Functional invariant NKT cells in pig lungs regulate the airway hyperreactivity: a potential animal model.
Important roles played by invariant natural killer T (iNKT) cells in asthma pathogenesis have been demonstrated. We identified functional iNKT cells and CD1d molecules in pig lungs. Pig iNKT cells cultured in the presence of α-GalCer proliferated and secreted Th1 and Th2 cytokines. Like in other animal models, direct activation of pig lung iNKT cells using α-GalCer resulted in acute airway hyperreactivity (AHR). Clinically, acute AHR-induced pigs had increased respiratory rate, enhanced mucus secretion in the airways, fever, etc. In addition, we observed petechial hemorrhages, infiltration of CD4(+) cells, and increased Th2 cytokines in AHR-induced pig lungs. Ex vivo proliferated iNKT cells of asthma induced pigs in the presence of C-glycoside analogs of α-GalCer had predominant Th2 phenotype and secreted more of Th2 cytokine, IL-4. Thus, baby pigs may serve as a useful animal model to study iNKT cell-mediated AHR caused by various environmental and microbial CD1d-specific glycolipid antigens.
Duke Scholars
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Related Subject Headings
- Swine
- Pneumonia
- Natural Killer T-Cells
- Monosaccharides
- Lymphocyte Activation
- Lung
- Immunology
- Glycosides
- Disease Models, Animal
- Bronchial Hyperreactivity
Citation
Published In
DOI
EISSN
Publication Date
Volume
Issue
Start / End Page
Location
Related Subject Headings
- Swine
- Pneumonia
- Natural Killer T-Cells
- Monosaccharides
- Lymphocyte Activation
- Lung
- Immunology
- Glycosides
- Disease Models, Animal
- Bronchial Hyperreactivity