title: Differential lack of class I H-2d antigen expression by sublines of the BALB/c S49 T cell lymphoma.
abstract: Five different sublines of the BALB/c murine S49.1 T cell lymphoma were found to exhibit distinct patterns of absence of detectable H-2d class I major histocompatibility antigen expression. The results were demonstrated and verified by a) the generation of H-2Kd-, H-2Dd,Ld-, and H-2Ld-specific cytotoxic T lymphocytes that were assayed on S49.1 target cell lines, b) antibody-mediated cytotoxicity with the use of anti-H-2d monoclonal reagents, and c) flow microfluorometry. The five lines investigated were S49.1, T-25, T-25ADH, Thy-1-, and 100/0. None of these lines expressed detectable levels of Ld. S49.1 expressed both Kd and Dd, T-25 and T-25ADH expressed Dd but not Kd or Ld, Thy-1- expressed Kd but not Dd or Ld, and 100.0 did not express any detectable amounts of Kd, Dd, or Ld. These results indicate that K and D (and L) antigens can be expressed independently of each other and suggest that expression of class I antigens is controlled in a locus-specific manner.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology; D000951:Antigens, Neoplasm / Q000032:analysis* / Q000235:genetics; D002460:Cell Line; D005786:Gene Expression Regulation; D006183:H-2 Antigens / Q000032:analysis* / Q000235:genetics; D008223:Lymphoma / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C / Q000235:genetics / Q000276:immunology; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D006183:H-2 Antigens