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.
Article
in Korean
| 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.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Polymers
/
Respiratory Syncytial Viruses
/
Respiratory System
/
Culture Media, Conditioned
/
Receptors, Polymeric Immunoglobulin
/
Eosinophils
/
Epithelial Cells
/
Flow Cytometry
/
Inflammation
/
Membranes
Type of study:
Prognostic study
Limits:
Humans
/
Infant
Language:
Korean
Journal:
Korean Journal of Otolaryngology - Head and Neck Surgery
Year:
2003
Type:
Article
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