Research Paper Volume 13, Issue 4 pp 6194—6204
USP30 protects against oxygen-glucose deprivation/reperfusion induced mitochondrial fragmentation and ubiquitination and degradation of MFN2
- 1 Department of Neurology, Second Xiangya Hospital, Central South University, Changsha 410011, Hunan, China
- 2 Department of Neurology, The Second People’s Hospital of Hunan Province, Changsha 410007, Hunan, China
- 3 Center for Medical Genetics, School of Life Sciences, Central South University, Changsha 410078, Hunan, China
- 4 Hunan Key Laboratory of Medical Genetics, Central South University, Changsha 410078, Hunan, China
- 5 Hunan Key Laboratory of Animal Model for Human Diseases, Central South University, Changsha 410078, Hunan, China
Received: July 24, 2020 Accepted: January 21, 2021 Published: February 19, 2021https://doi.org/10.18632/aging.202629
How to Cite
Copyright: © 2021 Chen et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Cerebral ischemia-reperfusion induces mitochondrial fragmentation and dysfunction, which plays a critical role in the subsequent neuronal death and neurological impairment. Protection of mitochondria is an effective strategy to prevent neuronal damage after cerebral ischemia-reperfusion injury. USP30 is a deubiquitinating enzyme that localizes to the outer mitochondrial membrane. USP30 participates in the regulation of mitophagy and maintenance of mitochondrial morphology. In this study, the neuroprotective effect of USP30 and the underlying mechanisms were assessed in an ischemia-reperfusion injury model. SK-N-BE (2) cells were subjected to oxygen-glucose deprivation/reperfusion (OGDR) insult. Ubiquitination of mitochondrial proteins is increased during the early stage of reperfusion after oxygen-glucose deprivation (OGD), but the ubiquitination of cytoplasmic proteins exhibits no obvious changes. OGDR insult also induces rapid ubiquitination and degradation of the mitochondrial fusion protein mitofusin 2 (MFN2) in the early stage of reperfusion after OGD. Overexpression of MFN2 attenuates OGDR induced mitochondrial fragmentation. USP30 overexpression suppresses OGDR-induced ubiquitination and degradation of MFN2, and protects against mitochondrial fragmentation. Therefore, precisely targeting USP30 may provide a novel therapeutic strategy for cerebral ischemia-reperfusion related disorders.