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Depauw A, Jonusauskaite L, Ghasemi R, Lefevre JP, Mongin C, Génot V, Delaire J, Leray I. A Highly Sensitive and Selective Optical Sensor for the On-Line Detection of Cesium in Water. SENSORS (BASEL, SWITZERLAND) 2023; 23:7826. [PMID: 37765882 PMCID: PMC10534878 DOI: 10.3390/s23187826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 08/15/2023] [Accepted: 08/26/2023] [Indexed: 09/29/2023]
Abstract
In this study, we have undertaken the development of two fluorescent sensors based on calixarene compounds for the purpose of detecting cesium in water. By introducing the sulfonate functional groups, we have considerably improved the water solubility of sensors, enabling complete dissolution of products in aqueous media and direct analysis of polluted water samples. Through rigorous experiments, we have demonstrated that the complexation of Cs+ ions with sensors 1 and 2 in water leads to a remarkable enhancement of fluorescence. This fluorescence enhancement serves as a reliable indication of cesium presence and allows for sensitive detection. To further advance the practical application of our sensors, we have successfully integrated calixarene sensors 1 and 2 into a microfluidic sensor chip. This integration has enabled real-time, on-line measurements and has resulted in the development of a portable detection device capable of detecting cesium ions in water samples at parts per billion (ppb) levels. This device holds great promise for environmental monitoring and assessment, providing a convenient and efficient solution for cesium detection. Our work represents a significant advancement in the field of cesium detection, displaying the efficacy of calixarene-based fluorescent sensors and their integration into microfluidic systems. The enhanced water solubility, fluorescence response, and portability of our detection device offers tremendous potential for applications in environmental monitoring, water quality assessment, and emergency response scenarios where rapid and accurate cesium detection is crucial.
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Affiliation(s)
- Alexis Depauw
- CNRS, Photophysique et Photochimie Supramoléculaires et Macromoléculaires, ENS Paris-Saclay, Université Paris-Saclay, 4 Avenue des Sciences, 91190 Gif-sur-Yvette, France; (A.D.); (L.J.); (C.M.); (V.G.); (J.D.)
| | - Laura Jonusauskaite
- CNRS, Photophysique et Photochimie Supramoléculaires et Macromoléculaires, ENS Paris-Saclay, Université Paris-Saclay, 4 Avenue des Sciences, 91190 Gif-sur-Yvette, France; (A.D.); (L.J.); (C.M.); (V.G.); (J.D.)
| | - Rasta Ghasemi
- Institut d’Alembert—FR 3242, ENS Paris-Saclay, 4 Avenue des Sciences, 91190 Gif-sur-Yvette, France;
| | - Jean-Pierre Lefevre
- CNRS, Photophysique et Photochimie Supramoléculaires et Macromoléculaires, ENS Paris-Saclay, Université Paris-Saclay, 4 Avenue des Sciences, 91190 Gif-sur-Yvette, France; (A.D.); (L.J.); (C.M.); (V.G.); (J.D.)
| | - C. Mongin
- CNRS, Photophysique et Photochimie Supramoléculaires et Macromoléculaires, ENS Paris-Saclay, Université Paris-Saclay, 4 Avenue des Sciences, 91190 Gif-sur-Yvette, France; (A.D.); (L.J.); (C.M.); (V.G.); (J.D.)
| | - Valérie Génot
- CNRS, Photophysique et Photochimie Supramoléculaires et Macromoléculaires, ENS Paris-Saclay, Université Paris-Saclay, 4 Avenue des Sciences, 91190 Gif-sur-Yvette, France; (A.D.); (L.J.); (C.M.); (V.G.); (J.D.)
| | - Jacques Delaire
- CNRS, Photophysique et Photochimie Supramoléculaires et Macromoléculaires, ENS Paris-Saclay, Université Paris-Saclay, 4 Avenue des Sciences, 91190 Gif-sur-Yvette, France; (A.D.); (L.J.); (C.M.); (V.G.); (J.D.)
| | - Isabelle Leray
- CNRS, Photophysique et Photochimie Supramoléculaires et Macromoléculaires, ENS Paris-Saclay, Université Paris-Saclay, 4 Avenue des Sciences, 91190 Gif-sur-Yvette, France; (A.D.); (L.J.); (C.M.); (V.G.); (J.D.)
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2
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Wang Z, Pan T, Shen M, Liao J, Tian Y. Cross-conjugated polymers as fluorescent probes for intracellular potassium ion detection. SENSORS AND ACTUATORS B: CHEMICAL 2023; 390:134008. [DOI: 10.1016/j.snb.2023.134008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
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3
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Hyun TH, Cho WJ. High-Performance Potassium-Selective Biosensor Platform Based on Resistive Coupling of a-IGZO Coplanar-Gate Thin-Film Transistor. Int J Mol Sci 2023; 24:ijms24076164. [PMID: 37047143 PMCID: PMC10094190 DOI: 10.3390/ijms24076164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/17/2023] [Accepted: 03/23/2023] [Indexed: 04/14/2023] Open
Abstract
The potassium (K+) ion is an essential mineral for balancing body fluids and electrolytes in biological systems and regulating bodily function. It is associated with various disorders. Given that it exists at a low concentration in the human body and should be maintained at a precisely stable level, the development of highly efficient potassium-selective sensors is attracting considerable interest in the healthcare field. Herein, we developed a high-performance, potassium-selective field-effect transistor-type biosensor platform based on an amorphous indium gallium zinc oxide coplanar-gate thin-film transistor using a resistive coupling effect with an extended gate containing a potassium-selective membrane. The proposed sensor can detect potassium in KCl solutions with a high sensitivity of 51.9 mV/dec while showing a low sensitivity of <6.6 mV/dec for NaCl, CaCl2, and pH buffer solutions, indicating its high selectivity to potassium. Self-amplification through the resistive-coupling effect enabled an even greater potassium sensitivity of 597.1 mV/dec. Additionally, we ensured the stability and reliability of short- and long-term detection through the assessment of non-ideal behaviors, including hysteresis and drift effects. Therefore, the proposed potassium-sensitive biosensor platform is applicable to high-performance detection in a living body, with high sensitivity and selectivity for potassium.
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Affiliation(s)
- Tae-Hwan Hyun
- Department of Electronic Materials Engineering, Kwangwoon University, 20, Gwangun-ro, Nowon-gu, Seoul 01897, Republic of Korea
| | - Won-Ju Cho
- Department of Electronic Materials Engineering, Kwangwoon University, 20, Gwangun-ro, Nowon-gu, Seoul 01897, Republic of Korea
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4
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6-(2′-(4″-Oxabutyloxy)phenyl)-1,6,11-triaza-3,9,14,17,22,25-hexaoxa-2(1,2)(4-methylbenzena)-10(1,2)(5-methylbenzena)bicyclo(9.8.8)heptacosaphane Sodium Bromide Dichloromethane. MOLBANK 2022. [DOI: 10.3390/m1348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Potassium ion sensors are important for the study of concentration profiles in tissues. The synthesis of a cryptand suited for potassium ions and the crystal structure of it with a chelated sodium ion are presented.
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5
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Pan Y, Hu X, Guo D. Biomedizinische Anwendungen von Calixarenen: Stand der Wissenschaft und Perspektiven. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916380] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yu‐Chen Pan
- College of Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education) State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China
| | - Xin‐Yue Hu
- College of Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education) State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China
| | - Dong‐Sheng Guo
- College of Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education) State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China
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6
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Pan Y, Hu X, Guo D. Biomedical Applications of Calixarenes: State of the Art and Perspectives. Angew Chem Int Ed Engl 2020; 60:2768-2794. [DOI: 10.1002/anie.201916380] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Yu‐Chen Pan
- College of Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education) State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China
| | - Xin‐Yue Hu
- College of Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education) State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China
| | - Dong‐Sheng Guo
- College of Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education) State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China
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7
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Close Temporal Relationship between Oscillating Cytosolic K + and Growth in Root Hairs of Arabidopsis. Int J Mol Sci 2020; 21:ijms21176184. [PMID: 32867067 PMCID: PMC7504304 DOI: 10.3390/ijms21176184] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 08/17/2020] [Accepted: 08/21/2020] [Indexed: 02/06/2023] Open
Abstract
Root hair elongation relies on polarized cell expansion at the growing tip. As a major osmotically active ion, potassium is expected to be continuously assimilated to maintain cell turgor during hair tip growth. However, due to the lack of practicable detection methods, the dynamics and physiological role of K+ in hair growth are still unclear. In this report, we apply the small-molecule fluorescent K+ sensor NK3 in Arabidopsis root hairs for the first time. By employing NK3, oscillating cytoplasmic K+ dynamics can be resolved at the tip of growing root hairs, similar to the growth oscillation pattern. Cross-correlation analysis indicates that K+ oscillation leads the growth oscillations by approximately 1.5 s. Artificially increasing cytoplasmic K+ level showed no significant influence on hair growth rate, but led to the formation of swelling structures at the tip, an increase of cytosolic Ca2+ level and microfilament depolymerization, implying the involvement of antagonistic regulatory factors (e.g., Ca2+ signaling) in the causality between cytoplasmic K+ and hair growth. These results suggest that, in each round of oscillating root hair elongation, the oscillatory cell expansion accelerates on the heels of cytosolic K+ increment, and decelerates with the activation of antagonistic regulators, thus forming a negative feedback loop which ensures the normal growth of root hairs.
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8
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Wu X, Jia M, Huang M, Kim JK, Zhao Z, Liu J, Xi J, Li Y, Wu Y. A visible-light-induced “on–off” one-pot synthesis of 3-arylacetylene coumarins with AIE properties. Org Biomol Chem 2020; 18:3346-3353. [DOI: 10.1039/d0ob00479k] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A mild one-pot approach to 3-arylacetylene coumarins with potential AIE activities was developed via photosensitizer-free photocatalysis and thermocatalysis.
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Affiliation(s)
- Xinjie Wu
- College of Chemistry
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Key Laboratory of Applied Chemistry of Henan Universities
- Zhengzhou University
- Zhengzhou
| | - Ming Jia
- School of Materials Science and Engineering
- Zhengzhou University
- Zhengzhou 450052
- P.R. China
| | - Mengmeng Huang
- College of Chemistry
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Key Laboratory of Applied Chemistry of Henan Universities
- Zhengzhou University
- Zhengzhou
| | - Jung Keun Kim
- College of Chemistry
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Key Laboratory of Applied Chemistry of Henan Universities
- Zhengzhou University
- Zhengzhou
| | - Zheng Zhao
- Department of Chemistry
- The Hong Kong University of Science and Technology
- P.R. China
| | - Junkai Liu
- Department of Chemistry
- The Hong Kong University of Science and Technology
- P.R. China
| | - Jinhu Xi
- College of Chemistry
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Key Laboratory of Applied Chemistry of Henan Universities
- Zhengzhou University
- Zhengzhou
| | - Yabo Li
- College of Chemistry
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Key Laboratory of Applied Chemistry of Henan Universities
- Zhengzhou University
- Zhengzhou
| | - Yangjie Wu
- College of Chemistry
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Key Laboratory of Applied Chemistry of Henan Universities
- Zhengzhou University
- Zhengzhou
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9
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Live cell imaging of signaling and metabolic activities. Pharmacol Ther 2019; 202:98-119. [DOI: 10.1016/j.pharmthera.2019.06.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 05/31/2019] [Indexed: 12/15/2022]
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10
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Cao D, Liu Z, Verwilst P, Koo S, Jangjili P, Kim JS, Lin W. Coumarin-Based Small-Molecule Fluorescent Chemosensors. Chem Rev 2019; 119:10403-10519. [PMID: 31314507 DOI: 10.1021/acs.chemrev.9b00145] [Citation(s) in RCA: 591] [Impact Index Per Article: 118.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Coumarins are a very large family of compounds containing the unique 2H-chromen-2-one motif, as it is known according to IUPAC nomenclature. Coumarin derivatives are widely found in nature, especially in plants and are constituents of several essential oils. Up to now, thousands of coumarin derivatives have been isolated from nature or produced by chemists. More recently, the coumarin platform has been widely adopted in the design of small-molecule fluorescent chemosensors because of its excellent biocompatibility, strong and stable fluorescence emission, and good structural flexibility. This scaffold has found wide applications in the development of fluorescent chemosensors in the fields of molecular recognition, molecular imaging, bioorganic chemistry, analytical chemistry, materials chemistry, as well as in the biology and medical science communities. This review focuses on the important progress of coumarin-based small-molecule fluorescent chemosensors during the period of 2012-2018. This comprehensive and critical review may facilitate the development of more powerful fluorescent chemosensors for broad and exciting applications in the future.
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Affiliation(s)
- Duxia Cao
- Institute of Fluorescent Probes for Biological Imaging, School of Materials Science and Engineering, School of Chemistry and Chemical Engineering , University of Jinan , Jinan 250022 , China
| | - Zhiqiang Liu
- State Key Laboratory of Crystal Materials , Shandong University , Jinan 250100 , China
| | - Peter Verwilst
- Department of Chemistry , Korea University , Seoul 02841 , Korea
| | - Seyoung Koo
- Department of Chemistry , Korea University , Seoul 02841 , Korea
| | | | - Jong Seung Kim
- Department of Chemistry , Korea University , Seoul 02841 , Korea
| | - Weiying Lin
- Institute of Fluorescent Probes for Biological Imaging, School of Materials Science and Engineering, School of Chemistry and Chemical Engineering , University of Jinan , Jinan 250022 , China.,School of Chemistry and Chemical Engineering , Guangxi University , Nanning , Guangxi 530004 , P. R. China
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11
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Wang R, Du X, Wu Y, Zhai J, Xie X. Graphene Quantum Dots Integrated in Ionophore-Based Fluorescent Nanosensors for Na + and K .. ACS Sens 2018; 3:2408-2414. [PMID: 30387340 DOI: 10.1021/acssensors.8b00918] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
To enrich the recipes of ion-selective nanosensors, graphene quantum dots (GQDs) were integrated into ionophore-based fluorescent nanosensors with exquisite selectivity and high sensitivity for Na+ and K+. The unique property of GQDs gave the nanosensors ultrasmall size (ca. 10 nm), high brightness, good biocompatibility, and potential pH sensing possibility. At pH 7.4, the sensors exhibited a detection range from 0.1 mM to 1 M for Na+ and from 3 μM to 1 mM for K+. The nanosensors were successfully applied to blood serum and urine samples. Chemically induced intracellular sodium concentration change in HeLa cells was also qualitatively monitored.
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Affiliation(s)
- Renjie Wang
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
| | - Xinfeng Du
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
| | - Yaotian Wu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
| | - Jingying Zhai
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
| | - Xiaojiang Xie
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
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12
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Improvement of the extraction ability of bis(2-propyloxy)calix[4]arene-crown-6 toward cesium cation by introducing an intramolecular triple cooperative effect. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2018.01.051] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Octeau JC, Faas G, Mody I, Khakh BS. Making, Testing, and Using Potassium Ion Selective Microelectrodes in Tissue Slices of Adult Brain. J Vis Exp 2018. [PMID: 29781998 DOI: 10.3791/57511] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Potassium ions significantly contribute to the resting membrane potential of cells and, therefore, extracellular K+ concentration is a crucial regulator of cell excitability. Altered concentrations of extracellular K+ affect the resting membrane potential and cellular excitability by shifting the equilibria between closed, open and inactivated states for voltage-dependent ion channels that underlie action potential initiation and conduction. Hence, it is valuable to directly measure extracellular K+ dynamics in health and diseased states. Here, we describe how to make, calibrate and use monopolar K+-selective microelectrodes. We deployed them in adult hippocampal brain slices to measure electrically evoked K+ concentration dynamics. The judicious use of such electrodes is an important part of the tool-kit needed to evaluate cellular and biophysical mechanisms that control extracellular K+ concentrations in the nervous system.
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Affiliation(s)
- J Christopher Octeau
- Department of Physiology, David Geffen School of Medicine, University of California Los Angeles;
| | - Guido Faas
- Department of Neurology, David Geffen School of Medicine, University of California Los Angeles
| | - Istvan Mody
- Department of Physiology, David Geffen School of Medicine, University of California Los Angeles; Department of Neurology, David Geffen School of Medicine, University of California Los Angeles
| | - Baljit S Khakh
- Department of Physiology, David Geffen School of Medicine, University of California Los Angeles; Department of Neurobiology, David Geffen School of Medicine, University of California Los Angeles;
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14
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Mueller BJ, Zhdanov AV, Borisov SM, Foley T, Okkelman IA, Tsytsarev V, Tang Q, Erzurumlu RS, Chen Y, Zhang H, Toncelli C, Klimant I, Papkovsky DB, Dmitriev RI. Nanoparticle-based fluoroionophore for analysis of potassium ion dynamics in 3D tissue models and in vivo. ADVANCED FUNCTIONAL MATERIALS 2018; 28:1704598. [PMID: 30271316 PMCID: PMC6157274 DOI: 10.1002/adfm.201704598] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The imaging of real-time fluxes of K+ ions in live cell with high dynamic range (5-150 mM) is of paramount importance for neuroscience and physiology of the gastrointestinal tract, kidney and other tissues. In particular, the research on high-performance deep-red fluorescent nanoparticle-based biosensors is highly anticipated. We found that BODIPY-based FI3 K+-sensitive fluoroionophore encapsulated in cationic polymer RL100 nanoparticles displays unusually strong efficiency in staining of broad spectrum of cell models, such as primary neurons and intestinal organoids. Using comparison of brightness, photostability and fluorescence lifetime imaging microscopy (FLIM) we confirmed that FI3 nanoparticles display distinctively superior intracellular staining compared to the free dye. We evaluated FI3 nanoparticles in real-time live cell imaging and found that it is highly useful for monitoring intra- and extracellular K+ dynamics in cultured neurons. Proof-of-concept in vivo brain imaging confirmed applicability of the biosensor for visualization of epileptic seizures. Collectively, this data makes fluoroionophore FI3 a versatile cross-platform fluorescent biosensor, broadly compatible with diverse experimental models and that crown ether-based polymer nanoparticles can provide a new venue for design of efficient fluorescent probes.
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Affiliation(s)
- Bernhard J. Mueller
- Institute of Analytical Chemistry and Food Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Alexander V. Zhdanov
- ABCRF, School of Biochemistry and Cell biology, University College Cork, Cork, Ireland
| | - Sergey M. Borisov
- Institute of Analytical Chemistry and Food Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Tara Foley
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
| | - Irina A. Okkelman
- ABCRF, School of Biochemistry and Cell biology, University College Cork, Cork, Ireland
| | - Vassiliy Tsytsarev
- Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Qinggong Tang
- Fischell Department of Bioengineering, University of Maryland, College Park, 20740 MD, USA
| | - Reha S. Erzurumlu
- Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Yu Chen
- Fischell Department of Bioengineering, University of Maryland, College Park, 20740 MD, USA
| | - Haijiang Zhang
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biomimetic Membranes and Textiles, Lerchenfeldstrasse 5, CH-9014 St. Gallen, Switzerland
| | - Claudio Toncelli
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biomimetic Membranes and Textiles, Lerchenfeldstrasse 5, CH-9014 St. Gallen, Switzerland
| | - Ingo Klimant
- Institute of Analytical Chemistry and Food Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Dmitri B. Papkovsky
- ABCRF, School of Biochemistry and Cell biology, University College Cork, Cork, Ireland
| | - Ruslan I. Dmitriev
- ABCRF, School of Biochemistry and Cell biology, University College Cork, Cork, Ireland
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15
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Gao Y, Zeng F, Sun X, Zeng M, Yang Z, Huang X, Shen G, Tan Y, Feng R, Qi C. One-pot Synthesis of Alkynylated Coumarins via
Rhodium-Catalyzed Annulation of Aryl Thiocarbamates with 1,3-Diynes or Terminal Alkynes. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701388] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yuan Gao
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Department of Chemistry; Shaoxing University; Shaoxing 312000 People's Republic of China
| | - Fenfen Zeng
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Department of Chemistry; Shaoxing University; Shaoxing 312000 People's Republic of China
| | - Xudong Sun
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Department of Chemistry; Shaoxing University; Shaoxing 312000 People's Republic of China
| | - Minfeng Zeng
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Department of Chemistry; Shaoxing University; Shaoxing 312000 People's Republic of China
| | - Zhen Yang
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Department of Chemistry; Shaoxing University; Shaoxing 312000 People's Republic of China
| | - Xianqiang Huang
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry & Chemical Engineering; Liaocheng University; Liaocheng 252059 People's Republic of China
| | - Guodong Shen
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry & Chemical Engineering; Liaocheng University; Liaocheng 252059 People's Republic of China
| | - Yongsheng Tan
- Department of Physics; Shaoxing University; Shaoxing 312000 People's Republic of China
| | - Ruokun Feng
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Department of Chemistry; Shaoxing University; Shaoxing 312000 People's Republic of China
| | - Chenze Qi
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Department of Chemistry; Shaoxing University; Shaoxing 312000 People's Republic of China
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16
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Schwarze T, Mertens M, Müller P, Riemer J, Wessig P, Holdt HJ. Highly K + -Selective Fluorescent Probes for Lifetime Sensing of K + in Living Cells. Chemistry 2017; 23:17186-17190. [PMID: 28895214 DOI: 10.1002/chem.201703799] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Indexed: 12/16/2022]
Abstract
The new K+ -selective fluorescent probes 1 and 2 were obtained by CuI -catalyzed 1,3-dipolar azide alkyne cycloaddition (CuAAC) reactions of an alkyne-substituted [1,3]dioxolo[4,5-f][1,3]benzodioxole (DBD) ester fluorophore with azido-functionalized N-phenylaza-18-crown-6 ether and N-(o-isopropoxy) phenylaza-18-crown-6 ether, respectively. Probes 1 and 2 allow the detection of K+ in the presence of Na+ in water by fluorescence enhancement (2.2 for 1 at 2000 mm K+ and 2.5 for 2 at 160 mm K+ ). Fluorescence lifetime measurements in the absence and presence of K+ revealed bi-exponential decay kinetics with similar lifetimes, however with different proportions changing the averaged fluorescence decay times (τf(av) ). For 1 a decrease of τf(av) from 12.4 to 9.3 ns and for 2 an increase from 17.8 to 21.8 ns was observed. Variation of the substituent in ortho position of the aniline unit of the N-phenylaza-18-crown-6 host permits the modulation of the Kd value for a certain K+ concentration. For example, substitution of H in 1 by the isopropoxy group (2) decreased the Kd value from >300 mm to 10 mm. 2 was chosen for studying the efflux of K+ from human red blood cells (RBC). Upon addition of the Ca2+ ionophor ionomycin to a RBC suspension in a buffer containing Ca2+ , the fluorescence of 2 slightly rose within 10 min, however, after 120 min a significant increase was observed.
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Affiliation(s)
- Thomas Schwarze
- Institut für Chemie, Anorganische Chemie, Universität Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Golm, Germany
| | - Monique Mertens
- Institut für Chemie, Bioorganische Chemie, Universität Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Golm, Germany
| | - Peter Müller
- Institut für Biologie/Molekulare Biophysik, Humboldt Universität zu Berlin, Invalidenstr. 42, 10115, Berlin, Germany
| | - Janine Riemer
- Institut für Chemie, Anorganische Chemie, Universität Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Golm, Germany
| | - Pablo Wessig
- Institut für Chemie, Bioorganische Chemie, Universität Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Golm, Germany
| | - Hans-Jürgen Holdt
- Institut für Chemie, Anorganische Chemie, Universität Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Golm, Germany
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Astrocytic modulation of neuronal excitability through K + spatial buffering. Neurosci Biobehav Rev 2017; 77:87-97. [PMID: 28279812 DOI: 10.1016/j.neubiorev.2017.03.002] [Citation(s) in RCA: 133] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 03/05/2017] [Accepted: 03/05/2017] [Indexed: 11/22/2022]
Abstract
The human brain contains two major cell populations, neurons and glia. While neurons are electrically excitable and capable of discharging short voltage pulses known as action potentials, glial cells are not. However, astrocytes, the prevailing subtype of glia in the cortex, are highly connected and can modulate the excitability of neurons by changing the concentration of potassium ions in the extracellular environment, a process called K+ clearance. During the past decade, astrocytes have been the focus of much research, mainly due to their close association with synapses and their modulatory impact on neuronal activity. It has been shown that astrocytes play an essential role in normal brain function including: nitrosative regulation of synaptic release in the neocortex, synaptogenesis, synaptic transmission and plasticity. Here, we discuss the role of astrocytes in network modulation through their K+ clearance capabilities, a theory that was first raised 50 years ago by Orkand and Kuffler. We will discuss the functional alterations in astrocytic activity that leads to aberrant modulation of network oscillations and synchronous activity.
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