Title |
Cannabinoid agonists and antagonists modulate lithium-induced conditioned gaping in rats
|
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Published in |
Integrative Psychological and Behavioral Science, April 2003
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DOI | 10.1007/bf02688831 |
Pubmed ID | |
Authors |
Linda A. Parker, Raphael Mechoulam |
Abstract |
Considerable evidence indicates that conditioned gaping in rats reflects nausea in this species that does not vomit. A series of experiments evaluated the potential of psychoactive cannabinoid agonists, delta-9-THC and HU-210, and non-psychoactive cannabinoids, Cannabidiol (CBD) and its dimethylheptyl homolog (CBD-dmh), to interfere with the establishment and the expression of conditioned gaping in rats. All agents attenuated both the establishment and the expression of conditioned gaping. Furthermore, the CB1 antagonist, SR-141716, reversed the suppressive effect of HU-210 on conditioned gaping. Finally, SR-141716 potentiated lithium-induced conditioned gaping, suggesting that the endogenous cannabinoid system plays a role in the control of nausea. |
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