TY - JOUR
T1 - Mobilization of plasmacytoid and myeloid dendritic cells to mucosal sites in children with respiratory syncytial virus and other viral respiratory infections
AU - Gill, Michelle A.
AU - Palucka, A. Karolina
AU - Barton, Theresa
AU - Ghaffar, Faryal
AU - Jafri, Hasan
AU - Banchereau, Jacques
AU - Ramilo, Octavio
N1 - Funding Information:
Financial support: Baylor Health Care System Foundation; Abbott Laboratories (Pediatric Infectious Diseases Society Fellowship Award to M.A.G.); Children’s Clinical Research Advisory Committee; Children’s Medical Center of Dallas Foundation; National Institutes of Health (grant AI 54990 to O.R. and CA 78846 to J.B.). J.B. is the recipient of the W. W. Caruth Jr. Chair in Organ Transplantation Immunology. A.K.P. is the recipient of the Michael A. Ramsay Chair for Cancer Immunology Research.
PY - 2005/4/1
Y1 - 2005/4/1
N2 - Background. Respiratory syncytial virus (RSV) is the principal etiologic agent of bronchiolitis and viral pneumonia in infants and young children. Yet, many aspects of its immunopathogenesis are not well understood. Methods. We analyzed the immune cells that are mobilized by RSV and other respiratory viruses, by studying nasal wash samples from children hospitalized with acute viral respiratory infections. Results. RSV mobilizes virtually all blood immune cells, including myeloid dendritic cells (DCs) and plasmacytoid DCs (pDCs), to the nasal mucosa. DCs were also mobilized to the nasal mucosa of children with other viral respiratory infections. The increased number of pDCs in the nasal compartment significantly correlates with RSV load (P = .022), and it is associated with a significant decrease in the number of pDCs in the blood (P = .007). The influx of DCs in the nasal mucosa is not transient, as even higher numbers of both DC subsets were found in respiratory secretions weeks after the acute symptoms of RSV infection had resolved. Immunochemistry analysis of respiratory samples has demonstrated the presence of the RSV fusion protein within HLA-DR-positive cells. Conclusion. Infection with RSV and other respiratory viruses mobilizes DCs to the site of viral entry.
AB - Background. Respiratory syncytial virus (RSV) is the principal etiologic agent of bronchiolitis and viral pneumonia in infants and young children. Yet, many aspects of its immunopathogenesis are not well understood. Methods. We analyzed the immune cells that are mobilized by RSV and other respiratory viruses, by studying nasal wash samples from children hospitalized with acute viral respiratory infections. Results. RSV mobilizes virtually all blood immune cells, including myeloid dendritic cells (DCs) and plasmacytoid DCs (pDCs), to the nasal mucosa. DCs were also mobilized to the nasal mucosa of children with other viral respiratory infections. The increased number of pDCs in the nasal compartment significantly correlates with RSV load (P = .022), and it is associated with a significant decrease in the number of pDCs in the blood (P = .007). The influx of DCs in the nasal mucosa is not transient, as even higher numbers of both DC subsets were found in respiratory secretions weeks after the acute symptoms of RSV infection had resolved. Immunochemistry analysis of respiratory samples has demonstrated the presence of the RSV fusion protein within HLA-DR-positive cells. Conclusion. Infection with RSV and other respiratory viruses mobilizes DCs to the site of viral entry.
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U2 - 10.1086/428589
DO - 10.1086/428589
M3 - Article
C2 - 15747246
AN - SCOPUS:15544362414
SN - 0022-1899
VL - 191
SP - 1105
EP - 1115
JO - Journal of Infectious Diseases
JF - Journal of Infectious Diseases
IS - 7
ER -