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Cannabinoid modulation of intestinal propulsion in mice
G Colombo1, R Agabio, C Lobina
1C.N.R. Center for Neuropharmacology, Cagliari, Italy. colomb@unica.it
European Journal of Pharmacology
|May 7, 1998
Summary
Cannabinoid receptor activation inhibits mouse small intestine motility, while blockade stimulates it. CB1 receptors play a key role in controlling intestinal propulsive activity.
Area of Science:
- Gastroenterology
- Pharmacology
- Neuroscience
Background:
- Cannabinoid receptors are implicated in various physiological processes.
- Their role in gastrointestinal motility requires further elucidation.
Purpose of the Study:
- To investigate the effect of cannabinoid receptor modulation on small intestine propulsive activity in mice.
- To determine the specific role of CB1 receptors in regulating intestinal transit.
Main Methods:
- Assessed small intestine propulsive activity using a non-absorbable oral marker transit assay in mice.
- Administered cannabinoid receptor agonist WIN 55,212-2 and selective CB1 antagonist SR 141716A.
- Evaluated the reversal effect of SR 141716A on WIN 55,212-2-induced changes in transit.
Main Results:
- Cannabinoid receptor agonist WIN 55,212-2 significantly inhibited marker transit.
- Selective CB1 receptor antagonist SR 141716A significantly stimulated marker transit.
- A non-effective dose of SR 141716A reversed the inhibitory effect of WIN 55,212-2 on transit.
Conclusions:
- Cannabinoid CB1 receptors are involved in the regulation of propulsive activity in the mouse small intestine.
- Activation of CB1 receptors reduces intestinal motility, while blockade enhances it.
- These findings highlight the potential of targeting CB1 receptors for modulating gastrointestinal function.