title: Mimicry of the Hodgkin-associated IRAC antigen by an anti-idiotype network: potential use in active immunotherapy of Hodgkin's lymphoma.
abstract: The murine monoclonal antibody anti-IRac, defining a surface-antigen structure (MW 70 kDa) on Hodgkin-Reed-Sternberg and interdigitating reticulum cells, was used to generate a cascade of anti-idiotypic antibodies as well as a cellular immunity against Hodgkin-Reed-Sternberg cells in syngeneic BALB/c-mice. The anti-idiotypic antibody monoclonal antibody 4B4 demonstrated characteristics of an "internal image" or network antibody (Ab2 beta). Ab2 beta 4B4 bound specifically to anti-IRac and inhibited anti-IRac-binding to antigen-bearing cells effectively. 4B4 induced an IRac-specific humoral polyclonal immune response in BALB/c-mice and New Zealand white rabbits as judged by Flow cytometric and histochemical analysis. Moreover, BALB/c-mice immunized with 4B4 showed statistically significant (p > 0.01) delayed-type hypersensitivity reaction against IRac-expressing Hodgkin cell-lines. Ab2 beta 4B4 induced in syngeneic BALB/c mice a monoclonal anti-anti-idiotypic antibody (Ab3) termed 3G10, which mimicked the specificities of Ab1 anti-IRac and thus confirms the internal image nature of Ab2 beta 4B4. The anti-idiotype-induced tumor cell specific T- and B-cell mediated immune response even across species barriers via the Hodgkin related IRac-antigen may play an important part in active specific immunotherapy of Hodgkin's disease.
authors.affiliation: Klinik I für Innere Medizin, Universität zu Köln, Germany.
authors.forename: I
authors.initials: I
authors.lastname: Schobert
authors.forename: C
authors.initials: C
authors.lastname: Renner
authors.forename: M
authors.initials: M
authors.lastname: Pfreundschuh
authors.forename: V
authors.initials: V
authors.lastname: Diehl
authors.forename: C
authors.initials: C
authors.lastname: Pohl
mesh_terms: D000818:Animals; D000888:Antibodies, Anti-Idiotypic / Q000096:biosynthesis / Q000276:immunology*; D000911:Antibodies, Monoclonal / Q000276:immunology* / Q000378:metabolism / Q000627:therapeutic use*; D000912:Antibodies, Neoplasm / Q000096:biosynthesis; D000918:Antibody Specificity; D000937:Antigen-Antibody Reactions; D000951:Antigens, Neoplasm / Q000276:immunology* / Q000378:metabolism; D000954:Antigens, Surface / Q000276:immunology*; D006689:Hodgkin Disease / Q000276:immunology* / Q000628:therapy*; D006801:Humans; D007150:Immunohistochemistry; D016233:Immunotherapy, Active; D051379:Mice; D008807:Mice, Inbred BALB C; D011817:Rabbits
chemical_list: D000888:Antibodies, Anti-Idiotypic; D000911:Antibodies, Monoclonal; D000912:Antibodies, Neoplasm; D000951:Antigens, Neoplasm; D000954:Antigens, Surface