Carotid artery stenosis (CAS) is a leading cause of cerebral ischemic events (CIE). Timely detection and risk assessment can aid in managing CAS patients and improving their prognosis. The aim of the current study is to identify a new biomarker for CAS and to further investigate the impact of miR-195-5p on cellular processes in vascular smooth muscle cells (VSMCs).
Methods
This study involved 112 CAS patients and 65 healthy individuals. Serum miR-195-5p levels were measured using RT-qPCR. The ROC curve was then plotted to evaluate the diagnostic potential of miR-195-5p for CAS. The Kaplan–Meier curve and Cox regression were employed to determine miR-195-5p′s prognostic significance. In vitro, the effects of miR-195-5p mimic or inhibitor on VSMC proliferation and migration were assessed using CCK-8 and Transwell assays.
Results
In CAS patients, serum miR-195-5p levels were elevated and correlated with the degree of CAS. The ROC curve had an AUC value of 0.897, with sensitivity of 71.4% and specificity of 95.4%. Higher levels of miR-195-5p indicated a higher risk of CIE occurrence and may serve as an independent predictor of CIE. The upregulation of miR-195-5p promoted VSMC proliferation and migration, while downregulation had the opposite effect.
Conclusions
miR-195-5p was demonstrated to have diagnostic and prognostic significance in CAS and may serve as a potential biomarker. It may contribute to the progression of CAS by promoting the proliferation and migration of VSMCs.
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