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Updated: Jul 10, 2026

DNBS/TNBS Colitis Models: Providing Insights Into Inflammatory Bowel Disease and Effects of Dietary Fat
Published on: February 27, 2014
Verapamil alters eicosanoid synthesis and accelerates healing during experimental colitis in rats
R N Fedorak1, L R Empey, K Walker
1Department of Medicine, University of Alberta, Edmonton, Canada.
Calcium channel blockers like verapamil may treat inflammatory bowel disease by reducing inflammatory leukotrienes and increasing protective prostaglandins, aiding mucosal healing.
Area of Science:
- Gastroenterology
- Pharmacology
- Inflammation Research
Background:
- Prostaglandins protect the gut lining in inflammatory bowel disease (IBD), while leukotrienes promote inflammation.
- Leukotriene synthesis and action are calcium-dependent, unlike prostaglandin pathways.
Purpose of the Study:
- To investigate if calcium channel blockade alters eicosanoid synthesis and promotes healing in IBD models.
- To assess verapamil's effects on mucosal injury, inflammation, and fluid absorption in colitis.
Main Methods:
- Acetic acid-induced colitis model in animals.
- Treatment with verapamil and/or misoprostol.
- Measurement of colonic injury, myeloperoxidase activity, fluid absorption, prostaglandin E2, and leukotriene B4 (LTB4) via rectal dialysis.
Main Results:
- Verapamil significantly improved fluid absorption and reduced ulceration in colitic animals.
- Verapamil decreased LTB4 synthesis by twofold in colitic animals.
- In non-colitic animals, verapamil reduced LTB4 and increased prostaglandin E2 synthesis.
Conclusions:
- Verapamil demonstrates mucosal protection in IBD models by reducing leukotrienes and increasing prostaglandins.
- Differential regulation of arachidonic acid metabolism by calcium channel blockers offers therapeutic potential for IBD.
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