首都医科大学学报 ›› 2009, Vol. 30 ›› Issue (6): 812-816.doi: 10.3969/j.issn.1006-7795.2009.06.020

• 基础研究 • 上一篇    下一篇

Bcl-2、Bak及caspase-9、3在维生素E琥珀酸酯诱导人胃癌细胞凋亡中的作用

苑林宏1, 张晓华2, 张岭3, 吴坤4   

  1. 1. 首都医科大学公共卫生与家庭医学学院营养与食品卫生学系;2. 北京市丰台区疾病预防控制中心;3. 浙江省医学科学院药物所;4. 哈尔滨医科大学公共卫生学院营养与食品卫生学教研室
  • 收稿日期:2009-01-06 修回日期:1900-01-01 出版日期:2009-12-21 发布日期:2009-12-21
  • 通讯作者: 吴坤

Effects of Bcl-2, Bak, caspase-9, 3 in Vitamin E Succinate Induced Apoptosis of Human Gastric Carcinoma Cells

YUAN Lin-hong1, ZHANG Xiao-hua2, ZHANG Ling3, WU Kun4   

  1. 1. Department of Nutrition and Food Hygiene, School of Public Health and Family Medicine, Capital Medical University;2. Beijing Fengtai Center for Disease Control and Prevention;3. Institute of Materia Medica, Zhejiang Academy of Medical Science;4. Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University
  • Received:2009-01-06 Revised:1900-01-01 Online:2009-12-21 Published:2009-12-21

摘要: 目的 探讨维生素E琥珀酸酯(VES)对体外培养的人胃癌细胞株SGC-7901细胞的凋亡诱导作用及其可能机制。方法 以体外培养的人胃癌SGC-7901细胞为肿瘤模型,给予不同浓度水平的VES处理不同时间后,采用四甲偶氮唑盐比色(MTT)法观察VES对人胃癌细胞的生长抑制作用;用Annexin-V-FITC 方法检测VES对胃癌细胞的凋亡诱导作用;采用Western blotting方法检测VES处理后的胃癌细胞中Bcl-2和Bak蛋白表达及caspase-9、 caspase-3 酶原的表达。结果 (12.5~50.0)μmol/L的VES作用于人胃癌细胞24 h后就可以抑制胃癌细胞的生长,呈明显的剂量依赖关系;Annexin-V-FITC和PI双染流式细胞仪检测结果表明,50 μmol/L VES处理SGC-7901细胞12 h后即可以引起细胞凋亡,且随作用时间的延长凋亡越明显。Western blotting结果显示,VES可以调节胃癌细胞中与凋亡相关的Bcl-2和Bak蛋白的表达,同时促进caspase-9、caspase-3酶原的裂解与活化。结论 调节Bcl-2和Bak蛋白的表达,并裂解caspase-9、 caspase-3 是VES在体外发挥对人胃癌细胞的生长抑制和凋亡诱导作用的可能机制之一。

关键词: 维生素E琥珀酸酯, 凋亡, 人胃癌细胞

Abstract: Objective To study the growth inhibition and apoptosis-inducing effects of vitamin E succinate(VES) in human gastric carcinoma cells in vitro. Methods Cultured human gastric carcinoma cells were used as tumor model. MTT method was applied to detect the growth inhibition effect of VES in human gastric cancer cells. Apoptosis induced by VES treatment was detected by using Annexin-V-FITC assay. Protein expressions of Bcl-2, Bak, caspase-9 and caspase-3 were explored by Western blotting method. Results Treatment with 12.5~50 μmol/L VES for 24 h inhibited human gastric carcinoma SGC-7901 cells growth in a dose-dependent manner. The results of Annexin-V-FITC indicated that 50 μmol/L VES treatment for 12 h induced apoptosis in gastric cancer cell in a time-dependent manner. Besides, the regulation effects of VES on the protein expression of Bcl-2 and Bak with the cleavage and activation of caspase-9 and caspase-3 were proved by Western blotting assay. Conclusion VES inhibited human gastric carcinoma SGC-7901 cells growth and induced apoptosis with the regulation of Bcl-2, Bak protein expression and cleavage of caspase-9 and caspase-3.

Key words: vitamin E succinate, apoptosis, human gastric carcinoma cells

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