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A murine model of invasive aspergillosis: variable benefit of interferon-gamma administration under in vitro and in vivo conditions. | LitMetric

AI Article Synopsis

Article Abstract

Background: Interferon-gamma modulates host defense in a number of infectious diseases. Previous studies have shown that systemic administration of interferon-gamma (IFN-gamma) can enhance survival in experimental invasive aspergillosis (IA).

Methods: Using a novel model of murine IA that is characterized by primary pulmonary infection, we investigated the role of IFN-gamma in the phagocytosis and killing of Aspergillus fumigatus by murine neutrophils and pulmonary alveolar macrophages in vitro and the impact of systemic and regional administration of IFN-gamma on the course of IA in glucocorticoid-treated mice.

Results: In vitro, IFN-gamma significantly enhanced phagocytosis and killing function of both neutrophils and alveolar macrophages from normal animals, but not cortisone-treated animals. In vivo, intravenous administration of IFN-gamma did not improve phagocyte recruitment, in vivo killing, or mortality from IA. Regional (intranasal) administration of IFN-gamma to the lungs enhanced recruitment of phagocytic cells to the lungs and improved in vivo killing, but did not alter (and actually worsened) mortality from IA.

Conclusions: The in vitro and in vivo effects of IFN-gamma in IA are contingent on many variables, including the route of administration and the specific pathogenesis of infection.

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Source
http://dx.doi.org/10.1089/sur.2005.6.397DOI Listing

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