Journal
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
Volume 121, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.trac.2019.115699
Keywords
Aptamer; Aptamer engineering; Biosensor; Cooperativity; Detection; Dye-displacement; Enzyme-assisted target recycling; Exonuclease; Small molecule; Sensor
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Funding
- National Institutes of Health - National Institute on Drug Abuse [R15DA036821]
- National Institutes of Health - National Institute of Justice [2013-DN-BX-K032, 2015-R2-CX-0034, 2016-DN-BX0167]
- University Graduate School, Florida International University
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Aptamers are nucleic acid-based affinity reagents that have gained widespread attention as bio-recognition elements for the detection of targets such as ions, small molecules, and proteins. Over the past three decades, the field of aptamer-based sensing has grown considerably. However, the advancement of aptamer-based small-molecule detection has fallen short of the high demand for such sensors in applications such as diagnostics, environmental monitoring, and forensics. This is due to two challenges: the complexity of developing generalized sensing platforms and the poor sensitivities of assays targeting small molecules. This paper will review new approaches for the streamlined development of high-performance aptamer-based sensors for small-molecule detection. We here provide historical context, explore the current state-of-the art, and offer future directions-with emphasis placed on new aptamer engineering methods, the use of cooperative binding, and label-free approaches using fully-folded, high-affinity aptamers for small-molecule sensing. (c) 2019 Elsevier B.V. All rights reserved.
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