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- W1985405004 abstract "The anti-CD3 antibody BMA030 (IgG2a isotype) induces T cell activation and proliferation if an interaction with monocytes is provided. In contrast to other anti-CD3 antibodies, it is unable to induce interleukin (IL)2 responsiveness through cross-linking by plastic-bound goat anti mouse Ig antibodies (panning). Cross-linking BMA030 with a second anti-T cell antibody is, however, able to induce IL 2 responsiveness in monocyte-depleted T cell cultures. In this report we show that a large number of different antibodies are suitable for this dual antibody stimulation, and that the extent of proliferation corresponds to the percentage of T cells expressing the respective T cell antigen. Proliferation induced by low concentrations (0.1-1 ng/ml) of other anti-CD3 antibodies requires also cross-linking with second anti-T cell antibodies. The proliferative response of monocyte-depleted T cells to two cross-linked anti-T cell antibodies plus added IL 2 is of the same magnitude as the one induced by anti-CD3 antibodies plus monocytes. On the other hand, if monocytes are present, soluble anti-CD2, -CD4, -CD8, -LFA-1 antibodies (IgG1 or F(ab')2 fragments) can inhibit OKT3 or BMA030-induced T cell activation. Anti-CD6 antibodies do not interfere with this monocyte-dependent T cell stimulation. We conclude that dual antibody stimulation mimics the physical contact of T cells with monocyte membranes, where the T cell receptor CD3 complex is cross-linked with neighboring structures (mainly so-called adhesion molecules) through the interaction with respective counter-structures on monocyte membranes. Dual antibody cross-linking bypasses this interaction and can be used to stimulate IL 2 responsiveness of antibody-defined T cells." @default.
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- W1985405004 date "1987-01-01" @default.
- W1985405004 modified "2023-09-28" @default.
- W1985405004 title "T cell activation by cross-linking anti-CD3 antibodies with second anti-T cell antibodies: dual antibody cross-linking mimics physical monocyte interaction" @default.
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- W1985405004 doi "https://doi.org/10.1002/eji.1830171114" @default.
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