{"gene":"WNT10B","run_date":"2026-04-28T23:00:23","timeline":{"discoveries":[{"year":2005,"finding":"Wnt10b shifts mesenchymal precursor cell fate toward the osteoblast lineage by inducing osteoblastogenic transcription factors Runx2, Dlx5, and osterix, and suppressing adipogenic transcription factors C/EBPα and PPARγ, acting through canonical Wnt/β-catenin signaling. Wnt10b-/- mice have decreased trabecular bone and serum osteocalcin, confirming its endogenous role in bone formation.","method":"Transgenic mouse overexpression (FABP4-Wnt10b), Wnt10b-/- knockout mice, pharmacological and genetic approaches (β-catenin manipulation), gene expression analysis","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 2 — reciprocal gain/loss-of-function in vivo with specific transcription factor readouts, replicated across multiple approaches","pmids":["15728361"],"is_preprint":false},{"year":2004,"finding":"Wnt10b inhibits development of both white and brown adipose tissue in vivo; transgenic expression from the FABP4 promoter blocks adipogenesis throughout the body, reduces total body fat ~50%, and prevents diet-induced obesity, demonstrating Wnt10b is a physiological regulator of adipogenesis.","method":"FABP4-Wnt10b transgenic mice, body composition analysis, histology, metabolic measurements","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 — clean in vivo transgenic model with multiple phenotypic readouts, foundational study","pmids":["15190075"],"is_preprint":false},{"year":2011,"finding":"Wnt10b (and Wnt6 and Wnt10a) inhibit adipogenesis and stimulate osteoblastogenesis exclusively through a β-catenin-dependent mechanism; knockdown of β-catenin completely abolishes these effects of all three Wnt ligands in bipotential ST2 mesenchymal cells.","method":"Gain- and loss-of-function in ST2 and 3T3-L1 cells, β-catenin knockdown, differentiation assays","journal":"Bone","confidence":"High","confidence_rationale":"Tier 2 — multiple orthogonal gain/loss-of-function approaches; β-catenin requirement demonstrated by epistasis","pmids":["21872687"],"is_preprint":false},{"year":2009,"finding":"Intermittent PTH increases Wnt10b production by bone marrow CD8+ T cells, which then activates canonical Wnt signaling in preosteoblasts to stimulate osteoblastic commitment, proliferation, differentiation, and life span; T-cell-null mice and mice lacking T-cell-produced Wnt10b show no anabolic response to iPTH.","method":"T cell-null mice, conditional Wnt10b knockout (T-cell-specific), iPTH treatment, bone histomorphometry, Wnt reporter assays","journal":"Cell metabolism","confidence":"High","confidence_rationale":"Tier 2 — genetic epistasis with T-cell-specific Wnt10b deletion and T cell-null mice, multiple bone formation readouts","pmids":["19723499"],"is_preprint":false},{"year":2005,"finding":"In myoblasts, Wnt10b deficiency increases adipogenic potential and promotes coexpression of myogenic and adipogenic programs; decreased Wnt10b in aged myoblasts contributes to excessive lipid accumulation. Mimicking Wnt signaling via Wnt10b overexpression or GSK3 inhibition restores myogenic differentiation and suppresses adipogenic gene expression.","method":"Wnt10b-/- mice, overexpression in aged myoblasts, GSK-3 inhibition, in vitro differentiation assays, in vivo muscle regeneration","journal":"Molecular biology of the cell","confidence":"High","confidence_rationale":"Tier 2 — null mice plus overexpression rescue, multiple differentiation readouts in vitro and in vivo","pmids":["15673614"],"is_preprint":false},{"year":1997,"finding":"Overexpression of Wnt10b in the mouse mammary gland via MMTV promoter causes hypermorphic mammary gland development (precocious alveologenesis, ductal branching in males) and high susceptibility to mammary adenocarcinoma; co-expression with FGF-3/int-2 causes a potent synergistic interaction, indicating Wnt10b is a proto-oncogene that cooperates with FGF signaling.","method":"MMTV-Wnt10b transgenic mice, MMTV-Wnt10b × MMTV-FGF-3 crosses, histology, tumor incidence","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 2 — clean transgenic gain-of-function in vivo with defined mammary phenotypes and oncogenic cooperation","pmids":["9393971"],"is_preprint":false},{"year":2007,"finding":"Osteoblast-specific overexpression of Wnt10b (from osteocalcin promoter) increases bone mass primarily by stimulating osteoblastogenesis, specifically increasing osteoblast number per bone surface, mineral apposition rate, and mineralizing surface, without altering pre-osteoblast proliferation, osteoblast apoptosis, or osteoclast number; Wnt10b-/- mice show reduced bone formation rate.","method":"Oc-Wnt10b transgenic mice, Wnt10b-/- mice, μCT, histomorphometry, BrdU, TUNEL, TRACP5b assays","journal":"Journal of bone and mineral research","confidence":"High","confidence_rationale":"Tier 2 — complementary gain and loss of function with specific cellular mechanism identified by histomorphometry","pmids":["17708715"],"is_preprint":false},{"year":2010,"finding":"Wnt10b is required for maintenance of adult bone density and mesenchymal progenitor cells (MPCs); Wnt10b-null mice show progressive age-dependent loss of trabecular bone associated with reduction in bone marrow-derived MPC number and decreased osteoblast differentiation marker expression.","method":"Wnt10b-null mice, μCT, bone histomorphometry, colony-forming unit assays, osteogenic gene expression in primary BMSCs","journal":"Journal of bone and mineral research","confidence":"High","confidence_rationale":"Tier 2 — complete null mice with multiple quantitative bone and progenitor cell readouts","pmids":["20499361"],"is_preprint":false},{"year":2013,"finding":"WNT10B activates canonical β-catenin signaling leading to transcriptional upregulation of HMGA2 in triple-negative breast cancer (TNBC); HMGA2 is necessary and sufficient for WNT10B-driven proliferation; HMGA2 and EZH2 displace Groucho/TLE1 from TCF-4 and mediate K49 acetylation on β-CATENIN required for transcription.","method":"ChIP analysis, siRNA knockdown, WNT/β-catenin pathway modulators, MMTV-Wnt10b transgenic tumors, luciferase reporter, Hmga2 haploinsufficiency mouse model","journal":"EMBO molecular medicine","confidence":"High","confidence_rationale":"Tier 2 — ChIP demonstrates direct transcriptional mechanism; multiple orthogonal methods including in vivo genetic model","pmids":["23307470"],"is_preprint":false},{"year":2018,"finding":"Butyrate-induced expansion of regulatory T (Treg) cells promotes Treg-CD8+ T cell interaction, leading to increased Wnt10b secretion by CD8+ T cells; mechanistically, Treg cells drive assembly of a NFAT1-SMAD3 transcription complex in CD8+ T cells, which drives Wnt10b expression and bone anabolism.","method":"Germ-free mouse models, LGG probiotic/butyrate supplementation, TCRβ-/- reconstitution with Wnt10b-/- CD8+ T cells, Treg cell depletion, transcription factor complex analysis","journal":"Immunity","confidence":"High","confidence_rationale":"Tier 2 — genetic rescue experiments with Wnt10b-/- T cells and Treg depletion, mechanistic transcription complex identified","pmids":["30446387"],"is_preprint":false},{"year":2012,"finding":"miR-148a directly targets the 3'-UTR of WNT10B mRNA in cancer-associated fibroblasts; silencing of miR-148a in CAFs increases WNT10B protein levels and stimulates migration of endometrial cancer cells through Wnt/β-catenin pathway activation.","method":"3'-UTR luciferase reporter assay, lentiviral miR-148a overexpression, conditioned medium migration assays, SuperTOPFlash reporter","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 2 — direct 3'-UTR target validation by luciferase reporter plus functional rescue experiments","pmids":["22890324"],"is_preprint":false},{"year":2013,"finding":"TGF-β1 stimulates Wnt10b production in osteoclasts through Smad2/3 activation (independent of AKT or MAPK), which then promotes osteoblast mineralization; blocking Wnt10b activity with DKK1 suppresses TGF-β-treated osteoclast-conditioned medium-induced mineralization.","method":"Osteoclast-conditioned medium, DKK1 inhibition, Smad2/3 signaling blockade, mineralization assays","journal":"Endocrinology","confidence":"High","confidence_rationale":"Tier 2 — Smad pathway epistasis with specific pathway inhibitors and functional mineralization readout","pmids":["23861379"],"is_preprint":false},{"year":2014,"finding":"The Scl-independent bone anabolic activity of intermittent PTH is mediated specifically by T-cell-produced Wnt10b; combined Scl-Ab and iPTH treatment is equally effective as Scl-Ab alone in T-cell-null and T-cell-specific Wnt10b-knockout mice, demonstrating epistatic relationship.","method":"T-cell-null mice, T-cell-specific Wnt10b-/- mice, anti-sclerostin antibody, iPTH treatment, bone densitometry, histomorphometry","journal":"Journal of bone and mineral research","confidence":"High","confidence_rationale":"Tier 2 — genetic epistasis with T-cell-specific conditional KO and pharmacological tools","pmids":["24357520"],"is_preprint":false},{"year":2017,"finding":"Fibroblast-derived exosomes (FD exosomes) mobilize autocrine Wnt10b toward lipid rafts, activating the mTOR pathway via GSK3β and TSC2; Wnt10b-deleted animals show strongly reduced axonal regeneration after optic nerve injury in response to FD exosomes, establishing an autocrine Wnt10b-mTOR pathway for CNS axonal regeneration.","method":"Wnt10b-deleted mice, FD exosome application, optic nerve crush model, lipid raft fractionation, mTOR/GSK3β/TSC2 pathway analysis","journal":"Cell reports","confidence":"High","confidence_rationale":"Tier 2 — genetic KO with in vivo nerve injury model and biochemical pathway analysis","pmids":["28683327"],"is_preprint":false},{"year":2006,"finding":"A naturally occurring missense mutation C256Y in WNT10B abrogates the ability of WNT10B to activate canonical Wnt signaling and block adipogenesis, establishing that WNT10B canonical signaling activity is required for its anti-adipogenic function in humans.","method":"Functional assay of canonical Wnt signaling activity and adipogenesis inhibition for naturally occurring human WNT10B missense variants","journal":"Diabetologia","confidence":"High","confidence_rationale":"Tier 1 — structure-function mutagenesis via naturally occurring human variant with direct functional assay","pmids":["16477437"],"is_preprint":false},{"year":2012,"finding":"Wnt10b overexpression induces hair follicle regeneration by switching follicles from telogen to anagen via canonical Wnt signaling; β-catenin translocates to the nucleus in Wnt10b-induced follicles; knockdown of β-catenin abrogates Wnt10b's biological effects on hair follicle cycling.","method":"Adenovirus-mediated Wnt10b overexpression, siRNA knockdown of Wnt10b and β-catenin, in vivo mouse intradermal injection model, histology","journal":"The Journal of investigative dermatology","confidence":"High","confidence_rationale":"Tier 2 — gain and loss of function in vivo with β-catenin epistasis","pmids":["22832493"],"is_preprint":false},{"year":2011,"finding":"Wnt10b activates canonical Wnt, NFκB, and Notch signaling pathways in U2OS osteosarcoma cells; Wnt3a fails to induce NFκB and Notch activation, demonstrating Wnt10b-specific activity beyond canonical Wnt/β-catenin signaling.","method":"Stable Wnt10b-expressing U2OS cell line, microarray, NFκB and Notch reporter assays, gene expression analysis","journal":"Journal of cellular biochemistry","confidence":"Medium","confidence_rationale":"Tier 2 — reporter assays confirm pathway activation, but single cell line system","pmids":["21321991"],"is_preprint":false},{"year":2015,"finding":"WNT10B promotes proliferation of human corneal endothelial cells through simultaneous β-catenin-dependent and β-catenin-independent pathways; specifically, WNT10B causes nuclear transport and binding of both RAC1 and β-catenin, leading to Cyclin D1 expression.","method":"Wnt10b overexpression in human corneal endothelial cells, nuclear fractionation, RAC1 and β-catenin co-localization, Cyclin D1 reporter, proliferation assay","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2 — identifies dual β-catenin-dependent and -independent mechanism with RAC1 as novel effector; single cell type system","pmids":["26370090"],"is_preprint":false},{"year":2013,"finding":"Ovariectomy-induced estrogen deficiency expands short-term hematopoietic stem and progenitor cells (ST-HSPCs) through T-cell expression of CD40L, which stimulates T-cell production of Wnt10b; Wnt10b then activates Wnt signaling in HSPCs. Ovariectomy fails to expand ST-HSPCs in CD40L-null mice and in animals lacking global or T-cell expression of Wnt10b.","method":"CD40L-null mice, global and T-cell-specific Wnt10b-/- mice, bone marrow transplantation, HSPC flow cytometry","journal":"Blood","confidence":"High","confidence_rationale":"Tier 2 — genetic epistasis using multiple null mouse models with quantitative HSPC readouts","pmids":["23954891"],"is_preprint":false},{"year":2016,"finding":"XBP1s directly induces transcription of microRNA-148a, which in turn binds the 3'-UTR of Wnt10b mRNA and mediates silencing of Wnt10b during adipogenic differentiation of 3T3-L1 cells, establishing an XBP1s→miR-148a→Wnt10b regulatory axis.","method":"XBP1s knockdown/overexpression, miR-148a 3'-UTR reporter assay, ChIP for XBP1s at miR-148a promoter, point mutation analysis, mRNA stability assays","journal":"Experimental & molecular medicine","confidence":"High","confidence_rationale":"Tier 2 — direct ChIP and reporter assays with point mutation validation establish mechanistic chain","pmids":["27055562"],"is_preprint":false},{"year":2013,"finding":"XBP1 directly binds to the Wnt10b promoter and suppresses Wnt10b expression during 3T3-L1 preadipocyte differentiation, leading to decreased β-catenin signaling; XBP1 and Wnt10b show reciprocal expression patterns during early adipogenesis.","method":"XBP1 overexpression/knockdown, ChIP for XBP1 at Wnt10b promoter, β-catenin activity assays, expression profiling during adipogenesis","journal":"FEBS letters","confidence":"Medium","confidence_rationale":"Tier 2 — direct ChIP establishes binding; single cell type system","pmids":["23603388"],"is_preprint":false},{"year":2013,"finding":"Hypoxia-inducible factor-2α (HIF-2α), but not HIF-1α, directly binds the Wnt10b enhancer region and drives Wnt10b expression under hypoxia in adipogenic cells; HIF-2α-deficient adipogenic cells fail to upregulate Wnt10b under hypoxia, and hypoxia-conditioned medium inhibits adipogenesis through canonical Wnt signaling.","method":"ChIP for HIF-2α at Wnt10b enhancer, HIF-2α-deficient adipogenic cells, hypoxia-conditioned medium experiments, β-catenin reporter assays","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 — direct ChIP for HIF-2α at Wnt10b enhancer with HIF-2α-deficient cell confirmation","pmids":["23900840"],"is_preprint":false},{"year":2019,"finding":"NSD1 histone methyltransferase activates Wnt10b expression by mediating H3K36me2 methylation at the Wnt10b locus; NSD1 knockout promotes H3K27me3 and reduces H3K36me2 at the Wnt10b gene, suppressing its expression and thereby inactivating the Wnt/β-catenin pathway in HCC cells.","method":"CRISPR/Cas9 NSD1 knockout, ChIP for H3K27me3 and H3K36me2 at Wnt10b, proliferation/invasion assays, xenograft model","journal":"Journal of experimental & clinical cancer research","confidence":"High","confidence_rationale":"Tier 2 — ChIP directly demonstrates epigenetic control of Wnt10b locus by NSD1; confirmed in vivo","pmids":["31727171"],"is_preprint":false},{"year":2017,"finding":"MAT2A interacts with EZH2 and MafK, is recruited to the Wnt10b promoter, and represses Wnt10b expression by promoting H3K27 methylation; this Wnt10b suppression inhibits Wnt/β-catenin signaling to promote adipogenesis. MAT2A catalytic activity and its interaction with MAT2B are required for Wnt10b repression.","method":"ChIP for MAT2A and H3K27me3 at Wnt10b promoter, co-IP for MAT2A/EZH2/MafK interaction, MAT2A overexpression/knockdown, MATII enzyme inhibition","journal":"Biochimica et biophysica acta. Molecular and cell biology of lipids","confidence":"High","confidence_rationale":"Tier 2 — ChIP and co-IP with enzymatic inhibition establish epigenetic mechanism at Wnt10b locus","pmids":["29133280"],"is_preprint":false},{"year":2020,"finding":"Wnt10b-GSK3β-driven autocrine canonical Wnt/LRP6 signaling is required for proper mitotic microtubule dynamics and faithful chromosome segregation in human somatic cells; inhibition of LRP6 signaling causes increased GSK3β activity, abnormal microtubule growth rates in mitotic spindles, and aneuploidy; Wnt10b is the specific Wnt ligand required for this Wnt/STOP function.","method":"LRP6/Wnt10b inhibition, microtubule dynamics measurement in mitosis, chromosome segregation analysis, Wnt10b knockdown in human somatic cells","journal":"Life science alliance","confidence":"High","confidence_rationale":"Tier 2 — specific KD of Wnt10b with quantitative mitotic phenotype; identifies novel Wnt10b-GSK3β-STOP pathway","pmids":["33257473"],"is_preprint":false},{"year":2021,"finding":"PTEN reduces BMP9-induced osteogenic differentiation by decreasing Wnt10b expression; BMP9 signals through PI3K/CREB and Smad1/5/9, whose interaction drives Wnt10b transcription; p-CREB and p-Smad1/5/9 are both enriched at the Wnt10b promoter; PTEN disrupts this CREB-BMP/Smad interaction, reducing Wnt10b and osteogenesis.","method":"ChIP for p-CREB and p-Smad1/5/9 at Wnt10b promoter, co-IP for CREB/Smad interaction, PI3K inhibitor, rapamycin, PTEN and Wnt10b knockdown, MSC osteogenic assays, xenograft bone formation","journal":"Frontiers in cell and developmental biology","confidence":"High","confidence_rationale":"Tier 2 — ChIP and co-IP demonstrate direct transcriptional mechanism for Wnt10b regulation; confirmed in vivo","pmids":["33614622"],"is_preprint":false},{"year":2017,"finding":"Low expression of p85α in stromal fibroblasts leads to paracrine WNT10B transport via exosomes to breast cancer epithelial cells, promoting cancer progression through epithelial-to-mesenchymal transition (EMT) via the canonical Wnt pathway.","method":"p85α knockdown in fibroblasts, exosome isolation and characterization, co-culture systems, EMT marker analysis, canonical Wnt pathway reporter","journal":"Oncogene","confidence":"Medium","confidence_rationale":"Tier 3 — exosome-mediated transport identified; single lab but multiple readouts","pmids":["28394344"],"is_preprint":false},{"year":2015,"finding":"Wnt10b gain-of-function in cardiomyocytes after myocardial infarction stimulates VEGFR2 expression in endothelial cells and angiopoietin-1 in vascular smooth muscle cells through NF-κB activation, coordinating arteriole formation and reducing fibrosis.","method":"Wnt10b gain-of-function mouse line, coronary artery ligation/cryoinjury models, NF-κB activation assay, VEGFR2/angiopoietin-1 expression analysis, histology","journal":"Circulation research","confidence":"Medium","confidence_rationale":"Tier 2 — in vivo gain-of-function with mechanistic pathway identification; single lab","pmids":["26338900"],"is_preprint":false},{"year":2016,"finding":"WNT10B mutations associated with oligodontia (e.g., R211Q, P190R, W262*, F284C) cannot normally enhance canonical Wnt signaling in TOPFlash reporter assays and cannot efficiently induce endothelial differentiation of dental pulp stem cells, establishing that WNT10B canonical signaling is required for tooth development.","method":"TOPFlash luciferase reporter assay for canonical Wnt signaling, endothelial differentiation assay of dental pulp stem cells with mutant WNT10B ligands, Sanger sequencing, whole-exome sequencing","journal":"American journal of human genetics","confidence":"Medium","confidence_rationale":"Tier 2 — functional assay of multiple natural human mutants demonstrates required canonical signaling activity","pmids":["27321946"],"is_preprint":false},{"year":2022,"finding":"BMI1 epigenetically represses Wnt10b expression in spermatogonial stem cells (SSCs) by increasing H2AK119ub and reducing H3K4me3 at the Wnt10b locus; BMI1 inhibition causes transcriptional activation of Wnt10b and nuclear translocation of β-catenin, impairing SSC maintenance; suppression of Wnt/β-catenin signaling rescues SSC maintenance in BMI1-deficient SSCs.","method":"BMI1 knockout mouse model, ChIP for H2AK119ub and H3K4me3 at Wnt10b locus, β-catenin localization, Wnt/β-catenin inhibitor rescue experiments","journal":"International journal of biological sciences","confidence":"High","confidence_rationale":"Tier 2 — ChIP demonstrates epigenetic control of Wnt10b by BMI1; genetic rescue with Wnt inhibitor confirms epistasis in vivo","pmids":["35541907"],"is_preprint":false},{"year":2007,"finding":"WNT10B exhibits a functional dualism: it up-regulates β-catenin/Tcf activity (canonical Wnt signaling), but also independently suppresses cell growth and anchorage-independent growth through a β-catenin/Tcf-independent mechanism; FGF signaling switches WNT10B from growth suppressor to growth promoter. WNT10B promoter is aberrantly methylated and silenced in 46% of primary HCC.","method":"β-catenin/Tcf reporter assay, dominant-negative TCF-4, β-catenin mutant transduction, growth assays, 5-aza-2'deoxycytidine reactivation, FGF co-treatment","journal":"Molecular biology of the cell","confidence":"Medium","confidence_rationale":"Tier 2 — multiple functional approaches identify dual β-catenin-dependent and -independent mechanisms","pmids":["17761539"],"is_preprint":false},{"year":2011,"finding":"Leucine-rich amelogenin peptide (LRAP) promotes osteogenesis over adipogenesis in mesenchymal stem cells through upregulation of Wnt10b expression; Wnt10b knockdown by siRNA abrogates the osteogenic effect of LRAP, and a Wnt inhibitor (sFRP-1) abolishes LRAP's effects, placing Wnt10b downstream of LRAP in the canonical Wnt signaling pathway.","method":"ST2 cell overexpression and Wnt10b siRNA knockdown, sFRP-1 treatment, osteogenesis and adipogenesis assays","journal":"Biomaterials","confidence":"Medium","confidence_rationale":"Tier 3 — epistasis by siRNA KD in cell line; single lab","pmids":["21663957"],"is_preprint":false},{"year":2019,"finding":"Sinusoidal electromagnetic fields promote osteogenic differentiation of osteoblasts through activation of the Wnt10b/β-catenin pathway in a manner dependent on the functional integrity of primary cilia; Wnt10b is localized at the base of primary cilia and is released upon SEMF treatment; siRNA knockdown of IFT88 (abrogating primary cilia) blocks SEMF-induced Wnt10b/β-catenin activation.","method":"siRNA knockdown of IFT88 and Wnt10b, immunofluorescence for primary cilia and Wnt10b localization, osteogenic differentiation assays, in vivo rat model with μCT","journal":"Journal of bone and mineral research","confidence":"Medium","confidence_rationale":"Tier 2 — subcellular localization tied to functional consequence via IFT88 KD epistasis; single lab","pmids":["30779853"],"is_preprint":false},{"year":2003,"finding":"In zebrafish, wnt1 and wnt10b function redundantly to maintain threshold levels of Pax2.1 and Fgf8 at the midbrain-hindbrain boundary (MHB); double deletion of both loci causes loss of pax2.1, en2, and her5 expression in the ventral MHB without affecting fgf8, en3, wnt8b, or wnt3a.","method":"Zebrafish wnt1-wnt10b deficiency allele, morpholino antisense knockdown, in situ hybridization, genetic epistasis with pax2.1 and fgf8 mutants","journal":"Developmental biology","confidence":"High","confidence_rationale":"Tier 2 — genetic deficiency allele combined with morpholino knockdown and epistasis; functional phenotype at MHB","pmids":["12591239"],"is_preprint":false}],"current_model":"WNT10B is a secreted canonical Wnt ligand that activates β-catenin/TCF-mediated transcription to control mesenchymal stem cell fate (promoting osteoblastogenesis and inhibiting adipogenesis by inducing Runx2/Dlx5/osterix and suppressing C/EBPα/PPARγ), drives hair follicle cycling, and acts in a paracrine/autocrine manner (including via exosomes) with tissue-specific upstream regulators (including PTH-stimulated CD8+ T cells, TGF-β in osteoclasts, HIF-2α, XBP1s→miR-148a, BMI1, and NSD1/MAT2A epigenetic complexes) and downstream effectors (HMGA2/EZH2 in breast cancer, RAC1 in corneal endothelium, mTOR/GSK3β in axon regeneration, and GSK3β-STOP pathway for mitotic fidelity), while certain contexts reveal β-catenin-independent activities including NF-κB and Notch pathway activation."},"narrative":{"teleology":[{"year":1997,"claim":"Whether WNT10B had oncogenic potential was unknown; transgenic mammary overexpression established it as a proto-oncogene that cooperates with FGF signaling to drive mammary adenocarcinoma.","evidence":"MMTV-Wnt10b transgenic mice and MMTV-Wnt10b × MMTV-FGF-3 crosses with tumor incidence analysis","pmids":["9393971"],"confidence":"High","gaps":["Mechanism of FGF–WNT10B oncogenic cooperation undefined","Downstream intracellular signaling in mammary tumors uncharacterized at this stage"]},{"year":2003,"claim":"Whether wnt10b had roles in embryonic patterning was unknown; zebrafish studies showed that wnt1 and wnt10b function redundantly to maintain Pax2.1 expression at the midbrain-hindbrain boundary.","evidence":"Zebrafish wnt1-wnt10b deficiency allele with morpholino knockdown and genetic epistasis","pmids":["12591239"],"confidence":"High","gaps":["Whether mammalian WNT10B has analogous brain patterning roles not established","Receptor identity for WNT10B in this context unknown"]},{"year":2005,"claim":"The physiological role of WNT10B in mesenchymal cell fate was unknown; gain- and loss-of-function mouse models demonstrated that WNT10B directs mesenchymal progenitors toward osteoblastogenesis (via Runx2/Dlx5/osterix) and away from adipogenesis (by suppressing C/EBPα/PPARγ) through canonical β-catenin signaling, and simultaneously suppresses adipose tissue development and prevents obesity.","evidence":"FABP4-Wnt10b transgenic mice, Wnt10b−/− knockout mice, body composition analysis, β-catenin manipulation, gene expression analysis","pmids":["15728361","15190075","15673614"],"confidence":"High","gaps":["Whether WNT10B acts cell-autonomously versus paracrine in vivo not fully resolved","Frizzled receptor specificity not determined"]},{"year":2007,"claim":"Whether WNT10B acts solely through canonical Wnt signaling was unresolved; osteoblast-specific overexpression confirmed bone-anabolic effects through increased osteoblast number without affecting osteoclasts, while parallel work revealed β-catenin-independent growth-suppressive activity that could be switched by FGF signaling.","evidence":"Osteocalcin-Wnt10b transgenic and Wnt10b−/− mice with histomorphometry; dominant-negative TCF-4 and β-catenin mutant transduction in cancer cells","pmids":["17708715","17761539"],"confidence":"High","gaps":["Identity of β-catenin-independent signaling effector unknown","Mechanism by which FGF switches WNT10B from suppressor to promoter not resolved"]},{"year":2009,"claim":"The cellular source of WNT10B in PTH-driven bone anabolism was unknown; T-cell-specific Wnt10b deletion demonstrated that CD8+ T cells are the essential paracrine source of WNT10B mediating intermittent PTH's osteogenic effects.","evidence":"T-cell-null mice, T-cell-specific Wnt10b conditional knockout, iPTH treatment with bone histomorphometry","pmids":["19723499"],"confidence":"High","gaps":["Mechanism by which PTH signals to CD8+ T cells to induce Wnt10b expression not yet identified","Whether other immune cells contribute WNT10B in different contexts unclear"]},{"year":2011,"claim":"Whether WNT10B activates non-canonical pathways was systematically addressed; WNT10B was shown to activate NF-κB and Notch signaling in addition to canonical Wnt, and its anti-adipogenic/pro-osteogenic functions were confirmed to be entirely β-catenin-dependent by epistasis experiments.","evidence":"β-catenin knockdown in ST2 cells abolishing differentiation effects; NF-κB and Notch reporter assays in U2OS cells","pmids":["21872687","21321991"],"confidence":"High","gaps":["Whether NF-κB/Notch activation by WNT10B is direct or indirect not established","NF-κB/Notch activation observed in single cell line only"]},{"year":2012,"claim":"Post-transcriptional regulation of WNT10B was unknown; miR-148a was identified as a direct negative regulator targeting the WNT10B 3′-UTR, and WNT10B was shown to drive hair follicle telogen-to-anagen transition through β-catenin signaling.","evidence":"3′-UTR luciferase reporter and conditioned medium migration assays; adenoviral Wnt10b with β-catenin siRNA in mouse skin","pmids":["22890324","22832493"],"confidence":"High","gaps":["Whether miR-148a is the dominant post-transcriptional regulator of WNT10B in vivo not established","Upstream signals activating Wnt10b in hair follicle stem cells not determined"]},{"year":2013,"claim":"Multiple transcriptional and paracrine regulatory inputs to WNT10B were identified: HIF-2α directly binds the Wnt10b enhancer under hypoxia, XBP1 directly represses the Wnt10b promoter during adipogenesis, TGF-β1 induces Wnt10b in osteoclasts via Smad2/3 for coupling to osteoblast mineralization, and WNT10B drives TNBC proliferation through a β-catenin–HMGA2–EZH2 transcriptional axis.","evidence":"ChIP for HIF-2α and XBP1 at Wnt10b regulatory regions; Smad2/3 inhibition with DKK1 blockade; ChIP plus Hmga2 haploinsufficiency in MMTV-Wnt10b tumors","pmids":["23900840","23603388","23861379","23307470"],"confidence":"High","gaps":["Whether HIF-2α regulation of Wnt10b operates in bone cells not tested","Relative contributions of XBP1 direct repression versus XBP1s→miR-148a indirect repression not quantified"]},{"year":2013,"claim":"The role of WNT10B in hematopoietic progenitor regulation was unknown; estrogen deficiency was shown to expand short-term HSPCs through a CD40L→T-cell WNT10B pathway, demonstrating WNT10B as a niche signal linking immune and hematopoietic compartments.","evidence":"CD40L-null, global and T-cell-specific Wnt10b−/− mice with HSPC flow cytometry after ovariectomy","pmids":["23954891"],"confidence":"High","gaps":["Whether WNT10B acts directly on HSPCs or through intermediate niche cells unclear","Frizzled receptor on HSPCs not identified"]},{"year":2016,"claim":"The XBP1s→miR-148a→Wnt10b axis was mechanistically resolved by demonstrating that XBP1s directly transactivates miR-148a, which then silences Wnt10b during adipogenesis; concurrently, human WNT10B loss-of-function mutations were shown to cause oligodontia by abolishing canonical signaling required for tooth development.","evidence":"ChIP for XBP1s at miR-148a promoter with point mutation validation; TOPFlash assays with naturally occurring human WNT10B mutants in dental pulp stem cells","pmids":["27055562","27321946"],"confidence":"High","gaps":["Whether XBP1s→miR-148a axis operates in tissues beyond adipocytes not addressed","Full spectrum of WNT10B-associated dental phenotypes not delineated"]},{"year":2017,"claim":"Novel delivery and signaling modes for WNT10B were discovered: fibroblast-derived exosomes mobilize autocrine WNT10B to lipid rafts activating mTOR via GSK3β/TSC2 for CNS axon regeneration, paracrine exosomal WNT10B promotes breast cancer EMT, and MAT2A–EZH2 epigenetically represses Wnt10b via H3K27me3 during adipogenesis.","evidence":"Wnt10b−/− mice with optic nerve crush; p85α-knockdown fibroblast exosomes in co-culture; ChIP for MAT2A and H3K27me3 at Wnt10b promoter with enzyme inhibition","pmids":["28683327","28394344","29133280"],"confidence":"High","gaps":["Whether exosomal versus free WNT10B have different receptor engagement not resolved","Structural basis for WNT10B sorting into exosomes unknown"]},{"year":2018,"claim":"The upstream transcriptional mechanism driving T-cell Wnt10b expression was identified: Treg cells promote assembly of an NFAT1–SMAD3 complex in CD8+ T cells that drives Wnt10b transcription, linking the gut microbiome (butyrate/Treg expansion) to bone anabolism via WNT10B.","evidence":"Germ-free mice, LGG/butyrate supplementation, reconstitution with Wnt10b−/− CD8+ T cells, Treg depletion, transcription factor complex analysis","pmids":["30446387"],"confidence":"High","gaps":["Whether NFAT1–SMAD3 directly binds the Wnt10b promoter not confirmed by ChIP","Whether other microbial metabolites feed into this axis unknown"]},{"year":2020,"claim":"A mitotic function for WNT10B was previously unrecognized; WNT10B was identified as the specific Wnt ligand required for autocrine LRP6-mediated GSK3β inhibition that ensures proper mitotic microtubule dynamics and faithful chromosome segregation (the Wnt/STOP pathway).","evidence":"LRP6 and Wnt10b knockdown in human somatic cells with quantitative microtubule dynamics and chromosome segregation analysis","pmids":["33257473"],"confidence":"High","gaps":["Whether WNT10B/STOP function is conserved across cell types not broadly tested","Identity of the GSK3β substrates mediating microtubule stabilization in mitosis not determined"]},{"year":2022,"claim":"Epigenetic repression of Wnt10b by BMI1 was established in spermatogonial stem cells, where BMI1 deposits H2AK119ub and reduces H3K4me3 at the Wnt10b locus to keep canonical Wnt signaling low, which is essential for SSC self-renewal.","evidence":"BMI1 knockout mice, ChIP for H2AK119ub and H3K4me3 at Wnt10b, Wnt/β-catenin inhibitor rescue","pmids":["35541907"],"confidence":"High","gaps":["Whether BMI1 directly binds the Wnt10b locus or acts indirectly not shown","Whether WNT10B is the sole PRC1 target mediating the SSC phenotype not resolved"]},{"year":null,"claim":"The Frizzled receptor(s) and co-receptors mediating WNT10B's tissue-specific signaling outcomes remain unidentified, and the structural basis for how WNT10B engages canonical versus non-canonical (NF-κB, Notch, RAC1) pathways is unresolved.","evidence":"","pmids":[],"confidence":"Low","gaps":["No receptor-binding or structural data for WNT10B","Mechanism distinguishing canonical from non-canonical WNT10B signaling unknown","Whether WNT10B lipid modifications affect receptor selectivity not studied"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0048018","term_label":"receptor ligand activity","supporting_discovery_ids":[0,3,8,13,15,28]},{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[0,1,2,4]}],"localization":[{"term_id":"GO:0005576","term_label":"extracellular region","supporting_discovery_ids":[3,11,13,26]},{"term_id":"GO:0031410","term_label":"cytoplasmic vesicle","supporting_discovery_ids":[13,26]},{"term_id":"GO:0005929","term_label":"cilium","supporting_discovery_ids":[32]},{"term_id":"GO:0005886","term_label":"plasma membrane","supporting_discovery_ids":[13]}],"pathway":[{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[0,2,3,8,13,15,24,28]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[0,1,4,33]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[5,8,26]},{"term_id":"R-HSA-1640170","term_label":"Cell Cycle","supporting_discovery_ids":[24]}],"complexes":[],"partners":["CTNNB1","LRP6","HMGA2","EZH2","RAC1","GSK3B"],"other_free_text":[]},"mechanistic_narrative":"WNT10B is a secreted Wnt ligand that activates canonical β-catenin/TCF signaling to govern mesenchymal stem cell fate decisions, hair follicle cycling, midbrain-hindbrain boundary patterning, and mitotic fidelity. In bone and adipose tissue, WNT10B promotes osteoblastogenesis by inducing Runx2, Dlx5, and osterix while suppressing the adipogenic transcription factors C/EBPα and PPARγ, and Wnt10b-null mice exhibit progressive trabecular bone loss and increased adiposity [PMID:15728361, PMID:15190075, PMID:20499361]; intermittent PTH drives bone anabolism specifically through CD8+ T-cell-produced WNT10B acting on preosteoblasts via an NFAT1–SMAD3-dependent transcriptional mechanism [PMID:19723499, PMID:30446387]. WNT10B expression is regulated epigenetically by NSD1 (H3K36me2), MAT2A–EZH2 (H3K27me3), and BMI1 (H2AK119ub) at its locus, and post-transcriptionally by miR-148a targeting its 3′-UTR [PMID:31727171, PMID:29133280, PMID:35541907, PMID:22890324]. Loss-of-function WNT10B mutations that abolish canonical signaling cause human oligodontia, and MMTV-driven overexpression in the mammary gland induces adenocarcinoma cooperatively with FGF signaling, while in triple-negative breast cancer WNT10B drives proliferation through a β-catenin–HMGA2–EZH2 transcriptional axis [PMID:27321946, PMID:9393971, PMID:23307470]."},"prefetch_data":{"uniprot":{"accession":"O00744","full_name":"Protein Wnt-10b","aliases":["Protein Wnt-12"],"length_aa":389,"mass_kda":43.0,"function":"Member of the Wnt ligand gene family that encodes for secreted proteins, which activate the Wnt signaling cascade. Specifically activates canonical Wnt/beta-catenin signaling and thus triggers beta-catenin/LEF/TCF-mediated transcriptional programs. Involved in signaling networks controlling stemness, pluripotency and cell fate decisions. Acts in the immune system, mammary gland, adipose tissue, bone and skin","subcellular_location":"Secreted, extracellular space, extracellular matrix; Secreted","url":"https://www.uniprot.org/uniprotkb/O00744/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/WNT10B","classification":"Not Classified","n_dependent_lines":2,"n_total_lines":1208,"dependency_fraction":0.0016556291390728477},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/WNT10B","total_profiled":1310},"omim":[{"mim_id":"617073","title":"TOOTH AGENESIS, SELECTIVE, 8; STHAG8","url":"https://www.omim.org/entry/617073"},{"mim_id":"606268","title":"WINGLESS-TYPE MMTV INTEGRATION SITE FAMILY, MEMBER 10A; WNT10A","url":"https://www.omim.org/entry/606268"},{"mim_id":"604663","title":"WINGLESS-TYPE MMTV INTEGRATION SITE FAMILY, MEMBER 6; WNT6","url":"https://www.omim.org/entry/604663"},{"mim_id":"603823","title":"FREE FATTY ACID RECEPTOR 2; FFAR2","url":"https://www.omim.org/entry/603823"},{"mim_id":"603273","title":"TUMOR PROTEIN p63; TP63","url":"https://www.omim.org/entry/603273"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Golgi apparatus","reliability":"Approved"}],"tissue_specificity":"Tissue enriched","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"brain","ntpm":39.1}],"url":"https://www.proteinatlas.org/search/WNT10B"},"hgnc":{"alias_symbol":["WNT-12","SHFM6"],"prev_symbol":[]},"alphafold":{"accession":"O00744","domains":[{"cath_id":"-","chopping":"47-149_191-328","consensus_level":"high","plddt":87.1295,"start":47,"end":328},{"cath_id":"3.30.2460.20","chopping":"331-389","consensus_level":"medium","plddt":93.1646,"start":331,"end":389}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/O00744","model_url":"https://alphafold.ebi.ac.uk/files/AF-O00744-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-O00744-F1-predicted_aligned_error_v6.png","plddt_mean":80.06},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=WNT10B","jax_strain_url":"https://www.jax.org/strain/search?query=WNT10B"},"sequence":{"accession":"O00744","fasta_url":"https://rest.uniprot.org/uniprotkb/O00744.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/O00744/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/O00744"}},"corpus_meta":[{"pmid":"15728361","id":"PMC_15728361","title":"Regulation 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Wnt10b-/- mice have decreased trabecular bone and serum osteocalcin, confirming its endogenous role in bone formation.\",\n      \"method\": \"Transgenic mouse overexpression (FABP4-Wnt10b), Wnt10b-/- knockout mice, pharmacological and genetic approaches (β-catenin manipulation), gene expression analysis\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal gain/loss-of-function in vivo with specific transcription factor readouts, replicated across multiple approaches\",\n      \"pmids\": [\"15728361\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"Wnt10b inhibits development of both white and brown adipose tissue in vivo; transgenic expression from the FABP4 promoter blocks adipogenesis throughout the body, reduces total body fat ~50%, and prevents diet-induced obesity, demonstrating Wnt10b is a physiological regulator of adipogenesis.\",\n      \"method\": \"FABP4-Wnt10b transgenic mice, body composition analysis, histology, metabolic measurements\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — clean in vivo transgenic model with multiple phenotypic readouts, foundational study\",\n      \"pmids\": [\"15190075\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Wnt10b (and Wnt6 and Wnt10a) inhibit adipogenesis and stimulate osteoblastogenesis exclusively through a β-catenin-dependent mechanism; knockdown of β-catenin completely abolishes these effects of all three Wnt ligands in bipotential ST2 mesenchymal cells.\",\n      \"method\": \"Gain- and loss-of-function in ST2 and 3T3-L1 cells, β-catenin knockdown, differentiation assays\",\n      \"journal\": \"Bone\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal gain/loss-of-function approaches; β-catenin requirement demonstrated by epistasis\",\n      \"pmids\": [\"21872687\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"Intermittent PTH increases Wnt10b production by bone marrow CD8+ T cells, which then activates canonical Wnt signaling in preosteoblasts to stimulate osteoblastic commitment, proliferation, differentiation, and life span; T-cell-null mice and mice lacking T-cell-produced Wnt10b show no anabolic response to iPTH.\",\n      \"method\": \"T cell-null mice, conditional Wnt10b knockout (T-cell-specific), iPTH treatment, bone histomorphometry, Wnt reporter assays\",\n      \"journal\": \"Cell metabolism\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic epistasis with T-cell-specific Wnt10b deletion and T cell-null mice, multiple bone formation readouts\",\n      \"pmids\": [\"19723499\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"In myoblasts, Wnt10b deficiency increases adipogenic potential and promotes coexpression of myogenic and adipogenic programs; decreased Wnt10b in aged myoblasts contributes to excessive lipid accumulation. Mimicking Wnt signaling via Wnt10b overexpression or GSK3 inhibition restores myogenic differentiation and suppresses adipogenic gene expression.\",\n      \"method\": \"Wnt10b-/- mice, overexpression in aged myoblasts, GSK-3 inhibition, in vitro differentiation assays, in vivo muscle regeneration\",\n      \"journal\": \"Molecular biology of the cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — null mice plus overexpression rescue, multiple differentiation readouts in vitro and in vivo\",\n      \"pmids\": [\"15673614\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1997,\n      \"finding\": \"Overexpression of Wnt10b in the mouse mammary gland via MMTV promoter causes hypermorphic mammary gland development (precocious alveologenesis, ductal branching in males) and high susceptibility to mammary adenocarcinoma; co-expression with FGF-3/int-2 causes a potent synergistic interaction, indicating Wnt10b is a proto-oncogene that cooperates with FGF signaling.\",\n      \"method\": \"MMTV-Wnt10b transgenic mice, MMTV-Wnt10b × MMTV-FGF-3 crosses, histology, tumor incidence\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — clean transgenic gain-of-function in vivo with defined mammary phenotypes and oncogenic cooperation\",\n      \"pmids\": [\"9393971\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"Osteoblast-specific overexpression of Wnt10b (from osteocalcin promoter) increases bone mass primarily by stimulating osteoblastogenesis, specifically increasing osteoblast number per bone surface, mineral apposition rate, and mineralizing surface, without altering pre-osteoblast proliferation, osteoblast apoptosis, or osteoclast number; Wnt10b-/- mice show reduced bone formation rate.\",\n      \"method\": \"Oc-Wnt10b transgenic mice, Wnt10b-/- mice, μCT, histomorphometry, BrdU, TUNEL, TRACP5b assays\",\n      \"journal\": \"Journal of bone and mineral research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — complementary gain and loss of function with specific cellular mechanism identified by histomorphometry\",\n      \"pmids\": [\"17708715\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"Wnt10b is required for maintenance of adult bone density and mesenchymal progenitor cells (MPCs); Wnt10b-null mice show progressive age-dependent loss of trabecular bone associated with reduction in bone marrow-derived MPC number and decreased osteoblast differentiation marker expression.\",\n      \"method\": \"Wnt10b-null mice, μCT, bone histomorphometry, colony-forming unit assays, osteogenic gene expression in primary BMSCs\",\n      \"journal\": \"Journal of bone and mineral research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — complete null mice with multiple quantitative bone and progenitor cell readouts\",\n      \"pmids\": [\"20499361\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"WNT10B activates canonical β-catenin signaling leading to transcriptional upregulation of HMGA2 in triple-negative breast cancer (TNBC); HMGA2 is necessary and sufficient for WNT10B-driven proliferation; HMGA2 and EZH2 displace Groucho/TLE1 from TCF-4 and mediate K49 acetylation on β-CATENIN required for transcription.\",\n      \"method\": \"ChIP analysis, siRNA knockdown, WNT/β-catenin pathway modulators, MMTV-Wnt10b transgenic tumors, luciferase reporter, Hmga2 haploinsufficiency mouse model\",\n      \"journal\": \"EMBO molecular medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — ChIP demonstrates direct transcriptional mechanism; multiple orthogonal methods including in vivo genetic model\",\n      \"pmids\": [\"23307470\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Butyrate-induced expansion of regulatory T (Treg) cells promotes Treg-CD8+ T cell interaction, leading to increased Wnt10b secretion by CD8+ T cells; mechanistically, Treg cells drive assembly of a NFAT1-SMAD3 transcription complex in CD8+ T cells, which drives Wnt10b expression and bone anabolism.\",\n      \"method\": \"Germ-free mouse models, LGG probiotic/butyrate supplementation, TCRβ-/- reconstitution with Wnt10b-/- CD8+ T cells, Treg cell depletion, transcription factor complex analysis\",\n      \"journal\": \"Immunity\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic rescue experiments with Wnt10b-/- T cells and Treg depletion, mechanistic transcription complex identified\",\n      \"pmids\": [\"30446387\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"miR-148a directly targets the 3'-UTR of WNT10B mRNA in cancer-associated fibroblasts; silencing of miR-148a in CAFs increases WNT10B protein levels and stimulates migration of endometrial cancer cells through Wnt/β-catenin pathway activation.\",\n      \"method\": \"3'-UTR luciferase reporter assay, lentiviral miR-148a overexpression, conditioned medium migration assays, SuperTOPFlash reporter\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — direct 3'-UTR target validation by luciferase reporter plus functional rescue experiments\",\n      \"pmids\": [\"22890324\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"TGF-β1 stimulates Wnt10b production in osteoclasts through Smad2/3 activation (independent of AKT or MAPK), which then promotes osteoblast mineralization; blocking Wnt10b activity with DKK1 suppresses TGF-β-treated osteoclast-conditioned medium-induced mineralization.\",\n      \"method\": \"Osteoclast-conditioned medium, DKK1 inhibition, Smad2/3 signaling blockade, mineralization assays\",\n      \"journal\": \"Endocrinology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — Smad pathway epistasis with specific pathway inhibitors and functional mineralization readout\",\n      \"pmids\": [\"23861379\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"The Scl-independent bone anabolic activity of intermittent PTH is mediated specifically by T-cell-produced Wnt10b; combined Scl-Ab and iPTH treatment is equally effective as Scl-Ab alone in T-cell-null and T-cell-specific Wnt10b-knockout mice, demonstrating epistatic relationship.\",\n      \"method\": \"T-cell-null mice, T-cell-specific Wnt10b-/- mice, anti-sclerostin antibody, iPTH treatment, bone densitometry, histomorphometry\",\n      \"journal\": \"Journal of bone and mineral research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic epistasis with T-cell-specific conditional KO and pharmacological tools\",\n      \"pmids\": [\"24357520\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"Fibroblast-derived exosomes (FD exosomes) mobilize autocrine Wnt10b toward lipid rafts, activating the mTOR pathway via GSK3β and TSC2; Wnt10b-deleted animals show strongly reduced axonal regeneration after optic nerve injury in response to FD exosomes, establishing an autocrine Wnt10b-mTOR pathway for CNS axonal regeneration.\",\n      \"method\": \"Wnt10b-deleted mice, FD exosome application, optic nerve crush model, lipid raft fractionation, mTOR/GSK3β/TSC2 pathway analysis\",\n      \"journal\": \"Cell reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic KO with in vivo nerve injury model and biochemical pathway analysis\",\n      \"pmids\": [\"28683327\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"A naturally occurring missense mutation C256Y in WNT10B abrogates the ability of WNT10B to activate canonical Wnt signaling and block adipogenesis, establishing that WNT10B canonical signaling activity is required for its anti-adipogenic function in humans.\",\n      \"method\": \"Functional assay of canonical Wnt signaling activity and adipogenesis inhibition for naturally occurring human WNT10B missense variants\",\n      \"journal\": \"Diabetologia\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — structure-function mutagenesis via naturally occurring human variant with direct functional assay\",\n      \"pmids\": [\"16477437\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"Wnt10b overexpression induces hair follicle regeneration by switching follicles from telogen to anagen via canonical Wnt signaling; β-catenin translocates to the nucleus in Wnt10b-induced follicles; knockdown of β-catenin abrogates Wnt10b's biological effects on hair follicle cycling.\",\n      \"method\": \"Adenovirus-mediated Wnt10b overexpression, siRNA knockdown of Wnt10b and β-catenin, in vivo mouse intradermal injection model, histology\",\n      \"journal\": \"The Journal of investigative dermatology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — gain and loss of function in vivo with β-catenin epistasis\",\n      \"pmids\": [\"22832493\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Wnt10b activates canonical Wnt, NFκB, and Notch signaling pathways in U2OS osteosarcoma cells; Wnt3a fails to induce NFκB and Notch activation, demonstrating Wnt10b-specific activity beyond canonical Wnt/β-catenin signaling.\",\n      \"method\": \"Stable Wnt10b-expressing U2OS cell line, microarray, NFκB and Notch reporter assays, gene expression analysis\",\n      \"journal\": \"Journal of cellular biochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — reporter assays confirm pathway activation, but single cell line system\",\n      \"pmids\": [\"21321991\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"WNT10B promotes proliferation of human corneal endothelial cells through simultaneous β-catenin-dependent and β-catenin-independent pathways; specifically, WNT10B causes nuclear transport and binding of both RAC1 and β-catenin, leading to Cyclin D1 expression.\",\n      \"method\": \"Wnt10b overexpression in human corneal endothelial cells, nuclear fractionation, RAC1 and β-catenin co-localization, Cyclin D1 reporter, proliferation assay\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — identifies dual β-catenin-dependent and -independent mechanism with RAC1 as novel effector; single cell type system\",\n      \"pmids\": [\"26370090\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Ovariectomy-induced estrogen deficiency expands short-term hematopoietic stem and progenitor cells (ST-HSPCs) through T-cell expression of CD40L, which stimulates T-cell production of Wnt10b; Wnt10b then activates Wnt signaling in HSPCs. Ovariectomy fails to expand ST-HSPCs in CD40L-null mice and in animals lacking global or T-cell expression of Wnt10b.\",\n      \"method\": \"CD40L-null mice, global and T-cell-specific Wnt10b-/- mice, bone marrow transplantation, HSPC flow cytometry\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic epistasis using multiple null mouse models with quantitative HSPC readouts\",\n      \"pmids\": [\"23954891\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"XBP1s directly induces transcription of microRNA-148a, which in turn binds the 3'-UTR of Wnt10b mRNA and mediates silencing of Wnt10b during adipogenic differentiation of 3T3-L1 cells, establishing an XBP1s→miR-148a→Wnt10b regulatory axis.\",\n      \"method\": \"XBP1s knockdown/overexpression, miR-148a 3'-UTR reporter assay, ChIP for XBP1s at miR-148a promoter, point mutation analysis, mRNA stability assays\",\n      \"journal\": \"Experimental & molecular medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — direct ChIP and reporter assays with point mutation validation establish mechanistic chain\",\n      \"pmids\": [\"27055562\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"XBP1 directly binds to the Wnt10b promoter and suppresses Wnt10b expression during 3T3-L1 preadipocyte differentiation, leading to decreased β-catenin signaling; XBP1 and Wnt10b show reciprocal expression patterns during early adipogenesis.\",\n      \"method\": \"XBP1 overexpression/knockdown, ChIP for XBP1 at Wnt10b promoter, β-catenin activity assays, expression profiling during adipogenesis\",\n      \"journal\": \"FEBS letters\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct ChIP establishes binding; single cell type system\",\n      \"pmids\": [\"23603388\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Hypoxia-inducible factor-2α (HIF-2α), but not HIF-1α, directly binds the Wnt10b enhancer region and drives Wnt10b expression under hypoxia in adipogenic cells; HIF-2α-deficient adipogenic cells fail to upregulate Wnt10b under hypoxia, and hypoxia-conditioned medium inhibits adipogenesis through canonical Wnt signaling.\",\n      \"method\": \"ChIP for HIF-2α at Wnt10b enhancer, HIF-2α-deficient adipogenic cells, hypoxia-conditioned medium experiments, β-catenin reporter assays\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — direct ChIP for HIF-2α at Wnt10b enhancer with HIF-2α-deficient cell confirmation\",\n      \"pmids\": [\"23900840\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"NSD1 histone methyltransferase activates Wnt10b expression by mediating H3K36me2 methylation at the Wnt10b locus; NSD1 knockout promotes H3K27me3 and reduces H3K36me2 at the Wnt10b gene, suppressing its expression and thereby inactivating the Wnt/β-catenin pathway in HCC cells.\",\n      \"method\": \"CRISPR/Cas9 NSD1 knockout, ChIP for H3K27me3 and H3K36me2 at Wnt10b, proliferation/invasion assays, xenograft model\",\n      \"journal\": \"Journal of experimental & clinical cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — ChIP directly demonstrates epigenetic control of Wnt10b locus by NSD1; confirmed in vivo\",\n      \"pmids\": [\"31727171\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"MAT2A interacts with EZH2 and MafK, is recruited to the Wnt10b promoter, and represses Wnt10b expression by promoting H3K27 methylation; this Wnt10b suppression inhibits Wnt/β-catenin signaling to promote adipogenesis. MAT2A catalytic activity and its interaction with MAT2B are required for Wnt10b repression.\",\n      \"method\": \"ChIP for MAT2A and H3K27me3 at Wnt10b promoter, co-IP for MAT2A/EZH2/MafK interaction, MAT2A overexpression/knockdown, MATII enzyme inhibition\",\n      \"journal\": \"Biochimica et biophysica acta. Molecular and cell biology of lipids\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — ChIP and co-IP with enzymatic inhibition establish epigenetic mechanism at Wnt10b locus\",\n      \"pmids\": [\"29133280\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Wnt10b-GSK3β-driven autocrine canonical Wnt/LRP6 signaling is required for proper mitotic microtubule dynamics and faithful chromosome segregation in human somatic cells; inhibition of LRP6 signaling causes increased GSK3β activity, abnormal microtubule growth rates in mitotic spindles, and aneuploidy; Wnt10b is the specific Wnt ligand required for this Wnt/STOP function.\",\n      \"method\": \"LRP6/Wnt10b inhibition, microtubule dynamics measurement in mitosis, chromosome segregation analysis, Wnt10b knockdown in human somatic cells\",\n      \"journal\": \"Life science alliance\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — specific KD of Wnt10b with quantitative mitotic phenotype; identifies novel Wnt10b-GSK3β-STOP pathway\",\n      \"pmids\": [\"33257473\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"PTEN reduces BMP9-induced osteogenic differentiation by decreasing Wnt10b expression; BMP9 signals through PI3K/CREB and Smad1/5/9, whose interaction drives Wnt10b transcription; p-CREB and p-Smad1/5/9 are both enriched at the Wnt10b promoter; PTEN disrupts this CREB-BMP/Smad interaction, reducing Wnt10b and osteogenesis.\",\n      \"method\": \"ChIP for p-CREB and p-Smad1/5/9 at Wnt10b promoter, co-IP for CREB/Smad interaction, PI3K inhibitor, rapamycin, PTEN and Wnt10b knockdown, MSC osteogenic assays, xenograft bone formation\",\n      \"journal\": \"Frontiers in cell and developmental biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — ChIP and co-IP demonstrate direct transcriptional mechanism for Wnt10b regulation; confirmed in vivo\",\n      \"pmids\": [\"33614622\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"Low expression of p85α in stromal fibroblasts leads to paracrine WNT10B transport via exosomes to breast cancer epithelial cells, promoting cancer progression through epithelial-to-mesenchymal transition (EMT) via the canonical Wnt pathway.\",\n      \"method\": \"p85α knockdown in fibroblasts, exosome isolation and characterization, co-culture systems, EMT marker analysis, canonical Wnt pathway reporter\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — exosome-mediated transport identified; single lab but multiple readouts\",\n      \"pmids\": [\"28394344\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Wnt10b gain-of-function in cardiomyocytes after myocardial infarction stimulates VEGFR2 expression in endothelial cells and angiopoietin-1 in vascular smooth muscle cells through NF-κB activation, coordinating arteriole formation and reducing fibrosis.\",\n      \"method\": \"Wnt10b gain-of-function mouse line, coronary artery ligation/cryoinjury models, NF-κB activation assay, VEGFR2/angiopoietin-1 expression analysis, histology\",\n      \"journal\": \"Circulation research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — in vivo gain-of-function with mechanistic pathway identification; single lab\",\n      \"pmids\": [\"26338900\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"WNT10B mutations associated with oligodontia (e.g., R211Q, P190R, W262*, F284C) cannot normally enhance canonical Wnt signaling in TOPFlash reporter assays and cannot efficiently induce endothelial differentiation of dental pulp stem cells, establishing that WNT10B canonical signaling is required for tooth development.\",\n      \"method\": \"TOPFlash luciferase reporter assay for canonical Wnt signaling, endothelial differentiation assay of dental pulp stem cells with mutant WNT10B ligands, Sanger sequencing, whole-exome sequencing\",\n      \"journal\": \"American journal of human genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — functional assay of multiple natural human mutants demonstrates required canonical signaling activity\",\n      \"pmids\": [\"27321946\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"BMI1 epigenetically represses Wnt10b expression in spermatogonial stem cells (SSCs) by increasing H2AK119ub and reducing H3K4me3 at the Wnt10b locus; BMI1 inhibition causes transcriptional activation of Wnt10b and nuclear translocation of β-catenin, impairing SSC maintenance; suppression of Wnt/β-catenin signaling rescues SSC maintenance in BMI1-deficient SSCs.\",\n      \"method\": \"BMI1 knockout mouse model, ChIP for H2AK119ub and H3K4me3 at Wnt10b locus, β-catenin localization, Wnt/β-catenin inhibitor rescue experiments\",\n      \"journal\": \"International journal of biological sciences\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — ChIP demonstrates epigenetic control of Wnt10b by BMI1; genetic rescue with Wnt inhibitor confirms epistasis in vivo\",\n      \"pmids\": [\"35541907\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"WNT10B exhibits a functional dualism: it up-regulates β-catenin/Tcf activity (canonical Wnt signaling), but also independently suppresses cell growth and anchorage-independent growth through a β-catenin/Tcf-independent mechanism; FGF signaling switches WNT10B from growth suppressor to growth promoter. WNT10B promoter is aberrantly methylated and silenced in 46% of primary HCC.\",\n      \"method\": \"β-catenin/Tcf reporter assay, dominant-negative TCF-4, β-catenin mutant transduction, growth assays, 5-aza-2'deoxycytidine reactivation, FGF co-treatment\",\n      \"journal\": \"Molecular biology of the cell\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — multiple functional approaches identify dual β-catenin-dependent and -independent mechanisms\",\n      \"pmids\": [\"17761539\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Leucine-rich amelogenin peptide (LRAP) promotes osteogenesis over adipogenesis in mesenchymal stem cells through upregulation of Wnt10b expression; Wnt10b knockdown by siRNA abrogates the osteogenic effect of LRAP, and a Wnt inhibitor (sFRP-1) abolishes LRAP's effects, placing Wnt10b downstream of LRAP in the canonical Wnt signaling pathway.\",\n      \"method\": \"ST2 cell overexpression and Wnt10b siRNA knockdown, sFRP-1 treatment, osteogenesis and adipogenesis assays\",\n      \"journal\": \"Biomaterials\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — epistasis by siRNA KD in cell line; single lab\",\n      \"pmids\": [\"21663957\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Sinusoidal electromagnetic fields promote osteogenic differentiation of osteoblasts through activation of the Wnt10b/β-catenin pathway in a manner dependent on the functional integrity of primary cilia; Wnt10b is localized at the base of primary cilia and is released upon SEMF treatment; siRNA knockdown of IFT88 (abrogating primary cilia) blocks SEMF-induced Wnt10b/β-catenin activation.\",\n      \"method\": \"siRNA knockdown of IFT88 and Wnt10b, immunofluorescence for primary cilia and Wnt10b localization, osteogenic differentiation assays, in vivo rat model with μCT\",\n      \"journal\": \"Journal of bone and mineral research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — subcellular localization tied to functional consequence via IFT88 KD epistasis; single lab\",\n      \"pmids\": [\"30779853\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"In zebrafish, wnt1 and wnt10b function redundantly to maintain threshold levels of Pax2.1 and Fgf8 at the midbrain-hindbrain boundary (MHB); double deletion of both loci causes loss of pax2.1, en2, and her5 expression in the ventral MHB without affecting fgf8, en3, wnt8b, or wnt3a.\",\n      \"method\": \"Zebrafish wnt1-wnt10b deficiency allele, morpholino antisense knockdown, in situ hybridization, genetic epistasis with pax2.1 and fgf8 mutants\",\n      \"journal\": \"Developmental biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic deficiency allele combined with morpholino knockdown and epistasis; functional phenotype at MHB\",\n      \"pmids\": [\"12591239\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"WNT10B is a secreted canonical Wnt ligand that activates β-catenin/TCF-mediated transcription to control mesenchymal stem cell fate (promoting osteoblastogenesis and inhibiting adipogenesis by inducing Runx2/Dlx5/osterix and suppressing C/EBPα/PPARγ), drives hair follicle cycling, and acts in a paracrine/autocrine manner (including via exosomes) with tissue-specific upstream regulators (including PTH-stimulated CD8+ T cells, TGF-β in osteoclasts, HIF-2α, XBP1s→miR-148a, BMI1, and NSD1/MAT2A epigenetic complexes) and downstream effectors (HMGA2/EZH2 in breast cancer, RAC1 in corneal endothelium, mTOR/GSK3β in axon regeneration, and GSK3β-STOP pathway for mitotic fidelity), while certain contexts reveal β-catenin-independent activities including NF-κB and Notch pathway activation.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"WNT10B is a secreted Wnt ligand that activates canonical β-catenin/TCF signaling to govern mesenchymal stem cell fate decisions, hair follicle cycling, midbrain-hindbrain boundary patterning, and mitotic fidelity. In bone and adipose tissue, WNT10B promotes osteoblastogenesis by inducing Runx2, Dlx5, and osterix while suppressing the adipogenic transcription factors C/EBPα and PPARγ, and Wnt10b-null mice exhibit progressive trabecular bone loss and increased adiposity [PMID:15728361, PMID:15190075, PMID:20499361]; intermittent PTH drives bone anabolism specifically through CD8+ T-cell-produced WNT10B acting on preosteoblasts via an NFAT1–SMAD3-dependent transcriptional mechanism [PMID:19723499, PMID:30446387]. WNT10B expression is regulated epigenetically by NSD1 (H3K36me2), MAT2A–EZH2 (H3K27me3), and BMI1 (H2AK119ub) at its locus, and post-transcriptionally by miR-148a targeting its 3′-UTR [PMID:31727171, PMID:29133280, PMID:35541907, PMID:22890324]. Loss-of-function WNT10B mutations that abolish canonical signaling cause human oligodontia, and MMTV-driven overexpression in the mammary gland induces adenocarcinoma cooperatively with FGF signaling, while in triple-negative breast cancer WNT10B drives proliferation through a β-catenin–HMGA2–EZH2 transcriptional axis [PMID:27321946, PMID:9393971, PMID:23307470].\",\n  \"teleology\": [\n    {\n      \"year\": 1997,\n      \"claim\": \"Whether WNT10B had oncogenic potential was unknown; transgenic mammary overexpression established it as a proto-oncogene that cooperates with FGF signaling to drive mammary adenocarcinoma.\",\n      \"evidence\": \"MMTV-Wnt10b transgenic mice and MMTV-Wnt10b × MMTV-FGF-3 crosses with tumor incidence analysis\",\n      \"pmids\": [\"9393971\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism of FGF–WNT10B oncogenic cooperation undefined\", \"Downstream intracellular signaling in mammary tumors uncharacterized at this stage\"]\n    },\n    {\n      \"year\": 2003,\n      \"claim\": \"Whether wnt10b had roles in embryonic patterning was unknown; zebrafish studies showed that wnt1 and wnt10b function redundantly to maintain Pax2.1 expression at the midbrain-hindbrain boundary.\",\n      \"evidence\": \"Zebrafish wnt1-wnt10b deficiency allele with morpholino knockdown and genetic epistasis\",\n      \"pmids\": [\"12591239\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether mammalian WNT10B has analogous brain patterning roles not established\", \"Receptor identity for WNT10B in this context unknown\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"The physiological role of WNT10B in mesenchymal cell fate was unknown; gain- and loss-of-function mouse models demonstrated that WNT10B directs mesenchymal progenitors toward osteoblastogenesis (via Runx2/Dlx5/osterix) and away from adipogenesis (by suppressing C/EBPα/PPARγ) through canonical β-catenin signaling, and simultaneously suppresses adipose tissue development and prevents obesity.\",\n      \"evidence\": \"FABP4-Wnt10b transgenic mice, Wnt10b−/− knockout mice, body composition analysis, β-catenin manipulation, gene expression analysis\",\n      \"pmids\": [\"15728361\", \"15190075\", \"15673614\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether WNT10B acts cell-autonomously versus paracrine in vivo not fully resolved\", \"Frizzled receptor specificity not determined\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Whether WNT10B acts solely through canonical Wnt signaling was unresolved; osteoblast-specific overexpression confirmed bone-anabolic effects through increased osteoblast number without affecting osteoclasts, while parallel work revealed β-catenin-independent growth-suppressive activity that could be switched by FGF signaling.\",\n      \"evidence\": \"Osteocalcin-Wnt10b transgenic and Wnt10b−/− mice with histomorphometry; dominant-negative TCF-4 and β-catenin mutant transduction in cancer cells\",\n      \"pmids\": [\"17708715\", \"17761539\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Identity of β-catenin-independent signaling effector unknown\", \"Mechanism by which FGF switches WNT10B from suppressor to promoter not resolved\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"The cellular source of WNT10B in PTH-driven bone anabolism was unknown; T-cell-specific Wnt10b deletion demonstrated that CD8+ T cells are the essential paracrine source of WNT10B mediating intermittent PTH's osteogenic effects.\",\n      \"evidence\": \"T-cell-null mice, T-cell-specific Wnt10b conditional knockout, iPTH treatment with bone histomorphometry\",\n      \"pmids\": [\"19723499\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism by which PTH signals to CD8+ T cells to induce Wnt10b expression not yet identified\", \"Whether other immune cells contribute WNT10B in different contexts unclear\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Whether WNT10B activates non-canonical pathways was systematically addressed; WNT10B was shown to activate NF-κB and Notch signaling in addition to canonical Wnt, and its anti-adipogenic/pro-osteogenic functions were confirmed to be entirely β-catenin-dependent by epistasis experiments.\",\n      \"evidence\": \"β-catenin knockdown in ST2 cells abolishing differentiation effects; NF-κB and Notch reporter assays in U2OS cells\",\n      \"pmids\": [\"21872687\", \"21321991\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether NF-κB/Notch activation by WNT10B is direct or indirect not established\", \"NF-κB/Notch activation observed in single cell line only\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Post-transcriptional regulation of WNT10B was unknown; miR-148a was identified as a direct negative regulator targeting the WNT10B 3′-UTR, and WNT10B was shown to drive hair follicle telogen-to-anagen transition through β-catenin signaling.\",\n      \"evidence\": \"3′-UTR luciferase reporter and conditioned medium migration assays; adenoviral Wnt10b with β-catenin siRNA in mouse skin\",\n      \"pmids\": [\"22890324\", \"22832493\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether miR-148a is the dominant post-transcriptional regulator of WNT10B in vivo not established\", \"Upstream signals activating Wnt10b in hair follicle stem cells not determined\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Multiple transcriptional and paracrine regulatory inputs to WNT10B were identified: HIF-2α directly binds the Wnt10b enhancer under hypoxia, XBP1 directly represses the Wnt10b promoter during adipogenesis, TGF-β1 induces Wnt10b in osteoclasts via Smad2/3 for coupling to osteoblast mineralization, and WNT10B drives TNBC proliferation through a β-catenin–HMGA2–EZH2 transcriptional axis.\",\n      \"evidence\": \"ChIP for HIF-2α and XBP1 at Wnt10b regulatory regions; Smad2/3 inhibition with DKK1 blockade; ChIP plus Hmga2 haploinsufficiency in MMTV-Wnt10b tumors\",\n      \"pmids\": [\"23900840\", \"23603388\", \"23861379\", \"23307470\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether HIF-2α regulation of Wnt10b operates in bone cells not tested\", \"Relative contributions of XBP1 direct repression versus XBP1s→miR-148a indirect repression not quantified\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"The role of WNT10B in hematopoietic progenitor regulation was unknown; estrogen deficiency was shown to expand short-term HSPCs through a CD40L→T-cell WNT10B pathway, demonstrating WNT10B as a niche signal linking immune and hematopoietic compartments.\",\n      \"evidence\": \"CD40L-null, global and T-cell-specific Wnt10b−/− mice with HSPC flow cytometry after ovariectomy\",\n      \"pmids\": [\"23954891\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether WNT10B acts directly on HSPCs or through intermediate niche cells unclear\", \"Frizzled receptor on HSPCs not identified\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"The XBP1s→miR-148a→Wnt10b axis was mechanistically resolved by demonstrating that XBP1s directly transactivates miR-148a, which then silences Wnt10b during adipogenesis; concurrently, human WNT10B loss-of-function mutations were shown to cause oligodontia by abolishing canonical signaling required for tooth development.\",\n      \"evidence\": \"ChIP for XBP1s at miR-148a promoter with point mutation validation; TOPFlash assays with naturally occurring human WNT10B mutants in dental pulp stem cells\",\n      \"pmids\": [\"27055562\", \"27321946\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether XBP1s→miR-148a axis operates in tissues beyond adipocytes not addressed\", \"Full spectrum of WNT10B-associated dental phenotypes not delineated\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Novel delivery and signaling modes for WNT10B were discovered: fibroblast-derived exosomes mobilize autocrine WNT10B to lipid rafts activating mTOR via GSK3β/TSC2 for CNS axon regeneration, paracrine exosomal WNT10B promotes breast cancer EMT, and MAT2A–EZH2 epigenetically represses Wnt10b via H3K27me3 during adipogenesis.\",\n      \"evidence\": \"Wnt10b−/− mice with optic nerve crush; p85α-knockdown fibroblast exosomes in co-culture; ChIP for MAT2A and H3K27me3 at Wnt10b promoter with enzyme inhibition\",\n      \"pmids\": [\"28683327\", \"28394344\", \"29133280\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether exosomal versus free WNT10B have different receptor engagement not resolved\", \"Structural basis for WNT10B sorting into exosomes unknown\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"The upstream transcriptional mechanism driving T-cell Wnt10b expression was identified: Treg cells promote assembly of an NFAT1–SMAD3 complex in CD8+ T cells that drives Wnt10b transcription, linking the gut microbiome (butyrate/Treg expansion) to bone anabolism via WNT10B.\",\n      \"evidence\": \"Germ-free mice, LGG/butyrate supplementation, reconstitution with Wnt10b−/− CD8+ T cells, Treg depletion, transcription factor complex analysis\",\n      \"pmids\": [\"30446387\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether NFAT1–SMAD3 directly binds the Wnt10b promoter not confirmed by ChIP\", \"Whether other microbial metabolites feed into this axis unknown\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"A mitotic function for WNT10B was previously unrecognized; WNT10B was identified as the specific Wnt ligand required for autocrine LRP6-mediated GSK3β inhibition that ensures proper mitotic microtubule dynamics and faithful chromosome segregation (the Wnt/STOP pathway).\",\n      \"evidence\": \"LRP6 and Wnt10b knockdown in human somatic cells with quantitative microtubule dynamics and chromosome segregation analysis\",\n      \"pmids\": [\"33257473\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether WNT10B/STOP function is conserved across cell types not broadly tested\", \"Identity of the GSK3β substrates mediating microtubule stabilization in mitosis not determined\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Epigenetic repression of Wnt10b by BMI1 was established in spermatogonial stem cells, where BMI1 deposits H2AK119ub and reduces H3K4me3 at the Wnt10b locus to keep canonical Wnt signaling low, which is essential for SSC self-renewal.\",\n      \"evidence\": \"BMI1 knockout mice, ChIP for H2AK119ub and H3K4me3 at Wnt10b, Wnt/β-catenin inhibitor rescue\",\n      \"pmids\": [\"35541907\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether BMI1 directly binds the Wnt10b locus or acts indirectly not shown\", \"Whether WNT10B is the sole PRC1 target mediating the SSC phenotype not resolved\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"The Frizzled receptor(s) and co-receptors mediating WNT10B's tissue-specific signaling outcomes remain unidentified, and the structural basis for how WNT10B engages canonical versus non-canonical (NF-κB, Notch, RAC1) pathways is unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No receptor-binding or structural data for WNT10B\", \"Mechanism distinguishing canonical from non-canonical WNT10B signaling unknown\", \"Whether WNT10B lipid modifications affect receptor selectivity not studied\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0048018\", \"supporting_discovery_ids\": [0, 3, 8, 13, 15, 28]},\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [0, 1, 2, 4]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005576\", \"supporting_discovery_ids\": [3, 11, 13, 26]},\n      {\"term_id\": \"GO:0031410\", \"supporting_discovery_ids\": [13, 26]},\n      {\"term_id\": \"GO:0005929\", \"supporting_discovery_ids\": [32]},\n      {\"term_id\": \"GO:0005886\", \"supporting_discovery_ids\": [13]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [0, 2, 3, 8, 13, 15, 24, 28]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [0, 1, 4, 33]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [5, 8, 26]},\n      {\"term_id\": \"R-HSA-1640170\", \"supporting_discovery_ids\": [24]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\n      \"CTNNB1\",\n      \"LRP6\",\n      \"HMGA2\",\n      \"EZH2\",\n      \"RAC1\",\n      \"GSK3B\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}