相关实验视频
Updated: Feb 7, 2026

06:52
Kinetic Screening of Nuclease Activity using Nucleic Acid Probes
Published on: November 1, 2019
8.7K
用DNA功能化染料装载的聚合物纳米粒子:用于扩大核酸检测的超明亮FRET平台
Nina Melnychuk1, Andrey S Klymchenko1
1Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Faculté de Pharmacie , Université de Strasbourg , Strasbourg CS 60024 , France.
Journal of the American Chemical Society
|August 2, 2018
概括
研究人员开发了用于增强光学生物传感的新型纳米粒子探测器. 这些探测器使用采光纳米天线和福斯特共振能量转移 (FRET) 来实现75倍的信号放大,大大提高了核酸的检测极限.
科学领域:
- 纳米技术
- 生物医学工程
- 分析化学
背景情况:
- 光学生物传感需要信号放大策略来增强灵敏度.
- 使用纳米粒子 (NP) 的弗斯特共振能量转移 (FRET) 是有前途的,但相对于弗斯特半径的NP大小受到限制.
- 现有的FRET探测器往往缺乏检测低丰度生物标志物的必要亮度和放大.
研究的目的:
- 开发一种基于FRET的新型纳米粒子探测器,
- 通过创建高效的采光纳米天线来克服传统FRET捐赠者的局限性.
- 通过超低的检测极限来实现特定序列的核酸检测.
主要方法:
- 制造40nm染料加载的聚甲基合甲基酸 (PMMA-MA) 纳米粒子 (采光纳米天线).
- 开发一种新的功能化方法,使用化/碳酸盐组进行无Cu点击合的寡核酸.
- 用表面移植的寡核酸作为FRET受体 (Cy5) 和纳米颗粒染料作为FRET供体 (rhodamine) 组装的纳米探针.
主要成果:
- 功能化的纳米天线显示出大约3200个胺捐赠者的巨大光收获.
- 与目标核酸 (幸存癌症标志物) 混合激发FRET,导致信号放大75倍.
- 纳米探测器实现了序列特定的两色比度响应,检测极限低至0.25 pM.
- 开发的生物传感器表现出前所未有的亮度,性能超过分子FRET探针2000倍,QDot-605的100倍.
结论:
- 开发的采光纳米天线FRET探测器克服了基于FRET的生物传感的基本局限性.
- 这种增强的传感概念显著提高了光探测器对生物分子目标的灵敏度和亮度.
- 这项技术有望推进癌症标志物和其他生物标志物的敏感和特定检测.
相关概念视频
Nucleic Acids
50.6K
Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes,...
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes,...
50.6K
Nucleic acids
190.0K
Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes,...
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes,...
190.0K
Nucleic Acids
9.0K
9.0K
Nucleic Acid Structure
9.2K
The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms a 5′ to 3′ phosphodiester linkage.
DNA Structure
DNA...
DNA Structure
DNA...
9.2K
Nucleic Acids and Nucleotides
14.8K
Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and have instructions for its functioning. The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Deoxyribonucleic Acid (DNA)
DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and the organelles such as chloroplasts and mitochondria....
Deoxyribonucleic Acid (DNA)
DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and the organelles such as chloroplasts and mitochondria....
14.8K
Biosynthesis of Nucleic Acids
1.1K
Nucleic acid biosynthesis is a fundamental biochemical process that produces the purine and pyrimidine nucleotides essential for DNA and RNA synthesis. This pathway maintains a balanced nucleotide pool, preventing imbalances that could jeopardize genetic integrity and cellular function. Given the crucial role of nucleotides, their synthesis is tightly regulated to ensure proper cellular homeostasis.Purine BiosynthesisThe biosynthesis of purine nucleotides begins with ribose-5-phosphate, a...
1.1K

