The Japanese Journal of Pharmacology
Effects of Azelastine on Neutrophil Chemotaxis, Phagocytosis and Oxygen Radical Generation
Hirohiko AkamatsuYoshiki MiyachiYasuo AsadaYukie Niwa
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Volume 57 (1991) Issue 4 Pages 583-589

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The effects of azelastine, an orally active anti-allergic drug, on several inflammatory parameters of human neutrophils, including human neutrophil chemotaxis, phagocytosis and generation of reactive oxygen species (ROS), was examined. ROS generated in a cell-free, xanthine-xanthine oxidase system was also assessed. The species investigated were superoxide radical anion (O2-), hydrogen peroxide (H2O2) and hydroxyl radical (OH·). Azelastine significantly inhibited human neutrophil phagocytosis and the generation of O2-, H2O2, OH· by human neutrophils. However, the drug did not markedly affect human neutrophil chemotaxis or the ROS levels generated in the xanthine-xanthine oxidase system. The present study indicates that azelastine may exert an anti-inflammatory action by inhibiting human neutrophil phagocytosis as well as oxygen radical generation at the sites of inflammation.

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