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- W3118132893 abstract "INTRODUCTION: Endothelial cell (EC) dysfunction results in reduced nitric oxide (NO) bioavailability leading to inflammation and thrombus formation Infectious agents like SARS-CoV-2 and influenza can infect ECs in multiple vascular beds from different organs in infected patients, especially in the lung The omega-3 fatty acid eicosapentaenoic acid (EPA) and its metabolites can preserve EC function and reduce inflammation These effects of EPA likely contribute to reduced cardiovascular events as reported in REDUCE-IT Currently, EPA is being tested in patients at risk for COVID-19 This study tested the effects of EPA on NO bioavailability in pulmonary ECs under conditions of inflammation induced by lipopolysaccharide (LPS) METHODS: Human lung microvascular endothelial cells (HMVEC-L) were pretreated with vehicle or EPA (40 μM) in 2% FBS for 2 h, then challenged with LPS at 200 ng/ml for 24 h Cells (including untreated controls) were stimulated with calcium ionophore to measure maximum production of NO and peroxynitrite (ONOO-) using tandem porphyrinic nanosensors RESULTS: HMVEC-L challenged with LPS showed a pronounced loss of NO bioavailability Cells treated with EPA increased NO release (20%, p<0 05) and decreased ONOO- release (14%, p<0 01) compared with LPS treatment The [NO]/[ONOO-] ratio, a marker of eNOS coupling efficiency, decreased by 39% (p<0 001) following exposure to LPS However, EPA increased the ratio by 39% (p<0 01) compared with LPS alone CONCLUSIONS: These findings indicate that EPA preserves NO bioavailability and reduces nitroxidative stress in pulmonary ECs following LPS treatment These studies indicate a protective effect of EPA on pulmonary ECs that may reduce the inflammatory changes caused by infectious agents such as influenza or SARS-CoV-2 among other stimuli" @default.
- W3118132893 created "2021-01-05" @default.
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- W3118132893 date "2020-12-11" @default.
- W3118132893 modified "2023-10-16" @default.
- W3118132893 title "379: Eicosapentaenoic Acid Preserves Pulmonary Endothelial Nitric Oxide Release Following LPS Challenge" @default.
- W3118132893 doi "https://doi.org/10.1097/01.ccm.0000727404.93482.b9" @default.
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