基础医学与临床 ›› 2015, Vol. 35 ›› Issue (6): 739-743.

• 研究论文 • 上一篇    下一篇

金属硫蛋白降低GRP78和CHOP蛋白表达减轻大鼠砷中毒肝细胞凋亡

薛启祥1,沈雪1,田甜1,韩冰1,谢汝佳1,何艳2,杨勤1   

  1. 1. 贵州省贵阳市云岩区北京路9号贵阳医学院
    2. 贵阳医学院
  • 收稿日期:2014-12-26 修回日期:2015-03-30 出版日期:2015-06-05 发布日期:2015-05-27
  • 通讯作者: 杨勤 E-mail:qinyang@gmc.edu.cn
  • 基金资助:
    国家自然科学基金资助项目

Metallothionein decreases the expression of GRP78 and CHOP proteins to reduce hepatocyte apoptosis of arsenic poisoning rats

  • Received:2014-12-26 Revised:2015-03-30 Online:2015-06-05 Published:2015-05-27

摘要: 目的 研究葡萄糖调节蛋白78(GRP78)、环磷酸腺苷反应元件结合转录因子同源蛋白(CHOP)在金属硫蛋白(MT)减轻大鼠砷中毒肝细胞凋亡中的作用。方法 建立MT治疗亚砷酸钠(NaAsO2)诱导的大鼠砷中毒肝损伤模型,用MT治疗2周,以TUNEL法检测肝细胞凋亡,免疫组化法、Western blot检测大鼠肝脏GRP78、CHOP蛋白表达。结果 砷中毒模型组大鼠肝细胞凋亡、肝组织GRP78和CHOP蛋白表达较正常对照组显著升高(P<0.05),MT治疗组肝细胞凋亡、肝组织GRP78和CHOP蛋白表达明显回降(P<0.05),但仍然高于对照组(P<0.05)。结论 MT有通过降低GRP78和CHOP蛋白表达减轻大鼠砷中毒肝细胞凋亡。

关键词: 金属硫蛋白, 砷中毒, 肝损伤, 凋亡, 内质网应激, GRP78, CHOP

Abstract: Objective To study the function of GRP78 and CHOP in the process of reducing arsenic poisoning rat’s hepatocyte apoptosis by metallothionein.Methods Established the model of NaAsO2-induced liver injury and treatment with MT for two weeks.The apoptosis of hepatic cell was detected by TUNEL.The expression of GRP78 and CHOP protein in each group was detected by immunohistochemistry and western blotting.Results Compared with normal rats, the apoptosis and the expression of GRP78 and CHOP protein of hepatic cells in the model group were significantly increased (P<0.05). Compared with the model group,the apoptosis and the expression of GRP78 and CHOP protein of hepatic cells in the treatment group with MT were significantly reduced (P<0.05).Conclusion MT may be reduce arsenic poisoning rat’s hepatocyte apoptosis by decreasing GRP78 and CHOP protein expression.

Key words: metallothione, arsenic poisoning, liver injury, apoptosis, endoplasmic reticulum stress, GRP78, CHOP

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