{"gene":"IL10","run_date":"2026-06-10T01:55:22","timeline":{"discoveries":[{"year":1990,"finding":"IL-10 (identified as identical to CSIF/B-TCGF) acts as a co-stimulatory growth factor for mature and immature thymocytes in the presence of IL-2 and IL-4, and IL-10 is secreted by fetal thymocytes, adult thymocytes, and splenocytes upon TCR stimulation. EBV gene BCRF1 shares CSIF activity but lacks thymocyte-stimulating activity, indicating at least two functional epitopes on IL-10.","method":"Neutralizing mAb inhibition, recombinant protein activity assay, thymocyte proliferation assay","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal functional assay with neutralizing antibody and recombinant protein, single lab, multiple cell type readouts","pmids":["2124236"],"is_preprint":false},{"year":1992,"finding":"Murine keratinocytes produce IL-10 mRNA and protein in response to hapten application, with peak expression at 12 hours; depletion of Langerhans cells, dendritic epidermal cells, and T lymphocytes confirmed keratinocytes as the main source.","method":"Quantitative RT-PCR, immunoprecipitation with IL-10 mAb, cell depletion experiments","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — orthogonal methods (RT-PCR and immunoprecipitation), cell depletion for source identification, single lab","pmids":["1607665"],"is_preprint":false},{"year":2000,"finding":"IL-10 injection into mice activates STAT3 but not STAT1 in the liver, and induces SOCS2, SOCS3, and CIS mRNA expression. Overexpression of SOCS2 or SOCS3 inhibited IFN-alpha-induced reporter activity in hepatic cells, indicating that IL-10 suppresses IFN-alpha-activated STAT1 signaling at least partly by inducing SOCS2 and SOCS3.","method":"In vivo IL-10 injection, RT-PCR, reporter gene assay, overexpression in hepatic cells","journal":"FEBS letters","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo signaling assay plus reporter gene overexpression validation, single lab, two orthogonal methods","pmids":["11034314"],"is_preprint":false},{"year":2000,"finding":"In reperfused ischemic myocardium, CD5+ lymphocytes are the predominant source of IL-10; IL-10 induces TIMP-1 mRNA expression in isolated mononuclear cells, and this effect is blocked by a neutralizing antibody to IL-10, suggesting IL-10 promotes cardiac healing by modulating mononuclear cell phenotype and inducing TIMP-1.","method":"In vitro neutralizing antibody blockade, RT-PCR, mononuclear cell culture with cardiac lymph","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — neutralizing antibody blockade in vitro with mechanistic readout (TIMP-1 induction), single lab","pmids":["10946312"],"is_preprint":false},{"year":2001,"finding":"Autocrine IL-10 prevents spontaneous maturation of monocyte-derived dendritic cells in vitro and limits LPS- and CD40L-mediated maturation. Neutralization of IL-10 in DCs enhances surface CD83, CD80, CD86, and MHC expression, increases TNF-alpha and IL-12 release, and augments T cell activation and Th1 polarization. IL-10R1 expression is regulated by both transcriptional and posttranscriptional mechanisms in DCs.","method":"Neutralizing antibody addition to DC cultures, flow cytometry, cytokine ELISA, mRNA analysis","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — neutralizing antibody with multiple functional readouts, single lab, multiple orthogonal methods","pmids":["11254683"],"is_preprint":false},{"year":2001,"finding":"IL-10 synergizes with LPS and IFN-gamma to increase S100A8 mRNA (>9-fold) and secreted protein (~4-fold) in macrophages. This synergy requires de novo protein synthesis, is mediated by increased transcription (mapped to a 178-bp promoter fragment), and involves MAP kinase/COX-2/cAMP pathways, mechanistically distinct from STAT pathway-mediated IL-10 gene regulation.","method":"mRNA stability assay, luciferase reporter/transfection, blocking experiments, RT-PCR, ELISA","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reporter gene mapping and mechanistic pathway analysis with multiple methods, single lab","pmids":["11342660"],"is_preprint":false},{"year":2001,"finding":"IL-10 deficiency leads to exaggerated COX-2 mRNA and protein induction and 5.6-fold greater PGE2 production in response to LPS compared to wild-type mice. Neutralization of IFN-gamma, TNF-alpha, or IL-12 markedly decreased COX-2 induction in IL-10-deficient cells, indicating that endogenous IL-10 suppresses PG production indirectly by limiting proinflammatory cytokine production.","method":"IL-10 knockout mice, RT-PCR, Western blot, cytokine neutralization in culture","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic KO combined with cytokine neutralization epistasis, single lab","pmids":["11160331"],"is_preprint":false},{"year":2003,"finding":"IFN-gamma preactivation of macrophages does not suppress IL-10-induced JAK-STAT signaling (STAT3 activation is preserved) but switches the balance of IL-10 STAT activation from STAT3 to STAT1, reprogramming macrophage responses to IL-10 and converting its anti-inflammatory gene expression program to a proinflammatory one.","method":"Gene expression profiling, Western blot for STAT phosphorylation, macrophage cytokine production assays","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — signaling pathway analysis with gene expression profiling and Western blot, single lab, multiple methods","pmids":["14607900"],"is_preprint":false},{"year":2004,"finding":"IL-10 reduces FcepsilonRI beta subunit protein expression in mouse bone marrow-derived mast cells without altering alpha or gamma subunits, thereby diminishing IgE-mediated FcepsilonRI upregulation and inflammatory cytokine production. IL-10 augments the inhibitory effect of IL-4 on FcepsilonRI expression.","method":"Western blot, flow cytometry, mast cell culture with cytokine treatment","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Western blot and functional assays in primary mast cells, single lab, multiple readouts","pmids":["14978125"],"is_preprint":false},{"year":2006,"finding":"Zymosan-induced inhibition of IL-10 signaling in macrophages involves protein kinase Cbeta and internalization of the IL-10 receptor (IL-10R), independently of TLR2 and phagocytosis, and requires direct contact with zymosan.","method":"IL-10 signaling assays, receptor internalization experiments, pharmacological inhibitors, TLR2-deficient cells","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — mechanistic dissection with PKC inhibitors and receptor internalization measurement, use of TLR2-KO cells, single lab","pmids":["16585572"],"is_preprint":false},{"year":2006,"finding":"PGE2 selectively augments IL-10-induced STAT3 and STAT1 phosphorylation and SOCS3 gene expression in THP-1 cells via EP2 or EP4 receptors, cAMP elevation, and requires de novo gene expression; this effect is mediated through protein kinase A and PI3K pathways.","method":"Western blot for STAT phosphorylation, real-time PCR, pharmacological agonists/antagonists, signaling inhibitors","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — pharmacological pathway dissection with multiple orthogonal inhibitors and receptor-specific agonists, single lab","pmids":["16818766"],"is_preprint":false},{"year":2006,"finding":"IL-10 is predominantly monoallelically expressed in CD4+ T cells via a stochastic regulation mechanism; the probability of allelic transcription depends on the strength of TCR signaling and the ability to overcome chromatin hypoacetylation. In vivo Ag-experienced T cells have a higher basal probability to transcribe IL-10 compared with naive cells.","method":"IL-10 reporter mouse (dual allele), allelic expression analysis, in vivo antigen experience experiments","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reporter mouse model with statistical allelic analysis and in vivo validation, single lab","pmids":["17015721"],"is_preprint":false},{"year":2009,"finding":"The transcription factor c-Maf is upregulated by IL-6 plus TGF-beta in Th17 cells in a STAT3-dependent manner, and c-Maf directly transactivates IL-10 gene expression by binding to a MARE (Maf recognition element) motif in the IL-10 promoter. Retroviral transduction of c-Maf induces IL-10 expression in STAT6-deficient T cells.","method":"Gene array, retroviral transduction, ChIP (promoter binding), reporter assay, STAT3/STAT6/STAT1 knockout analysis","journal":"Journal of immunology","confidence":"High","confidence_rationale":"Tier 1 / Strong — direct promoter binding (ChIP), retroviral transduction gain-of-function, multiple genetic knockouts for pathway placement, multiple orthogonal methods","pmids":["19414776"],"is_preprint":false},{"year":2010,"finding":"IL-10 is a structurally intercalated homodimer with each protomer containing a classical four-helix bundle; it signals by binding to two receptor chains (IL-10R1 and IL-10R2). Structural analysis of the binary IL-10/sIL-10R1 complex defines receptor binding site I on IL-10R1, with receptor binding site II on helices A and F of IL-10.","method":"Crystal structure analysis of IL-10 and its receptor complexes","journal":"Cytokine & growth factor reviews","confidence":"High","confidence_rationale":"Tier 1 / Strong — crystal structure with receptor complex, structural validation of binding sites, supported by multiple structural studies","pmids":["20846897"],"is_preprint":false},{"year":2011,"finding":"IL-23 overexpression in the intestinal mucosa suppresses IL-10 gene transcription in CD4+ T cells; IL-23 reduces histone accessibility at the IL-10 promoter (measured by chromatin immunoprecipitation and promoter accessibility assay), and blocking IL-23 restores IL-10 production by lamina propria mononuclear cells.","method":"ChIP assay, promoter accessibility assay, cytokine blockade, in vitro polarization of Th2 cells","journal":"Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 1 / Moderate — ChIP and promoter accessibility assay for epigenetic mechanism, single lab, multiple methods","pmids":["22158873"],"is_preprint":false},{"year":2012,"finding":"IL-10 regulates the switch of muscle macrophages from M1 to M2 phenotype in injured muscle in vivo; ablation of IL-10 amplifies the Th1 response and prevents increases in CD163 and arginase-1. In vitro, M2 macrophages activated by IL-10 increase myoblast proliferation without affecting MyoD or myogenin, whereas direct IL-10 stimulation of muscle cells has no effect on proliferation or these markers.","method":"IL-10 KO mice, in vitro coculture of macrophages and myoblasts, gene expression analysis","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic KO with in vivo phenotypic readout plus in vitro coculture mechanistic dissection, single lab","pmids":["22933625"],"is_preprint":false},{"year":2012,"finding":"IL-10 inhibits sustained Il12b (IL-12 p40) expression in macrophages through HDAC3-mediated histone deacetylation at the Il12b promoter. In IL-10-deficient macrophages, acetylated histone H4 association with the Il12b promoter is prolonged; HDAC inhibitors and HDAC3 shRNA confirmed involvement of HDAC3, while there were no differences in NF-kappaB, MAPK, mRNA stability, or nucleosome remodeling.","method":"ChIP for acetylated histone H4, HDAC inhibitors, HDAC3 shRNA knockdown, RT-PCR, Western blot in IL-10 KO macrophages","journal":"Journal of immunology","confidence":"High","confidence_rationale":"Tier 1 / Strong — ChIP, shRNA knockdown, and pharmacological inhibition all converging on HDAC3-mediated histone deacetylation, multiple orthogonal methods, single lab","pmids":["22786766"],"is_preprint":false},{"year":2013,"finding":"Eosinophil-derived IL-10 at initiation of Trichinella spiralis infection expands IL-10+ myeloid dendritic cells and CD4+ IL-10+ T lymphocytes that inhibit inducible NO synthase (iNOS) expression, protecting intracellular larvae from NO-mediated killing.","method":"IL-10 reporter cells, cell depletion/adoptive transfer, iNOS expression analysis, eosinophil-specific studies","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reporter mice and cell-type-specific ablation with defined mechanistic readout (iNOS suppression), single lab","pmids":["25210122"],"is_preprint":false},{"year":2014,"finding":"NK cells require both IL-12 signaling and activation of the aryl hydrocarbon receptor (AHR) for optimal IL-10 production during Toxoplasma gondii infection. IL-12 stimulation increases NK cell AHR levels; AHR and ARNT (AHR nuclear translocator) are required for optimal IL-10 production, as shown by impaired IL-10 expression in Ahr-/- NK cells.","method":"IL-10 reporter mouse, IL-12 depletion, Ahr-/- knockout mice, in vitro stimulation assays","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reporter mouse and AHR-KO with in vivo and in vitro validation, single lab","pmids":["24403534"],"is_preprint":false},{"year":2015,"finding":"In Tr1 (regulatory T) cells, IL-10 receptor signaling activates p38 MAPK, which sustains IL-10 production and is required for TR1 cell suppressive activity in vivo. TR1 cells with impaired IL-10 receptor signaling lose their regulatory activity in a murine IBD model, confirmed with human TR1 cells.","method":"Double reporter mice (IL-10eGFP/Foxp3mRFP), transgenic mice with impaired IL-10R signaling, in vitro p38 MAPK analysis, human TR1 cell validation","journal":"Journal of immunology","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic model with reporter mice plus signaling pathway identification (p38 MAPK) plus human cell validation, multiple orthogonal methods, replicated in mouse and human","pmids":["28003377"],"is_preprint":false},{"year":2015,"finding":"In adult SVZ neural progenitors, IL-10 targets Nestin+ progenitors and activates phosphorylation of both ERK and STAT3. Inhibition of MEK/ERK restores neurogenesis to normal levels; silencing STAT3 with lentiviral vectors impairs neurogenesis by blocking IL-10 effects, identifying ERK and STAT3 as downstream effectors of IL-10 in adult neurogenesis.","method":"In vitro and in vivo IL-10 treatment, MEK/ERK inhibitor, lentiviral STAT3 shRNA, phospho-ERK and phospho-STAT3 Western blot","journal":"Frontiers in cellular neuroscience","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — pharmacological inhibitor and lentiviral gene silencing in vitro and in vivo, single lab, two pathway effectors identified","pmids":["25762897"],"is_preprint":false},{"year":2016,"finding":"B1a (CD19+CD11b+CD5+) regulatory B cells rapidly express IL-10 in a TLR2-dependent manner in response to S. aureus; adoptive transfer of B1a cells is protective during acute systemic S. aureus infection in IL-10-deficient hosts, demonstrating that B1a-cell-derived IL-10 is the protective mediator.","method":"Flow cytometry, TLR2-dependence analysis, adoptive cell transfer, IL-10-deficient mice","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — adoptive transfer with mechanistic TLR2-dependence identification, single lab","pmids":["28167629"],"is_preprint":false},{"year":2017,"finding":"IL-10 signaling in adipocytes (via IL-10 receptor alpha, which is highly enriched in mature adipocytes and induced by differentiation, obesity, and aging) represses thermogenic gene transcription by altering chromatin accessibility and inhibiting ATF and C/EBPbeta recruitment to key enhancer regions.","method":"ATAC-seq, ChIP-seq, RNA-seq, bone marrow transplantation to define IL-10 source, adipocyte-specific functional assays","journal":"Cell","confidence":"High","confidence_rationale":"Tier 1 / Strong — ATAC-seq and ChIP-seq directly show chromatin remodeling and TF displacement, combined with RNA-seq and genetic cell-type assignment, rigorous multi-omics in a single study","pmids":["29249357"],"is_preprint":false},{"year":2018,"finding":"Norepinephrine (NE) blocks proinflammatory cytokine secretion exclusively through the beta2-adrenergic receptor (ADRB2) by rapidly inducing IL-10 secretion from innate cells in response to TLR signals; Adrb2-/- animals show elevated TNF-alpha and reduced IL-10 during endotoxemia, and LPS-mediated lethality in Adrb2-/- mice is rescued by exogenous IL-10.","method":"ADRB2 knockout mice, IL-10 rescue experiment, infection models, cytokine ELISA, beta2-specific agonist administration","journal":"Brain, behavior, and immunity","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic KO plus pharmacological rescue with IL-10, multiple in vivo models, single lab","pmids":["30195028"],"is_preprint":false},{"year":2019,"finding":"The cholesterol biosynthesis pathway regulates IL-10 expression in human Th1 cells; inhibition with atorvastatin or 25-hydroxycholesterol specifically blocks switching to IL-10+ phenotype. Mechanistically, 25-hydroxycholesterol significantly decreases c-Maf, the master transcriptional regulator of IL10 in T cells.","method":"Pharmacological inhibition (atorvastatin, 25-hydroxycholesterol), gene expression analysis, pathway analysis of human T cells","journal":"Nature communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — pharmacological pathway inhibition linked to c-Maf regulation, two inhibitors with consistent results, single lab","pmids":["30700717"],"is_preprint":false},{"year":2020,"finding":"Loss of IL-10 signaling (via IL10RB deficiency) in macrophages results in failure to phosphorylate STAT3 in response to IL-10, failure to reduce LPS-induced inflammatory cytokines, and a striking defect in Salmonella killing. IL-10RB-/- macrophages overproduce PGE2, and pharmacological inhibition of PGE2 synthesis or receptor blockade enhances bacterial killing, revealing a regulatory interaction between IL-10 signaling and PGE2 production.","method":"iPSC-derived IL10RB-/- macrophages, gene correction rescue, STAT3 phosphorylation Western blot, bacterial killing assay, PGE2 pharmacological inhibition","journal":"Journal of experimental medicine","confidence":"High","confidence_rationale":"Tier 1 / Strong — isogenic iPSC model with gene correction rescue, multiple functional readouts (STAT3, bacterial killing, PGE2), rigorous mechanistic dissection in a single study","pmids":["31819956"],"is_preprint":false},{"year":2022,"finding":"IL-10 inhibits RANKL-induced osteoclast differentiation by promoting MEG3 methylation (suppressing MEG3 lncRNA expression). MEG3 binds STAT1 and prevents STAT1 from binding to IRF8, thereby maintaining IRF8 levels that inhibit osteoclastogenesis; knockdown of MEG3 inhibits osteoclast differentiation and alleviates osteolysis.","method":"RNA pull-down, RNA immunoprecipitation, chromatin immunoprecipitation, dual-luciferase assay, MEG3 knockdown, TRAP staining","journal":"Cellular signalling","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple molecular interaction assays (RNA pulldown, RIP, ChIP) for MEG3-STAT1-IRF8 axis, single lab","pmids":["35525407"],"is_preprint":false},{"year":2024,"finding":"IL-10 deficiency leads to increased saturated very long chain (VLC) ceramide accumulation due to decreased mono-unsaturated fatty acid (MUFA) synthesis flux; ceramide synthase 2 (CERS2) deletion limits the exacerbated inflammatory gene expression of IL-10 deficiency in vitro and in vivo. The persistent inflammation mediated by VLC ceramides is largely dependent on sustained activity of the transcription factor REL, and restoring MUFA availability limits VLC ceramide production and the associated inflammation.","method":"Genetic deletion of Cers2 in IL-10-deficient background, metabolic flux analysis, gene expression profiling, MUFA supplementation rescue, in vitro and in vivo validation","journal":"Nature","confidence":"High","confidence_rationale":"Tier 1 / Strong — double genetic deletion epistasis, metabolic flux analysis, rescue experiments with MUFA, in vitro and in vivo validation, published in high-tier journal with multiple orthogonal methods","pmids":["38383790"],"is_preprint":false},{"year":2025,"finding":"Tetrameric PKM2 activation in LPS-stimulated macrophages induces IL-10 production by increasing glycolytic ATP release; extracellular ATP is converted to adenosine by ectonucleotidases, and adenosine activates the A2a receptor (A2aR) to enhance IL-10 production. This effect is abolished in PKM2-deficient macrophages and is associated with improved mitochondrial health.","method":"PKM2 pharmacological activator (TEPP-46), PKM2-deficient macrophages, ectonucleotidase pathway analysis, A2aR pharmacology, mitochondrial assays","journal":"Cell reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic KO (PKM2-deficient) plus pharmacological pathway dissection (ectonucleotidase, A2aR), single lab, mechanistic chain established","pmids":["39772395"],"is_preprint":false}],"current_model":"IL-10 is an intercalated homodimeric cytokine that signals through a heterodimeric receptor complex (IL-10R1/IL-10R2) to activate JAK1/TYK2 and primarily STAT3 (and STAT1 under IFN-gamma priming), driving anti-inflammatory gene expression programs including SOCS3 induction, HDAC3-mediated histone deacetylation of proinflammatory gene promoters (e.g., Il12b), and suppression of VLC ceramide accumulation via fatty acid desaturation; its transcription is directly controlled by c-Maf binding to a MARE element in the IL-10 promoter, is regulated stochastically via chromatin acetylation and TCR signal strength in T cells, and can be induced by upstream signals including PKM2-derived glycolytic ATP→adenosine→A2aR, beta2-adrenergic receptor activation, and cholesterol biosynthesis pathway intermediates, with key functional consequences including suppression of antigen-presenting cell maturation, inhibition of proinflammatory cytokine production, promotion of M2 macrophage polarization, regulation of adipocyte thermogenesis via chromatin remodeling, and enhancement of macrophage bacterial killing through restraint of PGE2 overproduction."},"narrative":{"mechanistic_narrative":"IL-10 is a secreted homodimeric cytokine that functions as a central restraint on inflammation, suppressing antigen-presenting cell maturation and proinflammatory cytokine output while promoting tissue-protective immune programs [PMID:11254683, PMID:11160331]. Structurally it is an intercalated homodimer of four-helix-bundle protomers that engages a heterodimeric receptor (IL-10R1/IL-10R2), with defined binding sites I and II on the cytokine and receptor [PMID:20846897]. Receptor engagement activates JAK-STAT signaling, predominantly STAT3, and induces SOCS family members (SOCS2/SOCS3) that dampen IFN-driven STAT1 signaling [PMID:11034314]; STAT3 phosphorylation is the essential output, since loss of IL-10RB abolishes STAT3 activation, fails to suppress LPS-induced cytokines, and impairs bacterial killing through PGE2 overproduction [PMID:31819956]. The anti-inflammatory transcriptional program operates partly through chromatin-level repression: IL-10 recruits HDAC3 to deacetylate histones at the Il12b promoter, terminating sustained proinflammatory transcription [PMID:22786766], and in adipocytes IL-10 receptor signaling remodels chromatin accessibility to displace ATF and C/EBPbeta from thermogenic enhancers [PMID:29249357]. IL-10 also reprograms macrophages toward an M2 phenotype that supports tissue repair [PMID:22933625], and restrains chronic inflammation metabolically by sustaining mono-unsaturated fatty acid flux to prevent REL-dependent very-long-chain ceramide accumulation [PMID:38383790]. IL-10 transcription in T cells is directly driven by c-Maf binding a MARE element in the IL10 promoter [PMID:19414776] and is gated stochastically by chromatin acetylation and TCR signal strength [PMID:17015721]. Diverse upstream inputs converge on IL-10 induction, including beta2-adrenergic receptor signaling [PMID:30195028], a PKM2-glycolytic-ATP-to-adenosine/A2aR axis [PMID:39772395], cholesterol biosynthesis intermediates acting via c-Maf [PMID:30700717], and AHR signaling in NK cells [PMID:24403534].","teleology":[{"year":1990,"claim":"Established IL-10 (CSIF/B-TCGF) as a defined cytokine with distinct functional epitopes, separating its co-stimulatory and cytokine-synthesis-inhibiting activities.","evidence":"Neutralizing mAb inhibition and recombinant protein thymocyte proliferation assays","pmids":["2124236"],"confidence":"Medium","gaps":["Receptor and signaling mechanism not yet defined","Epitope mapping not structurally resolved at this stage"]},{"year":2000,"claim":"Linked IL-10 to the JAK-STAT axis by showing it selectively activates STAT3 and induces SOCS proteins that suppress IFN-driven STAT1 signaling, defining its anti-inflammatory signaling output.","evidence":"In vivo IL-10 injection, RT-PCR, and reporter assays with SOCS overexpression in hepatic cells","pmids":["11034314"],"confidence":"Medium","gaps":["Direct receptor-JAK coupling not assayed","STAT3 versus STAT1 balance under priming not addressed"]},{"year":2001,"claim":"Demonstrated that IL-10 acts as an autocrine brake on dendritic cell maturation and that endogenous IL-10 suppresses prostaglandin production indirectly by limiting proinflammatory cytokines.","evidence":"Neutralizing antibody DC cultures and IL-10 knockout macrophages with cytokine neutralization epistasis","pmids":["11254683","11160331"],"confidence":"Medium","gaps":["Molecular mediators downstream of STAT3 not identified","Direct versus indirect COX-2 regulation only inferred from epistasis"]},{"year":2003,"claim":"Revealed that IFN-gamma priming reprograms IL-10 responses by shifting STAT activation from STAT3 to STAT1, converting an anti-inflammatory program to a proinflammatory one.","evidence":"Gene expression profiling and STAT phosphorylation Western blot in macrophages","pmids":["14607900"],"confidence":"Medium","gaps":["Mechanism of STAT selection not resolved","Receptor-level basis of the switch unknown"]},{"year":2006,"claim":"Showed IL-10 signaling is actively modulated at the receptor by PKCbeta-driven IL-10R internalization, identifying a route by which pathogen contact silences IL-10 responses.","evidence":"Receptor internalization assays with PKC inhibitors in TLR2-deficient cells","pmids":["16585572"],"confidence":"Medium","gaps":["Structural basis of internalization not defined","Physiological scope beyond zymosan untested"]},{"year":2009,"claim":"Identified c-Maf as the direct transcriptional driver of IL-10 via MARE-element binding in the promoter, defining the master regulator of IL-10 transcription in T cells.","evidence":"ChIP promoter binding, retroviral gain-of-function, reporter assays, multiple STAT knockouts","pmids":["19414776"],"confidence":"High","gaps":["Cofactors at the MARE element not enumerated","Cell-type-specific differences in c-Maf dependence not fully mapped"]},{"year":2010,"claim":"Resolved IL-10 as an intercalated four-helix-bundle homodimer engaging IL-10R1/IL-10R2 at defined sites, providing the structural framework for receptor assembly.","evidence":"Crystal structures of IL-10 and IL-10/sIL-10R1 complexes","pmids":["20846897"],"confidence":"High","gaps":["Full ternary signaling complex with IL-10R2 not captured here","JAK recruitment geometry not addressed"]},{"year":2011,"claim":"Established that IL-10 transcription is epigenetically gated, with monoallelic stochastic expression controlled by chromatin acetylation and TCR signal strength, and repressible by IL-23-driven promoter inaccessibility.","evidence":"Dual-allele reporter mice, ChIP and promoter accessibility assays, cytokine blockade","pmids":["17015721","22158873"],"confidence":"Medium","gaps":["Chromatin-modifying enzymes at the IL10 locus not fully identified","Quantitative relationship between TCR strength and acetylation incomplete"]},{"year":2012,"claim":"Defined a chromatin-level effector mechanism: IL-10 represses sustained Il12b transcription by recruiting HDAC3 to deacetylate the promoter, and promotes M1-to-M2 macrophage switching in tissue repair.","evidence":"ChIP for acetylated H4, HDAC3 shRNA and inhibitors in IL-10 KO macrophages; IL-10 KO mice with macrophage-myoblast coculture","pmids":["22786766","22933625"],"confidence":"High","gaps":["Link from STAT3 to HDAC3 recruitment not mapped","Genes beyond Il12b under HDAC3 control not catalogued"]},{"year":2015,"claim":"Showed IL-10 receptor signaling sustains its own producers (Tr1 cells) via p38 MAPK and drives non-canonical ERK/STAT3 effects in neural progenitors, broadening IL-10 outputs beyond canonical STAT3.","evidence":"Reporter and impaired-IL-10R transgenic mice with human Tr1 validation; MEK/ERK inhibitor and lentiviral STAT3 shRNA in SVZ progenitors","pmids":["28003377","25762897"],"confidence":"High","gaps":["Receptor-to-p38 coupling mechanism not defined","Tissue specificity of ERK versus STAT3 outputs unresolved"]},{"year":2017,"claim":"Extended IL-10 function to metabolic tissue by demonstrating it represses adipocyte thermogenic transcription through chromatin remodeling and transcription factor displacement.","evidence":"ATAC-seq, ChIP-seq, RNA-seq, and bone marrow transplantation in adipocytes","pmids":["29249357"],"confidence":"High","gaps":["STAT3-to-chromatin-remodeling connection in adipocytes not mechanistically linked","Enzymatic basis of accessibility change not identified"]},{"year":2020,"claim":"Provided isogenic genetic proof that IL-10RB-STAT3 signaling controls macrophage bacterial killing by restraining PGE2 overproduction, unifying the anti-inflammatory and antimicrobial roles.","evidence":"iPSC-derived IL10RB-/- macrophages with gene-correction rescue, STAT3 Western blot, bacterial killing and PGE2 inhibition","pmids":["31819956"],"confidence":"High","gaps":["STAT3 target genes controlling PGE2 synthesis not enumerated","Generalizability across pathogens beyond Salmonella untested"]},{"year":2024,"claim":"Defined a metabolic axis of IL-10 anti-inflammatory action: IL-10 sustains MUFA flux to prevent REL-dependent very-long-chain ceramide accumulation, with CERS2 as the key node.","evidence":"Cers2/IL-10 double genetic deletion, metabolic flux analysis, MUFA rescue in vitro and in vivo","pmids":["38383790"],"confidence":"High","gaps":["How IL-10 signaling controls MUFA synthesis flux mechanistically unresolved","Connection between ceramides and REL activation not fully detailed"]},{"year":2025,"claim":"Identified a glycolytic-metabolic input to IL-10 induction, where tetrameric PKM2 raises ATP release that is converted to adenosine to activate A2aR and drive IL-10 production.","evidence":"PKM2 activator TEPP-46, PKM2-deficient macrophages, ectonucleotidase and A2aR pharmacology","pmids":["39772395"],"confidence":"Medium","gaps":["Transcriptional link from A2aR to the IL10 locus not defined","Relative contribution among the many upstream IL-10 inducers unquantified"]},{"year":null,"claim":"How the canonical STAT3 signal is mechanistically translated into the diverse chromatin-remodeling, metabolic, and HDAC3-dependent effector programs across cell types remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No unified map from receptor engagement to cell-type-specific transcriptional outcomes","Integration of the multiple upstream inducers into a single regulatory logic is incomplete"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0048018","term_label":"receptor ligand activity","supporting_discovery_ids":[13]},{"term_id":"GO:0060089","term_label":"molecular transducer activity","supporting_discovery_ids":[2,25]}],"localization":[{"term_id":"GO:0005576","term_label":"extracellular region","supporting_discovery_ids":[1,23]}],"pathway":[{"term_id":"R-HSA-168256","term_label":"Immune System","supporting_discovery_ids":[4,6,16,25]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[2,25,19]},{"term_id":"R-HSA-4839726","term_label":"Chromatin organization","supporting_discovery_ids":[16,22,14]}],"complexes":[],"partners":["IL10RA","IL10RB"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"P22301","full_name":"Interleukin-10","aliases":["Cytokine synthesis inhibitory factor","CSIF"],"length_aa":178,"mass_kda":20.5,"function":"Major immune regulatory cytokine that acts on many cells of the immune system where it has profound anti-inflammatory functions, limiting excessive tissue disruption caused by inflammation. Mechanistically, IL10 binds to its heterotetrameric receptor comprising IL10RA and IL10RB leading to JAK1 and STAT2-mediated phosphorylation of STAT3 (PubMed:16982608). In turn, STAT3 translocates to the nucleus where it drives expression of anti-inflammatory mediators (PubMed:18025162). Targets antigen-presenting cells (APCs) such as macrophages and monocytes and inhibits their release of pro-inflammatory cytokines including granulocyte-macrophage colony-stimulating factor /GM-CSF, granulocyte colony-stimulating factor/G-CSF, IL-1 alpha, IL-1 beta, IL-6, IL-8 and TNF (PubMed:11564774, PubMed:1940799, PubMed:7512027). Also interferes with antigen presentation by reducing the expression of MHC-class II and co-stimulatory molecules, thereby inhibiting their ability to induce T cell activation (PubMed:8144879). 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Cancer.","date":"2021","source":"Advances in experimental medicine and biology","url":"https://pubmed.ncbi.nlm.nih.gov/33559854","citation_count":38,"is_preprint":false},{"pmid":"30904573","id":"PMC_30904573","title":"IL-10 and CXCL2 in trigeminal ganglia in neuropathic pain.","date":"2019","source":"Neuroscience letters","url":"https://pubmed.ncbi.nlm.nih.gov/30904573","citation_count":37,"is_preprint":false},{"pmid":"12646621","id":"PMC_12646621","title":"IL-10 mediates sigma 1 receptor-dependent suppression of antitumor immunity.","date":"2003","source":"Journal of immunology (Baltimore, Md. : 1950)","url":"https://pubmed.ncbi.nlm.nih.gov/12646621","citation_count":37,"is_preprint":false},{"pmid":"12148907","id":"PMC_12148907","title":"IL-10 in myeloma cells.","date":"2002","source":"Leukemia & lymphoma","url":"https://pubmed.ncbi.nlm.nih.gov/12148907","citation_count":36,"is_preprint":false},{"pmid":"25004816","id":"PMC_25004816","title":"IL-10: achieving balance during persistent viral infection.","date":"2014","source":"Current topics in microbiology and immunology","url":"https://pubmed.ncbi.nlm.nih.gov/25004816","citation_count":36,"is_preprint":false},{"pmid":"26597885","id":"PMC_26597885","title":"Macrophage Polarization in IL-10 Treatment of Particle-Induced Inflammation and Osteolysis.","date":"2015","source":"The American journal of pathology","url":"https://pubmed.ncbi.nlm.nih.gov/26597885","citation_count":36,"is_preprint":false},{"pmid":"35967288","id":"PMC_35967288","title":"A polyphenol-assisted IL-10 mRNA delivery system for ulcerative colitis.","date":"2022","source":"Acta pharmaceutica Sinica. 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Experimental nephrology","url":"https://pubmed.ncbi.nlm.nih.gov/25376659","citation_count":27,"is_preprint":false},{"pmid":"30039195","id":"PMC_30039195","title":"Ascites IL-10 Promotes Ovarian Cancer Cell Migration.","date":"2018","source":"Cancer microenvironment : official journal of the International Cancer Microenvironment Society","url":"https://pubmed.ncbi.nlm.nih.gov/30039195","citation_count":27,"is_preprint":false},{"pmid":"30257887","id":"PMC_30257887","title":"Inhaled IL-10 Suppresses Lung Tumorigenesis via Abrogation of Inflammatory Macrophage-Th17 Cell Axis.","date":"2018","source":"Journal of immunology (Baltimore, Md. : 1950)","url":"https://pubmed.ncbi.nlm.nih.gov/30257887","citation_count":27,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":44830,"output_tokens":7320,"usd":0.122145,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":16678,"output_tokens":4442,"usd":0.09722,"stage2_stop_reason":"end_turn"},"total_usd":0.219365,"stage1_batch_id":"msgbatch_01DUPACZi7AAWwuZiUjseQF4","stage2_batch_id":"msgbatch_018yt7chE3f48PEFtDwtj6AE","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 1990,\n      \"finding\": \"IL-10 (identified as identical to CSIF/B-TCGF) acts as a co-stimulatory growth factor for mature and immature thymocytes in the presence of IL-2 and IL-4, and IL-10 is secreted by fetal thymocytes, adult thymocytes, and splenocytes upon TCR stimulation. EBV gene BCRF1 shares CSIF activity but lacks thymocyte-stimulating activity, indicating at least two functional epitopes on IL-10.\",\n      \"method\": \"Neutralizing mAb inhibition, recombinant protein activity assay, thymocyte proliferation assay\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal functional assay with neutralizing antibody and recombinant protein, single lab, multiple cell type readouts\",\n      \"pmids\": [\"2124236\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1992,\n      \"finding\": \"Murine keratinocytes produce IL-10 mRNA and protein in response to hapten application, with peak expression at 12 hours; depletion of Langerhans cells, dendritic epidermal cells, and T lymphocytes confirmed keratinocytes as the main source.\",\n      \"method\": \"Quantitative RT-PCR, immunoprecipitation with IL-10 mAb, cell depletion experiments\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — orthogonal methods (RT-PCR and immunoprecipitation), cell depletion for source identification, single lab\",\n      \"pmids\": [\"1607665\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"IL-10 injection into mice activates STAT3 but not STAT1 in the liver, and induces SOCS2, SOCS3, and CIS mRNA expression. Overexpression of SOCS2 or SOCS3 inhibited IFN-alpha-induced reporter activity in hepatic cells, indicating that IL-10 suppresses IFN-alpha-activated STAT1 signaling at least partly by inducing SOCS2 and SOCS3.\",\n      \"method\": \"In vivo IL-10 injection, RT-PCR, reporter gene assay, overexpression in hepatic cells\",\n      \"journal\": \"FEBS letters\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo signaling assay plus reporter gene overexpression validation, single lab, two orthogonal methods\",\n      \"pmids\": [\"11034314\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"In reperfused ischemic myocardium, CD5+ lymphocytes are the predominant source of IL-10; IL-10 induces TIMP-1 mRNA expression in isolated mononuclear cells, and this effect is blocked by a neutralizing antibody to IL-10, suggesting IL-10 promotes cardiac healing by modulating mononuclear cell phenotype and inducing TIMP-1.\",\n      \"method\": \"In vitro neutralizing antibody blockade, RT-PCR, mononuclear cell culture with cardiac lymph\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — neutralizing antibody blockade in vitro with mechanistic readout (TIMP-1 induction), single lab\",\n      \"pmids\": [\"10946312\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"Autocrine IL-10 prevents spontaneous maturation of monocyte-derived dendritic cells in vitro and limits LPS- and CD40L-mediated maturation. Neutralization of IL-10 in DCs enhances surface CD83, CD80, CD86, and MHC expression, increases TNF-alpha and IL-12 release, and augments T cell activation and Th1 polarization. IL-10R1 expression is regulated by both transcriptional and posttranscriptional mechanisms in DCs.\",\n      \"method\": \"Neutralizing antibody addition to DC cultures, flow cytometry, cytokine ELISA, mRNA analysis\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — neutralizing antibody with multiple functional readouts, single lab, multiple orthogonal methods\",\n      \"pmids\": [\"11254683\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"IL-10 synergizes with LPS and IFN-gamma to increase S100A8 mRNA (>9-fold) and secreted protein (~4-fold) in macrophages. This synergy requires de novo protein synthesis, is mediated by increased transcription (mapped to a 178-bp promoter fragment), and involves MAP kinase/COX-2/cAMP pathways, mechanistically distinct from STAT pathway-mediated IL-10 gene regulation.\",\n      \"method\": \"mRNA stability assay, luciferase reporter/transfection, blocking experiments, RT-PCR, ELISA\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reporter gene mapping and mechanistic pathway analysis with multiple methods, single lab\",\n      \"pmids\": [\"11342660\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"IL-10 deficiency leads to exaggerated COX-2 mRNA and protein induction and 5.6-fold greater PGE2 production in response to LPS compared to wild-type mice. Neutralization of IFN-gamma, TNF-alpha, or IL-12 markedly decreased COX-2 induction in IL-10-deficient cells, indicating that endogenous IL-10 suppresses PG production indirectly by limiting proinflammatory cytokine production.\",\n      \"method\": \"IL-10 knockout mice, RT-PCR, Western blot, cytokine neutralization in culture\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO combined with cytokine neutralization epistasis, single lab\",\n      \"pmids\": [\"11160331\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"IFN-gamma preactivation of macrophages does not suppress IL-10-induced JAK-STAT signaling (STAT3 activation is preserved) but switches the balance of IL-10 STAT activation from STAT3 to STAT1, reprogramming macrophage responses to IL-10 and converting its anti-inflammatory gene expression program to a proinflammatory one.\",\n      \"method\": \"Gene expression profiling, Western blot for STAT phosphorylation, macrophage cytokine production assays\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — signaling pathway analysis with gene expression profiling and Western blot, single lab, multiple methods\",\n      \"pmids\": [\"14607900\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"IL-10 reduces FcepsilonRI beta subunit protein expression in mouse bone marrow-derived mast cells without altering alpha or gamma subunits, thereby diminishing IgE-mediated FcepsilonRI upregulation and inflammatory cytokine production. IL-10 augments the inhibitory effect of IL-4 on FcepsilonRI expression.\",\n      \"method\": \"Western blot, flow cytometry, mast cell culture with cytokine treatment\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Western blot and functional assays in primary mast cells, single lab, multiple readouts\",\n      \"pmids\": [\"14978125\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"Zymosan-induced inhibition of IL-10 signaling in macrophages involves protein kinase Cbeta and internalization of the IL-10 receptor (IL-10R), independently of TLR2 and phagocytosis, and requires direct contact with zymosan.\",\n      \"method\": \"IL-10 signaling assays, receptor internalization experiments, pharmacological inhibitors, TLR2-deficient cells\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — mechanistic dissection with PKC inhibitors and receptor internalization measurement, use of TLR2-KO cells, single lab\",\n      \"pmids\": [\"16585572\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"PGE2 selectively augments IL-10-induced STAT3 and STAT1 phosphorylation and SOCS3 gene expression in THP-1 cells via EP2 or EP4 receptors, cAMP elevation, and requires de novo gene expression; this effect is mediated through protein kinase A and PI3K pathways.\",\n      \"method\": \"Western blot for STAT phosphorylation, real-time PCR, pharmacological agonists/antagonists, signaling inhibitors\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — pharmacological pathway dissection with multiple orthogonal inhibitors and receptor-specific agonists, single lab\",\n      \"pmids\": [\"16818766\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"IL-10 is predominantly monoallelically expressed in CD4+ T cells via a stochastic regulation mechanism; the probability of allelic transcription depends on the strength of TCR signaling and the ability to overcome chromatin hypoacetylation. In vivo Ag-experienced T cells have a higher basal probability to transcribe IL-10 compared with naive cells.\",\n      \"method\": \"IL-10 reporter mouse (dual allele), allelic expression analysis, in vivo antigen experience experiments\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reporter mouse model with statistical allelic analysis and in vivo validation, single lab\",\n      \"pmids\": [\"17015721\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"The transcription factor c-Maf is upregulated by IL-6 plus TGF-beta in Th17 cells in a STAT3-dependent manner, and c-Maf directly transactivates IL-10 gene expression by binding to a MARE (Maf recognition element) motif in the IL-10 promoter. Retroviral transduction of c-Maf induces IL-10 expression in STAT6-deficient T cells.\",\n      \"method\": \"Gene array, retroviral transduction, ChIP (promoter binding), reporter assay, STAT3/STAT6/STAT1 knockout analysis\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — direct promoter binding (ChIP), retroviral transduction gain-of-function, multiple genetic knockouts for pathway placement, multiple orthogonal methods\",\n      \"pmids\": [\"19414776\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"IL-10 is a structurally intercalated homodimer with each protomer containing a classical four-helix bundle; it signals by binding to two receptor chains (IL-10R1 and IL-10R2). Structural analysis of the binary IL-10/sIL-10R1 complex defines receptor binding site I on IL-10R1, with receptor binding site II on helices A and F of IL-10.\",\n      \"method\": \"Crystal structure analysis of IL-10 and its receptor complexes\",\n      \"journal\": \"Cytokine & growth factor reviews\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — crystal structure with receptor complex, structural validation of binding sites, supported by multiple structural studies\",\n      \"pmids\": [\"20846897\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"IL-23 overexpression in the intestinal mucosa suppresses IL-10 gene transcription in CD4+ T cells; IL-23 reduces histone accessibility at the IL-10 promoter (measured by chromatin immunoprecipitation and promoter accessibility assay), and blocking IL-23 restores IL-10 production by lamina propria mononuclear cells.\",\n      \"method\": \"ChIP assay, promoter accessibility assay, cytokine blockade, in vitro polarization of Th2 cells\",\n      \"journal\": \"Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — ChIP and promoter accessibility assay for epigenetic mechanism, single lab, multiple methods\",\n      \"pmids\": [\"22158873\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"IL-10 regulates the switch of muscle macrophages from M1 to M2 phenotype in injured muscle in vivo; ablation of IL-10 amplifies the Th1 response and prevents increases in CD163 and arginase-1. In vitro, M2 macrophages activated by IL-10 increase myoblast proliferation without affecting MyoD or myogenin, whereas direct IL-10 stimulation of muscle cells has no effect on proliferation or these markers.\",\n      \"method\": \"IL-10 KO mice, in vitro coculture of macrophages and myoblasts, gene expression analysis\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO with in vivo phenotypic readout plus in vitro coculture mechanistic dissection, single lab\",\n      \"pmids\": [\"22933625\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"IL-10 inhibits sustained Il12b (IL-12 p40) expression in macrophages through HDAC3-mediated histone deacetylation at the Il12b promoter. In IL-10-deficient macrophages, acetylated histone H4 association with the Il12b promoter is prolonged; HDAC inhibitors and HDAC3 shRNA confirmed involvement of HDAC3, while there were no differences in NF-kappaB, MAPK, mRNA stability, or nucleosome remodeling.\",\n      \"method\": \"ChIP for acetylated histone H4, HDAC inhibitors, HDAC3 shRNA knockdown, RT-PCR, Western blot in IL-10 KO macrophages\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — ChIP, shRNA knockdown, and pharmacological inhibition all converging on HDAC3-mediated histone deacetylation, multiple orthogonal methods, single lab\",\n      \"pmids\": [\"22786766\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Eosinophil-derived IL-10 at initiation of Trichinella spiralis infection expands IL-10+ myeloid dendritic cells and CD4+ IL-10+ T lymphocytes that inhibit inducible NO synthase (iNOS) expression, protecting intracellular larvae from NO-mediated killing.\",\n      \"method\": \"IL-10 reporter cells, cell depletion/adoptive transfer, iNOS expression analysis, eosinophil-specific studies\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reporter mice and cell-type-specific ablation with defined mechanistic readout (iNOS suppression), single lab\",\n      \"pmids\": [\"25210122\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"NK cells require both IL-12 signaling and activation of the aryl hydrocarbon receptor (AHR) for optimal IL-10 production during Toxoplasma gondii infection. IL-12 stimulation increases NK cell AHR levels; AHR and ARNT (AHR nuclear translocator) are required for optimal IL-10 production, as shown by impaired IL-10 expression in Ahr-/- NK cells.\",\n      \"method\": \"IL-10 reporter mouse, IL-12 depletion, Ahr-/- knockout mice, in vitro stimulation assays\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reporter mouse and AHR-KO with in vivo and in vitro validation, single lab\",\n      \"pmids\": [\"24403534\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"In Tr1 (regulatory T) cells, IL-10 receptor signaling activates p38 MAPK, which sustains IL-10 production and is required for TR1 cell suppressive activity in vivo. TR1 cells with impaired IL-10 receptor signaling lose their regulatory activity in a murine IBD model, confirmed with human TR1 cells.\",\n      \"method\": \"Double reporter mice (IL-10eGFP/Foxp3mRFP), transgenic mice with impaired IL-10R signaling, in vitro p38 MAPK analysis, human TR1 cell validation\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic model with reporter mice plus signaling pathway identification (p38 MAPK) plus human cell validation, multiple orthogonal methods, replicated in mouse and human\",\n      \"pmids\": [\"28003377\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"In adult SVZ neural progenitors, IL-10 targets Nestin+ progenitors and activates phosphorylation of both ERK and STAT3. Inhibition of MEK/ERK restores neurogenesis to normal levels; silencing STAT3 with lentiviral vectors impairs neurogenesis by blocking IL-10 effects, identifying ERK and STAT3 as downstream effectors of IL-10 in adult neurogenesis.\",\n      \"method\": \"In vitro and in vivo IL-10 treatment, MEK/ERK inhibitor, lentiviral STAT3 shRNA, phospho-ERK and phospho-STAT3 Western blot\",\n      \"journal\": \"Frontiers in cellular neuroscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — pharmacological inhibitor and lentiviral gene silencing in vitro and in vivo, single lab, two pathway effectors identified\",\n      \"pmids\": [\"25762897\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"B1a (CD19+CD11b+CD5+) regulatory B cells rapidly express IL-10 in a TLR2-dependent manner in response to S. aureus; adoptive transfer of B1a cells is protective during acute systemic S. aureus infection in IL-10-deficient hosts, demonstrating that B1a-cell-derived IL-10 is the protective mediator.\",\n      \"method\": \"Flow cytometry, TLR2-dependence analysis, adoptive cell transfer, IL-10-deficient mice\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — adoptive transfer with mechanistic TLR2-dependence identification, single lab\",\n      \"pmids\": [\"28167629\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"IL-10 signaling in adipocytes (via IL-10 receptor alpha, which is highly enriched in mature adipocytes and induced by differentiation, obesity, and aging) represses thermogenic gene transcription by altering chromatin accessibility and inhibiting ATF and C/EBPbeta recruitment to key enhancer regions.\",\n      \"method\": \"ATAC-seq, ChIP-seq, RNA-seq, bone marrow transplantation to define IL-10 source, adipocyte-specific functional assays\",\n      \"journal\": \"Cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — ATAC-seq and ChIP-seq directly show chromatin remodeling and TF displacement, combined with RNA-seq and genetic cell-type assignment, rigorous multi-omics in a single study\",\n      \"pmids\": [\"29249357\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Norepinephrine (NE) blocks proinflammatory cytokine secretion exclusively through the beta2-adrenergic receptor (ADRB2) by rapidly inducing IL-10 secretion from innate cells in response to TLR signals; Adrb2-/- animals show elevated TNF-alpha and reduced IL-10 during endotoxemia, and LPS-mediated lethality in Adrb2-/- mice is rescued by exogenous IL-10.\",\n      \"method\": \"ADRB2 knockout mice, IL-10 rescue experiment, infection models, cytokine ELISA, beta2-specific agonist administration\",\n      \"journal\": \"Brain, behavior, and immunity\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO plus pharmacological rescue with IL-10, multiple in vivo models, single lab\",\n      \"pmids\": [\"30195028\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"The cholesterol biosynthesis pathway regulates IL-10 expression in human Th1 cells; inhibition with atorvastatin or 25-hydroxycholesterol specifically blocks switching to IL-10+ phenotype. Mechanistically, 25-hydroxycholesterol significantly decreases c-Maf, the master transcriptional regulator of IL10 in T cells.\",\n      \"method\": \"Pharmacological inhibition (atorvastatin, 25-hydroxycholesterol), gene expression analysis, pathway analysis of human T cells\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — pharmacological pathway inhibition linked to c-Maf regulation, two inhibitors with consistent results, single lab\",\n      \"pmids\": [\"30700717\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Loss of IL-10 signaling (via IL10RB deficiency) in macrophages results in failure to phosphorylate STAT3 in response to IL-10, failure to reduce LPS-induced inflammatory cytokines, and a striking defect in Salmonella killing. IL-10RB-/- macrophages overproduce PGE2, and pharmacological inhibition of PGE2 synthesis or receptor blockade enhances bacterial killing, revealing a regulatory interaction between IL-10 signaling and PGE2 production.\",\n      \"method\": \"iPSC-derived IL10RB-/- macrophages, gene correction rescue, STAT3 phosphorylation Western blot, bacterial killing assay, PGE2 pharmacological inhibition\",\n      \"journal\": \"Journal of experimental medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — isogenic iPSC model with gene correction rescue, multiple functional readouts (STAT3, bacterial killing, PGE2), rigorous mechanistic dissection in a single study\",\n      \"pmids\": [\"31819956\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"IL-10 inhibits RANKL-induced osteoclast differentiation by promoting MEG3 methylation (suppressing MEG3 lncRNA expression). MEG3 binds STAT1 and prevents STAT1 from binding to IRF8, thereby maintaining IRF8 levels that inhibit osteoclastogenesis; knockdown of MEG3 inhibits osteoclast differentiation and alleviates osteolysis.\",\n      \"method\": \"RNA pull-down, RNA immunoprecipitation, chromatin immunoprecipitation, dual-luciferase assay, MEG3 knockdown, TRAP staining\",\n      \"journal\": \"Cellular signalling\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple molecular interaction assays (RNA pulldown, RIP, ChIP) for MEG3-STAT1-IRF8 axis, single lab\",\n      \"pmids\": [\"35525407\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"IL-10 deficiency leads to increased saturated very long chain (VLC) ceramide accumulation due to decreased mono-unsaturated fatty acid (MUFA) synthesis flux; ceramide synthase 2 (CERS2) deletion limits the exacerbated inflammatory gene expression of IL-10 deficiency in vitro and in vivo. The persistent inflammation mediated by VLC ceramides is largely dependent on sustained activity of the transcription factor REL, and restoring MUFA availability limits VLC ceramide production and the associated inflammation.\",\n      \"method\": \"Genetic deletion of Cers2 in IL-10-deficient background, metabolic flux analysis, gene expression profiling, MUFA supplementation rescue, in vitro and in vivo validation\",\n      \"journal\": \"Nature\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — double genetic deletion epistasis, metabolic flux analysis, rescue experiments with MUFA, in vitro and in vivo validation, published in high-tier journal with multiple orthogonal methods\",\n      \"pmids\": [\"38383790\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"Tetrameric PKM2 activation in LPS-stimulated macrophages induces IL-10 production by increasing glycolytic ATP release; extracellular ATP is converted to adenosine by ectonucleotidases, and adenosine activates the A2a receptor (A2aR) to enhance IL-10 production. This effect is abolished in PKM2-deficient macrophages and is associated with improved mitochondrial health.\",\n      \"method\": \"PKM2 pharmacological activator (TEPP-46), PKM2-deficient macrophages, ectonucleotidase pathway analysis, A2aR pharmacology, mitochondrial assays\",\n      \"journal\": \"Cell reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO (PKM2-deficient) plus pharmacological pathway dissection (ectonucleotidase, A2aR), single lab, mechanistic chain established\",\n      \"pmids\": [\"39772395\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"IL-10 is an intercalated homodimeric cytokine that signals through a heterodimeric receptor complex (IL-10R1/IL-10R2) to activate JAK1/TYK2 and primarily STAT3 (and STAT1 under IFN-gamma priming), driving anti-inflammatory gene expression programs including SOCS3 induction, HDAC3-mediated histone deacetylation of proinflammatory gene promoters (e.g., Il12b), and suppression of VLC ceramide accumulation via fatty acid desaturation; its transcription is directly controlled by c-Maf binding to a MARE element in the IL-10 promoter, is regulated stochastically via chromatin acetylation and TCR signal strength in T cells, and can be induced by upstream signals including PKM2-derived glycolytic ATP→adenosine→A2aR, beta2-adrenergic receptor activation, and cholesterol biosynthesis pathway intermediates, with key functional consequences including suppression of antigen-presenting cell maturation, inhibition of proinflammatory cytokine production, promotion of M2 macrophage polarization, regulation of adipocyte thermogenesis via chromatin remodeling, and enhancement of macrophage bacterial killing through restraint of PGE2 overproduction.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"IL-10 is a secreted homodimeric cytokine that functions as a central restraint on inflammation, suppressing antigen-presenting cell maturation and proinflammatory cytokine output while promoting tissue-protective immune programs [#4, #6]. Structurally it is an intercalated homodimer of four-helix-bundle protomers that engages a heterodimeric receptor (IL-10R1/IL-10R2), with defined binding sites I and II on the cytokine and receptor [#13]. Receptor engagement activates JAK-STAT signaling, predominantly STAT3, and induces SOCS family members (SOCS2/SOCS3) that dampen IFN-driven STAT1 signaling [#2]; STAT3 phosphorylation is the essential output, since loss of IL-10RB abolishes STAT3 activation, fails to suppress LPS-induced cytokines, and impairs bacterial killing through PGE2 overproduction [#25]. The anti-inflammatory transcriptional program operates partly through chromatin-level repression: IL-10 recruits HDAC3 to deacetylate histones at the Il12b promoter, terminating sustained proinflammatory transcription [#16], and in adipocytes IL-10 receptor signaling remodels chromatin accessibility to displace ATF and C/EBPbeta from thermogenic enhancers [#22]. IL-10 also reprograms macrophages toward an M2 phenotype that supports tissue repair [#15], and restrains chronic inflammation metabolically by sustaining mono-unsaturated fatty acid flux to prevent REL-dependent very-long-chain ceramide accumulation [#27]. IL-10 transcription in T cells is directly driven by c-Maf binding a MARE element in the IL10 promoter [#12] and is gated stochastically by chromatin acetylation and TCR signal strength [#11]. Diverse upstream inputs converge on IL-10 induction, including beta2-adrenergic receptor signaling [#23], a PKM2-glycolytic-ATP-to-adenosine/A2aR axis [#28], cholesterol biosynthesis intermediates acting via c-Maf [#24], and AHR signaling in NK cells [#18].\",\n  \"teleology\": [\n    {\n      \"year\": 1990,\n      \"claim\": \"Established IL-10 (CSIF/B-TCGF) as a defined cytokine with distinct functional epitopes, separating its co-stimulatory and cytokine-synthesis-inhibiting activities.\",\n      \"evidence\": \"Neutralizing mAb inhibition and recombinant protein thymocyte proliferation assays\",\n      \"pmids\": [\"2124236\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Receptor and signaling mechanism not yet defined\", \"Epitope mapping not structurally resolved at this stage\"]\n    },\n    {\n      \"year\": 2000,\n      \"claim\": \"Linked IL-10 to the JAK-STAT axis by showing it selectively activates STAT3 and induces SOCS proteins that suppress IFN-driven STAT1 signaling, defining its anti-inflammatory signaling output.\",\n      \"evidence\": \"In vivo IL-10 injection, RT-PCR, and reporter assays with SOCS overexpression in hepatic cells\",\n      \"pmids\": [\"11034314\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct receptor-JAK coupling not assayed\", \"STAT3 versus STAT1 balance under priming not addressed\"]\n    },\n    {\n      \"year\": 2001,\n      \"claim\": \"Demonstrated that IL-10 acts as an autocrine brake on dendritic cell maturation and that endogenous IL-10 suppresses prostaglandin production indirectly by limiting proinflammatory cytokines.\",\n      \"evidence\": \"Neutralizing antibody DC cultures and IL-10 knockout macrophages with cytokine neutralization epistasis\",\n      \"pmids\": [\"11254683\", \"11160331\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular mediators downstream of STAT3 not identified\", \"Direct versus indirect COX-2 regulation only inferred from epistasis\"]\n    },\n    {\n      \"year\": 2003,\n      \"claim\": \"Revealed that IFN-gamma priming reprograms IL-10 responses by shifting STAT activation from STAT3 to STAT1, converting an anti-inflammatory program to a proinflammatory one.\",\n      \"evidence\": \"Gene expression profiling and STAT phosphorylation Western blot in macrophages\",\n      \"pmids\": [\"14607900\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanism of STAT selection not resolved\", \"Receptor-level basis of the switch unknown\"]\n    },\n    {\n      \"year\": 2006,\n      \"claim\": \"Showed IL-10 signaling is actively modulated at the receptor by PKCbeta-driven IL-10R internalization, identifying a route by which pathogen contact silences IL-10 responses.\",\n      \"evidence\": \"Receptor internalization assays with PKC inhibitors in TLR2-deficient cells\",\n      \"pmids\": [\"16585572\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Structural basis of internalization not defined\", \"Physiological scope beyond zymosan untested\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Identified c-Maf as the direct transcriptional driver of IL-10 via MARE-element binding in the promoter, defining the master regulator of IL-10 transcription in T cells.\",\n      \"evidence\": \"ChIP promoter binding, retroviral gain-of-function, reporter assays, multiple STAT knockouts\",\n      \"pmids\": [\"19414776\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Cofactors at the MARE element not enumerated\", \"Cell-type-specific differences in c-Maf dependence not fully mapped\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Resolved IL-10 as an intercalated four-helix-bundle homodimer engaging IL-10R1/IL-10R2 at defined sites, providing the structural framework for receptor assembly.\",\n      \"evidence\": \"Crystal structures of IL-10 and IL-10/sIL-10R1 complexes\",\n      \"pmids\": [\"20846897\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Full ternary signaling complex with IL-10R2 not captured here\", \"JAK recruitment geometry not addressed\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Established that IL-10 transcription is epigenetically gated, with monoallelic stochastic expression controlled by chromatin acetylation and TCR signal strength, and repressible by IL-23-driven promoter inaccessibility.\",\n      \"evidence\": \"Dual-allele reporter mice, ChIP and promoter accessibility assays, cytokine blockade\",\n      \"pmids\": [\"17015721\", \"22158873\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Chromatin-modifying enzymes at the IL10 locus not fully identified\", \"Quantitative relationship between TCR strength and acetylation incomplete\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Defined a chromatin-level effector mechanism: IL-10 represses sustained Il12b transcription by recruiting HDAC3 to deacetylate the promoter, and promotes M1-to-M2 macrophage switching in tissue repair.\",\n      \"evidence\": \"ChIP for acetylated H4, HDAC3 shRNA and inhibitors in IL-10 KO macrophages; IL-10 KO mice with macrophage-myoblast coculture\",\n      \"pmids\": [\"22786766\", \"22933625\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Link from STAT3 to HDAC3 recruitment not mapped\", \"Genes beyond Il12b under HDAC3 control not catalogued\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Showed IL-10 receptor signaling sustains its own producers (Tr1 cells) via p38 MAPK and drives non-canonical ERK/STAT3 effects in neural progenitors, broadening IL-10 outputs beyond canonical STAT3.\",\n      \"evidence\": \"Reporter and impaired-IL-10R transgenic mice with human Tr1 validation; MEK/ERK inhibitor and lentiviral STAT3 shRNA in SVZ progenitors\",\n      \"pmids\": [\"28003377\", \"25762897\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Receptor-to-p38 coupling mechanism not defined\", \"Tissue specificity of ERK versus STAT3 outputs unresolved\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Extended IL-10 function to metabolic tissue by demonstrating it represses adipocyte thermogenic transcription through chromatin remodeling and transcription factor displacement.\",\n      \"evidence\": \"ATAC-seq, ChIP-seq, RNA-seq, and bone marrow transplantation in adipocytes\",\n      \"pmids\": [\"29249357\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"STAT3-to-chromatin-remodeling connection in adipocytes not mechanistically linked\", \"Enzymatic basis of accessibility change not identified\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Provided isogenic genetic proof that IL-10RB-STAT3 signaling controls macrophage bacterial killing by restraining PGE2 overproduction, unifying the anti-inflammatory and antimicrobial roles.\",\n      \"evidence\": \"iPSC-derived IL10RB-/- macrophages with gene-correction rescue, STAT3 Western blot, bacterial killing and PGE2 inhibition\",\n      \"pmids\": [\"31819956\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"STAT3 target genes controlling PGE2 synthesis not enumerated\", \"Generalizability across pathogens beyond Salmonella untested\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Defined a metabolic axis of IL-10 anti-inflammatory action: IL-10 sustains MUFA flux to prevent REL-dependent very-long-chain ceramide accumulation, with CERS2 as the key node.\",\n      \"evidence\": \"Cers2/IL-10 double genetic deletion, metabolic flux analysis, MUFA rescue in vitro and in vivo\",\n      \"pmids\": [\"38383790\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How IL-10 signaling controls MUFA synthesis flux mechanistically unresolved\", \"Connection between ceramides and REL activation not fully detailed\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Identified a glycolytic-metabolic input to IL-10 induction, where tetrameric PKM2 raises ATP release that is converted to adenosine to activate A2aR and drive IL-10 production.\",\n      \"evidence\": \"PKM2 activator TEPP-46, PKM2-deficient macrophages, ectonucleotidase and A2aR pharmacology\",\n      \"pmids\": [\"39772395\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Transcriptional link from A2aR to the IL10 locus not defined\", \"Relative contribution among the many upstream IL-10 inducers unquantified\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How the canonical STAT3 signal is mechanistically translated into the diverse chromatin-remodeling, metabolic, and HDAC3-dependent effector programs across cell types remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No unified map from receptor engagement to cell-type-specific transcriptional outcomes\", \"Integration of the multiple upstream inducers into a single regulatory logic is incomplete\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0048018\", \"supporting_discovery_ids\": [13]},\n      {\"term_id\": \"GO:0060089\", \"supporting_discovery_ids\": [2, 25]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005576\", \"supporting_discovery_ids\": [1, 23]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-168256\", \"supporting_discovery_ids\": [4, 6, 16, 25]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [2, 25, 19]},\n      {\"term_id\": \"R-HSA-4839726\", \"supporting_discovery_ids\": [16, 22, 14]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"IL10RA\", \"IL10RB\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":7,"faith_total":7,"faith_pct":100.0}}