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The Intestinal Microbiota in the Irritable Bowel Syndrome
1The Farncombe Family Digestive Health Research Centre, The Michael G DeGroote School of Medicine, McMaster University, Hamilton, ON, Canada.
International Review of Neurobiology
|October 30, 2016
Summary
Investigating the gut microbiota
Area of Science:
- Microbiology
- Gastroenterology
- Neuroscience
Background:
- Irritable bowel syndrome (IBS) is a chronic condition with unknown causes.
- The gut microbiota's role in IBS is increasingly recognized, but data are conflicting.
- Microbial changes impact gut function and potentially behavior.
Purpose of the Study:
- To explore the causal link between gut microbiota alterations and IBS symptoms.
- To investigate the gut-brain axis in IBS pathogenesis.
- To establish a model for studying IBS mechanisms and therapeutics.
Main Methods:
- Utilizing molecular-based microbial profiling to analyze gut microbiota composition.
- Perturbing the intestinal microbiota in animal models (antibiotics, diet).
- Colonizing germ-free mice with microbiota from IBS patients.
Main Results:
- Microbiota alterations in IBS patients show conflicting compositional changes.
- Perturbing microbiota in animals mimics IBS-like gut dysfunction.
- Germ-free mice colonized with IBS microbiota develop IBS-like symptoms and behaviors.
- Behavioral changes in mice correlate with donor psychiatric comorbidities like anxiety.
Conclusions:
- Gut microbiota alterations can induce IBS-like symptoms and behaviors.
- The gut-brain axis is significantly influenced by microbial composition in IBS.
- This research provides a model for understanding IBS pathogenesis and developing targeted therapies.
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