Blockade of the interleukin-2 receptor by anti-Tac antibody inhibits the generation of antigen-nonspecific suppressor T cells in vitro.
Year: 1988
Type: article
Abstract: The role of interleukin 2 (IL-2) in the activation of suppressor T cells was investigated by using the monoclonal antibody anti-Tac, which blocks the binding of IL-2 to the 55-kDa peptide of the high-affinity IL-2 receptor. Anti-Tac was added to an antigen-nonspecific suppressor system in which Con A-induced suppressor T cells were generated during a preculture period, and their effects on immunoglobulin production were assessed in second, indicator cultures containing pokeweed mitogen and peripheral blood mononuclear cells. Anti-Tac added during the preculture period inhibited Con A-induced suppressor T-cell generation. Cells activated by a short (2-day) preculture period to become effectors of suppression were primarily of the Tac-positive, T8 (CD8)-positive phenotype. Tac-positive, T8-negative T cells might also contribute to the suppressor activity. Our studies indicate that anti-Tac, by producing a functional blockade of human high-affinity IL-2 receptors, inhibits the generation of antigen-nonspecific suppressor T cells.
Authors: T Oh-Ishi, C K Goldman, J Misiti, T A Waldmann
Institutions: National Cancer Institute, National Institutes of Health
Language: English
Topic: T-cell and B-cell Immunology
Subfield: Immunology
Field: Immunology and Microbiology
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W2034834960