Autosis and autophagic cell death: the dark side of autophagy.

Autosis and autophagic cell death: the dark side of autophagy.
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DOI:
10.1038/cdd.2014.143
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发表时间:
2015-03
影响因子:
12.4
通讯作者:
--
中科院分区:
生物学1区
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--
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细胞是否真的通过自噬死亡,或者在垂死的细胞中,自噬只是一个无辜的旁观者,或者是一个善意的“好心人”,试图阻止不可避免的细胞死亡,这是有争议的。然而,越来越多的证据表明,在某些情况下,自噬的遗传机制可能对细胞死亡至关重要。我们最近发现了一种新的自噬基因依赖性细胞死亡形式,称为自残,它是由Na+,K+- atp酶泵介导的,具有独特的形态学特征。高水平的细胞自噬,如自噬诱导肽治疗、饥饿或体内某些类型的缺血时发生的自噬,可触发自残。这些发现为在极端应激条件下预防细胞死亡的机制和策略提供了见解。
It is controversial whether cells truly die via autophagy or whether — in dying cells — autophagy is merely an innocent bystander or a well-intentioned ‘Good Samaritan' trying to prevent inevitable cellular demise. However, there is increasing evidence that the genetic machinery of autophagy may be essential for cell death in certain settings. We recently identified a novel form of autophagy gene-dependent cell death, termed autosis, which is mediated by the Na+,K+-ATPase pump and has unique morphological features. High levels of cellular autophagy, as occurs with treatment with autophagy-inducing peptides, starvation, or in vivo during certain types of ischemia, can trigger autosis. These findings provide insights into the mechanisms and strategies for prevention of cell death during extreme stress conditions.
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