory conditions (By similarity). Binds to the promoter region of the FOXP3 gene and promotes its transcription, and might thereby contribute to pT reg cell differentiation in the spleen and lymph nodes during inflammation (By similarity). Plays a redundant role with SOX4 and SOX11 in cell survival of developing tissues such as the neural tube, branchial arches and somites, thereby contributing to organogenesis (By similarity)","subcellular_location":"Nucleus","url":"https://www.uniprot.org/uniprotkb/O15370/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/SOX12","classification":"Not Classified","n_dependent_lines":2,"n_total_lines":1208,"dependency_fraction":0.0016556291390728477},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[{"gene":"GYS1","stoichiometry":0.2},{"gene":"GYG1","stoichiometry":0.2}],"url":"https://opencell.sf.czbiohub.org/search/SOX12","total_profiled":1310},"omim":[{"mim_id":"601947","title":"SRY-BOX 12; SOX12","url":"https://www.omim.org/entry/601947"},{"mim_id":"601297","title":"SRY-BOX 15; SOX15","url":"https://www.omim.org/entry/601297"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Enhanced","locations":[{"location":"Nucleoplasm","reliability":"Enhanced"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/SOX12"},"hgnc":{"alias_symbol":[],"prev_symbol":["SOX22"]},"alphafold":{"accession":"O15370","domains":[{"cath_id":"-","chopping":"47-130_166-312","consensus_level":"medium","plddt":65.2177,"start":47,"end":312}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/O15370","model_url":"https://alphafold.ebi.ac.uk/files/AF-O15370-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-O15370-F1-predicted_aligned_error_v6.png","plddt_mean":63.0},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=SOX12","jax_strain_url":"https://www.jax.org/strain/search?query=SOX12"},"sequence":{"accession":"O15370","fasta_url":"https://rest.uniprot.org/uniprotkb/O15370.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/O15370/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/O15370"}},"corpus_meta":[{"pmid":"18403418","id":"PMC_18403418","title":"The three SoxC proteins--Sox4, Sox11 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Acidic domains and the TAD interfere with DNA binding, and the three SoxC proteins can compete with one another in reporter gene transactivation.\",\n      \"method\": \"Reporter gene transactivation assays, domain deletion and mutagenesis, structural analysis of TAD alpha-helical stability\",\n      \"journal\": \"Nucleic acids research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro reporter assays with mutagenesis and structural characterization of the TAD, single lab but multiple orthogonal methods\",\n      \"pmids\": [\"18403418\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Sox12-deficient mice develop normally and are fertile, demonstrating that Sox4 and Sox11 functionally compensate for Sox12 loss during mouse development due to overlapping expression and higher transactivation rates, but compensation is not reciprocal (Sox12 cannot replace Sox4/Sox11).\",\n      \"method\": \"Sox12 knockout mouse generation, phenotypic analysis, comparison of expression patterns and transactivation activity among SoxC members\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo knockout with defined phenotypic readout plus in vitro functional comparison, replicated observation across two independent labs (PMID 18403418 and 18505825)\",\n      \"pmids\": [\"18505825\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"SOX12 promotes HCC metastasis by directly transactivating Twist1 (inducing EMT) and FGFBP1 (promoting invasion). FoxQ1 directly binds the SOX12 promoter and transactivates SOX12 expression, placing SOX12 downstream of FoxQ1 in an HCC metastasis pathway.\",\n      \"method\": \"Serial deletion, site-directed mutagenesis, chromatin immunoprecipitation (ChIP) assays, luciferase reporter assays, overexpression/knockdown rescue experiments, in vivo metastasis models\",\n      \"journal\": \"Hepatology (Baltimore, Md.)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — ChIP + mutagenesis + luciferase reporters + in vivo rescue, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"25704764\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"SOX12 promotes colorectal cancer cell proliferation and metastasis by directly transactivating glutaminase (GLS), glutamic oxaloacetic transaminase 2 (GOT2), and asparagine synthetase (ASNS), thereby facilitating asparagine synthesis. HIF-1α directly binds the SOX12 promoter and induces SOX12 expression under hypoxic conditions.\",\n      \"method\": \"Serial deletion, site-directed mutagenesis, luciferase reporter assay, ChIP assay, overexpression/knockdown rescue experiments, in vivo xenograft models\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — ChIP + mutagenesis + luciferase + in vivo models in single lab with multiple orthogonal methods\",\n      \"pmids\": [\"30858360\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"SOX12 knockdown increases metastatic growth of colon cancer cells in vivo, and both SOX12 and TMED3 promote endogenous WNT-TCF signaling activity, identifying SOX12 as a positive modulator of the WNT-TCF pathway that functions as a metastatic suppressor in this context.\",\n      \"method\": \"Genome-wide in vivo shRNA screen in primary human tumor cells in mice, WNT-TCF reporter assays, spheroid formation assays\",\n      \"journal\": \"EMBO molecular medicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo screen plus reporter assay, single lab, but pathway placement supported by functional readouts\",\n      \"pmids\": [\"24920608\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"SOX12 knockdown in AML cells decreases β-catenin expression and TCF/Wnt transcriptional activity, reduces colony formation and cell proliferation, and causes G1 cell cycle arrest, placing SOX12 upstream of the β-catenin/TCF-Wnt pathway in AML.\",\n      \"method\": \"shRNA-mediated knockdown, TCF/Wnt luciferase reporter assay, qRT-PCR, Western blot, colony assay, NOD/SCID xenograft reconstitution\",\n      \"journal\": \"British journal of haematology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reporter assay + in vivo xenograft + multiple functional readouts, single lab\",\n      \"pmids\": [\"27858992\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"SOX12 directly transactivates Cyclin E and Twist1 in lung cancer cells, as demonstrated by ChIP assay; SOX12 knockdown reduces proliferation (PCNA, Cyclin E), increases apoptosis, and decreases invasion (MMP-9, Twist1, E-cadherin).\",\n      \"method\": \"ChIP assay, shRNA knockdown, Western blot, in vivo xenograft\",\n      \"journal\": \"American journal of translational research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP for direct target identification plus multiple functional readouts, single lab\",\n      \"pmids\": [\"28979676\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"SOX12 promotes gastric cancer metastasis by transcriptionally activating MMP7 and IGF1 (confirmed by reporter assays). IGF1, in turn, induces SOX12 expression via the PI3K/AKT/CREB pathway, forming a positive IGF1/CREB/SOX12 feedback loop.\",\n      \"method\": \"Luciferase reporter assays, overexpression/knockdown functional assays, pathway inhibition, in vivo metastasis models\",\n      \"journal\": \"Cancer letters\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reporter assays + pathway inhibition + in vivo models, single lab\",\n      \"pmids\": [\"30922917\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Sox12 directly binds to the Foxp3 promoter and drives its transcription in CD4+ T cells, promoting the differentiation of peripherally induced regulatory T (pTreg) cells during colitis. This induction of Sox12 expression occurs downstream of TCR-NFAT signaling. Sox12 is not required for thymus-derived Treg development.\",\n      \"method\": \"Sox12 knockout and enforced expression in CD4+ T cells, adoptive transfer colitis model, promoter binding assay (ChIP/reporter), cytokine measurements\",\n      \"journal\": \"The Journal of experimental medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo knockout model + direct promoter binding assay + enforced expression rescue, single lab with multiple orthogonal approaches\",\n      \"pmids\": [\"30190287\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Sox12 promotes degradation of GATA3 protein in Th2 cells through the proteasome pathway by enhancing Fbw7-mediated ubiquitination of GATA3, thereby suppressing Th2 cell differentiation. Fbw7 knockdown partially abrogates Sox12-mediated GATA3 suppression.\",\n      \"method\": \"Sox12 knockout and forced expression in CD4+ T cells, proteasome inhibitor assay, ubiquitination assay, Fbw7 knockdown, Western blot, in vivo allergic asthma model\",\n      \"journal\": \"Cellular & molecular immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — ubiquitination assay + proteasome pathway confirmation + genetic rescue via Fbw7 knockdown + in vivo model, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"32152552\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"SOX12 promotes the growth of multiple myeloma cells by upregulating β-catenin expression and enhancing TCF/LEF transcriptional activity (Wnt/β-catenin pathway); transfecting a β-catenin expression vector reverses the antitumor effect of SOX12 knockdown.\",\n      \"method\": \"shRNA knockdown, β-catenin overexpression rescue, TCF/LEF luciferase reporter assay, in vivo xenograft model\",\n      \"journal\": \"Experimental cell research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reporter assay + genetic rescue + in vivo model, single lab\",\n      \"pmids\": [\"31904384\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"NRSN2 (Neurensin-2) physically interacts with SOX12 in colorectal cancer cells (confirmed by co-immunoprecipitation), and NRSN2 knockdown decreases SOX12 expression while NRSN2 overexpression upregulates SOX12 expression, placing NRSN2 as an upstream regulator of SOX12.\",\n      \"method\": \"Co-immunoprecipitation, CCK8, colony formation, wound-healing, Transwell assays\",\n      \"journal\": \"Oncology letters\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single Co-IP with limited mechanistic follow-up, single lab\",\n      \"pmids\": [\"33193849\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"UCHL3 (a deubiquitinating enzyme) regulates SOX12 expression through the PI3K/AKT/mTOR signaling pathway in colorectal cancer cells; UCHL3 overexpression increases SOX12 protein levels and UCHL3 knockdown decreases them.\",\n      \"method\": \"Western blot, RT-PCR, knockdown/overexpression, in vivo xenograft, pathway inhibitor studies\",\n      \"journal\": \"American journal of translational research\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — indirect regulation via signaling pathway, single lab, no direct biochemical interaction demonstrated for SOX12\",\n      \"pmids\": [\"33194042\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"lncRNA DUXAP10 directly interacts with HuR protein (RNA-binding protein) and suppresses HuR cytoplasm-nuclear translocation, which enhances Sox12 mRNA stability in the cytoplasm and increases Sox12 expression to promote glioma cell stemness.\",\n      \"method\": \"RNA immunoprecipitation, immunofluorescence, lncRNA knockdown, Sox12 expression rescue experiments\",\n      \"journal\": \"Environmental toxicology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — RIP + immunofluorescence for mechanistic link, single lab, moderate method quality\",\n      \"pmids\": [\"33340249\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"SOX12 transcriptionally activates CCL22 (to recruit regulatory T cells via CCR4) and CD274/PD-L1 (to suppress CD8+ T cell infiltration) in HCC, promoting immunosuppression. Upstream, TGF-β1/TGFβR1-Smad2/3/4 signaling drives SOX12 overexpression. Hepatocyte-specific SOX12 knockout attenuates DEN/CCl4-induced HCC progression, while knock-in accelerates it.\",\n      \"method\": \"ChIP/transcriptional reporter assays, hepatocyte-specific knockout/knock-in mouse models (DEN/CCl4), syngeneic HCC models, Treg-specific CCR4 knockout, CCR4 inhibitor, TGFβR1 inhibitor treatment, flow cytometry\",\n      \"journal\": \"Advanced science (Weinheim, Baden-Wurttemberg, Germany)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — in vivo genetic models (hepatocyte-specific KO and KI) + ChIP + syngeneic models + pharmacological inhibition + multiple orthogonal methods in single study\",\n      \"pmids\": [\"39072947\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"SOX12 contributes to activation of the JAK2/STAT3 signaling pathway in esophageal squamous cell carcinoma; recombinant SOX12 protein restores JAK2/STAT3 activation after SOX12 knockdown, and inhibition of JAK2/STAT3 signaling mirrors SOX12 knockdown phenotype.\",\n      \"method\": \"shRNA knockdown, recombinant protein rescue, Western blot for pathway components, colony formation, Transwell assay\",\n      \"journal\": \"Oncology reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — recombinant protein rescue plus knockdown with pathway readout, single lab\",\n      \"pmids\": [\"33416144\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"SOX12 directly binds the JAGGED1 promoter and upregulates JAGGED1/HES1 (Notch pathway) expression in osteosarcoma, promoting cancer stem cell-like phenotypes; JAGGED1 overexpression rescues osteosarcoma cells from the spheroidizing inhibition caused by SOX12 knockdown.\",\n      \"method\": \"Knockdown, overexpression rescue, sphere formation assay, stemness marker expression, in vivo xenograft, implied promoter binding\",\n      \"journal\": \"Stem cells international\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — functional rescue with pathway downstream target, but direct promoter binding not rigorously shown in abstract, single lab\",\n      \"pmids\": [\"34725550\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"SOX12 promotes thyroid cancer cell proliferation and invasion by regulating expression of POU2F1 and POU3F1; overexpression of POU2F1 and POU3F1 reverses the effects of SOX12 knockdown. SOX12 knockdown reduces expression of PCNA, Cyclin D1, Snail, MMP-2, MMP-9 and affects E-cadherin, linking SOX12 to EMT regulation.\",\n      \"method\": \"siRNA knockdown, rescue overexpression of POU2F1/POU3F1, Western blot, CCK8, wound healing, Transwell assay, in vivo xenograft\",\n      \"journal\": \"Yonsei medical journal\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — genetic rescue experiment identifies downstream effectors, single lab\",\n      \"pmids\": [\"35619584\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"SOX12 directly binds the PHGDH (3-phosphoglycerate dehydrogenase) promoter and transcriptionally activates it, enhancing the serine synthesis pathway (SSP) and metabolism to promote endometrial cancer malignant progression; serine deprivation combined with SOX12 knockdown has an enhanced inhibitory effect.\",\n      \"method\": \"Luciferase reporter assay, ChIP assay, SOX12 overexpression/knockdown, in vivo xenograft and lung metastasis models\",\n      \"journal\": \"Cellular signalling\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — ChIP + luciferase reporter for direct promoter binding + in vivo models, single lab\",\n      \"pmids\": [\"40379232\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"SOX12 directly upregulates YBX1 expression and recruits YBX1 to the LDHA promoter, activating LDHA transcription and downstream TGF-β signaling to promote papillary thyroid carcinoma metastasis. LDHA knockdown rescues SOX12/YBX1-mediated TGF-β activation and inhibits PTC cell migration and invasion.\",\n      \"method\": \"RNA-seq, CUT&Tag, immunoprecipitation-mass spectrometry (IP-MS), LDHA knockdown rescue assay, in vitro migration/invasion assays\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — CUT&Tag + IP-MS + genetic rescue with multiple orthogonal methods in single study, single lab\",\n      \"pmids\": [\"40593465\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"TRAF7 (E3 ubiquitin ligase) physically interacts with SOX12 protein and promotes its degradation via K48-linked ubiquitination through the ubiquitin-proteasome system in esophageal squamous cell carcinoma; TRAF7's tumor-suppressive effects on proliferation and migration partly depend on SOX12.\",\n      \"method\": \"Co-immunoprecipitation, ubiquitination assay (K48-linkage specificity), rescue overexpression of SOX12, Western blot, cell proliferation and migration assays\",\n      \"journal\": \"Biochemistry and cell biology = Biochimie et biologie cellulaire\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — Co-IP + specific ubiquitination linkage assay + genetic rescue, single lab\",\n      \"pmids\": [\"40623321\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"SOX12 regulates RNF168 protein stability by transcriptionally repressing TRIP12 and UBR5 (E3 ubiquitin ligases that degrade RNF168); conversely, RNF168 interacts with and stabilizes SOX12 protein via the ubiquitin-proteasome system, forming a mutual feedback regulatory loop that promotes DNA double-strand break repair and cisplatin resistance in esophageal squamous cell carcinoma.\",\n      \"method\": \"SOX12 knockdown, Western blot (protein vs. mRNA level assessment), Co-immunoprecipitation, cisplatin sensitivity assay, DNA damage repair assay\",\n      \"journal\": \"Cell & bioscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP + mRNA/protein dissociation analysis for mechanism + functional rescue, single lab\",\n      \"pmids\": [\"41555391\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"In colorectal cancer, EP300 promotes H3K27ac enrichment at the SOX12 promoter to epigenetically upregulate SOX12 expression; FOXN3 transcriptionally suppresses EP300 expression by binding to its promoter, thereby indirectly reducing SOX12 and inactivating Wnt/β-catenin signaling. SOX12 overexpression reverses FOXN3-mediated inhibition of CRC stemness.\",\n      \"method\": \"ChIP assay (H3K27ac at SOX12 promoter; FOXN3 at EP300 promoter), dual luciferase reporter assay, overexpression/knockdown rescue experiments, sphere-forming assay, in vivo tumor formation\",\n      \"journal\": \"Molecular carcinogenesis\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — ChIP for two separate promoter interactions + luciferase reporter + genetic rescue, single lab\",\n      \"pmids\": [\"39607349\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"SOX12 transcriptionally activates lncRNA SNHG15 expression in cervical cancer cells (confirmed by ChIP and luciferase reporter assay), adding an upstream regulatory output of SOX12 to lncRNA-mediated cancer progression.\",\n      \"method\": \"ChIP assay, luciferase reporter assay, RNA pull-down, bioinformatics analysis, functional knockdown assays\",\n      \"journal\": \"Oxidative medicine and cellular longevity\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1-2 / Weak — ChIP + luciferase for direct promoter activation confirmed, single lab, single study\",\n      \"pmids\": [\"35069980\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"lncRNA LINC00680 physically interacts with GATA6 protein in lung adenocarcinoma cells (confirmed by RNA pulldown and western blot), weakening GATA6-mediated transcriptional suppression of the SOX12 promoter; LINC00680 depletion significantly enhances GATA6 binding to the SOX12 promoter and reduces SOX12 transcription.\",\n      \"method\": \"RNA pulldown, western blot, ChIP-qPCR, dual-luciferase assay, RNA-FISH, in vivo xenograft\",\n      \"journal\": \"Experimental cell research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — RNA pulldown + ChIP-qPCR + luciferase assay for mechanistic link, single lab\",\n      \"pmids\": [\"34029572\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"In colorectal cancer (mouse models), abrogating SoxC function (including Sox12 together with Sox4 and Sox11) reduced tumor growth and prevented liver metastasis; SoxC transcription factors regulate downstream targets including Tead2, Mdk, and Klf4 during both colon development and tumorigenesis.\",\n      \"method\": \"Murine SoxC loss-of-function models (in vivo tumor growth and metastasis assays), transcriptomic comparison of embryonic and cancerous tissues\",\n      \"journal\": \"bioRxiv\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 2 / Weak — preprint, in vivo loss-of-function in mouse models but findings cover SoxC as a group (Sox4/Sox11/Sox12 combined), making Sox12-specific contributions uncertain\",\n      \"pmids\": [],\n      \"is_preprint\": true\n    }\n  ],\n  \"current_model\": \"SOX12 is a SoxC-group transcription factor that activates gene expression through a C-terminal transactivation domain (TAD); it directly transactivates target gene promoters (including Twist1, FGFBP1, MMP7, IGF1, GLS/GOT2/ASNS, PHGDH, CCL22, PD-L1/CD274, Cyclin E, JAGGED1, YBX1, and SNHG15) to promote cancer cell proliferation, EMT, metabolic reprogramming, and immune evasion, while its protein stability is regulated by TRAF7-mediated K48-linked ubiquitin-proteasome degradation and reciprocally stabilized by RNF168; in immune contexts, Sox12 suppresses Th2 differentiation by enhancing Fbw7-mediated ubiquitination and degradation of GATA3, and promotes peripheral Treg differentiation by directly binding and activating the Foxp3 promoter downstream of TCR-NFAT signaling.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"SOX12 is a SoxC-group transcription factor that drives gene expression programs underlying cancer cell proliferation, epithelial-mesenchymal transition, metabolic reprogramming, and immune evasion, acting through a C-terminal 33-residue transactivation domain that confers weaker transactivation than its paralogs SOX11/SOX4 owing to a less stable alpha-helical structure, and against which the three SoxC proteins compete at target promoters [#0]. Although Sox12-null mice develop normally because SOX4 and SOX11 functionally compensate [#1], SOX12 becomes a potent driver in malignant contexts where it directly transactivates target promoters: Twist1 and FGFBP1 to promote HCC metastasis and EMT [#2], MMP7 and IGF1 in gastric cancer [#7], Cyclin E and Twist1 in lung cancer [#6], and metabolic genes including GLS/GOT2/ASNS for asparagine synthesis [#3] and PHGDH for serine synthesis [#18]. In hepatocellular carcinoma, SOX12 transcriptionally activates CCL22 and CD274/PD-L1 to recruit Tregs and suppress CD8+ T-cell infiltration, with hepatocyte-specific knockout attenuating and knock-in accelerating chemically induced HCC [#14]. SOX12 also positively modulates Wnt/\\u03b2-catenin\\u2013TCF signaling in AML and multiple myeloma [#5, #10]. Its abundance is controlled post-translationally by opposing E3 ligase activities: TRAF7 drives K48-linked ubiquitin-proteasome degradation of SOX12 [#20], while RNF168 stabilizes it within a mutual feedback loop linked to DNA double-strand break repair and cisplatin resistance [#21]. In adaptive immunity, Sox12 promotes peripherally induced Treg differentiation by directly binding and activating the Foxp3 promoter downstream of TCR-NFAT signaling [#8], and suppresses Th2 differentiation by enhancing Fbw7-mediated ubiquitination and degradation of GATA3 [#9].\",\n  \"teleology\": [\n    {\n      \"year\": 2008,\n      \"claim\": \"Defined the structural basis of SOX12 transcriptional activity, establishing it as a bona fide but comparatively weak SoxC transactivator and explaining its functional ranking within the group.\",\n      \"evidence\": \"Reporter transactivation assays with domain deletion/mutagenesis and structural analysis of the TAD\",\n      \"pmids\": [\"18403418\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"No endogenous target genes identified in this study\", \"TAD interacting coactivators not defined\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Resolved why SOX12 loss is phenotypically silent in development, showing functional redundancy with SOX4/SOX11 rather than dispensability of the SoxC program.\",\n      \"evidence\": \"Sox12 knockout mouse with phenotypic analysis and cross-comparison of SoxC expression and transactivation\",\n      \"pmids\": [\"18505825\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Does not address SOX12-specific roles unmasked in disease/cancer\", \"Compensation mechanism at the molecular level not dissected\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"First implicated SOX12 in cancer signaling, placing it as a positive modulator of WNT-TCF, though in a context where it acted as a metastatic suppressor.\",\n      \"evidence\": \"Genome-wide in vivo shRNA screen in primary tumor cells plus WNT-TCF reporter assays\",\n      \"pmids\": [\"24920608\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanism of WNT-TCF modulation not defined\", \"Context-dependent suppressor vs. promoter role unresolved\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Established SOX12 as a direct transcriptional driver of metastasis by identifying its EMT and invasion target genes and positioning it downstream of FoxQ1.\",\n      \"evidence\": \"ChIP, mutagenesis, luciferase reporters and in vivo metastasis/rescue models in HCC\",\n      \"pmids\": [\"25704764\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Cofactors at Twist1/FGFBP1 promoters unknown\", \"Direct vs. indirect target spectrum incomplete\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Connected SOX12 to \\u03b2-catenin/TCF-Wnt control of proliferation and cell cycle progression in hematologic malignancy.\",\n      \"evidence\": \"shRNA knockdown, TCF/Wnt reporter, cell cycle and xenograft assays in AML\",\n      \"pmids\": [\"27858992\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct vs. indirect regulation of \\u03b2-catenin not established\", \"No promoter-binding evidence for Wnt components\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Extended SOX12 direct targets to proliferation (Cyclin E) and EMT (Twist1) effectors in lung cancer.\",\n      \"evidence\": \"ChIP, shRNA knockdown, Western blot and in vivo xenograft\",\n      \"pmids\": [\"28979676\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Quantitative occupancy and direct binding rigor limited\", \"Apoptosis pathway downstream of SOX12 not mapped\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Revealed a developmental/immune function: SOX12 directly activates Foxp3 to drive peripheral Treg differentiation downstream of TCR-NFAT, distinct from thymic Treg development.\",\n      \"evidence\": \"Sox12 knockout/enforced expression in CD4+ T cells, adoptive transfer colitis, promoter binding assay\",\n      \"pmids\": [\"30190287\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"NFAT-to-Sox12 induction mechanism not detailed\", \"Foxp3 promoter cofactors unknown\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Linked SOX12 to metabolic reprogramming and feedback signaling, showing it drives asparagine synthesis under hypoxia (HIF-1\\u03b1-induced) and an IGF1/CREB/SOX12 positive loop.\",\n      \"evidence\": \"ChIP, mutagenesis, luciferase reporters, pathway inhibition and in vivo models in colorectal and gastric cancer\",\n      \"pmids\": [\"30858360\", \"30922917\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Metabolic flux consequences quantified indirectly\", \"Whether metabolic and metastatic outputs are coupled unclear\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Identified SOX12 as a non-transcriptional regulator of protein turnover in immunity, enhancing Fbw7-mediated GATA3 degradation to suppress Th2 differentiation.\",\n      \"evidence\": \"Sox12 knockout/forced expression in CD4+ T cells, ubiquitination/proteasome assays, Fbw7 knockdown, in vivo asthma model\",\n      \"pmids\": [\"32152552\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How SOX12 promotes Fbw7 activity mechanistically is unresolved\", \"Direct vs. indirect role in the ubiquitination complex unknown\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Reinforced SOX12 as a Wnt/\\u03b2-catenin promoter in additional malignancies and began mapping upstream regulators of SOX12 abundance.\",\n      \"evidence\": \"shRNA knockdown with \\u03b2-catenin rescue (multiple myeloma); Co-IP, RIP and signaling-pathway studies for NRSN2, UCHL3 and DUXAP10/HuR regulation of SOX12\",\n      \"pmids\": [\"31904384\", \"33193849\", \"33194042\", \"33340249\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"NRSN2 and UCHL3 links rest on single Co-IP or indirect signaling without direct biochemistry\", \"Distinct upstream inputs not integrated into one regulatory model\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Expanded SOX12's oncogenic output to Notch (JAGGED1/HES1) stemness signaling and detailed lncRNA/GATA6-mediated control of SOX12 transcription.\",\n      \"evidence\": \"Knockdown/rescue sphere assays in osteosarcoma; RNA pulldown, ChIP-qPCR and luciferase for LINC00680/GATA6 regulation of the SOX12 promoter\",\n      \"pmids\": [\"34725550\", \"34029572\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct SOX12 binding to JAGGED1 promoter not rigorously shown\", \"Hierarchy among competing upstream regulators unclear\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Established SOX12 as a driver of tumor immune evasion in HCC through direct activation of CCL22 and PD-L1, validated with hepatocyte-specific genetic models and downstream pharmacologic intervention.\",\n      \"evidence\": \"ChIP/reporter, hepatocyte-specific KO/KI mice, syngeneic models, CCR4/TGF\\u03b2R1 inhibition, flow cytometry\",\n      \"pmids\": [\"39072947\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether immune-evasion targets are conserved across tumor types untested\", \"Relative contribution of CCL22 vs PD-L1 arms not separated\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Clarified epigenetic upstream control, showing EP300-driven H3K27ac activates the SOX12 promoter and that this is suppressed by FOXN3 via EP300, linking SOX12 to Wnt-driven CRC stemness.\",\n      \"evidence\": \"ChIP for H3K27ac and FOXN3 occupancy, luciferase, rescue and in vivo tumor assays\",\n      \"pmids\": [\"39607349\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct SOX12 transcriptional output in this context relies on prior models\", \"FOXN3-EP300-SOX12 axis generality untested\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Deepened SOX12's metabolic role (PHGDH/serine synthesis) and revealed a SOX12-YBX1-LDHA-TGF\\u03b2 axis, while defining its protein stability via TRAF7-mediated K48 ubiquitination.\",\n      \"evidence\": \"ChIP/luciferase (PHGDH); CUT&Tag, IP-MS and LDHA rescue (YBX1/LDHA); Co-IP and K48-linkage ubiquitination assays (TRAF7); in vivo models\",\n      \"pmids\": [\"40379232\", \"40593465\", \"40623321\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Interplay between metabolic targets across tumor types unmapped\", \"TRAF7 recognition determinants on SOX12 undefined\"]\n    },\n    {\n      \"year\": 2026,\n      \"claim\": \"Identified a mutual stabilization loop with RNF168 coupling SOX12 to DNA double-strand break repair and cisplatin resistance, integrating transcriptional control of E3 ligases with reciprocal protein stabilization.\",\n      \"evidence\": \"Knockdown with mRNA/protein dissociation analysis, Co-IP, cisplatin sensitivity and DNA repair assays in ESCC\",\n      \"pmids\": [\"41555391\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct binding to TRIP12/UBR5 promoters not fully resolved\", \"Mechanism of RNF168-mediated SOX12 stabilization undefined\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How SOX12-specific functions are selected over redundant SoxC paralogs in disease, and whether its diverse transcriptional and post-translational activities converge on a unifying biochemical mechanism, remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No structural model of SOX12 bound to a target promoter with cofactors\", \"Cofactor/coactivator identity at most target promoters unknown\", \"Determinants of context-dependent suppressor vs. driver behavior undefined\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [0, 2, 3, 6, 7, 8, 14, 18, 19, 23]},\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [0, 2, 8, 14, 18]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [0, 2, 8]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [0, 2, 3, 14, 18, 19]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [2, 3, 14, 19]},\n      {\"term_id\": \"R-HSA-168256\", \"supporting_discovery_ids\": [8, 9, 14]},\n      {\"term_id\": \"R-HSA-1430728\", \"supporting_discovery_ids\": [3, 18, 19]},\n      {\"term_id\": \"R-HSA-392499\", \"supporting_discovery_ids\": [9, 20, 21]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"TRAF7\", \"RNF168\", \"YBX1\", \"NRSN2\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":6,"faith_total":6,"faith_pct":100.0}}