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| Home > In process > Human herpesvirus 7 and the risk of developing multiple sclerosis. |
| Home > In process > Human herpesvirus 7 and the risk of developing multiple sclerosis. |
| Journal Article | DKFZ-2026-00091 |
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2026
Oxford University Press
[Oxford]
Abstract: Epstein-Barr virus is now regarded as the critical risk factor for multiple sclerosis. However, Cytomegalovirus and human herpesvirus 6A have also been associated with altered multiple sclerosis risk, suggesting a multifactorial aetiology. Here, we present the first large-scale study of the association between human herpesvirus 7 and the risk of developing multiple sclerosis. A nested case-control study was performed by crosslinking Swedish registries and biobanks, identifying blood samples from 981 cases who later developed multiple sclerosis and 1278 matched controls. Serological testing was performed with a multiplex immunoassay. The association between viral serostatus and the risk of developing multiple sclerosis was analysed with conditional logistic regression, calculating an odds ratio with 95% confidence interval. Interactions between antibodies against human herpesvirus 7 and the Epstein-Barr virus nuclear antigen 1 regarding multiple sclerosis risk were analysed on the additive scale. Serological evidence of human herpesvirus 7 infection was associated with a higher risk of developing multiple sclerosis: odds ratio = 2.2 (95% confidence interval = 1.8-2.7), P < 0.001. The results remained similar when adjusting for cytomegalovirus, Epstein-Barr virus and human herpesvirus 6A serostatus. Synergistic interactions between human herpesvirus 7 and Epstein-Barr virus nuclear antigen 1 seroreactivity were observed: attributable proportion due to interaction = 0.51 (95% confidence interval = 0.34-0.68). These results suggest that human herpesvirus 7 could be a contributing factor in multiple sclerosis aetiology.
Keyword(s): Epstein–Barr virus ; human herpesvirus 7 ; multiple sclerosis ; risk factors ; serology
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