MyD88 controls human metapneumovirus-induced pulmonary immune responses and disease pathogenesis.
Virus Res
; 176(1-2): 241-50, 2013 Sep.
Article
en En
| MEDLINE
| ID: mdl-23845303
ABSTRACT
Human metapneumovirus (hMPV) is a common cause of lung and airway infections in infants and young children. Recently, we and others have shown that hMPV infection induces Toll-like receptor (TLR)-dependent cellular signaling. However, the contribution of TLR-mediated signaling in host defenses against pulmonary hMPV infection and associated disease pathogenesis has not been elucidated. In this study, mice deficient in MyD88, a common adaptor of TLRs, was used to investigate the contribution of TLRs to in vivo pulmonary response to hMPV infection. MyD88(-/-) mice have significantly reduced pulmonary inflammation and associated disease compared with wild-type (WT) C57BL/6 mice after intranasal infection with hMPV. hMPV-induced cytokines and chemokines in bronchoalveolar lavage fluid (BALF) and isolated lung conventional dendritic cells (cDC) are also significantly impaired by MyD88 deletion. In addition, we found that MyD88 is required for the recruitment of DC, T cells, and other immune cells to the lungs, and for the functional regulation of DC and T cells in response to hMPV infection. Taken together, our data indicate that MyD88-mediated pathways are essential for the pulmonary immune and pathogenic responses to this viral pathogen.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Infecciones por Paramyxoviridae
/
Metapneumovirus
/
Factor 88 de Diferenciación Mieloide
/
Interacciones Huésped-Patógeno
/
Pulmón
Tipo de estudio:
Etiology_studies
/
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
Virus Res
Asunto de la revista:
VIROLOGIA
Año:
2013
Tipo del documento:
Article
País de afiliación:
Estados Unidos