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• W2977667517 abstract "ABSTRACT Recent trends in cannabis legalization have increased the necessity to better understand the effects of cannabis use. Animal models involving traditional cannabinoid self-administration approaches have been notoriously difficult to establish and differences in the drug employed and its route of administration have limited the translational value of preclinical studies. To address this challenge in the field, we have developed a novel method of cannabis self-administration using response-contingent delivery of vaporized Δ 9 -tetrahydrocannabinol-rich (CAN THC ) or cannabidiol-rich (CAN CBD ) complete cannabis extracts. Male Sprague Dawley rats were trained to nosepoke for discrete puffs of CAN THC , CAN CBD , or vehicle (VEH) in daily one-hour sessions. Cannabis vapor reinforcement resulted in strong discrimination between active and inactive operanda. CAN THC maintained higher response rates under fixed ratio schedules and higher break points under progressive ratio schedules compared to CAN CBD or VEH, and the number of vapor deliveries positively correlated with plasma THC concentrations. Moreover, metabolic phenotyping studies revealed alterations in locomotor activity, energy expenditure, and daily food intake that are consistent with effects in human cannabis users. Furthermore, both cannabis regimens produced ecologically relevant brain concentrations of THC and CBD and CAN THC administration decreased hippocampal CB1 receptor binding. Removal of CAN THC reinforcement (but not CAN CBD ) resulted in a robust extinction burst and an increase in cue-induced cannabis-seeking behavior relative to VEH. These data indicate that volitional exposure to THC-rich cannabis vapor has bona fide reinforcing properties and collectively support the utility of the vapor self-administration model for the preclinical assessment of volitional cannabis intake and cannabis-seeking behaviors." @default.
• W2977667517 created "2019-10-10" @default.
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• W2977667517 date "2019-10-02" @default.
• W2977667517 modified "2023-10-16" @default.
• W2977667517 title "Vaporized cannabis extracts have reinforcing properties and support conditioned drug-seeking behavior in rats" @default.
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• W2977667517 doi "https://doi.org/10.1101/791319" @default.
• W2977667517 hasPublicationYear "2019" @default.
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