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Researchers have found a marker in blood that could reveal the risk of developing rheumatoid arthritis (RA) up to 16 years prior to the start of symptoms. A research team from the Kennedy Institute of Rheumatology at Oxford University found that the blood test looks for antibodies that could accurately predict who will develop RA.
Inflammation can cause certain proteins to alter in a process called citrullination. Altered proteins can lead to an immune response, which creates antibodies against itself and causes rheumatoid arthritis. The blood test then spots antibodies for citrullinated proteins in order to diagnose RA. A general test known as CPP is currently used to detect RA.