Ballard F J, Nield M K, Francis G L, Knowles S E
Acta Biol Med Ger. 1981;40(10-11):1293-300.
Protein breakdown in many cell lines is inhibited by growth factors. The response is specific, rapid and additive only at suboptimal concentrations. Transformed cells are typically more sensitive to growth factors than nontransformed cells while the effectiveness of growth factors in human fibroblasts is diminished with senescence. Bovine colostrum has been shown to be an extremely rich source of growth factors as compared to serum.
许多细胞系中的蛋白质分解受到生长因子的抑制。这种反应具有特异性、快速性，且仅在次优浓度下具有累加性。与未转化细胞相比，转化细胞通常对生长因子更为敏感，而生长因子在人成纤维细胞中的有效性会随着衰老而降低。与血清相比，牛初乳已被证明是生长因子的极其丰富的来源。
