IL-22-binding protein exacerbates influenza, bacterial super-infection.
Mucosal Immunol
; 12(5): 1231-1243, 2019 09.
Article
en En
| MEDLINE
| ID: mdl-31296910
ABSTRACT
Secondary bacterial pneumonia is a significant complication of severe influenza infection and Staphylococcus aureus and Streptococcus pneumoniae are the primary pathogens of interest. IL-22 promotes S. aureus and S. pneumoniae host defense in the lung through epithelial integrity and induction of antimicrobial peptides and is inhibited by the soluble decoy receptor IL-22-binding protein (IL-22BP). Little is known about the effect of the IL-22/IL-22BP regulatory pathway on lung infection, and it has not been studied in the setting of super-infection. We exposed wild-type and IL-22BP-/- mice to influenza A/PR/8/34 for 6 days prior to infection with S. aureus (USA300) S. pneumoniae. Super-infected IL-22BP-/- mice had decreased bacterial burden and improved survival compared to controls. IL-22BP-/- mice exhibited decreased inflammation, increased lipocalin 2 expression, and deletion of IL-22BP was associated with preserved epithelial barrier function with evidence of improved tight junction stability. Human bronchial epithelial cells treated with IL-22Fc showed evidence of improved tight junctions compared to untreated cells. This study revealed that IL-22BP-/- mice are protected during influenza, bacterial super-infection, suggesting that IL-22BP has a pro-inflammatory role and impairs epithelial barrier function likely through interaction with IL-22.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Contexto en salud:
4_TD
Problema de salud:
4_pneumonia
Asunto principal:
Infecciones Bacterianas
/
Sobreinfección
/
Proteínas Portadoras
/
Interleucinas
/
Infecciones por Orthomyxoviridae
Límite:
Animals
Idioma:
En
Revista:
Mucosal Immunol
Asunto de la revista:
ALERGIA E IMUNOLOGIA
Año:
2019
Tipo del documento:
Article
País de afiliación:
Estados Unidos