DURHAM, NC -- Researchers at Duke University Medical Center used new tools they developed to analyze knees and hips and discovered that osteoarthritic knee joints are in a constant state of repair, while hip joints are not.
"This suggests the knee has capacity for repair we didn't know about and the main treatment strategy probably would need to focus on turning off the breakdown of knee tissue," said Virginia Kraus, M.D., Ph.D., professor of Rheumatology and Immunology at Duke. "I was hugely surprised to find this."
This suggests that knee and hip osteoarthritis may need different treatment approaches, Kraus said.
Perhaps the natural repair response would be sufficient to lead to a reversal or halting of the disease process in the knee if the joint breakdown could be halted, Kraus said.
"At least with the knee you've got an ongoing repair response that we didn't appreciate until now," Kraus said. "If you could capitalize on that and turn off the degradative (breakdown) processing you might have some good effects."
The findings, published in the Journal of Biological Chemistry on Friday, Feb. 10, suggest that for hips, however, turning off the degenerative process might not be enough. The hips would need a treatment to both turn off of the degenerative process as well as stimulate factors that could help to begin repair.
The knee is very accessible for injections, so it would make sense to inject the knee with agents that could turn off the degradative processes, and these could be delivered periodically with close monitoring, Kraus said. "That seems like a very viable strategy."
A number of treatment strategies are being tested in clinical trials to turn off the joint breakdown processes, and Kraus is hopeful that this approach will lead to treatment breakthroughs for osteoarthritis.
A cocktail of drugs might be needed for the hip, however, both to turn off the degradation and to
|Contact: Mary Jane Gore|
Duke University Medical Center