23 results on '"Ptak, W."'
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2. Delayed-type hypersensitivity in mast cell-deficient mice: dependence on platelets for expression of contact sensitivity.
3. Immune or normal gamma delta T cells that assist alpha beta T cells in elicitation of contact sensitivity preferentially use V gamma 5 and V delta 4 variable region gene segments.
4. Adoptive cell transfer of contact sensitivity-initiation mediated by nonimmune cells sensitized with monoclonal IgE antibodies. Dependence on host skin mast cells.
5. Gamma delta T cells in normal spleen assist immunized alpha beta T cells in the adoptive cell transfer of contact sensitivity. Effect of Bordetella pertussis, cyclophosphamide, and antibodies to determinants on suppressor cells.
6. Gamma delta T cells assist alpha beta T cells in adoptive transfer of contact sensitivity.
7. Initiation of delayed-type hypersensitivity by low doses of monoclonal IgE antibody. Mediation by serotonin and inhibition by histamine.
8. Delayed-type hypersensitivity initiation by early-acting cells that are antigen mismatched or MHC incompatible with late-acting, delayed-type hypersensitivity effector T cells.
9. Immunoregulatory role of Ig isotypes. II. Activation of cells that block induction of contact sensitivity responses by antibodies of IgG2a and IgG2b isotypes.
10. Production of antigen-specific contrasuppressor cells and factor, and their use in augmentation of cell-mediated immunity.
11. Cellular interactions in the adoptive transfer of contact sensitivity: characterization of an antigen-nonspecific Vicia villosa-adherent T cell needed for adoptive transfer into naive recipients.
12. Mechanism of action of a T suppressor factor (TsF) in contact sensitivity: the T cell target for TsF activity in adoptive transfer of immunity is not effector cell.
13. Heterologous antisera to Lyt-1+, 2- -derived antigen-binding factor detect a subfactor of an antigen-specific suppressor factor and cell surface proteins on Lyt-1+, 2- and Lyt-1-, 2+ T cells.
14. Characterization of two different Ly-1+ T cell populations that mediate delayed-type hypersensitivity.
15. The DTH-initiating Thy-1+ cell is double-negative (CD4-, CD8-) and CD3-, and expresses IL-3 receptors, but no IL-2 receptors.
16. Antigen-specific T contrasuppressor factor in cell-mediated immunity: interactions leading to eradication of the tolerant state.
17. Isotype-like suppression of T cell-mediated immunity in vivo. I. Delayed-type hypersensitivity specificity of T cell suppression induced by antigen-binding T cell factors that initiate contact sensitivity.
18. Immunoregulatory role of Ig isotypes. I. Induction of contrasuppressor T cells for contact sensitivity responses by antibodies of the IgM, IgG1, and IgG3 isotypes.
19. Isotype-like suppression of T cell-mediated immunity in vivo. II. Suppression of the early component of contact sensitivity by a Ly-2+ T cell-derived suppressor factor that binds to contact sensitivity-initiating, antigen-specific, Ly-1+ T cell-derived factors that are of different antigen specificities.
20. Defective elicitation of delayed-type hypersensitivity in W/Wv and SI/SId mast cell-deficient mice.
21. Suppression and contrasuppression in the induction of contact sensitivity by the administration of cellbound antigen-antibody complexes.
22. Nude mice produce a T cell-derived antigen-binding factor that mediates the early component of delayed-type hypersensitivity.
23. Purification and characterization of TNP-specific immunoregulatory molecules produced by T cells sensitized by picrylchloride (PC1F).
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