Mitophagy restricts BAX/BAK-independent, Parkin-mediated apoptosis.

Mitophagy restricts BAX/BAK-independent, Parkin-mediated apoptosis.
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DOI:
10.1126/sciadv.adg8156
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发表时间:
2023-05-24
期刊:
影响因子:
13.6
通讯作者:
Green, Douglas R.
Green, Douglas R.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Quarato, Giovanni;Mari, Luigi;Barrows, Nicholas J.;Yang, Mao;Ruehl, Sebastian;Chen, Mark J.;Guy, Cliff S.;Low, Jonathan;Chen, Taosheng;Green, Douglas R.

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Degradation of defective mitochondria is an essential process to maintain cellular homeostasis and it is strictly regulated by the ubiquitin-proteasome system (UPS) and lysosomal activities. Here, using genome-wide CRISPR and small interference RNA screens, we identified a critical contribution of the lysosomal system in controlling aberrant induction of apoptosis following mitochondrial damage. After treatment with mitochondrial toxins, activation of the PINK1-Parkin axis triggered a BAX- and BAK-independent process of cytochrome c release from mitochondria followed by APAF1 and caspase 9–dependent apoptosis. This phenomenon was mediated by UPS-dependent outer mitochondrial membrane (OMM) degradation and was reversed using proteasome inhibitors. We found that the subsequent recruitment of the autophagy machinery to the OMM protected cells from apoptosis, mediating the lysosomal degradation of dysfunctional mitochondria. Our results underscore a major role of the autophagy machinery in counteracting aberrant noncanonical apoptosis and identified autophagy receptors as key elements in the regulation of this process. Mitophagy counteracts Parkin-mediated apoptosis.
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