transforming growth factor-β1

Transforming growth factor-β1 (TGF-β1) is a multifunctional cytokine and the most studied member of the transforming growth factor beta family. It regulates numerous cellular processes including cell proliferation, differentiation, motility, apoptosis (programmed cell death), immune response modulation, wound healing, bone and cartilage formation and maintenance, angiogenesis (formation of blood vessels), and extracellular matrix production[2][3][4][5]. Mechanistically, TGF-β1 binds to type I and type II serine/threonine kinase receptors on the cell surface (TβRI/TβRII), leading to phosphorylation of Smad2/3 proteins. These then form complexes with Smad4 that translocate into the nucleus to regulate gene transcription. In addition to this canonical pathway (Smad-dependent), TGF-β1 also activates non-canonical pathways such as MAP kinases and PI3K-Akt[2]. Due to its potent immunosuppressive effects and role in tissue remodeling/fibrosis as well as tumor progression or suppression depending on context[2][3], it has been investigated for therapeutic applications in autoimmune diseases (e.g., multiple sclerosis models), wound healing disorders, fibrosis-related conditions, transplant rejection prevention[1], and cancer therapy—both as a target for inhibition in oncology or as an agent for immune modulation.

Other names

transforming growth factor beta-1 proprotein