TITLE

Innate Immune Signals Modulate Antiviral and Polyreactive Antibody Responses during Severe Respiratory Syncytial Virus Infection

AUTHOR(S)
Reed, Jennifer L.; Welliver, Timothy P.; Sims, Gary P.; McKinney, LuAnn; Velozo, Luis; Avendano, Luis; Hintz, Karen; Luma, Jayson; Coyle, Anthony J.; Welliver Sr., Robert C.
PUB. DATE
April 2009
SOURCE
Journal of Infectious Diseases;4/15/2009, Vol. 199 Issue 8, p1128
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Antiviral antibody production during respiratory syncytial virus (RSV) infection in infants is poorly understood. Tocharacterize local Blymphocyte responses, lung tissue and secretions from infants withRSVbronchiolitis were analyzed for innate B cell-stimulating factors and antiviral antibodies. In lung tissues of infants with fatal RSV bronchiolitis, CD20+ lymphocytes and IgM-positive, IgG-positive, and IgA-positive plasma cells were prominent but CD4+ T lymphocytes were not. Type I interferon-induced proteins and B cell tropic factors, including B cell-activating factor (BAFF) and a proliferation-inducing ligand (APRIL), were colocalized in infected epithelium. In nasopharyngeal secretions from infants who survived RSV infection, class-switched antiviral and antinucleosomal antibodies were detected at presentation and correlated with BAFF and APRIL levels. Expression of APRIL and antiviral antibodies of IgA and IgM but not IgG isotype predicted better oxygen saturation. We conclude that B lymphocyte-stimulating factors derived from infected epithelium are primary determinants of the mucosal antibody response in infant RSV bronchiolitis.
ACCESSION #
38022007

 

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