Abstract
Syndecan-4 (synd4) is a heparan sulfate proteoglycan, involved in repair following tissue damage, through modulating neovascularization and inflammation. In acute myocardial infarction its myocardial expression is up-regulated in a time-dependent manner, and in synd4-deficient mice severe cardiac dysfunction and abnormal remodeling are observed following induction of myocardial infarction. Here we explored the therapeutic potential of sustained synd4 over-expression in the context of myocardial infarction. Adenovirus containing the synd4 gene (Ad-synd4), or corresponding control adenovirus (Ad-null), was administered intramyocardially in rats immediately after induction of myocardial infarction. Cardiac function was ascertained by echocardiography, hemodynamic assessment and brain natriuretic peptide level 28 days post-intervention. Hearts were excised for molecular and histological analyses at predetermined time points. We observed reduced mortality and improved cardiac function post-myocardial infarction in the Ad-synd4 as compared to the Ad-null group, with associated attenuation of cardiac remodeling, less myocyte loss and reduced fibrosis. Additionally, the Ad-synd4 group exhibited endothelial cell activation and increased...Continue Reading
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