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Lack of evidence for appetitive effects of Delta 9-tetrahydrocannabinol in the intracranial self-stimulation and conditioned place preference procedures in rodents.
Behav Pharmacol. 2007 Jul; 18(4):311-9.BP

Abstract

Data on the ability of Delta 9-tetrahydrocannabinol (THC) to modify reward processes in experimental animals are inconsistent. This study examined the effects of Delta 9-THC on brain reward function using the rate-frequency curve shift paradigm of intracranial self-stimulation (ICSS) and the conditioned place preference (CPP) paradigm. In ICSS tests, rats were implanted with electrodes into the medial forebrain bundle. After brain stimulation reward thresholds stabilized, rats received intraperitoneal injections of Delta 9-THC (0, 0.5, 1 and 2 mg/kg) or the CB1 receptor antagonist SR141716A (0, 0.02 mg/kg) and Delta 9-THC (0, 2 mg/kg). The two highest doses of Delta 9-THC significantly increased the threshold ICSS frequency. SR141716A reversed the action of Delta 9-THC (2 mg/kg), without affecting reward thresholds by itself. In the CPP test, mice received intraperitoneal injections of Delta 9-THC (0, 1 or 3 mg/kg). Delta 9-THC showed neither statistically significant preference nor aversion in either of the doses tested. These findings indicate that Delta 9-THC, in contrast to other drugs of abuse, does not facilitate ICSS or support CPP under the present experimental conditions, but rather has a dose-dependent inhibitory influence on ICSS.

Authors+Show Affiliations

Laboratory of Behavioral Neuroscience, Department of Psychology, School of Social Sciences, University of Crete, Rethymnon, Crete, Greece.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17551324

Citation

Vlachou, Styliani, et al. "Lack of Evidence for Appetitive Effects of Delta 9-tetrahydrocannabinol in the Intracranial Self-stimulation and Conditioned Place Preference Procedures in Rodents." Behavioural Pharmacology, vol. 18, no. 4, 2007, pp. 311-9.
Vlachou S, Nomikos GG, Stephens DN, et al. Lack of evidence for appetitive effects of Delta 9-tetrahydrocannabinol in the intracranial self-stimulation and conditioned place preference procedures in rodents. Behav Pharmacol. 2007;18(4):311-9.
Vlachou, S., Nomikos, G. G., Stephens, D. N., & Panagis, G. (2007). Lack of evidence for appetitive effects of Delta 9-tetrahydrocannabinol in the intracranial self-stimulation and conditioned place preference procedures in rodents. Behavioural Pharmacology, 18(4), 311-9.
Vlachou S, et al. Lack of Evidence for Appetitive Effects of Delta 9-tetrahydrocannabinol in the Intracranial Self-stimulation and Conditioned Place Preference Procedures in Rodents. Behav Pharmacol. 2007;18(4):311-9. PubMed PMID: 17551324.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Lack of evidence for appetitive effects of Delta 9-tetrahydrocannabinol in the intracranial self-stimulation and conditioned place preference procedures in rodents. AU - Vlachou,Styliani, AU - Nomikos,George G, AU - Stephens,David N, AU - Panagis,George, PY - 2007/6/7/pubmed PY - 2007/8/10/medline PY - 2007/6/7/entrez SP - 311 EP - 9 JF - Behavioural pharmacology JO - Behav Pharmacol VL - 18 IS - 4 N2 - Data on the ability of Delta 9-tetrahydrocannabinol (THC) to modify reward processes in experimental animals are inconsistent. This study examined the effects of Delta 9-THC on brain reward function using the rate-frequency curve shift paradigm of intracranial self-stimulation (ICSS) and the conditioned place preference (CPP) paradigm. In ICSS tests, rats were implanted with electrodes into the medial forebrain bundle. After brain stimulation reward thresholds stabilized, rats received intraperitoneal injections of Delta 9-THC (0, 0.5, 1 and 2 mg/kg) or the CB1 receptor antagonist SR141716A (0, 0.02 mg/kg) and Delta 9-THC (0, 2 mg/kg). The two highest doses of Delta 9-THC significantly increased the threshold ICSS frequency. SR141716A reversed the action of Delta 9-THC (2 mg/kg), without affecting reward thresholds by itself. In the CPP test, mice received intraperitoneal injections of Delta 9-THC (0, 1 or 3 mg/kg). Delta 9-THC showed neither statistically significant preference nor aversion in either of the doses tested. These findings indicate that Delta 9-THC, in contrast to other drugs of abuse, does not facilitate ICSS or support CPP under the present experimental conditions, but rather has a dose-dependent inhibitory influence on ICSS. SN - 0955-8810 UR - https://www.unboundmedicine.com/medline/citation/17551324/Lack_of_evidence_for_appetitive_effects_of_Delta_9_tetrahydrocannabinol_in_the_intracranial_self_stimulation_and_conditioned_place_preference_procedures_in_rodents_ L2 - https://doi.org/10.1097/FBP.0b013e3282186cf2 DB - PRIME DP - Unbound Medicine ER -