›› 2012, Vol. 24 ›› Issue (5): 349-351.doi: 10.3969/j.issn.1004-616x.2012.05.006

• 论著 • 上一篇    下一篇

微囊藻毒素-LR对PC12细胞氧化性损伤作用的实验研究

周珏;刘冉;李晓波;杨菲飞;李云晖   

  1. ( 东南大学公共卫生学院环境医学工程教育部重点实验室,江苏 南京 210009 )
  • 收稿日期:2012-02-22 修回日期:2012-06-17 出版日期:2012-09-30 发布日期:2012-09-30
  • 通讯作者: 李云晖

Preliminary study on toxic effects of microcystins-LR in PC12 cells

ZHOU Jue;LIU Ran;LI Xiao-bo;YANG Fei-fei;LI Yun-hui   

  1. (Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, Jiangsu, China)
  • Received:2012-02-22 Revised:2012-06-17 Online:2012-09-30 Published:2012-09-30
  • Contact: LI Yun-hui

摘要: 目的: 探讨微囊藻毒素-LR (microcystins-LR,MC-LR)对PC12细胞的毒性作用及其机制。方法:用MC-LR对PC12细胞进行染毒,以MTT法测定其对细胞的毒性作用;同时通过测定细胞培养液和细胞内的氧化应激指标初步判断MC-LR对细胞的氧化损伤作用。结果: MC-LR染毒12、24、48 h,对PC12细胞的半数抑制浓度 (IC50)分别是89.06、47.24、33.13 μg/L。MC-LR染毒24 h 后,细胞培养液中乳酸脱氢酶(LDH)活性升高。当染毒浓度大于等于10 μg/L时,细胞中生成丙二醛(MDA)和超氧化物歧化酶(SOD)的含量随着染毒浓度的增加逐渐升高(P<0.05);过氧化氢酶(CAT)含量的变化和SOD具有一致性。而谷胱甘肽过氧化物酶(GSH-Px)含量与对照组相比未见显著差异(P>0.05)。结论:MC-LR可以抑制PC12细胞的增殖能力和引起细胞膜损伤,并发生氧化损伤作用。

关键词: 微囊藻毒素, 神经毒性, PC12细胞, 乳酸脱氢酶, 氧化损伤

Abstract: OBJECTIVE: To study the toxic oxidative damage in PC12 cells caused by microcystins-LR ( MC-LR). METHODS: MTT assays and lactate dehydrogenase (LDH) in culture medium of PC12 cells were performed to assess the toxicity of MC-LR. The contents of MDA,SOD,GSH-Px and CAT were measured with kits. RESULTS:MTT assay showed that MC-LR had an inhibitory effect on PC12 cells,and the IC50 of MC-LR were 89.06,47.24,33.13 μg/L at 12 h,24 h and 48 h,respectively. Twenty-four hours after treatment by MC-LR,the production of LDH in culture medium was increased. Compared with control group,the contents of MDA and SOD were apparent when MC-LR was more than 10 μg/L (P<0.05). The catalase activity change was similar to SOD. GSH-Px content showed no significant difference compared with the control group. CONCLUSION: MC-LR could inhibit proliferation and induce membrane damage and oxidative damage in PC12 cells.

Key words: microcystin-LR, neurotoxicity, PC12 cells, lactate dehydrogenase, oxidative damage