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中国临床药理学与治疗学 ›› 2007, Vol. 12 ›› Issue (6): 645-648.

• 基础研究 • 上一篇    下一篇

胰岛素样生长因子-1 对小鼠胰岛细胞凋亡的保护作用

刘晓红1, 陈洲2, 王燕萍1, 刘礼斌1   

  1. 1福建医科大学附属协和医院内分泌科, 福州350001, 福建;
    2福建医科大学药学院药理教研室, 福州350004, 福建
  • 收稿日期:2007-05-17 修回日期:2007-06-04 发布日期:2020-11-09
  • 通讯作者: 陈洲, 女, 硕士, 研究方向:胰岛β 细胞保护。Tel:0591-83569029 E-mail:Kellandchen1007 @Yahoo. com.cn
  • 作者简介:刘晓红, 女, 本科, 研究方向:胰岛β 细胞保护。Tel:0591-83357896-8452 E-mail:dokidoki@163. com
  • 基金资助:
    福建省教育厅资助项目(JA03087)

Protective effect of insulin-like growth factor-1 on apoptosis in murine pancreatic β-cells

LIU Xiao-hong1, CHEN Zhou2, WANG Yan-ping1, LIU Li-bin1   

  1. 1Department of Endocrinology, Union Hospital, Fujian Medical University, Fuzhou 350001, Fujian, China;
    2Department of Pharmacology, College of Pharmaceutical Sciences, Fujian Medical University, Fuzhou 350004, Fujian, China
  • Received:2007-05-17 Revised:2007-06-04 Published:2020-11-09

摘要: 目的:探讨胰岛素样生长因子-1(IGF-1)对第三丁基过氧化氢(tBHP)诱导小鼠胰岛β 细胞株MIN6 凋亡的保护作用。方法:体外培养小鼠胰岛β细胞株MIN6, 分为:对照组、tBHP(25 μmol/L)组、IGF-1(100 ng/mL)组和IGF-1 +tBHP 组。丫啶橙-溴化乙锭(AO-EB)荧光染色法及原位末端标记法(TUNEL)镜下观测各实验组细胞凋亡情况,Griess 法检测各实验组细胞内NO 水平。结果:25 μmol/L tBHP作用1 h 可诱导MIN6 细胞凋亡, 并使细胞内NO含量明显增加。预先经过100 ng/mL IGF-1 作用24 h 后, tBHP 诱导的MIN6 细胞凋亡明显减少, 同时细胞内NO 含量亦显著降低。结论:IGF-1 对tBHP诱导凋亡的小鼠胰岛β 细胞株MIN6 有一定的保护作用, 其机制可能与IGF-1 减少tBHP 诱导的NO 合成有关。

关键词: 胰岛素样生长因子-1, 胰岛β 细胞, 第三丁基过氧化氢, 凋亡, 保护

Abstract: AIM:To investigate the protective effect of insulin-like growth factor-1 (IGF-1)on apoptosis in murine pancreatic β-cellsMIN6 induced by tert-butyl hydroperoxide(tBHP).METHODS: MIN6 cells were cultured and divided into four groups: control group, tBHP (25 μmol/L)group, IGF-1(100 ng/mL)group and IGF-1 +tBHP group. Cell damage was detected by AO-EB staining and TUNEL assay. The levels of nitric oxidewere measured by Griess assay.RESULTS:Induced cell apoptosis and increased NO production were observed when MIN6 cells treated with 25 μmol/L of tBHP for 1 h, When the cells were pretreated with 100 ng/mL IGF-1 for 24 h before tBHP exposured, cell apoptosis induced by tBHP was significantly inhibited and NO production was also decreased.CONCLUSION:The present study suggests that IGF-1 has protective effect on apoptosis in murine pancreatic β-cells MIN6 induced by tBHP. The mechanism of this effect is possibly attributed to IGF-1 reduces NO production which induced by tBHP.

Key words: insulin-like growth factor-1, pancreatic β-cell, tert-butyl hydroperoxide, apoptosis, protection

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