Clinical significance of anti-annexin V antibodies in patients with systemic lupus erythematosus.
Annexin V has a calcium-dependent binding affinity for anionic phospholipids and activated platelets, and prevents prothrombinase activity. We investigated the clinical significance of IgG anti-annexin V antibodies in patients with SLE. The study population consisted of 140 patients with SLE. Sera were examined for IgG anti-annexin V antibodies by ELISA. IgG anti-annexin V antibodies were detected in 27 of 140 patients (19%). Significantly higher incidences of arterial or venous thrombosis, intrauterine fetal loss, and prolonged activated partial thromboplastin time were found in patients with anti-annexin V antibodies than in those without anti-annexin V antibodies. Three patients with thrombosis were found not to have anticardiolipin antibodies, but to show sustained serological reactions for anti-annexin V antibodies, irrespective of prednisolone administration. These results indicated the clinical characteristics of SLE patients with anti-annexin V antibodies, and that these antibodies may be associated with the pathogenesis of thrombotic events.
Kaburaki
J
J
Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan.
Kuwana
M
M
Yamamoto
M
M
Kawai
S
S
Ikeda
Y
Y
D000328:Adult; D017304:Annexin A5 / Q000276:immunology*; D000906:Antibodies / Q000032:analysis / Q000276:immunology*; D005260:Female; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000150:complications / Q000276:immunology* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D013927:Thrombosis / Q000209:etiology / Q000276:immunology*
D017304:Annexin A5; D000906:Antibodies