RESUMO
It is known that micro RNAs are an important regulatory element in the pathogenesis of many diseases, including cardiovascular diseases. Different levels of expression of these molecules in various pathologies makes miRNA a potential diagnostic and prognostic biomarker. AIM: Analysis of miRNA expression levels in mononuclear blood cells (MBC) of patients with acute decompensation f chronic heart failure (CHF) of various etiologies and evaluation of the possibility of their use as a biological marker. MATERIALS AND METHODS: 7 male patients with acute decompensation of CHF with a reduced ejection fraction (EF), NYHA functional class II-IV (FC) according to NYHA [mean (M) EF 29.2%, standard deviation (SD) 13.27%] in age 38 to 65 years old [median (Me) 58 years]. In 3 patients, heart failure developed as a result of dilated cardiomyopathy (DCMP), in 4 patients - against the background of post - infarction cardiosclerosis of the ischemic nature [group of patients with coronary heart disease (CHD)]. The control group - 5 age - matched (from 41 to 57 years old, Me 49 years old) healthy male volunteers. A complete transcript analysis of miRNA expression in MNCs was performed for all patients and healthy volunteers. RESULTS: Differentially expressed miRNAs were determined in patients with CHF (regardless of etiology) compared with healthy individuals: miR-182, miR-144, miR-183, miR-486-5p, miR-143 (log2FC >1, FDR p - value.