ArticleExperimental biology and medicine (Maywood, N.J.)2026
Causal effects of gut microbiota on functional gastrointestinal disorders: a bidirectional Mendelian randomization study.
Article in Experimental biology and medicine (Maywood, N.J.), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Emerging evidence suggests that gut microbiota is associated with functional gastrointestinal disorders (FGIDs). However, findings regarding microbial alterations in FGIDs have been inconsistent across observational studies, and the direction and causality of these associations remain unclear. We conducted a bidirectional two-sample Mendelian randomization (MR) study to investigate potential causal associations between gut microbiota and two common FGIDs, irritable bowel syndrome (IBS) and functional dyspepsia (FD). Genome-wide association study (GWAS) summary statistics of gut microbiota, IBS, and FD were obtained from public databases and applied to our MR analysis. The inverse-variance-weighted method was used as the primary analysis, with weighted median and complementary sensitivity analyses used to assess the consistency and robustness of the findings. Higher genetically predicted abundances of
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