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黄金纳米粒子启用实时结合链反应,用于超敏感检测DNA
Wei Shen1, Huimin Deng, Zhiqiang Gao
1Department of Chemistry, National University of Singapore, Singapore 117543.
Journal of the American Chemical Society
|August 29, 2012
概括
这项研究介绍了一种简单的,超敏感的色度DNA测定方法,使用金纳米粒子 (AuNPs) 和结合链反应 (LCR). 该试验检测出具有20aM极限和10^3.3的选择性因子的DNA.
科学领域:
- 纳米技术 纳米技术
- 生物化学 生物化学
- 分子生物学分子生物学
背景情况:
- 颜色测量测试对于DNA检测至关重要.
- 结合链反应 (LCR) 放大特定的DNA序列.
- 黄金纳米粒子 (AuNPs) 为信号生成提供了独特的光学特性.
研究的目的:
- 开发一种简单而超敏感的色度DNA测定方法.
- 为了利用金纳米粒子 (AuNPs) 作为信号发生器在一个结合连锁反应 (LCR) 基于测试.
- 为了实现低检测极限和DNA检测的高选择性.
主要方法:
- 开发了一种色度测量DNA试验,将连接链反应 (LCR) 与金纳米颗粒 (AuNPs) 集成在一起.
- AuNPs被用作信号发生器,在LCR放大过程中经历绑定.
- 在成功的热循环和DNA放大后观察到实时颜色变化.
主要成果:
- 达到了对DNA的超敏感检测极限,即20原子分子 (aM).
- 展示了10^3的高选择性因子,区分了目标DNA与非目标序列.
- 测试显示出明显的实时颜色变化,表明DNA存在.
结论:
- 开发的测定方法简单,超敏感,并且对DNA检测有选择性.
- LCR和AuNPs的组合为色度DNA传感提供了一个强大的平台.
- 这种方法具有各种应用的潜力,需要敏感的DNA量化.
相关概念视频
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Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
DNA Isolation
DNA isolation protocols can be fast and straightforward or complex and time-consuming depending on the type and quality of DNA required for further processing. For example, plasmid DNA extraction is a bit more complicated than genomic DNA extraction because of the need for an appropriate lysis method to separate plasmid DNA from gDNA during isolation. However, for specific applications, such as long-range DNA sequencing that require a good yield of high- quality DNA samples, we need to follow...

