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Intensive use of corticosteroids may be accompanied by increased susceptibility to infections; hence, we investigated the effects of dexamethasone on the expression of antimicrobial peptides, termed human β-defensins (hBD), by cultured bronchial epithelial cells and mononuclear phagocytes. The results revealed that dexamethasone inhibited the (stimulated) expression of mRNA for hBD-3, but not hBD-1...