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中国临床药理学与治疗学 ›› 2005, Vol. 10 ›› Issue (4): 377-381.

• 研究原著 • 上一篇    下一篇

盐酸埃他卡林对H2O2所致PC12细胞损伤的保护

柴怡, 丁建花, 李皓, 胡刚   

  1. 南京医科大学药理学与神经生物学系, 南京 210029, 江苏
  • 收稿日期:2005-03-08 修回日期:2005-04-15 出版日期:2005-04-26 发布日期:2020-11-19
  • 通讯作者: 胡刚, 男, 博士, 教授, 博士生导师, 研究方向为神经退行性疾病的病因学与实验治疗学。Tel:025-8686-3108 E-mail:ghu@njmu.edu.cn
  • 作者简介:柴怡, 女, 硕士研究生。
  • 基金资助:
    国家创新药物基础研究重大项目(NO969010101); 国家自然科学基金资助项目(NO39970846)

Effects of iptakalim hydrochloride on H2O2 induced cytotoxicity in pheochromocytoma(PC12) cells

CHAI Yi, DING Jian-hua, LI Hao, HU Gang   

  1. Department of Pharmacology and Neurobiology, Nanjing Medical University, Nanjing 210029, Jinagsu, china
  • Received:2005-03-08 Revised:2005-04-15 Online:2005-04-26 Published:2020-11-19

摘要: 目的: 研究 KATP 通道开放剂盐酸埃他卡林(iptakalim hydrochloride, Ipt) 对 H2O2 所致 PC12 细胞损伤的保护作用及其作用机制。方法: 采用培养的PC12细胞, MTT 法测定细胞存活率, HPLC 法测定细胞培养液中谷氨酸(Glu) 的含量, 荧光法测定胞内钙离子([Ca2+]i) 浓度。结果: Ipt 可浓度依赖性的拮抗H2O2 介导的细胞毒性, 提高细胞生存率, 降低胞外Glu的释放以及胞内 Ca2+ 浓度。该保护作用可被200 μmol°L-1 5-HD(线粒体K ATP 通道阻断剂) 部分拮抗。结论: Ipt 可拮抗 H2O2 介导的细胞损伤作用, 该保护作用可能与线粒体ATP 敏感性钾通道相关。

关键词: 盐酸埃他卡林, ATP 敏感性钾通道, PC12细胞, 氧化应激, 谷氨酸, 游离钙

Abstract: AIM: To investigate the protective effects and mechanisms of iptakalim hydrochloride(Ipt) on H2O2 induced neurotoxity. METHODS: Neurotoxity injury was induced by H2O2 in PC12 cells.The cell viability was tested by MTT assay. The glutamate released from PC12 cells was measured by HPLC combined with fluorescent detector analysis.Changes in the intracellular free Ca2+ concentration ([Ca2+]i) were determined in fluo-3 AM loaded PC12 cells.RESULTS: Ipt (1, 10 and 100μmol°L-1) markedly mitigated H2O2 -induced neurotoxi-ty, 10μmol°L-1 Ipt inhibited the release of glutamate and the increase of ([Ca2+]i) induced by H2O2. The pro-tective effectswas incompletely blocked by 5-HDwhich is a mitochondrial K ATP channels antagnist. CONCLUSION: Ipt provides neuroprotective effects on H2O2 in-duced cytoxixity in cultured PC12 cells and the protective effects may be partially related with mitochondrial KATP channels.

Key words: iptakalim hydrochloride, ATP-sensitive potassium channels, PC12 cell, oxidative stress, gluta-mate, intracellular free Ca2+

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