Fluorescence polarization gene assay for HIV-DNA based on the use of dendrite-modified gold nanoparticles acting as signal amplifiers

Fluorescence polarization gene assay for HIV-DNA based on the use of dendrite-modified gold nanoparticles acting as signal amplifiers
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基于使用树突修饰金纳米颗粒作为信号放大器的 HIV-DNA 荧光偏振基因测定

DOI:
10.1007/s00604-018-2673-1
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发表时间:
2018-01
期刊:
Microchimica Acta (2018) 185:19
影响因子:
--
通讯作者:
Zhao Shulin
Zhao Shulin
中科院分区:
其他
文献类型:
--
作者:
Liang Shuiping;He Guicheng;Tian Jianniao;Zhao Yanchun;Zhao Shulin

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作者描述了用于HIV-DNA的荧光偏振测定。它是基于使用的金纳米粒子(金纳米粒子)与DNA树突状大分子,作为信号放大器的修改。在HIV-DNA存在下,AuNP-DNA树枝状大分子和荧光标记的DNA探针以夹心形式与HIV-DNA结合联合收割机以形成缀合物。由于分子量和体积的增加,该反应减慢了标记的DNA探针的旋转速度。这增加了荧光偏振和系统的灵敏度。相对荧光偏振值在150 pM至6 nM HIV-DNA浓度范围内线性增加,检测限为73 pM。结果表明,这种扩增策略是最有用的超灵敏测定寡核苷酸的荧光偏振means.Graphical abstractionSchematic一种新的荧光偏振检测HIV-DNA。利用金纳米粒子-DNA树枝状大分子作为信号放大因子实现了超灵敏检测。
The authors describe a fluorescence polarization assay for HIV-DNA. It is based on the use of gold nanoparticles (AuNPs) modified with DNA dendritic macromolecules that act as signal amplifiers. In the presence of HIV-DNA, the AuNP-DNA dendritic macromolecules and fluorescently labeled DNA probe combine with HIV-DNA in a sandwich format to form a conjugate. This reaction slows down the rotational speed of the labeled DNA probe because of the increase of molecular weight and volume. This increases fluorescence polarization and the sensitivity of the system. The relative fluorescence polarization values increase linearly in the 150 pM to 6 nM HIV-DNA concentration range, with a 73 pM detection limit. The results show this amplification strategy to be most useful for ultrasensitive determination of oligonucleotides by means of fluorescence polarization.Graphical abstractSchematic of a novel fluorescence polarization assay for the HIV-DNA. Ultrasensitive detection is accomplished by using AuNP-DNA dendritic macromolecules as signal amplification factor.
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