0000000000668629
AUTHOR
Karl-hermann Meyer Zum
Inhibition of the mixed lymphocyte reaction by T cell vaccination
Immunization with attenuated activated autoreactive T cell lines and clones induces a response in syngeneic animals which can induce protection or recovery from autoimmune disease. This process has been termed T cell vaccination. The aim of the present study was to investigate the effect of immunization with MHC-reactive T cells on the mixed lymphocyte reaction (MLR). By injecting attenuated activated T cells primed for an alloantigen, we markedly reduced the MLR in both rats and mice. This depression appeared to be mediated by active suppression; lymphoid cells from T cell-vaccinated animals suppressed the MLR responsiveness of T cells from naive animals. Suppression of the MLR was not res…
Inhibition of anti-GD3-ganglioside antibody-induced proliferation of human CD8+ T cells by CD16+ natural killer cells
The ganglioside GD3 has been described as a membrane component of human T cells which is involved in T cell growth. In the present study the activating function of GD3 for human CD4+ and CD8+ T cells was analyzed by five different monoclonal antibodies (mAb) directed against the GD3 molecule. Three mAb U5, Z21 and R24 induced strong proliferation of peripheral blood mononuclear cells and purified CD8+ and CD4+ T cells of normal donors containing less than 5% CD16+ natural killer (NK) cells. In contrast to CD4+ T cells, CD8+ T cells proliferated only weakly in the presence of 15% CD16+ NK cells. The proliferative response of purified CD4+ and CD8+ T cells (< 5% NK cells) correlated with the …