the effects of tpa on cultured fibroblasts -- including enhanced hexose uptake , disruption of actin stress fibres and growth stimulation -- are very similar to those induced by certain retrovirus transforming proteins and by peptide growth factors such as epidermal growth factor ( egf ) , platelet-derived growth factor ( pdgf ) and multiplication-stimulating activity ( msa ) .
C0018284
growth factors
C0032200
platelet-derived growth factor