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Choi SH, Lee JS, Choi WJ, Seo JW, Choi SJ. Nanomaterials for IoT Sensing Platforms and Point-of-Care Applications in South Korea. SENSORS (BASEL, SWITZERLAND) 2022; 22:610. [PMID: 35062576 PMCID: PMC8781063 DOI: 10.3390/s22020610] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/07/2022] [Accepted: 01/08/2022] [Indexed: 05/03/2023]
Abstract
Herein, state-of-the-art research advances in South Korea regarding the development of chemical sensing materials and fully integrated Internet of Things (IoT) sensing platforms were comprehensively reviewed for verifying the applicability of such sensing systems in point-of-care testing (POCT). Various organic/inorganic nanomaterials were synthesized and characterized to understand their fundamental chemical sensing mechanisms upon exposure to target analytes. Moreover, the applicability of nanomaterials integrated with IoT-based signal transducers for the real-time and on-site analysis of chemical species was verified. In this review, we focused on the development of noble nanostructures and signal transduction techniques for use in IoT sensing platforms, and based on their applications, such systems were classified into gas sensors, ion sensors, and biosensors. A future perspective for the development of chemical sensors was discussed for application to next-generation POCT systems that facilitate rapid and multiplexed screening of various analytes.
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Affiliation(s)
- Seung-Ho Choi
- Division of Materials of Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea; (S.-H.C.); (J.-S.L.); (W.-J.C.); (J.-W.S.)
| | - Joon-Seok Lee
- Division of Materials of Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea; (S.-H.C.); (J.-S.L.); (W.-J.C.); (J.-W.S.)
| | - Won-Jun Choi
- Division of Materials of Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea; (S.-H.C.); (J.-S.L.); (W.-J.C.); (J.-W.S.)
| | - Jae-Woo Seo
- Division of Materials of Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea; (S.-H.C.); (J.-S.L.); (W.-J.C.); (J.-W.S.)
| | - Seon-Jin Choi
- Division of Materials of Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea; (S.-H.C.); (J.-S.L.); (W.-J.C.); (J.-W.S.)
- Institute of Nano Science and Technology, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea
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Gao J, Chang Z, Tian R, Li P, Ahmad F, Jia X, Liang Q, Zhao X. Reversible and site-specific immobilization of β 2-adrenergic receptor by aptamer-directed method for receptor-drug interaction analysis. J Chromatogr A 2020; 1622:461091. [PMID: 32376022 DOI: 10.1016/j.chroma.2020.461091] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 03/23/2020] [Accepted: 03/29/2020] [Indexed: 10/24/2022]
Abstract
Immobilized protein makes a profound impact on the development of assays for drug discovery, diagnosis and in vivo biological interaction analysis. Traditional methods are enormously challenged by the G-protein coupled receptor ascribed to the loss of receptor functions. We introduced a β2-adrenergic receptor (β2-AR) aptamer into the immobilization of the receptor. This was achieved by mixing the receptor conjugated silica gel with cell lysates containing the receptor. We found that the aptamer-directed method makes immobilized β2-AR good stability in seven days and high specificity of ligand recognition at the subtype receptor level. Feasibility of the immobilized β2-AR in drug-receptor interaction analysis was evaluated by injection amount-dependent method, nonlinear chromatography, and peak decay analysis. Salbutamol, methoxyphenamine, ephedrine hydrochloride, clorprenaline, tulobuterol, bambuterol, propranolol and ICI 118551 bound to the receptor through one type of binding sites. The association constants presented good agreement within the three methods but exhibited clear differences from the data by radio-ligand binding assay. Regarding these results, we concluded that the aptamer-directed method will probably become an alternative for reversible and site-specific immobilization of GPCRs directly from complex matrices; the immobilized receptor is qualitative for drug-receptor interaction analysis.
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Affiliation(s)
- Juan Gao
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Ministry of Life Sciences and Medicine, Northwest University, Xi'an710069, China
| | - Zhongman Chang
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Ministry of Life Sciences and Medicine, Northwest University, Xi'an710069, China
| | - Rui Tian
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Ministry of Life Sciences and Medicine, Northwest University, Xi'an710069, China
| | - Ping Li
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Ministry of Life Sciences and Medicine, Northwest University, Xi'an710069, China
| | - Faizan Ahmad
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Ministry of Life Sciences and Medicine, Northwest University, Xi'an710069, China
| | - Xiaoni Jia
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Ministry of Life Sciences and Medicine, Northwest University, Xi'an710069, China; Department of Pharmacy, Xi'an Mental Health Center, Xi'an 710061, China
| | - Qi Liang
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Ministry of Life Sciences and Medicine, Northwest University, Xi'an710069, China; College of Chemistry & Chemical Engineering, Xi'an Shiyou University, Xi'an 710065, China
| | - Xinfeng Zhao
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Ministry of Life Sciences and Medicine, Northwest University, Xi'an710069, China.
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Fluorescence Sensing Using DNA Aptamers in Cancer Research and Clinical Diagnostics. Cancers (Basel) 2017; 9:cancers9120174. [PMID: 29261171 PMCID: PMC5742822 DOI: 10.3390/cancers9120174] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 12/14/2017] [Accepted: 12/16/2017] [Indexed: 12/12/2022] Open
Abstract
Among the various advantages of aptamers over antibodies, remarkable is their ability to tolerate a large number of chemical modifications within their backbone or at the termini without losing significant activity. Indeed, aptamers can be easily equipped with a wide variety of reporter groups or coupled to different carriers, nanoparticles, or other biomolecules, thus producing valuable molecular recognition tools effective for diagnostic and therapeutic purposes. This review reports an updated overview on fluorescent DNA aptamers, designed to recognize significant cancer biomarkers both in soluble or membrane-bound form. In many examples, the aptamer secondary structure switches induced by target recognition are suitably translated in a detectable fluorescent signal using either fluorescently-labelled or label-free aptamers. The fluorescence emission changes, producing an enhancement (“signal-on”) or a quenching (“signal-off”) effect, directly reflect the extent of the binding, thereby allowing for quantitative determination of the target in bioanalytical assays. Furthermore, several aptamers conjugated to fluorescent probes proved to be effective for applications in tumour diagnosis and intraoperative surgery, producing tumour-type specific, non-invasive in vivo imaging tools for cancer pre- and post-treatment assessment.
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