Abstract:
:The endogenous cannabinoid system has been noted for its therapeutic potential, as well as the psychoactivity of cannabinoids such as Δ9-tetrahydrocannabinol (THC). However, less is known about the psychoactivity of anandamide (AEA), an endocannabinoid ligand. Thus, the goals of this study were to establish AEA as a discriminative stimulus in transgenic mice lacking fatty acid amide hydrolase (i.e., FAAH -/- mice unable to rapidly metabolize AEA), evaluate whether THC or oleamide, a fatty acid amide, produced AEA-like responding, and assess for CB(1) mediation of AEA's discriminative stimulus. Mice readily discriminated between 6mg/kg AEA and vehicle in a two-lever drug discrimination task. AEA dose-dependently generalized to itself. THC elicited full AEA-like responding, whereas oleamide failed to substitute. The CB(1) antagonist rimonabant attenuated AEA- and THC-induced AEA-appropriate responding, demonstrating CB(1) mediation of AEA's discriminative stimulus. These findings suggest that, in the absence of FAAH, AEA produces intoxication comparable to THC, and consequently to marijuana.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Walentiny DM,Gamage TF,Warner JA,Nguyen TK,Grainger DB,Wiley JL,Vann REdoi
10.1016/j.ejphar.2011.01.056subject
Has Abstractpub_date
2011-04-10 00:00:00pages
63-7issue
1-3eissn
0014-2999issn
1879-0712pii
S0014-2999(11)00114-2journal_volume
656pub_type
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