›› 2012, Vol. 24 ›› Issue (2): 115-120.doi: 10.3969/j.issn.1004-616x.2012.02.008

• 论著 • 上一篇    下一篇

内质网应激在芹菜素诱导胃癌细胞凋亡中的作用

王晓琳/黄晓莉/赵 艳/张志宏/张旭光/吕 和/吴 坤*   

  1. 哈尔滨医科大学公共卫生学院营养与食品卫生学教研室,黑龙江 哈尔滨 150081
  • 收稿日期:2011-08-14 修回日期:2011-11-29 出版日期:2012-03-30 发布日期:2012-03-30

Roles of endoplasmic reticulum stress in apigenin-induced apoptosis in human gastric cancer SGC-7901 cells

WANG Xiao-lin,HUANG Xiao-li,ZHAO Yan,ZHANG Zhi-hong,ZHANG Xu-guang,LU He,WU Kun*   

  1. Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin 150081, Heilongjiang, China
  • Received:2011-08-14 Revised:2011-11-29 Online:2012-03-30 Published:2012-03-30
  • Contact: WU Kun

摘要: 目的: 探讨内质网应激在芹菜素诱导人胃癌SGC-7901细胞凋亡中的作用。方法:采用Western blot方法检测不同剂量 (0、20、40、60、80 μmol/L)芹菜素作用48 h和60 μmol/L芹菜素作用不同时间 (0、12、24、48 h)后对胃癌SGC-7901细胞中内质网应激标志物葡萄糖调节蛋白 (glucose regulative protein,GRP)GRP78、GRP94和内质网应激凋亡途径关键因子C/EBP同源蛋白 (C/EBP-homologous protein,CHOP)表达的影响;并用DAPI荧光染色和流式细胞仪检测10 mmol/L内质网应激抑制剂4-苯丁酸 (4-phenylbutyric acid,PBA)加入前后细胞凋亡情况的变化。结果:芹菜素可以诱导GRP78、GRP94蛋白的表达,并随着剂量和时间的增加蛋白表达量也呈增加趋势,但芹菜素不能诱导CHOP蛋白的表达;荧光染色和流式细胞术结果显示4-PBA与20 μmol/L 芹菜素联合作用组的细胞凋亡率明显增加,与20 μmol/L 芹菜素组及溶剂对照组间的差异具有统计学意义 (P<0.05或P<0.01)。结论:内质网应激在芹菜素诱导人胃癌SGC-7901细胞凋亡中可能对细胞起到保护作用。

关键词: 内质网应激, 芹菜素, 细胞凋亡

Abstract: OBJECTIVE: To investigate the roles of endoplasmic reticulum stress (ERS) in apigenin (API) -induced apoptosis in human gastric cancer SGC-7901 cells. METHODS:SGC-7901 cells were treated with API at 20,40 ,60 and 80 μmol/L and at 3 μg/ml tunicamycin (TM) for 48 h or at 60 μmol/L for up to 48 h. GRP78,GRP94 and C/EBP-homologous protein ( CHOP) were explored using Western blot. When the cells were treated with endoplasmic reticulum stress inhibitor 4-phenyl butyric acid (4-PBA ),apoptosis was assessed by DAPI staining and flow cytometry. RESULTS:The protein levels of GRP78 and GRP94 increased in API-treated cells in time and dose -dependent manner,but apigenin did not induce the expression of CHOP protein. Pretreatment with 4-PBA drastically increased API-induced apoptosis in SGC-7901 cells (P<0.01). CONCLUSION:ERS may exert protective effect on API-induced apoptosis in human gastric cancer SGC-7901 cells.

Key words: endoplasmic reticulum stress, apigenin, apoptosis