title: Digital ulcers/gangrene and immunoglobulin classes/complement fixation of anti-dsDNA in systemic lupus erythematosus patients.
abstract: The immunoglobulin classes/complement fixation of anti-dsDNA were studied in sera obtained from 17 systemic lupus erythematosus (SLE) patients with digital ulcers and/or gangrene (Group A); 13 SLE patients with leg ulcer, peripheral neuropathy or livedo (Group B); 24 SLE patients with Raynaud's phenomenon (Group C); and 18 SLE patients with active lupus nephritis (Group D). Antibodies to dsDNA of IgG and IgA classes were commonly present (often in high titers) in Groups A and D. However, complement fixation of anti-dsDNA was more common in Group D than in any of the other 3 groups.
mesh_terms: D000974:Antibodies, Antinuclear / Q000032:analysis; D000936:Antigen-Antibody Complex / Q000032:analysis; D003165:Complement System Proteins / Q000032:analysis; D004247:DNA / Q000276:immunology; D005260:Female; D005734:Gangrene / Q000276:immunology*; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000276:immunology*; D008297:Male; D012883:Skin Ulcer / Q000276:immunology*
chemical_list: D000974:Antibodies, Antinuclear; D000936:Antigen-Antibody Complex; D003165:Complement System Proteins; D004247:DNA