Key result
Low serum miR-1225-5p is linked to a ~5-fold increase in major cardiovascular events risk after ACS.
Observational (n=99)
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miR-1225-5p is a promising diagnostic biomarker for acute coronary syndrome and demonstrates protective effects against endothelial injury by targeting FAS.
BackgroundAcute coronary syndrome (ACS), a life-threatening cardiovascular emergency, faces challenges in early diagnosis and risk stratification. MicroRNAs (miRNAs) have emerged as key regulators in cardiovascular diseases.ObjectivesTo investigate the diagnostic/predictive significance of miR-1225-5p in ACS and its mechanism of regulating human coronary artery endothelial cells (HCAECs) injury induced by ox-LDL via targeting FAS.MethodsmiR-1225-5p levels in serum were determined by RT-qPCR in 99 ACS patients and controls, with correlation analysis to clinical indicators. HCAECs were used to assess viability, apoptosis, and inflammation/oxidative stress (IL-6, TNF-α, MDA, SOD) via CCK-8, flow cytometry, and ELISA. Target binding between FAS and miR-1225-5p was validated by dual-luciferase reporter and RIP assays, with functional validation experiments.ResultsmiR-1225-5p was significantly downregulated in ACS (P < 0.001), with subtype-specific patterns (UA > NSTEMI > STEMI). ROC analysis showed high diagnostic accuracy (AUC = 0.885 for ACS; 0.790-0.964 for subtypes). miR-1225-5p (HR = 5.409, 95% CI = 1.281-22.837) and Gensini score (HR = 3.524, 95% CI = 1.066-11.646) acted as a predictive factor in ACS, and downregulated miR-1225-5p is linked to MACEs in ACS patients. Overexpression of miR-1225-5p alleviated ox-LDL-induced HCAECs injury (enhanced viability, suppressed apoptosis, reduced inflammation/oxidative stress). FAS acted as a specific target of miR-1225-5p and is negatively associated with miR-1225-5p (r = -0.721). Overexpression of FAS reversed miR-1225-5p-mediated protective effects on HCAECs.ConclusionmiR-1225-5p is a potential diagnostic indicator for ACS and alleviates HCAECs injury by targeting FAS.
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Ju et al. (2026) conducted an observational in Acute Coronary Syndrome (n=99). miR-1225-5p vs. Controls was evaluated on Prediction of MACEs in ACS (HR 5.409, 95% CI 1.281-22.837). Downregulated serum miR-1225-5p demonstrated high diagnostic accuracy for ACS and served as a significant predictor of MACEs.
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