PDGF-C

PDGF-C is a later-discovered member of the platelet-derived growth factor family, encoded by PDGFC and secreted as a latent homodimer, PDGF-CC. Unlike PDGF-A and PDGF-B, each PDGF-C chain carries an N-terminal CUB domain that must be proteolytically removed, in vivo by tissue plasminogen activator and plasmin, before the mature dimer can activate PDGFR-alpha and PDGFR-alpha/beta. PDGF-C drives fibroblast proliferation and is upregulated in liver and kidney fibrosis; PDGFC-null mice show cleft palate, abnormal kidney vasculature, and defective cerebral vessels. Recombinant PDGF-C protein, supplied as latent or activated forms, is used to study protease-dependent growth-factor activation and fibrotic signaling.