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2015 ; 2015
(ä): 903186
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Alpha-Lipoic Acid Attenuates Cerebral Ischemia and Reperfusion Injury via Insulin
Receptor and PI3K/Akt-Dependent Inhibition of NADPH Oxidase
#MMPMID26294909
Dong Y
; Wang H
; Chen Z
Int J Endocrinol
2015[]; 2015
(ä): 903186
PMID26294909
show ga
Alpha-lipoic acid (ALA) has various pharmacological effects such as
antioxidative, anti-inflammatory, and antiapoptotic properties. In the present
study, administration of ALA (40?mg/kg, i.p.) for 3 days resulted in a
significant decrease in neuronal deficit score and infarct volume and a
significant increase in grip time and latency time in Morris water maze at 48?h
after middle cerebral artery occlusion and reperfusion (MCAO/R) in rats. ALA also
reduced the increased TUNEL-positive cells rate and the enhanced caspase-3
activity induced by MCAO/R. However, the underlying mechanisms remain poorly
understood. In this study, we found that ALA could activate insulin receptor and
PI3K/Akt signaling pathways, inhibit the expression and activity of NADPH
oxidase, and subsequently suppress the generation of superoxide and the augment
of oxidative stress indicators including MDA, protein carbonylation, and 8-OHdG.
In conclusion, ALA attenuates cerebral ischemia and reperfusion injury via
insulin receptor and PI3K/Akt-dependent inhibition of NADPH oxidase.