BACKGROUND: Our aim was to conduct an analytical validation in a routine laboratory setting of the cerb-B2/c-neu ELISA assay kit from Calbiochem used to measure the extracellular domain (ECD) of HER2/neu in the serum of breast cancer patients. MATERIALS AND METHODS: The evaluation was based on three different production lots used in a routine laboratory setting. The reference value was based on a population of 217 patients with breast cancer not overexpressing HER2. RESULTS: The detection limit, below that given by the manufacturer, was 0.34 ng ml(-1) and the quantification limit was 0.90 ng ml(-1). Reproducibility and repeatability were at least 95%, precision coefficients of variation varied between 6 and 8.5% and trueness measured by dilution tests and the standard additions method varied between 97 and 107%. The threshold was estimated at 5 ng ml(-1). CONCLUSION: This technique presents satisfactory levels of accuracy for routine laboratory use.
BACKGROUND: Our aim was to conduct an analytical validation in a routine laboratory setting of the cerb-B2/c-neu ELISA assay kit from Calbiochem used to measure the extracellular domain (ECD) of HER2/neu in the serum of breast cancerpatients. MATERIALS AND METHODS: The evaluation was based on three different production lots used in a routine laboratory setting. The reference value was based on a population of 217 patients with breast cancer not overexpressing HER2. RESULTS: The detection limit, below that given by the manufacturer, was 0.34 ng ml(-1) and the quantification limit was 0.90 ng ml(-1). Reproducibility and repeatability were at least 95%, precision coefficients of variation varied between 6 and 8.5% and trueness measured by dilution tests and the standard additions method varied between 97 and 107%. The threshold was estimated at 5 ng ml(-1). CONCLUSION: This technique presents satisfactory levels of accuracy for routine laboratory use.
Authors: LiNa Loo; Joseph A Capobianco; Wei Wu; Xiaotong Gao; Wan Y Shih; Wei-Heng Shih; Kambiz Pourrezaei; Matthew K Robinson; Gregory P Adams Journal: Anal Chem Date: 2011-03-30 Impact factor: 6.986