Open Access Repository

Cannabidiol (CBD) reduces anxiety-related behavior in mice via an FMRP-independent mechanism

Zieba, J, Sinclair, D ORCID: 0000-0001-5961-1007, Sebree, T, Bonn-Miller, M, Gutterman, D, Siegel, S and Karl, T 2019 , 'Cannabidiol (CBD) reduces anxiety-related behavior in mice via an FMRP-independent mechanism' , Pharmacology Biochemistry and Behavior, vol. 181 , pp. 93-100 , doi: 10.1016/j.pbb.2019.05.002.

Full text not available from this repository.


Fragile X Syndrome is a neurodevelopmental disorder which affects intellectual, social and physical development due to mutation of the Fragile X mental retardation 1 (FMR1) gene. The resultant loss of Fragile X mental retardation protein can be modelled by Fmr1 gene knockout (KO) in mice. The current study investigated the behavioural effects of cannabidiol (CBD; a non-psychoactive phytocannabinoid) in male Fmr1 KO mice as a preclinical model for therapeutic discovery. Vehicle or CBD (5 or 20 mg/kg body weight) was administered to adult Fmr1 KO and wild type-like (WT) mice before they were tested in behavioural tasks including: open field (OF), elevated plus maze (EPM), spontaneous alternation, social preference, and passive avoidance tasks. Fmr1 KO mice were hyperlocomotive and hyperexplorative and habituated more slowly to a novel environment compared to control animals. Furthermore, Fmr1 KO mice showed fewer anxiety-related behaviours across tests. Effects of CBD were subtle and limited to the EPM, where CBD decreased the anxiety response of all mice tested. Acute CBD had no impact on locomotion or anxiety-related parameters in the OF. Cognitive performance of Fmr1 KO mice was equivalent to controls and not affected by CBD treatment. Brain concentrations of CBD were equivalent between genotypes, but in animals sacrificed 90 min post-administration, decreased plasma CBD in Fmr1 KO mice compared to WT suggested more rapid clearance of CBD by transgenic animals. Overall, acute CBD at the doses chosen did not selectively normalize behavioural abnormalities in Fmr1 KO mice, but reduced anxiety-like behaviour in both Fmr1 KO and WT mice.

Item Type: Article
Authors/Creators:Zieba, J and Sinclair, D and Sebree, T and Bonn-Miller, M and Gutterman, D and Siegel, S and Karl, T
Keywords: cannabidiol (CBD) Fragile X syndrome, Fmr1, mouse models, locomotion, anxiety, cognition, social behaviours
Journal or Publication Title: Pharmacology Biochemistry and Behavior
Publisher: Pergamon-Elsevier Science Ltd
ISSN: 0091-3057
DOI / ID Number: 10.1016/j.pbb.2019.05.002
Copyright Information:

Copyright 2019 Elsevier Inc.

Related URLs:
Item Statistics: View statistics for this item

Actions (login required)

Item Control Page Item Control Page