Abstract
Golgi protein 73 (GP73) is an independent diagnostic indicator of cirrhosis. However, it lacks automatic detection techniques to meet the large-scale clinical requirement in physical examination. In this paper, an automatic approach was established based on the ACL2800 automatic chemiluminescent analyzer, using magnetic nanoparticles (MNPs) and chemiluminescence. This method depended on sandwich strategy among biotin-labeled capture monoclonal antibody, target GP73 and acridinium ester (AE)-labeled reporter monoclonal antibody, conjugation of streptavidin-labeled MNPs to biotin-labeled capture monoclonal antibody, and chemiluminescent detection of AE-linked targets. Optimal conditions were investigated and clinical assessment was processed. Detection of GP73 demonstrated a high sensitivity of 1.19 ng/mL with a wide range from 1.34 ng/mL to 684.38 ng/mL. The quantitative detection was achieved with the repeatability of 2.69%, the coefficient of variation of 3.55% and the percent recovery of 93.46%-107.82%. Therefore, an automatic quantitative detection method was successfully developed, which was a potential screening method in physical examination.
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