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Could Aneurysm and Atherosclerosis-Associated MicroRNAs ( miR 24-1-5p, miR 34a-5p, miR 126-5p, miR 143-5p, miR 145-5p ) Also Be Associated with Coronary Artery Ectasia?

Background: Coronary artery ectasia (CAE), known for localized or diffuse excessive dilatation of the coronary artery, has an unknown etiology, but it has been reported that the underlying cause may be atherosclerosis and genetic changes that may affect the arterial lumen. MicroRNAs have been shown to have an effect in aneurysm diseases and are known to contribute to vascular development and atherosclerosis. The purpose of this study was to investigate whether they are also associated with CAE. Methods: This cross-sectional study consisted of 25 patients with CAE and 25 subjects with normal coronary arteries. Blood was collected and miRNA expression was detected using the Rotor-GeneQ real-time polymerase chain reaction cycler (Qiagen) to investigate expression levels of miR-24-1-5p, miR-34a-5p, miR-126-5p, miR-143-5p, and miR-145-5p. Results: Demographic variables of CAE (mean age 59.5 ± 1.7; 12 women) and controls (mean age 57.2 ± 2.1; 16 women) were similar. miR-126-5p ( p  = 0.014) and miR-145-5p ( p  = 0.003) levels were found to be <2-fold upregulated in CAE compared to controls; miR-143-5p also showed upregulation, but it was not significant ( p  = 0.078). Conversely, miR-24-1-5p ( p  = 0.032) levels were downregulated in CAE compared to controls. miR-34a-5p was also downregulated, but this was not considered significant ( p  = 0.185). Conclusions: According to our study findings, miR-126-5p, miR-145-5p , and miR-24-1-5p may be associated with CAE. These microRNAs could be of diagnostic and therapeutic significance for further studies of CAE involving abnormal angiogenesis and vascular disorders and potentially serve as useful biomarkers.

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