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Intestinal myoelectric response in two different models of acute enteric inflammation
R W Sjogren1, C Colleton, T Shea-Donohue
1Division of Medicine, Walter Reed Army Institute of Research, Washington, District of Columbia 20307-5100.
The American Journal of Physiology
|September 1, 1994
Summary
This study compared inflammatory responses to ricin and a hapten in rabbit ileum. Both induced inflammation, but leukotriene D4 (LTD4) mediated the myoelectric response, offering a potential therapeutic target.
Area of Science:
- Gastroenterology
- Immunology
- Pharmacology
Background:
- Intraluminal administration of ricin or 2,4,6-trinitrobenzenesulfonic acid induces intestinal inflammation.
- Understanding the mechanisms of inflammatory responses is crucial for developing targeted therapies.
Purpose of the Study:
- To compare the inflammatory effects of ricin and a hapten in rabbit ileum.
- To investigate the role of leukotriene D4 (LTD4) in mediating the myoelectric response during acute intestinal inflammation.
Main Methods:
- Comparison of inflammatory responses to intraluminal ricin and 2,4,6-trinitrobenzenesulfonic acid in rabbit ileal loops.
- In vivo myoelectric activity recording, histological evaluation, and ex vivo eicosanoid generation (leukotriene C4 and prostaglandin E2).
- Assessment of the effect of LTD4 antagonist Wy-48252 on myoelectric response and tissue morphology.
Main Results:
- Both agents caused significant mucosal damage, polymorphonuclear leukocyte infiltration, and edema.
- Spike burst activity and mucosal leukotriene C4 and prostaglandin E2 generation were significantly enhanced.
- LTD4 antagonist Wy-48252 inhibited the myoelectric response without altering tissue morphology or eicosanoid synthesis.
Conclusions:
- A stereotypic spike burst response occurs during acute intestinal inflammation.
- This myoelectric response is partially mediated by LTD4.
- Targeting LTD4 may offer a therapeutic strategy for managing acute intestinal inflammation.