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Cannabinoids and the digestive tract.

A A Izzo¹, A A Coutts

¹Department of Experimental Pharmacology, University of Naples Federico II, via D Montesano 49, 80131 Naples, Italy.

Handbook of Experimental Pharmacology

|April 7, 2006

Summary

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The endogenous cannabinoid system regulates digestive functions and influences gastrointestinal diseases. Modulating this system offers potential therapeutic strategies for various gut disorders.

Area of Science:

Gastroenterology
Neurogastroenterology
Pharmacology

Background:

Endocannabinoids and their receptors are present in the digestive tract.
CB1 receptors are located on myenteric and submucosal nerve plexuses.
The endocannabinoid system plays a role in digestive physiology and pathophysiology.

Purpose of the Study:

To review the role of the endogenous cannabinoid system in the gastrointestinal tract.
To explore the therapeutic potential of modulating the endocannabinoid system for GI diseases.

Main Methods:

Immunohistochemical studies to locate CB1 receptors.
Pharmacological studies to investigate CB1 receptor activation effects.
Review of existing literature on the endocannabinoid system in the GI tract.

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Main Results:

CB1 receptor activation inhibits lower esophageal sphincter, gastric motility, and acid secretion.
Endocannabinoids stimulate sensory neurons via VR1 receptors, impacting motility and inflammation.
The endocannabinoid system is implicated in colonic motility, paralytic ileus, and inflammatory conditions.
Cannabinoids exhibit antiemetic effects through CB1 receptor activation.

Conclusions:

The endogenous cannabinoid system is a key regulator of gastrointestinal function.
Pharmacological targeting of the endocannabinoid system presents a promising therapeutic avenue for diverse GI conditions.
Potential applications include treatment for nausea, vomiting, ulcers, diarrhea, IBD, and reflux.