Defective Responsiveness to Natural and Pharmacological Molecules of Neutrophil Locomotion in Rheumatoid Arthritis Disease

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Abstract
Neutrophils derived from peripheral blood of patients with rheumatoid arthritis (RA) exhibited a defective responsiveness to natural mediators of inflammation, namely histamine and serotonin, and to the anti-inflammatory drugs ibuprofen and naproxen, in spite of the fact that the basic status of motility was normal. Not even pretreatment of granulocytes with substances restored the capacity to modulate the random and directional locomotion. This neutrophil functional defect was correlated with an anomalous response to rifamycin SV, previously observed in rheumatic states.