Plasma microRNA profiling reveals loss of endothelial miR-126 and other microRNAs in type 2 diabetes.

Circulation Research
Anna ZampetakiManuel Mayr

Abstract

MicroRNAs (miRNAs) have been implicated in the epigenetic regulation of key metabolic, inflammatory, and antiangiogenic pathways in type 2 diabetes (DM) and may contribute to common disease complications. In this study, we explore plasma miRNA profiles in patients with DM. Total RNA was extracted from plasma samples of the prospective population-based Bruneck study. A total of 13 candidate miRNAs identified by microarray screening and miRNA network inference were quantified by quantitative PCR in all diabetic patients of the Bruneck study and age- and sex-matched controls (1995 evaluation, n=80 each). Quantitative PCR assessment revealed lower plasma levels of miR-20b, miR-21, miR-24, miR-15a, miR-126, miR-191, miR-197, miR-223, miR-320, and miR-486 in prevalent DM, but a modest increase of miR-28-3p. Findings emerged as robust in multivariable analysis and were independent of the standardization procedure applied. For endothelial miR-126, results were confirmed in the entire Bruneck cohort (n=822) in univariate (odds ratio [95% confidence interval], 0.38 [0.26 to 0.55]; P=2.72 × 10(-7)) and multivariate analyses (0.57 [0.37 to 0.86]; P=0.0082). Importantly, reduced miR-15a, miR-29b, miR-126, miR-223, and elevated miR-28-3p lev...Continue Reading

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