首都医科大学学报 ›› 2002, Vol. 23 ›› Issue (1): 14-16.

• 基础研究 • 上一篇    下一篇

二价锰和三价锰对神经瘤细胞线粒体膜电位的影响

刘祯1, 李国君1, 张杰1, 周春艺1, 李鹏高1, 赵春礼2, 杨慧2, Wei Zheng3, 景鹏4   

  1. 1. 首都医科大学公共卫生与家庭医学学院;2. 北京神经科学研究所;3. School of Public Health, Columbia University;4. 首都医科大学解剖研究室
  • 收稿日期:2001-12-20 修回日期:1900-01-01 出版日期:2002-01-15 发布日期:2002-01-15

Effects of Manganese with Different Valences on Mitochondrial Membrane Potential in Human SH-SY5Y Cells in Vitro

Liu Zhen1, Li Guojun1, Zhang Jie1, Zhou Chunyi1, Li Penggao1, Zhao Chunli2, Yang Hui2, Wei Zheng3, Jing Peng4   

  1. 1. School of Public Health and Family Medicine, Capital University of Medical Sicences;2. Beijing Institute of Neuroscience;3. School of Public Health, Columbia University;4. Department of Anatomy, Capital University of Medical Sicences
  • Received:2001-12-20 Revised:1900-01-01 Online:2002-01-15 Published:2002-01-15

摘要: 采用0.25、0.50、0.75mmol/L的二价锰和三价锰分别对神经瘤细胞(SH-SY5Y)染毒24h,通过线粒体特异性染料罗丹明123进行荧光标记,利用激光扫描共聚焦显微镜观察染毒细胞的膜电位变化,并与未染毒的细胞对照组进行比较。结果表明二价锰和三价锰均可引起线粒体膜电位的改变(P<0.05),且随剂量增高,有降低趋势。此外,在0.50mmol/L和0.75mmol/L剂量下,三价锰引起的线粒体膜电位改变比二价锰更为明显。提示线粒体膜电位的改变是锰神经细胞毒性作用的重要环节。

关键词: 锰, 激光扫描共聚焦显微镜, 线粒体, 膜电位

Abstract: Human dopaminergic SH-SY5Y cells were exposed to manganese of bivalence and trivalence at the concentrations of 0.25, 0.50, 0.75 mmol/L for 24 h respectively. The mitochondrial potential was determined by incubating the culture with Rhodamine 123, a mitochondrial specific dye, followed by laser scanning confocal microtechnique(LCSM)analyses of fluorescence signal. Results showed that Mn(Ⅱ)and Mn(Ⅲ)treatment significantly decreased fluorescence signal as compared to the controls, suggesting a diminished mitochondrial membrane potential after Mn treatment. The effects were Mn-concentration dependent. In addition, we found that Mn(Ⅲ)appeared to be more cytotoxic than Mn(Ⅱ)in altering mitochondrial membrane potential at the concentration of 0.50 mmol/L and 0.75 mmol/L. These data confirm that mitochondria may serve as the primary target for Mn cytotoxicity by altering the membrane potential.

Key words: manganese, laser scanning confocal microtechnique(LCSM), mitochondria, membrane potential

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