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Artículo

Levo-1-methyl tryptophan aggravates the effects of mouse hepatitis virus (MHV-A59) infection

Duhalde Vega, MaiteIcon ; Aparicio, Jose LuisIcon ; Retegui, Lilia AliciaIcon
Fecha de publicación: 02/2015
Editorial: Elsevier Science
Revista: International Immunopharmacology
ISSN: 1567-5769
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otros Tópicos Biológicos

Resumen

Mice infected with mouse hepatitis virus A59 (MHV-A59) develop autoantibodies (autoAb) to liver and kidney fumarylacetoacetate hydrolase (FAH) with a concomitant enhancement of transaminases and release of alarmins such as uric acid and high-mobility group box protein 1 (HMGB1). Tryptophan catabolism is an endogenous mechanism that restricts excessive immune responses, thereby preventing immunopathology. Since indoleamine-2,3-dioxygenase (IDO) is the key and rate-limiting enzyme of tryptophan catabolism, the aim of this work was to explore whether specific inhibition of IDO by Levo-1-methyl tryptophan (MT) could affect MHV actions. Results showed that MT strongly enhanced the hypergammaglobulinemia induced by the virus, as well as anti-MHV Ab and uric acid release. Moreover, infected mice treated with MT did express anti-FAH autoAb and high levels of serum HMGB1. Survival of MHV-infected animals treated with MT was severely reduced compared with that of MHV-infected mice or controls only treated with MT. Furthermore, histological liver examination indicated that MT induced fibrosis in MHV-infected animals, whereas MT itself increased uric acid levels without shortening the animal life Thus, under our experimental conditions, results indicated an exacerbated response to MHV infection when IDO was blocked by MT.
Palabras clave: Hmgb1 , Indoleamine-2,3-Dioxygenase , Levo-1-Methyl Tryptophan , Uric Acid , Mouse Hepatitis Virus
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)
Identificadores
URI: http://hdl.handle.net/11336/17899
URL: http://www.sciencedirect.com/science/article/pii/S1567576914005098?via%3Dihub
DOI: http://dx.doi.org/10.1016/j.intimp.2014.12.031
Colecciones
Articulos(IQUIFIB)
Articulos de INST.DE QUIMICA Y FISICO-QUIMICA BIOLOGICAS "PROF. ALEJANDRO C. PALADINI"
Citación
Duhalde Vega, Maite; Aparicio, Jose Luis; Retegui, Lilia Alicia; Levo-1-methyl tryptophan aggravates the effects of mouse hepatitis virus (MHV-A59) infection; Elsevier Science; International Immunopharmacology; 24; 2; 2-2015; 377-382
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