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• W2419133334 endingPage "579" @default.
• W2419133334 startingPage "565" @default.
• W2419133334 abstract "Abstract Hypoxia-inducible factor (HIF)-1α is a transcription factor that regulates metabolic and immune response genes in the setting of low oxygen tension and inflammation. We investigated the function of HIF-1α in the host response to Histoplasma capsulatum because granulomas induced by this pathogenic fungus develop hypoxic microenvironments during the early adaptive immune response. In this study, we demonstrated that myeloid HIF-1α–deficient mice exhibited elevated fungal burden during the innate immune response (prior to 7 d postinfection) as well as decreased survival in response to a sublethal inoculum of H. capsulatum. The absence of myeloid HIF-1α did not alter immune cell recruitment to the lungs of infected animals but was associated with an elevation of the anti-inflammatory cytokine IL-10. Treatment with mAb to IL-10 restored protective immunity to the mutant mice. Macrophages (Mϕs) constituted most IL-10–producing cells. Deletion of HIF-1α in neutrophils or dendritic cells did not alter fungal burden, thus implicating Mϕs as the pivotal cell in host resistance. HIF-1α was stabilized in Mϕs following infection. Increased activity of the transcription factor CREB in HIF-1α–deficient Mϕs drove IL-10 production in response to H. capsulatum. IL-10 inhibited Mϕ control of fungal growth in response to the activating cytokine IFN-γ. Thus, we identified a critical function for Mϕ HIF-1α in tempering IL-10 production following infection. We established that transcriptional regulation of IL-10 by HIF-1α and CREB is critical for activation of Mϕs by IFN-γ and effective handling of H. capsulatum." @default.
• W2419133334 created "2016-06-24" @default.
• W2419133334 creator A5017801307 @default.
• W2419133334 creator A5018697225 @default.
• W2419133334 creator A5041389380 @default.
• W2419133334 creator A5046764809 @default.
• W2419133334 creator A5065751866 @default.
• W2419133334 date "2016-07-15" @default.
• W2419133334 modified "2023-10-05" @default.
• W2419133334 title "Inverse Correlation between IL-10 and HIF-1α in Macrophages Infected with <i>Histoplasma capsulatum</i>" @default.
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