Cannabidiol regulates behavioural alterations and gene expression changes induced by spontaneous cannabinoid withdrawal.
Br J Pharmacol. 2018 Apr 06;:
Authors: Navarrete F, Aracil-Fernández A, Manzanares J
BACKGROUND AND PURPOSE: Cannabidiol (CBD) represents a promising therapeutic tool for treating cannabis use disorder (CUD). This study aimed to evaluate the effects of CBD on the behavioural and gene expression alterations induced by spontaneous cannabinoid withdrawal.
EXPERIMENTAL APPROACH: Spontaneous cannabinoid withdrawal was evaluated 12 h after cessation of CP-55,940 treatment (0.5 mg·kg-1 /12 h; intraperitoneally (i.p.); 7 days) in C57BL/6J mice. The effects of CBD (5, 10 and 20 mg·kg-1 ; i.p.) on withdrawal-related behavioural signs were evaluated by measuring motor activity, somatic signs and anxiety-like behaviour. Furthermore, gene expression changes of tyrosine hydroxylase (TH) in the ventral tegmental area (VTA), and in the mu-opioid receptor (Oprm1), cannabinoid CB1 receptor (Cnr1) and cannabinoid CB2 receptor (Cnr2) in the nucleus accumbens (NAcc), were also evaluated using the real-time polymerase chain reaction (PCR) technique.
KEY RESULTS: The administration of CBD significantly blocked the increase in motor activity and in the number of rearings, rubbings and jumpings associated with cannabinoid withdrawal and it normalised the decrease in the number of groomings. However, CBD did not change somatic signs in vehicle-treated animals. In addition, the anxiogenic-like effect observed in abstinent mice disappeared with CBD administration, whereas CBD induced an anxiolytic-like effect in non-abstinent animals. Moreover, CBD normalised gene expression changes induced by CP-55,940-mediated spontaneous withdrawal.
CONCLUSION AND IMPLICATIONS: The results suggest that CBD alleviates spontaneous cannabinoid withdrawal and normalises associated gene expression changes. Future studies are needed to determine the relevance of CBD as a potential therapeutic tool for treating CUD.
PMID: 29624642 [PubMed – as supplied by publisher]
Source: Estudios sobre Cannabidiol (CBD)