Inflammatory bowel disease and allergic diseases: A Mendelian randomization study

孟德尔随机化 医学 炎症性肠病 哮喘 溃疡性结肠炎 疾病 花粉热 免疫学 内科学 胃肠病学 基因型 遗传变异 基因 生物化学 化学
作者
Jiawei Li,Lijun Wang,Yuqi Ma,Yuan Liu
出处
期刊:Pediatric Allergy and Immunology [Wiley]
卷期号:35 (5) 被引量:2
标识
DOI:10.1111/pai.14147
摘要

Abstract Background Inflammatory bowel disease (IBD) and allergic diseases possess similar genetic backgrounds and pathogenesis. Observational studies have shown a correlation, but the exact direction of cause and effect remains unclear. The aim of this Mendelian randomization (MR) study is to assess bidirectional causality between inflammatory bowel disease and allergic diseases. Method We comprehensively analyzed the causal relationship between inflammatory bowel disease (IBD), Crohn's disease (CD), ulcerative colitis (UC) and allergic disease (asthma, Hay fever, and eczema) as a whole, allergic conjunctivitis (AC), atopic dermatitis (AD), allergic asthma (AAS), and allergic rhinitis (AR) by performing a bidirectional Mendelian randomization study using summary‐level data from genome‐wide association studies. The analysis results mainly came from the random‐effects model of inverse variance weighted (IVW‐RE). In addition, multivariate Mendelian randomization (MVMR) analysis was conducted to adjust the effect of body mass index (BMI) on the instrumental variables. Results The IVW‐RE method revealed that IBD genetically increased the risk of allergic disease as a whole (OR = 1.03, 95% CI = 1.01–1.04, fdr. p = .015), AC (OR = 1.04, 95% CI = 1.01–1.06, fdr. p = .011), and AD (OR = 1.06, 95% CI = 1.02–1.09, fdr. p = .004). Subgroup analysis further confirmed that CD increased the risk of allergic disease as a whole (OR = 1.02, 95% CI = 1.00–1.03, fdr. p = .031), AC (OR = 1.03, 95% CI = 1.01–1.05, fdr. p = .012), AD (OR = 1.06, 95% CI = 1.02–1.09, fdr. p = 2E−05), AAS (OR = 1.05, 95% CI = 1.02–1.08, fdr. p = .002) and AR (OR = 1.03, 95% CI = 1.00–1.07, fdr. p = .025), UC increased the risk of AAS (OR = 1.02, 95% CI = 0.98–1.07, fdr. p = .038). MVMR results showed that after taking BMI as secondary exposure, the causal effects of IBD on AC, IBD on AD, CD on allergic disease as a whole, CD on AC, CD on AD, CD on AAS, and CD on AR were still statistically significant. No significant association was observed in the reverse MR analysis. Conclusion This Mendelian randomized study demonstrated that IBD is a risk factor for allergic diseases, which is largely attributed to its subtype CD increasing the risk of AC, AD, ASS, and AR. Further investigations are needed to explore the causal relationship between allergic diseases and IBD.
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