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• W3039264802 abstract "KATP channels in the vasculature composed of Kir6.1 regulate vascular tone and may contribute to the pathogenesis of endotoxemia. We used mice with cell-specific deletion of Kir6.1 in smooth muscle (smKO) and endothelium (eKO) to investigate this question. We found that smKO mice had a significant survival disadvantage compared with their littermate controls when treated with a sub-lethal dose of lipopolysaccharide (LPS). All cohorts of mice became hypotensive following bacterial LPS administration; however, mean arterial pressure in WT mice recovered to normal levels, whereas smKO struggled to overcome LPS-induced hypotension. In vivo and ex vivo investigations revealed pronounced cardiac dysfunction in LPS-treated smKO, but not in eKO mice. Similar results were observed in a cecal slurry injection model. Metabolomic profiling of hearts revealed significantly reduced levels of metabolites involved in redox/energetics, TCA cycle, lipid/fatty acid and amino acid metabolism. Vascular smooth muscle-localised KATP channels have a critical role in the response to systemic infection by normalising cardiac function and haemodynamics through metabolic homeostasis. KEY MESSAGES: • Mice lacking vascular KATP channels are more susceptible to death from infection. • Absence of smooth muscle KATP channels depresses cardiac function during infection. • Cardiac dysfunction is accompanied by profound changes in cellular metabolites. • Findings from this study suggest a protective role for vascular KATP channels in response to systemic infection." @default.
• W3039264802 created "2020-07-10" @default.
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• W3039264802 date "2020-07-06" @default.
• W3039264802 modified "2023-09-24" @default.
• W3039264802 title "Vascular KATP channels protect from cardiac dysfunction and preserve cardiac metabolism during endotoxemia" @default.
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• W3039264802 doi "https://doi.org/10.1007/s00109-020-01946-3" @default.
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