Expression of miR-126 and its potential function in coronary artery disease.

Xiaoyan Wang1, Yajun Lian, Xin Wen, Jing Guo, Zhiping Wang, Sheng Jiang, Yaodong Hu

1. Department of Ultrasound, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi, China.
2. Department of Cardiology, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi, China.
3. Department of Pharmacy, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi, China.

Abstract
Objective:This study aimed to explore the role of miR-126 in coronary artery disease (CAD) patients and the potential gene targets of miR-126 in atherosclerosis.

Methodology:A total of 60 CAD patients and 25 healthy control subjects were recruited in this study. Among the 60 CAD patients, 18 cases were diagnosed of stable angina pectoris (SAP), 20 were diagnosed of unstable angina pectoris (UAP) and 22 were diagnosed of acute myocardial infarction (AMI). Plasma miR-126 levels from both groups of participants were analyzed by real-time quantitative PCR. ELISA was used to measure plasma level of placenta growth factor (PLGF).

Results: The results showed that the miR-126 expression was significantly down-regulated in the circulation of CAD patients compared with control subjects (P<0.01). Plasma PLGF level was significantly upregulated in patients with unstable angina pectoris and acute myocardial infarction (AMI) compared with controls (both P<0.01) the miR-126 expression in AMI was significantly associated with PLGF.

Conclusion:miR-126 may serve as a novel biomarker for CAD.
Keywords:miR-126; PLGF; PCR; coronary artery disease; atherosclerosis.