title: Naturally occurring antibodies to poly(ADP-ribose) in autoimmune MRL/Mp-lpr/lpr mice.
abstract: The presence of antibodies to poly(ADP-ribose) was demonstrated in the sera of MRL/Mp-lpr/lpr (MRL/l) mice by an enzyme linked immunosorbent assay (ELISA). Antibody to poly(ADP-ribose) was strongly inhibited by single stranded DNA (ssDNA) and poly(ADP-ribose), and less by double stranded DNA (dsDNA). Affinity purified anti-poly(ADP-ribose) antibodies bound more with immobilized ssDNA than with poly(ADP-ribose), and were significantly inhibited by soluble ssDNA, although poly(ADP-ribose) was the best soluble inhibitor. On the contrary, affinity purified anti-ssDNA antibodies bound best with ssDNA and significantly but less with poly(ADP-ribose); however, they were scarcely inhibited by poly(ADP-ribose). These results suggest that similar antigenic determinants exist in poly(ADP-ribose) and ssDNA. It is conceivable, however, at the present moment that 'naturally occurring antibodies to poly(ADP-ribose)' in MRL/l mice are subpopulations of anti-ssDNA antibodies that react equally well with poly(ADP-ribose) and ssDNA.
mesh_terms: D000818:Animals; D000974:Antibodies, Antinuclear / Q000032:analysis*; D000915:Antibody Affinity; D000918:Antibody Specificity; D004247:DNA / Q000276:immunology; D004277:DNA, Single-Stranded / Q000276:immunology; D004797:Enzyme-Linked Immunosorbent Assay; D008180:Lupus Erythematosus, Systemic / Q000276:immunology*; D051379:Mice; D009702:Nucleoside Diphosphate Sugars / Q000276:immunology*; D011064:Poly Adenosine Diphosphate Ribose / Q000276:immunology*
chemical_list: D000974:Antibodies, Antinuclear; D004277:DNA, Single-Stranded; D009702:Nucleoside Diphosphate Sugars; D011064:Poly Adenosine Diphosphate Ribose; D004247:DNA