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Video Imaging and Spatiotemporal Maps to Analyze Gastrointestinal Motility in Mice
Published on: February 3, 2016
Persistent intestinal neuromuscular dysfunction after acute nematode infection in mice
G Barbara1, B A Vallance, S M Collins
1Intestinal Disease Research Program, McMaster University Medical Centre, Hamilton, Ontario, Canada.
Gastroenterology
|October 10, 1997
Summary
Acute intestinal inflammation from Trichinella spiralis infection in mice causes lasting changes in gut neuromuscular function, even after the infection resolves and the gut lining heals.
Area of Science:
- Gastroenterology
- Immunology
- Neuroscience
Background:
- Post-infectious irritable bowel syndrome (IBS) arises after acute enteric infections but remains poorly understood.
- Lack of animal models hinders research into the mechanisms of post-infectious IBS.
- This study investigates long-term neuromuscular changes following acute intestinal inflammation.
Purpose of the Study:
- To examine alterations in intestinal neuromuscular function during and after recovery from acute Trichinella spiralis infection in mice.
- To establish an animal model for studying post-infectious gastrointestinal dysfunction.
Main Methods:
- Monitoring mucosal inflammation using morphometric scores and myeloperoxidase activity.
- Assessing in vitro longitudinal muscle contractility via pharmacological and electrical stimulation.
- Evaluating changes in enteric neuromuscular function post-infection.
Main Results:
- Acute inflammation significantly reduced villus height and increased crypt depth and myeloperoxidase activity.
- Muscle contractions induced by carbachol and KCl increased threefold.
- Contractions from electrical field stimulation decreased by 60%, indicating impaired excitatory neurotransmission.
- While mucosal inflammation resolved, altered muscle contractility persisted for 42 days, and impaired neurotransmission for 28 days.
Conclusions:
- Transient mucosal inflammation leads to persistent alterations in enteric neuromuscular function.
- These functional changes endure beyond the resolution of infection and mucosal healing.
- The findings provide insights into the pathophysiology of post-infectious gastrointestinal disorders.
