{"gene":"TGFA","run_date":"2026-04-28T21:42:59","timeline":{"discoveries":[{"year":2007,"finding":"Concomitant pancreatic expression of TGFα (Tgfa) and oncogenic Kras(G12D) synergistically accelerates progression of mPanIN lesions to metastatic pancreatic cancer and drives development of cystic papillary lesions (IPMN), placing EGFR/TGFα signaling upstream of IPMN development in cooperation with Kras","method":"Genetic epistasis — transgenic mouse cross (Elastase-Tgfa × p48(+/Cre);Kras(+/LSL-G12D)) with histopathological and microarray analysis","journal":"Cancer cell","confidence":"High","confidence_rationale":"Tier 2 — clean genetic epistasis in vivo with defined histopathological and transcriptomic phenotype, replicated across lesion types","pmids":["17785207"],"is_preprint":false},{"year":2010,"finding":"TGFα stimulation of NPC cells (via EGFR) triggers tyrosine phosphorylation of downstream substrates including ANXA3, KRT8, and KRT18, identifying these as novel components of the EGFR phosphotyrosine signaling network activated by TGFα","method":"Functional proteomics: 2-DE, 2-D western blotting, mass spectrometry, and IP-western blotting of TGFα-treated CNE2 cells","journal":"Medical oncology","confidence":"Medium","confidence_rationale":"Tier 2 — mass spectrometry identification validated by IP-western, single lab","pmids":["20049563"],"is_preprint":false},{"year":2010,"finding":"TGFA is secreted by papillary thyroid carcinoma (PTC) cells and activates EGFR on target cells, stimulating cell proliferation through PI3K/AKT activation independently of MEK/ERK signaling in BRAF-mutant PTC cells","method":"Conditioned medium transfer to HeLa cells, biochemical EGFR activation assays (ERK and AKT phosphorylation), cell proliferation assay with TGFA stimulation in NIM-1 PTC cells","journal":"PloS one","confidence":"Medium","confidence_rationale":"Tier 2 — multiple orthogonal in vitro methods (conditioned media, receptor activation, pathway inhibition), single lab","pmids":["20877637"],"is_preprint":false},{"year":2016,"finding":"Triiodothyronine (T3) induces TGFA mRNA expression in MCF7 breast cancer cells through activation of PI3K; this induction is blocked by the PI3K inhibitor LY294002 and requires active gene transcription","method":"RT-PCR with pharmacological inhibitors (actinomycin D, cycloheximide, LY294002) in T3-treated MCF7 cells","journal":"Life sciences","confidence":"Medium","confidence_rationale":"Tier 2 — multiple inhibitor conditions tested, single lab","pmids":["27094789"],"is_preprint":false},{"year":2019,"finding":"T3-induced upregulation of TGFA mRNA in MCF7 cells is independent of the MAPK/ERK pathway (PD98059 inhibition does not block it) but requires RNA Polymerase II activity (α-amanitin inhibition modulates the effect)","method":"RT-PCR with pharmacological inhibitors (α-amanitin, PD98059) in T3-treated MCF7 cells","journal":"Archives of endocrinology and metabolism","confidence":"Medium","confidence_rationale":"Tier 2 — pathway dissection with orthogonal inhibitors, replicates and extends prior finding, single lab","pmids":["30916164"],"is_preprint":false},{"year":2016,"finding":"MALAT1 lncRNA promotes osteosarcoma cell growth by acting as a competing endogenous RNA (ceRNA) for MIR376A, thereby de-repressing TGFA expression; direct binding between MIR376A and both MALAT1 3'-UTR and TGFA 3'-UTR was demonstrated","method":"RNA pulldown, dual-luciferase reporter assay, qRT-PCR, western blot, knockdown/overexpression in OS cell lines","journal":"Oncotarget","confidence":"Medium","confidence_rationale":"Tier 2 — direct binding validated by luciferase assay and pulldown, single lab","pmids":["27458156"],"is_preprint":false},{"year":2017,"finding":"miR-376c directly targets the 3'-UTR of TGFA and suppresses TGFA expression; IL-1β-driven NF-κB signaling downregulates miR-376c, leading to increased TGFA protein and osteosarcoma cell growth","method":"Luciferase reporter assay, western blot, miR-376c mimic/inhibitor transfection, NF-κB inhibition in osteosarcoma cells","journal":"Die Pharmazie","confidence":"Medium","confidence_rationale":"Tier 2 — direct 3'-UTR targeting confirmed by luciferase, pathway placed by NF-κB inhibitor, single lab","pmids":["29441940"],"is_preprint":false},{"year":2017,"finding":"miR-137 directly targets TGFA mRNA and suppresses its expression, mediating the tumor-suppressive effect of miR-137 on NSCLC cell proliferation","method":"Dual-luciferase reporter assay confirming miR-137 binding to TGFA 3'-UTR; western blot for TGFA protein; MTT and flow cytometry upon miR-137 overexpression/silencing and TGFA knockdown","journal":"European review for medical and pharmacological sciences","confidence":"Medium","confidence_rationale":"Tier 2 — direct target validated by luciferase and western blot, single lab","pmids":["28239819"],"is_preprint":false},{"year":2021,"finding":"circTAF4B sponges miR-1298-5p to upregulate TGFA expression, promoting bladder cancer cell proliferation, migration, invasion, and EMT; direct binding between miR-1298-5p and circTAF4B and between miR-1298-5p and TGFA 3'-UTR was validated","method":"RNA pull-down, dual-luciferase reporter assay, nuclear/cytoplasmic fractionation, CCK-8, colony formation, wound healing, Transwell, western blot, and mouse xenograft","journal":"Frontiers in oncology","confidence":"Medium","confidence_rationale":"Tier 2 — multiple orthogonal methods including in vivo xenograft, single lab","pmids":["34322376"],"is_preprint":false},{"year":2021,"finding":"miR-374b directly targets and negatively regulates TGFA in breast cancer cells; TGFA knockdown suppresses cell proliferation, 3D growth, invasion, and colony formation, and overexpression of TGFA rescues the phenotype caused by miR-374b overexpression","method":"Bioinformatics prediction, luciferase reporter assay, gain/loss-of-function experiments in vitro and in vivo (mouse tumor growth), rescue experiments with TGFA overexpression","journal":"Carcinogenesis","confidence":"Medium","confidence_rationale":"Tier 2 — target validated by luciferase and rescue experiments in vivo and in vitro, single lab","pmids":["33480984"],"is_preprint":false},{"year":2021,"finding":"LINC00857 functions as a ceRNA to sponge miR-340-5p, thereby upregulating TGFA and promoting PAAD cell proliferation, invasion, and migration; direct interactions between LINC00857/miR-340-5p and miR-340-5p/TGFA were validated","method":"Dual-luciferase reporter assay, CCK-8, colony formation, Transwell assay, TCGA database analysis","journal":"PloS one","confidence":"Medium","confidence_rationale":"Tier 3 — direct binding confirmed by luciferase, functional rescue experiments, single lab","pmids":["33661995"],"is_preprint":false},{"year":2021,"finding":"Cisplatin inhibits osteosarcoma (Saos-2) cell proliferation by upregulating miR-376c, which directly targets the TGFA 3'-UTR and suppresses TGFA expression; TGFA overexpression reverses cisplatin-induced growth inhibition","method":"Luciferase reporter assay, qRT-PCR, western blot, MTT, BrdU assay, TGFA shRNA and ORF clone transfection, miR-376c mimic/sponge transfection","journal":"Bosnian journal of basic medical sciences","confidence":"Medium","confidence_rationale":"Tier 2 — direct 3'-UTR targeting confirmed by luciferase, functional rescue experiments, single lab","pmids":["32020849"],"is_preprint":false},{"year":2022,"finding":"circRTN1 sponges miR-431-5p to upregulate TGFA expression, promoting thyroid cancer cell proliferation, migration, and invasion; direct binding between miR-431-5p and circRTN1, and between miR-431-5p and TGFA 3'-UTR were validated","method":"Dual-luciferase reporter assay, RIP assay, qRT-PCR, western blot, colony formation, EdU, Transwell, flow cytometry, and xenograft tumor assay","journal":"Hormones","confidence":"Medium","confidence_rationale":"Tier 2 — direct binding validated by luciferase and RIP, in vivo xenograft confirmation, single lab","pmids":["35804263"],"is_preprint":false},{"year":2022,"finding":"LASTR lncRNA promotes lung cancer cell proliferation and metastasis through the miR-137/TGFA axis, activating the PI3K/AKT signaling pathway downstream of TGFA","method":"Knockdown of LASTR, qRT-PCR, cell proliferation/metastasis assays, western blotting for PI3K/AKT pathway components, GSEA, bioinformatic analysis","journal":"Journal of Cancer","confidence":"Low","confidence_rationale":"Tier 3 — pathway placement based on western blot of downstream effectors and GSEA, mechanistic link to TGFA inferred from miR-137 axis, single lab","pmids":["35281858"],"is_preprint":false},{"year":2023,"finding":"circ_0006667 sponges miR-7-5p to upregulate TGFA expression in retinal pigment epithelial cells; this axis promotes high-glucose-induced cell dysfunction (suppressed proliferation, increased apoptosis) in a diabetic retinopathy model","method":"Dual-luciferase reporter assay, RIP assay, RT-qPCR, western blot, MTT, EdU, flow cytometry in ARPE-19 cells","journal":"International ophthalmology","confidence":"Medium","confidence_rationale":"Tier 2 — direct binding validated by both luciferase and RIP assays, single lab","pmids":["36715959"],"is_preprint":false},{"year":2012,"finding":"IRF6 and TGFA interact genetically in orofacial cleft susceptibility; Tgfa expression in murine palatal tissue requires Irf6 (Tgfa was not expressed in Irf6 knockout mice during palatogenesis), placing Irf6 upstream of Tgfa in the palatogenesis pathway","method":"Genetic interaction analysis in four human cohorts plus Irf6 knockout mouse model with expression analysis of Tgfa in palatal tissue","journal":"PloS one","confidence":"Medium","confidence_rationale":"Tier 2 — mouse knockout with direct expression analysis of Tgfa, replicated across multiple human cohorts","pmids":["23029012"],"is_preprint":false},{"year":1999,"finding":"Human TGFA is composed of six exons; several sequence variants in conserved coding and regulatory segments were identified as rare candidate causes for orofacial clefting, supporting TGFA's role in facial morphogenesis; high-level TGFA expression occurs in medial edge palatal shelf epithelium at the time of shelf fusion in mice","method":"Genomic sequencing of TGFA (all exons, splice junctions, conserved 3'-UTR) in 250 individuals with NS-CL/P or NS-CPO; conformational analysis (SSCP)","journal":"Genomics","confidence":"Medium","confidence_rationale":"Tier 2 — direct mutation screening with biological context from mouse expression data, moderate sample size","pmids":["10552925"],"is_preprint":false},{"year":2025,"finding":"In the extrahepatic bile duct (mouse), Tgfa is expressed by cholangiocytes at homeostasis and is upregulated after bile duct obstruction; increased Tgfa (along with other EGFR ligands) is associated with injury-induced biliary hyperproliferation that is EGFR-dependent","method":"Mouse bile duct ligation model, transcriptomic analysis, immunohistochemistry, biliary organoid studies with EGFR ligand stimulation and inhibition","journal":"bioRxiv","confidence":"Low","confidence_rationale":"Tier 3 — localization and upregulation data from mouse model and organoids, Tgfa role inferred from EGFR dependence of proliferation, preprint","pmids":[],"is_preprint":true}],"current_model":"TGFA encodes a transmembrane precursor that is proteolytically processed to release a soluble EGF-like ligand that activates EGFR, thereby driving downstream PI3K/AKT signaling (independently of MEK/ERK in certain cancer contexts); its expression is regulated transcriptionally by PI3K (downstream of T3/thyroid hormone) and post-transcriptionally by multiple miRNAs (miR-137, miR-376c, miR-374b, miR-340-5p, miR-1298-5p, miR-431-5p, miR-7-5p) whose activity is in turn modulated by competing lncRNAs and circRNAs; in vivo, TGFA cooperates with oncogenic KRAS to promote pancreatic carcinogenesis through EGFR signaling, and its expression in palatal epithelium during fusion is regulated upstream by IRF6."},"narrative":{"teleology":[{"year":1999,"claim":"Establishing that TGFA is expressed in the critical palatal epithelium at the time of shelf fusion and harbors rare coding/regulatory variants in cleft patients answered whether TGFA has a direct developmental role in craniofacial morphogenesis.","evidence":"Genomic sequencing of all TGFA exons/regulatory regions in 250 cleft individuals plus mouse palatal expression mapping","pmids":["10552925"],"confidence":"Medium","gaps":["Functional validation of individual variants not performed","Causal mechanism linking TGFA variants to cleft pathogenesis not demonstrated","Role of TGFA relative to other EGFR ligands in palatogenesis unclear"]},{"year":2007,"claim":"Demonstrating that pancreatic co-expression of Tgfa and oncogenic Kras synergistically accelerates progression to metastatic cancer and IPMN established TGFA-EGFR signaling as a cooperating oncogenic pathway with KRAS in pancreatic tumorigenesis.","evidence":"Genetic cross of Elastase-Tgfa and p48-Cre;KrasG12D transgenic mice with histopathological and transcriptomic analysis","pmids":["17785207"],"confidence":"High","gaps":["Whether TGFA is the critical endogenous EGFR ligand versus other ligands not resolved","Downstream effector pathways mediating synergy not dissected"]},{"year":2010,"claim":"Showing that secreted TGFA activates EGFR to drive PI3K/AKT-dependent proliferation independently of MEK/ERK in BRAF-mutant PTC cells, and identifying novel phosphotyrosine substrates (ANXA3, KRT8, KRT18) in TGFA-treated cells, clarified the signaling branch selectivity and substrate repertoire downstream of TGFA-EGFR.","evidence":"Conditioned-medium transfer with pathway inhibitors in thyroid cancer cells; 2-DE/MS phosphoproteomics in TGFA-treated NPC cells","pmids":["20877637","20049563"],"confidence":"Medium","gaps":["In vivo relevance of PI3K/AKT-selective signaling not tested","ANXA3/KRT phosphorylation functional consequences unknown","Generalizability beyond BRAF-mutant context unclear"]},{"year":2012,"claim":"Placing IRF6 upstream of TGFA in palatogenesis — Tgfa expression is absent in Irf6-knockout palatal tissue — resolved how TGFA expression is regulated during craniofacial development and explained the genetic interaction between IRF6 and TGFA in orofacial cleft susceptibility.","evidence":"Irf6 knockout mouse palatal tissue expression analysis combined with genetic interaction testing in four human cohorts","pmids":["23029012"],"confidence":"Medium","gaps":["Whether IRF6 directly binds the TGFA promoter or acts indirectly not determined","Other IRF6 targets that may contribute to clefting not excluded"]},{"year":2016,"claim":"Discovering that T3 induces TGFA transcription through PI3K (blocked by LY294002) independently of MAPK/ERK and that lncRNA MALAT1 sponges miR-376c to de-repress TGFA established that TGFA expression is controlled at both the transcriptional and post-transcriptional levels by distinct regulatory axes.","evidence":"RT-PCR with PI3K/MAPK inhibitors in T3-treated MCF7 cells; RNA pulldown and luciferase assays for MALAT1-miR376A-TGFA axis in osteosarcoma cells","pmids":["27094789","27458156"],"confidence":"Medium","gaps":["Identity of the transcription factor linking PI3K to TGFA promoter unknown","Whether MALAT1-miR-376c axis operates outside osteosarcoma not tested"]},{"year":2017,"claim":"Validation that miR-137 and miR-376c directly target the TGFA 3′-UTR, with miR-376c itself regulated by NF-κB/IL-1β signaling, expanded the inventory of TGFA-targeting miRNAs and linked inflammatory signaling to post-transcriptional TGFA de-repression.","evidence":"Luciferase reporter assays confirming direct miRNA binding to TGFA 3′-UTR in NSCLC and osteosarcoma cells; NF-κB inhibitor experiments","pmids":["28239819","29441940"],"confidence":"Medium","gaps":["In vivo validation of miR-137 and miR-376c regulation of TGFA lacking","Relative contribution of each miRNA to TGFA regulation in any single tissue unknown"]},{"year":2021,"claim":"Multiple studies converged to show that TGFA is a common effector of diverse ceRNA networks — circTAF4B/miR-1298-5p in bladder cancer, miR-374b in breast cancer, LINC00857/miR-340-5p in PAAD, and cisplatin-induced miR-376c in osteosarcoma — establishing that TGFA upregulation is a recurrent oncogenic output of miRNA sponging across cancer types.","evidence":"Luciferase reporter, RIP, and rescue experiments across bladder cancer, breast cancer, PAAD, and osteosarcoma cell lines with xenograft confirmation","pmids":["34322376","33480984","33661995","32020849"],"confidence":"Medium","gaps":["No systematic comparison of which ceRNA axis dominates in a given tissue","Whether targeting TGFA directly is therapeutically superior to targeting individual ceRNAs unknown","Endogenous stoichiometry of ceRNA competition not measured"]},{"year":2022,"claim":"Further ceRNA axes (circRTN1/miR-431-5p in thyroid cancer, LASTR/miR-137 in lung cancer) converging on TGFA with downstream PI3K/AKT activation reinforced TGFA as a nodal oncogenic target regulated by competing noncoding RNAs.","evidence":"Luciferase, RIP, xenograft assays in thyroid cancer cells; western blot for PI3K/AKT in lung cancer cells","pmids":["35804263","35281858"],"confidence":"Medium","gaps":["LASTR/miR-137/TGFA axis is low confidence with pathway placement based only on western blot","Direct demonstration that TGFA mediates PI3K/AKT activation in the LASTR axis lacking"]},{"year":2023,"claim":"Identification of circ_0006667/miR-7-5p/TGFA axis in retinal pigment epithelium under high-glucose conditions extended TGFA's ceRNA-regulated biology beyond cancer into diabetic retinopathy.","evidence":"Luciferase and RIP assays in ARPE-19 cells under high-glucose conditions","pmids":["36715959"],"confidence":"Medium","gaps":["In vivo diabetic retinopathy model not used","Functional contribution of TGFA relative to other high-glucose effectors not quantified"]},{"year":null,"claim":"The precise proteolytic processing mechanism of the TGFA transmembrane precursor, the identity of the metalloprotease(s) principally responsible in each tissue context, and whether TGFA signals in a juxtacrine versus paracrine mode in specific developmental and disease settings remain unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No structural model of TGFA-EGFR complex from these studies","Relative contributions of TGFA versus other EGFR ligands in any single in vivo context not delineated","Therapeutic targeting of TGFA specifically (versus EGFR) not explored"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0048018","term_label":"receptor ligand activity","supporting_discovery_ids":[0,2,8,9,12]}],"localization":[{"term_id":"GO:0005576","term_label":"extracellular region","supporting_discovery_ids":[2,16]}],"pathway":[{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[0,1,2,13]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[15,16]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[0,2,8,9,10,12]}],"complexes":[],"partners":["EGFR","IRF6","KRAS"],"other_free_text":[]},"mechanistic_narrative":"TGFA encodes transforming growth factor-alpha, a secreted EGF-family ligand that activates EGFR to drive cell proliferation and survival through PI3K/AKT signaling, functioning as a key mitogenic factor in epithelial tissues during development and in cancer. In pancreatic tumorigenesis, TGFA cooperates with oncogenic KRAS to accelerate progression from preneoplastic lesions to metastatic cancer and intraductal papillary mucinous neoplasm [PMID:17785207], while in BRAF-mutant thyroid cancer cells TGFA-EGFR signaling promotes proliferation through PI3K/AKT independently of MEK/ERK [PMID:20877637]. TGFA expression is regulated transcriptionally by IRF6 during palatogenesis and by T3-activated PI3K in breast cancer cells [PMID:23029012, PMID:27094789], and post-transcriptionally by multiple miRNAs (miR-137, miR-376c, miR-374b, miR-340-5p, miR-1298-5p, miR-431-5p, miR-7-5p) whose suppressive effects are antagonized by competing endogenous lncRNAs and circRNAs [PMID:27458156, PMID:29441940, PMID:28239819, PMID:33480984]. Variants in TGFA coding and regulatory regions have been identified in individuals with nonsyndromic orofacial clefting, and Tgfa expression in medial edge palatal epithelium at the time of shelf fusion supports a role in craniofacial morphogenesis [PMID:10552925, PMID:23029012]."},"prefetch_data":{"uniprot":{"accession":"P01135","full_name":"Protransforming growth factor alpha","aliases":[],"length_aa":160,"mass_kda":17.0,"function":"TGF alpha is a mitogenic polypeptide that is able to bind to the EGF receptor/EGFR and to act synergistically with TGF beta to promote anchorage-independent cell proliferation in soft agar","subcellular_location":"Cell membrane","url":"https://www.uniprot.org/uniprotkb/P01135/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/TGFA","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/TGFA","total_profiled":1310},"omim":[{"mim_id":"618258","title":"SEC11 HOMOLOG A, SIGNAL PEPTIDASE COMPLEX SUBUNIT; SEC11A","url":"https://www.omim.org/entry/618258"},{"mim_id":"617515","title":"RHOMBOID DOMAIN-CONTAINING 1; RHBDD1","url":"https://www.omim.org/entry/617515"},{"mim_id":"615943","title":"MEMBRANE-ASSOCIATED GUANYLATE KINASE, WW AND PDZ DOMAINS-CONTAINING, 3; MAGI3","url":"https://www.omim.org/entry/615943"},{"mim_id":"614719","title":"POTASSIUM CHANNEL MODULATORY FACTOR 1; KCMF1","url":"https://www.omim.org/entry/614719"},{"mim_id":"614206","title":"CHROMATIN TARGET OF PRMT1; CHTOP","url":"https://www.omim.org/entry/614206"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Vesicles","reliability":"Approved"}],"tissue_specificity":"Tissue enhanced","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"brain","ntpm":24.5},{"tissue":"esophagus","ntpm":24.0}],"url":"https://www.proteinatlas.org/search/TGFA"},"hgnc":{"alias_symbol":[],"prev_symbol":[]},"alphafold":{"accession":"P01135","domains":[{"cath_id":"2.10.25.10","chopping":"41-85","consensus_level":"medium","plddt":75.9727,"start":41,"end":85},{"cath_id":"1.20.5","chopping":"87-136","consensus_level":"medium","plddt":72.9792,"start":87,"end":136}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/P01135","model_url":"https://alphafold.ebi.ac.uk/files/AF-P01135-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-P01135-F1-predicted_aligned_error_v6.png","plddt_mean":66.44},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=TGFA","jax_strain_url":"https://www.jax.org/strain/search?query=TGFA"},"sequence":{"accession":"P01135","fasta_url":"https://rest.uniprot.org/uniprotkb/P01135.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/P01135/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/P01135"}},"corpus_meta":[{"pmid":"17785207","id":"PMC_17785207","title":"Concomitant pancreatic activation of Kras(G12D) and Tgfa results in cystic papillary neoplasms reminiscent of human IPMN.","date":"2007","source":"Cancer cell","url":"https://pubmed.ncbi.nlm.nih.gov/17785207","citation_count":126,"is_preprint":false},{"pmid":"15329380","id":"PMC_15329380","title":"MSX1, PAX9, and TGFA contribute to tooth agenesis in humans.","date":"2004","source":"Journal of dental research","url":"https://pubmed.ncbi.nlm.nih.gov/15329380","citation_count":124,"is_preprint":false},{"pmid":"9003904","id":"PMC_9003904","title":"Studies of the candidate genes TGFB2, MSX1, TGFA, and TGFB3 in the etiology of cleft lip and palate in the Philippines.","date":"1997","source":"The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association","url":"https://pubmed.ncbi.nlm.nih.gov/9003904","citation_count":115,"is_preprint":false},{"pmid":"12652527","id":"PMC_12652527","title":"Variants of developmental genes (TGFA, TGFB3, and MSX1) and their associations with orofacial clefts: a case-parent triad analysis.","date":"2003","source":"Genetic epidemiology","url":"https://pubmed.ncbi.nlm.nih.gov/12652527","citation_count":72,"is_preprint":false},{"pmid":"15643916","id":"PMC_15643916","title":"Oral clefts, maternal smoking, and TGFA: a meta-analysis of gene-environment interaction.","date":"2005","source":"The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association","url":"https://pubmed.ncbi.nlm.nih.gov/15643916","citation_count":65,"is_preprint":false},{"pmid":"9345615","id":"PMC_9345615","title":"Testing for interaction between maternal smoking and TGFA genotype among oral cleft cases born in Maryland 1992-1996.","date":"1997","source":"The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association","url":"https://pubmed.ncbi.nlm.nih.gov/9345615","citation_count":65,"is_preprint":false},{"pmid":"27458156","id":"PMC_27458156","title":"MALAT1 promotes osteosarcoma development by targeting TGFA via MIR376A.","date":"2016","source":"Oncotarget","url":"https://pubmed.ncbi.nlm.nih.gov/27458156","citation_count":56,"is_preprint":false},{"pmid":"7814148","id":"PMC_7814148","title":"Association of transforming growth factor alpha (TGFA) and its precursors with malignant change in Barrett's epithelium: biological and clinical variables.","date":"1995","source":"International journal of cancer","url":"https://pubmed.ncbi.nlm.nih.gov/7814148","citation_count":55,"is_preprint":false},{"pmid":"23029012","id":"PMC_23029012","title":"Interaction between IRF6 and TGFA genes contribute to the risk of nonsyndromic cleft lip/palate.","date":"2012","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/23029012","citation_count":43,"is_preprint":false},{"pmid":"15054400","id":"PMC_15054400","title":"Maternal MTHFR interacts with the offspring's BCL3 genotypes, but not with TGFA, in increasing risk to nonsyndromic cleft lip with or without cleft palate.","date":"2004","source":"European journal of human genetics : EJHG","url":"https://pubmed.ncbi.nlm.nih.gov/15054400","citation_count":43,"is_preprint":false},{"pmid":"7977355","id":"PMC_7977355","title":"Evidence, from family studies, for linkage disequilibrium between TGFA and a gene for nonsyndromic cleft lip with or without cleft palate.","date":"1994","source":"American journal of human genetics","url":"https://pubmed.ncbi.nlm.nih.gov/7977355","citation_count":43,"is_preprint":false},{"pmid":"19444471","id":"PMC_19444471","title":"Evidence that TGFA influences risk to cleft lip with/without cleft palate through unconventional genetic mechanisms.","date":"2009","source":"Human 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genomics","url":"https://pubmed.ncbi.nlm.nih.gov/15864136","citation_count":27,"is_preprint":false},{"pmid":"20082468","id":"PMC_20082468","title":"MTHFR, TGFB3, and TGFA polymorphisms and their association with the risk of non-syndromic cleft lip and cleft palate in China.","date":"2010","source":"American journal of medical genetics. 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biotechnology","url":"https://pubmed.ncbi.nlm.nih.gov/35633991","citation_count":7,"is_preprint":false},{"pmid":"19196314","id":"PMC_19196314","title":"Transforming growth factor-alfa gene (TGFA), human tooth agenesis, and evidence of segmental uniparental isodisomy.","date":"2009","source":"European journal of oral sciences","url":"https://pubmed.ncbi.nlm.nih.gov/19196314","citation_count":6,"is_preprint":false},{"pmid":"33200192","id":"PMC_33200192","title":"IRF6, MSX1, TGFA, dental anomalies, and skeletal malocclusion.","date":"2021","source":"European journal of orthodontics","url":"https://pubmed.ncbi.nlm.nih.gov/33200192","citation_count":4,"is_preprint":false},{"pmid":"35804263","id":"PMC_35804263","title":"CircRTN1 acts as a miR-431-5p sponge to promote thyroid cancer progression by upregulating TGFA.","date":"2022","source":"Hormones (Athens, Greece)","url":"https://pubmed.ncbi.nlm.nih.gov/35804263","citation_count":4,"is_preprint":false},{"pmid":"32020849","id":"PMC_32020849","title":"Cisplatin inhibits the proliferation of Saos-2 osteosarcoma cells via the miR-376c/TGFA pathway.","date":"2021","source":"Bosnian journal of basic medical sciences","url":"https://pubmed.ncbi.nlm.nih.gov/32020849","citation_count":4,"is_preprint":false},{"pmid":"36715959","id":"PMC_36715959","title":"Circ_0006667 contributes to high glucose-induced retinal pigment epithelial cell dysfunction by mediating miR-7-5p/TGFA axis in diabetic retinopathy.","date":"2023","source":"International ophthalmology","url":"https://pubmed.ncbi.nlm.nih.gov/36715959","citation_count":4,"is_preprint":false},{"pmid":"8272608","id":"PMC_8272608","title":"[Cleft lip and palate in the Chilean population: association with BamH1 polymorphism of the transforming growth factor alpha (TGFA) gene].","date":"1993","source":"Revista medica de Chile","url":"https://pubmed.ncbi.nlm.nih.gov/8272608","citation_count":4,"is_preprint":false},{"pmid":"30916164","id":"PMC_30916164","title":"Triiodothyronine (T3) upregulates the expression of proto-oncogene TGFA independent of MAPK/ERK pathway activation in the human breast adenocarcinoma cell line, MCF7.","date":"2019","source":"Archives of endocrinology and metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/30916164","citation_count":3,"is_preprint":false},{"pmid":"41267963","id":"PMC_41267963","title":"Integrative multi-omics analysis identifies TGFA as a novel glioma susceptibility gene and therapeutic target.","date":"2025","source":"Frontiers in neurology","url":"https://pubmed.ncbi.nlm.nih.gov/41267963","citation_count":1,"is_preprint":false},{"pmid":"32862534","id":"PMC_32862534","title":"Genetic variation of IRF6 and TGFA genes in an HIV-exposed newborn with non-syndromic cleft lip palate.","date":"2020","source":"Oral 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accelerates progression of mPanIN lesions to metastatic pancreatic cancer and drives development of cystic papillary lesions (IPMN), placing EGFR/TGFα signaling upstream of IPMN development in cooperation with Kras\",\n      \"method\": \"Genetic epistasis — transgenic mouse cross (Elastase-Tgfa × p48(+/Cre);Kras(+/LSL-G12D)) with histopathological and microarray analysis\",\n      \"journal\": \"Cancer cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — clean genetic epistasis in vivo with defined histopathological and transcriptomic phenotype, replicated across lesion types\",\n      \"pmids\": [\"17785207\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"TGFα stimulation of NPC cells (via EGFR) triggers tyrosine phosphorylation of downstream substrates including ANXA3, KRT8, and KRT18, identifying these as novel components of the EGFR phosphotyrosine signaling network activated by TGFα\",\n      \"method\": \"Functional proteomics: 2-DE, 2-D western blotting, mass spectrometry, and IP-western blotting of TGFα-treated CNE2 cells\",\n      \"journal\": \"Medical oncology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — mass spectrometry identification validated by IP-western, single lab\",\n      \"pmids\": [\"20049563\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"TGFA is secreted by papillary thyroid carcinoma (PTC) cells and activates EGFR on target cells, stimulating cell proliferation through PI3K/AKT activation independently of MEK/ERK signaling in BRAF-mutant PTC cells\",\n      \"method\": \"Conditioned medium transfer to HeLa cells, biochemical EGFR activation assays (ERK and AKT phosphorylation), cell proliferation assay with TGFA stimulation in NIM-1 PTC cells\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal in vitro methods (conditioned media, receptor activation, pathway inhibition), single lab\",\n      \"pmids\": [\"20877637\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"Triiodothyronine (T3) induces TGFA mRNA expression in MCF7 breast cancer cells through activation of PI3K; this induction is blocked by the PI3K inhibitor LY294002 and requires active gene transcription\",\n      \"method\": \"RT-PCR with pharmacological inhibitors (actinomycin D, cycloheximide, LY294002) in T3-treated MCF7 cells\",\n      \"journal\": \"Life sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — multiple inhibitor conditions tested, single lab\",\n      \"pmids\": [\"27094789\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"T3-induced upregulation of TGFA mRNA in MCF7 cells is independent of the MAPK/ERK pathway (PD98059 inhibition does not block it) but requires RNA Polymerase II activity (α-amanitin inhibition modulates the effect)\",\n      \"method\": \"RT-PCR with pharmacological inhibitors (α-amanitin, PD98059) in T3-treated MCF7 cells\",\n      \"journal\": \"Archives of endocrinology and metabolism\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — pathway dissection with orthogonal inhibitors, replicates and extends prior finding, single lab\",\n      \"pmids\": [\"30916164\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"MALAT1 lncRNA promotes osteosarcoma cell growth by acting as a competing endogenous RNA (ceRNA) for MIR376A, thereby de-repressing TGFA expression; direct binding between MIR376A and both MALAT1 3'-UTR and TGFA 3'-UTR was demonstrated\",\n      \"method\": \"RNA pulldown, dual-luciferase reporter assay, qRT-PCR, western blot, knockdown/overexpression in OS cell lines\",\n      \"journal\": \"Oncotarget\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct binding validated by luciferase assay and pulldown, single lab\",\n      \"pmids\": [\"27458156\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"miR-376c directly targets the 3'-UTR of TGFA and suppresses TGFA expression; IL-1β-driven NF-κB signaling downregulates miR-376c, leading to increased TGFA protein and osteosarcoma cell growth\",\n      \"method\": \"Luciferase reporter assay, western blot, miR-376c mimic/inhibitor transfection, NF-κB inhibition in osteosarcoma cells\",\n      \"journal\": \"Die Pharmazie\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct 3'-UTR targeting confirmed by luciferase, pathway placed by NF-κB inhibitor, single lab\",\n      \"pmids\": [\"29441940\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"miR-137 directly targets TGFA mRNA and suppresses its expression, mediating the tumor-suppressive effect of miR-137 on NSCLC cell proliferation\",\n      \"method\": \"Dual-luciferase reporter assay confirming miR-137 binding to TGFA 3'-UTR; western blot for TGFA protein; MTT and flow cytometry upon miR-137 overexpression/silencing and TGFA knockdown\",\n      \"journal\": \"European review for medical and pharmacological sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct target validated by luciferase and western blot, single lab\",\n      \"pmids\": [\"28239819\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"circTAF4B sponges miR-1298-5p to upregulate TGFA expression, promoting bladder cancer cell proliferation, migration, invasion, and EMT; direct binding between miR-1298-5p and circTAF4B and between miR-1298-5p and TGFA 3'-UTR was validated\",\n      \"method\": \"RNA pull-down, dual-luciferase reporter assay, nuclear/cytoplasmic fractionation, CCK-8, colony formation, wound healing, Transwell, western blot, and mouse xenograft\",\n      \"journal\": \"Frontiers in oncology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal methods including in vivo xenograft, single lab\",\n      \"pmids\": [\"34322376\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"miR-374b directly targets and negatively regulates TGFA in breast cancer cells; TGFA knockdown suppresses cell proliferation, 3D growth, invasion, and colony formation, and overexpression of TGFA rescues the phenotype caused by miR-374b overexpression\",\n      \"method\": \"Bioinformatics prediction, luciferase reporter assay, gain/loss-of-function experiments in vitro and in vivo (mouse tumor growth), rescue experiments with TGFA overexpression\",\n      \"journal\": \"Carcinogenesis\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — target validated by luciferase and rescue experiments in vivo and in vitro, single lab\",\n      \"pmids\": [\"33480984\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"LINC00857 functions as a ceRNA to sponge miR-340-5p, thereby upregulating TGFA and promoting PAAD cell proliferation, invasion, and migration; direct interactions between LINC00857/miR-340-5p and miR-340-5p/TGFA were validated\",\n      \"method\": \"Dual-luciferase reporter assay, CCK-8, colony formation, Transwell assay, TCGA database analysis\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — direct binding confirmed by luciferase, functional rescue experiments, single lab\",\n      \"pmids\": [\"33661995\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Cisplatin inhibits osteosarcoma (Saos-2) cell proliferation by upregulating miR-376c, which directly targets the TGFA 3'-UTR and suppresses TGFA expression; TGFA overexpression reverses cisplatin-induced growth inhibition\",\n      \"method\": \"Luciferase reporter assay, qRT-PCR, western blot, MTT, BrdU assay, TGFA shRNA and ORF clone transfection, miR-376c mimic/sponge transfection\",\n      \"journal\": \"Bosnian journal of basic medical sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct 3'-UTR targeting confirmed by luciferase, functional rescue experiments, single lab\",\n      \"pmids\": [\"32020849\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"circRTN1 sponges miR-431-5p to upregulate TGFA expression, promoting thyroid cancer cell proliferation, migration, and invasion; direct binding between miR-431-5p and circRTN1, and between miR-431-5p and TGFA 3'-UTR were validated\",\n      \"method\": \"Dual-luciferase reporter assay, RIP assay, qRT-PCR, western blot, colony formation, EdU, Transwell, flow cytometry, and xenograft tumor assay\",\n      \"journal\": \"Hormones\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct binding validated by luciferase and RIP, in vivo xenograft confirmation, single lab\",\n      \"pmids\": [\"35804263\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"LASTR lncRNA promotes lung cancer cell proliferation and metastasis through the miR-137/TGFA axis, activating the PI3K/AKT signaling pathway downstream of TGFA\",\n      \"method\": \"Knockdown of LASTR, qRT-PCR, cell proliferation/metastasis assays, western blotting for PI3K/AKT pathway components, GSEA, bioinformatic analysis\",\n      \"journal\": \"Journal of Cancer\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 — pathway placement based on western blot of downstream effectors and GSEA, mechanistic link to TGFA inferred from miR-137 axis, single lab\",\n      \"pmids\": [\"35281858\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"circ_0006667 sponges miR-7-5p to upregulate TGFA expression in retinal pigment epithelial cells; this axis promotes high-glucose-induced cell dysfunction (suppressed proliferation, increased apoptosis) in a diabetic retinopathy model\",\n      \"method\": \"Dual-luciferase reporter assay, RIP assay, RT-qPCR, western blot, MTT, EdU, flow cytometry in ARPE-19 cells\",\n      \"journal\": \"International ophthalmology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct binding validated by both luciferase and RIP assays, single lab\",\n      \"pmids\": [\"36715959\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"IRF6 and TGFA interact genetically in orofacial cleft susceptibility; Tgfa expression in murine palatal tissue requires Irf6 (Tgfa was not expressed in Irf6 knockout mice during palatogenesis), placing Irf6 upstream of Tgfa in the palatogenesis pathway\",\n      \"method\": \"Genetic interaction analysis in four human cohorts plus Irf6 knockout mouse model with expression analysis of Tgfa in palatal tissue\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — mouse knockout with direct expression analysis of Tgfa, replicated across multiple human cohorts\",\n      \"pmids\": [\"23029012\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"Human TGFA is composed of six exons; several sequence variants in conserved coding and regulatory segments were identified as rare candidate causes for orofacial clefting, supporting TGFA's role in facial morphogenesis; high-level TGFA expression occurs in medial edge palatal shelf epithelium at the time of shelf fusion in mice\",\n      \"method\": \"Genomic sequencing of TGFA (all exons, splice junctions, conserved 3'-UTR) in 250 individuals with NS-CL/P or NS-CPO; conformational analysis (SSCP)\",\n      \"journal\": \"Genomics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct mutation screening with biological context from mouse expression data, moderate sample size\",\n      \"pmids\": [\"10552925\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"In the extrahepatic bile duct (mouse), Tgfa is expressed by cholangiocytes at homeostasis and is upregulated after bile duct obstruction; increased Tgfa (along with other EGFR ligands) is associated with injury-induced biliary hyperproliferation that is EGFR-dependent\",\n      \"method\": \"Mouse bile duct ligation model, transcriptomic analysis, immunohistochemistry, biliary organoid studies with EGFR ligand stimulation and inhibition\",\n      \"journal\": \"bioRxiv\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 — localization and upregulation data from mouse model and organoids, Tgfa role inferred from EGFR dependence of proliferation, preprint\",\n      \"pmids\": [],\n      \"is_preprint\": true\n    }\n  ],\n  \"current_model\": \"TGFA encodes a transmembrane precursor that is proteolytically processed to release a soluble EGF-like ligand that activates EGFR, thereby driving downstream PI3K/AKT signaling (independently of MEK/ERK in certain cancer contexts); its expression is regulated transcriptionally by PI3K (downstream of T3/thyroid hormone) and post-transcriptionally by multiple miRNAs (miR-137, miR-376c, miR-374b, miR-340-5p, miR-1298-5p, miR-431-5p, miR-7-5p) whose activity is in turn modulated by competing lncRNAs and circRNAs; in vivo, TGFA cooperates with oncogenic KRAS to promote pancreatic carcinogenesis through EGFR signaling, and its expression in palatal epithelium during fusion is regulated upstream by IRF6.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"TGFA encodes transforming growth factor-alpha, a secreted EGF-family ligand that activates EGFR to drive cell proliferation and survival through PI3K/AKT signaling, functioning as a key mitogenic factor in epithelial tissues during development and in cancer. In pancreatic tumorigenesis, TGFA cooperates with oncogenic KRAS to accelerate progression from preneoplastic lesions to metastatic cancer and intraductal papillary mucinous neoplasm [PMID:17785207], while in BRAF-mutant thyroid cancer cells TGFA-EGFR signaling promotes proliferation through PI3K/AKT independently of MEK/ERK [PMID:20877637]. TGFA expression is regulated transcriptionally by IRF6 during palatogenesis and by T3-activated PI3K in breast cancer cells [PMID:23029012, PMID:27094789], and post-transcriptionally by multiple miRNAs (miR-137, miR-376c, miR-374b, miR-340-5p, miR-1298-5p, miR-431-5p, miR-7-5p) whose suppressive effects are antagonized by competing endogenous lncRNAs and circRNAs [PMID:27458156, PMID:29441940, PMID:28239819, PMID:33480984]. Variants in TGFA coding and regulatory regions have been identified in individuals with nonsyndromic orofacial clefting, and Tgfa expression in medial edge palatal epithelium at the time of shelf fusion supports a role in craniofacial morphogenesis [PMID:10552925, PMID:23029012].\",\n  \"teleology\": [\n    {\n      \"year\": 1999,\n      \"claim\": \"Establishing that TGFA is expressed in the critical palatal epithelium at the time of shelf fusion and harbors rare coding/regulatory variants in cleft patients answered whether TGFA has a direct developmental role in craniofacial morphogenesis.\",\n      \"evidence\": \"Genomic sequencing of all TGFA exons/regulatory regions in 250 cleft individuals plus mouse palatal expression mapping\",\n      \"pmids\": [\"10552925\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Functional validation of individual variants not performed\", \"Causal mechanism linking TGFA variants to cleft pathogenesis not demonstrated\", \"Role of TGFA relative to other EGFR ligands in palatogenesis unclear\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Demonstrating that pancreatic co-expression of Tgfa and oncogenic Kras synergistically accelerates progression to metastatic cancer and IPMN established TGFA-EGFR signaling as a cooperating oncogenic pathway with KRAS in pancreatic tumorigenesis.\",\n      \"evidence\": \"Genetic cross of Elastase-Tgfa and p48-Cre;KrasG12D transgenic mice with histopathological and transcriptomic analysis\",\n      \"pmids\": [\"17785207\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether TGFA is the critical endogenous EGFR ligand versus other ligands not resolved\", \"Downstream effector pathways mediating synergy not dissected\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Showing that secreted TGFA activates EGFR to drive PI3K/AKT-dependent proliferation independently of MEK/ERK in BRAF-mutant PTC cells, and identifying novel phosphotyrosine substrates (ANXA3, KRT8, KRT18) in TGFA-treated cells, clarified the signaling branch selectivity and substrate repertoire downstream of TGFA-EGFR.\",\n      \"evidence\": \"Conditioned-medium transfer with pathway inhibitors in thyroid cancer cells; 2-DE/MS phosphoproteomics in TGFA-treated NPC cells\",\n      \"pmids\": [\"20877637\", \"20049563\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"In vivo relevance of PI3K/AKT-selective signaling not tested\", \"ANXA3/KRT phosphorylation functional consequences unknown\", \"Generalizability beyond BRAF-mutant context unclear\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Placing IRF6 upstream of TGFA in palatogenesis — Tgfa expression is absent in Irf6-knockout palatal tissue — resolved how TGFA expression is regulated during craniofacial development and explained the genetic interaction between IRF6 and TGFA in orofacial cleft susceptibility.\",\n      \"evidence\": \"Irf6 knockout mouse palatal tissue expression analysis combined with genetic interaction testing in four human cohorts\",\n      \"pmids\": [\"23029012\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether IRF6 directly binds the TGFA promoter or acts indirectly not determined\", \"Other IRF6 targets that may contribute to clefting not excluded\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Discovering that T3 induces TGFA transcription through PI3K (blocked by LY294002) independently of MAPK/ERK and that lncRNA MALAT1 sponges miR-376c to de-repress TGFA established that TGFA expression is controlled at both the transcriptional and post-transcriptional levels by distinct regulatory axes.\",\n      \"evidence\": \"RT-PCR with PI3K/MAPK inhibitors in T3-treated MCF7 cells; RNA pulldown and luciferase assays for MALAT1-miR376A-TGFA axis in osteosarcoma cells\",\n      \"pmids\": [\"27094789\", \"27458156\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Identity of the transcription factor linking PI3K to TGFA promoter unknown\", \"Whether MALAT1-miR-376c axis operates outside osteosarcoma not tested\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Validation that miR-137 and miR-376c directly target the TGFA 3′-UTR, with miR-376c itself regulated by NF-κB/IL-1β signaling, expanded the inventory of TGFA-targeting miRNAs and linked inflammatory signaling to post-transcriptional TGFA de-repression.\",\n      \"evidence\": \"Luciferase reporter assays confirming direct miRNA binding to TGFA 3′-UTR in NSCLC and osteosarcoma cells; NF-κB inhibitor experiments\",\n      \"pmids\": [\"28239819\", \"29441940\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"In vivo validation of miR-137 and miR-376c regulation of TGFA lacking\", \"Relative contribution of each miRNA to TGFA regulation in any single tissue unknown\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Multiple studies converged to show that TGFA is a common effector of diverse ceRNA networks — circTAF4B/miR-1298-5p in bladder cancer, miR-374b in breast cancer, LINC00857/miR-340-5p in PAAD, and cisplatin-induced miR-376c in osteosarcoma — establishing that TGFA upregulation is a recurrent oncogenic output of miRNA sponging across cancer types.\",\n      \"evidence\": \"Luciferase reporter, RIP, and rescue experiments across bladder cancer, breast cancer, PAAD, and osteosarcoma cell lines with xenograft confirmation\",\n      \"pmids\": [\"34322376\", \"33480984\", \"33661995\", \"32020849\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No systematic comparison of which ceRNA axis dominates in a given tissue\", \"Whether targeting TGFA directly is therapeutically superior to targeting individual ceRNAs unknown\", \"Endogenous stoichiometry of ceRNA competition not measured\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Further ceRNA axes (circRTN1/miR-431-5p in thyroid cancer, LASTR/miR-137 in lung cancer) converging on TGFA with downstream PI3K/AKT activation reinforced TGFA as a nodal oncogenic target regulated by competing noncoding RNAs.\",\n      \"evidence\": \"Luciferase, RIP, xenograft assays in thyroid cancer cells; western blot for PI3K/AKT in lung cancer cells\",\n      \"pmids\": [\"35804263\", \"35281858\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"LASTR/miR-137/TGFA axis is low confidence with pathway placement based only on western blot\", \"Direct demonstration that TGFA mediates PI3K/AKT activation in the LASTR axis lacking\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Identification of circ_0006667/miR-7-5p/TGFA axis in retinal pigment epithelium under high-glucose conditions extended TGFA's ceRNA-regulated biology beyond cancer into diabetic retinopathy.\",\n      \"evidence\": \"Luciferase and RIP assays in ARPE-19 cells under high-glucose conditions\",\n      \"pmids\": [\"36715959\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"In vivo diabetic retinopathy model not used\", \"Functional contribution of TGFA relative to other high-glucose effectors not quantified\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"The precise proteolytic processing mechanism of the TGFA transmembrane precursor, the identity of the metalloprotease(s) principally responsible in each tissue context, and whether TGFA signals in a juxtacrine versus paracrine mode in specific developmental and disease settings remain unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No structural model of TGFA-EGFR complex from these studies\", \"Relative contributions of TGFA versus other EGFR ligands in any single in vivo context not delineated\", \"Therapeutic targeting of TGFA specifically (versus EGFR) not explored\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0048018\", \"supporting_discovery_ids\": [0, 2, 8, 9, 12]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005576\", \"supporting_discovery_ids\": [2, 16]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [0, 1, 2, 13]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [15, 16]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [0, 2, 8, 9, 10, 12]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\n      \"EGFR\",\n      \"IRF6\",\n      \"KRAS\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}