Related Experiment Video
Updated: May 11, 2026

08:14
A Method to Define the Effects of Environmental Enrichment on Colon Microbiome Biodiversity in a Mouse Colon Tumor Model
Published on: February 28, 2018
8.8K
Assessing the relationship between gut microbiota and endometriosis: a bidirectional two-sample mendelian
Chunxiao Dang1, Zhenting Chen2, Yuyan Chai3
1First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, 250355, Shandong, China.
BMC Women'S Health
|February 16, 2024
Summary
This study used Mendelian randomization to explore the gut microbiota
Area of Science:
- Gastroenterology and Gynecology
- Genetics and Epidemiology
Background:
- Observational studies suggest a link between gut microbiota and endometriosis.
- The causal relationship remains unclear.
Purpose of the Study:
- To investigate the causal relationship between 211 gut microbiota taxa and endometriosis using Mendelian randomization.
Main Methods:
- Utilized Mendelian randomization with genetic loci as instrumental variables.
- Employed the Inverse Variance Weighted (IVW) method, supplemented by MR-Egger, weighted median, and mode methods.
- Conducted sensitivity analyses for heterogeneity, pleiotropy, and causality.
Main Results:
- Identified specific gut bacteria (e.g., Prevotellaceae, Anaerotruncus) as risk factors for endometriosis.
- Found certain bacteria (e.g., Melainabacteria) to be protective.
- No significant heterogeneity or pleiotropic effects were detected.
Conclusions:
- Provided evidence for a potential causal link between gut microbiota and endometriosis.
- Suggested an absence of bidirectional causal effects.
- Findings may inform novel prevention and treatment strategies for endometriosis.
Related Concept Videos
Introduction to the Human Microbiota
Microorganisms colonize various regions of the human body, including the mouth, nasal passages, throat, stomach, intestines, urogenital tract, and skin. The total number of microbial cells is estimated to range from 10¹³ to 10¹⁴—comparable to, or exceeding, the number of human somatic cells. This host–microbiome relationship has led to the conceptualization of humans as supraorganisms, wherein microbial communities perform vital roles in development, immunity, and disease...
Gut-Brain Axis
The gut–brain axis is a bidirectional communication system that connects the gastrointestinal tract and the brain. This interaction is mediated through multiple pathways, including the vagus nerve, hormonal signals, immune responses, and chemical messengers produced by gut microbes.Microbial Contributions to Brain FunctionGut microbiota contributes significantly to brain function by producing neuroactive compounds. These include neuroactive compounds that influence neurotransmitters such as...
Microbiota of the Urogenital Tract
The human urogenital system, once thought to be sterile in healthy individuals, is now recognized as a complex microbial habitat. Advancements in molecular sequencing techniques have revealed that even in healthy adults, the kidneys and bladder harbor microbial populations similar to those found in the distal urethra, albeit in much lower abundance. These resident microorganisms, while generally innocuous, can become opportunistic pathogens under conditions that alter the urogenital...

