in cell culture , insulin interacts synergistically with other hormones and growth factors such as platelet-derived growth factor ( pdgf ) , fibroblast growth factor ( fgf ) , epidermal growth factor ( egf ) , tumor-promoting phorbol esters , and thrombin , to stimulate progression through the cell cycle of cells that have been arrested in g1 by deprivation for serum .
C0018284
growth factors
C0032200
growth