Mitophagy of damaged mitochondria occurs locally in distal neuronal axons and requires PINK1 and Parkin.
Mitophagy of damaged mitochondria occurs locally in distal neuronal axons and requires PINK1 and Parkin.
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DOI:
10.1083/jcb.201401070
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发表时间:
2014-09-01
期刊:
影响因子:
--
通讯作者:
Schwarz TL
中科院分区:
文献类型:
--
作者:
Ashrafi G;Schlehe JS;LaVoie MJ;Schwarz TL
The Parkinson’s disease–associated proteins PINK1 and Parkin mediate local mitophagy of dysfunctional mitochondria in distal neuronal axons, abrogating the need for retrograde organelle transport and ensuring rapid neuroprotection. To minimize oxidative damage to the cell, malfunctioning mitochondria need to be removed by mitophagy. In neuronal axons, mitochondrial damage may occur in distal regions, far from the soma where most lysosomal degradation is thought to occur. In this paper, we report that PINK1 and Parkin, two Parkinson’s disease–associated proteins, mediate local mitophagy of dysfunctional mitochondria in neuronal axons. To reduce cytotoxicity and mimic physiological levels of mitochondrial damage, we selectively damaged a subset of mitochondria in hippocampal axons. Parkin was rapidly recruited to damaged mitochondria in axons followed by formation of LC3-positive autophagosomes and LAMP1-positive lysosomes. In PINK1−/− axons, damaged mitochondria did not accumulate Parkin and failed to be engulfed in autophagosomes. Similarly, initiation of mitophagy was blocked in Parkin−/− axons. Our findings demonstrate that the PINK1–Parkin-mediated pathway is required for local mitophagy in distal axons in response to focal damage. Local mitophagy likely provides rapid neuroprotection against oxidative stress without a requirement for retrograde transport to the soma.
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DOI:
10.1523/jneurosci.6412-10.2011
发表时间:
2011-05-25
期刊:
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子:
--
作者:
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通讯作者:
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影响因子:
3.5
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通讯作者:
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DOI:
10.1083/jcb.200601067
发表时间:
2006-05-22
期刊:
The Journal of cell biology
影响因子:
--
作者:
Glater EE;Megeath LJ;Stowers RS;Schwarz TL
通讯作者:
Schwarz TL
DOI:
10.1083/jcb.201106120
发表时间:
2012-02-20
期刊:
The Journal of cell biology
影响因子:
--
作者:
Maday S;Wallace KE;Holzbaur EL
通讯作者:
Holzbaur EL
影响因子:
5.3
作者:
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通讯作者:
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