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Joint Pain Forum – News you can use!

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Genetic variant associated with susceptibility to osteoarthritis

Nature Genetics on Apr 02 2007 11:51:04


A variant in a gene called GDF5 is associated with the risk of developing osteoarthritis, a study published online this week in Nature Genetics suggests. Osteoarthritis is the most common form of arthritis, affecting more than 20 million people in the United States.

Osteoarthritis is caused by the breakdown and loss of the cartilage in one or more joints during ageing, leading to swelling, pain, and limited mobility. Shiro Ikegawa and colleagues analyzed variation across the GDF5 gene and found that one particular variant was significantly more frequent in two independent populations of Japanese individuals with osteoarthritis of the hip compared to disease-free individuals.

The same variant was also found to be significantly more frequent in both Japanese and Chinese individuals suffering from osteoarthritis of the knee. Depending on the study, the variant conferred 30%-80% additional risk of developing the disease. The authors showed that this variant probably reduces the amount of GDF5 produced. As GDF5 is a protein that is secreted by cells and is known to be involved in cartilage development, lower levels of GDF5 may affect the maintenance of cartilage in joints

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