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Title

Analytical and clinical performance of a new, automated assay panel for the diagnosis of antiphospholipid syndrome

Authors
Musial, J.
Arnout, J.
Published in Journal of Thrombosis and Haemostasis. 2010, vol. 8, no. 7, p. 1540-1546
Abstract SUMMARY BACKGROUND: Anticardiolipin (aCL) and anti-beta(2)glycoprotein I (abeta(2)GPI) antibodies are part of the criteria for antiphospholipid syndrome (APS). Therefore they are widely measured and about 30 commercial kits are available. OBJECTIVES: To investigate the analytical and clinical performances of four fully automated, chemiluminescent assays: HemosIL AcuStar aCL IgG, HemosIL AcuStar aCL IgM, HemosIL AcuStar abeta(2)GPI IgG, and HemosIL AcuStar abeta(2)GPI IgM. METHODS: Cut-off values were assessed by testing 250 blood donors. Total coefficients of variation (CV) were determined with six plasma pools and two controls ranging from 4.3 to 2694 U mL(-1) depending on the assay. Samples from 218 well-characterized patients and 103 controls were measured in three laboratories to determine inter-laboratory variation. The results of the 321 samples were compared with three commercial assays (REAADS, INOVA and VARELISA). RESULTS: Cut-off values were assigned to 20 arbitrary units for all the tests. Total CV ranged from 4.3 to 11.2%. No interference of hemoglobin, bilirubin, triglycerides, heparins and rheumatoid factor was observed. Inter-laboratory variability was low and no sample changed status. Overall status agreement between HemosIL assays and the comparator kits ranged from 82 to 96%. Sensitivity, specificity, agreement when predicting APS and the odds ratios when predicting a thrombotic or obstetric event gave comparable results between HemosIL AcuStar and the three other assays. CONCLUSIONS: Our study demonstrates that the fully automated HemosIL AcuStar aPL assay panel showed similar performances to the three commercial ELISAs commonly used by various laboratories to detect antiphospholipid antibodies.
Keywords Antibodies, Antiphospholipid/*bloodAntiphospholipid Syndrome/*diagnosisFemaleHumansLuminescent Measurements/standardsMaleObserver VariationPredictive Value of TestsPregnancyPregnancy Complications, HematologicReagent Kits, Diagnostic/*standardsReproducibility of ResultsSensitivity and SpecificityThrombosis
Identifiers
PMID: 20345724
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Research group Anticorps antiphospholipides (12)
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DE MOERLOOSE, Philippe et al. Analytical and clinical performance of a new, automated assay panel for the diagnosis of antiphospholipid syndrome. In: Journal of Thrombosis and Haemostasis, 2010, vol. 8, n° 7, p. 1540-1546. https://archive-ouverte.unige.ch/unige:21199

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Deposited on : 2012-05-23

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