In a new study, researchers found a potential new opioid medication may have the ability to slow the progression of osteoarthritis while being less addictive than commonly prescribed opioid drugs.
The medication activates the kappa opioid receptor (KOR), which binds to opioid-like compounds in the central and peripheral nervous systems to alleviate pain, resulting in targeted pain relief with a reduced risk of addiction.
The research was conducted by Keck Medicine of USC scientists.
Previous research shows that some opioids that selectively activate only KORs relieve pain locally at the site of injury without crossing the blood-brain barrier and inducing substance dependency, whereas commonly prescribed opioids that target other receptors in the brain are more addictive.
In this study, the team locally administered a kappa opioid into arthritic mice’s knees and measured the progression of the disease in their joints.
The researchers confirmed that the medication effectively alleviated pain, however, findings also suggest that the medication prevented the loss of cartilage, the connective tissue between the joins that pads bones, and slowed the progression of osteoarthritis.
The team says arthritis affects nearly a quarter of adults in the United States, many of whom take addictive opioids to manage their pain.
The implications of this study may someday alter how we provide orthopedic care to significantly reduce the number of patients experiencing long-term pain and addiction.
More research is needed to advance toward human clinical trials, which are paramount as treatment and pain management options for osteoarthritis are limited.
They hope that the findings of our study will lay the foundations for clinical research to further current understandings of the relationship between kappa opioids and osteoarthritis in humans to improve clinical care and quality of life.
One author of the study is Alexander Weber, MD, sports medicine physician and orthopedic surgeon with Keck Medicine.
The study is published in Arthritis & Rheumatology.
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