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The role of adherent accessory cells in the generation of effector suppressor T cells.

P. B. Hausman,H. Kawasaki,R. O'hara,M. Minami,D. Sherr,M. Dorf

Published 1986 in Journal of Immunology

ABSTRACT

The role of accessory cell populations in the generation of effector suppressor (Ts3) cells was studied. By using an in vitro culture system, it was previously determined that the induction of NP-specific effector suppressor activity requires T cells, antigen, and an anti-idiotypic B cell population. We now demonstrate that the generation of Ts3 cells in this system also requires accessory cells. The accessory population appears to play a role in the processing and presentation of antigen. These antigen-presenting accessory cells are required early in the induction phase of Ts3 generation. These accessory cells can present NP coupled to immunogenic or non-immunogenic polypeptide carriers, including polymers of L-amino acids. However, NP coupled to polymers of poorly metabolized D-amino acids fail to induce suppressor T cell generation. Furthermore, the data demonstrate that an H-2 homology must exist between the Ts3 precursors and the antigen-presenting cell population if suppressor activity is to be generated. We also characterize the differential genetic restrictions that govern the induction of Ts3 cells that control suppression of either T cell or B cell responses. The data suggest that although I-J region encoded gene products control the induction and effector phases of suppressor cell activity as measured on T cell responses, the suppression of B cell responses appear to be controlled by I-A gene products. Possible cellular mechanisms that might explain these findings are discussed.

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