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• W4367369913 abstract "Abstract The maintenance of phospholipid homeostasis is increasingly being implicated in metabolic health. Phosphatidylethanolamine (PE) is the most abundant phospholipid on the inner leaflet of cellular membranes, and we have previously shown that mice with a heterozygous ablation of the PE synthesizing enzyme, Pcyt2 (Pcyt2+/−), develop obesity, insulin resistance, and NASH. Skeletal muscle is a major determinant of systemic energy metabolism, making it a key player in metabolic disease development. Both the total PE levels and the ratio of PE to other membrane lipids in skeletal muscle are implicated in insulin resistance; however, the underlying mechanisms and the role of Pcyt2 regulation in this association remain unclear. Here, we show how reduced phospholipid synthesis due to Pcyt2 deficiency causes Pcyt2+/- skeletal muscle dysfunction and metabolic abnormalities. Pcyt2+/- skeletal muscle exhibits damage and degeneration, with skeletal muscle cell vacuolization, disordered sarcomeres, mitochondria ultrastructure irregularities and paucity, inflammation, and fibrosis. There is intramuscular adipose tissue accumulation, and major disturbances in lipid metabolism with impaired FA mobilization and oxidation, elevated lipogenesis, and long-chain fatty acyl-CoA, diacylglycerol, and triacylglycerol accumulation. Pcyt2+/− skeletal muscle exhibits perturbed glucose metabolism with elevated glycogen content, impaired insulin signaling, and reduced glucose uptake. Together, this study lends insight into the critical role of PE homeostasis in skeletal muscle metabolism and health with broad implications on metabolic disease development." @default.
• W4367369913 created "2023-04-30" @default.
• W4367369913 creator A5008956250 @default.
• W4367369913 creator A5051912258 @default.
• W4367369913 creator A5052250520 @default.
• W4367369913 date "2023-01-01" @default.
• W4367369913 modified "2023-10-04" @default.
• W4367369913 title "Skeletal Muscle Consequences of Phosphatidylethanolamine Synthesis Deficiency" @default.
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• W4367369913 doi "https://doi.org/10.1093/function/zqad020" @default.
• W4367369913 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37342414" @default.

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