Prospective Study on Plasma MicroRNA-4286 and Incident Acute Coronary Syndrome

Area of Science:

• Biomarkers
• Cardiovascular Disease
• Molecular Biology

Background:

• Circulating microRNAs (miRNAs) are emerging biomarkers for cardiovascular diseases.
• Prospective studies on miRNAs and acute coronary syndrome (ACS) are limited.
• The specific role of miRNAs in ACS pathogenesis requires further investigation.

Purpose of the Study:

• To investigate the association between circulating microRNAs (miRNAs) and incident acute coronary syndrome (ACS).
• To explore the relationship between plasma miR-4286, triglyceride levels, and ACS risk.
• To determine if plasma miR-4286 mediates the effect of triglycerides on incident ACS.

Main Methods:

• A 2-stage prospective nested case-control study within the Dongfeng-Tongji cohort.
• Plasma miRNA profiling using microarray and validation via quantitative real-time polymerase chain reaction.
• Mendelian randomization and causal mediation analyses were employed.

Main Results:

• Plasma miR-4286 was significantly associated with an increased risk of ACS (OR, 1.26).
• Triglyceride levels were positively associated with plasma miR-4286 (11.04% increase per IQR).
• Plasma miR-4286 explained 5.5% of the association between triglycerides and incident ACS.

Conclusions:

• Elevated plasma miR-4286 levels are linked to a higher risk of ACS.
• Higher triglyceride levels contribute to increased plasma miR-4286.
• Plasma miR-4286 may act as a mediator in the pathway from triglycerides to incident ACS.