Cited by 54Osteoarthritis Treatment and MechanismsCannabis and Cannabinoid ResearchBone and Joint Diseases

The type 2 cannabinoid receptor regulates susceptibility to osteoarthritis in mice

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Sophocleous, A., Börjesson, A.E., Salter, D.M., Ralston, S.H.·2015·Osteoarthritis and Cartilage

Abstract

Objective Cannabinoid receptors and their ligands have been implicated in the regulation of various physiological processes but their role in osteoarthritis has not been investigated. The aim of this study was to evaluate the role of the type 2 cannabinoid receptor (Cnr2) in regulating susceptibility to osteoarthritis in mice.Methods We analysed the severity of knee osteoarthritis as assessed by the Osteoarthritis Research Society International (OARSI) scoring system in mice with targeted deletion of Cnr2 (Cnr2(-/-)) and wild type (WT) littermates. Studies were conducted in mice subjected to surgical destabilisation of the medial meniscus (DMM) and in those with spontaneous age-related osteoarthritis (OA).Results Osteoarthritis was more severe following DMM in the medial compartment of the knee in Cnr2(-/-) compared with WT mice (mean ± sem score = 4.9 ± 0.5 vs 3.6 ± 0.3; P = 0.017). Treatment of WT mice with the CB2-selective agonist HU308 following DMM reduced the severity of OA in the whole joint (HU308 = 8.4 ± 0.2 vs vehicle = 10.4 ± 0.6; P = 0.007). Spontaneous age related osteoarthritis was also more severe in the medial compartment of the knee in 12-month old Cnr2(-/-) mice compared with WT (5.6 ± 0.5 vs 3.5 ± 0.3, P = 0.008). Cultured articular chondrocytes from Cnr2(-/-) mice produced less proteoglycans in vitro than wild type chondrocytes.Conclusion These studies demonstrate that the Cnr2 pathway plays a role in the pathophysiology of osteoarthritis in mice and shows that pharmacological activation of CB2 has a protective effect. Further studies of the role of cannabinoid receptors in the pathogenesis of osteoarthritis in man are warranted.

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  1. Review Manager (RevMan) [Computer Program]. Version 5.3. Copenhagen: The Nordic Cochrane Centre, The Cochrane Collaboration; 2014.

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Authors
Sophocleous, A., Börjesson, A. E., Salter, D. M., & Ralston, S. H.
Affiliations
  • Western General Hospital (GB)
  • Institute of Genetics and Cancer (GB)
Corresponding author
  • Sophocleous, A.
  • Börjesson, A.E.
  • Salter, D.M.
  • Ralston, S.H.
Venue
Osteoarthritis and Cartilage
Publisher
Elsevier BV
Published
2015-09
Volume
23
Issue
9
Pages
1586-1594
ISSN
1063-4584 (ISSN-L)
OpenAlex
W2066638828
Cited by
54
References
34
Citations by year
2026: 1 · 2025: 8 · 2024: 1 · 2023: 4 · 2022: 8 · 2021: 7 · 2020: 7 · 2019: 8 · 2018: 4 · 2017: 2 · 2016: 3
FWCI
2.52
Type
journal article
Language
en
Open access
Locations
  • Osteoarthritis and Cartilage (publishedVersion)
  • PubMed (publishedVersion)
  • Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, cc-by-nc-nd)
Funders
Versus Arthritis (17713)
Topics
  • Health Sciences › Medicine › Rheumatology › Osteoarthritis Treatment and Mechanisms
  • Health Sciences › Medicine › Pharmacology › Cannabis and Cannabinoid Research
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Bone and Joint Diseases
Keywords
CB2 receptor, osteoarthritis, knee osteoarthritis, age-related osteoarthritis, HU-308, CB2 receptor agonist, articular chondrocytes, proteoglycan synthesis, chondrocyte hypertrophy, cannabinoid receptors
MeSH terms
Aging, Animals, Cannabinoids, Disease Susceptibility, Menisci, Tibial, Osteoarthritis, Proteoglycans, Chondrocytes, Osteoarthritis, Knee, Receptor, Cannabinoid, CB2, Mice, X-Ray Microtomography

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