title: Autoantibodies against oxidized low-density lipoprotein in antiphospholipid syndrome.
abstract: The prevalence and clinical significance of anti-oxidized low-density lipoprotein antibodies (anti-ox-LDL) were evaluated in patients with the antiphospholipid syndrome (APS). Anti-ox-LDL were measured in the sera of 107 patients with APS (64 primary APS, 43 secondary to systemic lupus erythematosus) by enzyme-linked immunosorbent assay (ELISA) utilizing malondialdehyde (MDA)-modified LDL as antigen. In the same patients, anticardiolipin antibodies (aCL) and anti-beta2-glycoprotein I antibodies (anti-beta2GPI) were also measured. A positive titre of anti-ox-LDL was detected in 22% of patients, but only in 6% of control subjects (chi2 = 12, P = 0.0005). Levels of anti-ox-LDL were higher in patients with arterial thrombosis (n = 58) than in those without (n = 49) (P = 0.0001). Anti-ox-LDL levels correlated weakly with those of aCL (r = 0.196, P = 0.043), but not with those of anti-beta2GPI (r = 0.076). Our findings suggest that elevated levels of anti-ox-LDL may represent another potential marker of APS, particularly of patients prone to arterial thrombosis.
authors.affiliation: Lupus/Arthritis Research Unit, The Rayne Institute, St Thomas' Hospital, London.
authors.forename: O
authors.initials: O
authors.lastname: Amengual
authors.forename: T
authors.initials: T
authors.lastname: Atsumi
authors.forename: M A
authors.initials: MA
authors.lastname: Khamashta
authors.forename: F
authors.initials: F
authors.lastname: Tinahones
authors.forename: G R
authors.initials: GR
authors.lastname: Hughes
mesh_terms: D000328:Adult; D000368:Aged; D016736:Antiphospholipid Syndrome / Q000150:complications / Q000276:immunology*; D001323:Autoantibodies / Q000097:blood*; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D008077:Lipoproteins, LDL / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D010084:Oxidation-Reduction; D013927:Thrombosis / Q000209:etiology / Q000276:immunology
chemical_list: D001323:Autoantibodies; D008077:Lipoproteins, LDL; C099252:oxidized low density lipoprotein