Epstein–Barr virus candidate genes and multiple sclerosis

highlights
• Previous infection with EBV and history of IM has been associated with increased MS risk.
• We sought to determine if selected polymorphisms potentially associated with EBV or IM were associated with MS.
• None of the studied polymorphisms appeared to contribute in explaining the association between EBV or IM and MS.

BackgroundPrevious infection with Epstein–Barr virus (EBV) and a history of infectious mononucleosis (IM) have been previously associated with an increased risk of multiple sclerosis (MS). Whether there are common genetic factors that may partially explain these associations has not been thoroughly explored.ObjectiveTo investigate whether select polymorphisms in genes associated with IM susceptibility are related to MS risk—a self-reported history of IM or antibody titer against Epstein–Barr virus nuclear antigen 1 (anti-EBNA1).MethodsA case-control study including 1213 MS cases and 454 controls enrolled in the Accelerated Cure Project for MS (ACP) Repository. Select polymorphisms in HLA-A, SH2D1A and IL15RA and anti-EBNA1 Ab titers were measured using stored blood samples provided by participants. Generalized linear models were used to assess the associations between select polymorphisms and odds of MS, odds of IM or anti-EBNA1 Ab titers.ResultsNo significant associations were observed between the selected polymorphisms and odds of MS, odds of IM or anti-EBNA1 Ab titer.ConclusionIt is unlikely that any of the studied polymorphisms contribute to the explaining the association between anti-EBNA1 Ab titer or history of IM and MS.