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Dosedělová V, Kubáň P. Investigation of interactions between biological thiols and gold nanoparticles by capillary electrophoresis with laser-induced fluorescence. Electrophoresis 2024; 45:1418-1427. [PMID: 38191956 DOI: 10.1002/elps.202300248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 12/19/2023] [Accepted: 01/01/2024] [Indexed: 01/10/2024]
Abstract
Biological thiols spontaneously form a stable Au-S dative bond with gold nanoparticles (AuNP) that might be used for their selective extraction and enrichment in biological samples. In this work, interactions of selected biological thiols (glutathione, cysteine, homocysteine [Hcys], cysteamine [CA], and N-acetylcysteine) with AuNP stabilized by different capping agents (citrate, Tween 20, Brij 35, CTAB, SDS) were investigated by UV-Vis spectroscopy and capillary electrophoresis with laser-induced fluorescence. Spectrophotometric measurements showed aggregation of Hcys and CA with AuNP. In contrast, it was confirmed by CE-LIF that biological thiols were adsorbed to all types of AuNP. Citrate-capped AuNP were selected for AuNP-based extraction of biological thiols from exhaled breath condensate (EBC). Dithiothreitol was utilized for desorption of biological thiols from the AuNP surface, which was followed by derivatization with eosin-5-maleimide and CE-LIF analysis. AuNP-based extraction increased the sensitivity of CE-LIF analysis; however, further optimization of methodology is necessary for accurate quantification of biological thiols in EBC.
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Affiliation(s)
- Věra Dosedělová
- Department of Bioanalytical Instrumentation, Institute of Analytical Chemistry of the Czech Academy of Sciences, Brno, Czech Republic
| | - Petr Kubáň
- Department of Bioanalytical Instrumentation, Institute of Analytical Chemistry of the Czech Academy of Sciences, Brno, Czech Republic
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2
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Fu GQ, Song Q, Wang ZQ, Chao JJ, Zhang H, Mao GJ, Chen DH, Li CY. Long-Term Imaging of Cys in Cells and Tumor Mice by a Solid-State Fluorescence Probe. Anal Chem 2023; 95:17559-17567. [PMID: 37994418 DOI: 10.1021/acs.analchem.3c02872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2023]
Abstract
Cysteine is an important biological thiol and is closely related to cancer. It remains a challenge to develop a probe that can provide long-term fluorescence detection and imaging of Cys in cells as well as in living organisms. Here, a solid-state fluorophore HTPQ is combined with an acrylate group to construct a solid-state fluorescent probe HTPQC for Cys recognition. The fluorescence of the probe is quenched when the photoinduced electron transfer (PET) process is turned on and the excited-state intramolecular proton transfer (ESIPT) process is turned off. In the presence of Cys, an obvious solid-state fluorescence signal can be observed. The double quenching mechanism makes the probe HTPQC have the advantages of high sensitivity, good selectivity, and high contrast of biological imaging. Due to low cytotoxicity, the probe HTPQC can be used to detect exogenous and endogenous Cys in living cells and is capable of imaging over long periods of time. By making full use of long wavelengths, the probe can be applied for the detection of Cys levels in tumor mice and equipped with the ability to conduct long-term imaging in vivo.
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Affiliation(s)
- Gui-Qin Fu
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, P. R. China
| | - Qian Song
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, P. R. China
| | - Zhi-Qing Wang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, P. R. China
| | - Jing-Jing Chao
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, P. R. China
| | - Hui Zhang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, P. R. China
| | - Guo-Jiang Mao
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, P. R. China
| | - Dong-Hua Chen
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, P. R. China
| | - Chun-Yan Li
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, P. R. China
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3
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Zaeifi F, Sedaghati F, Samari F. A new electrochemical sensor based on green synthesized CuO nanostructures modified carbon ionic liquid electrode for electrocatalytic oxidation and monitoring of l-cysteine. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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4
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Mei H, Gu X, Wang M, Cai Y, Xu K. A novel cysteine fluorescent probe based on benzothiazole and quinoline with a large stokes shift and application in living cell and mice. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113335] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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5
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Lin J, Wang Q, Wang X, Zhu Y, Zhou X, Wei H. Gold alloy-based nanozyme sensor arrays for biothiol detection. Analyst 2020; 145:3916-3921. [PMID: 32301943 DOI: 10.1039/d0an00451k] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Biothiols play an important role in living cells and are associated with many diseases. Thus, it is necessary to develop a facile, cost-effective, and convenient analytical method for the detection of biothiols. Nanozymes are functional nanomaterials with enzymatic activities. Due to their unique advantages (e.g., low cost, high stability, and multifunctionality), nanozymes have been extensively used to construct sensing systems. Previous studies demonstrated colorimetric assays for biothiol detection because they could competitively inhibit the peroxidase-like activities of nanozymes. However, few studies were able to differentiate biothiols from each other. To address these challenges, herein, we first synthesized Au alloy nanozymes with better peroxidase-like activities than gold nanoparticles (AuNPs). Then, cross-reactive sensor arrays were constructed with three alloy nanozymes. Six typical biothiols (i.e., glutathione, cysteine, dithiothreitol, mercaptoacetic acid, mercaptoethanol, and mercaptosuccinic acid) were successfully detected and discriminated by the as-prepared nanozyme sensor arrays. Moreover, the practical application of the nanozyme sensor arrays was demonstrated by discriminating biothiols in serum successfully.
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Affiliation(s)
- Junshu Lin
- Department of Biomaterials, College of Materials, Xiamen University, Xiamen, Fujian 361005, China.
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6
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7
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Kim T, Hong JI. Photoluminescence and Electrochemiluminescence Dual-Signaling Sensors for Selective Detection of Cysteine Based on Iridium(III) Complexes. ACS OMEGA 2019; 4:12616-12625. [PMID: 31460382 PMCID: PMC6682121 DOI: 10.1021/acsomega.9b01501] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 07/12/2019] [Indexed: 05/11/2023]
Abstract
Cysteine (Cys) is important in biosynthesis, detoxification, and metabolism. The selective detection of Cys over structurally similar homocysteine (Hcy) or glutathione (GSH) remains an immense challenge. Although there are many methods for detecting Cys, photoluminescence (PL) and electrochemiluminescence (ECL) techniques are well-suited for clinical diagnostics and analytical technology because of their high sensitivities. Herein, we report PL and ECL dual-channel sensors using cyclometalated iridium(III) complexes for the discrimination of Cys from Hcy and GSH. The sensors react with cysteine preferentially because of kinetic differences in intramolecular conjugate addition/cyclization, enabling phosphorescence enhancement and ECL decrease in the blue-shifted region. Sensor 1 shows ratiometric PL turn-on and ECL turn-off for Cys. In addition, unique ECL-enhancing behavior of sensor 1 toward GSH enables discrimination between Cys and GSH. Sensor 1 was successfully applied to the detection of Cys in human serum by the ECL method. We demonstrate the first case of a Cys-selective PL and ECL dual-channel chemodosimetric sensor based on cyclometalated iridium(III) complexes and expect that the rational design of efficient PL and ECL dual-channel sensors will be useful in diagnostic technology.
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8
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Zhou L, Gan N, Wu Y, Hu F, Lin J, Cao Y, Wu D. Multiplex detection of quality indicator molecule targets in urine using programmable hairpin probes based on a simple double-T type microchip electrophoresis platform and isothermal polymerase-catalyzed target recycling. Analyst 2019; 143:2696-2704. [PMID: 29774900 DOI: 10.1039/c8an00141c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Recently, it has been crucial to be able to detect and quantify small molecular targets simultaneously in biological samples. Herein, a simple and conventional double-T type microchip electrophoresis (MCE) based platform for the multiplex detection of quality indicator molecule targets in urine, using ampicillin (AMPI), adenosine triphosphate (ATP) and estradiol (E2) as models, was developed. Several programmable hairpin probes (PHPs) were designed for detecting different targets and triggering isothermal polymerase-catalyzed target recycling (IPCTR) for signal amplification. Based on the target-responsive aptamer structure of PHP (Domain I), target recognition can induce PHP conformational transition and produce extension duplex DNA (dsDNA), assisted by primers & Bst polymerase. Afterwards, the target can be displaced to react with another PHP and initiate the next cycle. After several rounds of reaction, the dsDNA can be produced in large amounts by IPCTR. Three targets can be simultaneously converted to dsDNA fragments with different lengths, which can be separated and detected using MCE. Thus, a simple double-T type MCE based platform was successfully built for the homogeneous detection of multiplex targets in one channel. Under optimal conditions, the assay exhibited high throughput (48 samples per hour at most, not including reaction time) and sensitivity to three targets in urine with a detection limit of 1 nM (ATP), 0.05 nM (AMPI) and 0.1 nM (E2) respectively. The multiplex assay was successfully employed for the above three targets in several urine samples and combined the advantages of the high specificity of programmable hairpin probes, the excellent signal amplification of IPCTR, and the high through-put of MCE which can be employed for screening in biochemical analysis.
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Affiliation(s)
- Lingying Zhou
- Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China.
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9
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Zhao XH, Zhang LZ, Zhao SY, Cui XH, Gong L, Zhao R, Yu BF, Xie J. Silver-ion-mediated Mg2+-dependent DNAzyme activity for amplified fluorescence detection of cysteine. Analyst 2019; 144:1982-1987. [DOI: 10.1039/c8an02308e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Schematic illustration of a DNAzyme-based fluorescent biosensor for amplified Cys detection.
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Affiliation(s)
- Xu-Hua Zhao
- Department of Biochemistry and Molecular Biology
- Shanxi Medical University
- Taiyuan 030001
- P. R. China
| | - Li-Zhuan Zhang
- Department of Biochemistry and Molecular Biology
- Shanxi Medical University
- Taiyuan 030001
- P. R. China
| | - Su-Ya Zhao
- Department of Biochemistry and Molecular Biology
- Shanxi Medical University
- Taiyuan 030001
- P. R. China
| | - Xiao-Hua Cui
- Department of Biochemistry and Molecular Biology
- Shanxi Medical University
- Taiyuan 030001
- P. R. China
| | - Liang Gong
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices
- College of Life Sciences and Chemistry
- Hunan University of Technology
- Zhuzhou 412007
- China
| | - Rong Zhao
- Department of Biochemistry and Molecular Biology
- Shanxi Medical University
- Taiyuan 030001
- P. R. China
| | - Bao-Feng Yu
- Department of Biochemistry and Molecular Biology
- Shanxi Medical University
- Taiyuan 030001
- P. R. China
| | - Jun Xie
- Department of Biochemistry and Molecular Biology
- Shanxi Medical University
- Taiyuan 030001
- P. R. China
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10
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Disposable electrochemical sensor based on copper-electrodeposited screen-printed gold electrode and its application in sensing l-Cysteine. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2018.08.140] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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11
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Yeasmin Khusbu F, Zhou X, Chen H, Ma C, Wang K. Thioflavin T as a fluorescence probe for biosensing applications. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2018.09.013] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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12
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Sheng H, Hu Y, Zhou Y, Fan S, Cao Y, Zhao X, Yang W. A hydroxyphenylquinazolinone-based fluorescent probe for turn-on detection of cysteine with a large Stokes shift and its application in living cells. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.07.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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13
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Chai G, Liu Q, Fei Q, Zhang J, Sun X, Shan H, Feng G, Huan Y. A selective and sensitive fluorescent sensor for cysteine detection based on bi-8-carboxamidoquinoline derivative and Cu2+
complex. LUMINESCENCE 2017; 33:153-160. [DOI: 10.1002/bio.3385] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 07/02/2017] [Accepted: 07/18/2017] [Indexed: 01/02/2023]
Affiliation(s)
- Guoping Chai
- College of Chemistry; Jilin University; Changchun People's Republic of China
| | - Qingwen Liu
- College of Chemistry; Jilin University; Changchun People's Republic of China
| | - Qiang Fei
- College of Chemistry; Jilin University; Changchun People's Republic of China
| | - Jinling Zhang
- College of Chemistry; Jilin University; Changchun People's Republic of China
| | - Xiaoxiao Sun
- College of Chemistry; Jilin University; Changchun People's Republic of China
| | - Hongyan Shan
- College of Chemistry; Jilin University; Changchun People's Republic of China
| | - Guodong Feng
- College of Chemistry; Jilin University; Changchun People's Republic of China
| | - Yanfu Huan
- College of Chemistry; Jilin University; Changchun People's Republic of China
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14
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Lačná J, Foret F, Kubáň P. Capillary electrophoresis in the analysis of biologically important thiols. Electrophoresis 2016; 38:203-222. [DOI: 10.1002/elps.201600354] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 08/30/2016] [Accepted: 08/31/2016] [Indexed: 12/21/2022]
Affiliation(s)
- Júlia Lačná
- Bioanalytical Instrumentation; CEITEC Masaryk University; Brno Czech Republic
- Department of Chemistry; Masaryk University; Brno Czech Republic
| | - František Foret
- Bioanalytical Instrumentation; CEITEC Masaryk University; Brno Czech Republic
- Department of Bioanalytical Instrumentation, Institute of Analytical Chemistry; Academy of Sciences of the Czech Republic; Brno Czech Republic
| | - Petr Kubáň
- Bioanalytical Instrumentation; CEITEC Masaryk University; Brno Czech Republic
- Department of Bioanalytical Instrumentation, Institute of Analytical Chemistry; Academy of Sciences of the Czech Republic; Brno Czech Republic
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15
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WITHDRAWN: Selective electrochemical detection of cysteine using silver - polydopamine composite. SENSING AND BIO-SENSING RESEARCH 2016. [DOI: 10.1016/j.sbsr.2016.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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16
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Thota R, Ganesh V. Simple and facile preparation of silver–polydopamine (Ag–PDA) core–shell nanoparticles for selective electrochemical detection of cysteine. RSC Adv 2016. [DOI: 10.1039/c6ra06994k] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple one-step method for the preparation of silver–polydopamine (Ag–PDA) core–shell nanoparticles is proposed and its application for non-enzymatic electrochemical detection of cysteine is demonstrated.
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Affiliation(s)
- Raju Thota
- Electrodics and Electrocatalysis (EEC) Division
- CSIR – Central Electrochemical Research Institute (CSIR – CECRI)
- Karaikudi – 630003
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - V. Ganesh
- Electrodics and Electrocatalysis (EEC) Division
- CSIR – Central Electrochemical Research Institute (CSIR – CECRI)
- Karaikudi – 630003
- India
- Academy of Scientific and Innovative Research (AcSIR)
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17
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Recent applications of microchip electrophoresis to biomedical analysis. J Pharm Biomed Anal 2015; 113:72-96. [DOI: 10.1016/j.jpba.2015.03.002] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 02/28/2015] [Accepted: 03/03/2015] [Indexed: 11/22/2022]
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18
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Present state of microchip electrophoresis: state of the art and routine applications. J Chromatogr A 2014; 1382:66-85. [PMID: 25529267 DOI: 10.1016/j.chroma.2014.11.034] [Citation(s) in RCA: 130] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 11/07/2014] [Accepted: 11/12/2014] [Indexed: 12/20/2022]
Abstract
Microchip electrophoresis (MCE) was one of the earliest applications of the micro-total analysis system (μ-TAS) concept, whose aim is to reduce analysis time and reagent and sample consumption while increasing throughput and portability by miniaturizing analytical laboratory procedures onto a microfluidic chip. More than two decades on, electrophoresis remains the most common separation technique used in microfluidic applications. MCE-based instruments have had some commercial success and have found application in many disciplines. This review will consider the present state of MCE including recent advances in technology and both novel and routine applications in the laboratory. We will also attempt to assess the impact of MCE in the scientific community and its prospects for the future.
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Abdelhamid HN, Wu HF. Facile synthesis of nano silver ferrite (AgFeO2) modified with chitosan applied for biothiol separation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 45:438-45. [DOI: 10.1016/j.msec.2014.08.071] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Revised: 07/29/2014] [Accepted: 08/31/2014] [Indexed: 10/24/2022]
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20
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Dai X, Wu QH, Wang PC, Tian J, Xu Y, Wang SQ, Miao JY, Zhao BX. A simple and effective coumarin-based fluorescent probe for cysteine. Biosens Bioelectron 2014; 59:35-9. [PMID: 24690559 DOI: 10.1016/j.bios.2014.03.018] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 03/05/2014] [Accepted: 03/06/2014] [Indexed: 01/01/2023]
Abstract
Acrylic acid 3-acetyl-2-oxo-2 H-chromen-7-yl ester (ACA) was rationally designed and synthesized as a simple and effective fluorescent probe for sensing cysteine with high selectivity and naked-eye detection. The probe can detect cysteine by fluorescence spectrometry with a detection limit of 0.657 μM and can be used with calf serum and in live cell imaging. The conjugate addition/cyclization sequence mechanism of the reaction between ACA and cysteine was confirmed by ESI-MS and fluorescence spectra.
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Affiliation(s)
- Xi Dai
- Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P.R. China
| | - Qing-Hua Wu
- Institute of Developmental Biology, School of Life Science, Shandong University, Jinan 250100, P.R. China
| | - Peng-Chong Wang
- Institute of Developmental Biology, School of Life Science, Shandong University, Jinan 250100, P.R. China
| | - Jie Tian
- Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P.R. China
| | - Yu Xu
- Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P.R. China
| | - Sheng-Qing Wang
- Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P.R. China
| | - Jun-Ying Miao
- Institute of Developmental Biology, School of Life Science, Shandong University, Jinan 250100, P.R. China.
| | - Bao-Xiang Zhao
- Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P.R. China.
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21
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Tu FQ, Zhang LY, Guo XF, Wang H, Zhang HS. Development of a potential method based on microchip electrophoresis with fluorescence detection for the sensitive determination of intracellular thiols in RAW264.7 cells. Electrophoresis 2014; 35:1188-95. [DOI: 10.1002/elps.201300452] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2013] [Revised: 12/06/2013] [Accepted: 12/19/2013] [Indexed: 12/14/2022]
Affiliation(s)
- Feng-Qin Tu
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education); College of Chemistry and Molecular Sciences; Wuhan University; Wuhan P. R. China
| | - Li-Yun Zhang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education); College of Chemistry and Molecular Sciences; Wuhan University; Wuhan P. R. China
| | - Xiao-Feng Guo
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education); College of Chemistry and Molecular Sciences; Wuhan University; Wuhan P. R. China
| | - Hong Wang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education); College of Chemistry and Molecular Sciences; Wuhan University; Wuhan P. R. China
| | - Hua-Shan Zhang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education); College of Chemistry and Molecular Sciences; Wuhan University; Wuhan P. R. China
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22
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Poinsot V, Ong-Meang V, Gavard P, Couderc F. Recent advances in amino acid analysis by capillary electromigration methods, 2011-2013. Electrophoresis 2013; 35:50-68. [DOI: 10.1002/elps.201300306] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 09/11/2013] [Accepted: 09/11/2013] [Indexed: 12/28/2022]
Affiliation(s)
- Véréna Poinsot
- Laboratoire des IMRCP; Université Paul Sabatier; Toulouse France
| | | | - Pierre Gavard
- Laboratoire des IMRCP; Université Paul Sabatier; Toulouse France
| | - François Couderc
- Laboratoire des IMRCP; Université Paul Sabatier; Toulouse France
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23
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Thiol–chromene click chemistry: A coumarin-based derivative and its use as regenerable thiol probe and in bioimaging applications. Biosens Bioelectron 2013; 47:300-6. [DOI: 10.1016/j.bios.2013.03.007] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 03/07/2013] [Accepted: 03/08/2013] [Indexed: 01/04/2023]
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24
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Tong LL, Li L, Chen Z, Wang Q, Tang B. Stable label-free fluorescent sensing of biothiols based on ThT direct inducing conformation-specific G-quadruplex. Biosens Bioelectron 2013; 49:420-5. [PMID: 23807235 DOI: 10.1016/j.bios.2013.05.051] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 05/29/2013] [Accepted: 05/29/2013] [Indexed: 10/26/2022]
Abstract
In this work, a new, label-free, turn-on fluorescent sensor for biothiols detection based on ThT direct inducing conformation-specific G-quadruplex is developed. The sensing approach is based on a conformational switch of oligonucleotide controlled by Hg(2+) and a commercially available water-soluble fluorescent dye, Thioflavin T (ThT). A noticeable fluorescence light-up in ThT on binding to the G-quadruplex grants the sensor excellent sensitivity. The specific quadruplex conformation induced directly by ThT and pronounced structural selectivity of ThT for G-quadruplexes could generate more stable luminescence and make sure high specificity in complex biological samples. The present assay allows for the selective determination of cysteine and glutathione in the range of 2.0 × 10(-8)-2.5 × 10(-6)M and 3.0 × 10(-8)-2.0 × 10(-6)M with a detection limit of 8.4 nM and 13.9 nM respectively. The diagnostic capability and potential in practical applications of this method have been demonstrated by detecting biothiols in human blood serum.
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Affiliation(s)
- Li-li Tong
- College of Chemistry, Chemical Engineering and Materials Science, Engineering Research Center of Pesticide and Medicine Intermediate Clean Production, , Shandong Normal University, Jinan 250014, PR China
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25
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Chand R, Han D, Kim YS. Voltammetric Analysis on a Disposable Microfluidic Electrochemical Cell. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.4.1175] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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