Cyclosporin A inhibits caspase-independent death of NGF-deprived sympathetic neurons: a potential role for mitochondrial permeability transition.

Cyclosporin A inhibits caspase-independent death of NGF-deprived sympathetic neurons: a potential role for mitochondrial permeability transition.
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DOI:
10.1083/jcb.200112130
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发表时间:
2002-05-27
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Johnson EM Jr
Johnson EM Jr
中科院分区:
其他
文献类型:
--
作者:
Chang LK;Johnson EM Jr

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渗透性转换孔(PTP)的开放已被认为是细胞凋亡过程中发生的重要线粒体事件。我们研究了PTP在体外剥夺神经生长因子(NGF)的大鼠交感神经元的细胞死亡中的作用。去除NGF导致这些神经元经历经典的凋亡性细胞死亡,或者当用广谱半胱天冬酶抑制剂如boc-乙酰基(OMe)-氟甲基酮(BAF)处理时,发生延迟的非凋亡性细胞死亡。PTP抑制剂,环孢菌素A(CsA),阻止承诺死亡的存在下,BAF,所定义的能力,神经生长因子readdition拯救细胞,但承诺死亡的BAF的情况下几乎没有影响。CsA对BAF保存的细胞没有营养作用,但确实阻断了线粒体膜电位的下降。这些数据表明,PTP开放是一个关键的事件,在半胱天冬酶独立的,非凋亡(但不是半胱天冬酶依赖的,凋亡)的神经生长因子剥夺大鼠交感神经元死亡。
Opening of the permeability transition pore (PTP) has been implicated as an important mitochondrial event that occurs during apoptosis. We examined the role of the PTP in the well-characterized cell death of rat sympathetic neurons deprived of nerve growth factor (NGF) in vitro. Removal of NGF causes these neurons to undergo either a classic apoptotic cell death or, when treated with a broad-spectrum caspase inhibitor such as boc-aspartyl(OMe)-fluoromethylketone (BAF), a delayed, nonapoptotic cell death. The PTP inhibitor, cyclosporin A (CsA), blocked commitment-to-die in the presence of BAF, as defined by the ability of NGF readdition to rescue cells, but had little effect on commitment-to-die in the absence of BAF. CsA did not have trophic effects on BAF-saved cells, but did block the decrease in mitochondrial membrane potential. These data suggest that PTP opening is a critical event in caspase-independent, nonapoptotic (but not caspase-dependent, apoptotic) death of NGF-deprived rat sympathetic neurons.
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