using cultured fibroblasts , which are also rich in f-actin bundles , we demonstrate the platelet and monocyte isoforms of platelet-derived growth factor ( pdgf ; ab and bb ) but not pdgf-aa , can stimulate fibroblasts to contract collagen matrix in a time course similar to that of wound contraction .
C0032200
pdgf
C0210108
pdgf-aa