title: Immunoregulatory circuits among T-cell sets. Identification of a subpopulation of T-helper cells that induces feedback inhibition.
abstract: Purified Ly1 cells induce other T-cell sets to exert potent feedback inhibitory activity and this T-T interaction has been shown to play an important role in regulating in vivo immune responses. Approximately 2/3 of Ly1 cells also express the Qa1 surface phenotype (Ly1:Qa1+ cells). The experiments reported here indicate that Ly1:Qal+ cells are responsible for induction of feedback inhibition and that signals from both Ly1:Qal+ cells and Ly1:Qal- cells are required for optimal formation of antibody by B cells.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D000954:Antigens, Surface / Q000032:analysis*; D005246:Feedback; D007165:Immunosuppression Therapy; D007519:Isoantigens / Q000032:analysis; D008211:Lymphocyte Cooperation; D051379:Mice; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000954:Antigens, Surface; D007519:Isoantigens