Common Genetic Variation Within MiR-146a Predicts Disease Onset and Relapse in Multiple Sclerosis

Overview

Journal Neurol Sci

Specialty Neurology

Date 2017 Nov 12

PMID 29127522

Citations 15

Authors

Yuan Zhou

Ming Chen

Steve Simpson Jr

Robyn M Lucas

Jac C Charlesworth

Nicholas Blackburn

Ingrid van der Mei

Anne-Louise Ponsonby

Bruce V Taylor

Affiliations

Soon will be listed here.

Abstract

Despite extensive studies focusing on the changes in expression of microRNAs (miRNAs) in multiple sclerosis (MS) compared to healthy controls, few studies have evaluated the association of genetic variants of miRNAs with MS clinical course. We investigated whether a functional polymorphism in the MS associated miR-146a gene predicted clinical course (hazard of conversion to MS and of relapse, and annualized change in disability), using a longitudinal cohort study of persons with a first demyelinating event followed up to their 5-year review. We found the genotype (GC+CC) of rs2910164 predicted relapse compared with the GG genotype (HR=2.09 (95% CI 1.42, 3.06), p=0.0001), as well as a near-significant (p=0.07) association with MS conversion risk. Moreover, we found a significant additive interaction between rs2910164 and baseline anti-EBNA-1 IgG titers predicting risk of conversion to MS (relative excess risk due to interaction [RERI] 2.39, p=0.00002) and of relapse (RERI 1.20, p=0.006). Supporting these results, similar results were seen for the other EBV-correlated variables: anti-EBNA-2 IgG titers and past history of infectious mononucleosis. There was no association of rs2910164 genotype for disability progression. Our findings provide evidence for miR-146a and EBV infection in modulating MS clinical course.

Citing Articles

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