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Intermittent ischemia/reperfusion as a potent insulin-sensitizing intervention via blood flow enhancement and muscle decanoyl-l-carnitine suppression
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Intermittent ischemia/reperfusion as a potent insulin-sensitizing intervention via blood flow enhancement and muscle decanoyl-l-carnitine suppression
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Journal Article
Intermittent ischemia/reperfusion as a potent insulin-sensitizing intervention via blood flow enhancement and muscle decanoyl-l-carnitine suppression
2025
Overview
A single bout of exercise improves muscle insulin sensitivity for up to 48 hours via AMPK. Limb ischemia activates AMPK in muscle, and subsequent reperfusion enhances insulin-stimulated vasodilation, potentially eliciting a more pronounced exercise effect with reduced workload. We investigated the combined effect of upper leg intermittent ischemia/reperfusion (IIR) and continuous knee-extension exercise on muscle insulin sensitivity regulation. We found that IIR exercise potentiated AMPK activation and muscle insulin sensitivity. The potentiating effect of ПВ exercise on muscle insulin sensitivity was associated with increased insulin-stimulated blood flow in parallel with enhanced phosphorylation of endothelial nitric oxide synthase. Metabolomics analyses demonstrated a suppression of muscle medium-chain acylcarnitines during IIR exercise, which correlated with insulin sensitivity and was consistent with findings in isolated rat muscle treated with decanoyl-.carnitine. Collectively, combining IIR with low- to moderate-intensity exercise may represent a promising intervention to effectively enhance muscle insulin sensitivity. This approach could offer potential for mitigating muscle insulin resistance in clinical settings and among individuals with lower physical activity levels.
Publisher
American Society for Clinical Investigation
Subject
