Comprehensive analysis of microRNA profiles in multiple sclerosis including next-generation sequencing

Area of Science:

• Biochemistry
• Genetics
• Neuroscience

Background:

• MicroRNAs (miRNAs) are key gene regulators with potential as disease biomarkers.
• Understanding miRNA expression is crucial for diagnosing and understanding neurological disorders.

Purpose of the Study:

• To comprehensively analyze miRNA expression profiles in blood from patients with clinically isolated syndrome (CIS) or relapsing-remitting multiple sclerosis (RRMS).
• To utilize next-generation sequencing (NGS) for in-depth miRNA profiling in multiple sclerosis (MS).

Main Methods:

• Analysis of miRNA expression in whole blood from 25 CIS patients, 25 RRMS patients, and 50 healthy controls.
• Utilized next-generation sequencing (NGS), microarray analysis, and quantitative real-time polymerase chain reaction (qRT-PCR) for miRNA detection.

Main Results:

• NGS and microarray identified 38 and 8 significantly deregulated miRNAs in CIS/RRMS patients, respectively.
• Three miRNAs (hsa-miR-16-2-3p, hsa-miR-20a-5p, hsa-miR-7-1-3p) showed consistent regulation across methods.
• qRT-PCR validated the regulation direction for all eight identified miRNAs.

Conclusions:

• Identified a distinct set of deregulated miRNAs in CIS/RRMS patients.
• Reconfirmed the underexpression of hsa-miR-20a-5p in MS, supporting its role in disease pathophysiology.
• Validated miRNAs show promise as potential biomarkers for MS diagnosis and understanding disease mechanisms.