Leishmania Infection Induces Macrophage Vascular Endothelial Growth Factor A Production in an ARNT/HIF-Dependent Manner.
Infect Immun
; 87(11)2019 11.
Article
em En
| MEDLINE
| ID: mdl-31451620
ABSTRACT
Cutaneous leishmaniasis is characterized by vascular remodeling. Following infection with Leishmania parasites, the vascular endothelial growth factor A (VEGF-A)/VEGF receptor 2 (VEGFR-2) signaling pathway mediates lymphangiogenesis, which is critical for lesion resolution. Therefore, we investigated the cellular and molecular mediators involved in VEGF-A/VEGFR-2 signaling using a murine model of infection. We found that macrophages are the predominant cell type expressing VEGF-A during Leishmania major infection. Given that Leishmania parasites activate hypoxia-inducible factor 1α (HIF-1α) and this transcription factor can drive VEGF-A expression, we analyzed the expression of HIF-1α during infection. We showed that macrophages were also the major cell type expressing HIF-1α during infection and that infection-induced VEGF-A production is mediated by ARNT/HIF activation. Furthermore, mice deficient in myeloid ARNT/HIF signaling exhibited larger lesions without differences in parasite numbers. These data show that L. major infection induces macrophage VEGF-A production in an ARNT/HIF-dependent manner and suggest that ARNT/HIF signaling may limit inflammation by promoting VEGF-A production and, thus, lymphangiogenesis during infection.
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Base de dados:
MEDLINE
Assunto principal:
Leishmaniose Cutânea
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Fator A de Crescimento do Endotélio Vascular
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Translocador Nuclear Receptor Aril Hidrocarboneto
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Subunidade alfa do Fator 1 Induzível por Hipóxia
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Macrófagos
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article