Postmortem-Derived Exosomal MicroRNA 486-5p as Potential Biomarkers for Ischemic Heart Disease Diagnosis

Area of Science:

• Biochemistry
• Molecular Biology
• Forensic Science

Background:

• Exosomes, nanovesicles from body fluids, carry biological information and show potential as disease biomarkers.
• Limited research exists on using exosomes for postmortem diagnostics.
• This study investigates exosomal microRNAs (miRNAs) in postmortem samples for diagnosing acute myocardial infarction (AMI) and coronary atherosclerosis.

Purpose of the Study:

• To identify exosomal miRNAs in postmortem plasma and pericardial fluid as potential biomarkers for AMI.
• To assess the utility of these miRNAs in diagnosing coronary atherosclerosis progression.
• To explore the application of postmortem exosomal miRNAs in forensic diagnostics.

Main Methods:

• Analysis of exosomal miRNA from postmortem plasma and pericardial fluid samples using next-generation sequencing (NGS).
• Comparison of miRNA expression profiles between a control group (n=13) and an acute myocardial infarction group (n=24).
• Correlation of specific miRNA levels with the severity of atherosclerotic plaques based on American Heart Association criteria.

Main Results:

• Twenty-nine differentially expressed miRNAs were identified between the AMI and control groups.
• Five miRNAs showed more than a twofold increase in expression in the AMI group.
• miR-486-5p levels significantly correlated with high-grade atherosclerotic plaques, indicating its potential as a predictive biomarker.

Conclusions:

• Postmortem-derived exosomal miRNAs are viable biomarkers for diagnosing cardiovascular diseases like AMI.
• miR-486-5p shows promise as a predictive biomarker for coronary atherosclerosis progression.
• These findings have significant implications for advancing forensic diagnostics with novel molecular markers.