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- W1879202914 abstract "Calu-3 cells, a human lung carcinoma cell line with properties like serous cells of the upper airway, were used to develop an in vitro model for airway antibacterial activity. Calu-3 cell monolayers were cultured on permeable supports at an air-liquid interface. Apical surface fluid (ASF) was collected by washing; antibacterial activity was assayed by incubating ASF washings with bacteria for 18 h and counting surviving colony-forming units. ASF washings killed Escherichia coli and Pseudomonas aeruginosa. Antibacterial activity was salt sensitive and dependent on protein concentration. After washing, approximately 30 h were required before antibacterial activity recovered to its initial level. After culturing with topical corticosteroids (budesonide, triamcinolone, or beclomethasone, 0.1 microg/ml for 48 h), ASF antibacterial activity was 4- to 10-fold greater than the ASF from control monolayers. The increase in antibacterial activity was dose-dependent. The beta(2)-agonists salbutamol and terbutaline (100 microg/ml for 48 h) decreased ASF antibacterial activity by 5- to 8-fold. The nonsteroidal anti-inflammatory agents ibuprofen and cromolyn sodium had no effect. Our results are most consistent with agonist-dependent changes in the composition of ASF antibacterial proteins. We conclude that Calu-3 cells synthesize and secrete antibacterial proteins and that clinical agents can alter these functions." @default.
- W1879202914 created "2016-06-24" @default.
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- W1879202914 date "2001-08-01" @default.
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- W1879202914 title "Antibacterial Activity of Apical Surface Fluid from the Human Airway Cell Line Calu-3" @default.
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- W1879202914 doi "https://doi.org/10.1165/ajrcmb.25.2.4211" @default.
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