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Organic solvents and MS susceptibility Interaction with MS risk HLA genes
Stockholm University, Faculty of Science, Department of Mathematics.
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Number of Authors: 62018 (English)In: Neurology, ISSN 0028-3878, E-ISSN 1526-632X, Vol. 91, no 5, p. E455-E462Article in journal (Refereed) Published
Abstract [en]

Objective We hypothesize that different sources of lung irritation may contribute to elicit an immune reaction in the lungs and subsequently lead to multiple sclerosis (MS) in people with a genetic susceptibility to the disease. We aimed to investigate the influence of exposure to organic solvents on MS risk, and a potential interaction between organic solvents and MS risk human leukocyte antigen (HLA) genes. Methods Using a Swedish population-based case-control study (2,042 incident cases of MS and 2,947 controls), participants with different genotypes, smoking habits, and exposures to organic solvents were compared regarding occurrence of MS, by calculating odds ratios with 95% confidence intervals using logistic regression. A potential interaction between exposure to organic solvents and MS risk HLA genes was evaluated by calculating the attributable proportion due to interaction. Results Overall, exposure to organic solvents increased the risk of MS (odds ratio 1.5, 95% confidence interval 1.2-1.8, p = 0.0004). Among both ever and never smokers, an interaction between organic solvents, carriage of HLA-DRB1*15, and absence of HLA-A*02 was observed with regard to MS risk, similar to the previously reported gene-environment interaction involving the same MS risk HLA genes and smoke exposure. Conclusion The mechanism linking both smoking and exposure to organic solvents to MS risk may involve lung inflammation with a proinflammatory profile. Their interaction with MS risk HLA genes argues for an action of these environmental factors on adaptive immunity, perhaps through activation of autoaggressive cells resident in the lungs subsequently attacking the CNS.

Place, publisher, year, edition, pages
2018. Vol. 91, no 5, p. E455-E462
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Neurology
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URN: urn:nbn:se:su:diva-159038DOI: 10.1212/WNL.0000000000005906ISI: 000440911900007PubMedID: 29970406OAI: oai:DiVA.org:su-159038DiVA, id: diva2:1244873
Available from: 2018-09-03 Created: 2018-09-03 Last updated: 2018-09-03Bibliographically approved

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