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- W1908062287 abstract "We studied the pulmonary disposition of theophylline by performing bronchoalveolar lavage on 19 normal, nonsmoking volunteers who had taken theophylline orally for 14 days. In addition, we determined the influence of theophylline on human alveolar macrophage bacterial phagocytosis, intracellular killing, and hydrogen peroxide release. We found a 1:1 relationship between serum and bronchoalveolar lavage theophylline concentrations when lavage fluid concentrations were corrected for saline dilution. We found marked impairment of the bactericidal activity of alveolar macrophages from theophylline-treated subjects (intracellular killing efficiency of 24.7 +/- 1.5% compared with 60.2 +/- 0.9% by macrophages from control subjects; p less than 0.001). This defect in alveolar macrophage bactericidal activity was inversely correlated with the bronchoalveolar lavage theophylline concentrations, and was corrected after the alveolar macrophages were cultured under serum-free conditions for 48 h. Theophylline significantly impaired alveolar macrophage release of hydrogen peroxide. Hence, theophylline may compromise lung host defenses by suppressing alveolar macrophage bactericidal activity and oxidative metabolite release." @default.
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- W1908062287 date "1986-12-01" @default.
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- W1908062287 title "The pulmonary disposition of theophylline and its influence on human alveolar macrophage bactericidal function." @default.
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- W1908062287 doi "https://doi.org/10.1164/arrd.1986.134.6.1225" @default.
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