Abstract:
:Although exogenous cannabinoid ligands such as delta9-tetrahydrocannabinol (THC) have been implicated in reward-related learning and aversion, the hedonic effects of the endogenous cannabinoid agonist anandamide (arachidonylethanolamide) have never been assessed. Thus, the effects of anandamide were tested in a place conditioning task. Male Wistar rats received THC (0.0-8.0 mg/kg) or anandamide (0.0-16.0 mg/kg) during conditioning sessions. The half-life of anandamide was increased by pretreatment with the protease inhibitor phenylmethylsulfonyl fluoride (2.0 mg/kg). A significant place aversion was found at the 1.0 and 1.5 mg/kg doses of THC. No significant place conditioning effects were found with anandamide. Locomotor activity during conditioning was significantly decreased by the 1.0, 1.5, 2.0 and 4.0 mg/kg doses of THC as well as the 8.0 and 16.0 mg/kg doses of anandamide. These results fail to implicate the endogenous cannabinoid anandamide in reward-related learning or aversion.
journal_name
Life Scijournal_title
Life sciencesauthors
Mallet PE,Beninger RJdoi
10.1016/s0024-3205(98)00226-4subject
Has Abstractpub_date
1998-01-01 00:00:00pages
2431-9issue
26eissn
0024-3205issn
1879-0631pii
S0024320598002264journal_volume
62pub_type
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