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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Zinkernagel, R. M. Hengartner, H. Maloy, K. J. Odermatt, B. |
| Description | Author Affiliation: Maloy KJ ( Institute of Experimental Immunology, Department of Pathology, University of Zürich, Schmelzbergstrasse 12, CH-8091, Zürich, Switzerland. kmaloy@pathol.unizh.ch); |
| Abstract | Ig class switching usually occurs as a consequence of cognate interactions between antigen-specific B cells and CD4(+) alphabeta T cells. Vesicular stomatitis virus (VSV) infection of immunocompetent mice induces a rapid T-independent neutralizing IgM response followed by a long-lived T-dependent IgG response. Surprisingly, alphabeta T cell-deficient (TCRalpha-/-) mice also produced neutralizing IgG antibodies when infected with live VSV or with a recombinant vaccinia virus expressing the VSV glycoprotein (Vacc-IND-G), but not when immunized with UV-inactivated VSV (UV-VSV). The neutralizing IgG responses did not require the presence of NK cells or complement, but were crucially dependent on IFN-gamma and were predominantly of the IgG2a isotype. IgG production depended on residual CD3(+) non-alphabeta T cell populations present in the TCRalpha-/- mice, which produced IFN-gamma upon in vitro stimulation. A key role for gammadelta T cells was confirmed by the fact that TCRbeta-/- mice also generated strong neutralizing IgG responses to VSV, whereas TCRbeta-/-delta-/- mice produced very low titers. The neutralizing IgG responses of TCRalpha-/- mice were accompanied by the development of memory B cells, but not by antigen-specific germinal center (GC) formation. Thus, during viral infection of alphabeta T cell-deficient mice, gammadelta T cells may provide the signals that are required for isotype switching. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 3 |
| Volume Number | 95 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1998-03-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Antibodies, Viral Biosynthesis Germinal Center Immunology Virology Immunoglobulin Class Switching Immunoglobulin G Interferon-gamma Receptors, Antigen, T-Cell, Gamma-delta Vesicular Stomatitis Indiana Virus Animals Complement Activation Killer Cells, Natural Mice Mice, Inbred C57BL Rhabdoviridae Infections Stomatitis T-Lymphocytes Physiology Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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