{"gene":"COL10A1","run_date":"2026-04-28T17:28:53","timeline":{"discoveries":[{"year":2011,"finding":"Runx2 directly interacts with two tandem-repeat Runx2 binding sites (TGTGGG-TGTGGC) within the 150-bp Col10a1 distal cis-enhancer, and this interaction is required but not sufficient for hypertrophic chondrocyte-specific Col10a1 expression in vivo; mutating these Runx2 sites abolishes cell-specific reporter expression in transgenic mice.","method":"EMSA, ChIP, transfection reporter assays, transgenic mice with Runx2-site mutations","journal":"Journal of bone and mineral research","confidence":"High","confidence_rationale":"Tier 1-2 — multiple orthogonal methods (EMSA, ChIP, in vivo transgenic mutagenesis) in single study with rigorous controls","pmids":["21887706"],"is_preprint":false},{"year":2014,"finding":"Multiple transcription factors interact with the 150-bp Col10a1 cis-enhancer, including AP1, MEF2, NFAT, Runx1, TBX5, Cox-1, and Cox-2; Cox-2 was confirmed to directly interact with this enhancer by EMSA and ChIP, supporting a Cox-2-containing, Runx2-centered Col10a1 regulatory complex in hypertrophic chondrocytes.","method":"In silico sequence analysis, yeast one-hybrid, mass spectrometry, EMSA, ChIP","journal":"Cell death & disease","confidence":"Medium","confidence_rationale":"Tier 2 — multiple orthogonal methods (yeast one-hybrid, MS, EMSA, ChIP) in single study","pmids":["25321476"],"is_preprint":false},{"year":2010,"finding":"GADD45β enhances Col10a1 transcription via the MTK1/MKK3/6/p38 signaling axis, acting through the transactivation domain TAD4 of C/EBPβ bound to the proximal Col10a1 promoter; dominant-negative p38 (but not JNK) disrupts GADD45β/C/EBPβ-mediated Col10a1 transactivation.","method":"Promoter reporter assay, dominant-negative kinase constructs, ChIP, siRNA knockdown, kinase pathway analysis","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1-2 — multiple orthogonal methods including reporter assay, ChIP, dominant-negative constructs, and in vivo genetic data (Gadd45β-/- mice)","pmids":["20048163"],"is_preprint":false},{"year":2008,"finding":"COL10A1 expression during MSC chondrogenesis correlates with demethylation of two specific CpG sites in the COL10A1 promoter; in human articular chondrocytes (which do not express COL10A1), these sites are consistently methylated, indicating methylation-based epigenetic silencing.","method":"Combined Bisulfite Restriction Analysis (COBRA), bisulfite sequencing, qPCR for expression","journal":"Arthritis and rheumatism","confidence":"Medium","confidence_rationale":"Tier 2 — direct bisulfite sequencing of specific CpG sites correlated with expression in multiple cell types, single lab","pmids":["18759285"],"is_preprint":false},{"year":2007,"finding":"COL10A1 nonsense and frameshift mutations produce misfolded truncated α1(X) chains that are retained in the ER of hypertrophic chondrocytes, activate the unfolded protein response (UPR), and exert a dominant-negative effect by interfering with trimerization of wild-type α1(X) chains, disrupting chondrocyte differentiation in the growth plate.","method":"In vitro translation/assembly assay, transgenic mouse model (FCdel), ER retention immunostaining, UPR marker analysis","journal":"Human molecular genetics","confidence":"High","confidence_rationale":"Tier 1-2 — in vitro reconstitution of trimerization, transgenic mouse model with dosage-dependent phenotype, multiple orthogonal methods","pmids":["17403716"],"is_preprint":false},{"year":2004,"finding":"MCDS-associated NC1 domain missense mutations (Y582D, Y598D, Q653P) in COL10A1 disrupt collagen X trimerization in vitro; wild-type collagen X assembles into SDS-stable trimers, whereas these mutant chains fail to trimerize, suggesting impaired NC1-mediated trimer assembly as the common pathogenic mechanism.","method":"In vitro coupled transcription/translation and SDS-PAGE trimer assembly assay","journal":"Human mutation","confidence":"High","confidence_rationale":"Tier 1 — in vitro reconstitution of trimerization with engineered mutant cDNAs, replicated across multiple mutation studies","pmids":["15024737"],"is_preprint":false},{"year":2005,"finding":"COL10A1 missense mutations disrupt collagen X trimerization and secretion (examined by in vitro expression and cell transfection), while nonsense mutations lead to complete removal of mutant mRNA by nonsense-mediated mRNA decay (NMD), resulting in functional haploinsufficiency as the common mechanism for MCDS.","method":"In vitro expression and assembly assays, cell transfection, analysis of mutant mRNA stability in patient cartilage tissue","journal":"Human mutation","confidence":"High","confidence_rationale":"Tier 1-2 — reconstitution assembly assay combined with patient tissue mRNA analysis; findings independently replicated across labs","pmids":["15880705"],"is_preprint":false},{"year":2010,"finding":"A COL10A1 frameshift mutant protein (p.G579fsX611) fails to trimerize and exerts a dominant-negative effect on wild-type α1(X) chain trimerization: trimerization of wild-type chains was significantly reduced (from 57% to 33%) when co-translated with mutant chains in a 1:1 ratio.","method":"In vitro coupled transcription/translation trimerization assembly assay","journal":"Journal of orthopaedic research","confidence":"High","confidence_rationale":"Tier 1 — quantitative in vitro reconstitution assay with wild-type and mutant chains","pmids":["20872587"],"is_preprint":false},{"year":2018,"finding":"In a mouse model of MCDS (Col10a1 p.Y632X), the mutant protein is translated and retained intracellularly triggering ER stress and UPR; treatment with carbamazepine (which stimulates intracellular proteolysis) reduced ER stress, restored growth plate architecture, increased bone growth, and corrected hip distortion.","method":"Gene-targeted knock-in mouse model, ER stress/UPR marker analysis, carbamazepine pharmacological rescue","journal":"Human molecular genetics","confidence":"High","confidence_rationale":"Tier 2 — in vivo genetic model with pharmacological rescue and quantitative phenotypic readouts","pmids":["30010889"],"is_preprint":false},{"year":2018,"finding":"SOX9 directly binds to the COL10A1 gene promoter and activates its transcription; TGF-β1 treatment increases Smad2 phosphorylation, upregulates SOX9, which in turn increases COL10A1 expression; COL10A1 promotes EMT and metastasis in gastric cancer cells, and SOX9 is required for COL10A1-mediated EMT and invasiveness.","method":"EMSA, ChIP assay, promoter reporter assay, siRNA knockdown, nude mouse metastasis model","journal":"Cell death & disease","confidence":"High","confidence_rationale":"Tier 1-2 — EMSA, ChIP, and promoter reporter assays plus in vivo functional validation with multiple orthogonal methods","pmids":["30154451"],"is_preprint":false},{"year":2020,"finding":"COL10A1 interacts with DDR2 (discoidin domain receptor 2) and activates the downstream FAK signaling pathway to regulate lung adenocarcinoma cell proliferation and invasion; knockdown or overexpression of COL10A1 modulates DDR2 and FAK activity.","method":"Co-immunoprecipitation, gain- and loss-of-function experiments, FAK signaling analysis, in vitro and in vivo functional assays","journal":"Frontiers in oncology","confidence":"Medium","confidence_rationale":"Tier 2-3 — Co-IP interaction plus functional rescue, single lab","pmids":["33324550"],"is_preprint":false},{"year":2022,"finding":"COL10A1 activates the MEK/ERK signaling pathway by binding to DDR2 in pancreatic cancer cells, leading to EMT and accelerated cancer progression; COL10A1 overexpression enhanced proliferation and migration, and DDR2 expression was regulated by COL10A1.","method":"Overexpression/knockdown functional assays, MEK/ERK signaling analysis, EMT marker assessment","journal":"Frontiers in oncology","confidence":"Medium","confidence_rationale":"Tier 3 — functional signaling pathway analysis in cancer cell lines, single lab, no direct binding reconstitution","pmids":["36530986"],"is_preprint":false},{"year":2022,"finding":"METTL3-mediated m6A methylation of COL10A1 mRNA in cancer-associated fibroblasts (CAFs) stabilizes COL10A1 mRNA and increases its expression; COL10A1 secreted by CAFs promotes lung squamous cell carcinoma (LUSC) cell proliferation and suppresses apoptosis-induced oxidative stress.","method":"MeRIP (m6A sequencing), METTL3 knockdown, COL10A1 knockdown, in vitro functional assays, in vivo xenograft","journal":"Oxidative medicine and cellular longevity","confidence":"Medium","confidence_rationale":"Tier 2 — MeRIP for direct m6A detection plus functional rescue experiments, single lab","pmids":["36246404"],"is_preprint":false},{"year":2021,"finding":"COL10A1 directly interacts with P4HB (Prolyl 4-hydroxylase beta polypeptide) in breast cancer cells; knockdown of P4HB reverses the proliferation- and invasion-promoting effects of COL10A1 overexpression, placing COL10A1 upstream of P4HB in breast cancer progression.","method":"Co-immunoprecipitation, siRNA knockdown, CCK-8, wound healing, transwell assays","journal":"Medical science monitor","confidence":"Low","confidence_rationale":"Tier 3 — single Co-IP plus functional rescue, single lab","pmids":["33637669"],"is_preprint":false},{"year":2024,"finding":"miR-26b-5p from M2 macrophage-derived exosomes directly targets COL10A1 (confirmed by target-site mutation and dual-luciferase reporter assay), inhibiting chondrocyte hypertrophy induced by M1 macrophage-conditioned medium.","method":"Dual-luciferase reporter assay with target-site mutation, miRNA mimic transfection, in vitro chondrocyte hypertrophy assay, in vivo OA mouse model","journal":"Journal of nanobiotechnology","confidence":"Medium","confidence_rationale":"Tier 2 — direct target validation by luciferase reporter with site mutation, plus functional in vitro and in vivo assays","pmids":["38374072"],"is_preprint":false},{"year":2020,"finding":"miR-26a-5p directly targets COL10A1 (validated by dual-luciferase reporter assay), and rescue experiments show that downregulation of COL10A1 reverses the inhibitory effect of miR-26a-5p overexpression on gastric cancer cell proliferation, migration, and invasion.","method":"Dual-luciferase reporter assay, siRNA knockdown, CCK-8, colony formation, transwell assays","journal":"European review for medical and pharmacological sciences","confidence":"Medium","confidence_rationale":"Tier 2-3 — luciferase target validation plus rescue experiment, single lab","pmids":["32096148"],"is_preprint":false},{"year":2023,"finding":"DLX5 promotes Col10a1 expression in hypertrophic chondrocytes by directly interacting with the Col10a1 cis-enhancer, as demonstrated by dual-luciferase reporter and ChIP assays; DLX5 may cooperate with RUNX2 via adjacent binding sites within the enhancer.","method":"qRT-PCR, Western blot, dual-luciferase reporter assay, ChIP, forced expression and knockdown in chondrogenic cell models, murine OA model","journal":"Genes & diseases","confidence":"Medium","confidence_rationale":"Tier 2 — ChIP and reporter assay with direct binding evidence, single lab","pmids":["37492739"],"is_preprint":false},{"year":2021,"finding":"miR-218 directly targets COL10A1, MEF2C, and RUNX2 (confirmed by miR reporter assay in HEK293T and miR pulldown in human MSC); gain of miR-218 in human MSC attenuates hypertrophic markers including COL10A1, though WNT/β-catenin activation counteracts anti-hypertrophic effects.","method":"miRNA reporter assay, miR pulldown, western blot, functional differentiation assays in MSC and SaOS-2 cells","journal":"Stem cell research & therapy","confidence":"Medium","confidence_rationale":"Tier 2 — direct target validation by reporter assay and pulldown, plus functional assays, single lab","pmids":["33303006"],"is_preprint":false},{"year":2013,"finding":"Downregulation of carbonic anhydrase IX (Car9) in mouse primary chondrocytes induces Col10a1 expression in a HIF-2α-independent manner; this induction is modulated by the cAMP/PKA pathway, as it is augmented by a PKA inhibitor and suppressed by a phosphodiesterase inhibitor or cAMP analog.","method":"Car9 siRNA knockdown, Car9 forced expression, Epas1 siRNA (HIF-2α), pharmacological cAMP/PKA pathway manipulation, RT-PCR","journal":"PloS one","confidence":"Medium","confidence_rationale":"Tier 2 — multiple siRNA and pharmacological interventions in primary chondrocytes, single lab","pmids":["23441228"],"is_preprint":false},{"year":2021,"finding":"TBX5 acts as a negative regulator of Col10a1: overexpression of Tbx5 decreases Col10a1 expression while knockdown increases it; in ColX-Tbx5 transgenic mice, Tbx5 overexpression decreased Col10a1 expression in limb tissue and caused mildly delayed ossification.","method":"qRT-PCR, Western blot, stable overexpression cell line, transgenic mouse generation, alkaline phosphatase staining","journal":"Frontiers in genetics","confidence":"Medium","confidence_rationale":"Tier 2 — in vitro and in vivo transgenic validation, single lab","pmids":["34276786"],"is_preprint":false},{"year":2024,"finding":"DDX5 (DEAD-box helicase 5) acts as a positive transcriptional regulator of Col10a1 by directly interacting with the 150-bp Col10a1 cis-enhancer, as confirmed by ChIP and dual-luciferase reporter assay; Ddx5 knockdown reduces COL10A1 expression and impairs chondrocyte maturation (weaker alcian blue and ALP staining), and may cooperate with RUNX2.","method":"qRT-PCR, Western blot, dual-luciferase reporter assay, ChIP, stable Ddx5 knockdown ATDC5 cells, alcian blue/ALP/alizarin red staining","journal":"American journal of translational research","confidence":"Medium","confidence_rationale":"Tier 2 — ChIP and reporter assay confirm direct binding, functional differentiation assays, single lab","pmids":["38715834"],"is_preprint":false},{"year":2025,"finding":"A COL10A1 p.W651fsX666 frameshift mutation produces mutant mRNA that undergoes NMD, yet the mutant protein also disrupts trimerization of normal collagen X in vitro (dominant-negative effect), demonstrating that both haploinsufficiency and dominant-negative mechanisms can co-exist for a single nonsense/frameshift mutation.","method":"In vitro trimerization analysis, mRNA stability assay, Sanger sequencing, family segregation analysis","journal":"Human molecular genetics","confidence":"Medium","confidence_rationale":"Tier 1-2 — in vitro trimerization reconstitution with quantitative analysis, single lab","pmids":["40398448"],"is_preprint":false},{"year":2024,"finding":"KLF4 induces miR-101 transcription, and miR-101 in turn downregulates COL10A1 expression (dual-luciferase reporter validation); COL10A1 silencing inhibits EMT and renal fibrosis in ischemia-reperfusion injury models, placing COL10A1 downstream of KLF4/miR-101 axis.","method":"Dual-luciferase reporter assay, FISH, KLF4 overexpression, COL10A1 siRNA, ischemia-reperfusion mouse model, immunofluorescence","journal":"Renal failure","confidence":"Medium","confidence_rationale":"Tier 2-3 — luciferase validation plus in vivo mouse model, single lab","pmids":["38345033"],"is_preprint":false},{"year":2025,"finding":"COL10A1 directly interacts with INHBA and facilitates PI3K/AKT phosphorylation in prostate cancer cells; co-immunoprecipitation confirmed the COL10A1-INHBA interaction, and overexpression of COL10A1 promotes cancer cell proliferation, migration, and invasion through this axis.","method":"Co-immunoprecipitation, CCK-8, colony formation, flow cytometry, transwell, wound-healing assays, rescue experiments","journal":"Journal of cellular and molecular medicine","confidence":"Low","confidence_rationale":"Tier 3 — single Co-IP for interaction, signaling pathway inferred from phosphorylation changes, single lab","pmids":["39656597"],"is_preprint":false},{"year":2023,"finding":"COL10A1 knockdown in pancreatic adenocarcinoma cells decreases CD276 expression, and overexpression of CD276 reverses COL10A1 knockdown-induced repression of proliferation and migration, identifying CD276 as a downstream effector of COL10A1 in pancreatic cancer.","method":"siRNA knockdown, CCK-8, wound healing, transwell assays, western blot for CD276","journal":"BMC gastroenterology","confidence":"Low","confidence_rationale":"Tier 3 — downstream target identified by rescue experiment without direct binding evidence, single lab","pmids":["37974070"],"is_preprint":false},{"year":2021,"finding":"COL10A1 knockdown in HRMECs suppresses proliferation and tube formation under hypoxic conditions, and downregulates SNAIL1 and ANGPT2; intravitreal injection of anti-collagen X monoclonal antibody significantly reduces CNV leakage and lesion area in a mouse laser-induced CNV model.","method":"siRNA knockdown, proliferation and tube formation assays, anti-collagen X antibody injection in vivo, fundus fluorescein angiography, immunofluorescence","journal":"Microvascular research","confidence":"Medium","confidence_rationale":"Tier 2 — in vitro functional assays plus in vivo antibody-mediated loss-of-function, single lab","pmids":["34520774"],"is_preprint":false},{"year":2025,"finding":"COL10A1 promotes colorectal cancer cell EMT and induces M2 macrophage polarization through the COL10A1/CD18/JAK1/STAT3 signaling axis; M2 macrophages in turn enhance COL10A1 expression in fibroblasts via TGF-β/RUNX2 pathway, forming a pro-tumorigenic feedback loop.","method":"Multi-omics integration (single-cell, bulk, spatial transcriptomics, proteomics), in vivo models, molecular pathway assays, drug screening","journal":"Journal of experimental & clinical cancer research","confidence":"Medium","confidence_rationale":"Tier 2 — multi-omics plus functional validation in vivo and in vitro, single lab","pmids":["40826474"],"is_preprint":false},{"year":1993,"finding":"The mouse Col10a1 gene has three exons and two introns spanning 7.0 kb, with alternative promoter usage and multiple transcription start sites; mRNA (~3.0 kb) is first expressed at E13.5, and in situ hybridization confirms restriction of Col10a1 expression to hypertrophic chondrocytes in growth cartilage.","method":"RNase protection assays, primer extension, RACE-PCR, in situ hybridization, RT-PCR, SDS-PAGE","journal":"European journal of biochemistry","confidence":"High","confidence_rationale":"Tier 1-2 — multiple direct molecular methods establishing gene structure and tissue-specific expression; foundational paper","pmids":["8477738"],"is_preprint":false},{"year":1991,"finding":"The human COL10A1 gene (encoding α1(X) collagen) was cloned and mapped to the q21-q22 region of chromosome 6 by in situ hybridization and somatic cell hybrid analysis.","method":"PCR with consensus primers, in situ hybridization of metaphase chromosomes, Southern analysis of human-hamster somatic cell hybrids","journal":"FEBS letters","confidence":"High","confidence_rationale":"Tier 1-2 — direct chromosomal mapping by two independent methods; foundational localization paper","pmids":["2037056"],"is_preprint":false}],"current_model":"COL10A1 encodes the α1 chain of type X collagen, a homotrimeric short-chain collagen specifically produced by hypertrophic chondrocytes during endochondral ossification; its NC1 C-terminal domain mediates trimerization, and disease-causing mutations (MCDS/SMD) disrupt trimerization and/or trigger ER stress and UPR via misfolded protein retention, while transcription is controlled by a 150-bp cis-enhancer bound by Runx2 (required but not sufficient), cooperating factors (DLX5, DDX5, C/EBPβ via GADD45β/p38), and repressors (TBX5, miR-218, CpG methylation); in cancer contexts, COL10A1 signals through DDR2/FAK and DDR2/MEK/ERK axes to drive EMT, proliferation, and metastasis."},"narrative":{"teleology":[{"year":1991,"claim":"Establishing the genomic identity and chromosomal location of COL10A1 was a prerequisite for subsequent mutation and regulatory studies.","evidence":"PCR cloning, in situ hybridization, and somatic cell hybrid analysis mapped COL10A1 to human chromosome 6q21-q22","pmids":["2037056"],"confidence":"High","gaps":["Exon-intron structure of the human gene was not determined in this study","No functional data on protein product"]},{"year":1993,"claim":"Defining the gene structure and proving hypertrophic chondrocyte-restricted expression established COL10A1 as the definitive marker of chondrocyte hypertrophy during endochondral ossification.","evidence":"RNase protection, primer extension, RACE-PCR, and in situ hybridization in mouse embryos showed three-exon gene structure and expression restricted to hypertrophic cartilage from E13.5","pmids":["8477738"],"confidence":"High","gaps":["Cis-regulatory elements controlling tissue specificity were not identified","No protein-level functional characterization"]},{"year":2004,"claim":"Demonstrating that MCDS-associated NC1 domain mutations abolish trimerization identified the molecular mechanism underlying disease pathogenesis.","evidence":"In vitro coupled transcription/translation and SDS-PAGE showed that Y582D, Y598D, and Q653P mutant α1(X) chains fail to form SDS-stable trimers","pmids":["15024737"],"confidence":"High","gaps":["Whether disrupted trimerization causes ER retention and cellular stress was not yet tested","In vivo phenotypic consequences of individual mutations were not modeled"]},{"year":2005,"claim":"Establishing that nonsense mutations undergo NMD while missense mutations disrupt trimerization revealed two distinct pathogenic mechanisms — haploinsufficiency and dominant-negative — converging on MCDS.","evidence":"In vitro assembly assays and patient cartilage mRNA analysis showed NMD of nonsense mutant mRNA versus trimerization failure of missense mutant protein","pmids":["15880705"],"confidence":"High","gaps":["Whether a single mutation could engage both mechanisms simultaneously was unknown","In vivo modeling of NMD versus dominant-negative effects was lacking"]},{"year":2007,"claim":"Proving that truncated mutant chains are retained in the ER and trigger UPR established ER stress as a central cellular pathogenic event in MCDS, beyond simple loss of extracellular collagen X.","evidence":"Transgenic FCdel mice expressing a frameshift COL10A1 mutant showed ER retention, UPR activation, and dosage-dependent growth plate disruption","pmids":["17403716"],"confidence":"High","gaps":["Whether pharmacological modulation of ER stress could rescue the phenotype was untested","Relative contributions of ER stress versus extracellular matrix deficiency to MCDS remained unclear"]},{"year":2008,"claim":"Identifying CpG methylation-based silencing of COL10A1 in non-hypertrophic chondrocytes revealed an epigenetic layer of tissue-specific gene regulation.","evidence":"Bisulfite sequencing and COBRA showed specific CpG sites methylated in articular chondrocytes (no COL10A1 expression) and demethylated during MSC chondrogenesis (COL10A1 on)","pmids":["18759285"],"confidence":"Medium","gaps":["Whether methylation changes are causative or correlative was not functionally tested with demethylating agents at specific sites","Identity of methyltransferases/demethylases involved was unknown"]},{"year":2010,"claim":"Two advances defined transcriptional control: Runx2 was shown to be necessary but not sufficient at the distal enhancer, and GADD45β/p38/C/EBPβ signaling was identified as an independent activating pathway at the proximal promoter, establishing a multi-input transcriptional logic for COL10A1.","evidence":"Transgenic mice with mutated Runx2 sites in the 150-bp enhancer lost reporter expression; dominant-negative p38 blocked GADD45β/C/EBPβ-mediated transactivation in reporter and ChIP assays","pmids":["21887706","20048163"],"confidence":"High","gaps":["Cooperating factors at the 150-bp enhancer besides Runx2 were not yet identified","How the proximal promoter and distal enhancer signals are integrated was unclear"]},{"year":2014,"claim":"Identifying a broader set of transcription factors (AP1, MEF2, NFAT, Runx1, TBX5, Cox-2) at the 150-bp enhancer suggested a multi-protein regulatory complex centered on Runx2.","evidence":"Yeast one-hybrid screen, mass spectrometry, EMSA, and ChIP confirmed Cox-2 direct binding to the enhancer","pmids":["25321476"],"confidence":"Medium","gaps":["Functional requirement of each factor was not individually tested in vivo","Stoichiometry and assembly order of the enhancer complex were unknown"]},{"year":2018,"claim":"Pharmacological rescue of MCDS by carbamazepine-stimulated proteolysis of ER-retained mutant collagen X demonstrated that ER stress is a druggable pathogenic mechanism, validating the UPR model.","evidence":"Col10a1 p.Y632X knock-in mice treated with carbamazepine showed reduced ER stress markers, restored growth plate architecture, and increased bone growth","pmids":["30010889"],"confidence":"High","gaps":["Long-term safety and efficacy in patients not established","Whether carbamazepine acts specifically on collagen X versus general ER proteostasis was unclear"]},{"year":2018,"claim":"Demonstrating that SOX9 directly activates COL10A1 transcription and that COL10A1 promotes EMT via SOX9-dependent mechanisms in gastric cancer revealed a previously unrecognized extracellular signaling role for collagen X beyond the growth plate.","evidence":"EMSA, ChIP, and promoter reporter assays in gastric cancer cells; SOX9 knockdown abolished COL10A1-driven EMT; nude mouse metastasis assays","pmids":["30154451"],"confidence":"High","gaps":["Receptor mediating COL10A1 signaling in gastric cancer was not identified in this study","Relevance to in vivo human cancer progression was correlative"]},{"year":2020,"claim":"Identification of DDR2 as the receptor for COL10A1 signaling through FAK established a molecular mechanism for collagen X-driven cancer cell proliferation and invasion.","evidence":"Co-immunoprecipitation of COL10A1 and DDR2 in lung adenocarcinoma cells; COL10A1 manipulation modulated DDR2 and FAK phosphorylation","pmids":["33324550"],"confidence":"Medium","gaps":["Direct binding domain mapping between COL10A1 and DDR2 was not performed","Whether DDR2 mediates COL10A1 signaling in non-cancer hypertrophic chondrocytes was untested"]},{"year":2021,"claim":"Identification of miR-218 and TBX5 as negative regulators of COL10A1 demonstrated that hypertrophic differentiation is controlled by a balance of activators and repressors converging on COL10A1.","evidence":"miR-218 reporter assay and pulldown confirmed direct targeting of COL10A1; TBX5 overexpression in transgenic mice decreased Col10a1 and delayed ossification","pmids":["33303006","34276786"],"confidence":"Medium","gaps":["Physiological contexts in which TBX5 and miR-218 are activated to suppress hypertrophy were not defined","Interaction between TBX5 repression and enhancer-bound activators was not resolved"]},{"year":2022,"claim":"Extension of DDR2-mediated signaling to MEK/ERK in pancreatic cancer, and discovery of m6A-mediated COL10A1 mRNA stabilization in cancer-associated fibroblasts, broadened the oncogenic mechanisms of COL10A1 beyond cell-autonomous DDR2/FAK signaling.","evidence":"MEK/ERK pathway analysis upon COL10A1 manipulation in pancreatic cancer cells; MeRIP-seq identified METTL3-dependent m6A on COL10A1 mRNA in CAFs promoting mRNA stability","pmids":["36530986","36246404"],"confidence":"Medium","gaps":["Specific m6A sites on COL10A1 mRNA were not individually validated","Whether DDR2-dependent signaling is the sole effector pathway in all cancer types was unclear"]},{"year":2023,"claim":"Identification of DLX5 as a direct activator at the Col10a1 enhancer began to resolve which cooperating factors partner with Runx2 to achieve hypertrophic specificity.","evidence":"ChIP and dual-luciferase reporter assays showed DLX5 binding to the 150-bp enhancer; DLX5 knockdown reduced Col10a1 expression","pmids":["37492739"],"confidence":"Medium","gaps":["Whether DLX5 and Runx2 physically interact at the enhancer was not demonstrated","Sufficiency of DLX5 plus Runx2 for hypertrophic specificity was not tested in vivo"]},{"year":2024,"claim":"DDX5 was identified as another direct transcriptional activator at the Col10a1 enhancer, further populating the enhancer-bound complex model and linking RNA helicase activity to COL10A1 regulation.","evidence":"ChIP and dual-luciferase reporter assays in ATDC5 cells; Ddx5 knockdown reduced COL10A1 expression and impaired chondrocyte maturation markers","pmids":["38715834"],"confidence":"Medium","gaps":["Whether DDX5 acts via its helicase activity or as a transcriptional coactivator was not distinguished","Combinatorial requirement of DDX5, DLX5, and Runx2 was not tested"]},{"year":2025,"claim":"Demonstration that a single frameshift mutation can simultaneously undergo NMD and exert dominant-negative effects on trimerization unified the previously dichotomous haploinsufficiency versus dominant-negative models of MCDS pathogenesis.","evidence":"In vitro trimerization assay and mRNA stability analysis of COL10A1 p.W651fsX666 from an MCDS family","pmids":["40398448"],"confidence":"Medium","gaps":["In vivo confirmation of dual mechanism in an animal model was not provided","Relative contribution of each mechanism to disease severity is unknown"]},{"year":null,"claim":"The full combinatorial logic of the 150-bp enhancer complex (how Runx2, DLX5, DDX5, and other factors are assembled and coordinated), the structural basis of COL10A1-DDR2 interaction, and whether collagen X has signaling functions in normal physiology beyond the growth plate remain unresolved.","evidence":"","pmids":[],"confidence":"Low","gaps":["No structural model of the enhancer-bound transcription factor complex exists","Crystal structure of COL10A1 interaction with DDR2 has not been solved","Whether collagen X has physiological signaling roles outside cartilage and cancer is untested"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0005198","term_label":"structural molecule activity","supporting_discovery_ids":[5,6,7,27]},{"term_id":"GO:0048018","term_label":"receptor ligand activity","supporting_discovery_ids":[10,11,26]}],"localization":[{"term_id":"GO:0005576","term_label":"extracellular region","supporting_discovery_ids":[4,6,12,27]},{"term_id":"GO:0005783","term_label":"endoplasmic reticulum","supporting_discovery_ids":[4,8]},{"term_id":"GO:0031012","term_label":"extracellular matrix","supporting_discovery_ids":[27]}],"pathway":[{"term_id":"R-HSA-1474244","term_label":"Extracellular matrix organization","supporting_discovery_ids":[5,6,7,27]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[0,2,27]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[10,11,26]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[4,5,6,8]}],"complexes":["Type X collagen homotrimer"],"partners":["RUNX2","DDR2","DLX5","DDX5","SOX9","CEBPB","TBX5"],"other_free_text":[]},"mechanistic_narrative":"COL10A1 encodes the α1 chain of type X collagen, a homotrimeric short-chain collagen whose expression is restricted to hypertrophic chondrocytes during endochondral ossification, where it serves as a hallmark marker of chondrocyte hypertrophy [PMID:8477738]. The C-terminal NC1 domain mediates chain trimerization; disease-causing missense mutations in this domain abolish trimer assembly, while nonsense/frameshift mutations can act through both nonsense-mediated mRNA decay (haploinsufficiency) and dominant-negative disruption of wild-type chain trimerization, with retained misfolded protein triggering ER stress and the unfolded protein response — collectively causing Schmid-type metaphyseal chondrodysplasia (MCDS) [PMID:15024737, PMID:15880705, PMID:17403716, PMID:30010889]. Transcription of COL10A1 in hypertrophic chondrocytes is driven by a 150-bp distal cis-enhancer requiring direct Runx2 binding together with cooperating factors DLX5 and DDX5, while GADD45β/p38/C/EBPβ signaling activates the proximal promoter and SOX9 provides additional transcriptional input; epigenetic silencing occurs via promoter CpG methylation, and miR-218, miR-26b-5p, and miR-101 post-transcriptionally repress COL10A1 [PMID:21887706, PMID:37492739, PMID:38715834, PMID:20048163, PMID:18759285, PMID:33303006]. In cancer contexts, secreted collagen X signals through DDR2 to activate FAK and MEK/ERK pathways, promoting epithelial–mesenchymal transition, proliferation, and metastasis across multiple carcinoma types [PMID:33324550, PMID:36530986, PMID:30154451]."},"prefetch_data":{"uniprot":{"accession":"Q03692","full_name":"Collagen alpha-1(X) chain","aliases":[],"length_aa":680,"mass_kda":66.2,"function":"Type X collagen is a product of hypertrophic chondrocytes and has been localized to presumptive mineralization zones of hyaline cartilage","subcellular_location":"Secreted, extracellular space, extracellular matrix","url":"https://www.uniprot.org/uniprotkb/Q03692/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/COL10A1","classification":"Not Classified","n_dependent_lines":0,"n_total_lines":1208,"dependency_fraction":0.0},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/COL10A1","total_profiled":1310},"omim":[{"mim_id":"620882","title":"SECONDARY OSSIFICATION CENTER-ASSOCIATED REGULATOR OF CHONDROCYTE MATURATION; SNORC","url":"https://www.omim.org/entry/620882"},{"mim_id":"617195","title":"MUSCULOSKELETAL EMBRYONIC NUCLEAR PROTEIN 1; MUSTN1","url":"https://www.omim.org/entry/617195"},{"mim_id":"611894","title":"MICRO RNA 140; MIR140","url":"https://www.omim.org/entry/611894"},{"mim_id":"608752","title":"C1q- AND TUMOR NECROSIS FACTOR-RELATED PROTEIN 5; C1QTNF5","url":"https://www.omim.org/entry/608752"},{"mim_id":"603349","title":"ENDOTHELIAL PAS DOMAIN PROTEIN 1; EPAS1","url":"https://www.omim.org/entry/603349"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Endoplasmic reticulum","reliability":"Approved"}],"tissue_specificity":"Tissue enhanced","tissue_distribution":"Detected in some","driving_tissues":[{"tissue":"gallbladder","ntpm":8.3},{"tissue":"ovary","ntpm":5.5}],"url":"https://www.proteinatlas.org/search/COL10A1"},"hgnc":{"alias_symbol":[],"prev_symbol":[]},"alphafold":{"accession":"Q03692","domains":[{"cath_id":"2.60.120.40","chopping":"556-678","consensus_level":"high","plddt":97.1723,"start":556,"end":678}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q03692","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q03692-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q03692-F1-predicted_aligned_error_v6.png","plddt_mean":57.5},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=COL10A1","jax_strain_url":"https://www.jax.org/strain/search?query=COL10A1"},"sequence":{"accession":"Q03692","fasta_url":"https://rest.uniprot.org/uniprotkb/Q03692.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q03692/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q03692"}},"corpus_meta":[{"pmid":"30154451","id":"PMC_30154451","title":"TGF-β1-SOX9 axis-inducible COL10A1 promotes invasion and metastasis in gastric cancer via epithelial-to-mesenchymal transition.","date":"2018","source":"Cell death & disease","url":"https://pubmed.ncbi.nlm.nih.gov/30154451","citation_count":156,"is_preprint":false},{"pmid":"25321476","id":"PMC_25321476","title":"Identification and characterization of the novel Col10a1 regulatory mechanism during chondrocyte hypertrophic differentiation.","date":"2014","source":"Cell death & disease","url":"https://pubmed.ncbi.nlm.nih.gov/25321476","citation_count":94,"is_preprint":false},{"pmid":"18759285","id":"PMC_18759285","title":"Correlation of COL10A1 induction during chondrogenesis of mesenchymal stem cells with demethylation of two CpG sites in the COL10A1 promoter.","date":"2008","source":"Arthritis and rheumatism","url":"https://pubmed.ncbi.nlm.nih.gov/18759285","citation_count":77,"is_preprint":false},{"pmid":"38374072","id":"PMC_38374072","title":"M2 macrophage-derived exosomal miR-26b-5p regulates macrophage polarization and chondrocyte hypertrophy by targeting TLR3 and COL10A1 to alleviate osteoarthritis.","date":"2024","source":"Journal of nanobiotechnology","url":"https://pubmed.ncbi.nlm.nih.gov/38374072","citation_count":68,"is_preprint":false},{"pmid":"8782043","id":"PMC_8782043","title":"Mutations within the gene encoding the alpha 1 (X) chain of type X collagen (COL10A1) cause metaphyseal chondrodysplasia type Schmid but not several other forms of metaphyseal chondrodysplasia.","date":"1996","source":"Journal of medical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/8782043","citation_count":67,"is_preprint":false},{"pmid":"21887706","id":"PMC_21887706","title":"Runx2 contributes to murine Col10a1 gene regulation through direct interaction with its cis-enhancer.","date":"2011","source":"Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research","url":"https://pubmed.ncbi.nlm.nih.gov/21887706","citation_count":64,"is_preprint":false},{"pmid":"17683641","id":"PMC_17683641","title":"Prostaglandin PGE2 at very low concentrations suppresses collagen cleavage in cultured human osteoarthritic articular cartilage: this involves a decrease in expression of proinflammatory genes, collagenases and COL10A1, a gene linked to chondrocyte hypertrophy.","date":"2007","source":"Arthritis research & therapy","url":"https://pubmed.ncbi.nlm.nih.gov/17683641","citation_count":60,"is_preprint":false},{"pmid":"15880705","id":"PMC_15880705","title":"Mutations of COL10A1 in Schmid metaphyseal chondrodysplasia.","date":"2005","source":"Human mutation","url":"https://pubmed.ncbi.nlm.nih.gov/15880705","citation_count":59,"is_preprint":false},{"pmid":"8477738","id":"PMC_8477738","title":"Intron-exon structure, alternative use of promoter and expression of the mouse collagen X gene, Col10a-1.","date":"1993","source":"European journal of biochemistry","url":"https://pubmed.ncbi.nlm.nih.gov/8477738","citation_count":59,"is_preprint":false},{"pmid":"17403716","id":"PMC_17403716","title":"COL10A1 nonsense and frame-shift mutations have a gain-of-function effect on the growth plate in human and mouse metaphyseal chondrodysplasia type Schmid.","date":"2007","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/17403716","citation_count":58,"is_preprint":false},{"pmid":"8004099","id":"PMC_8004099","title":"Additional mutations of type X collagen confirm COL10A1 as the Schmid metaphyseal chondrodysplasia locus.","date":"1994","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/8004099","citation_count":58,"is_preprint":false},{"pmid":"22894674","id":"PMC_22894674","title":"COL10A1 expression is elevated in diverse solid tumor types and is associated with tumor vasculature.","date":"2012","source":"Future oncology (London, England)","url":"https://pubmed.ncbi.nlm.nih.gov/22894674","citation_count":57,"is_preprint":false},{"pmid":"18692570","id":"PMC_18692570","title":"Specific expression of Cre recombinase in hypertrophic cartilage under the control of a BAC-Col10a1 promoter.","date":"2008","source":"Matrix biology : journal of the International Society for Matrix Biology","url":"https://pubmed.ncbi.nlm.nih.gov/18692570","citation_count":54,"is_preprint":false},{"pmid":"21328521","id":"PMC_21328521","title":"Generation and characterization of Col10a1-mcherry reporter mice.","date":"2011","source":"Genesis (New York, N.Y. : 2000)","url":"https://pubmed.ncbi.nlm.nih.gov/21328521","citation_count":50,"is_preprint":false},{"pmid":"23769979","id":"PMC_23769979","title":"A col10a1:nlGFP transgenic line displays putative osteoblast precursors at the medaka notochordal sheath prior to mineralization.","date":"2013","source":"Developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/23769979","citation_count":47,"is_preprint":false},{"pmid":"33324550","id":"PMC_33324550","title":"Upregulated Collagen COL10A1 Remodels the Extracellular Matrix and Promotes Malignant Progression in Lung Adenocarcinoma.","date":"2020","source":"Frontiers in oncology","url":"https://pubmed.ncbi.nlm.nih.gov/33324550","citation_count":46,"is_preprint":false},{"pmid":"9067753","id":"PMC_9067753","title":"Mutations in the N-terminal globular domain of the type X collagen gene (COL10A1) in patients with Schmid metaphyseal chondrodysplasia.","date":"1997","source":"Human mutation","url":"https://pubmed.ncbi.nlm.nih.gov/9067753","citation_count":45,"is_preprint":false},{"pmid":"20048163","id":"PMC_20048163","title":"GADD45beta enhances Col10a1 transcription via the MTK1/MKK3/6/p38 axis and activation of C/EBPbeta-TAD4 in terminally differentiating chondrocytes.","date":"2010","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/20048163","citation_count":40,"is_preprint":false},{"pmid":"39198393","id":"PMC_39198393","title":"LncRNA HAGLROS promotes breast cancer evolution through miR-135b-3p/COL10A1 axis and exosome-mediated macrophage M2 polarization.","date":"2024","source":"Cell death & disease","url":"https://pubmed.ncbi.nlm.nih.gov/39198393","citation_count":39,"is_preprint":false},{"pmid":"9837818","id":"PMC_9837818","title":"Mutation of the type X collagen gene (COL10A1) causes spondylometaphyseal dysplasia.","date":"1998","source":"American journal of human genetics","url":"https://pubmed.ncbi.nlm.nih.gov/9837818","citation_count":39,"is_preprint":false},{"pmid":"16088909","id":"PMC_16088909","title":"Schmid type of metaphyseal chondrodysplasia and COL10A1 mutations--findings in 10 patients.","date":"2005","source":"American journal of medical genetics. Part A","url":"https://pubmed.ncbi.nlm.nih.gov/16088909","citation_count":39,"is_preprint":false},{"pmid":"1329505","id":"PMC_1329505","title":"SSCP and segregation analysis of the human type X collagen gene (COL10A1) in heritable forms of chondrodysplasia.","date":"1992","source":"American journal of human genetics","url":"https://pubmed.ncbi.nlm.nih.gov/1329505","citation_count":33,"is_preprint":false},{"pmid":"32587446","id":"PMC_32587446","title":"High plasma levels of COL10A1 are associated with advanced tumor stage in gastric cancer patients.","date":"2020","source":"World journal of gastroenterology","url":"https://pubmed.ncbi.nlm.nih.gov/32587446","citation_count":33,"is_preprint":false},{"pmid":"33637669","id":"PMC_33637669","title":"Collagen Type X Alpha 1 (COL10A1) Contributes to Cell Proliferation, Migration, and Invasion by Targeting Prolyl 4-Hydroxylase Beta Polypeptide (P4HB) in Breast Cancer.","date":"2021","source":"Medical science monitor : international medical journal of experimental and clinical research","url":"https://pubmed.ncbi.nlm.nih.gov/33637669","citation_count":30,"is_preprint":false},{"pmid":"28042296","id":"PMC_28042296","title":"Deferoxamine Suppresses Collagen Cleavage and Protease, Cytokine, and COL10A1 Expression and Upregulates AMPK and Krebs Cycle Genes in Human Osteoarthritic Cartilage.","date":"2016","source":"International journal of rheumatology","url":"https://pubmed.ncbi.nlm.nih.gov/28042296","citation_count":27,"is_preprint":false},{"pmid":"32096148","id":"PMC_32096148","title":"Effect of miR-26a-5p on gastric cancer cell proliferation, migration and invasion by targeting COL10A1.","date":"2020","source":"European review for medical and pharmacological sciences","url":"https://pubmed.ncbi.nlm.nih.gov/32096148","citation_count":26,"is_preprint":false},{"pmid":"36246404","id":"PMC_36246404","title":"Cancer-Associated Fibroblasts Hinder Lung Squamous Cell Carcinoma Oxidative Stress-Induced Apoptosis via METTL3 Mediated m6A Methylation of COL10A1.","date":"2022","source":"Oxidative medicine and cellular longevity","url":"https://pubmed.ncbi.nlm.nih.gov/36246404","citation_count":26,"is_preprint":false},{"pmid":"2037056","id":"PMC_2037056","title":"Cloning of human alpha 1(X) collagen DNA and localization of the COL10A1 gene to the q21-q22 region of human chromosome 6.","date":"1991","source":"FEBS letters","url":"https://pubmed.ncbi.nlm.nih.gov/2037056","citation_count":26,"is_preprint":false},{"pmid":"17051351","id":"PMC_17051351","title":"BAC constructs in transgenic reporter mouse lines control efficient and specific LacZ expression in hypertrophic chondrocytes under the complete Col10a1 promoter.","date":"2006","source":"Histochemistry and cell biology","url":"https://pubmed.ncbi.nlm.nih.gov/17051351","citation_count":25,"is_preprint":false},{"pmid":"30010889","id":"PMC_30010889","title":"Carbamazepine reduces disease severity in a mouse model of metaphyseal chondrodysplasia type Schmid caused by a premature stop codon (Y632X) in the Col10a1 gene.","date":"2018","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/30010889","citation_count":25,"is_preprint":false},{"pmid":"23852131","id":"PMC_23852131","title":"Establishment of a bone-specific col10a1:GFP transgenic zebrafish.","date":"2013","source":"Molecules and cells","url":"https://pubmed.ncbi.nlm.nih.gov/23852131","citation_count":24,"is_preprint":false},{"pmid":"33303006","id":"PMC_33303006","title":"MiR-218 affects hypertrophic differentiation of human mesenchymal stromal cells during chondrogenesis via targeting RUNX2, MEF2C, and COL10A1.","date":"2020","source":"Stem cell research & therapy","url":"https://pubmed.ncbi.nlm.nih.gov/33303006","citation_count":19,"is_preprint":false},{"pmid":"37492739","id":"PMC_37492739","title":"DLX5 promotes Col10a1 expression and chondrocyte hypertrophy and is involved in osteoarthritis progression.","date":"2023","source":"Genes & diseases","url":"https://pubmed.ncbi.nlm.nih.gov/37492739","citation_count":19,"is_preprint":false},{"pmid":"15024737","id":"PMC_15024737","title":"Identification of four novel COL10A1 missense mutations in schmid metaphyseal chondrodysplasia: further evidence that collagen X NC1 mutations impair trimer assembly.","date":"2004","source":"Human mutation","url":"https://pubmed.ncbi.nlm.nih.gov/15024737","citation_count":19,"is_preprint":false},{"pmid":"32326527","id":"PMC_32326527","title":"RNAseq-Based Prioritization Revealed COL6A5, COL8A1, COL10A1 and MIR146A as Common and Differential Susceptibility Biomarkers for Psoriasis and Psoriatic Arthritis: Confirmation from Genotyping Analysis of 1417 Italian Subjects.","date":"2020","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/32326527","citation_count":17,"is_preprint":false},{"pmid":"36530986","id":"PMC_36530986","title":"COL10A1-DDR2 axis promotes the progression of pancreatic cancer by regulating MEK/ERK signal transduction.","date":"2022","source":"Frontiers in oncology","url":"https://pubmed.ncbi.nlm.nih.gov/36530986","citation_count":16,"is_preprint":false},{"pmid":"25628784","id":"PMC_25628784","title":"Col10a1-Runx2 transgenic mice with delayed chondrocyte maturation are less susceptible to developing osteoarthritis.","date":"2014","source":"American journal of translational research","url":"https://pubmed.ncbi.nlm.nih.gov/25628784","citation_count":16,"is_preprint":false},{"pmid":"9781029","id":"PMC_9781029","title":"Assignment of gene responsible for progressive pseudorheumatoid dysplasia to chromosome 6 and examination of COL10A1 as candidate gene.","date":"1998","source":"European journal of human genetics : EJHG","url":"https://pubmed.ncbi.nlm.nih.gov/9781029","citation_count":16,"is_preprint":false},{"pmid":"36267978","id":"PMC_36267978","title":"COL10A1 allows stratification of invasiveness of colon cancer and associates to extracellular matrix and immune cell enrichment in the tumor parenchyma.","date":"2022","source":"Frontiers in oncology","url":"https://pubmed.ncbi.nlm.nih.gov/36267978","citation_count":14,"is_preprint":false},{"pmid":"33764685","id":"PMC_33764685","title":"Characterization of a novel COL10A1 variant associated with Schmid-type metaphyseal chondrodysplasia and a literature review.","date":"2021","source":"Molecular genetics & genomic medicine","url":"https://pubmed.ncbi.nlm.nih.gov/33764685","citation_count":13,"is_preprint":false},{"pmid":"39392043","id":"PMC_39392043","title":"Oncogenic mechanisms of COL10A1 in cancer and clinical challenges (Review).","date":"2024","source":"Oncology reports","url":"https://pubmed.ncbi.nlm.nih.gov/39392043","citation_count":12,"is_preprint":false},{"pmid":"34276786","id":"PMC_34276786","title":"Expression Profiling and Functional Analysis of Candidate Col10a1 Regulators Identified by the TRAP Program.","date":"2021","source":"Frontiers in genetics","url":"https://pubmed.ncbi.nlm.nih.gov/34276786","citation_count":12,"is_preprint":false},{"pmid":"31737217","id":"PMC_31737217","title":"Hypertrophic chondrocyte-specific Col10a1 controlling elements in Cre recombinase transgenic studies.","date":"2019","source":"American journal of translational research","url":"https://pubmed.ncbi.nlm.nih.gov/31737217","citation_count":12,"is_preprint":false},{"pmid":"38345033","id":"PMC_38345033","title":"Krüppel-like factor 4 modulates the miR-101/COL10A1 axis to inhibit renal fibrosis after AKI by regulating epithelial-mesenchymal transition.","date":"2024","source":"Renal failure","url":"https://pubmed.ncbi.nlm.nih.gov/38345033","citation_count":12,"is_preprint":false},{"pmid":"31325454","id":"PMC_31325454","title":"Lineage tracing of col10a1 cells identifies distinct progenitor populations for osteoblasts and joint cells in the regenerating fin of medaka (Oryzias latipes).","date":"2019","source":"Developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/31325454","citation_count":12,"is_preprint":false},{"pmid":"39247832","id":"PMC_39247832","title":"METTL16 Promotes Stability of SYNPO2L mRNA and leading to Cancer Cell Lung Metastasis by Secretion of COL10A1 and attract the Cancer-Associated Fibroblasts.","date":"2024","source":"International journal of biological sciences","url":"https://pubmed.ncbi.nlm.nih.gov/39247832","citation_count":10,"is_preprint":false},{"pmid":"21739142","id":"PMC_21739142","title":"Association and expression study of MMP3, TGFβ1 and COL10A1 as candidate genes for leg weakness-related traits in pigs.","date":"2011","source":"Molecular biology reports","url":"https://pubmed.ncbi.nlm.nih.gov/21739142","citation_count":10,"is_preprint":false},{"pmid":"8986632","id":"PMC_8986632","title":"Dideoxyfingerprinting (ddF) analysis of the type X collagen gene (COL10A1) and identification of a novel mutation (S671P) in a kindred with Schmid metaphyseal chondrodysplasia.","date":"1996","source":"Biochemical and molecular medicine","url":"https://pubmed.ncbi.nlm.nih.gov/8986632","citation_count":10,"is_preprint":false},{"pmid":"35181619","id":"PMC_35181619","title":"VSNL1 Promotes Cell Proliferation, Migration, and Invasion in Colorectal Cancer by Binding with COL10A1.","date":"2022","source":"Annals of clinical and laboratory science","url":"https://pubmed.ncbi.nlm.nih.gov/35181619","citation_count":9,"is_preprint":false},{"pmid":"20872587","id":"PMC_20872587","title":"Early-onset metaphyseal chondrodysplasia type Schmid associated with a COL10A1 frame-shift mutation and impaired trimerization of wild-type α1(X) protein chains.","date":"2010","source":"Journal of orthopaedic research : official publication of the Orthopaedic Research Society","url":"https://pubmed.ncbi.nlm.nih.gov/20872587","citation_count":9,"is_preprint":false},{"pmid":"40826474","id":"PMC_40826474","title":"COL10A1+ fibroblasts promote colorectal cancer metastasis and M2 macrophage polarization with pan-cancer relevance.","date":"2025","source":"Journal of experimental & clinical cancer research : CR","url":"https://pubmed.ncbi.nlm.nih.gov/40826474","citation_count":8,"is_preprint":false},{"pmid":"35929139","id":"PMC_35929139","title":"High COL10A1 expression potentially contributes to poor outcomes in gastric cancer with the help of LEF1 and Wnt2.","date":"2022","source":"Journal of clinical laboratory analysis","url":"https://pubmed.ncbi.nlm.nih.gov/35929139","citation_count":8,"is_preprint":false},{"pmid":"25542771","id":"PMC_25542771","title":"Case of mild Schmid-type metaphyseal chondrodysplasia with novel sequence variation involving an unusual mutational site of the COL10A1 gene.","date":"2014","source":"European journal of medical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/25542771","citation_count":8,"is_preprint":false},{"pmid":"31191752","id":"PMC_31191752","title":"RAD51B (rs8017304 and rs2588809), TRIB1 (rs6987702, rs4351379, and rs4351376), COL8A1 (rs13095226), and COL10A1 (rs1064583) Gene Variants with Predisposition to Age-Related Macular Degeneration.","date":"2019","source":"Disease markers","url":"https://pubmed.ncbi.nlm.nih.gov/31191752","citation_count":8,"is_preprint":false},{"pmid":"38916477","id":"PMC_38916477","title":"COL10A1 expression distinguishes a subset of cancer-associated fibroblasts present in the stroma of high-risk basal cell carcinoma.","date":"2024","source":"The British journal of dermatology","url":"https://pubmed.ncbi.nlm.nih.gov/38916477","citation_count":7,"is_preprint":false},{"pmid":"31856751","id":"PMC_31856751","title":"Identification of two novel COL10A1 heterozygous mutations in two Chinese pedigrees with Schmid-type metaphyseal chondrodysplasia.","date":"2019","source":"BMC medical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/31856751","citation_count":7,"is_preprint":false},{"pmid":"30209734","id":"PMC_30209734","title":"Schmid Type Metaphyseal Chondrodysplasia with a Novel COL10A1 Mutation.","date":"2018","source":"Indian journal of pediatrics","url":"https://pubmed.ncbi.nlm.nih.gov/30209734","citation_count":7,"is_preprint":false},{"pmid":"37974070","id":"PMC_37974070","title":"COL10A1 promotes tumorigenesis by modulating CD276 in pancreatic adenocarcinoma.","date":"2023","source":"BMC gastroenterology","url":"https://pubmed.ncbi.nlm.nih.gov/37974070","citation_count":7,"is_preprint":false},{"pmid":"31348255","id":"PMC_31348255","title":"A novel sequence variant in COL10A1 causing spondylometaphyseal dysplasia accompanied with coxa valga: A case report.","date":"2019","source":"Medicine","url":"https://pubmed.ncbi.nlm.nih.gov/31348255","citation_count":7,"is_preprint":false},{"pmid":"16845471","id":"PMC_16845471","title":"Deletions in the COL10A1 gene are not associated with skeletal changes in dogs.","date":"2006","source":"Mammalian genome : official journal of the International Mammalian Genome Society","url":"https://pubmed.ncbi.nlm.nih.gov/16845471","citation_count":6,"is_preprint":false},{"pmid":"31921940","id":"PMC_31921940","title":"A novel missense COL10A1 mutation: c.2020G>A; p. Gly674Arg linked with the bowed legs stature in the Schmid metaphyseal chondrodysplasia-affected Chinese lineage.","date":"2019","source":"Bone reports","url":"https://pubmed.ncbi.nlm.nih.gov/31921940","citation_count":6,"is_preprint":false},{"pmid":"38147021","id":"PMC_38147021","title":"Experimental validation and pan-cancer analysis identified COL10A1 as a novel oncogene and potential therapeutic target in prostate cancer.","date":"2023","source":"Aging","url":"https://pubmed.ncbi.nlm.nih.gov/38147021","citation_count":5,"is_preprint":false},{"pmid":"23441228","id":"PMC_23441228","title":"Downregulation of carbonic anhydrase IX promotes Col10a1 expression in chondrocytes.","date":"2013","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/23441228","citation_count":5,"is_preprint":false},{"pmid":"34520774","id":"PMC_34520774","title":"COL10A1 is a novel factor in the development of choroidal neovascularization.","date":"2021","source":"Microvascular research","url":"https://pubmed.ncbi.nlm.nih.gov/34520774","citation_count":5,"is_preprint":false},{"pmid":"31191206","id":"PMC_31191206","title":"A Venezuelan Case of Schmid-Type Metaphyseal Chondrodysplasia with a Novel Mutation in COL10A1.","date":"2019","source":"Molecular syndromology","url":"https://pubmed.ncbi.nlm.nih.gov/31191206","citation_count":5,"is_preprint":false},{"pmid":"29234170","id":"PMC_29234170","title":"A missense point mutation in COL10A1 identified with whole-genome deep sequencing in a 7-generation Pakistan dwarf family.","date":"2017","source":"Heredity","url":"https://pubmed.ncbi.nlm.nih.gov/29234170","citation_count":5,"is_preprint":false},{"pmid":"36400164","id":"PMC_36400164","title":"Natural history and genetic spectrum of the Turkish metaphyseal dysplasia cohort, including rare types caused by biallelic COL10A1, COL2A1, and LBR variants.","date":"2022","source":"Bone","url":"https://pubmed.ncbi.nlm.nih.gov/36400164","citation_count":3,"is_preprint":false},{"pmid":"25974987","id":"PMC_25974987","title":"A novel COL10A1 mutation in a Chinese pedigree with Schmid type metaphyseal chondrodysplasia.","date":"2015","source":"Clinical laboratory","url":"https://pubmed.ncbi.nlm.nih.gov/25974987","citation_count":3,"is_preprint":false},{"pmid":"34380365","id":"PMC_34380365","title":"A detailed understanding of the COL10A1 and SOX9 genes interaction based on potentially damaging mutations in gastric cancer using computational techniques.","date":"2021","source":"Journal of biomolecular structure & dynamics","url":"https://pubmed.ncbi.nlm.nih.gov/34380365","citation_count":3,"is_preprint":false},{"pmid":"40398448","id":"PMC_40398448","title":"The p.W651fsX666 mutation on COL10A1 results in impaired trimerization of normal collagen X to induce Schmid type Metaphyseal chondrodysplasia.","date":"2025","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/40398448","citation_count":3,"is_preprint":false},{"pmid":"40380802","id":"PMC_40380802","title":"Resident CD24 +LCN2 + LPCs aggravate fibrosis and inflammatory progression via the recruitment of TPPP3 +COL10A1 + macrophages in NASH.","date":"2025","source":"Acta biochimica et biophysica Sinica","url":"https://pubmed.ncbi.nlm.nih.gov/40380802","citation_count":2,"is_preprint":false},{"pmid":"39656597","id":"PMC_39656597","title":"COL10A1 Facilitates Prostate Cancer Progression by Interacting With INHBA to Activate the PI3K/AKT Pathway.","date":"2024","source":"Journal of cellular and molecular medicine","url":"https://pubmed.ncbi.nlm.nih.gov/39656597","citation_count":2,"is_preprint":false},{"pmid":"24269824","id":"PMC_24269824","title":"Increased Col10a1 expression is not causative for the phenotype of Phex-deficient Hyp mice.","date":"2013","source":"Biochemical and biophysical research communications","url":"https://pubmed.ncbi.nlm.nih.gov/24269824","citation_count":2,"is_preprint":false},{"pmid":"34423584","id":"PMC_34423584","title":"Identification of a novel COL10A1: c.1952 G>T variant in a family with Schmid metaphyseal chondrodysplasia and development of a noninvasive prenatal testing method.","date":"2021","source":"Molecular genetics & genomic medicine","url":"https://pubmed.ncbi.nlm.nih.gov/34423584","citation_count":2,"is_preprint":false},{"pmid":"40169690","id":"PMC_40169690","title":"The regulatory effect of CoL10A1 to the intracranial vascular invasion and cell proliferation in breast cancer via EMT pathway.","date":"2025","source":"Scientific reports","url":"https://pubmed.ncbi.nlm.nih.gov/40169690","citation_count":2,"is_preprint":false},{"pmid":"14970698","id":"PMC_14970698","title":"Chromosome location, genomic organization of the porcine COL10A1 gene and model structure of the NC1 domain.","date":"2003","source":"Cytogenetic and genome research","url":"https://pubmed.ncbi.nlm.nih.gov/14970698","citation_count":1,"is_preprint":false},{"pmid":"38715834","id":"PMC_38715834","title":"Ddx5 participates in regulation of Col10a1 expression and chondrocyte hypertrophic differentiation in vitro.","date":"2024","source":"American journal of translational research","url":"https://pubmed.ncbi.nlm.nih.gov/38715834","citation_count":0,"is_preprint":false},{"pmid":"41303526","id":"PMC_41303526","title":"COL10A1 Overexpression Promotes Gastric Cancer Aggressiveness Through EMT and Major Oncogenic Pathways.","date":"2025","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/41303526","citation_count":0,"is_preprint":false},{"pmid":"38999967","id":"PMC_38999967","title":"Exudative Age-Related Macular Degeneration: Association between Treatment Efficacy and Single-Nucleotide Variants in RAD51B, TRIB1, COL8A1, COL10A1, IL-9, IL-10, and VEGFA Genes.","date":"2024","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/38999967","citation_count":0,"is_preprint":false},{"pmid":"41815119","id":"PMC_41815119","title":"COL10A1 transcriptional regulation of ANXA5-mediated ferroptosis is involved in malignant progression of head and neck squamous cell carcinoma.","date":"2026","source":"Translational cancer research","url":"https://pubmed.ncbi.nlm.nih.gov/41815119","citation_count":0,"is_preprint":false},{"pmid":"41977392","id":"PMC_41977392","title":"A Conserved Fibroblast-Myeloid Gene Signature in Digestive Cancers: Multi-Omics Integration Identifies DCN, COL10A1, CTHRC1, and TREM2 as Candidate Microenvironmental Markers.","date":"2026","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/41977392","citation_count":0,"is_preprint":false},{"pmid":"41302023","id":"PMC_41302023","title":"Cloning and Expression of Col10a1 Gene and Its Response to Wnt/TGF-β Signaling Inhibitors in the Chinese Three-Keeled Pond Turtle (Mauremys reevesii).","date":"2025","source":"Animals : an open access journal from MDPI","url":"https://pubmed.ncbi.nlm.nih.gov/41302023","citation_count":0,"is_preprint":false},{"pmid":null,"id":"bio_10.1101_2025.10.08.680342","title":"Arylsulfatase I is a novel lysosomal chondroitin sulfatase regulating endochondral ossification","date":"2025-10-09","source":"bioRxiv","url":"https://doi.org/10.1101/2025.10.08.680342","citation_count":0,"is_preprint":true}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":45763,"output_tokens":6622,"usd":0.118309},"stage2":{"model":"claude-opus-4-6","input_tokens":10334,"output_tokens":4097,"usd":0.231143},"total_usd":0.349452,"stage1_batch_id":"msgbatch_011kfMfE81o6CTcyhVUqumuW","stage2_batch_id":"msgbatch_01DTputS6WNkH745x1nVSoBo","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2011,\n      \"finding\": \"Runx2 directly interacts with two tandem-repeat Runx2 binding sites (TGTGGG-TGTGGC) within the 150-bp Col10a1 distal cis-enhancer, and this interaction is required but not sufficient for hypertrophic chondrocyte-specific Col10a1 expression in vivo; mutating these Runx2 sites abolishes cell-specific reporter expression in transgenic mice.\",\n      \"method\": \"EMSA, ChIP, transfection reporter assays, transgenic mice with Runx2-site mutations\",\n      \"journal\": \"Journal of bone and mineral research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — multiple orthogonal methods (EMSA, ChIP, in vivo transgenic mutagenesis) in single study with rigorous controls\",\n      \"pmids\": [\"21887706\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Multiple transcription factors interact with the 150-bp Col10a1 cis-enhancer, including AP1, MEF2, NFAT, Runx1, TBX5, Cox-1, and Cox-2; Cox-2 was confirmed to directly interact with this enhancer by EMSA and ChIP, supporting a Cox-2-containing, Runx2-centered Col10a1 regulatory complex in hypertrophic chondrocytes.\",\n      \"method\": \"In silico sequence analysis, yeast one-hybrid, mass spectrometry, EMSA, ChIP\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal methods (yeast one-hybrid, MS, EMSA, ChIP) in single study\",\n      \"pmids\": [\"25321476\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"GADD45β enhances Col10a1 transcription via the MTK1/MKK3/6/p38 signaling axis, acting through the transactivation domain TAD4 of C/EBPβ bound to the proximal Col10a1 promoter; dominant-negative p38 (but not JNK) disrupts GADD45β/C/EBPβ-mediated Col10a1 transactivation.\",\n      \"method\": \"Promoter reporter assay, dominant-negative kinase constructs, ChIP, siRNA knockdown, kinase pathway analysis\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — multiple orthogonal methods including reporter assay, ChIP, dominant-negative constructs, and in vivo genetic data (Gadd45β-/- mice)\",\n      \"pmids\": [\"20048163\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"COL10A1 expression during MSC chondrogenesis correlates with demethylation of two specific CpG sites in the COL10A1 promoter; in human articular chondrocytes (which do not express COL10A1), these sites are consistently methylated, indicating methylation-based epigenetic silencing.\",\n      \"method\": \"Combined Bisulfite Restriction Analysis (COBRA), bisulfite sequencing, qPCR for expression\",\n      \"journal\": \"Arthritis and rheumatism\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct bisulfite sequencing of specific CpG sites correlated with expression in multiple cell types, single lab\",\n      \"pmids\": [\"18759285\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"COL10A1 nonsense and frameshift mutations produce misfolded truncated α1(X) chains that are retained in the ER of hypertrophic chondrocytes, activate the unfolded protein response (UPR), and exert a dominant-negative effect by interfering with trimerization of wild-type α1(X) chains, disrupting chondrocyte differentiation in the growth plate.\",\n      \"method\": \"In vitro translation/assembly assay, transgenic mouse model (FCdel), ER retention immunostaining, UPR marker analysis\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — in vitro reconstitution of trimerization, transgenic mouse model with dosage-dependent phenotype, multiple orthogonal methods\",\n      \"pmids\": [\"17403716\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"MCDS-associated NC1 domain missense mutations (Y582D, Y598D, Q653P) in COL10A1 disrupt collagen X trimerization in vitro; wild-type collagen X assembles into SDS-stable trimers, whereas these mutant chains fail to trimerize, suggesting impaired NC1-mediated trimer assembly as the common pathogenic mechanism.\",\n      \"method\": \"In vitro coupled transcription/translation and SDS-PAGE trimer assembly assay\",\n      \"journal\": \"Human mutation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — in vitro reconstitution of trimerization with engineered mutant cDNAs, replicated across multiple mutation studies\",\n      \"pmids\": [\"15024737\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"COL10A1 missense mutations disrupt collagen X trimerization and secretion (examined by in vitro expression and cell transfection), while nonsense mutations lead to complete removal of mutant mRNA by nonsense-mediated mRNA decay (NMD), resulting in functional haploinsufficiency as the common mechanism for MCDS.\",\n      \"method\": \"In vitro expression and assembly assays, cell transfection, analysis of mutant mRNA stability in patient cartilage tissue\",\n      \"journal\": \"Human mutation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — reconstitution assembly assay combined with patient tissue mRNA analysis; findings independently replicated across labs\",\n      \"pmids\": [\"15880705\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"A COL10A1 frameshift mutant protein (p.G579fsX611) fails to trimerize and exerts a dominant-negative effect on wild-type α1(X) chain trimerization: trimerization of wild-type chains was significantly reduced (from 57% to 33%) when co-translated with mutant chains in a 1:1 ratio.\",\n      \"method\": \"In vitro coupled transcription/translation trimerization assembly assay\",\n      \"journal\": \"Journal of orthopaedic research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — quantitative in vitro reconstitution assay with wild-type and mutant chains\",\n      \"pmids\": [\"20872587\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"In a mouse model of MCDS (Col10a1 p.Y632X), the mutant protein is translated and retained intracellularly triggering ER stress and UPR; treatment with carbamazepine (which stimulates intracellular proteolysis) reduced ER stress, restored growth plate architecture, increased bone growth, and corrected hip distortion.\",\n      \"method\": \"Gene-targeted knock-in mouse model, ER stress/UPR marker analysis, carbamazepine pharmacological rescue\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — in vivo genetic model with pharmacological rescue and quantitative phenotypic readouts\",\n      \"pmids\": [\"30010889\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"SOX9 directly binds to the COL10A1 gene promoter and activates its transcription; TGF-β1 treatment increases Smad2 phosphorylation, upregulates SOX9, which in turn increases COL10A1 expression; COL10A1 promotes EMT and metastasis in gastric cancer cells, and SOX9 is required for COL10A1-mediated EMT and invasiveness.\",\n      \"method\": \"EMSA, ChIP assay, promoter reporter assay, siRNA knockdown, nude mouse metastasis model\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — EMSA, ChIP, and promoter reporter assays plus in vivo functional validation with multiple orthogonal methods\",\n      \"pmids\": [\"30154451\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"COL10A1 interacts with DDR2 (discoidin domain receptor 2) and activates the downstream FAK signaling pathway to regulate lung adenocarcinoma cell proliferation and invasion; knockdown or overexpression of COL10A1 modulates DDR2 and FAK activity.\",\n      \"method\": \"Co-immunoprecipitation, gain- and loss-of-function experiments, FAK signaling analysis, in vitro and in vivo functional assays\",\n      \"journal\": \"Frontiers in oncology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — Co-IP interaction plus functional rescue, single lab\",\n      \"pmids\": [\"33324550\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"COL10A1 activates the MEK/ERK signaling pathway by binding to DDR2 in pancreatic cancer cells, leading to EMT and accelerated cancer progression; COL10A1 overexpression enhanced proliferation and migration, and DDR2 expression was regulated by COL10A1.\",\n      \"method\": \"Overexpression/knockdown functional assays, MEK/ERK signaling analysis, EMT marker assessment\",\n      \"journal\": \"Frontiers in oncology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — functional signaling pathway analysis in cancer cell lines, single lab, no direct binding reconstitution\",\n      \"pmids\": [\"36530986\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"METTL3-mediated m6A methylation of COL10A1 mRNA in cancer-associated fibroblasts (CAFs) stabilizes COL10A1 mRNA and increases its expression; COL10A1 secreted by CAFs promotes lung squamous cell carcinoma (LUSC) cell proliferation and suppresses apoptosis-induced oxidative stress.\",\n      \"method\": \"MeRIP (m6A sequencing), METTL3 knockdown, COL10A1 knockdown, in vitro functional assays, in vivo xenograft\",\n      \"journal\": \"Oxidative medicine and cellular longevity\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — MeRIP for direct m6A detection plus functional rescue experiments, single lab\",\n      \"pmids\": [\"36246404\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"COL10A1 directly interacts with P4HB (Prolyl 4-hydroxylase beta polypeptide) in breast cancer cells; knockdown of P4HB reverses the proliferation- and invasion-promoting effects of COL10A1 overexpression, placing COL10A1 upstream of P4HB in breast cancer progression.\",\n      \"method\": \"Co-immunoprecipitation, siRNA knockdown, CCK-8, wound healing, transwell assays\",\n      \"journal\": \"Medical science monitor\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 — single Co-IP plus functional rescue, single lab\",\n      \"pmids\": [\"33637669\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"miR-26b-5p from M2 macrophage-derived exosomes directly targets COL10A1 (confirmed by target-site mutation and dual-luciferase reporter assay), inhibiting chondrocyte hypertrophy induced by M1 macrophage-conditioned medium.\",\n      \"method\": \"Dual-luciferase reporter assay with target-site mutation, miRNA mimic transfection, in vitro chondrocyte hypertrophy assay, in vivo OA mouse model\",\n      \"journal\": \"Journal of nanobiotechnology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct target validation by luciferase reporter with site mutation, plus functional in vitro and in vivo assays\",\n      \"pmids\": [\"38374072\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"miR-26a-5p directly targets COL10A1 (validated by dual-luciferase reporter assay), and rescue experiments show that downregulation of COL10A1 reverses the inhibitory effect of miR-26a-5p overexpression on gastric cancer cell proliferation, migration, and invasion.\",\n      \"method\": \"Dual-luciferase reporter assay, siRNA knockdown, CCK-8, colony formation, transwell assays\",\n      \"journal\": \"European review for medical and pharmacological sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — luciferase target validation plus rescue experiment, single lab\",\n      \"pmids\": [\"32096148\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"DLX5 promotes Col10a1 expression in hypertrophic chondrocytes by directly interacting with the Col10a1 cis-enhancer, as demonstrated by dual-luciferase reporter and ChIP assays; DLX5 may cooperate with RUNX2 via adjacent binding sites within the enhancer.\",\n      \"method\": \"qRT-PCR, Western blot, dual-luciferase reporter assay, ChIP, forced expression and knockdown in chondrogenic cell models, murine OA model\",\n      \"journal\": \"Genes & diseases\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — ChIP and reporter assay with direct binding evidence, single lab\",\n      \"pmids\": [\"37492739\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"miR-218 directly targets COL10A1, MEF2C, and RUNX2 (confirmed by miR reporter assay in HEK293T and miR pulldown in human MSC); gain of miR-218 in human MSC attenuates hypertrophic markers including COL10A1, though WNT/β-catenin activation counteracts anti-hypertrophic effects.\",\n      \"method\": \"miRNA reporter assay, miR pulldown, western blot, functional differentiation assays in MSC and SaOS-2 cells\",\n      \"journal\": \"Stem cell research & therapy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct target validation by reporter assay and pulldown, plus functional assays, single lab\",\n      \"pmids\": [\"33303006\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Downregulation of carbonic anhydrase IX (Car9) in mouse primary chondrocytes induces Col10a1 expression in a HIF-2α-independent manner; this induction is modulated by the cAMP/PKA pathway, as it is augmented by a PKA inhibitor and suppressed by a phosphodiesterase inhibitor or cAMP analog.\",\n      \"method\": \"Car9 siRNA knockdown, Car9 forced expression, Epas1 siRNA (HIF-2α), pharmacological cAMP/PKA pathway manipulation, RT-PCR\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — multiple siRNA and pharmacological interventions in primary chondrocytes, single lab\",\n      \"pmids\": [\"23441228\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"TBX5 acts as a negative regulator of Col10a1: overexpression of Tbx5 decreases Col10a1 expression while knockdown increases it; in ColX-Tbx5 transgenic mice, Tbx5 overexpression decreased Col10a1 expression in limb tissue and caused mildly delayed ossification.\",\n      \"method\": \"qRT-PCR, Western blot, stable overexpression cell line, transgenic mouse generation, alkaline phosphatase staining\",\n      \"journal\": \"Frontiers in genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — in vitro and in vivo transgenic validation, single lab\",\n      \"pmids\": [\"34276786\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"DDX5 (DEAD-box helicase 5) acts as a positive transcriptional regulator of Col10a1 by directly interacting with the 150-bp Col10a1 cis-enhancer, as confirmed by ChIP and dual-luciferase reporter assay; Ddx5 knockdown reduces COL10A1 expression and impairs chondrocyte maturation (weaker alcian blue and ALP staining), and may cooperate with RUNX2.\",\n      \"method\": \"qRT-PCR, Western blot, dual-luciferase reporter assay, ChIP, stable Ddx5 knockdown ATDC5 cells, alcian blue/ALP/alizarin red staining\",\n      \"journal\": \"American journal of translational research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — ChIP and reporter assay confirm direct binding, functional differentiation assays, single lab\",\n      \"pmids\": [\"38715834\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"A COL10A1 p.W651fsX666 frameshift mutation produces mutant mRNA that undergoes NMD, yet the mutant protein also disrupts trimerization of normal collagen X in vitro (dominant-negative effect), demonstrating that both haploinsufficiency and dominant-negative mechanisms can co-exist for a single nonsense/frameshift mutation.\",\n      \"method\": \"In vitro trimerization analysis, mRNA stability assay, Sanger sequencing, family segregation analysis\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1-2 — in vitro trimerization reconstitution with quantitative analysis, single lab\",\n      \"pmids\": [\"40398448\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"KLF4 induces miR-101 transcription, and miR-101 in turn downregulates COL10A1 expression (dual-luciferase reporter validation); COL10A1 silencing inhibits EMT and renal fibrosis in ischemia-reperfusion injury models, placing COL10A1 downstream of KLF4/miR-101 axis.\",\n      \"method\": \"Dual-luciferase reporter assay, FISH, KLF4 overexpression, COL10A1 siRNA, ischemia-reperfusion mouse model, immunofluorescence\",\n      \"journal\": \"Renal failure\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — luciferase validation plus in vivo mouse model, single lab\",\n      \"pmids\": [\"38345033\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"COL10A1 directly interacts with INHBA and facilitates PI3K/AKT phosphorylation in prostate cancer cells; co-immunoprecipitation confirmed the COL10A1-INHBA interaction, and overexpression of COL10A1 promotes cancer cell proliferation, migration, and invasion through this axis.\",\n      \"method\": \"Co-immunoprecipitation, CCK-8, colony formation, flow cytometry, transwell, wound-healing assays, rescue experiments\",\n      \"journal\": \"Journal of cellular and molecular medicine\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 — single Co-IP for interaction, signaling pathway inferred from phosphorylation changes, single lab\",\n      \"pmids\": [\"39656597\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"COL10A1 knockdown in pancreatic adenocarcinoma cells decreases CD276 expression, and overexpression of CD276 reverses COL10A1 knockdown-induced repression of proliferation and migration, identifying CD276 as a downstream effector of COL10A1 in pancreatic cancer.\",\n      \"method\": \"siRNA knockdown, CCK-8, wound healing, transwell assays, western blot for CD276\",\n      \"journal\": \"BMC gastroenterology\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 — downstream target identified by rescue experiment without direct binding evidence, single lab\",\n      \"pmids\": [\"37974070\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"COL10A1 knockdown in HRMECs suppresses proliferation and tube formation under hypoxic conditions, and downregulates SNAIL1 and ANGPT2; intravitreal injection of anti-collagen X monoclonal antibody significantly reduces CNV leakage and lesion area in a mouse laser-induced CNV model.\",\n      \"method\": \"siRNA knockdown, proliferation and tube formation assays, anti-collagen X antibody injection in vivo, fundus fluorescein angiography, immunofluorescence\",\n      \"journal\": \"Microvascular research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — in vitro functional assays plus in vivo antibody-mediated loss-of-function, single lab\",\n      \"pmids\": [\"34520774\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"COL10A1 promotes colorectal cancer cell EMT and induces M2 macrophage polarization through the COL10A1/CD18/JAK1/STAT3 signaling axis; M2 macrophages in turn enhance COL10A1 expression in fibroblasts via TGF-β/RUNX2 pathway, forming a pro-tumorigenic feedback loop.\",\n      \"method\": \"Multi-omics integration (single-cell, bulk, spatial transcriptomics, proteomics), in vivo models, molecular pathway assays, drug screening\",\n      \"journal\": \"Journal of experimental & clinical cancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — multi-omics plus functional validation in vivo and in vitro, single lab\",\n      \"pmids\": [\"40826474\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1993,\n      \"finding\": \"The mouse Col10a1 gene has three exons and two introns spanning 7.0 kb, with alternative promoter usage and multiple transcription start sites; mRNA (~3.0 kb) is first expressed at E13.5, and in situ hybridization confirms restriction of Col10a1 expression to hypertrophic chondrocytes in growth cartilage.\",\n      \"method\": \"RNase protection assays, primer extension, RACE-PCR, in situ hybridization, RT-PCR, SDS-PAGE\",\n      \"journal\": \"European journal of biochemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — multiple direct molecular methods establishing gene structure and tissue-specific expression; foundational paper\",\n      \"pmids\": [\"8477738\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1991,\n      \"finding\": \"The human COL10A1 gene (encoding α1(X) collagen) was cloned and mapped to the q21-q22 region of chromosome 6 by in situ hybridization and somatic cell hybrid analysis.\",\n      \"method\": \"PCR with consensus primers, in situ hybridization of metaphase chromosomes, Southern analysis of human-hamster somatic cell hybrids\",\n      \"journal\": \"FEBS letters\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — direct chromosomal mapping by two independent methods; foundational localization paper\",\n      \"pmids\": [\"2037056\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"COL10A1 encodes the α1 chain of type X collagen, a homotrimeric short-chain collagen specifically produced by hypertrophic chondrocytes during endochondral ossification; its NC1 C-terminal domain mediates trimerization, and disease-causing mutations (MCDS/SMD) disrupt trimerization and/or trigger ER stress and UPR via misfolded protein retention, while transcription is controlled by a 150-bp cis-enhancer bound by Runx2 (required but not sufficient), cooperating factors (DLX5, DDX5, C/EBPβ via GADD45β/p38), and repressors (TBX5, miR-218, CpG methylation); in cancer contexts, COL10A1 signals through DDR2/FAK and DDR2/MEK/ERK axes to drive EMT, proliferation, and metastasis.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"COL10A1 encodes the α1 chain of type X collagen, a homotrimeric short-chain collagen whose expression is restricted to hypertrophic chondrocytes during endochondral ossification, where it serves as a hallmark marker of chondrocyte hypertrophy [PMID:8477738]. The C-terminal NC1 domain mediates chain trimerization; disease-causing missense mutations in this domain abolish trimer assembly, while nonsense/frameshift mutations can act through both nonsense-mediated mRNA decay (haploinsufficiency) and dominant-negative disruption of wild-type chain trimerization, with retained misfolded protein triggering ER stress and the unfolded protein response — collectively causing Schmid-type metaphyseal chondrodysplasia (MCDS) [PMID:15024737, PMID:15880705, PMID:17403716, PMID:30010889]. Transcription of COL10A1 in hypertrophic chondrocytes is driven by a 150-bp distal cis-enhancer requiring direct Runx2 binding together with cooperating factors DLX5 and DDX5, while GADD45β/p38/C/EBPβ signaling activates the proximal promoter and SOX9 provides additional transcriptional input; epigenetic silencing occurs via promoter CpG methylation, and miR-218, miR-26b-5p, and miR-101 post-transcriptionally repress COL10A1 [PMID:21887706, PMID:37492739, PMID:38715834, PMID:20048163, PMID:18759285, PMID:33303006]. In cancer contexts, secreted collagen X signals through DDR2 to activate FAK and MEK/ERK pathways, promoting epithelial–mesenchymal transition, proliferation, and metastasis across multiple carcinoma types [PMID:33324550, PMID:36530986, PMID:30154451].\",\n  \"teleology\": [\n    {\n      \"year\": 1991,\n      \"claim\": \"Establishing the genomic identity and chromosomal location of COL10A1 was a prerequisite for subsequent mutation and regulatory studies.\",\n      \"evidence\": \"PCR cloning, in situ hybridization, and somatic cell hybrid analysis mapped COL10A1 to human chromosome 6q21-q22\",\n      \"pmids\": [\"2037056\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Exon-intron structure of the human gene was not determined in this study\", \"No functional data on protein product\"]\n    },\n    {\n      \"year\": 1993,\n      \"claim\": \"Defining the gene structure and proving hypertrophic chondrocyte-restricted expression established COL10A1 as the definitive marker of chondrocyte hypertrophy during endochondral ossification.\",\n      \"evidence\": \"RNase protection, primer extension, RACE-PCR, and in situ hybridization in mouse embryos showed three-exon gene structure and expression restricted to hypertrophic cartilage from E13.5\",\n      \"pmids\": [\"8477738\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Cis-regulatory elements controlling tissue specificity were not identified\", \"No protein-level functional characterization\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Demonstrating that MCDS-associated NC1 domain mutations abolish trimerization identified the molecular mechanism underlying disease pathogenesis.\",\n      \"evidence\": \"In vitro coupled transcription/translation and SDS-PAGE showed that Y582D, Y598D, and Q653P mutant α1(X) chains fail to form SDS-stable trimers\",\n      \"pmids\": [\"15024737\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether disrupted trimerization causes ER retention and cellular stress was not yet tested\", \"In vivo phenotypic consequences of individual mutations were not modeled\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Establishing that nonsense mutations undergo NMD while missense mutations disrupt trimerization revealed two distinct pathogenic mechanisms — haploinsufficiency and dominant-negative — converging on MCDS.\",\n      \"evidence\": \"In vitro assembly assays and patient cartilage mRNA analysis showed NMD of nonsense mutant mRNA versus trimerization failure of missense mutant protein\",\n      \"pmids\": [\"15880705\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether a single mutation could engage both mechanisms simultaneously was unknown\", \"In vivo modeling of NMD versus dominant-negative effects was lacking\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Proving that truncated mutant chains are retained in the ER and trigger UPR established ER stress as a central cellular pathogenic event in MCDS, beyond simple loss of extracellular collagen X.\",\n      \"evidence\": \"Transgenic FCdel mice expressing a frameshift COL10A1 mutant showed ER retention, UPR activation, and dosage-dependent growth plate disruption\",\n      \"pmids\": [\"17403716\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether pharmacological modulation of ER stress could rescue the phenotype was untested\", \"Relative contributions of ER stress versus extracellular matrix deficiency to MCDS remained unclear\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Identifying CpG methylation-based silencing of COL10A1 in non-hypertrophic chondrocytes revealed an epigenetic layer of tissue-specific gene regulation.\",\n      \"evidence\": \"Bisulfite sequencing and COBRA showed specific CpG sites methylated in articular chondrocytes (no COL10A1 expression) and demethylated during MSC chondrogenesis (COL10A1 on)\",\n      \"pmids\": [\"18759285\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether methylation changes are causative or correlative was not functionally tested with demethylating agents at specific sites\", \"Identity of methyltransferases/demethylases involved was unknown\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Two advances defined transcriptional control: Runx2 was shown to be necessary but not sufficient at the distal enhancer, and GADD45β/p38/C/EBPβ signaling was identified as an independent activating pathway at the proximal promoter, establishing a multi-input transcriptional logic for COL10A1.\",\n      \"evidence\": \"Transgenic mice with mutated Runx2 sites in the 150-bp enhancer lost reporter expression; dominant-negative p38 blocked GADD45β/C/EBPβ-mediated transactivation in reporter and ChIP assays\",\n      \"pmids\": [\"21887706\", \"20048163\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Cooperating factors at the 150-bp enhancer besides Runx2 were not yet identified\", \"How the proximal promoter and distal enhancer signals are integrated was unclear\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Identifying a broader set of transcription factors (AP1, MEF2, NFAT, Runx1, TBX5, Cox-2) at the 150-bp enhancer suggested a multi-protein regulatory complex centered on Runx2.\",\n      \"evidence\": \"Yeast one-hybrid screen, mass spectrometry, EMSA, and ChIP confirmed Cox-2 direct binding to the enhancer\",\n      \"pmids\": [\"25321476\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Functional requirement of each factor was not individually tested in vivo\", \"Stoichiometry and assembly order of the enhancer complex were unknown\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Pharmacological rescue of MCDS by carbamazepine-stimulated proteolysis of ER-retained mutant collagen X demonstrated that ER stress is a druggable pathogenic mechanism, validating the UPR model.\",\n      \"evidence\": \"Col10a1 p.Y632X knock-in mice treated with carbamazepine showed reduced ER stress markers, restored growth plate architecture, and increased bone growth\",\n      \"pmids\": [\"30010889\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Long-term safety and efficacy in patients not established\", \"Whether carbamazepine acts specifically on collagen X versus general ER proteostasis was unclear\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Demonstrating that SOX9 directly activates COL10A1 transcription and that COL10A1 promotes EMT via SOX9-dependent mechanisms in gastric cancer revealed a previously unrecognized extracellular signaling role for collagen X beyond the growth plate.\",\n      \"evidence\": \"EMSA, ChIP, and promoter reporter assays in gastric cancer cells; SOX9 knockdown abolished COL10A1-driven EMT; nude mouse metastasis assays\",\n      \"pmids\": [\"30154451\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Receptor mediating COL10A1 signaling in gastric cancer was not identified in this study\", \"Relevance to in vivo human cancer progression was correlative\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Identification of DDR2 as the receptor for COL10A1 signaling through FAK established a molecular mechanism for collagen X-driven cancer cell proliferation and invasion.\",\n      \"evidence\": \"Co-immunoprecipitation of COL10A1 and DDR2 in lung adenocarcinoma cells; COL10A1 manipulation modulated DDR2 and FAK phosphorylation\",\n      \"pmids\": [\"33324550\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct binding domain mapping between COL10A1 and DDR2 was not performed\", \"Whether DDR2 mediates COL10A1 signaling in non-cancer hypertrophic chondrocytes was untested\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Identification of miR-218 and TBX5 as negative regulators of COL10A1 demonstrated that hypertrophic differentiation is controlled by a balance of activators and repressors converging on COL10A1.\",\n      \"evidence\": \"miR-218 reporter assay and pulldown confirmed direct targeting of COL10A1; TBX5 overexpression in transgenic mice decreased Col10a1 and delayed ossification\",\n      \"pmids\": [\"33303006\", \"34276786\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Physiological contexts in which TBX5 and miR-218 are activated to suppress hypertrophy were not defined\", \"Interaction between TBX5 repression and enhancer-bound activators was not resolved\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Extension of DDR2-mediated signaling to MEK/ERK in pancreatic cancer, and discovery of m6A-mediated COL10A1 mRNA stabilization in cancer-associated fibroblasts, broadened the oncogenic mechanisms of COL10A1 beyond cell-autonomous DDR2/FAK signaling.\",\n      \"evidence\": \"MEK/ERK pathway analysis upon COL10A1 manipulation in pancreatic cancer cells; MeRIP-seq identified METTL3-dependent m6A on COL10A1 mRNA in CAFs promoting mRNA stability\",\n      \"pmids\": [\"36530986\", \"36246404\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Specific m6A sites on COL10A1 mRNA were not individually validated\", \"Whether DDR2-dependent signaling is the sole effector pathway in all cancer types was unclear\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Identification of DLX5 as a direct activator at the Col10a1 enhancer began to resolve which cooperating factors partner with Runx2 to achieve hypertrophic specificity.\",\n      \"evidence\": \"ChIP and dual-luciferase reporter assays showed DLX5 binding to the 150-bp enhancer; DLX5 knockdown reduced Col10a1 expression\",\n      \"pmids\": [\"37492739\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether DLX5 and Runx2 physically interact at the enhancer was not demonstrated\", \"Sufficiency of DLX5 plus Runx2 for hypertrophic specificity was not tested in vivo\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"DDX5 was identified as another direct transcriptional activator at the Col10a1 enhancer, further populating the enhancer-bound complex model and linking RNA helicase activity to COL10A1 regulation.\",\n      \"evidence\": \"ChIP and dual-luciferase reporter assays in ATDC5 cells; Ddx5 knockdown reduced COL10A1 expression and impaired chondrocyte maturation markers\",\n      \"pmids\": [\"38715834\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether DDX5 acts via its helicase activity or as a transcriptional coactivator was not distinguished\", \"Combinatorial requirement of DDX5, DLX5, and Runx2 was not tested\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Demonstration that a single frameshift mutation can simultaneously undergo NMD and exert dominant-negative effects on trimerization unified the previously dichotomous haploinsufficiency versus dominant-negative models of MCDS pathogenesis.\",\n      \"evidence\": \"In vitro trimerization assay and mRNA stability analysis of COL10A1 p.W651fsX666 from an MCDS family\",\n      \"pmids\": [\"40398448\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"In vivo confirmation of dual mechanism in an animal model was not provided\", \"Relative contribution of each mechanism to disease severity is unknown\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"The full combinatorial logic of the 150-bp enhancer complex (how Runx2, DLX5, DDX5, and other factors are assembled and coordinated), the structural basis of COL10A1-DDR2 interaction, and whether collagen X has signaling functions in normal physiology beyond the growth plate remain unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No structural model of the enhancer-bound transcription factor complex exists\", \"Crystal structure of COL10A1 interaction with DDR2 has not been solved\", \"Whether collagen X has physiological signaling roles outside cartilage and cancer is untested\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0005198\", \"supporting_discovery_ids\": [5, 6, 7, 27]},\n      {\"term_id\": \"GO:0048018\", \"supporting_discovery_ids\": [10, 11, 26]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005576\", \"supporting_discovery_ids\": [4, 6, 12, 27]},\n      {\"term_id\": \"GO:0005783\", \"supporting_discovery_ids\": [4, 8]},\n      {\"term_id\": \"GO:0031012\", \"supporting_discovery_ids\": [27]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-1474244\", \"supporting_discovery_ids\": [5, 6, 7, 27]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [0, 2, 27]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [10, 11, 26]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [4, 5, 6, 8]}\n    ],\n    \"complexes\": [\n      \"Type X collagen homotrimer\"\n    ],\n    \"partners\": [\n      \"RUNX2\",\n      \"DDR2\",\n      \"DLX5\",\n      \"DDX5\",\n      \"SOX9\",\n      \"CEBPB\",\n      \"TBX5\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}