5-Lipoxygenase Deficiency Impairs Innate and Adaptive Immune Responses during Fungal Infection
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
05/11/2013
05/11/2013
2012
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Resumo |
5-lipoxygenase-derived products have been implicated in both the inhibition and promotion of chronic infection. Here, we sought to investigate the roles of endogenous 5-lipoxygenase products and exogenous leukotrienes during Histoplasma capsulatum infection in vivo and in vitro. 5-LO deficiency led to increased lung CFU, decreased nitric oxide production and a deficient primary immune response during active fungal infection. Moreover, H. capsulatum-infected 5-LO-/- mice showed an intense influx of neutrophils and an impaired ability to generate and recruit effector T cells to the lung. The fungal susceptibility of 5-LO-/- mice correlated with a lower rate of macrophage ingestion of IgG-H. capsulatum relative to WT macrophages. Conversely, exogenous LTB4 and LTC4 restored macrophage phagocytosis in 5-LO deficient mice. Our results demonstrate that leukotrienes are required to control chronic fungal infection by amplifying both the innate and adaptive immune response during histoplasmosis. Fundacao de Amparo a Pesquisas do Estado de Sao Paulo (FAPESP, Brazil) Fundacao de Amparo a Pesquisas do Estado de Sao Paulo (FAPESP, Brazil) Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq, Brazil) Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq), Brazil National Institutes of Health (NIH) National Institutes of Health (NIH) [HL-103777 01] |
Identificador |
PLOS ONE, SAN FRANCISCO, v. 7, n. 3, supl. 1, Part 2, pp. 1547-1553, 43891, 2012 1932-6203 http://www.producao.usp.br/handle/BDPI/41640 10.1371/journal.pone.0031701 |
Idioma(s) |
eng |
Publicador |
PUBLIC LIBRARY SCIENCE SAN FRANCISCO |
Relação |
PLOS ONE |
Direitos |
openAccess Copyright PUBLIC LIBRARY SCIENCE |
Palavras-Chave | #ALVEOLAR MACROPHAGE PHAGOCYTOSIS #T-CELL RECRUITMENT #HISTOPLASMA-CAPSULATUM #LEUKOTRIENE B-4 #KLEBSIELLA-PNEUMONIAE #MYCOBACTERIUM-TUBERCULOSIS #FUNGISTATIC ACTIVITY #HUMAN NEUTROPHILS #HOST CONTROL #INFLAMMATION #MULTIDISCIPLINARY SCIENCES |
Tipo |
article original article publishedVersion |