PMID- 7585649 OWN - NLM STAT- MEDLINE DCOM- 19951214 LR - 20181130 IS - 0008-5472 (Print) IS - 0008-5472 (Linking) VI - 55 IP - 23 DP - 1995 Dec 1 TI - Methylcholanthrene-induced mouse sarcomas express individually distinct major histocompatibility complex class I-associated peptides recognized by specific CD8+ T-cell lines. PG - 5648-55 AB - Mouse sarcomas induced by methylcholanthrene (MC) are immunologically distinct even if they are induced in the same strain of mice. T-cell lines were derived from mice immunized against a series of syngeneic MC sarcomas on B6 background, known to carry unique tumor-specific transplantation antigens. Tumor necrosis factor-alpha (TNF-alpha) release assays concurred with the in vivo rejection tests. The strongest response in the TNF-alpha release was always obtained with the corresponding tumor, with very limited cross-reactivity against five other MC tumors or two virally induced B6 lymphomas. The specific TNF-alpha release from the anti-MC tumor CTL lines was mainly mediated by CD8+ cells. T-cell lines from intact and CD4-/- mice gave a similarly specific pattern. In contrast, T-cell lines derived from CD8-/- mice cross-reacted with several other MC-induced tumors. Peptides eluted from MC sarcomas under mild acid conditions were fractionated by reverse-phase high performance liquid chromatography and tested for their ability to sensitize the processing- and presentation-defective mutant RMA-S line. Only one high performance liquid chromatographic fraction from each of the three different tumor-derived peptide eluates capacitated RMA-S to induce TNF-alpha release and sensitized the cell to the cytotoxic effect of the corresponding tumor-specific T-cell line. A different Kb-restricted peptide fraction was active for each of the three MC sarcomas tested, indicating that they all expressed individually distinct peptide epitopes. FAU - Kono, K AU - Kono K AD - Microbiology and Tumor Biology Center, Karolinska Institute, Stockholm, Sweden. FAU - Petersson, M AU - Petersson M FAU - Ciupitu, A M AU - Ciupitu AM FAU - Wen, T AU - Wen T FAU - Klein, G AU - Klein G FAU - Kiessling, R AU - Kiessling R LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Cancer Res JT - Cancer research JID - 2984705R RN - 0 (Epitopes) RN - 0 (Histocompatibility Antigens Class I) RN - 0 (Peptide Fragments) RN - 0 (Tumor Necrosis Factor-alpha) RN - 56-49-5 (Methylcholanthrene) SB - IM MH - Animals MH - CD8-Positive T-Lymphocytes/*immunology MH - Cross Reactions MH - Dose-Response Relationship, Immunologic MH - Epitopes/immunology/pharmacology MH - Histocompatibility Antigens Class I/*metabolism/pharmacology MH - Humans MH - Methylcholanthrene MH - Mice MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Peptide Fragments/immunology MH - Sarcoma, Experimental/chemically induced/*immunology MH - T-Lymphocytes, Cytotoxic/*immunology MH - Tumor Cells, Cultured MH - Tumor Necrosis Factor-alpha/*metabolism EDAT- 1995/12/01 00:00 MHDA- 1995/12/01 00:01 CRDT- 1995/12/01 00:00 PHST- 1995/12/01 00:00 [pubmed] PHST- 1995/12/01 00:01 [medline] PHST- 1995/12/01 00:00 [entrez] PST - ppublish SO - Cancer Res. 1995 Dec 1;55(23):5648-55.