title: Definition of three species-specific monoclonal antibodies recognizing antigenic structures present on human embryonal carcinoma cells which undergo modulation during in vitro differentiation.
abstract: Three novel species-specific monoclonal antibodies 5.1.H, 8.7.D and 13.7.A raised against semi-purified detergent solubilized fractions of the Tera 1 embryonal carcinoma (EC) cell line are restricted in their in vitro distribution to undifferentiated human EC cell lines. Competition experiments have established that distinct antigenic specificities are seen by the 3 different monoclonal antibodies. All 3 antigens 5.1.H, 8.7.D and 13.7.A, defined by these monoclonal antibodies, undergo developmental regulation and cease to be expressed on Tera 2 clones 5 and 12 after retinoic-acid-induced differentiation and on LICR LON HT 39/7 cells after phorbol-ester-induced differentiation. These results taken together with the extremely limited in vivo tissue distribution of the defined antigens suggest that the 5.1.H, 8.7.D and 13.7.A monoclonal antibodies define distinct onco-foetal antigens.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000032:analysis*; D000918:Antibody Specificity; D000951:Antigens, Neoplasm / Q000276:immunology*; D002460:Cell Line; D054278:Embryonal Carcinoma Stem Cells; D000939:Epitopes / Q000032:analysis; D006801:Humans; D006825:Hybridomas / Q000276:immunology; D007158:Immunologic Techniques; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D009373:Neoplasms, Germ Cell and Embryonal / Q000276:immunology*; D014411:Neoplastic Stem Cells / Q000276:immunology; D013045:Species Specificity; D013724:Teratoma / Q000276:immunology
chemical_list: D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D000939:Epitopes