title: Shared idiotypes on anti-DNA and anti-poly (ADP-ribose) antibodies.
abstract: Hed 10 is a ssDNA-specific mAb derived from an NZB/W autoimmune mouse. ADP 1 is a poly(ADP-ribose)-specific mAb derived from a C57BL/6 mouse. Rabbit anti-idiotypic sera were raised against Hed 10 and ADP 1. By affinity chromatography it was shown that at least 20 to 30% of DNA-binding antibodies contained these idiotypes. The sera were also used to evaluate idiotypic cross-reactivity among 26 diverse, predominantly anti-nucleic acid, murine mAb. Each serum bound directly to several mAb and in addition inhibited the binding of several antibodies to their appropriate Ag. The anti-Hed 10 serum detected an idiotype which was restricted to antibodies that bound to poly(dT) and/or poly(ADP-ribose). The anti-ADP 1 serum detected a more widely distributed idiotype contained in antibodies which bound to a variety of nucleic acids. Although both sera bound directly to Hed 10, only the anti-Hed 10 serum could compete for the binding of Hed 10 to poly(dT). On the other hand, both sera could compete for the binding of ADP 1 to poly(ADP-ribose) as well as bind directly to ADP 1. In addition anti-ADP 1 serum appeared to enhance, rather than inhibit, the binding of one mAb to native calf thymus DNA and poly[d(AT)] but had no effect on the binding to several ssDNA. These results demonstrate that many antibodies which recognize DNA and poly(ADP-ribose) have shared idiotypes. This may be of relevance to the development of autoimmunity because poly(ADP-ribose) is ubiquitous and immunogenic.
authors.affiliation: Department of Medicine, College of Medicine, University of Saskatchewan, Saskatoon, Canada.
authors.forename: J T
authors.initials: JT
authors.lastname: Sibley
authors.forename: L J
authors.initials: LJ
authors.lastname: Latimer
authors.forename: J S
authors.initials: JS
authors.lastname: Lee
mesh_terms: D000818:Animals; D000974:Antibodies, Antinuclear / Q000032:analysis*; D000911:Antibodies, Monoclonal / Q000032:analysis*; D001666:Binding Sites, Antibody; D001667:Binding, Competitive; D004247:DNA / Q000276:immunology* / Q000378:metabolism; D007130:Immunoglobulin Idiotypes / Q000032:analysis* / Q000276:immunology; D007163:Immunosorbent Techniques; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D008814:Mice, Inbred NZB; D009702:Nucleoside Diphosphate Sugars / Q000276:immunology*; D011064:Poly Adenosine Diphosphate Ribose / Q000276:immunology* / Q000378:metabolism; D011817:Rabbits; D011863:Radioimmunoassay
chemical_list: D000974:Antibodies, Antinuclear; D000911:Antibodies, Monoclonal; D007130:Immunoglobulin Idiotypes; D009702:Nucleoside Diphosphate Sugars; D011064:Poly Adenosine Diphosphate Ribose; D004247:DNA