Related Experiment Video
Updated: Jun 5, 2025
07:32
Murine Fecal Isolation and Microbiota Transplantation
Published on: May 26, 2023
3.9K
The Causal Relationship between Gut Microbiota and Atrial Fibrillation: A Two-Sample Mendelian Randomization Study
Yuan Zhou1, Xuan Wang2, Jiongchao Guo1
1Department of Cardiology, The First People's Hospital of Hefei, The Third Affiliated Hospital of Anhui Medical University, Hefei - China.
Arquivos Brasileiros De Cardiologia
|December 11, 2024
Summary
This study reveals that gut microbiota (GM) causally influences atrial fibrillation (AF) risk. Certain bacteria like Actinobacteria are protective, while others, such as Oxalobacter, increase AF risk.
Area of Science:
- Genetics
- Microbiology
- Cardiology
Background:
- Previous research has characterized gut microbiota (GM) in atrial fibrillation (AF), but causal links remain unclear.
- Understanding the bidirectional relationship between GM and AF is crucial for novel therapeutic strategies.
Purpose of the Study:
- To investigate the causal relationship between gut microbiota and atrial fibrillation using genome-wide association studies (GWAS).
- To identify specific bacterial taxa associated with increased or decreased risk of AF.
Main Methods:
- Employed two-round Mendelian randomization (MR) analysis utilizing single nucleotide polymorphisms (SNPs) as instrumental variables.
- Applied genome-wide and locus-wide significance thresholds for SNP selection.
- Conducted sensitivity analyses to assess heterogeneity and pleiotropy.
Main Results:
- Identified specific GM taxa with significant causal effects on AF risk at both locus-wide and genome-wide significance levels.
- Found protective associations for Actinobacteria, Firmicutes, Bifidobacterium, and others.
- Observed increased AF risk associated with Pasteurellales, Oxalobacter, and Erysipelatoclostridium.
- Sensitivity analyses indicated potential heterogeneity for certain taxa.
Conclusions:
- This study provides robust evidence for a causal role of gut microbiota in atrial fibrillation.
- Demonstrated both beneficial and detrimental impacts of specific GM on AF development.
- Highlights the potential of targeting GM for AF prevention and treatment.
Related Concept Videos
01:23Anatomy of the Intestines
71.3K
Although digestion of proteins, carbohydrates, and lipids may begin in the stomach, it is completed in the intestine. The absorption of nutrients, water, and electrolytes from food and drink also occurs in the intestine. The intestines can be divided into two structurally distinct organs—the small and large intestines.
Small Intestines
The small intestine is an ~7 meter-long tube with an inner diameter of just 2.5 cm. Since most nutrients are absorbed here, the inner lining of the...
Small Intestines
The small intestine is an ~7 meter-long tube with an inner diameter of just 2.5 cm. Since most nutrients are absorbed here, the inner lining of the...
71.3K
01:11Genome-wide Association Studies-GWAS
12.4K
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
12.4K