卡斯帕斯-12调解了内细胞网络特异性亡和细胞毒性,通过粉样ββ调解
T Nakagawa1, H Zhu, N Morishima
1Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, USA.
Nature
|January 19, 2000
概括
卡斯巴-12因细胞应激而触发特定于内质网膜 (ER) 的编程细胞死亡. 缺乏caspase-12的小鼠抵抗了ER压力诱导的亡,并显示出来自β-粉样蛋白的神经毒性降低.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 神经科学是一个神经科学.
背景情况:
- 细胞亡 (被编程的细胞死亡) 对于发育和恒常状态至关重要.
- 卡斯帕斯是细胞亡的关键媒介,有14个已识别的家族成员.
- ER压力可以诱导亡,但具体的调解者尚不清楚.
研究的目的:
- 调查卡斯帕斯-12在内分泌网膜 (ER) 压力诱导的亡中的作用.
- 为了确定caspase-12是否调解ER特定的亡途径.
- 为了探索caspase-12在神经毒性中的参与.
主要方法:
- 在ER内对caspase-12的定位研究.
- 在各种压力条件下对caspase-12进行激活测试.
- 在caspase-12缺乏的小鼠和神经元中分析亡.
主要成果:
- 卡斯巴-12局部化到ER,并通过ER压力 (破坏,蛋白质积累) 激活.
- 卡斯帕-12并不是由膜或线粒体的亡信号激活的.
- 缺乏Caspase-12的小鼠对ER压力诱导的亡具有抵抗力.
- 卡斯帕-12缺乏的神经元在对β-粉样蛋白的反应中表现出缺陷的亡,而不是其他刺激.
结论:
- 卡斯巴-12调解了一种特定的途径,用于诱导源自ER压力的亡.
- 卡斯巴-12在粉样β诱导的神经毒性中起作用.
- 向caspase-12可能是涉及ER压力的神经退行性疾病的策略.
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