摘要
目的 :探讨右旋甲硫氨酸 (D Met)对胃癌细胞的作用及其可能的机制。 方法 :用两种培养液培养 6株胃癌细胞 ,含D Met的培养液为实验组 ,含L Met的培养液为对照组。用MTT法检测细胞的增殖活性 ,用流式细胞仪检测细胞凋亡率和细胞周期。 结果 :实验组各株胃癌细胞的吸光度 (A值 )均显著低于对照组 (P <0 .0 5 ) ,而且其差异随时间延长而加大。实验组SUN 16、NCI N87和SGC 790 1细胞的凋亡率显著高于对照组 (P <0 .0 1) ,其余细胞株的实验组凋亡率与对照组差异无显著性意义 (P >0 .0 5 )。KATO Ⅲ细胞的G0 /G1期比例显著增高 (P <0 .0 5 ) ,NCI N87、AGS、MKN4 5、SGC 790 1细胞的S期比例显著增高 (P <0 .0 1)。 结论 :这 6株胃癌细胞都具有Met依赖性。用D Met替代L Met培养胃癌细胞 ,胃癌细胞增殖活性受到抑制 ,这可能是通过诱导胃癌细胞凋亡或 (和 )周期阻滞实现的。
Objectives: To study the effect of D-methionine on gastric cancer and its mechanism. Methods: We used a medium with D-methionine to culture six gastric cancer cell lines. The medium with L-methionine acted as control to culture cells. The proliferation of cells was detected by MTT. Apoptotic rates and cell cycle were detected by FMC. Results: Absorbance of all cell lines was significantly lower than control (P<0.05), and this difference was more obvious with the development of time. The apoptotic rates of SUN-16, NCI-N87 and SGC-7901 were higher than those in control group (P<0.01), and the rates of other cell lines were not significantly different (P>0.05). KATO-Ⅲ cells stayed more in G 0 /G 1 phase (P<0.05).NCI-N87、AGS、MKN45 and SGC-7901 cells stayed more in S phase (P< 0.01 ). Conclusions: The gastric cancer cell lines are methionine dependent. D-methionine can inhibite the proliferation of gastric cancer cells through inducing cells apoptosis and/or arresting cell cycle.
出处
《肠外与肠内营养》
CAS
2005年第1期20-23,28,共5页
Parenteral & Enteral Nutrition
