首页> 外文期刊>Brain research >Mitochondrial division inhibitor 1 (Mdivi-1) offers neuroprotection through diminishing cell death and improving functional outcome in a mouse model of traumatic brain injury
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Mitochondrial division inhibitor 1 (Mdivi-1) offers neuroprotection through diminishing cell death and improving functional outcome in a mouse model of traumatic brain injury

机译:线粒体分裂抑制剂1(MDIVI-1)通过减少细胞死亡和改善创伤性脑损伤的小鼠模型中的功能结果,提供神经保护作用

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摘要

Mitochondria dysfunction, an enormous potential crisis, has attracted increasing attention. Disturbed regulation of mitochondrial dynamics, the balance of mitochondrial fusion and fission, has been implicated in neurodegenerative diseases, such as Parkinson's disease and cerebral ischemia/reperfusion. However the role of mitochondrial dynamics in traumatic brain injury (TBI) has not been illuminated. The aim of the present study was to investigate the role of Mdivi-1, a small molecule inhibitor of a key mitochondrial fission protein dynamin-related protein 1 (Drp1), in TBI-induced cell death and functional outcome deficits. Protein expression of Drp1 was first investigated. Outcome parameters consist of motor test, Morris water maze, brain edema and lesion volume. Cell death was detected by propidium iodide (PI) labeling, and mitochondrial morphology was assessed using transmission electron microscopy. In addition, the expression of apoptosis-related proteins cytochrome c (cyt-c) and caspase-3 was investigated. Our findings showed that up-regulation of Drp1 expression started at 1 h post-TBI and peaked at 24 h, but inhibition of Drp1 by Mdivi-1 significantly alleviated TBI-induced behavioral deficits and brain edema, reduced morphological change of mitochondria, and decreased TBI-induced cell death together with lesion volume. Moreover, treatment with Mdivi-1 remarkably inhibited TBI-induced the release of cyt-c from mitochondria to cytoplasm, and activation of caspase-3 at 24 h after TBI. Taken together, these data imply that inhibition of Drp1 may help attenuate TBI-induced functional outcome and cell death through maintaining normal mitochondrial morphology and inhibiting activation of apoptosis. (C) 2015 Elsevier B.V. All rights reserved.
机译:线粒体功能障碍,巨大的潜在危机,引起了不断的关注。受到线粒体动力学的干扰调节,线粒体融合和裂变的平衡涉及神经退行性疾病,如帕金森病和脑缺血/再灌注。然而,线粒体动态在创伤性脑损伤中的作用尚未被阐明。本研究的目的是探讨MDIVI-1的作用,患有关键线粒体裂变蛋白发动蛋白1(DRP1)的小分子抑制剂,在TBI诱导的细胞死亡和功能结果缺陷中。首次研究DRP1的蛋白质表达。结果参数包括电机测试,莫里斯水迷宫,脑水肿和病变体积。通过碘化丙啶(PI)标记检测细胞死亡,使用透射电子显微镜评估线粒体形态。此外,研究了凋亡相关蛋白细胞色素C(CYT-C)和Caspase-3的表达。我们的研究结果表明,DRP1表达的上调在TBI后开始,并在24小时达到峰值,但MDIVI-1的DRP1抑制显着缓解了TBI诱导的行为缺陷和脑水肿,降低了线粒体的形态变化,降低了线粒体的形态变化,降低了TBI诱导的细胞死亡与病变体积一起。此外,用Mdivi-1治疗显着抑制TBI - 诱导从线粒体到细胞质的Cyt-C的释放,并在TBI后24小时激活Caspase-3。总之,这些数据意味着DRP1的抑制可以通过维持正常线粒体形态和抑制细胞凋亡的激活来帮助衰减TBI诱导的功能结果和细胞死亡。 (c)2015 Elsevier B.v.保留所有权利。

著录项

  • 来源
    《Brain research》 |2016年第null期|共10页
  • 作者单位

    Soochow Univ Coll Med Dept Forens Med Suzhou 215123 Peoples R China;

    Soochow Univ Coll Med Dept Forens Med Suzhou 215123 Peoples R China;

    Wannan Med Coll Dept Forens Med Wuhu 241002 Peoples R China;

    Soochow Univ Coll Med Dept Forens Med Suzhou 215123 Peoples R China;

    Soochow Univ Coll Med Dept Forens Med Suzhou 215123 Peoples R China;

    Soochow Univ Coll Med Dept Forens Med Suzhou 215123 Peoples R China;

    Soochow Univ Coll Med Dept Forens Med Suzhou 215123 Peoples R China;

    Soochow Univ Coll Med Dept Forens Med Suzhou 215123 Peoples R China;

    Suzhou Publ Secur Bur Wuzhong Branch Suzhou 215128 Peoples R China;

    Soochow Univ Coll Med Dept Forens Med Suzhou 215123 Peoples R China;

    Soochow Univ Coll Med Dept Forens Med Suzhou 215123 Peoples R China;

    Soochow Univ Coll Med Dept Forens Med Suzhou 215123 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 神经病学;
  • 关键词

    Traumatic brain injury; Mitochondrial fusion; Dynamin-related protein 1; Apoptosis;

    机译:创伤性脑损伤;线粒体融合;发电机相关蛋白1;细胞凋亡;

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