Transforming growth factor beta-1 receptor (TGFβR1)

The transforming growth factor beta-1 receptor (TGFβR1) is a transmembrane serine/threonine kinase receptor that mediates cellular signaling of TGF-β1, a major growth factor involved in regulating cell proliferation, differentiation, apoptosis, ECM production, and immune function. TGFβR1 forms a heteromeric complex with TGFβR2 at the cell surface, where ligand binding triggers phosphorylation-dependent activation of SMAD2/3 transcription factors, promoting or repressing target gene expression[7][1][8]. The receptor plays a dual role in cancer as both a tumor suppressor and promoter depending on cellular context and disease stage. It is a significant therapeutic target for diseases characterized by dysregulated TGF-β signaling, most notably fibrotic diseases and cancer. Both genetic and pharmacologic modulation of TGFβR1 are areas of active research, but therapies must be carefully managed due to the receptor’s key role in homeostasis and development. Mutations in TGFBR1 are associated with disorders such as Loeys-Dietz syndrome, reflecting its importance in connective tissue biology[7][8][1].

Other names

TGFβR1TGFBR1Activin receptor-like kinase 5 (ALK5)TβRI

Kinase inhibition: Drugs bind the intracellular kinase domain, inhibiting receptor phosphorylation, thus blocking downstream SMAD signaling. Ligand antagonism: Targeting the TGF-β ligand prevents receptor activation. Disruption of receptor-ligand binding: Some biologics prevent ligand and receptor interaction.