OnCo

SMAD3 (SMAD family member 3) is a gene whose normal job is to hold cell growth in check. The public catalogues list it as a tumour suppressor and a biomarker, and clinical evidence ties its variants to diagnosis, prognosis or drug response. Tied to Colorectal cancer, Pancreatic ductal adenocarcinoma, Skin cancer and 4 more. This dossier gathers the 0 products (0 approved), 0 trials, 0 pathways and 0 resistance routes in the corpus that involve it, with external identifiers so it can be joined to UniProt, ChEMBL, Open Targets and the rest of biology.

Biology

Receptor-regulated SMAD (R-SMAD) that is an intracellular signal transducer and transcriptional modulator activated by TGF-beta (transforming growth factor) and activin type 1 receptor kinases. Binds the TRE element in the promoter region of many genes that are regulated by TGF-beta and, on formation of the SMAD3/SMAD4 complex, activates transcription. Also can form a SMAD3/SMAD4/JUN/FOS complex at the AP-1/SMAD site to regulate TGF-beta-mediated transcription. Has an inhibitory effect on wound healing probably by modulating both growth and migration of primary keratinocytes and by altering the TGF-mediated chemotaxis of monocytes. This effect on wound healing appears to be hormone-sensitive. Regulator of chondrogenesis and osteogenesis and inhibits early healing of bone fractures. Location: Cytoplasm; Nucleus (UniProt). Locus 15q22.33 (HGNC).

Where it is found
  • Colorectal cancer: Open Targets association 0.68 with colorectal cancer (MONDO_0005575); IntOGen driver in 3 cohorts (COADREAD)
  • Pancreatic ductal adenocarcinoma: IntOGen driver in 1 cohort (PAAD)
  • Skin cancer: Open Targets association 0.55 with skin cancer (MONDO_0002898)
  • Breast cancer: Open Targets association 0.54 with breast cancer (MONDO_0007254)
  • Thyroid cancer: Open Targets association 0.53 with thyroid cancer (MONDO_0002108)
  • Lung cancer: Open Targets association 0.51 with lung cancer (MONDO_0008903)
Class: tumor suppressor · Gene: SMAD3 · Facts checked 2026-09-23 · Target page

External identifiers

Built from HGNC, Ensembl, UniProt and ChEMBL ids

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Companion diagnostics

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Query for this target: (TITLE:"SMAD3" OR ABSTRACT:"SMAD3" OR TITLE:"SMAD family member 3" OR ABSTRACT:"SMAD family member 3" OR TITLE:"JV15-2" OR ABSTRACT:"JV15-2" OR TITLE:"HsT17436" OR ABSTRACT:"HsT17436" OR TITLE:"MADH3" OR ABSTRACT:"MADH3") AND (cancer OR tumor OR tumour OR oncology OR carcinoma OR lymphoma OR leukemia OR leukaemia OR myeloma OR sarcoma OR melanoma OR glioma). Results are unfiltered search hits about SMAD3, not a curated reading list.

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The dossier as machine-readable JSON: identifiers from HGNC, Ensembl, UniProt and ChEMBL, products with status, trials, pathways, hotspots, open questions and assays. The full entity record is in the open API at /api/v1/entities/smad3.json. Licence CC BY-NC 4.0.