Poliovirus-specific CD4+ Th1 clones with both cytotoxic and helper activity mediate protective humoral immunity against a lethal poliovirus infection in transgenic mice expressing the human poliovirus receptor.
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- B P Mahon
- Department of Biology, St. Patrick's College, Maynooth, County Kildare, Ireland.
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- K Katrak
- Department of Biology, St. Patrick's College, Maynooth, County Kildare, Ireland.
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- A Nomoto
- Department of Biology, St. Patrick's College, Maynooth, County Kildare, Ireland.
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- A J Macadam
- Department of Biology, St. Patrick's College, Maynooth, County Kildare, Ireland.
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- P D Minor
- Department of Biology, St. Patrick's College, Maynooth, County Kildare, Ireland.
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- K H Mills
- Department of Biology, St. Patrick's College, Maynooth, County Kildare, Ireland.
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<jats:p>The current understanding of the function of CD4+ T helper (Th) cells in immunity to infectious diseases is that Th1 cells, which secrete interleukin (IL)-2 and interferon-gamma, induce cellular immune responses, whereas Th2 cells, which secrete IL-4, IL-5, IL-6, and IL-10, provide helper function for humoral immunity. We have used a panel of poliovirus-specific murine CD4+ T cell clones and mice transgenic for the human poliovirus receptor to evaluate the role of Th cell subpopulations in protective immunity to poliovirus. The majority of T cell clones, as well as polyclonal T cells generated from mice infected or immunized with poliovirus, secreted IL-2 and interferon-gamma, but not IL-4, IL-5, or IL-10, a profile typical of Th1 cells. The Th1 clones displayed major histocompatibility complex class II-restricted cytotoxic T lymphocyte activity against specific poliovirus peptide-pulsed target cells, but also provided help for antipoliovirus neutralizing antibody production. To examine the mechanism of immunity in vivo, we have used poliovirus receptor-transgenic mice on a BALB/c (H-2d) background. These animals developed a poliomyelitis-like disease when challenged intravenously with a virulent wild-type strain of poliovirus, but not with an attenuated vaccine strain. Furthermore, mice immunized with the vaccine strain were protected against a subsequent challenge with wild-type virus. Using an adoptive transfer technique, we demonstrated that it was possible to confer protection with primed B cells in the presence of polyclonal poliovirus-specific T cells, but not when transgenic mice received either B cells or T cells alone. Furthermore, protection was observed when mice received primed B cells in the presence of a VP4-specific Th1 clone. The findings demonstrate that Th1 cells can mediate a protective immune response against poliovirus infection in vivo through helper activity for humoral immunity and that CD4+ T cells, specific for the internal poliovirus capsid protein, VP4, can provide effective help for a protective antibody response directed against surface capsid proteins.</jats:p>
収録刊行物
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- The Journal of experimental medicine
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The Journal of experimental medicine 181 (4), 1285-1292, 1995-04-01
Rockefeller University Press
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詳細情報 詳細情報について
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- CRID
- 1361137046017820800
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- NII論文ID
- 30017432103
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- NII書誌ID
- AA00697559
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- ISSN
- 15409538
- 00221007
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