Growth‐promoting activity of tissue inhibitor of metalloproteinases‐1 (TIMP‐1) for a wide range of cells A possible new growth factor in serum

Human tissue inhibitor of metalloproteinases-1 (TIMP-1), but not TIMP-2, has potent growth-promoting activity for a wide range of human and bovine cells. TIMP-1 seems to be a new cell-growth factor in serum and to stimulate the cells independently of its inhibitory activity.