Role of IL-4 in an experimental model of encephalitis induced by intracranial inoculation of herpes simplex virus-1 (HSV-1)



Document title: Role of IL-4 in an experimental model of encephalitis induced by intracranial inoculation of herpes simplex virus-1 (HSV-1)
Journal: Arquivos de neuro-psiquiatria
Database: PERIÓDICA
System number: 000354811
ISSN: 0004-282X
Authors: 1
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Institutions: 1Universidade Federal de Minas Gerais, Instituto de Ciencias Biologicas, Belo Horizonte, Minas Gerais. Brasil
2Centro de Pesquisas Rene Rachou, Belo Horizonte, Minas Gerais. Brasil
Year:
Season: Abr
Volumen: 69
Number: 2A
Pages: 237-241
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental, analítico
English abstract Herpes simplex virus-1 (HSV-1) is a pathogen that may cause severe encephalitis in humans. In this study, we aimed to investigate the role of interleukin-4 (IL-4) in a model of HSV-1 brain infection. IL-4 knockout (IL-4-/-) and wild type (WT) C57BL/6 mice were inoculated with 104 plaque-forming units of HSV-1 by the intracranial route. Histopathologic analysis revealed a distinct profile of infiltrating cells at 3 days post-infection (dpi). Infected WT mice presented mononuclear inflammatory cells while IL-4-/- mice developed meningoencephalitis with predominance of neutrophils. IL-4-/- mice had diminished leukocyte adhesion at 3 dpi when compared to infected WT animals in intravital microscopy study. Conversely no differences were found in cerebral levels of CXCL1, CXCL9, CCL3, CCL5 and TNF-α between WT and IL-4-/- infected mice. IL-4 may play a role in the recruitment of cells into central nervous system in this acute model of severe encephalitis caused by HSV-1
Portuguese abstract O vírus herpes simplex-1 (HSV-1) é um patógeno que pode causar encefalite grave em humanos. Neste estudo, buscamos investigar o papel da interleucina-4 (IL-4) no modelo de infecção intracerebral por HSV-1. Camundongos C57BL/6 selvagens (WT) e deficientes no gene IL-4 (IL-4-/-) foram inoculados com 104 unidades formadoras de placas de HSV-1 por via intracraniana. A análise histopatológica revelou um padrão distinto de infiltrado leucocitário. Camundongos WT infectados apresentaram infiltrado de células mononucleares, enquanto camundongos IL-4-/- desenvolveram meningoencefalite com predomínio de neutrófilos 3 dias pós-infecção (dpi). Animais IL-4-/- tiveram menor adesão de leucócitos 3 dpi quando comparados aos animais WT infectados à microscopia intravital. Em contrapartida, não foram encontradas diferenças nos níveis cerebrais de CXCL1, CXCL9, CCL3, CCL5 e TNF-α entre camundongos WT e IL-4-/- infectados. Esses resultados sugerem que IL-4 pode desempenhar um papel no recrutamento de células no sistema nervoso central neste modelo agudo de encefalite grave causada pelo HSV-1
Disciplines: Medicina
Keyword: Microbiología,
Neurología,
Biología celular,
Herpes simple,
Virus,
Encefalitis,
Modelos experimentales,
Inflammation,
Citocinas,
IL-4
Keyword: Medicine,
Microbiology,
Neurology,
Cell biology,
Herpes simplex,
Virus,
Encephalitis,
Experimental models,
Inflammation,
Cytokines,
IL-4
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