alexa Role of IL-10 in invasive aspergillosis: increased resistance of IL-10 gene knockout mice to lethal systemic aspergillosis.
Genetics & Molecular Biology

Genetics & Molecular Biology

Cloning & Transgenesis

Author(s): Clemons KV, Grunig G, Sobel RA, Mirels LF, Rennick DM,

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Abstract IL-10 is associated with a Th2 response, down-regulation of a Th1 response and macrophage activation. We assessed the role of IL-10 during systemic infection with Aspergillus fumigatus. Systemic aspergillosis was established in female C56B1/6 IL-10(-/-) (KO) and wild-type (WT) C57B1/6 mice by i.v. administration of 1 x 10(5)-6 x 10(5) conidia of A. fumigatus. In two experiments, KO survived longer than did WT (P < 0.001). Determination of fungal burdens in the kidneys and brain showed that KO carried significantly lower burdens in both organs than did WT on day 3 (P < 0.001). Semiquantitative histological analyses showed fewer inflammatory foci/mm2 in brain and kidneys of KO than WT (P < 0.03 and < 0.001, respectively) and that extent of infection and associated tissue injury were greater in WT. Although beneficial in some bacterial infections, exogenous IL-10 has been shown deleterious in models of fungal infection. Our data indicate IL-10 is deleterious during systemic aspergillosis infection, increasing the host susceptibility to lethal infection. We speculate this might be related to greater Th2 or lesser Th1 responses, or down-regulation of macrophage responses, in WT compared with KO.
This article was published in Clin Exp Immunol and referenced in Cloning & Transgenesis

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