title: Murine T cell-specific Ia antigens: monoclonal antibodies define an I-A-encoded T lymphocyte structure.
abstract: T lymphocytes express a unique I-A subregion-controlled surface molecule that is not expressed on B lymphocytes. We produced antisera and monoclonal antibodies recognizing this structure. Exhaustive B cell adsorption (A.TH X B10.HTT)F antiserum, produced against activated A.TL T cells, left antibodies that bind an I-Ak specificity on some B10.A(4R) T lymphocytes (11 +/- 2%, mean +/- SEM). Similarly, exhaustive B cell adsorption of (A/J X B10.MBR)F antiserum, produced against activated B10.A(5R) cells, left antibodies specific for an I-Ab determinant on B10.A(5R)T cells (17 +/- 2%). We fused A.TL-immune (A.TH X B10.HTT)F splenocytes with NS-1 myeloma cells and identified antibody-producing hybrid cells by a fluorescent enzyme-linked immunosorbent microassay described herein. Eight monoclonal antibodies were selected; these lyse 7--26% of peripheral T cells from I-Ak strains. Thymocytes and bone marrow cells do not express the I-Ak T cells determinant. Exhaustive B cell adsorption did not remove I-Ak T cell-specific monoclonal antibodies.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal; D000954:Antigens, Surface / Q000032:analysis; D001402:B-Lymphocytes / Q000276:immunology; D002454:Cell Differentiation; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D000949:Histocompatibility Antigens Class II / Q000235:genetics / Q000276:immunology*; D008285:Major Histocompatibility Complex; D008297:Male; D051379:Mice; D013601:T-Lymphocytes
chemical_list: D000911:Antibodies, Monoclonal; D000954:Antigens, Surface; D000949:Histocompatibility Antigens Class II