Growth factors can act on many kinds of cells as mitotic promoter and deprival of growth factors can cause cease of cell growth or cell death . thus growth factors are usually thought relative to cell growth and differentiation 生长因子可以作为促分裂剂作用于多种细胞,剥夺生长因子可以导致细胞生长停止或细胞死亡,因此通常认为生长因子与促进细胞的增殖和存活有关。