Relevance of Multiple Sclerosis Severity Genotype in Predicting Disease Course: A Real-World Cohort

Area of Science:

• Neuroimmunology
• Genetics
• Neurology

Background:

• Multiple Sclerosis (MS) susceptibility is linked to 233 genetic loci.
• Recent genome-wide association studies identified single-nucleotide variants (SNVs) associated with MS disability outcomes, notably rs10191329A.

Purpose of the Study:

• To evaluate if identified MS progression SNVs correlate with detailed clinical phenotypes in a large MS patient cohort.
• To determine the potential of these genetic markers in influencing individual patient management strategies.

Main Methods:

• Prospective cohort study of 1,455 MS patients.
• Logistic regression, survival analysis, and propensity score matching were employed.
• Association analysis between SNVs and clinical outcomes like disability progression and relapse rates.

Main Results:

• No association was found between rs10191329A and key clinical outcomes, including disability milestones, MS severity score, lesion localization, or relapse rate.
• Replication confirmed associations for two suggestive SNVs (rs7289446G, rs868824C) with fixed disability and HLA-DRB1*1501 with age at onset.
• Propensity score matching analysis also showed no link between rs10191329A and disease severity.

Conclusions:

• While rs10191329A and other SNVs offer insights into MS pathophysiology, they currently lack clinical utility for guiding individual patient management.
• Independent replication of genome-wide association studies is crucial for validating findings related to disease progression in neurodegenerative disorders.