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. 1983 May;40(2):733–740. doi: 10.1128/iai.40.2.733-740.1983

Immunomodulation by Blastomyces dermatitidis: functional activity of murine peritoneal macrophages.

L S McDaniel, G C Cozad
PMCID: PMC264917  PMID: 6840859

Abstract

Cell-mediated immunity plays the dominant role in the immune response of mice to Blastomyces dermatitidis infections. Since macrophages play an important role in cell-mediated immunity, the interactions between sensitized murine peritoneal macrophages and the yeast phase of B. dermatitidis were investigated. Scanning electron microscopy showed that the sensitized macrophages readily phagocytized B. dermatitidis yeast cells. In addition, there appeared to be activation of metabolic pathways within the sensitized macrophages, as indicated by increased chemiluminescence activity during phagocytosis. Sensitized macrophages were significantly better at controlling intracellular proliferation of the yeast cells when compared to nonsensitized cells. This was determined by disruption of macrophages and plating for viable yeasts. Scanning electron microscope observations offered further substantiation. Experiments with Candida albicans indicated that B. dermatitidis non-specifically activated macrophages. At 2 h postphagocytosis, 30% fewer C. albicans in B. dermatitidis-activated macrophages were able to form germ tubes. These studies demonstrated the multiple potential of activated macrophages with regard to their functional activity.

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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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