Key result
Acute STEMI was associated with altered expression of six microRNAs compared to healthy individuals, with miR-26b-5p showing a consistent association with platelet function (Spearman's rho 0.27-0.41).
Why the study?
Reduced effect of antiplatelet therapy has been reported in STEMI patients, and microRNAs may influence platelet function, maturity, and antiplatelet response.
Does microRNA expression correlate with platelet function and maturity in patients with acute STEMI?
Observational (n=111)
Does microRNA expression correlate with platelet function and maturity in patients with acute STEMI?
Effect estimate: Spearman's rho 0.27 to 0.41
p-value: p=<0.05
Specific microRNAs, particularly miR-26b-5p, are differentially expressed in acute STEMI and correlate with platelet function, suggesting a potential mechanism for variable antiplatelet therapy efficacy.
miR-26b-5p may relate to platelet reactivity in STEMI; leaves open any role in guiding antiplatelet therapy.
Background Reduced effect of antiplatelet therapy has been reported in patients with ST-segment elevation myocardial infarction (STEMI). MicroRNAs (miRs) may influence platelet function and maturity, and subsequently the effect of antiplatelet therapy. Objectives We aimed to explore the association between miR expression and platelet function and maturity in patients with acute STEMI and healthy individuals. Methods We performed an observational study of STEMI patients admitted directly to primary percutaneous coronary intervention. Patients were treated with antiplatelet therapy according to guidelines. Within 24 hours after admission, blood samples were obtained to measure: the expression of 10 candidate miRs, platelet function markers using advanced flow cytometry, platelet aggregation, serum thromboxane B2, and platelet maturity markers. Furthermore, blood samples from healthy individuals were obtained to determine the normal variation. Results In total, 61 STEMI patients and 50 healthy individuals were included. STEMI patients had higher expression of miR-21–5p, miR-26b-5p, and miR-223–3p and lower expression of miR-150–5p, miR423–5p, and miR-1180–3p than healthy individuals. In STEMI patients, the expression of miR-26b-5p showed the most consistent association with platelet function (all p-values <0.05, Spearman's rho ranging from 0.27 to 0.41), while the expression of miR-150–5p and miR-223–3p showed negative associations with platelet function. No association between miR expression and platelet maturity markers was observed. Conclusion In patients with STEMI, the expression of six miRs was significantly different from healthy individuals. The expression of miR-26b-5p may affect platelet function in acute STEMI patients and potentially influence the effect of antiplatelet therapy.
No takes yet. Share an insight, caveat, or question.
Pedersen et al. (2023) conducted an observational in ST-segment elevation myocardial infarction (STEMI) (n=111). ST-segment elevation myocardial infarction (STEMI) vs. Healthy individuals was evaluated on Expression of 10 candidate miRs and association with platelet function and maturity (Spearman's rho 0.27 to 0.41, p=<0.05). Acute STEMI was associated with altered expression of six microRNAs compared to healthy individuals, with miR-26b-5p showing a consistent association with platelet function (Spearman's rho 0.27-0.41).
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: