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Recent advances in DNA walker machines and their applications coupled with signal amplification strategies: A critical review

期刊

ANALYTICA CHIMICA ACTA
卷 1171, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.aca.2021.338523

关键词

DNA walker; Biosensors; Multiple dimensional tracks; Signal amplification strategies; Hyphenated techniques

资金

  1. National Natural Science Foundation of China [201874022, 21675029]
  2. Natural Science Foundation of Fujian Province [2020J05182]
  3. Nature Science Foundation of Fujian Education Department [JT180322]
  4. Key Laboratory for Analytical Science of Food Safety and Biology, Ministry of Education [FS2012]
  5. Fujian University of Technology [GY-Z18042]

向作者/读者索取更多资源

DNA walkers, as dynamic nanomachines, move along multiple dimensional tracks powered by various driving forces, with characteristics of high efficiency, flexibility, and directionality, widely applied in biosensing, material assembly, and early cancer diagnosis. Furthermore, DNA walkers can be combined with different amplification approaches to enhance signal transduction and amplify biosensor sensing signals.
DNA walkers, a type of dynamic nanomachines, have become the subject of burgeoning research in the field of biology. These walkers are powered by driving forces based on strand displacement reactions, protein enzyme/DNAzyme reactions and conformational transitions. With the unique properties of high directionality, flexibility and efficiency, DNA walkers move progressively and autonomously along multiple dimensional tracks, offering abundant and promising applications in biosensing, material assembly and synthesis, and early cancer diagnosis. Notably, DNA walkers identified as signal amplifiers can be combined with various amplification approaches to enhance signal transduction and amplify biosensor sensing signals. Herein, we systematically and comprehensively review the walking principles of various DNA walkers and the recent progress on multiple dimensional tracks by presenting representative examples and an insightful discussion. We also summarized and categorized the diverse signal amplification strategies with which DNA walkers have coupled. Finally, we outline the challenges and future trends of DNA walker machines in emerging analytical fields. (c) 2021 Elsevier B.V. All rights reserved.

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