T-cell-mediated immune response in murine malaria: differential effects of antigen-specific Lyt T-cell subsets in recovery from Plasmodium yoelii infection in normal and T-cell-deficient mice.
For analysis of the role of immune T cells in protective immunity against murine malaria, Plasmodium yoelii-immune Lyt T-cell subsets were functionally characterized in vitro and in vivo. Selected Lyt2- and Lyt2+ T cells from P. yoelii-immune C57BL/10 mice differed in their capability to proliferate in response to P. yoelii antigen in vitro. Only the Lyt2- T-cell population produced T-cell growth factor upon restimulation, and none of the selected T-cell subsets produced detectable amounts of macrophage activating factor. Lyt2- but not Lyt2+ lymphocytes were capable of transferring protection to normal C57BL/10 mice. When transferred into T-cell-deficient C57BL/6-nu/nu mice, adoptive resistance to P. yoelii by Lyt2- lymphocytes was only demonstrable after prior reconstitution of recipients with normal T cells. These results suggest an interaction between P. yoelii-immune Lyt2- T cells and normal T lymphocytes via T-cell growth factor in the development of protective immunity to malaria.
Brinkmann
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V
Kaufmann
S H
SH
Simon
M M
MM
D000818:Animals; D000950:Antigens, Ly / Q000032:analysis; D000954:Antigens, Surface / Q000276:immunology; D007111:Immunity, Cellular; D007116:Immunization, Passive; D008213:Lymphocyte Activation; D008288:Malaria / Q000276:immunology*; D051379:Mice; D008810:Mice, Inbred C57BL; D008819:Mice, Nude; D010961:Plasmodium / Q000276:immunology; D013154:Spleen / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*; D018800:Thy-1 Antigens
D000950:Antigens, Ly; D000954:Antigens, Surface; D018800:Thy-1 Antigens