功能核酸荧光免标记型定量统一化检测技术的研究进展

doi:10.13560/j.cnki.biotech.bull.1985.2018-0809

摘要/Abstract

摘要： 功能核酸是一类具有特定空间构象、执行特异生物功能的天然或者人工核酸序列,具有易于修饰、价格低廉、稳定性高、特异性强等优势,其搭载免标记荧光传感系统后,功能核酸可起到将多种靶物质统一转为较为稳定的核酸信号,以及通过核酸扩增对检测信号进行扩增等重要作用。而免标记荧光传感技术可以在检测中免去荧光标记时荧光、猝灭基团的筛选和标记过程的繁琐和成本,同时可保证与核酸的特异或非特异性结合后产生荧光信号变化。通过两种技术的优势结合,检测的灵敏度、实时性可进一步提高,逐渐被广泛应用于环境污染物检测、食品风险因子检测、疾病诊断等多个领域。首先明确功能核酸与荧光定量检测技术等相关概念,详细阐述了几种重要的荧光物质的特点以及其与功能核酸的分子识别、作用方式与发光机制,接着紧紧围绕该种传感技术的几个特点,从功能核酸荧光免标记型定量统一化检测技术与其实际应用角度进行分类介绍与评价对比,最后就功能核酸荧光免标记型定量统一化检测技术在多种领域的检测分析中的研究意义以及存在的问题进行讨论,并对未来的发展与应用作出展望。

关键词: 功能核酸, 免标记荧光, 定量检测, 生物传感器

Abstract: Functional nucleic acid is a natural or an artificial nucleic acid sequence with specific spatial conformation and biological function. It has advantages such as easy method to modify,low cost,high stability and strong specificity. After combined with label-free fluorescence biosensors,the functional nucleic acid performs the function of transferring all different kinds of targets to stable signals of nucleic acid and amplifying signals by the amplification of nucleic acid. In addition,the complexity of process and cost from labeling and screening of fluorescence,quenching groups in label-fluorescence can be avoided by the technology of label-free fluorescence,while the fluorescence signal transfer can be ensured by the specific or unspecific combination of nucleic acid and fluorescence. Combining the advantages of 2 technologies,the sensitivity and real-time capability can be enhanced,and the functional nucleic acid-based label-free fluorescence biosensors have been widely applied in the detection of environmental pollutants,risk factors of food safety,disease diagnosis,etc. Firstly,we define the concepts of functional nucleic acid and quantitative fluorescence detecting technology,and elaborate in detail the features of key fluorescent materials,as well as their biological molecular recognitions,reaction principles,and luminous models with functional nucleic acid. Then,we describe,assesse,and compare the quantitative and unitive detecting technologies of functional nucleic acid and label-free fluorescence and their applications according to their features. Finally,we discuss the research significance and issues of the quantitative and unitive detecting technologies of functional nucleic acid and label-free fluorescence in detections,and prospect the future development and application.

Key words: functional nucleic acid, label-free fluorescence, quantitative detection, biosensor

肖冰, 刘榜, 罗云波, 黄昆仑, 张园, 李夏莹, 张秀杰, 许文涛, 周翔. 功能核酸荧光免标记型定量统一化检测技术的研究进展[J]. 生物技术通报, 2019, 35(3): 194-202.

XIAO Bing, LIU Bang, LUO Yun-bo, HUANG Kun-lun, ZHANG Yuan, LI Xia-ying, ZHANG Xiu-jie, XU Wen-tao, ZHOU Xiang. Research Progress in Quantitative and Unitive Detecting Technologies of Functional Nucleic Acid and Label-Free Fluorescence[J]. Biotechnology Bulletin, 2019, 35(3): 194-202.

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