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Rheumatoid arthritis (RA) is an autoimmune inflammatory disease that is characterized by increased cardiovascular morbidity and mortality, independent of the traditional risk factors for cardiovascular disease.Although classically known for its role in the regulation of circulatory homeostasis, angiotensin Ⅱ (Ang Ⅱ) is recognized to act as a powerful proinflammatory mediator.Some research showed that Ang Ⅱ played important roles in autoimmune diseases including RA, systemic lupus erythematosus and multiple sclerosis.