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Comparison of the discriminative stimulus properties of Δ9-THC and psilocybin in rats

Isaac Greenberg, D. M. Kuhn, James B. Appel

Pharmacology, Biochemistry, and Behavior September 1, 1975 DOI: 10.1016/0091-3057(75)90131-8 (opens in new tab)

Study at a glance

AI-extracted from the abstract
Characteristics Experimental animal study Peer reviewed
Population Male albino rats
Interventions delta9-THC psilocybin
Dose 1.9 mg/kg of delta9-THC; 1.0 mg/kg of delta9-THC; 1.0 mg/kg of psilocybin
Duration 30 min before experimentation
Topics Psilocybin Cannabis
Keywords Stimulus control Lever Discriminative model Stimulus psychology Pharmacology Hallucinogen Cognitive psychology Artificial intelligence
Citations 17
Key findings Delta9-THC and psilocybin produce discriminably different internal states in rats, as shown by differential lever choice.

Abstract

Male albino rats were trained to respond differentially on the left or right lever in a 2-lever chamber on the basis of which drug had been given intra-peritoneally (IP) 30 min before experimentation. In 1 group 1.9 mg/kg of delta9-THC and control injections (vehicle) served as the discriminative stimuli associated with each lever and in another group the drug stimuli were 1.0 mg/kg of delta9-THC and 1.0 mg/kg of psilocybin. The results confirmed those of other experiments using different procedures; that delta9-THC can acquire discriminative control over responding. The fact that delta9-THC and psilocybin were also found to differentially control lever choice demonstrates that these 2 drugs probably produce discriminably different states in rats.

Comparable studies

Other preclinical and animal studies on cannabis, most cited first.

Study Year Design Participants
Cognitive Impairment Induced by Delta9-tetrahydrocannabinol Occurs through Heteromers between Cannabinoid CB1 and Serotonin 5-HT2A Receptors Mice 2015 Preclinical study
Interaction of drugs of abuse and maintenance treatments with human P-glycoprotein (ABCB1) and breast cancer resistance protein (ABCG2). hMDR1- and hBCRP-transfected HEK293 cells and hMDR1- and hBCRP-MDCKII cells 2010 In vitro study
Long-term hippocampal interneuronopathy drives sex-dimorphic spatial memory impairment induced by prenatal THC exposure Mice prenatally exposed to THC, including conditional CB1R knockout mice 2020 Animal experimental study
Chronic cannabis promotes pro-hallucinogenic signaling of 5-HT2A receptors through Akt/mTOR pathway Mice exposed to chronic THC early in life 2018 Animal experimental study
Effects of cannabinoid drugs on the deficit of prepulse inhibition of startle in an animal model of schizophrenia: the SHR strain Spontaneously hypertensive rats (SHRs) and Wistar rats 2014 Animal experimental study

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