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  • Title: Regulation by granulocyte-macrophage colony-stimulating factor and/or steroids given in vivo of proinflammatory cytokine and chemokine production by bronchoalveolar macrophages in response to Aspergillus conidia.
    Author: Brummer E, Kamberi M, Stevens DA.
    Journal: J Infect Dis; 2003 Feb 15; 187(4):705-9. PubMed ID: 12599092.
    Abstract:
    Production of the proinflammatory cytokines interleukin (IL)-1 alpha and tumor necrosis factor (TNF)-alpha and of the chemotactic chemokine macrophage inflammatory protein (MIP)-1 alpha by bronchoalveolar macrophages (BAMs) from mice in response to Aspergillus conidia was tested after in vivo administration of saline, dexamethasone, cortisone acetate, granulocyte-macrophage colony-stimulating factor (GM-CSF), or a combination. Dexamethasone suppressed production of IL-1 alpha, TNF-alpha, and MIP-1 alpha; GM-CSF reduced secretion slightly but antagonized dexamethasone suppression when the two were given in combination. Cortisone acetate gave results similar to dexamethasone, but cortisone acetate suppression of BAM responses lasted 7 days, > or = 4 days longer than dexamethasone suppression. The effect of GM-CSF on cortisone acetate suppression lasted at least 7 days. GM-CSF could promote resistance to conidia by maintaining proinflammatory responses.
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