Using Extracellular Circulating microRNAs to Classify the Etiological Subtypes of Ischemic Stroke

Area of Science:

• Biochemistry
• Genomics
• Neurology

Background:

• Effective biological classification of ischemic stroke subtypes remains a challenge.
• MicroRNAs (miRNAs) are emerging as key regulators in various biological processes, including neurological diseases.

Purpose of the Study:

• To identify serum microRNA signatures for classifying different ischemic stroke subtypes.
• To investigate the potential of circulating miRNAs as biomarkers for ischemic stroke.

Main Methods:

• Gene array analysis of serum miRNAs in normal controls and patients with cardioembolism (CARD), large artery atherosclerosis (LAA), lacunar infarct (LAC), and stroke of undetermined etiology (SUE).
• Validation of identified miRNAs using an independent cohort and ROC analysis.
• Differential expression analysis of miRNAs pre- and post-stroke.

Main Results:

• Specific serum miRNA signatures were identified for different ischemic stroke subtypes.
• Six miRNAs (miR-125b, miR-125a, let-7b, let-7e, miR-7-2-3p, miR-1908) were validated.
• miR-125b, miR-125a, let-7b, and let-7e differentiated CARD patients, while miR-7-2-3p and miR-1908 were significant for LAA and LAC.
• Circulating miRNAs showed differential expression between pre- and post-stroke states.

Conclusions:

• Circulating miRNAs in serum represent potential novel risk factors in the pathogenesis of ischemic stroke subtypes.
• Identified miRNAs may serve as valuable biomarkers for classifying and potentially managing ischemic stroke.