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A Method to Define the Effects of Environmental Enrichment on Colon Microbiome Biodiversity in a Mouse Colon Tumor Model
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The causal relationship between gut microbiota and constipation: a two-sample Mendelian randomization study.

Nan He1,2, Kai Sheng3, Guangzhao Li4

  • 1College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, Sichuan, PR China. keke_nan@sina.com.

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|August 19, 2024
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Summary
This summary is machine-generated.

This study used Mendelian randomization to investigate the causal link between gut bacteria and constipation. Certain bacteria like Anaerotruncus, Butyricimonas, and Hungatella are linked to increased constipation risk, while others may reduce it.

Keywords:
Causal relationshipConstipationGWASGut microbiotaMendelian randomization

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Area of Science:

  • Gastroenterology
  • Microbiome Research
  • Genetics

Background:

  • Constipation is a prevalent gastrointestinal disorder.
  • Observational studies suggest a link between gut microbiota and constipation, but causality is unclear.
  • This study employs Mendelian randomization to explore causal relationships.

Purpose of the Study:

  • To establish a causal link between specific gut microbiota taxa and constipation.
  • To provide insights into the underlying pathology of constipation.
  • To aid in the development of novel prevention and treatment strategies.

Main Methods:

  • A two-sample Mendelian randomization (MR) study design was utilized.
  • Gut microbiota GWAS data from MiBioGen (n=13,266) and constipation GWAS data from IEU OpenGWAS were analyzed.
  • Inverse-variance weighted (IVW) method, alongside MR-Egger, Weighted Median, Simple Mode, and Weighted Mode, were used for primary analysis.
  • Reliability was assessed using funnel plots, heterogeneity tests, and horizontal pleiotropy tests.

Main Results:

  • The study identified a causal association between Anaerotruncus, Butyricimonas, and Hungatella with an increased risk of constipation.
  • Conversely, Ruminiclostridium 9 and Intestinibacter were associated with a reduced risk of constipation.
  • Statistical significance was confirmed with odds ratios and p-values, and MR results demonstrated reliability through validation tests.

Conclusions:

  • This is the first MR study to investigate causal links between specific gut microbiota and constipation.
  • Findings offer valuable insights into the complex pathology of constipation.
  • The results may guide future research for targeted constipation prevention and treatment.