Abstract
Interferon-gamma (IFNγ) treatment is deleterious in multiple sclerosis (MS). MS occurs twice as frequently in women as in men. IFNγ expression varies by gender. We studied a population-based sample of US MS patients and ethnicity-matched controls and independent Northern Irish and Belgian hospital-based patients and controls for association with MS, stratified by gender, of an intron 1 microsatellite [I1(761)*CAn], a single nucleotide polymorphism 3′ of IFNG [3′(325)*G → A] and three flanking microsatellite markers spanning a 118 kb region around IFNG. Men carriers of the 3′(325)*A allele have increased susceptibility to MS compared to noncarriers in the USA (P=0.044; OR: 2.58, 95% CI: 0.97–8.08) and Northern Ireland (P=0.019; OR: 2.37, 95% CI: 1.10–5.13). There is a nonsignificant trend in the same direction in Belgian men (P=0.299; OR: 1.50, 95% CI: 0.71–3.26). Men carriers of I1(761)*CA13, which is in strong linkage disequilibrium with the 3′(325)*A, have increased susceptibility (P=0.050; OR: 2.22, 95% CI: 0.98–5.40), while men carriers of I1(761)*CA12 have decreased susceptibility (P=0.022; OR: 0.46, 95% CI: 0.23–0.90) to MS in the USA. Similar associations were reported in Sardinia between the I1(761)*CA12 allele and reduced risk of MS in men. Flanking markers were not associated with MS susceptibility. Polymorphisms of IFNG may contribute to differences in susceptibility to MS between men and women.
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Acknowledgements
The National Institute of Health, grant no. NS45442, and the National MS Society, grant no. 3406-A-6-02, to B Weinshenker, K Vandenbroeck and C Pelfrey have supported this study. The Northern Ireland HPSS R&D Office supported K Vandenbroeck, grant RRG11.5 RSG 1726. A Goris was a research assistant of the Fund for Scientific Research—Flanders (FWO—Flanders). The Mayo Foundation, grant no. DK 43694-01A2, and National Institutes of Health, grant no. MH-56207, supported C McMurray. The University Hospital Research Council, Leuven, Belgium, supported B Dubois.
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Kantarci, O., Goris, A., Hebrink, D. et al. IFNG polymorphisms are associated with gender differences in susceptibility to multiple sclerosis. Genes Immun 6, 153–161 (2005). https://doi.org/10.1038/sj.gene.6364164
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DOI: https://doi.org/10.1038/sj.gene.6364164
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