单克隆抗体
化学
链霉亲和素
抗体
量子点
表位
分子生物学
硝化棉
结合
荧光
共轭体系
生物物理学
生物素
生物化学
材料科学
生物
膜
纳米技术
物理
聚合物
免疫学
有机化学
量子力学
数学分析
数学
作者
Fabio Cimaglia,Alessandro Aliverti,Maurizio Chiesa,Palmiro Poltronieri,Enrico De Lorenzis,Angelo Santino,Leonardo A. Sechi
出处
期刊:Nanotechnology development
[PAGEPress Publications]
日期:2012-01-04
卷期号:2 (1): 5-5
被引量:19
摘要
A lateral flow (LF) device combined with quantum dots (QDs) technology was developed for rapid detection of a specific mycobacterial flavoprotein reductase (<em>fprA</em>). In order to develop the LF assay based on a double-antibody sandwich format, two monoclonal antibodies recognizing different epitopes located in separated <em>fprA</em> domains were identified. The first monoclonal antibody was immobilized onto the detection zone of a porous nitrocellulose membrane, whereas another monoclonal antibody was conjugated to QDs nanoparticles as a detection system. Using these monoclonal antibodies we recorded a good fluorescence signal, the intensity of which was directly proportional to the concentration of <em>fprA</em> protein. The use of antibodies conjugated with fluorescent semiconductor QDs via biotin-streptavidin bridge, allowed the detection of <em>fprA</em> protein at concentrations as low as 12.5 pg/μL in less than 10 min. The reported technology could be useful in the diagnostic investigation of <em>Mycobacterium tuberculosis</em> and other human pathogens in clinical specimens.
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