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A causal relationship between leukocyte telomere length and multiple sclerosis: A Mendelian randomization study
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A causal relationship between leukocyte telomere length and multiple sclerosis: A Mendelian randomization study
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A causal relationship between leukocyte telomere length and multiple sclerosis: A Mendelian randomization study
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Journal Article
A causal relationship between leukocyte telomere length and multiple sclerosis: A Mendelian randomization study
2022
Overview
ObjectivesMultiple sclerosis (MS) is a chronic inflammatory autoimmune and degenerative disorder of the central nervous system. Telomeres are protective structures located at the ends of linear chromosomes, and leukocyte telomere length (LTL) is closely connected with cell aging and senescence. However, the relationship between LTL and the risk of MS remains unknown.MethodsWe performed a two-sample Mendelian randomization (MR) to evaluate whether LTL was causally associated with MS risk.ResultsIn our MR analysis, 12 LTL-related variants were selected as valid instrumental variables, and a causal relationship between LTL and MS was suggested. The risk of MS nearly doubled as the genetically predicted LTL shortened by one standard deviation (SD) under the inverse variance weighted (IVW) fixed effect model (odds ratio (OR) = 2.00, 95% confidence interval (CI): 1.52-2.62, p = 6.01e-07). Similar estimated causal effects were also observed under different MR models. The MR–Egger regression test did not reveal any evidence of directional pleiotropy (intercept = -0.005, stand error (SE) = 0.03, p = 0.87). The Mendelian Randomization Pleiotropy RESidual Sum and Outlier (MR-PRESSO) analysis also indicated no directional pleiotropy or outliers for any LTL-related IVs ( p -global test = 0.13). In addition, a leave-one-out sensitivity analysis showed similar findings, which further emphasized the validity and stability of the causal relationship.ConclusionsOur results suggest a potential causal effect of LTL on the risk of MS. Genetically predicted shorter LTL could increase the risk of MS in the European population. LTL should be noted and emphasized in the pathogenesis and treatment of MS.
Publisher
Frontiers Media SA,Frontiers Media S.A
Subject
