中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (51): 8286-8291.doi: 10.3969/j.issn.2095-4344.2014.51.016

• 组织构建细胞学实验 cytology experiments in tissue construction • 上一篇    下一篇

两种砷化物诱导胰岛细胞的凋亡

姚晓峰,王方芳,姜丽平,耿成燕,仲来福,郑白璐,杨 光,孙鲜策   

  1. 大连医科大学劳动卫生与环境卫生教研室,辽宁省防治老年退行性疾病天然产物工程实验室,辽宁省大连市 116044
  • 出版日期:2014-12-10 发布日期:2014-12-10
  • 通讯作者: 孙鲜策,博士,教授,大连医科大学劳动卫生与环境卫生教研室,辽宁省大连市 116044
  • 作者简介:姚晓峰,女,1979年生,辽宁省大连市人,汉族, 2006年大连医科大学毕业,硕士,讲师。
  • 基金资助:

    国家自然科学基金(30972562);辽宁省自然科学基金(2014023050)

Two arsenicals induce apoptosis of islet cells

Yao Xiao-feng, Wang Fang-fang, Jiang Li-ping, Geng Cheng-yan, Zhong Lai-fu, Zheng Bai-lu, Yang Guang, Sun Xian-ce   

  1. Liaoning Natural Products Engineering Research Center for Anti-Degenerative Diseases, Department of Occupational and Environmental Health, Dalian Medical University, Dalian 116044, Liaoning Province, China
  • Online:2014-12-10 Published:2014-12-10
  • Contact: Sun Xian-ce, M.D., Professor, Liaoning Natural Products Engineering Research Center for Anti-Degenerative Diseases, Department of Occupational and Environmental Health, Dalian Medical University, Dalian 116044, Liaoning Province, China
  • About author:Yao Xiao-feng, Master, Lecturer, Liaoning Natural Products Engineering Research Center for Anti-Degenerative Diseases, Department of Occupational and Environmental Health, Dalian Medical University, Dalian 116044, Liaoning Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 30972562; the Natural Science Foundation of Liaoning Province, No. 2014023050

摘要:

背景:近年有流行病学调查显示砷暴露与糖尿病发病相关。

 

目的:实验从砷导致胰岛β细胞凋亡的机制入手,阐明砷化物相关糖尿病的致病机制。

 

方法:将砷酸氢二钠(Na2HAsO4·7H2O,iAs5+,50,100,200 µmol/L)和二甲基胂酸钠(C2H6AsNaO2·3H2O,DMA5+,100,200,400 µmol/L)分别作用于大鼠胰岛细胞株(INS-1细胞)24 h或48 h。通过MTT法检测砷化物对胰岛细胞的毒性作用。用Annexin V-FITC/PI和Hoechst 33258染色法检测两种砷化物致细胞凋亡情况。用2’,7’-二氢二氯荧光素染色检测细胞内活性氧的含量,用Western blot检测细胞内P53的蛋白含量变化。

 

结果与结论:砷酸氢二钠(> 50 µmol/L)、二甲基胂酸钠(> 100 µmol/L)均降低大鼠胰岛β细胞的细胞存活率   (P < 0.05P < 0.01);砷酸氢二钠(50-200 µmol/L)和二甲基胂酸钠(100-400 µmol/L)作用于大鼠胰岛β细胞48 h后,细胞发生凋亡。砷酸氢二钠、二甲基胂酸钠暴露24 h引起大鼠胰岛β细胞内活性氧水平呈剂量依赖性升高(P < 0.05,P < 0.01)。经砷酸氢二钠染毒的胰岛β细胞的细胞核内P53蛋白表达增多(P < 0.05,P < 0.01),而经二甲基胂酸钠染毒的大鼠胰岛β细胞的细胞核内P53蛋白表达差异无显著性意义。结果说明,两种砷化物砷酸氢二钠、二甲基胂酸钠均可引起胰岛β细胞凋亡,可能与砷所致活性氧水平增高有关。

 


中国组织工程研究
杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


全文链接:

关键词: 组织构建, 组织工程, 砷化物, 大鼠胰岛β细胞, 细胞凋亡, 活性氧, P53, 国家自然科学基金

Abstract:

BACKGROUND: In recent years, epidemiological data show an association between arsenic exposure and diabetes mellitus.

OBJECTIVE: To investigate the underlying mechanism of arsenic-induced apoptosis in pancreatic β cells to elucidate the pathogenesis of arsenic-related diabetes.
METHODS: Rat pancreatic β cells (INS-1) were treated with sodium arsenate (iAs5+) (50, 100, 200 µmol/L) and dimethylarsinic acid (DMA5+) (100, 200, 400 µmol/L) for 24 or 48 hours. The cytotoxicity of arsenic was detected by MTT assay in INS-1 cells. The arsenic-induced apoptosis was detected by Annexin V-FITC/PI and Hoechst33258 staining. The intracellular reactive oxygen species level was detected by 2’,7’-dichlorofluorescein staining. The P53 expression level was detected by western blot.
RESULTS AND CONCLUSION: iAs5+ (> 50 µmol/L), DMA5+ (> 100 µmol/L) reduced the INS-1 cell viability     (P < 0.05, P < 0.01); after treating with iAs5+ (50-200 µmol/L) and DMA5+ (100-400 µmol/L) for 48 hours, both arsenic compounds induced apoptosis in INS-1 cells. The intracellular reactive oxygen species level increased in a concentration-dependent manner (P < 0.05, P < 0.01), after treating with iAs5+ and DMA5+ for 24 hours respectively; the nuclear expression level of P53 protein in INS-1 increased after treating with iAs5+(P < 0.05,P < 0.01); however, DMA5+ did not increase the P53 level significantly. In summary, both iAs5+ and DMA5+ can induce apoptosis in INS-1 cells, which may be related with arsenic-induced rise in intracellular reactive oxygen species.


中国组织工程研究
杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


全文链接:

Key words: tissue engineering, arsenic, apoptosis, flow cytometry

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