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  • Title: Interleukin 7 receptor T244I polymorphism and the multiple sclerosis susceptibility: a meta-analysis.
    Author: Sahami-Fard MH, Mozhdeh M, Izadpanah F, Kashani HH, Nezhadi A.
    Journal: J Neuroimmunol; 2020 Apr 15; 341():577166. PubMed ID: 32062178.
    Abstract:
    BACKGROUND: Multiple sclerosis (MS) is recognized as the most prevalent chronic inflammatory neurological disorder diagnosed in young adults. Recent evidence suggests that the T244I polymorphism of the IL7Rα gene (rs6897932) May influence MS susceptibility; however, individual studies have provided conflicting and controversial results. Therefore, this meta-analysis was conducted to assess the association between the IL7R T244I polymorphism and the risk of MS. METHOD: An extensive search for published literature up to May 2019 was accomplished in the electronic databases, and 28 studies consisting of 16,260 MS patients and 18,335 controls were included. The pooled odds ratio (OR) with 95% confidence interval (CI) was calculated to investigate the strength of association. RESULTS: The results of the present meta-analysis represented significant association between the IL7R T244I polymorphism and MS susceptibility. (recessive model: OR = 1.126, 95% CI 1.026-1.236, P = .012; dominant model: OR = 1.172, 95% CI 1.024-1.341, P = .021; homozygous model: OR = 1.213, 95% CI 1.038-1.417, P = .015; and allelic model: OR = 1.109, 95% CI 1.025-1.200, P = .010, respectively). In the subgroup analysis according to region, our findings showed significant association in Europe. However, no association was found in Middle East. CONCLUSION: The current meta-analysis demonstrated that the C allele of IL7R T244I polymorphism might be a risk factor for the MS susceptibility in Europe but not in Middle East.
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