Detection of antiphospholipid antibodies by automated chemiluminescence assay

Antonella Capozzi, Emanuela Lococo, Maria Grasso, Agostina Longo, Tina Garofalo, Roberta Misasi, Maurizio Sorice

Research output: Contribution to journalArticle

Abstract

The laboratory diagnosis of antiphospholipid antibody syndrome (APS) requires the demonstration of antiphospholipid antibodies (aPL) by lupus anticoagulant (LAC) measured through coagulation assays, anticardiolipin IgG or IgM antibodies (aCL) and/or anti-β2-glycoprotein I IgG or IgM antibodies (anti-β2-GPI), usually detected by ELISA.In this study we tested aCL by a new automated system using the chemiluminescence principle.Our results showed that, while almost all the sera from APS patients, positive for IgG aCL and anti-β2-GPI by ELISA, were also positive for IgG aCl by chemiluminescence, only 30.13% of patients without clinical manifestations of APS, but positive for aCL and persistently negative for anti-β2-GPI (by ELISA) and LA, confirmed the positive test by chemiluminescence. This difference was highly significant (p<0.0001). Interestingly, this test also prompted to identify 20% of patients positive for LA, but persistently negative for both aCL and anti-β2-GPI IgG (ELISA).Thus, the new technology of automated chemiluminescence assay for measuring aPL may represent an useful tool to identify "true" APS patients.

Original languageEnglish
Pages (from-to)48-52
Number of pages5
JournalJournal of Immunological Methods
Volume379
Issue number1-2
DOIs
Publication statusPublished - May 31 2012

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Keywords

  • Anti-beta2 glycoprotein I antibodies
  • Anticardiolipin antibodies
  • Antiphospholipid syndrome
  • Lupus anticoagulant
  • Thrombosis
  • Zenit RA analyzer

ASJC Scopus subject areas

  • Immunology
  • Immunology and Allergy

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