Results. In patients with non-ST elevation ACS, who underwent PCI, the expression level of miRNA-27a in serum was higher than in patients without atherosclerotic lesions (6,99±1,69 and 3,05±0,89, respectively; p<0,05). Moreover, patients with multivessel coronary lesions (3 or more arteries) had a higher level of miRNA-27a expression in serum than patients with a single or dual vascular lesion (8,00±2,19 and 5,87±2,64, respectively; p<0,05). In patients with non-ST elevation ACS and patients with a stable CAD, the expression level of miRNA-27a was not significantly different (6,99±1,69 and 8,57±3,90, respectively; p>0,05).
Conclusion.High levels of miRNA-27a expression can be considered as a marker of coronary lesion severity in patients with CAD, but not as a marker for ACS.