Arthritis is a common chronic disease in which joints become inflamed, leading to stiffness and pain that can often be debilitating. Rheumatoid arthritis (RA) is an autoimmune form of the disease, arising when immune cells attack the tissue that lines the joints. There is a need for new treatment options, as current therapies only alleviate symptoms or, at best, slow the disease. Now, in a study published in Nature Immunology, researchers at Osaka University have discovered a previously unknown type of RA-causing cell within arthritic joints that could someday be a target for new treatments.
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