Characterization of interleukin 2 (IL-2)-dependent cytotoxic T-cell clones. V. Transfer of resistance to allografts and tumor grafts requires exogenous IL-2.
The adoptive transfer of resistance to tumor grafts with cloned interleukin 2 (IL-2)-dependent cytotoxic T-cell lines was examined. Two clones were used: clone CTLL-A2 which recognizes H-2Dd determinants and clone CTLL-R5 which recognizes a unique cell surface antigen of BALB/c leukemia RL male 1. Systemic transfer of resistance with these clones was accomplished only when exogenous (rat or human) IL-2 was administered at the same time. Intraperitoneal injection of CTLL-A2 cells accelerated rejection of sarcoma Meth A (H-2Dd), but not ascites sarcoma BP8 (H-2k) or leukemia EL4 (H-2b) inoculated subcutaneously into C57BL/6 mice. CTLL-R5 cells were examined in local (Winn tests) as well as systemic transfer experiments. When mixed with leukemia cells before subcutaneous injection, they suppressed the growth of leukemia RL male 1 without exogenous IL-2. When injected intraperitoneally, CTLL-R5 cells inhibited the growth of subcutaneous grafts of leukemia RL male 1 only when exogenous IL-2 was administered at the same time. CTLL-R5 did not inhibit the growth of other radiation-induced BALB/c leukemias.
D000818:Animals; D002460:Cell Line; D002478:Cells, Cultured; D003602:Cytotoxicity, Immunologic; D006084:Graft Rejection; D007116:Immunization, Passive; D007376:Interleukin-2 / Q000096:biosynthesis / Q000302:isolation & purification / Q000494:pharmacology*; D007942:Leukemia, Experimental / Q000276:immunology*; D051379:Mice; D008815:Mice, Inbred Strains; D009368:Neoplasm Transplantation; D012513:Sarcoma, Experimental / Q000276:immunology*; D013045:Species Specificity; D013601:T-Lymphocytes / Q000187:drug effects / Q000276:immunology*; D014184:Transplantation, Homologous
D007376:Interleukin-2