Platelet-Derived Growth Factor (PDGF) is a protein that plays a crucial role in cell growth, development, and healing. It is primarily produced by platelets, which are small cell fragments in the blood that help with clotting. PDGF stimulates the proliferation and migration of various cell types, particularly fibroblasts, which are essential for tissue repair and regeneration. PDGF functions by binding to specific receptors on the surface of target cells, triggering a series of cellular responses. This process is vital in wound healing and tissue repair, as it promotes the formation of new blood vessels and the production of extracellular matrix components, aiding in the restoration of damaged tissues.