Abstract
Objective To investigate the clinical significance autoimmune antibody in patients with lupus nephritis(LN).Methods ELISA assay was performed to examine anti-C1q antibody and anti-nucleus antibody;immunoblot assay was performed to examine anti-dsDNA antibody,anti-nucleosome antibody and anti-Sm antibody in sera of 38 patients with LN and 22 patients of system lupus erythemalosus without renal damage.Standard methods were uaed for laboratory testing.Results The positive rate of anti-C1q antibody,anti-dsDNA antibody,anti-nucleosome antibody,anti-Sm antibody and anti-nucleus antibody were significantly higher in LN than in controls(P＜0.01).AntiC1q antibody and anti-nucleus antibody were significantty higher in LN than in controls(P＜0.01,P＜0.05).Serum levels of anti-C1q antibody was positively correlated with SLEDAI score and the level of anti-nucleus antibody,but was negatively oorrelated with C3、 C4.Conclusion Anti-C1q antibody,anti-dsDNA antibody,anti-nucleosome antibody and anti-nucleus antibody are suggested to play a role in the pathogenesis of LN and can be used as diagnostic tools and disease activity markers. Key words: Lupus nephritis; Complement C1q; Antibodies,antinuclear
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