Anti-?_2-glycoprotein Ⅰ antibodies in patients with systemic lupus erythematosus / 中华风湿病学杂志

ABSTRACT

Objective To investigate the prevalence and significance of anti-?2-glycoprotein Ⅰ (anti-?2-GPⅠ) in patients with systemic lupus erythematosus (SLE). Methods Anti-?2-GPⅠ level was determined in 112 SLE patients, 40 patients with rheumatoid arthritis (RA), 30 patients with Sj?gren′s syndrome (SS) and 40 healthy individuals by enzyme-linked immunosorbent assay (ELISA). The laboratory and clinical features (thrombosis, fetal loss, etc) were analyzed retrospectively from the clinical database. Results Sensitivities of anti-?2-GPⅠ were 21.4%, 15.0%, 6.7% in SLE, RA and SS, respectively. The specificity of anti-?2-GPⅠ was 88.6% in SLE. Correlations between thrombosis and titers of ACL-IgG/IgM and anti-?2-GPⅠ were statistically significant. No association was found between anti-?2-GPⅠ and other clinical and laboratory features. Conclusion The results indicate that anti-?2-glycoprotein Ⅰ antibodies are common and may play a role in SLE with thrombosis. Combination of ACL and anti-?2-GPⅠ can facilitate the diagnosis of SLE with thrombosis.