CD4- CD8- TCR alpha/beta+ suppressor T cells demonstrated in mice 1 day after thermal injury.
We have described previously that CD8+ CD11b+ TCR gamma/delta+ type 2 T cells (BA-type 2 T cells) and suppressor macrophages (Sup-Mł) are generated in spleens of mice 3 to 5 days (Sup-Mł) and 4 to 9 days (BA-type 2 T cells) after thermal injury. In the present study, an additional suppressor T cell, characterized as CD3+ CD4- CD8- TCR alpha/beta+ T cells (double negative suppressor T cells, DN Sup-T cells), was demonstrated in mice 1 day after thermal injury. DN Sup-T cells inhibited the proliferation of lymphocytes stimulated with allogeneic cells or a lectin in a mixed lymphocyte reaction, and produced both type 1 and type 2 cytokines (interferon-gamma, interleukin-2, interleukin-4, and interleukin-10) when they were stimulated in vitro with anti-CD3 monoclonal antibody. These results suggest that DN Sup-T cells express phenotypic properties similar to natural suppressor cells and cytokine-producing profiles different from type 1 (Th1 cells and CTLs) and type 2 T cells (Th2 cells and CD8+ type 2 T cells). DN Sup-T cells may play a role on the burn-associated immunosuppression appearing in the acute phase of thermally injured individuals.
Matsuo
R
R
Department of Internal Medicine, University of Texas Medical Branch, Galveston 77555, USA.
Herndon
D N
DN
Kobayashi
M
M
Pollard
R B
RB
Suzuki
F
F
D000818:Animals; D002056:Burns / Q000276:immunology*; D017252:CD3 Complex / Q000276:immunology; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology*; D007108:Immune Tolerance; D008213:Lymphocyte Activation; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D010641:Phenotype; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000276:immunology*; D013154:Spleen / Q000276:immunology*; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*; D013997:Time Factors
D017252:CD3 Complex; D016693:Receptors, Antigen, T-Cell, alpha-beta