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Impaired antibody response causes persistence of prototypic T cell-contained virus

Flatz, Lukas
Verschoor, Admar
Hegazy, Ahmed N.
Holdener, Martin
Fink, Katja
Eschli, Bruno
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Published in PLoS biology. 2009, vol. 7, no. 4, e1000080
Abstract CD8 T cells are recognized key players in control of persistent virus infections, but increasing evidence suggests that assistance from other immune mediators is also needed. Here, we investigated whether specific antibody responses contribute to control of lymphocytic choriomeningitis virus (LCMV), a prototypic mouse model of systemic persistent infection. Mice expressing transgenic B cell receptors of LCMV-unrelated specificity, and mice unable to produce soluble immunoglobulin M (IgM) exhibited protracted viremia or failed to resolve LCMV. Virus control depended on immunoglobulin class switch, but neither on complement cascades nor on Fc receptor gamma chain or Fc gamma receptor IIB. Cessation of viremia concurred with the emergence of viral envelope-specific antibodies, rather than with neutralizing serum activity, and even early nonneutralizing IgM impeded viral persistence. This important role for virus-specific antibodies may be similarly underappreciated in other primarily T cell-controlled infections such as HIV and hepatitis C virus, and we suggest this contribution of antibodies be given consideration in future strategies for vaccination and immunotherapy.
Keywords AnimalsAntibodies, Viral/physiologyArenaviridae Infections/immunologyCD8-Positive T-Lymphocytes/physiologyComplement System Proteins/immunologyDisease Models, AnimalImmunoglobulin Class Switching/physiologyImmunoglobulin G/immunologyImmunoglobulin M/immunologyLymphocytic choriomeningitis virus/immunologyMiceMice, Inbred BALB CMice, Inbred C57BLReceptors, Antigen, B-CellViral LoadViremia/immunologyVirus Diseases/immunology
PMID: 19355789
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Research groups Centre de Vaccinologie et d'Immunologie néonatale (177)
Infections virales persistantes et maladies autoimmunes (849)
La Sclérose en plaques (908)
(ISO format)
BERGTHALER, Andréas et al. Impaired antibody response causes persistence of prototypic T cell-contained virus. In: PLOS Biology, 2009, vol. 7, n° 4, p. e1000080. doi: 10.1371/journal.pbio.1000080 https://archive-ouverte.unige.ch/unige:5655

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Deposited on : 2010-03-30

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