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Multiple Sclerosis, Vol. 14, No. 8, 1120-1122 (2008) DOI: 10.1177/1352458508092353
EBNA-1 reactivity and HLA DRB1*1501 as statistically independent risk factors for multiple sclerosis: a case-control studyDepartment of Neurology, Umeå University Hospital, Umea, Sweden
Department of Public Health and Clinical Medicine, Epidemiology and Public Health Sciences, Umeå University, Umea, Sweden
Department of Transfusion Medicine, Umeå University Hospital, Umea, Sweden
Department of Public Health and Clinical Medicine, Nutritional Research, Umea University, Umea, Sweden Objectives and methods The interaction between the two best documented risk factors (human leukocyte antigen [HLA] class II [DRB1*1501 positivity] and Epstein-Barr virus [elevated Epstein-Barr nuclear antigen 1 (EBNA-1) antibody reactivity]) for multiple sclerosis (MS) was studied in a case-control study of biobank samples from 109 MS cases and 212 matched referents. Results Multivariate logistic regression analysis showed that both were statistically significant in both sexes. HLA DRB1*1501-positive referents had higher EBNA-1 reactivity than HLA-negative referents. Less EBNA-1 reactivity was required to increase the MS risk in HLA DRB1*1501-positives than in HLA-negatives. Conclusion We suggest that HLA DRB1*1501-positive individuals have an increased vulnerability to EBV-induced autoimmunity.
Key Words: EBNA-1 epstein-barr virus HLA DRB1*1501 multiple sclerosis
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