The levels of miRNA-155 (0.49 ± 0.08 <i>vs.</i> 0.23 ± 0.09) and IFN-γ (227.58 ± 26.01 <i>vs.</i> 141.23 ± 17.89) in the UAP group were significantly higher than that of the control group, the difference was statistically significant.
The upregulation of miR-155 expression was positively correlated with the percentage of Th1 cells and interferon-gamma (IFN-γ) levels in patients with UA.
The level of miR-155 in peripheral blood mononuclear cells or plasma was lower in patients with unstable angina pectoris and acute myocardial infarction than in patients with chest pain syndrome, whereas no statistically significant differences were observed between patients with stable angina pectoris and chest pain syndrome.