正性生长因子可以改善恶性肿瘤病人的机体代谢状态 ,提高对化疗及手术的耐受性 ,但也存在着安全性的问题。该类因子在促进肿瘤细胞生长方面可使细胞周期中DNA合成期 (S期 )细胞数增加 ,使某些癌基因 (如c myc等 )表达扩增。将该类因子与化疗同时使用 ,从理论上推测能增加化疗的敏感性 ,至少为肿瘤的综合治疗提供新的思路 Positive growth factor can improve the metabolic status of patients with malignant tumors and improve the tolerance of chemotherapy and surgery, but there are also safety issues. Such factors in the promotion of tumor cell growth can make the cell cycle in the DNA synthesis phase (S phase) cells increased, so that some of the oncogenes (such as c myc) expression amplification. The use of such factors with chemotherapy at the same time, theoretically speculated to increase the sensitivity of chemotherapy, at least for the treatment of cancer provides a new way of thinking