Biotechnology Bulletin ›› 2020, Vol. 36 ›› Issue (1): 182-192.doi: 10.13560/j.cnki.biotech.bull.1985.2019-0568

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Research Progress on RNA-cleaving DNAzyme in the Detection of Pathogens

WANG Xin1,2, ZHU Long-jiao1, XU Wen-tao1,3, ZHAI Chen4, WANG Shu-ya4, HUANG Wei-xia4   

  1. 1. College of Food Science and Nutritional Engineering,China Agricultural University,Beijing 100083;
    2. Beijing Advanced Innovation Center for Food Nutrition and Human Health of China Agricultural University,Beijing 100083;
    3. Key Laboratory of Safety Assessment of Genetically Modified Organism(Food Safety),Ministry of Agriculture,Beijing 100083;
    4. Nutrition & Health Research Institute,COFCO Corporation,Beijing Key Laboratory of Nutrition & Health and Food Safety,Beijing Engineering Laboratory for Geriatric Nutrition Food Research,Beijing Livestock Product Quality and Safety Source Control Engineering Technology Research Center,Beijing 102209;
  • Received:2019-06-22 Online:2020-01-26 Published:2020-01-08

Abstract: DNA is an important carrier of genetic information,and its folding property of spatial conformation makes it have many functions. Using a RNA-cleaving DNAzyme to recognize a specific single-stranded DNA molecule and to cleave one of the single strands,a signal output sensor can be constructed,which converts the specific recognition process into the signal outputs of gel electrophoresis character,fluorescence,and colorimetric,and it can be combined with amplification reaction to achieve signal amplified. RNA-cleaving DNAzymes are obtained by in vitro screening techniques that specifically bind to target substances(such as small molecules,proteins,and even whole cells). Due to its advantages of convenient preparation,easy modification and fine stability,RNA-cleaving DNAzymes are used to construct biosensors to detect pathogenic microorganisms,for example in-situ detection and even in-vivo detection in medical treatment. In the future,it will be combined with mature detection,for instance,equipment blood glucose meter,cross-flow chromatography strips for microbiological testing. Furthermore,it can be used in important areas such as biosensing,food safety,and medical care. Here we review the application of RNA-cleaving DNAzymes in microbial detection. In addition,we discuss the mechanism,products,targets and characterization of RNA-cleaving DNAzymes in microbial detection,as well as the significance and problems of RNA-cleaving DNAzymes in the actual detection of microorganisms. Finally,we prospect the further application of this technology,aiming at the better development of nucleic acid cleavage enzymes in microbial detection.

Key words: RNA-cleaving DNAzymes, microorganism, biosensing, signal amplification, detection