Abstract
A micro-plate magnetic chemiluminescence immunoassay was developed for rapid and high throughput detection of carcinoembryonic antigens (CEA) in human sera. This method was based on a sandwich immunoreaction of fluorescein isothiocyanate (FITC)-labeled anti-CEA antibodies, CEA antigens, and horseradish peroxidase (HRP)-conjugated anti-CEA antibodies in micro-plate. The immunomagnetic particles coated with anti-FITC antibodies were used as the solid phase for the immunoassay. The separation procedure was carried out by a magnetic plate adaptor and the luminol-hydrogen peroxide (H2O2)-HRP system was employed for the chemiluminescence detection. The proposed method combined the advantages of the micro-plate reactor and magnetic particle separation technology with the linear range of 5–250 ng·mL−1. The detection limit of CEA was 0.61 ng·mL−1. The coefficient of the variation was less than 7% and 13% for intra-assay and inter-assay precision, respectively. Compared with the commercial micro-plate chemiluminescent kit, the proposed method showed a good correlation.
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Support from the CAS Major Scientific Research and Equipment Development Projects (YZ-0632), the National Natural Science Founolation of China (Grant No. 20907060), the CAS Graduate Innovation Foundation (No. YXLW-3), the National key Technology R&D Program (Grant No. 2006BAF07B03-1-1) and Shaanxi Province, China’s Scholarship Council (Grant No. 08JK482)
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Li, Z., Zhang, Q., Zhao, L. et al. Micro-plate magnetic chemiluminescence immunoassay and its applications in carcinoembryonic antigen analysis. Sci. China Chem. 53, 812–819 (2010). https://doi.org/10.1007/s11426-009-0168-y
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DOI: https://doi.org/10.1007/s11426-009-0168-y