Variability of methylation profiles of CpG sites in microRNA genes in leukocytes and vascular tissues of patients with atherosclerosis

• Published in: Biochemistry (Moscow) 2017-06, Vol.82 (6), p.698-706
• Main Authors: Kucher, A. N., Nazarenko, M. S., Markov, A. V., Koroleva, I. A., Barbarash, O. L.
• Format: Article
• Language: English
• Subjects: Arteries; Arteriosclerosis; Atherosclerosis; Biochemistry; Biomedical and Life Sciences; Biomedicine; Bioorganic Chemistry; Blood vessels; Cardiovascular diseases; Coronary artery; Coronary Artery Disease - genetics; Coronary Artery Disease - metabolism; Coronary vessels; Coronary Vessels - metabolism; CpG Islands; DNA Methylation; DNA microarrays; Genes; Genetic aspects; Health aspects; Health risk assessment; Health risks; Humans; Leukocytes; Life Sciences; Male; Mammary Arteries - metabolism; Methods; Methylation; Microbiology; MicroRNA; MicroRNAs; MicroRNAs - genetics; MicroRNAs - metabolism; Middle Aged; miRNA; Observations; Patients; Plaque, Atherosclerotic - genetics; Plaque, Atherosclerotic - metabolism; Plaques; Review; Ribonucleic acid; Risk analysis; Risk factors; RNA; RNA sequencing; Saphenous Vein - metabolism; Thorax; Transcription; Veins; Veins & arteries; White blood cells
• ISSN: 0006-2979; 1608-3040
• DOI: 10.1134/S0006297917060062

In this study, we for the first time described the variability of methylation levels of 71 CpG sites in microRNA genes in leukocytes and blood vessels (coronary artery atherosclerotic plaques, intact internal thoracic arteries, and great saphenous veins) in patients with atherosclerosis using the Infinium HumanMethylation27 BeadChip microarray. Most of the analyzed CpG sites were characterized by the low variability, and most of these low-variable sites were hypomethylated in all tissue samples. CpG sites in coronary artery atherosclerotic plaques and leukocytes were similar in their methylation status. The highest variability of CpG methylation levels between different tissues was found for the CpG sites of the MIR10B gene; the methylation levels of these sites in leukocytes and atherosclerotic arteries were lower than in intact blood vessels. We also found that several cardiovascular disease risk factors, as well as medications, might affect methylation levels of CpG sites in microRNAs.