Affiliation:
1. College of Biological and Pharmaceutical Sciences China Three Gorges University 443002 Yichang Hubei P. R. China
2. Research Institute of Shenzhen Wuhan University 518057 Shenzhen Guangdong P. R. China
3. College of Chemistry and Molecular Sciences Wuhan University 430072 Wuhan Hubei P. R. China
Abstract
AbstractThe isothermal enzyme‐free nucleic acid amplification method plays an indispensable role in biosensing by virtue of its simple, robust, and highly efficient properties without the assistance of temperature cycling or/and enzymatic biocatalysis. Up to now, enzyme‐free nucleic acid amplification has been extensively utilized for biological assays and has achieved the highly sensitive detection of various biological targets, including DNAs, RNAs, small molecules, proteins, and even cells. In this Review, the mechanisms of entropy‐driven reaction, hybridization chain reaction, catalytic hairpin assembly and DNAzyme are concisely described and their recent application as biosensors is comprehensively summarized. Furthermore, the current problems and the developments of these DNA circuits are also discussed.
Funder
National Natural Science Foundation of China