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Increased prostaglandin E2 levels in the airway of patients with eosinophilic bronchitis

Background:  Eosinophilic bronchitis is a common cause of chronic cough, which like asthma is characterized by sputum eosinophilia, but unlike asthma there is no variable airflow obstruction or airway hyperresponsiveness. We tested the hypothesis that the different airway function in patients with eosinophilic bronchitis and asthma could be caused by an imbalance in the production of bronchoconstrictor (LTC4) and bronchoprotective (prostaglandin E2; PGE2) lipid mediators.