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Jia YL, Xu CH, Li XQ, Chen HY, Xu JJ. Visual analysis of Alzheimer disease biomarker via low-potential driven bipolar electrode. Anal Chim Acta 2023; 1251:340980. [PMID: 36925305 DOI: 10.1016/j.aca.2023.340980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 02/01/2023] [Accepted: 02/14/2023] [Indexed: 02/19/2023]
Abstract
Developing a simple, economical, and accurate diagnostic method has positive practical significance for the early prevention and intervention of Alzheimer's disease (AD). Herein, combining a closed bipolar electrode (BPE) chip with multicolor electrochemiluminescence (ECL) imaging technology, we constructed a low-voltage driven portable visualized ECL device for the early screening of AD. By introducing parallel resistance, the total resistance of the circuit was greatly reduced. A classical mixture of Ir(ppy)3 and Ru(bpy)32+ was used as multicolor emitters of the anode with TPrA as the co-reactant. Capture of amyloid-β (Aβ) through antigen-antibody recognition, and signal amplification by electroactive covalent organic frameworks (COF) probe at the cathode of BPE caused the significantly increased faradaic current. The electrical balance of the BPE system resulted in the change of the emission color from green to red at the anode. The ECL-BPE sensor shows good reproducibility and high sensitivity with detection limit of 1 pM by naked eye. The driving voltage is 3.0 V, which means the chip could be driven by two fifth batteries. The visualized ECL-BPE sensor provides a promising point-of-care testing (POCT) tool for the screening of Alzheimer's-related diseases in the early stage.
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Affiliation(s)
- Yi-Lei Jia
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Cong-Hui Xu
- Institute of Nanochemistry and Nanobiology, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Xiao-Qiong Li
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Jing-Juan Xu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China.
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2
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He W, Yuan Y, Wu M, Li X, Shen Y, Qu Z, Chen Y. Multicolor Chromism from a Single Chromophore through Synergistic Coupling of Mechanochromic and Photochromic Subunits. Angew Chem Int Ed Engl 2023; 62:e202218785. [PMID: 36642693 DOI: 10.1002/anie.202218785] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/13/2023] [Accepted: 01/13/2023] [Indexed: 01/17/2023]
Abstract
We report a versatile mechanophore exhibiting a vividly detectable, light-regulable multicolor mechanochromism. Such optical features rely on the synergistic coupling of mechanochromic bis-rhodamine (Rh) and photochromic bisthienylethene (BTE). Poly(methyl acrylate)s incorporating this bis-mechanophore can be mechanically activated under sonication. The relative distribution of the two distinctly colored and fluorescent Rh ring-opening products is altered with different magnitudes of applied force. Orthogonal use of the photochromic reaction of the BTE core can strengthen the mechanochromism and gate the mechanofluorescence in polymers. Due to increased conjugation offered by the BTE linker, both force- and light-induced optical signals display high contrast. Combined DFT simulated and experimental results reveal that the three subunits (two Rhs and one BTE) in this chromophore are activated sequentially, thus generating switchable three-colored forms and gradient optical responses.
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Affiliation(s)
- Weiye He
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Science, Tianjin University, Tianjin, 300354, P. R. China
| | - Yuan Yuan
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Science, Tianjin University, Tianjin, 300354, P. R. China
| | - Mengjiao Wu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Xinxin Li
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Science, Tianjin University, Tianjin, 300354, P. R. China
| | - Yanbing Shen
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Science, Tianjin University, Tianjin, 300354, P. R. China
| | - Zhiyu Qu
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Yulan Chen
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Science, Tianjin University, Tianjin, 300354, P. R. China.,State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
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3
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Song J, Ma L, Sun S, Tian H, Ma X. Reversible Multilevel Stimuli-Responsiveness and Multicolor Room-Temperature Phosphorescence Emission Based on a Single-Component System. Angew Chem Int Ed Engl 2022; 61:e202206157. [PMID: 35576103 DOI: 10.1002/anie.202206157] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Indexed: 12/23/2022]
Abstract
There are limited reports about the transformation of pure organic room-temperature phosphorescence (RTP) materials with multilevel stimuli-responsiveness at different RTP emission wavelengths under external stimuli. It is difficult to ensure efficient intersystem crossing (ISC) in different states of a single-component system. This research reports the conversion of the organic single-component small molecule 1,2-bis(4-alkoxyphenyl)ethane-1,2-dione (N-BOX) with multilevel stimuli-responsiveness between high-efficiency blue and yellow RTP by grinding or thermal annealing N-BOX crystals. The RTP emission of N-BOX in the crystalline state was easy to adjust by external stimuli (grinding or thermal annealing) due to its non-compact packing, which led to a phase transition and generated unique multilevel stimuli-responsiveness. In particular, the RTP quantum yield of 7-BOX with multilevel stimuli-responsiveness reached 68.4 %, which provides an opportunity for regulation of smart optical materials based on pure organic RTP.
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Affiliation(s)
- Jinming Song
- Key Laboratory for Advance Materials and Feringa Noble Prize Scientist Joint Research Centre, Frontiers Science for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Meilong Road 130, Shanghai, 200237, China
| | - Liangwei Ma
- Key Laboratory for Advance Materials and Feringa Noble Prize Scientist Joint Research Centre, Frontiers Science for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Meilong Road 130, Shanghai, 200237, China
| | - Siyu Sun
- Key Laboratory for Advance Materials and Feringa Noble Prize Scientist Joint Research Centre, Frontiers Science for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Meilong Road 130, Shanghai, 200237, China
| | - He Tian
- Key Laboratory for Advance Materials and Feringa Noble Prize Scientist Joint Research Centre, Frontiers Science for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Meilong Road 130, Shanghai, 200237, China
| | - Xiang Ma
- Key Laboratory for Advance Materials and Feringa Noble Prize Scientist Joint Research Centre, Frontiers Science for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Meilong Road 130, Shanghai, 200237, China
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4
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Yuan M, Yang Z, Yang X, Wang L, Wang R, Lan S, Han K, Wang H, Xu X. Excitation-Power-Dependent Upconversion Luminescence Competition in Single β-NaYbF 4:Er Microcrystal Pumped at 808 nm. Nanoscale Res Lett 2022; 17:38. [PMID: 35348906 PMCID: PMC8964848 DOI: 10.1186/s11671-021-03649-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 12/30/2021] [Indexed: 06/14/2023]
Abstract
Controlling the upconversion luminescence (UCL) intensity ratio, especially pumped at 808 nm, is of fundamental importance in biological applications due to the water molecules exhibiting low absorption at this excitation wavelength. In this work, a series of β-NaYbF4:Er microrods were synthesized by a simple one-pot hydrothermal method and their intense green (545 nm) and red (650 nm) UCL were experimentally investigated based on the single-particle level under the excitation of 808 nm continuous-wave (CW) laser. Interestingly, the competition between the green and red UCL can be observed in highly Yb3+-doped microcrystals as the excitation intensity gradually increases, which leads to the UCL color changing from green to orange. However, the microcrystals doped with low Yb3+ concentration keep green color which is independent of the excitation power. Further investigations demonstrate that the cross-relaxation (CR) processes between Yb3+ and Er3+ ions result in the UCL competition.
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Affiliation(s)
- Maohui Yuan
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, 410073, China
- Department of Physics and Chemistry, PLA Army Academy of Special Operations, Guangzhou, 510507, China
| | - Zining Yang
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, 410073, China
- State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Changsha, 410073, China
- Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha, 410073, China
| | - Xu Yang
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, 410073, China
- State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Changsha, 410073, China
- Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha, 410073, China
| | - Linxuan Wang
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, 410073, China
- State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Changsha, 410073, China
- Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha, 410073, China
| | - Rui Wang
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, 410073, China
- State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Changsha, 410073, China
- Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha, 410073, China
| | - Sheng Lan
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou, 510006, China
| | - Kai Han
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, 410073, China.
- State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Changsha, 410073, China.
- Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha, 410073, China.
| | - Hongyan Wang
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, 410073, China.
- State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Changsha, 410073, China.
- Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha, 410073, China.
| | - Xiaojun Xu
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, 410073, China
- State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Changsha, 410073, China
- Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha, 410073, China
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5
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Manivanh R, Lakdawala SS, Jones JE. Three-Dimensional Simultaneous Imaging of Nucleic Acids and Proteins During Influenza Virus Infection in Single Cells Using Confocal Microscopy. Methods Mol Biol 2022; 2440:41-56. [PMID: 35218531 DOI: 10.1007/978-1-0716-2051-9_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Three-dimensional imaging is a powerful tool for examining the spatial distribution of intracellular molecules like nucleic acids, proteins, and organelles in cells and tissues. Multicolor fluorescence imaging coupled with three-dimensional spatial information provide a platform to explore the relationship between different cellular features and molecules. We have previously developed a pipeline to study the intracellular localization of influenza virus genomic segments within an infected cell. Here, we describe the staining of multiple viral RNA segments in cells infected with influenza virus by combined fluorescence in situ hybridization (FISH) and immunofluorescence and quantification of colocalization between viral segments. This chapter will cover the acquisition and analysis of 3D images by the widely used laser scanning confocal microscope. These strategies can be applied to a wide range of biological processes and modified to examine colocalization of other cellular features.
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6
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Lin Y, Zhan Y, Luo F, Lin C, Wang J, Qiu B, Lin Z. Multicolor hydrogen sulfide sensor for meat freshness assessment based on Cu 2+-modified boron nitride nanosheets-supported subnanometer gold nanoparticles. Food Chem 2022; 381:132278. [PMID: 35139466 DOI: 10.1016/j.foodchem.2022.132278] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Revised: 01/14/2022] [Accepted: 01/26/2022] [Indexed: 12/15/2022]
Abstract
Hydrogen sulfide (H2S) has emerged as an important indicator in the spoilage process of meat. In this study, a mimetic enzyme based on Cu2+-modified boron nitride nanosheets-supported gold nanoparticles (AuNPs/Cu2+-BNNS) was synthesized, which can be used to catalyze the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB). The H2S gas can inhibit the activity of AuNPs/Cu2+-BNNS toward catalytic oxidation of TMB. Meanwhile, the usage of headspace method could avoid most interferences in the rotten sample. Various concentrations of TMB+ could change the aspect ratio of the gold nanoroads (AuNRs), which results in vivid color changing and UV-vis spectra shifting. The sensor had a good linear relationship with H2S concentration ranging from 10.0 to 90.0 μmol/L, and the detection limit is 7.8 μmol/L. The AuNPs/Cu2+-BNNS sensors were successfully applied to detect H2S produced by meat spoilage with satisfying results.
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Affiliation(s)
- Yisheng Lin
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Yuanjin Zhan
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Fang Luo
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Cuiying Lin
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Jian Wang
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Bin Qiu
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Zhenyu Lin
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China.
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7
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Kunz L, Coutu DL. Multicolor 3D Confocal Imaging of Thick Tissue Sections. Methods Mol Biol 2021; 2350:95-104. [PMID: 34331281 DOI: 10.1007/978-1-0716-1593-5_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
Abstract
In multicellular organisms, most physiological and pathological processes involve an interplay between various cells and molecules that act both locally and systemically. To understand how these complex and dynamic processes occur in time and space, imaging techniques are key. Advances in tissue processing techniques and microscopy now allow us to probe these processes at a large scale and at the same time at a level of detail previously unachievable. Indeed, it is now possible to reliably quantify multiple protein expression levels at single-cell resolution in whole organs using three-dimensional fluorescence imaging techniques. Here we describe a method to prepare adult mouse bone tissue for multiplexed confocal imaging of thick tissue sections. Up to eight different fluorophores can be multiplexed using this technique and spectrally resolved using standard confocal microscopy. The optical clearing method described allows detection of these fluorophores up to a depth of >700 μm in the far-red. Although the method was initially developed for bone tissue imaging, we have successfully applied it to several other tissue types.
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8
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Suzuki K, Hossain MN, Matsuda T, Nagai T. Multicolor Bioluminescence Imaging of Subcellular Structures and Multicolor Calcium Imaging in Single Living Cells. Methods Mol Biol 2021; 2350:229-37. [PMID: 34331288 DOI: 10.1007/978-1-0716-1593-5_14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The recent development of the bright luciferase NanoLuc (Nluc) has greatly improved the sensitivity of bioluminescence imaging, enabling real-time cellular imaging with high spatial resolution. However, the limited color variants of Nluc have restricted its wider application to multicolor imaging of biological phenomena. To address this issue, we developed five new spectral variants of the bright bioluminescent protein with emissions across the visible spectrum. In this chapter, we describe the following two protocols for single-cell bioluminescence imaging: (a) multicolor bioluminescence imaging of subcellular structures and (b) multicolor calcium imaging in single living cells.
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9
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Ren J, Tao F, Lu X, Zhang H, Gai L, Liu L, Jiang H. Biomass-based superhydrophobic coating with tunable colors and excellent robustness. Carbohydr Polym 2021; 270:118401. [PMID: 34364634 DOI: 10.1016/j.carbpol.2021.118401] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 06/30/2021] [Accepted: 06/30/2021] [Indexed: 12/21/2022]
Abstract
Multicolored superhydrophobic coating with high durability has been receiving tremendous attention in decorative applications. Herein, a facile method to fabricate multicolored superhydrophobic coating with excellent robustness has been developed by using cellulose and chitosan. The multicolored coatings can be obtained through single dyeing or mixed dyeing based on three primary dyes. The coating can be applied on hard substrates (e.g. glass, aluminum sheet) and soft substrates (e.g. cotton fabric) by diverse methods including spraying, dip-coating and painting. The colorful coating firmly adheres to the substrates due to the multiple interactions (siloxane covalent bonds and hydrogen bonds). The colorful coating exhibits water-repellant behaviors and can withstand sandpaper abrasion, tape-peeling cycles, water impact, salt spray test and UV environments. Furthermore, the multicolored coating can be used as a new type of pigment for painting on different substrates and is expected to have a huge potential application in technological design or decoration.
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Mei W, Liu X, Zou L, Wang Q, Yang X, Wang K. Microcapillary-based multicolor assay for quantitative and sensitive point-of-care testing of proteins. Biosens Bioelectron 2021; 189:113370. [PMID: 34090153 DOI: 10.1016/j.bios.2021.113370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 05/02/2021] [Accepted: 05/23/2021] [Indexed: 10/21/2022]
Abstract
A microcapillary-based multicolor assay was developed for proteins quantification in serum sample with the assistance of manual centrifugal platform. The proposed assay only required the operation of "one suction and one extrusion" to realize the target detection. Myoglobin (Myo), a biomarker in the early stage of acute myocardial infarction (AMI), was chosen as the model target. The microcapillary was first modified with polydopamine (PDA), then Myo aptamer was immobilized on the PDA modified microcapillary and hybridized with glucose oxidase (Gox) functionalized DNA probe (DNA-Gox). The step "one suction" referred to the inhalation of the sample into the functionalized microcapillary. Then the target Myo in the sample could bind to the Myo aptamer on the microcapillary so that DNA-Gox complexes were released from the microcapillary into solution. Through the step "one extrusion", the DNA-Gox complexes in the solution could catalyze glucose to generate hydrogen peroxide, and then the etching of gold nanorods (AuNRs) was initiated, causing a color change from brown to yellow. According to the color change based on the etching of AuNRs, as low as 0.1 nM Myo was detected with naked eyes. Combined with the manual centrifugal platform, even the Myo in the serum samples could be detected without power supply. It was expected to build a universal and adaptable sensing platform for different targets more quickly and efficiently.
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Affiliation(s)
- Wenjing Mei
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, 410082, China
| | - Xiaofeng Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, 410082, China
| | - Liyuan Zou
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, 410082, China
| | - Qing Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, 410082, China.
| | - Xiaohai Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, 410082, China.
| | - Kemin Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, 410082, China
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Nahidiazar L, Harkes R. Multicolor Localization-Based Super Resolution Microscopy. Methods Mol Biol 2021; 2350:69-76. [PMID: 34331279 DOI: 10.1007/978-1-0716-1593-5_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Super Resolution (SR) microscopy has become a powerful tool to study cellular architecture at the nanometer scale. Single molecule localization microscopy (SMLM) is a method in which fluorophore labels repeatedly switch On and Off ("blink"). Their exact locations are estimated by computing the centers of individual blinks. Therefore, the image quality depends on the density of the detected labels, as well as the accuracy of the estimation of their location. Both are influenced by several factors. Here we present a step-by-step method that optimizes many of these factors to facilitate multicolor imaging.
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Affiliation(s)
| | - Rolf Harkes
- Netherlands Cancer Institute, Amsterdam, Netherlands.
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12
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Jia Y, Bleicher F, Reboulet J, Merabet S. Bimolecular Fluorescence Complementation (BiFC) and Multiplexed Imaging of Protein-Protein Interactions in Human Living Cells. Methods Mol Biol 2021; 2350:173-190. [PMID: 34331286 DOI: 10.1007/978-1-0716-1593-5_12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Deciphering protein-protein interactions (PPIs) in vivo is crucial to understand protein function. Bimolecular fluorescence complementation (BiFC) makes applicable the analysis of PPIs in many different native contexts, including human live cells. It relies on the property of monomeric fluorescent proteins to be reconstituted from two separate subfragments upon spatial proximity. Candidate partners fused to such complementary subfragments can form a fluorescent protein complex upon interaction, allowing visualization of weak and transient PPIs. It can also be applied for investigation of distinct PPIs at the same time using a multicolor setup. In this chapter, we provide a detailed protocol for analyzing PPIs by doing BiFC in cultured cells. Proof-of-principle experiments rely on the complementation property between the N-terminal fragment of mVenus (designated VN173) and the C-terminal fragment of mCerulean (designated CC155) and the partnership between HOXA7 and PBX1 proteins. This protocol is compatible with any other fluorescent complementation pair fragments and any type of candidate interacting proteins.
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Affiliation(s)
- Yunlong Jia
- Institut de Génomique Fonctionnelle de Lyon, UMR5242, Université Lyon 1, CNRS, Ecole Normale Supérieure de Lyon, Lyon Cedex 07, France
| | - Françoise Bleicher
- Institut de Génomique Fonctionnelle de Lyon, UMR5242, Université Lyon 1, CNRS, Ecole Normale Supérieure de Lyon, Lyon Cedex 07, France
| | - Jonathan Reboulet
- Institut de Génomique Fonctionnelle de Lyon, UMR5242, Université Lyon 1, CNRS, Ecole Normale Supérieure de Lyon, Lyon Cedex 07, France
| | - Samir Merabet
- Institut de Génomique Fonctionnelle de Lyon, UMR5242, Université Lyon 1, CNRS, Ecole Normale Supérieure de Lyon, Lyon Cedex 07, France.
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Abstract
Quantum dots have attracted a great deal of attention among researchers in optical imaging because of their unique physicochemical properties. Their adjustable size allows quantum dots to emit visible fluorescence with different wavelengths excited by a single light source, allowing them to play an unmatched role in multitarget simultaneous multicolor imaging of tissues and cells compared with other molecular biotechnologies and traditional fluorescent materials. This technology affords real-time observation in situ of multiple biomarkers, allowing us to quantify their expression levels, and helping us to gain a deeper understanding of the interactions among biomolecules and the relationship between biomolecules and disease occurrence, progression, and prognosis. This has potential to aid in clinical diagnosis and treatment decision making.
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Abstract
Intracellular cytokine staining is a popular method for visualizing cellular responses, most often T-cell responses to antigenic or mitogenic stimulation. It can be coupled with staining for other functional markers, such as upregulation of CD107 or CD154, as well as phenotypic markers that define specific cellular subsets, e.g., effector and memory T-cell compartments, NK cells, or monocytes. Recent advances in multicolor flow cytometry instrumentation and software have allowed the routine combination of 12 or more markers, creating some technical and analytical challenges along the way, and exposing a need for standardization in the field. Here, we will review best practices for antibody panel design and procedural variables for multicolor intracellular cytokine staining, and present an optimized protocol with variations designed for use with specific markers and sample types.
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Affiliation(s)
- Patricia Lovelace
- Human Immune Monitoring Center, Institute for Immunity, Transplantation, and Infection, Stanford University, Fairchild Science Building, 299 Campus Drive, Stanford, CA, 94305-5124, USA
| | - Holden T Maecker
- Human Immune Monitoring Center, Institute for Immunity, Transplantation, and Infection, Stanford University, Fairchild Science Building, 299 Campus Drive, Stanford, CA, 94305-5124, USA.
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Knol-Blankevoort VT, Mezzanotte L, Rabelink MJWE, Löwik CWGM, Kaijzel EL. Development of a Multicolor Bioluminescence Imaging Platform to Simultaneously Investigate Transcription Factor NF-κB Signaling and Apoptosis. Methods Mol Biol 2016; 1461:255-70. [PMID: 27424911 DOI: 10.1007/978-1-4939-3813-1_21] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Here we describe a novel multicolor bioluminescent imaging platform that enables us to simultaneously investigate transcription factor nuclear factor-κB (NF-κB) signalling and apoptosis. We genetically modified the human breast cancer cell line MDA-MB-231 to express green, red, and blue light-emitting luciferases to monitor cell number and viability, NF-κB promoter activity, and to enable specific cell sorting and detection, respectively. Z-DEVD-animoluciferin, the pro-luciferin substrate, was used to determine apoptotic caspase 3/7 activity. We used this multicolored cell line for the in vitro evaluation of natural compounds and in vivo optical imaging of tumor necrosis factor (TNFα)-induced NF-κB activation (Mezzanotte et al., PLoS One 9:e85550, 2014).
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Affiliation(s)
- Vicky T Knol-Blankevoort
- Department of Radiology, Leiden University Medical Center, Albinusdreef 2, PO Box 9600, 2300RC, Leiden, The Netherlands
| | - Laura Mezzanotte
- Department of Radiology, Leiden University Medical Center, Albinusdreef 2, PO Box 9600, 2300RC, Leiden, The Netherlands
| | - Martijn J W E Rabelink
- Department of Molecular Cell Biology, Leiden University Medical Center, Leiden, The Netherlands
| | - Clemens W G M Löwik
- Department of Radiology, Leiden University Medical Center, Albinusdreef 2, PO Box 9600, 2300RC, Leiden, The Netherlands
| | - Eric L Kaijzel
- Department of Radiology, Leiden University Medical Center, Albinusdreef 2, PO Box 9600, 2300RC, Leiden, The Netherlands.
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Abstract
Super-resolution (SR) methodologies permit the visualization of cellular structures at near-molecular scale (1-30 nm), enabling novel mechanistic analysis of key events in cell biology not resolvable by conventional fluorescence imaging (∼300-nm resolution). When this level of detail is combined with computing power and fast and reliable analysis software, high-content screenings using SR becomes a practical option to address multiple biological questions. The importance of combining these powerful analytical techniques cannot be ignored, as they can address phenotypic changes on the molecular scale and in a statistically robust manner. In this work, we suggest an easy-to-implement protocol that can be applied to set up a high-content 3D SR experiment with user-friendly and freely available software. The protocol can be divided into two main parts: chamber and sample preparation, where a protocol to set up a direct STORM (dSTORM) sample is presented; and a second part where a protocol for image acquisition and analysis is described. We intend to take the reader step-by-step through the experimental process highlighting possible experimental bottlenecks and possible improvements based on recent developments in the field.
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Affiliation(s)
- Pedro M Pereira
- MRC Laboratory for Molecular Cell Biology and Department of Cell and Developmental Biology, University College London, London, UK
| | - Pedro Almada
- MRC Laboratory for Molecular Cell Biology and Department of Cell and Developmental Biology, University College London, London, UK
| | - Ricardo Henriques
- MRC Laboratory for Molecular Cell Biology and Department of Cell and Developmental Biology, University College London, London, UK
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