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Capture-SELEX: Selection Strategy, Aptamer Identification, and Biosensing Application

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BIOSENSORS-BASEL
卷 12, 期 12, 页码 -

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MDPI
DOI: 10.3390/bios12121142

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nucleic acid aptamer; DNA and RNA Capture-SELEX; small molecule contaminant; characterization; aptamer; biosensing applications

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Small-molecule contaminants pose a great threat to human health and the environment, emphasizing the importance of developing affordable, user-friendly, and portable biosensors for rapid detection. This review summarizes the recent strategies used for Capture-SELEX and discusses the commonly used methods for detecting and characterizing small-molecule-aptamer interactions. The development of aptamer-based biosensors for various applications is also explored, along with the challenges and future possibilities in this field.
Small-molecule contaminants, such as antibiotics, pesticides, and plasticizers, have emerged as one of the substances most detrimental to human health and the environment. Therefore, it is crucial to develop low-cost, user-friendly, and portable biosensors capable of rapidly detecting these contaminants. Antibodies have traditionally been used as biorecognition elements. However, aptamers have recently been applied as biorecognition elements in aptamer-based biosensors, also known as aptasensors. The systematic evolution of ligands by exponential enrichment (SELEX) is an in vitro technique used to generate aptamers that bind their targets with high affinity and specificity. Over the past decade, a modified SELEX method known as Capture-SELEX has been widely used to generate DNA or RNA aptamers that bind small molecules. In this review, we summarize the recent strategies used for Capture-SELEX, describe the methods commonly used for detecting and characterizing small-molecule-aptamer interactions, and discuss the development of aptamer-based biosensors for various applications. We also discuss the challenges of the Capture-SELEX platform and biosensor development and the possibilities for their future application.

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