Inflammatory bowel disease and the risk of intracerebral hemorrhage: A Mendelian randomization study and meta‐analysis

Author:

Song Yanju1ORCID,Zou Xuelun2,Zeng Yi3,Zhang Le245,Mao Xinfa1

Affiliation:

1. Department of Neurology Changsha Third Hospital Changsha Hunan China

2. Department of Neurology, Xiangya Hospital Central South University Changsha Hunan P.R. China

3. Department of Geriatrics, Second Xiangya Hospital Central South University Changsha Hunan P.R. China

4. National Clinical Research Center for Geriatric Disorders, Xiangya Hospital Central South University Changsha Hunan P.R. China

5. Multi‐Modal Monitoring Technology for Severe Cerebrovascular Disease of Human Engineering Research Center, Xiangya Hospital Central South University Changsha Hunan P.R. China

Abstract

AbstractBackgroundThe link between inflammatory bowel disease (IBD) and intracerebral hemorrhage (ICH) is still unclear.AimsWe conducted a Mendelian randomization research and meta‐analysis to explore the impact of IBD and its subtypes (Crohn's disease [CD], ulcerative colitis [UC]) on the risk of ICH.MethodsTwo large genome‐wide association analysis studies of International Inflammatory Bowel Disease Genetics Consortium (IIBDGC) and International Stroke Genetics Consortium as exposure (IBD, UC, and CD) and outcome (ICH) in the initial stage. IBD, CD, UC GWAS data from the FinnGen consortium were adopted for the replication phase, and ultimately, the results of the initial stage and replication phase data were combined in a meta‐analysis to evaluate the causal association between IBD and its subtypes and the risk of ICH.ResultsIn the initial stage, we found that in the IVW (odds ratio [OR] = 0.83, 95% confidence interval [CI]: 0.71–0.96, p = .01), MR‐PRESSO (OR = 0.85, 95% CI: 0.75–0.97, p = .02) and MR.RAPS (OR = 0.86, 95% CI: 0.76–0.98, p = .02) method showed that UC is associated with the risk of ICH. The causal relationship between IBD, CD, and the risk of ICH cannot be found by the IVW method. IBD and its subtypes UC, CD, and risk of ICH cannot find the presence of heterogeneity and pleiotropy. In replication stage, IBD (OR = 0.74, 95% CI: 0.59–0.94, p = .0135) related to ICH, while the IVW approach did not establish a causal link in UC and CD. The meta‐analysis still indicated that UC (OR = 0.83, 95% CI: 0.72–0.93, p < .05) would lessen the risk of ICH while the causality between IBD, CD, and ICH was unable to be established.ConclusionUC was causally related to ICH, but IBD and CD are not associated with ICH. The precise pathophysiological mechanism needs to be thoroughly investigated in more detail.

Publisher

Wiley

Subject

Immunology,Immunology and Allergy

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