基础医学与临床 ›› 2013, Vol. 33 ›› Issue (6): 648-654.

• 研究论文 • 上一篇    下一篇

DJ-1可通过增强自噬水平缓解鱼藤酮致MN9D细胞损伤

刘慧丰1,杨巍巍2,高华3,杨慧4   

  1. 1. 北京王府中西医结合医院
    2. 首都医科大学神经生物系
    3. 北京市神经外科研究所
    4. 首都医科大学
  • 收稿日期:2013-03-18 修回日期:2013-04-24 出版日期:2013-06-05 发布日期:2013-05-29
  • 通讯作者: 杨慧 E-mail:huiyang0105@sina.com
  • 基金资助:
    国家重点基础研究发展计划;国家重点基础研究发展计划;自发性高血压大鼠心、脑、肾和肠系膜微动脉缝隙连接特性的比较研究》国家自然科学基金(国家自然科学基金);北京市自然基金重点项目

DJ-1 protect against rotenone-induced cell injuries via enhancing autophaty in MN9D cells

  • Received:2013-03-18 Revised:2013-04-24 Online:2013-06-05 Published:2013-05-29
  • Supported by:
    National Basic Research Program of China;National Basic Research Program of China

摘要: 目的 探讨DJ-1对MN9D细胞的保护作用及具体机制。方法 在MN9D细胞中瞬时转染DJ-1质粒,利用MTT法及流式细胞术分别检测MN9D细胞活力与凋亡水平。通过激光共聚焦显微镜(confocal)观察LC3自噬点数量。利用Western blot法检测LC3II/LC3I的比值。结果 过表达DJ-1能部分恢复鱼藤酮引起的细胞活力下降(P<0.05)且可以减少鱼藤酮引起的MN9D细胞凋亡(P<0.05)。过表达DJ-1增加了鱼藤酮处理的MN9D细胞内荧光点的数量(P<0.001)且使LC3Ⅱ/Ⅰ的比值增高显著(P<0.001),应用3-MA干预后,细胞内荧光点数量回落到基础水平,且LC3Ⅱ/Ⅰ的比值明显降低(P<0.05)。同时应用自噬抑制剂3-MA干预后,DJ-1的细胞保护作用消失。结论 DJ-1通过激活自噬,起保护作用能减轻鱼藤酮引起的毒性。

关键词: 自噬, MN9D细胞, 鱼藤酮, 3-MA

Abstract: Objective To explore the protective effect of DJ-1 on MN9D cells and its mechanisms. Methods Transiently transfected wild type DJ-1 into MN9D cells. The MN9D cell viability and cell apoptosis level were observed by MTT assay and flow cytometry, respectively. The numbers of LC3-positive puncta were observed by confocal images. The ratio of LC3II to LC3I was detected via Western blot. Results DJ-1 overexpressing could attenuate decreased cell viability induced by rotenone treatment (P<0.05). The increased of apoptosis caused by rotenone was diminished by overexpression of DJ-1 (P<0.05). Overexpressing of DJ-1 could increase the numbers of LC3 positive puncta(P<0.001) and increase the ratio of LC3II to LC3I (P<0.001) in MN9D cells treated with rotenone. Giving 3-MA could make the numbers of LC3 positive puncta down to the basal level and reduce the ratio of LC3-II/I (P<0.05). Meanwhile, giving autophagy inhibitor 3-MA, the protective effects of DJ-1 on MN9D cells were disappeared. Conclusion DJ-1 upregulated the level of autophagy can relieve the toxin caused by rotenone in MN9D cells.

Key words: autophagy, MN9D cells, rotenone, 3-MA

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