title: Isolation and characterization of a T suppressor factor by using a monoclonal antibody.
abstract: We have developed a monoclonal antibody to a T cell-derived suppressor factor (TsF) found in the serum of C57BL/6 mice hyperimmune to sheep red blood cells (SRBC). The antibody binds to the SRBC-specific TsF as well as to a TsF (TNP-TsF) from another system differing in both antigen specificity and MHC. It does not bind to unrelated proteins. The antibody inhibits the activity of the SRBC-specific TsF in vitro. By using the monoclonal anti-TsF, we can isolate sufficient quantities of TsF to demonstrate that it fulfills several properties that have been attributed to TsF, namely, MHC restriction, antigen specificity, and the requirement for a second chain. Also, the purified TsF gives a single 68,000 dalton band upon SDS-PAGE gel analysis under reducing conditions. We conclude, therefore, that we have a method of the isolation of pure TsF, as well as a probe for the genetic, biochemical, and biologic analysis of TsF.
authors.forename: T A
authors.initials: TA
authors.lastname: Ferguson
authors.forename: K D
authors.initials: KD
authors.lastname: Beaman
authors.forename: G M
authors.initials: GM
authors.lastname: Iverson
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000096:biosynthesis; D000918:Antibody Specificity; D004591:Electrophoresis, Polyacrylamide Gel; D004797:Enzyme-Linked Immunosorbent Assay; D000939:Epitopes / Q000032:analysis; D000949:Histocompatibility Antigens Class II / Q000235:genetics; D007108:Immune Tolerance; D007143:Immunoglobulin Heavy Chains / Q000235:genetics; D008222:Lymphokines / Q000032:analysis / Q000276:immunology / Q000302:isolation & purification*; D051379:Mice; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D051381:Rats; D013491:Suppressor Factors, Immunologic
chemical_list: D000911:Antibodies, Monoclonal; D000939:Epitopes; D000949:Histocompatibility Antigens Class II; D007143:Immunoglobulin Heavy Chains; D008222:Lymphokines; D013491:Suppressor Factors, Immunologic