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http://hdl.handle.net/10397/96579
Title: | Phoxim-specific DNA aptamer screening, characterization and application in a multiple complementary strands fluorescent aptasensor | Authors: | Guo, W Wei, D Chow, FWN Leung, PHM Wang, H Cai, L Hori, M Chen, Z Li, S Deng, Y |
Issue Date: | 2022 | Source: | Smart materials in medicine, 2022, v. 3, p. 289-296 | Abstract: | In order to develop a fluorometric aptamer-based biosensor for ultrasensitive and selective detection of phoxim, a modified magnetic beads-systematic evolution of ligands by exponential enrichment (MB-SELEX) method was used in this study to select phoxim aptamer. An aptamer (APT3) that bonded to phoxim with high affinity was obtained after 15 rounds of selection, which had dissociation constant (Kd) of 0.93 ± 0.25 μM. A fluorometric aptasensor was then developed and enhanced the sensitivity and selectivity of phoxim detection based on APT3, multi-complementary strands (CS) and gold nanoparticles (AuNPs). This method had a good linear range of 0.05–5 μM, and detection limit was as low as 29.69 nM for phoxim. In addition, the aptasensing specifically captured phoxim in a variety of pesticides and real samples. The herein results proved that the method can be applied in practical detection. | Keywords: | Aptamer Detection Fluorescence aptasensor Phoxim SELEX |
Publisher: | Ke Ai Publishing Communications Ltd. | Journal: | Smart materials in medicine | EISSN: | 2590-1834 | DOI: | 10.1016/j.smaim.2022.03.003 | Rights: | © 2022 The Authors. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). The following publication Guo, W., Wei, D., Chow, F. W. N., Leung, P. H. M., Wang, H., Cai, L., ... & Deng, Y. (2022). Phoxim-specific DNA aptamer screening, characterization and application in a multiple complementary strands fluorescent aptasensor. Smart Materials in Medicine, 3, 289-296 is available at https://doi.org/10.1016/j.smaim.2022.03.003. |
Appears in Collections: | Journal/Magazine Article |
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