Abstract
This study aimed to investigate whether fecal microbiota transplantation (FMT) provides protection for stroke injury in obese patients. Rats were fed high-fat diet (HFD) for 4 weeks and subjected to middle cerebral artery occlusion (MCAO). After FMT for 30 days, body weight, serum total cholesterol and triglyceride levels, neurological score, brain water content, and cerebral infarction volume were measured. Brain reactive oxygen species, superoxide dismutase and malondialdehyde were detected and the levels of Bcl-2, Bax and cleaved caspase-3 were examined. Rats fed with HFD had higher body weight and higher serum total cholesterol and triglyceride levels. Neurological score was lower, brain water content and cerebral infarction volume were higher in obese rats following MCAO, but FMT improved neurological deficit. Moreover, oxidative stress was enhanced in obese rats following MCAO, but FMT attenuated oxidative stress. Brain Bcl-2 level was lower while Bax and cleaved caspase-3 levels were higher in obese rats following MCAO, but FMT increased brain Bcl-2 level and decreased Bax and cleaved caspase-3 levels. In conclusion, FMT attenuated cerebral ischemic injury in obese rats and the beneficial effects of FMT may be mediated by the attenuation of oxidative stress and apoptosis in the brain.
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