studies of in vitro cell proliferation and anchorage-independent growth show that syngeneic host macrophages from the peritoneal cavity or from the growing tumour release a diffusible factor ( s ) which has ( 1 ) growth-stimulating activity on fs6 cells in monolayer cultures in pdgf-poor medium and ( 2 ) potent colony-stimulating activity on fs6 cell cultured in methyl-cellulose-containing medium .
C0596290
cell proliferation
C0007634
cell