• 1. The Second Clinical College of Beijing University of Chinese Medicine, Beijing 100029, P. R. China;
  • 2. Respiratory Fever Department, Dongfang Hospital of Beijing University of Chinese Medicine, Beijing 100078, P. R. China;
MA Jianling, Email: ponymjl@sina.com
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Objective  To evaluate the potential causal relationship between asthma and the risk of gastroesophageal reflux disease (GERD) using a two-sample Mendelian randomization study. Methods  A large sample of genome-wide association study was used to summarize the data, and the genetic loci [single nucleotide polymorphisms (SNPs)] closely related to asthma were selected as instrumental variables, and Mendelian randomization analysis was conducted by inverse variance weighting, weighted median and MR-Egger method, respectively. At the same time, the multi-effect of MR-Egger was detected and the sensitivity analysis was carried out by Leave-one-out method to ensure the robustness of the results. Results  A total of 77 SNPs closely related to asthma were selected as instrumental variables. The results of inverse variance weighted analysis showed a significant positive correlation between asthma and the occurrence of gastroesophageal reflux disease [odds ratio (OR)=1.044, 95% confidence interval (CI) (1.006, 1.083), P=0.024]. Weighted median results showed similar causality [OR=1.075, 95%CI (1.021, 1.133), P=0.006]. The MR-Egger regression results showed that there was a positive correlation between asthma and GERD, but there was no statistical significance [OR=1.080, 95%CI (0.983, 1.187), P=0.115]. The heterogeneity test results showed that there was no heterogeneity in the causal relationship between asthma and GERD (P>0.05). The results of the horizontal pleiotropy test showed that there was no horizontal pleiotropy in SNPs (P>0.05). The results of the retention test showed that no SNPs with significant impact on the results were detected. Conclusion  There is a positive causal relationship between asthma and GERD.

Citation: LIU Song, MA Jianling, SHI Liqing, LUO Jingshu, GUO Zhaodi. Causal relationship between asthma and gastroesophageal reflux disease based on two-sample Mendelian randomization. West China Medical Journal, 2024, 39(4): 546-552. doi: 10.7507/1002-0179.202311128 Copy

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