title: Serum levels of immunoglobulin and complement in giant-cell arteritis.
abstract: The levels of IgG, total complement, and complement factors C3 and C4 were elevated in serum from patients with giant-cell arteritis as compared to a control group of patients in the same range of age. No increase of the IgM concentration was found. The concentration of IgA was higher in men with giant-cell arteritis as compared to men in a control group. This increase of IgA was not seen in women. There were no statistically significant differences in any of the studied variables between those with a histologically verified arteritis on temporal biopsy specimens and those without.
mesh_terms: D000368:Aged; D003176:Complement C3 / Q000032:analysis; D003181:Complement C4 / Q000032:analysis; D003165:Complement System Proteins / Q000032:analysis*; D005260:Female; D013700:Giant Cell Arteritis / Q000097:blood / Q000276:immunology*; D006801:Humans; D007070:Immunoglobulin A / Q000032:analysis; D007074:Immunoglobulin G / Q000032:analysis*; D008297:Male; D008875:Middle Aged; D012737:Sex Factors
chemical_list: D003176:Complement C3; D003181:Complement C4; D007070:Immunoglobulin A; D007074:Immunoglobulin G; D003165:Complement System Proteins