title: Hapten-specific T cell response to azobenzenearsonate-N-acetyl-L-tyrosine in the Lewis rat. I. Induction and suppression of delayed-type hypersensitivity and in vitro proliferative responses.
abstract: Pretreatment of Lewis rats with a single i.p. injection of ABA-N-acetyl-tyrosine in incomplete Freund's adjuvant induced an unresponsiveness for delayed-type hypersensitivity to subsequent immunization with the same antigen in complete Freund's adjuvant. Complete suppression of in vitro antigen-induced proliferative responses required repeated pretreatment. Passive transfer of lymphoid cells from spleen and lymph nodes but not sera from suppressed rats induced unresponsiveness of hapten-specific T cell functions. Nylon wool-nonadherent cells and cells panned on F(ab')2 of rabbit anti-Lewis rat Ig plates suppressed the induction of DTH and in vitro antigen-stimulated proliferation. Adult thymectomy increased DTH and failed to abolish the induction of suppression.
mesh_terms: D000818:Animals; D001391:Azo Compounds / Q000276:immunology*; D003429:Cross Reactions; D005260:Female; D005620:Freund's Adjuvant / Q000494:pharmacology; D006241:Haptens; D006968:Hypersensitivity, Delayed / Q000276:immunology; D007116:Immunization, Passive; D008213:Lymphocyte Activation; D051379:Mice; D051381:Rats; D011917:Rats, Inbred Lew; D013601:T-Lymphocytes / Q000276:immunology*; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*; D013997:Time Factors; D014443:Tyrosine / Q000031:analogs & derivatives* / Q000276:immunology; D010132:p-Azobenzenearsonate / Q000031:analogs & derivatives / Q000276:immunology*
chemical_list: D001391:Azo Compounds; D006241:Haptens; C000234:azobenzenearsonate-N-acetyl-L-tyrosine; D014443:Tyrosine; D010132:p-Azobenzenearsonate; D005620:Freund's Adjuvant