Qualitative and quantitative requirements for CD4+ T cell-mediated antiviral protection

Maloy, K. J. et al. (1999) Qualitative and quantitative requirements for CD4+ T cell-mediated antiviral protection. Journal of Immunology, 162(5), pp. 2867-2874. (PMID:10072535)

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Publisher's URL: https://www.jimmunol.org/content/162/5/2867

Abstract

CD4+ Th cells deliver the cognate and cytokine signals that promote the production of protective virus-neutralizing IgG by specific B cells and are also able to mediate direct antiviral effector functions. To quantitatively and qualitatively analyze the antiviral functions of CD4+ Th cells, we generated transgenic mice (tg7) expressing an MHC class II (I-Ab)-restricted TCR specific for a peptide derived from the glycoprotein (G) of vesicular stomatitis virus (VSV). The elevated precursor frequency of naive VSV-specific Th cells in tg7 mice led to a markedly accelerated and enhanced class switching to virus-neutralizing IgG after immunization with inactivated VSV. Furthermore, in contrast to nontransgenic controls, tg7 mice rapidly cleared a recombinant vaccinia virus expressing the VSV-G (Vacc-IND-G) from peripheral organs. By adoptive transfer of naive tg7 CD4+ T cells into T cell-deficient recipients, we found that 105 transferred CD4+ T cells were sufficient to induce isotype switching after challenge with a suboptimal dose of inactivated VSV. In contrast, naive transgenic CD4+ T cells were unable to adoptively confer protection against peripheral infection with Vacc-IND-G. However, tg7 CD4+ T cells that had been primed in vitro with VSV-G peptide were able to adoptively transfer protection against Vacc-IND-G. These results demonstrate that the antiviral properties of CD4+ T cells are governed by the differentiation status of the CD4+ T cell and by the type of effector response required for virus elimination.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Maloy, Professor Kevin
Authors: Maloy, K. J., Burkhart, C., Freer, G., Rülicke, T., Pircher, H., Kono, D. H., Theofilopoulos, A. N., Ludewig, B., Hoffmann-Rohrer, U., Zinkernagel, R. M., and Hengartner, H.
College/School:College of Medical Veterinary and Life Sciences > Institute of Infection Immunity and Inflammation
Journal Name:Journal of Immunology
Publisher:American Association of Immunologists
ISSN:0022-1767
ISSN (Online):1550-6606

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