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- W4289079984 abstract "Dilated cardiomyopathy, a type of heart muscle disease defined by the presence of left ventricular dilatation and contractile dysfunction, is an important cause of sudden cardiac death and heart failure. O-GlcNAcylation is an important post-translational modification of proteins by the addition of O-GlcNAc moieties at serine or threonine residues. Several studies have shown that proper control of O-GlcNAcylation is required for maintaining physiological function of heart by using Ogt (O-GlcNAc transferase) cardiomyocyte-specific knockout mouse models. In this study, we generated a new mouse model (αSMA-Ogt KO) in which Ogt was deleted in both cardiomyocytes and smooth muscle cells by crossing Ogt floxed mice with αSMA-Cre mice. αSMA-Cre-mediated Ogt deletion in mice led to severe postnatal lethality; the survived mice were smaller than control mice, had dilated hearts, and showed observable signs of heart failure. Moreover, the αSMA-Ogt KO heart had more apoptotic cells and fibrosis. The arteries of αSMA-Ogt KO mice exhibited significantly reduced expression of contractile genes and a trend towards arterial stiffness. In conclusion, our data emphasize the importance of OGT in maintaining normal heart function and reveal a novel role of OGT in regulating arterial contractility." @default.
- W4289079984 created "2022-08-01" @default.
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- W4289079984 date "2022-10-01" @default.
- W4289079984 modified "2023-10-16" @default.
- W4289079984 title "αSMA-Cre-mediated Ogt deletion leads to heart failure and vascular smooth muscle cell dysfunction in mice" @default.
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- W4289079984 doi "https://doi.org/10.1016/j.bbrc.2022.07.106" @default.
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