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• W4293560897 abstract "Cerebral ischemia is the most common cause of disability, the second most common cause of dementia, and the fourth most common cause of death in the developed world [Sveinsson OA, Kjartansson O, Valdimarsson EM. Heilablóðþurrð/heiladrep: Faraldsfræði, orsakir og einkenni [Cerebral ischemia/infarction - epidemiology, causes and symptoms]. Laeknabladid. 2014 May;100(5):271-9. Icelandic. doi:10.17992/lbl.2014.05.543]. Obesity has been associated with worse outcomes after ischemia in rats, triggering proinflammatory cytokine production related to the brain microvasculature. The way obesity triggers these effects remains mostly unknown. Therefore, the aim of this study was to elucidate the cellular mechanisms of damage triggered by obesity in the context of cerebral ischemia.We used a rat model of obesity induced by a 20% high fructose diet (HFD) and evaluated peripheral alterations in plasma (lipid and cytokine profiles). Then, we performed cerebral ischemia surgery using two-vessel occlusion (2VO) and analyzed neurological/motor performance and glial activation. Next, we treated endothelial cell line cultures with glutamate in vitro to simulate an excitotoxic environment, and we added 20% plasma from obese rats. Subsequently, we isolated EVs released from endothelial cells and treated primary cultures of astrocytes with them.Rats fed a HFD had an increased BMI with dyslipidemia and high levels of proinflammatory cytokines. Glia from the obese rats exhibited altered morphology, suggesting hyperreactivity related to neurological and motor deficits. Plasma from obese rats induced activation of endothelial cells, increasing proinflammatory signals and releasing more EVs. Similarly, these EVs caused an increase in NF-κB and astrocyte cytotoxicity. Together, the results suggest that obesity activates proinflammatory signals in endothelial cells, resulting in the release of EVs that simultaneously contribute to astrocyte activation." @default.
• W4293560897 created "2022-08-30" @default.
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• W4293560897 date "2022-08-30" @default.
• W4293560897 modified "2023-10-14" @default.
• W4293560897 title "Obesity induces extracellular vesicle release from the endothelium as a contributor to brain damage after cerebral ischemia in rats" @default.
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• W4293560897 doi "https://doi.org/10.1080/1028415x.2022.2078173" @default.
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