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. 1982 Dec;38(3):1033–1036. doi: 10.1128/iai.38.3.1033-1036.1982

Chronic glucocorticosteroid therapy impairs staphylococcal clearance from murine lungs.

K M Nugent, E L Pesanti
PMCID: PMC347853  PMID: 7152661

Abstract

Since the clearance of Staphylococcus aureus from murine lungs after aerosol exposure depends only on regional defense processes and does not require the recruitment of neutrophils or other systemic factors, we used this model for pulmonary clearance to evaluate the effect of chronic glucocorticosteroid therapy on intrinsic pulmonary defense responses. Mice treated with oral prednisolone for 2 or more weeks had delayed clearance of S. aureus at both 6 and 22 h after aerosol exposure. Mice treated with prednisolone for 1 week had delayed clearance at 22h, and mice treated for 2 days had normal clearance. In mice that had been treated for 2 weeks, clearance returned to normal after 2 weeks off therapy, but not after 1 week. Prednisolone did not appear to alter the number of phagocytes in bronchoalveolar spaces or their ingestion capacity. These results suggest that chronic steroid therapy can alter pulmonary clearance functions independent of any effect on immune or inflammatory responses.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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