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Protection from osteoarthritis may lie in our own joints, study suggests

Date:
May 18, 2014
Source:
European Calcified Tissue Society
Summary:
There may be a strong link between osteoarthritis, which causes pain and stiffness in the joints and is the most common form of arthritis, and the endocannabioid system, which is found in the synovial tissue and fluid that surround joints. The endocannabinoid system is composed of cannabinoid receptors (which are more popularly known for managing the body's response to the psychoactive effects of cannabis) and endocannabinoid ligands, research suggests.

A recent study conducted by researchers at the University of Edinburgh is suggesting a strong link between osteoarthritis, which causes pain and stiffness in the joints and is the most common form of arthritis, and the endocannabioid system, which is found in the synovial tissue and fluid that surround joints. The endocannabinoid system is composed of cannabinoid receptors (which are more popularly known for managing the body's response to the psychoactive effects of cannabis) and endocannabinoid ligands. The type 2 cannabinoid receptor (CB2), is proving to be a significant source of defence against this potentially debilitating disease, which can affect all ages and is particularly common among the elderly.

The findings, which offer the eventual promise of new forms of protection, were presented at the 41st European Calcified Tissue Society Congress, held in Prague on May 17 -- 20, 2014, by Professor Stuart Ralston, Arthritis Research UK Professor of Rheumatology at the University of Edinburgh. Prof Ralston described how a study of mice with destabilised knee joints showed that cartilage degeneration, which lies at the heart of osteoarthritis, was up to 40% more severe in mice who were deficient in CB2 receptors, when compared to 'normal' mice, with the figure reaching up to 60% more severe among aged mice that developed spontaneous osteoarthritis and were deficient in CB2 receptors, when compared to their aged 'normal' counterparts.

The study also showed that a synthesised cannabinoid ligand, HU308, significantly inhibited the progression of arthritis in younger mice with normal levels of CB2 and had no effect on those with CB2 receptor deficiency.

Professor Ralston said: "Learning what provides natural protection against osteoarthritis can potentially give us a much greater insight into how we can develop treatments. We know from this study that, in mice, a CB2 receptor deficiency means a much higher likelihood of developing osteoarthritis and that the use of the synthesised cannabinoid, HU308, in normal mice offers additional protection against the disease.

"Our next step, we hope, is to investigate the role of the CB2 pathway in humans with osteoarthritis."


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The above story is based on materials provided by European Calcified Tissue Society. Note: Materials may be edited for content and length.


Cite This Page:

European Calcified Tissue Society. "Protection from osteoarthritis may lie in our own joints, study suggests." ScienceDaily. ScienceDaily, 18 May 2014. <www.sciencedaily.com/releases/2014/05/140518092722.htm>.
European Calcified Tissue Society. (2014, May 18). Protection from osteoarthritis may lie in our own joints, study suggests. ScienceDaily. Retrieved July 30, 2014 from www.sciencedaily.com/releases/2014/05/140518092722.htm
European Calcified Tissue Society. "Protection from osteoarthritis may lie in our own joints, study suggests." ScienceDaily. www.sciencedaily.com/releases/2014/05/140518092722.htm (accessed July 30, 2014).

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