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Evaluation of the ARCHITECT urine NGAL assay: assay performance, specimen handling requirements and biological
Frank C Grenier1, Salman Ali, Hina Syed
1Abbott Laboratories, D-9ML, AP20, 100 Abbott Park Road, Abbott Park, IL 60064, USA. frank.grenier@abbott.com
Objectives:
NGAL (Neutrophil Gelatinase-Associated Lipocalin) has emerged as a new biomarker for the identification of acute kidney injury. Reliable clinical evaluations require a simple, robust test method for NGAL, and knowledge of specimen handling and specimen stability characteristics. We evaluated the performance of a new urine NGAL assay on the ARCHITECT analyzer.
Methods:
Assay performance characteristics were evaluated using standard protocols. Urine specimen storage requirements were determined and biological variability was assessed in a self-declared apparently healthy population.
Results:
Assay performance data showed good precision, sensitivity and lot-to-lot reproducibility. There was good short term 2-8 degrees C sample stability, however, long term storage samples must be kept at -70 degrees C or colder. The largest variance component in a biological variance study was within-day.
Conclusions:
The ARCHITECT NGAL assay proved to be a precise and reproducible assay for the determination of urine NGAL.
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