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Description

Platelet-Derived Growth Factor (PDGF) is a dimer of A (17 kDa) and B (14 kDa) chains (AA, AB, or BB). Its receptors are transmembrane receptor tyrosine kinases, PDGF Receptors type A and B. The type A PDGF receptor binds all three PDGFs with high affinity, whereas the type B PDGF receptor is selective for PDGF-BB. PDGF signals as a growth and survival factor, as it is a potent activator of the PI3 Kinase pathway. PDGF signaling appears to play an essential role in the development of tumors of glial origin.