Homocysteine induces mitochondrial dysfunction involving the crosstalk between oxidative stress and mitochondrial pSTAT3 in rat ischemic brain.

ABSTRACT: Homocysteine (Hcy) has been shown to have a neurotoxic effect on ischemic brain cells; however, the underlying mechanisms remain incompletely understood. Here, we examined whether Hcy treatment influences mitochondria injury, oxidative stress, and mitochondrial STAT3 (mitoStat3) expression in rat ischemic brain. Our results demonstrated that Hcy treatment aggravated the damage of mitochondrial ultrastructure in the brain cortex and the dentate gyrus region of the hippocampus after focal cerebral ischemia. An elevated Hcy level was also accompanied by the significant inhibition of mitochondrial complex I-III enzymatic activities in addition to an increase in cytochrome c release. 8-Hydroxy-2'-deoxyguanosine (8-OHdG) content and mitoStat3 protein phosphorylation level were increased in Hcy-t

SUBMITTER: Chen S 

PROVIDER: S-EPMC5537278 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature