p53打开了线粒体的透性过渡孔,从而触发了死
Angelina V Vaseva1, Natalie D Marchenko, Kyungmin Ji
1Department of Pathology, Stony Brook University, Stony Brook, NY 11794, USA.
Cell
|June 26, 2012
概括
这项研究揭示了p53蛋白在氧化应激过程中通过与线粒体中的环素D相互作用触发死亡. 阻止这种相互作用可以防止中风,突出显示出缺血的新治疗点.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 神经科学是一个神经科学.
背景情况:
- 缺血导致氧化损伤和亡,导致显著的组织损失.
- 蛋白质p53是一个关键的压力传感器,参与了亡和自.
- 对于p53在氧化应激诱导的亡中的作用尚不清楚.
研究的目的:
- 调查p53是否可以激活氧化应激反应的死亡.
- 为了阐明p53-介导亡的信号机制.
- 确定p53-cyclophilin D相互作用在中风病理学中的作用.
主要方法:
- 研究了氧化应激条件下的p53定位和功能.
- 研究了p53和线粒体中环素D (CypD) 之间的相互作用.
- 使用大脑缺血/再输液损伤的小鼠模型.
- 评估了降低p53和循环氨酸A治疗对中风结果的影响.
主要成果:
- 在氧化应激时,p53在线粒体基质中积聚,触发线粒体透性过渡孔 (PTP) 开放和死亡.
- 对于PTP开放和死来说,p53和CypD之间的物理相互作用是必不可少的.
- 在脑缺血/再输损伤期间观察到p53-CypD复合物的形成.
- 降低p53水平或抑制p53-CypD与环素A的相互作用,可以防止中风.
结论:
- 线粒体p53-CypD轴是氧化应激诱导死亡的关键媒介.
- 这个轴在中风的病理学中起着重要作用.
- 针对p53-CypD相互作用可能为中风和其他与缺血相关的疾病提供一种新的治疗策略.
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