Abstract
Respiratory syncytial virus (RSV) is the major leading cause of infantile viral bronchiolitis. However, cellular phenotypes contributing to the RSV protection and vaccine-enhanced disease remain largely unknown. Upon RSV challenge, we analyzed phenotypes and cellularity in the lung of mice that were naïve, immunized with formalin inactivated RSV (FI-RSV), or re-infected with RSV. In comparison with naïve and live RSV re-infected mice, the high levels of eosinophils, neutrophils, plasmacytoid and CD11b(+) dendritic cells, and IL-4(+) CD4(+) T cells were found to be contributing to pulmonary inflammation in FI-RSV immune mice despite lung viral clearance. Alveolar macrophages appeared to play differential roles in protection and inflammation upon RSV infection of different RSV immune mice. These results suggest that multiple innate and adaptive immune components differentially contribute to RSV disease and inflammation.
Keywords:
Alveolar macrophages; Clodronate liposome; Formalin-inactivated RSV; Respiratory syncytial virus (RSV); Vaccine.
Copyright © 2015 Elsevier Inc. All rights reserved.
Publication types
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Research Support, N.I.H., Extramural
MeSH terms
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Adaptive Immunity
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Animals
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CD4-Positive T-Lymphocytes / immunology
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CD4-Positive T-Lymphocytes / pathology
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CD4-Positive T-Lymphocytes / virology
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Clodronic Acid / pharmacology
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Dendritic Cells / immunology
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Dendritic Cells / pathology
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Dendritic Cells / virology
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Eosinophils / immunology
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Eosinophils / pathology
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Eosinophils / virology
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Female
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Formaldehyde
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Immunity, Innate
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Immunization
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Interleukin-4 / biosynthesis
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Liposomes / pharmacology
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Lung / drug effects
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Lung / immunology
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Lung / pathology*
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Lung / virology
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Macrophages, Alveolar / drug effects
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Macrophages, Alveolar / immunology
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Macrophages, Alveolar / pathology*
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Macrophages, Alveolar / virology
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Mice
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Mice, Inbred BALB C
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Neutrophils / immunology
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Neutrophils / pathology
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Neutrophils / virology
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Phenotype
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Respiratory Syncytial Virus Infections / immunology
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Respiratory Syncytial Virus Infections / pathology*
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Respiratory Syncytial Virus Infections / prevention & control*
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Respiratory Syncytial Virus Infections / virology
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Respiratory Syncytial Virus Vaccines / administration & dosage*
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Respiratory Syncytial Viruses
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Vaccines, Inactivated
Substances
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Liposomes
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Respiratory Syncytial Virus Vaccines
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Vaccines, Inactivated
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Clodronic Acid
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Formaldehyde
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Interleukin-4