Biotechnology Bulletin ›› 2019, Vol. 35 ›› Issue (3): 194-202.doi: 10.13560/j.cnki.biotech.bull.1985.2018-0809

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Research Progress in Quantitative and Unitive Detecting Technologies of Functional Nucleic Acid and Label-Free Fluorescence

XIAO Bing1, LIU Bang2, LUO Yun-bo1,3, HUANG Kun-lun1,3, ZHANG Yuan1, LI Xia-ying4, ZHANG Xiu-jie4, XU Wen-tao1,3, ZHOU Xiang2   

  1. 1. College of Food Science and Nutritional Engineering,China Agricultural University,Beijing 100083;
    2. Key Laboratory of Agricultural Animal Genetics,Breeding and Reproduction of the Ministry of education,Huazhong Agricultural University,Wuhan 430070;
    3. Key Laboratory of Safety Assessment of Genetically Modified Organism(Food Safety),the Ministry of Agriculture and Rural Affairs of P.R. China,Beijing 100083;
    4. Department Center for Science and Technology,the Ministry of Agriculture and Rural Affairs of P. R.China,Beijing 100122
  • Received:2018-09-19 Online:2019-03-26 Published:2019-04-03

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