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2017 ; 13
(3
): 473-485
Nephropedia Template TP
gab.com Text
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English Wikipedia
PARK2-dependent mitophagy induced by acidic postconditioning protects against
focal cerebral ischemia and extends the reperfusion window
#MMPMID28103118
Shen Z
; Zheng Y
; Wu J
; Chen Y
; Wu X
; Zhou Y
; Yuan Y
; Lu S
; Jiang L
; Qin Z
; Chen Z
; Hu W
; Zhang X
Autophagy
2017[Mar]; 13
(3
): 473-485
PMID28103118
show ga
Prompt reperfusion after cerebral ischemia is critical for neuronal survival. Any
strategies that extend the limited reperfusion window will be of great
importance. Acidic postconditioning (APC) is a mild acidosis treatment that
involves inhaling CO(2) during reperfusion following ischemia. APC attenuates
ischemic brain injury although the underlying mechanisms have not been
elucidated. Here we report that APC reinforces ischemia-reperfusion-induced
mitophagy in middle cortical artery occlusion (MCAO)-treated mice, and in
oxygen-glucose deprivation (OGD)-treated brain slices and neurons. Inhibition of
mitophagy compromises neuroprotection conferred by APC. Furthermore, mitophagy
and neuroprotection are abolished in Park2 knockout mice, indicating that
APC-induced mitophagy is facilitated by the recruitment of PARK2 to mitochondria.
Importantly, in MCAO mice, APC treatment extended the effective reperfusion
window from 2 to 4 h, and this window was further extended to 6 h by exogenously
expressing PARK2. Taken together, we found that PARK2-dependent APC-induced
mitophagy renders the brain resistant to ischemic injury. APC treatment could be
a favorable strategy to extend the thrombolytic time window for stroke therapy.
|*Ischemic Postconditioning
[MESH]
|*Mitophagy
[MESH]
|Animals
[MESH]
|Brain Ischemia/complications/*pathology/*prevention & control
[MESH]