The Effect of Polymeric Immunoglobulin Receptor on Eosinophil Degranulation in Respiratory Syncytial Virus Infection of Respiratory Epithelial Cells / 대한이비인후과학회지
Korean Journal of Otolaryngology - Head and Neck Surgery
;
: 481-487, 2003.
Artigo
em Coreano
| WPRIM
| ID: wpr-655847
ABSTRACT
BACKGROUND AND OBJECTIVES:
The presence of eosinophil-specific cytotoxic mediators in nasopharyngeal secretions of infants with more severe RSV infection in the respiratory tract suggests that eosinophils play a key role in the pathogenesis of RSV-induced airway inflammation and the associated epithelial damage. A recent report demonstrated that RSV-infected respiratory cells induce eosinophil degranulation by a CD11b/CD18-dependent, ICAM-1-independent mechanism. However, the molecule on the epithelial cell membrane involved in the receptor-mediated degranulation of eosinophils after RSV infection has not been clearly identified. MATERIALS ANDMETHOD:
We investigated the effect of RSV infection on the expression of pIgR on A549 cells and blocking of the RSV-infected cell induced eosinophil degranulation with monoclonal antibodies of the pIgR.RESULTS:
After 24h of RSV infection, A549 cells expressed pIgR remarkably whereas pIgR was hardly expressed by the uninfected cells in flow cytometry and in the semi-quantitative RT-PCR. CD11b/CD18 on eosinophils was highly expressed by the RSV conditioned media. Purified eosinophils cocultured with the RSV-infected A549 cells showed approximately eightfold increase in ECP in the isotype control, compared with the control and that was blocked by treatment of anti-pIgR monoclonal antibody.CONCLUSION:
It is strongly suggested that pIgR expression in the epithelial cells may be a key factor for eosinophil degranulation via interaction with CD11b/CD18 in the RSV-infected epithelial cells.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Polímeros
/
Vírus Sinciciais Respiratórios
/
Sistema Respiratório
/
Meios de Cultivo Condicionados
/
Receptores de Imunoglobulina Polimérica
/
Eosinófilos
/
Células Epiteliais
/
Citometria de Fluxo
/
Inflamação
/
Membranas
Tipo de estudo:
Estudo prognóstico
Limite:
Humanos
/
Lactente
Idioma:
Coreano
Revista:
Korean Journal of Otolaryngology - Head and Neck Surgery
Ano de publicação:
2003
Tipo de documento:
Artigo
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