MicroRNA-423-5p targets O-GlcNAc transferase to induce apoptosis in cardiomyocytes

Molecular Medicine Reports
Peng LuoGang Li

Abstract

Congestive heart failure (CHF) remains the single most prevalent cause of mortality and morbidity; therefore, the identification of novel biomarkers is required for the diagnosis of CHF. The aim of the present study was to examine whether microRNA (miR)-423-5p is a novel biomarker for CHF, which was defined by the circulatory biomarker pro-brain natriuretic peptide (BNP). Samples of plasma from patients with CHF and healthy controls were collected and used for quantitative polymerase chain reaction analysis. In addition, the O-GlcNAc transferase (OGT) 3' untranslated region was cloned and used for a luciferase assay. The effects of the expression of miR-423-5p in cardiomyocytes were determined using western blotting and terminal deoxynucleotidyl transferase-deoxyuridine triphosphate nick-end labeling analyses. The results demonstrated that miR-423-5p was associated with CHF and the expression levels of proBNP; in addition, OGT was found to be a direct target of miR-423-5p. The expression of miR-423-5p significantly regulated the expression of OGT and its associated downstream targets and induced apoptosis in the cardiomyocytes. Therefore, the results of the present study indicated that miR-423-5p was involved in CHF via the dir...Continue Reading

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Apoptosis

Apoptosis is a specific process that leads to programmed cell death through the activation of an evolutionary conserved intracellular pathway leading to pathognomic cellular changes distinct from cellular necrosis