Study Design: This observational cross-sectional study included fifty persons who were enrolled for coronary angiography due to suspicion of coronary artery disease at Cardiac Catheterization Unit, Department of cardiology, Benha University Hospital from february 2016 until august
ABSTRACTBackground: Atherosclerotic cardiovascular disease is a chronic inflammatory disease and one of the major causes of death worldwide. MicroRNAs are associated with many physiological and pathological situations as inflammation and cardiovascular disease. The communication between microRNAs, inflammation, and atherosclerosis, drive attention to the possibility that inflammation-related microRNAs, miRNA-155, could have a role in atherosclerosis progression.
Objectives:We aimed to determine the levels of circulating miRNA-155 in chronic stable angina patients and to study the impact of microRNA-155 on coronary artery disease severity and extent.
Methods:MicroRNA was extracted and assessed from plasma of 50 subjects (20 normal controls and 30 patients with chronic stable angina) using quantitative reverse-transcription PCR (RT-PCR). Levels were compared in the two groups and correlated with Gensini score in the group with chronic stable angina (CSA).Results: Plasma levels of microRNA 155 were significantly lower in CSA patients (0.59±0.48, 1.94±0.76, in patients and control group respectively (P<0.001).The expression of miR-155 correlated negatively with Gensini scores (P<0.001), total cholesterol (P <0.001), LDL-c (P= 0.002) and triglycerides (P= 0.03).There was a significant difference in miRNA-155 levels among the quartiles of the CSA group (P < 0.001) denoting negative correlation between microRNA 155 and coronary artery disease extent. ROC curve showed that microRNA-155 sensitivity and specificity for the prediction of severity of atherosclerosis were 86.67% and 80% respectively.
Conclusion:Plasma miRNA-155 is significantly lower in CSA angina patients and levels significantly decreases with the progression of atherosclerosis.