title: The role of suppression in immunoregulation: in vivo analysis using a monoclonal antibody to T suppressor factors.
abstract: We have used a monoclonal antibody (mAb)-specific for murine T suppressor (Ts) cells (mAb 14-12) to study the role of T cells in tolerance and immunoregulation. We demonstrate that mAb 14-12 can block in vivo Ts cell activity in a variety of experimental systems. It prevents the induction of Ts cells induced by i.v. injection of the water-soluble hapten 2,4,6-trinitrobenzene sulfonic acid, and the protein antigen bovine serum albumin. When 14-12 mAb is given prior to the i.v. injection of trinitrophenyl-conjugated spleen cells (TNP-SC) it blocks the induction of Ts cells and sufficiently overcomes suppression so that TNP-SC is able to induce immunity. mAb 14-12 can convert nonresponder mice into responders for the Ir gene-controlled response to the random terpolymer L-glutamic acid60-L-alanine30-L-tyrosine 10 (GAT), and can substitute for cyclophosphamide in overcoming a suppressor barrier in the adoptive transfer of contact sensitivity. Administration of 14-12 mAb just prior to immunization results in the augmentation of contact sensitivity, antibody and plaque-forming cell responses. These results demonstrate the versatility of this reagent for the study of Ts cell activity.
authors.affiliation: Department of Ophthalmology, Washington University School of Medicine, St. Louis, MO 63110.
authors.forename: T A
authors.initials: TA
authors.lastname: Ferguson
authors.forename: W
authors.initials: W
authors.lastname: Ptak
authors.forename: G M
authors.initials: GM
authors.lastname: Iverson
authors.forename: P
authors.initials: P
authors.lastname: Flood
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology*; D000917:Antibody Formation; D003520:Cyclophosphamide / Q000494:pharmacology; D005802:Genes, MHC Class II; D006241:Haptens; D007108:Immune Tolerance; D007116:Immunization, Passive; D051379:Mice; D010455:Peptides / Q000276:immunology; D011108:Polymers; D013491:Suppressor Factors, Immunologic / Q000502:physiology*; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D006241:Haptens; D010455:Peptides; D011108:Polymers; D013491:Suppressor Factors, Immunologic; C020749:GAT; D003520:Cyclophosphamide