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Adipose tissue, metabolic and inflammatory responses to stroke are altered in obese mice
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Adipose tissue, metabolic and inflammatory responses to stroke are altered in obese mice
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Journal Article
Adipose tissue, metabolic and inflammatory responses to stroke are altered in obese mice
2017
Overview
Obesity is an independent risk factor for stroke, though several clinical studies have reported that obesity improves stroke outcome. Obesity is hypothesised to aid recovery by protecting against post-stroke catabolism. We therefore assessed whether obese mice had an altered metabolic and inflammatory response to stroke. Obese ob/ob mice underwent 20 min middle cerebral artery occlusion and 24 h reperfusion. Lipid metabolism and expression of inflammatory cytokines were assessed in the plasma, liver and adipose tissue. The obese-specific metabolic response to stroke was assessed in plasma using non-targeted UPLC-MS metabolomics coupled with univariate and multivariate analysis. Obesity had no effect on the extent of weight loss 24 h after stroke but affected the metabolic and inflammatory responses to stroke, predominantly affecting lipid metabolism. Specifically, obese mice had increases in plasma free fatty acids and expression of adipose lipolytic enzymes. Metabolomics identified several classes of metabolites affected by stroke in obese mice, including fatty acids and membrane lipids (glycerophospholipids, lysophospholipids and sphingolipids). Obesity also featured increases in inflammatory cytokines in the plasma and adipose tissue. Overall these results demonstrate that obesity affected the acute metabolic and inflammatory response to stroke and suggest a potential role for adipose tissue in this effect. These findings could have implications for longer-term recovery and also further highlight the importance of considering comorbidities in preclinical stroke research, especially when identifying biomarkers for stroke. However, further work is required to assess whether these changes translate into long-term effects on recovery.
Publisher
The Company of Biologists Ltd,The Company of Biologists
Subject
/ Adipose Tissue - physiopathology
/ Animals
/ Body fat
/ Chromatography, High Pressure Liquid
/ Enzymes
/ Fatty Acids, Nonesterified - blood
/ Glucose
/ Glycerol
/ Infarction, Middle Cerebral Artery - blood
/ Infarction, Middle Cerebral Artery - complications
/ Infarction, Middle Cerebral Artery - physiopathology
/ Inflammation Mediators - blood
/ Ischemia
/ Lipids
/ Liver
/ Male
/ Obesity
/ Plasma
/ Stroke
/ Surgery
