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NSAIDs may worsen osteoarthritis knee, reveal MRI study
Osteoarthritis is the most common form of arthritis, affecting more than 500 million people worldwide. It most frequently affects hands, hips and knees. Arthritis is often accompanied by inflammation, or swelling, of the joint, which can be painful for which patients often resort to most available option, consumption of Non-steroidal anti-inflammatory drugs (NSAIDs).
But little is known of the long-term effects of these drugs on disease progression.
Researchers have found in a new study that intake of anti-inflammatory pain relievers like ibuprofen and naproxen for osteoarthritis may worsen inflammation in the knee joint over time.
The new study is being presented next week at the annual meeting of the Radiological Society of North America (RSNA).
"To date, no curative therapy has been approved to cure or reduce the progression of knee osteoarthritis," said the study's lead author, Johanna Luitjens, postdoctoral scholar in the Department of Radiology and Biomedical Imaging at the University of California, San Francisco. "NSAIDs are frequently used to treat pain, but it is still an open discussion of how NSAID use influences outcomes for osteoarthritis patients. In particular, the impact of NSAIDs on synovitis, or the inflammation of the membrane lining the joint, has never been analyzed using MRI-based structural biomarkers."
Dr. Luitjens and colleagues set out to analyze the association between NSAID use and synovitis in patients with osteoarthritis of the knee and to assess how treatment with NSAIDs affects joint structure over time.
"Synovitis mediates development and progression of osteoarthritis and may be a therapeutic target," Dr. Luitjens said. "Therefore, the goal of our study was to analyze whether NSAID treatment influences the development or progression of synovitis and to investigate whether cartilage imaging biomarkers, which reflect changes in osteoarthritis, are impacted by NSAID treatment."
For the study, 277 participants from the Osteoarthritis Initiative cohort with moderate to severe osteoarthritis and sustained NSAID treatment for at least one year between baseline and four-year follow-up were included in the study and compared with a group of 793 control participants who were not treated with NSAIDs. All participants underwent 3T MRI of the knee initially and after four years. Images were scored for biomarkers of inflammation.
Cartilage thickness, composition and other MRI measurements served as noninvasive biomarkers for evaluating arthritis progression.
The results showed no long-term benefit of NSAID use. Joint inflammation and cartilage quality were worse at baseline in the participants taking NSAIDs, compared to the control group, and worsened at four-year follow-up.
"In this large group of participants, we were able to show that there were no protective mechanisms from NSAIDs in reducing inflammation or slowing down progression of osteoarthritis of the knee joint," Dr. Luitjens said. "The use of NSAIDs for their anti-inflammatory function has been frequently propagated in patients with osteoarthritis in recent years and should be revisited, since a positive impact on joint inflammation could not be demonstrated."
According to Dr. Luitjens, there are several possible reasons why NSAID use increases synovitis.
"On the one hand, the anti-inflammatory effect that normally comes from NSAIDs may not effectively prevent synovitis, with progressive degenerative change resulting in worsening of synovitis over time," she said. "On the other hand, patients who have synovitis and are taking pain-relieving medications may be physically more active due to pain relief, which could potentially lead to worsening of synovitis, although we adjusted for physical activity in our model."
Dr. Luitjens noted that prospective, randomized studies should be performed in the future to provide conclusive evidence of the anti-inflammatory impact of NSAIDs.
Reference:
NSAIDs may worsen arthritis inflammation Radiological Society of North America. Meeting 108th Scientific Assembly and Annual Meeting of the Radiological Society of North America
Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751