Nanoparticle-based bio-barcode assay for the detection of bluetongue virus

文献类型: 外文期刊

第一作者: Yin, Hui-qiong

作者: Yin, Hui-qiong;Jia, Min-xian;Yang, Shu;Zhang, Li-ying;Zhang, Qi-mo;Zhang, Jin-gang;Shi, Li-jun;Li, Gang;Wang, Shen-qi

作者机构:

关键词: Bluetongue virus;Bio-barcode assay;Real-time PCR;High-sensitivity detection

期刊名称:JOURNAL OF VIROLOGICAL METHODS ( 影响因子:2.014; 五年影响因子:2.001 )

ISSN: 0166-0934

年卷期: 2011 年 178 卷 1-2 期

页码:

收录情况: SCI

摘要: The ultrasensitive bio-barcode amplification assay (BCA) technique was developed for the specific detection of the outer-core protein VP7 of bluetongue virus (BTV). The target antigen VP7 was first captured by gold nanoparticles (GNPs) coated with polyclonal antibodies. Magnetic microparticles ( MMP) coated with VP7 monoclonal antibody were then added to form a sandwich immuno-complex. After the immuno-complex was formed, signal DNA annealed to DNA strands covalently bound to the GNPs were released by heating and characterized by PCR and real-time fluorescence PCR. A detection limit of 0.1 fg/ml was measured for purified VP7, seven orders of magnitude more sensitive than that of conventional antigen capture ELISA. The BCA demonstrated the same enhanced sensitivity for detecting BTV in serum samples from sheep. In the following work it is demonstrated that this assay is a highly sensitive method for the detection of BTV proteins that could be adapted to measure other proteins. (C) 2011 Elsevier B.V. All rights reserved.

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