1
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Han D, Goudeau B, Manojlovic D, Jiang D, Fang D, Sojic N. Electrochemiluminescence Loss in Photobleaching. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015030] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Dongni Han
- University of Bordeaux Bordeaux INP ISM, UMR CNRS 5255 33607 Pessac France
- School of Pharmacy and Key Laboratory of Targeted Intervention of Cardiovascular Disease Collaborative Innovation Center for Cardiovascular Disease Translational Medicine Nanjing Medical University Nanjing Jiangsu 211126 China
| | - Bertrand Goudeau
- University of Bordeaux Bordeaux INP ISM, UMR CNRS 5255 33607 Pessac France
| | - Dragan Manojlovic
- Department of Chemistry South Ural State University Chelyabinsk 454080 Russian Federation
| | - Dechen Jiang
- State Key Laboratory of Analytical Chemistry for Life and School of Chemistry and Chemical Engineering Nanjing University Nanjing Jiangsu 210093 China
| | - Danjun Fang
- School of Pharmacy and Key Laboratory of Targeted Intervention of Cardiovascular Disease Collaborative Innovation Center for Cardiovascular Disease Translational Medicine Nanjing Medical University Nanjing Jiangsu 211126 China
| | - Neso Sojic
- University of Bordeaux Bordeaux INP ISM, UMR CNRS 5255 33607 Pessac France
- Department of Chemistry South Ural State University Chelyabinsk 454080 Russian Federation
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2
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Han D, Goudeau B, Manojlovic D, Jiang D, Fang D, Sojic N. Electrochemiluminescence Loss in Photobleaching. Angew Chem Int Ed Engl 2021; 60:7686-7690. [PMID: 33410245 DOI: 10.1002/anie.202015030] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/04/2020] [Indexed: 12/11/2022]
Abstract
The effects of photobleaching on electrochemiluminescence (ECL) was investigated for the first time. The plasma membrane of Chinese Hamster Ovary (CHO) cells was labeled with a [Ru(bpy)3 ]2+ derivative. Selected regions of the fixed cells were photobleached using the confocal mode with sequential stepwise illumination or cumulatively and they were imaged by both ECL and photoluminescence (PL). ECL was generated with a model sacrificial coreactant, tri-n-propylamine. ECL microscopy of the photobleached regions shows lower ECL emission. We demonstrate a linear correlation between the ECL decrease and the PL loss due to the photobleaching of the labels immobilized on the CHO membranes. The presented strategy provides valuable information on the fundamentals of the ECL excited state and opens new opportunities for exploring cellular membranes by combining ECL microscopy with photobleaching techniques such as fluorescence recovery after photobleaching (FRAP) or fluorescence loss in photobleaching (FLIP) methods.
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Affiliation(s)
- Dongni Han
- University of Bordeaux, Bordeaux INP, ISM, UMR CNRS 5255, 33607, Pessac, France.,School of Pharmacy and Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, Jiangsu, 211126, China
| | - Bertrand Goudeau
- University of Bordeaux, Bordeaux INP, ISM, UMR CNRS 5255, 33607, Pessac, France
| | - Dragan Manojlovic
- Department of Chemistry, South Ural State University, Chelyabinsk, 454080, Russian Federation
| | - Dechen Jiang
- State Key Laboratory of Analytical Chemistry for Life and School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093, China
| | - Danjun Fang
- School of Pharmacy and Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, Jiangsu, 211126, China
| | - Neso Sojic
- University of Bordeaux, Bordeaux INP, ISM, UMR CNRS 5255, 33607, Pessac, France.,Department of Chemistry, South Ural State University, Chelyabinsk, 454080, Russian Federation
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3
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Abstract
Regulation of neurotransmitter receptor content at synapses is achieved through a dynamic equilibrium between biogenesis and degradation pathways, receptor stabilization at synaptic sites, and receptor trafficking in and out synapses. In the past 20 years, the movements of receptors to and from synapses have emerged as a series of highly regulated processes that mediate postsynaptic plasticity. Our understanding of the properties and roles of receptor movements has benefited from technological advances in receptor labeling and tracking capacities, as well as from new methods to interfere with their movements. Focusing on two key glutamatergic receptors, we review here our latest understanding of the characteristics of receptor movements and their role in tuning the efficacy of synaptic transmission in health and brain disease.
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Affiliation(s)
- Laurent Groc
- Interdisciplinary Institute for NeuroScience, CNRS, UMR 5297, Centre Broca Nouvelle-Aquitaine, 146, rue Léo-Saignat, 33076 Bordeaux, France
- IINS, University of Bordeaux, UMR5297, Bordeaux, France
| | - Daniel Choquet
- Interdisciplinary Institute for NeuroScience, CNRS, UMR 5297, Centre Broca Nouvelle-Aquitaine, 146, rue Léo-Saignat, 33076 Bordeaux, France
- IINS, University of Bordeaux, UMR5297, Bordeaux, France
- Bordeaux Imaging Center, UMS 3420 CNRS, US4 INSERM, University of Bordeaux, Bordeaux, France
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4
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Wang X, An L, Tian Q, Cui K. Recent progress in H2S activated diagnosis and treatment agents. RSC Adv 2019; 9:33578-33588. [PMID: 35528891 PMCID: PMC9073642 DOI: 10.1039/c9ra06698e] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2019] [Accepted: 10/03/2019] [Indexed: 12/13/2022] Open
Abstract
This review summarizes the recent advances in H2S detection probes and H2S-activated tumor treatment agents.
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Affiliation(s)
- Xiaodong Wang
- The Key Laboratory of Resource Chemistry of the Ministry of Education
- The Shanghai Key Laboratory of Rare Earth Functional Materials
- The Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors
- Shanghai Normal University
- Shanghai
| | - Lu An
- The Key Laboratory of Resource Chemistry of the Ministry of Education
- The Shanghai Key Laboratory of Rare Earth Functional Materials
- The Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors
- Shanghai Normal University
- Shanghai
| | - Qiwei Tian
- The Key Laboratory of Resource Chemistry of the Ministry of Education
- The Shanghai Key Laboratory of Rare Earth Functional Materials
- The Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors
- Shanghai Normal University
- Shanghai
| | - Kuili Cui
- Department of Tuberculosis
- The First Affiliated Hospital of Xinxiang Medical University
- China
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5
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Penjweini R, Andreoni A, Rosales T, Kim J, Brenner MD, Sackett DL, Chung JH, Knutson JR. Intracellular oxygen mapping using a myoglobin-mCherry probe with fluorescence lifetime imaging. JOURNAL OF BIOMEDICAL OPTICS 2018; 23:1-14. [PMID: 30298706 PMCID: PMC6210794 DOI: 10.1117/1.jbo.23.10.107001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 09/04/2018] [Indexed: 05/05/2023]
Abstract
Oxygen (O2) is one of the most important biometabolites. In abundance, it serves as the limiting terminus of aerobic respiratory chains in the mitochondria of higher organisms; in deficit, it is a potent determinant of development and regulation of other physiological and therapeutic processes. Most knowledge on intracellular and interstitial concentration ([O2]) is derived from mitochondria isolated from cells or tissue biopsies, providing detailed but nonnative insight into respiratory chain function. The possible loss of essential metabolites during isolation and disruption of the normal interactions of the organelle with the cytoskeleton may cause these data to misrepresent intact cells. Several optical methodologies were also developed, but they are often unable to detect heterogeneity of metabolic characteristics among different individual cells in the same culture, and most cannot detect heterogeneous consumption within different areas of a single cell. Here, we propose a noninvasive and highly sensitive fluorescence lifetime microscopy probe, myoglobin-mCherry, appropriate to intracellular targeting. Using our probe, we monitor mitochondrial contributions to O2 consumption in A549 nonsmall cell lung cancer cells and we reveal heterogeneous [O2] within the intracellular environments. The mitochondrial [O2] at a single-cell level is also mapped by adding a peptide to target the probe to the mitochondria.
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Affiliation(s)
- Rozhin Penjweini
- National Heart, Lung, and Blood Institute, National Institutes of Health, Laboratory of Advanced Microscopy and Biophotonics, Bethesda, Maryland, United States
| | - Alessio Andreoni
- National Heart, Lung, and Blood Institute, National Institutes of Health, Laboratory of Advanced Microscopy and Biophotonics, Bethesda, Maryland, United States
| | - Tilman Rosales
- National Heart, Lung, and Blood Institute, National Institutes of Health, Laboratory of Advanced Microscopy and Biophotonics, Bethesda, Maryland, United States
| | - Jeonghan Kim
- National Heart, Lung, and Blood Institute, National Institutes of Health, Laboratory of Obesity and Aging Research, Bethesda, Maryland, United States
| | - Michael D. Brenner
- National Heart, Lung, and Blood Institute, National Institutes of Health, Laboratory of Advanced Microscopy and Biophotonics, Bethesda, Maryland, United States
| | - Dan L. Sackett
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Cytoskeletal Dynamics Group, Division of Basic and Translational Biophysics, Bethesda, Maryland, United States
| | - Jay H. Chung
- National Heart, Lung, and Blood Institute, National Institutes of Health, Laboratory of Obesity and Aging Research, Bethesda, Maryland, United States
| | - Jay R. Knutson
- National Heart, Lung, and Blood Institute, National Institutes of Health, Laboratory of Advanced Microscopy and Biophotonics, Bethesda, Maryland, United States
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6
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Gao M, Li J, Nie C, Song B, Yan L, Qian H. Design, synthesis and biological evaluation of novel hydrogen sulfide releasing capsaicin derivatives. Bioorg Med Chem 2018; 26:2632-2639. [DOI: 10.1016/j.bmc.2018.04.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 04/13/2018] [Accepted: 04/13/2018] [Indexed: 12/15/2022]
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7
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Liu HW, Liu Y, Wang P, Zhang XB. Molecular engineering of two-photon fluorescent probes for bioimaging applications. Methods Appl Fluoresc 2017; 5:012003. [DOI: 10.1088/2050-6120/aa61b0] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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8
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Vasu AK, Paramasivam M, Kanvah S. Carbohydrate Tethered Cyanostilbene Fluorogen: Unique Emission and Preferential Protein Binding. ChemistrySelect 2017. [DOI: 10.1002/slct.201601709] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Anuji K Vasu
- Department of Chemistry; Indian Institute of Technology Gandhinagar, Palaj; Gandhinagar 382355, Gujarat
| | | | - Sriram Kanvah
- Department of Chemistry; Indian Institute of Technology Gandhinagar, Palaj; Gandhinagar 382355, Gujarat
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9
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Tron A, Pianet I, Martinez-Cuezva A, Tucker JHR, Pisciottani L, Alajarin M, Berna J, McClenaghan ND. Remote Photoregulated Ring Gliding in a [2]Rotaxane via a Molecular Effector. Org Lett 2016; 19:154-157. [DOI: 10.1021/acs.orglett.6b03457] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Arnaud Tron
- Institut
des Sciences Moléculaires, CNRS UMR 5255, Université de Bordeaux, 33405 Talence, France
| | - Isabelle Pianet
- Institut
des Sciences Moléculaires, CNRS UMR 5255, Université de Bordeaux, 33405 Talence, France
| | - Alberto Martinez-Cuezva
- Departamento
de Química Orgánica, Facultad de Química, Universidad de Murcia, E-30100 Murcia, Spain
| | - James H. R. Tucker
- School
of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Luca Pisciottani
- Institut
des Sciences Moléculaires, CNRS UMR 5255, Université de Bordeaux, 33405 Talence, France
| | - Mateo Alajarin
- Departamento
de Química Orgánica, Facultad de Química, Universidad de Murcia, E-30100 Murcia, Spain
| | - Jose Berna
- Departamento
de Química Orgánica, Facultad de Química, Universidad de Murcia, E-30100 Murcia, Spain
| | - Nathan D. McClenaghan
- Institut
des Sciences Moléculaires, CNRS UMR 5255, Université de Bordeaux, 33405 Talence, France
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10
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Nedosekin DA, Foster S, Nima ZA, Biris AS, Galanzha EI, Zharov VP. Photothermal confocal multicolor microscopy of nanoparticles and nanodrugs in live cells. Drug Metab Rev 2015; 47:346-55. [PMID: 26133539 PMCID: PMC5841921 DOI: 10.3109/03602532.2015.1058818] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Growing biomedical applications of non-fluorescent nanoparticles (NPs) for molecular imaging, disease diagnosis, drug delivery, and theranostics require new tools for real-time detection of nanomaterials, drug nano-carriers, and NP-drug conjugates (nanodrugs) in complex biological environments without additional labeling. Photothermal (PT) microscopy (PTM) has enormous potential for absorption-based identification and quantification of non-fluorescent molecules and NPs at a single molecule and 1.4 nm gold NP level. Recently, we have developed confocal PTM providing three-dimensional (3D) mapping and spectral identification of multiple chromophores and fluorophores in live cells. Here, we summarize recent advances in the application of confocal multicolor PTM for 3D visualization of single and clustered NPs, alone and in individual cells. In particular, we demonstrate identification of functionalized magnetic and gold-silver NPs, as well as graphene and carbon nanotubes in cancer cells and among blood cells. The potential to use PTM for super-resolution imaging (down to 50 nm), real-time NP tracking, guidance of PT nanotherapy, and multiplex cancer markers targeting, as well as analysis of non-linear PT phenomena and amplification of nanodrug efficacy through NP clustering and nano-bubble formation are also discussed.
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Affiliation(s)
- Dmitry A. Nedosekin
- Arkansas Nanomedicine Center, University of Arkansas for Medical Sciences, 4301 W. Markham St. Little Rock, AR 72205
| | - Stephen Foster
- Arkansas Nanomedicine Center, University of Arkansas for Medical Sciences, 4301 W. Markham St. Little Rock, AR 72205
| | - Zeid A. Nima
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, 2801 S. University Avenue, Little Rock, Arkansas 72204, USA
| | - Alexandru S. Biris
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, 2801 S. University Avenue, Little Rock, Arkansas 72204, USA
| | - Ekaterina I. Galanzha
- Arkansas Nanomedicine Center, University of Arkansas for Medical Sciences, 4301 W. Markham St. Little Rock, AR 72205
| | - Vladimir P. Zharov
- Arkansas Nanomedicine Center, University of Arkansas for Medical Sciences, 4301 W. Markham St. Little Rock, AR 72205
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11
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Yuasa J, Mukai R, Hasegawa Y, Kawai T. Ratiometric luminescence thermometry based on crystal-field alternation at the extremely narrow ⁵D₀ → ⁷F₂ transition band of europium(III). Chem Commun (Camb) 2015; 50:7937-40. [PMID: 24686443 DOI: 10.1039/c4cc00704b] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A dinuclear europium(III) complex with a structure of [BP-(Eu(III))2-(ODA)3] (BP = 2,2'-bipyridine-6,6'-dicarboxylic acid bis(N-hydroxy-succinimide) ester, ODA = diglycolic acid) shows a fully reversible emission spectral change at the extremely narrow (5)D0 → (7)F2 transition band in response to temperature changes ranging from 283 K to 333 K.
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Affiliation(s)
- Junpei Yuasa
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan.
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12
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Xiong B, Peng L, Cao X, He Y, Yeung ES. Optical analysis of biological hydrogen sulphide: an overview of recent advancements. Analyst 2015; 140:1763-71. [DOI: 10.1039/c4an02204a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
In this review we provide an overview of recent advancements in optical analysis of biological hydrogen sulphide, with a focus on fluorescence and non-fluorescence optical strategies for sensing and imaging subcellular hydrogen sulphide in living biosystems.
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Affiliation(s)
- Bin Xiong
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- College of Biology
- Hunan University
- Changsha
| | - Lan Peng
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- College of Biology
- Hunan University
- Changsha
| | - Xuan Cao
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- College of Biology
- Hunan University
- Changsha
| | - Yan He
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- College of Biology
- Hunan University
- Changsha
| | - Edward S. Yeung
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- College of Biology
- Hunan University
- Changsha
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13
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Qiu Q, Deng X, Jiao L, Zhao T, Meng F, Huang W, Qian H. A High-Sensitivity Coumarin-Based Fluorescent Probe for Monitoring Hydrogen Sulfide in Living Cells. Chem Biol Drug Des 2014; 86:173-9. [DOI: 10.1111/cbdd.12483] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 11/09/2014] [Accepted: 11/20/2014] [Indexed: 12/16/2022]
Affiliation(s)
- Qianqian Qiu
- Center of Drug Discovery; State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjiaxiang Nanjing 210009 China
| | - Xin Deng
- Center of Drug Discovery; State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjiaxiang Nanjing 210009 China
| | - Lei Jiao
- Center of Drug Discovery; State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjiaxiang Nanjing 210009 China
| | - Tianxiao Zhao
- Center of Drug Discovery; State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjiaxiang Nanjing 210009 China
| | - Fanfei Meng
- Department of Pharmaceutics; State Key Laboratory of Natural Medicines; China Pharmaceutical University; Nanjing 210009 China
| | - Wenlong Huang
- Center of Drug Discovery; State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjiaxiang Nanjing 210009 China
| | - Hai Qian
- Center of Drug Discovery; State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjiaxiang Nanjing 210009 China
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14
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Shi XL, Mao GJ, Zhang XB, Liu HW, Gong YJ, Wu YX, Zhou LY, Zhang J, Tan W. Rhodamine-based fluorescent probe for direct bio-imaging of lysosomal pH changes. Talanta 2014; 130:356-62. [DOI: 10.1016/j.talanta.2014.07.030] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Revised: 07/03/2014] [Accepted: 07/10/2014] [Indexed: 11/29/2022]
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15
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Meng HM, Jin Z, Lv Y, Yang C, Zhang XB, Tan W, Yu RQ. Activatable two-photon fluorescence nanoprobe for bioimaging of glutathione in living cells and tissues. Anal Chem 2014; 86:12321-6. [PMID: 25399841 DOI: 10.1021/ac503617n] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Glutathione (GSH) serves vital cellular biological functions, and its abnormal levels are associated with many diseases. To better understand its physiological and pathological functions, efficient methods for monitoring of GSH in living systems are desired. Although quite a few small molecule-based and nanomaterial-based one photon fluorescence probes have been reported for GSH, two-photon (TP) probes, especially nanoprobes with good membrane permeability, are more favorable for bioimaging applications, since TP fluorescence imaging can provide improved spatial localization and increased imaging depth. In this work, we for the first time reported a "turn-on" TP fluorescence nanoprobe for efficient detection of GSH in aqueous solutions and TP excited fluorescence imaging of GSH in living cells and tissues. The nanoprobe consists of two-photon mesoporous silica nanoparticles (TP-MSNs) with a large TP excitation action cross-section (Φδ) value of 103 GM and MnO2 nanosheets, which show intense and broad optical absorption and could act as efficient quenchers for TP fluorescence. In the sensing system, the negatively charged MnO2 nanosheets are adsorbed on the positively charged MSNs through electrostatic interaction, resulting in efficient quenching of their fluorescence, with very low background fluorescence observed. The addition of GSH could reduce MnO2 into Mn(2+), lead to the decomposition of the MnO2 nanosheets, and thereby result in remarkable enhancement of both one photon and TP excited fluorescence of the nanosystem. The nanoprobe shows a highly sensitive response to GSH in aqueous solutions, with a detection limit of 200 nM achieved. It also exhibits a high selectivity toward GSH relative to other biomolecules and electrolytes, with good membrane permeability and excellent biocompatibility. The nanoprobe was successfully applied in monitoring the change of the intracellular GSH in living cells and tissues via TP fluorescence imaging, demonstrating its value of practical application in biological systems.
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Affiliation(s)
- Hong-Min Meng
- Molecular Sciences and Biomedicine Laboratory, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology, Collaborative Innovation Center for Chemistry and Molecular Medicine, Hunan University , Changsha, Hunan 410082, China
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16
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Dai Z, Tian L, Song B, Ye Z, Liu X, Yuan J. Ratiometric Time-Gated Luminescence Probe for Hydrogen Sulfide Based on Lanthanide Complexes. Anal Chem 2014; 86:11883-9. [DOI: 10.1021/ac503611f] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Zhichao Dai
- State Key Laboratory
of Fine Chemicals,
School of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Lu Tian
- State Key Laboratory
of Fine Chemicals,
School of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Bo Song
- State Key Laboratory
of Fine Chemicals,
School of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Zhiqiang Ye
- State Key Laboratory
of Fine Chemicals,
School of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Xiangli Liu
- State Key Laboratory
of Fine Chemicals,
School of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Jingli Yuan
- State Key Laboratory
of Fine Chemicals,
School of Chemistry, Dalian University of Technology, Dalian 116024, China
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17
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Zhang H, Fan J, Wang K, Li J, Wang C, Nie Y, Jiang T, Mu H, Peng X, Jiang K. Highly Sensitive Naphthalene-Based Two-Photon Fluorescent Probe for in Situ Real-Time Bioimaging of Ultratrace Cyclooxygenase-2 in Living Biosystems. Anal Chem 2014; 86:9131-8. [DOI: 10.1021/ac501944y] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Hua Zhang
- School
of Chemistry and Chemical Engineering, Henan Normal University, 46
Jianshe Road, Muye Zone, Xinxiang 453007, P.R. China
| | - Jiangli Fan
- State
Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Hi-Tech Zone, Dalian 116024, P.R. China
| | - Kui Wang
- School
of Chemistry and Chemical Engineering, Henan Normal University, 46
Jianshe Road, Muye Zone, Xinxiang 453007, P.R. China
| | - Jing Li
- School
of Chemistry and Chemical Engineering, Henan Normal University, 46
Jianshe Road, Muye Zone, Xinxiang 453007, P.R. China
| | - Caixia Wang
- School
of Chemistry and Chemical Engineering, Henan Normal University, 46
Jianshe Road, Muye Zone, Xinxiang 453007, P.R. China
| | - Yamin Nie
- School
of Chemistry and Chemical Engineering, Henan Normal University, 46
Jianshe Road, Muye Zone, Xinxiang 453007, P.R. China
| | - Tao Jiang
- School
of Chemistry and Chemical Engineering, Henan Normal University, 46
Jianshe Road, Muye Zone, Xinxiang 453007, P.R. China
| | - Huiying Mu
- State
Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Hi-Tech Zone, Dalian 116024, P.R. China
| | - Xiaojun Peng
- State
Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Hi-Tech Zone, Dalian 116024, P.R. China
| | - Kai Jiang
- School
of Chemistry and Chemical Engineering, Henan Normal University, 46
Jianshe Road, Muye Zone, Xinxiang 453007, P.R. China
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18
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Yao J, Yang M, Duan Y. Chemistry, Biology, and Medicine of Fluorescent Nanomaterials and Related Systems: New Insights into Biosensing, Bioimaging, Genomics, Diagnostics, and Therapy. Chem Rev 2014; 114:6130-78. [DOI: 10.1021/cr200359p] [Citation(s) in RCA: 592] [Impact Index Per Article: 59.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jun Yao
- Research
Center of Analytical Instrumentation, Analytical and Testing Center,
College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Mei Yang
- Research
Center of Analytical Instrumentation, Analytical and Testing Center,
College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yixiang Duan
- Research
Center of Analytical Instrumentation, Analytical and Testing Center,
College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
- Research
Center of Analytical Instrumentation, College of Life Sciences, Sichuan University, Chengdu, Sichuan 610064, China
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19
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Nedosekin DA, Galanzha EI, Dervishi E, Biris AS, Zharov VP. Super-resolution nonlinear photothermal microscopy. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:135-42. [PMID: 23864531 DOI: 10.1002/smll.201300024] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Revised: 03/12/2013] [Indexed: 05/04/2023]
Abstract
Super-resolution fluorescence microscopy enables imaging of fluorescent structures beyond the diffraction limit. However, this technique cannot be applied to weakly fluorescent cellular components or labels. As an alternative, photothermal microscopy based on nonradiative transformation of absorbed energy into heat has demonstrated imaging of nonfluorescent structures including single molecules and ~1-nm gold nanoparticles. However, previously photothermal imaging has been performed with a diffraction-limited resolution only. Herein, super-resolution, far-field photothermal microscopy based on nonlinear signal dependence on the laser energy is introduced. Among various nonlinear phenomena, including absorption saturation, multiphoton absorption, and signal temperature dependence, signal amplification by laser-induced nanobubbles around overheated nano-objects is explored. A Gaussian laser beam profile is used to demonstrate the image spatial sharpening for calibrated 260-nm metal strips, resolving of a plasmonic nanoassembly, visualization of 10-nm gold nanoparticles in graphene, and hemoglobin nanoclusters in live erythrocytes with resolution down to 50 nm. These nonlinear phenomena can be used for 3D imaging with improved lateral and axial resolution in most photothermal methods, including photoacoustic microscopy.
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Affiliation(s)
- Dmitry A Nedosekin
- Arkansas Nanomedicine Center, University of Arkansas for Medical Sciences, 4301 W. Markham St., Little Rock, AR 72205, USA
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20
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A fluorescent probe for Hg2+ sensing in solutions and living cells with a wide working pH range. CHINESE CHEM LETT 2014. [DOI: 10.1016/j.cclet.2013.10.027] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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21
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Zhang Y, Yue X, Kim B, Yao S, Bondar MV, Belfield KD. Bovine serum albumin nanoparticles with fluorogenic near-IR-emitting squaraine dyes. ACS APPLIED MATERIALS & INTERFACES 2013; 5:8710-7. [PMID: 23992402 PMCID: PMC3820157 DOI: 10.1021/am402361w] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Two squaraine (SQ) dyes, N-propanesulfonate-benzothiazolium squaraine (SQ-1) and N-propanesulfonate-benzoindolium squaraine (SQ-2), were synthesized with sulfonate groups to increase water solubility. Both dyes are almost nonfluorescent in aqueous solution with fluorescent quantum yields of 0.03, but exhibited fluorescence enhancement after noncovalently binding with bovine serum albumin (BSA). Upon addition of BSA, the fluorescence intensity increased by ca. a factor of 10, along with a 10-fold extension in the fluorescence lifetime. SQ-1 and SQ-2 interacted with BSA efficiently and appeared to show a preference for binding at site II, which involves combinational effects of electrostatic and hydrophobic interactions. The fluorogenic squaraine dyes were then used to label BSA, forming BSA-based nanoparticles (NPs) through noncovalent binding. The resulting BSA-SQ NPs exhibited enhanced near-IR fluorescence and reduced aggregation of the squaraine moiety. The BSA-SQ NPs were used for cell incubation and bioimaging studies. Confocal fluorescent images were obtained for HCT 116 cells incubated with the BSA-SQ NPs and LysoSensor Green, demonstrating the utility of the NP probes for intracellular imaging. This strategy ovecomes the generally low fluorescence emission of SQ dyes in water and aggregation-reduced fluorescence, providing a versatile strategy for sensing and imaging in biological environments.
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Affiliation(s)
- Yuanwei Zhang
- Department of Chemistry, University of Central Florida, P.O. Box 162366, Orlando, FL, 32816-2366, USA
| | - Xiling Yue
- Department of Chemistry, University of Central Florida, P.O. Box 162366, Orlando, FL, 32816-2366, USA
| | - Bosung Kim
- Department of Chemistry, University of Central Florida, P.O. Box 162366, Orlando, FL, 32816-2366, USA
| | - Sheng Yao
- Department of Chemistry, University of Central Florida, P.O. Box 162366, Orlando, FL, 32816-2366, USA
| | | | - Kevin D. Belfield
- Department of Chemistry, University of Central Florida, P.O. Box 162366, Orlando, FL, 32816-2366, USA
- CREOL, The College of Optics and Photonics, University of Central Florida, P.O. Box 162366, Orlando, FL, 32816-2366, USA
- Corresponding Author:
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22
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Mao GJ, Wei TT, Wang XX, Huan SY, Lu DQ, Zhang J, Zhang XB, Tan W, Shen GL, Yu RQ. High-Sensitivity Naphthalene-Based Two-Photon Fluorescent Probe Suitable for Direct Bioimaging of H2S in Living Cells. Anal Chem 2013; 85:7875-81. [DOI: 10.1021/ac401518e] [Citation(s) in RCA: 175] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Guo-Jiang Mao
- Molecular Science and Biomedicine
Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics,
College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Changsha 410082
| | - Tian-Tian Wei
- Molecular Science and Biomedicine
Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics,
College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Changsha 410082
| | - Xu-Xiang Wang
- Molecular Science and Biomedicine
Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics,
College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Changsha 410082
| | - Shuang-yan Huan
- Molecular Science and Biomedicine
Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics,
College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Changsha 410082
| | - Dan-Qing Lu
- Molecular Science and Biomedicine
Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics,
College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Changsha 410082
| | - Jing Zhang
- Molecular Science and Biomedicine
Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics,
College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Changsha 410082
| | - Xiao-Bing Zhang
- Molecular Science and Biomedicine
Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics,
College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Changsha 410082
| | - Weihong Tan
- Molecular Science and Biomedicine
Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics,
College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Changsha 410082
| | - Guo-Li Shen
- Molecular Science and Biomedicine
Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics,
College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Changsha 410082
| | - Ru-Qin Yu
- Molecular Science and Biomedicine
Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics,
College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Changsha 410082
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Suwa M, Nakano Y, Tsukahara S, Watarai H. Faraday rotation dispersion microscopy imaging of diamagnetic and chiral liquids with pulsed magnetic field. Anal Chem 2013; 85:5176-83. [PMID: 23581712 DOI: 10.1021/ac400541k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We have constructed an experimental setup for Faraday rotation dispersion imaging and demonstrated the performance of a novel imaging principle. By using a pulsed magnetic field and a polarized light synchronized to the magnetic field, quantitative Faraday rotation images of diamagnetic organic liquids in glass capillaries were observed. Nonaromatic hydrocarbons, benzene derivatives, and naphthalene derivatives were clearly distinguished by the Faraday rotation images due to the difference in Verdet constants. From the wavelength dispersion of the Faraday rotation images in the visible region, it was found that the resonance wavelength in the UV region, which was estimated based on the Faraday B-term, could be used as characteristic parameters for the imaging of the liquids. Furthermore, simultaneous acquisition of Faraday rotation image and natural optical rotation image was demonstrated for chiral organic liquids.
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Affiliation(s)
- Masayori Suwa
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka, Japan.
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24
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Zhang J, Fu Y, Conroy CV, Tang Z, Li G, Zhao RY, Wang G. Fluorescence Intensity and Lifetime Cell Imaging with Luminescent Gold Nanoclusters. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2012; 116:10.1021/jp306036y. [PMID: 24363815 PMCID: PMC3868212 DOI: 10.1021/jp306036y] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
In this article, luminescent properties of gold nanoclusters (AuNCs) were studied at the single nanoparticle level and also used as novel imaging agents in cell media. Two types of water-soluble AuNCs which were stabilized with a monolayer composed of either mercaptosuccinic acid (MSA) or tiopronin thiolate ligands were synthesized by a chemical reduction reaction. These AuNCs were determined to have an average core diameter of less than 2 nm. On a time-resolved confocal microscope, the emission signals from the single AuNCs were distinctly recordable. The quantum yields of these AuNCs were measured to be ca. 5%. The lifetime of these AuNCs is also much longer than the lifetime of cellular autofluorescence in lifetime cell imaging as well as the lifetime of organic dye Alexa Fluor 488. After being derivatized with polyethylene glycol (PEG) moieties, the AuNCs were uploaded efficiently in the HeLa cells. Fluorescence intensity and lifetime cell images were recorded on the time-resolved confocal microscope in which the emission from the AuNCs was readily differentiated from the cellular autofluorescence background because of their relatively stronger emission intensities and longer lifetimes. These loaded nanoclusters in the cells were observed to widely distribute throughout the cells and especially densely loaded near the cell nucleuses. The AuNCs in the cells were also tested to have a better photostability relative to the organic fluorophores under the same conditions. We thus conclude that the AuNCs have a great potential as novel nanoparticle imaging agents, especially as lifetime imaging agents, in fluorescence imaging applications. We also prospect much broader applications of these AuNCs after further improvements of their luminescence quantum yields.
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Affiliation(s)
- Jian Zhang
- Center for Fluorescence Spectroscopy, University of Maryland School of Medicine, Department of Biochemistry and Molecular Biology, 725 West Lombard Street, Baltimore, Maryland 21201, United States
| | - Yi Fu
- Center for Fluorescence Spectroscopy, University of Maryland School of Medicine, Department of Biochemistry and Molecular Biology, 725 West Lombard Street, Baltimore, Maryland 21201, United States
| | - Cecil V. Conroy
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30302, United States
| | - Zhenghua Tang
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30302, United States
| | - Ge Li
- Division of Molecular Pathology, Department of Pathology, University of Maryland School of Medicine, 10 South Pine Street, Baltimore, Maryland 21201, United States
| | - Richard Y. Zhao
- Division of Molecular Pathology, Department of Pathology, University of Maryland School of Medicine, 10 South Pine Street, Baltimore, Maryland 21201, United States
- Department of Microbiology-Immunology, University of Maryland School of Medicine, 10 South Pine Street, Baltimore, Maryland 21201, United States
- Institute of Human Virology, University of Maryland School of Medicine, 10 South Pine Street, Baltimore, Maryland 21201, United States
| | - Gangli Wang
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30302, United States
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25
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Gong YJ, Zhang XB, Zhang CC, Luo AL, Fu T, Tan W, Shen GL, Yu RQ. Through bond energy transfer: a convenient and universal strategy toward efficient ratiometric fluorescent probe for bioimaging applications. Anal Chem 2012; 84:10777-84. [PMID: 23171399 DOI: 10.1021/ac302762d] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Fluorescence resonance energy transfer (FRET) strategy has been widely applied in designing ratiometric probes for bioimaging applications. Unfortunately, for FRET systems, sufficiently large spectral overlap is necessary between the donor emission and the acceptor absorption, which would limit the resolution of double-channel images. The through-bond energy transfer (TBET) system does not need spectral overlap between donor and acceptor and could afford large wavelength difference between the two emissions with improved imaging resolution and higher energy transfer efficiency than that of the classical FRET system. It seems to be more favorable for designing ratiometric probes for bioimaging applications. In this paper, we have designed and synthesized a coumarin-rhodamine (CR) TBET system and demonstrated that TBET is a convenient strategy to design an efficient ratiometric fluorescent bioimaging probe for metal ions. Such TBET strategy is also universal, since no spectral overlap between the donor and the acceptor is necessary, and many more dye pairs than that of FRET could be chosen for probe design. As a proof-of-concept, Hg(2+) was chosen as a model metal ion. By combining TBET strategy with dual-switch design, the proposed sensing platform shows two well-separated emission peaks with a wavelength difference of 110 nm, high energy transfer efficiency, and a large signal-to-background ratio, which affords a high sensitivity for the probe with a detection limit of 7 nM for Hg(2+). Moreover, by employing an Hg(2+)-promoted desulfurization reaction as recognition unit, the probe also shows a high selectivity to Hg(2+). All these unique features make it particularly favorable for ratiometric Hg(2+) sensing and bioimaging applications. It has been preliminarily used for a ratiometric image of Hg(2+) in living cells and practical detection of Hg(2+) in river water samples with satisfying results.
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Affiliation(s)
- Yi-Jun Gong
- Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082
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26
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Nedosekin DA, Galanzha EI, Ayyadevara S, Shmookler Reis RJ, Zharov VP. Photothermal confocal spectromicroscopy of multiple cellular chromophores and fluorophores. Biophys J 2012; 102:672-81. [PMID: 22325291 PMCID: PMC3274827 DOI: 10.1016/j.bpj.2011.12.035] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2011] [Revised: 12/07/2011] [Accepted: 12/19/2011] [Indexed: 10/14/2022] Open
Abstract
Confocal fluorescence microscopy is a powerful biological tool providing high-resolution, three-dimensional (3D) imaging of fluorescent molecules. Many cellular components are weakly fluorescent, however, and thus their imaging requires additional labeling. As an alternative, label-free imaging can be performed by photothermal (PT) microscopy (PTM), based on nonradiative relaxation of absorbed energy into heat. Previously, little progress has been made in PT spectral identification of cellular chromophores at the 3D microscopic scale. Here, we introduce PTM integrating confocal thermal-lens scanning schematic, time-resolved detection, PT spectral identification, and nonlinear nanobubble-induced signal amplification with a tunable pulsed nanosecond laser. The capabilities of this confocal PTM were demonstrated for high-resolution 3D imaging and spectral identification of up to four chromophores and fluorophores in live cells and Caenorhabditis elegans. Examples include cytochrome c, green fluorescent protein, Mito-Tracker Red, Alexa-488, and natural drug-enhanced or genetically engineered melanin as a PT contrast agent. PTM was able to guide spectral burning of strong absorption background, which masked weakly absorbing chromophores (e.g., cytochromes in the melanin background). PTM provided label-free monitoring of stress-related changes to cytochrome c distribution, in C. elegans at the single-cell level. In nonlinear mode ultrasharp PT spectra from cyt c and the lateral resolution of 120 nm during calibration with 10-nm gold film were observed, suggesting a potential of PTM to break through the spectral and diffraction limits, respectively. Confocal PT spectromicroscopy could provide a valuable alternative or supplement to fluorescence microscopy for imaging of nonfluorescent chromophores and certain fluorophores.
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Affiliation(s)
- Dmitry A Nedosekin
- Phillips Classic Laser and Nanomedicine Laboratories, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA.
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27
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Steketee MB, Goldberg JL. Signaling endosomes and growth cone motility in axon regeneration. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2012; 106:35-73. [PMID: 23211459 DOI: 10.1016/b978-0-12-407178-0.00003-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
During development and regeneration, growth cones guide neurites to their targets by altering their motility in response to extracellular guidance cues. One class of cues critical to nervous system development is the neurotrophins. Neurotrophin binding to their cognate receptors stimulates their endocytosis into signaling endosomes. Current data indicate that the spatiotemporal localization of signaling endosomes can direct diverse processes regulating cell motility, including membrane trafficking, cytoskeletal remodeling, adhesion dynamics, and local translation. Recent experiments manipulating signaling endosome localization in neuronal growth cones support these views and place the neurotrophin signaling endosome in a central role regulating growth cone motility during axon growth and regeneration.
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28
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Heine M. Surface traffic in synaptic membranes. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2012; 970:197-219. [PMID: 22351057 DOI: 10.1007/978-3-7091-0932-8_9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The precision of signal transmission in chemical synapses is highly dependent on the structural alignment between pre- and postsynaptic components. The thermal agitation of transmembrane signaling molecules by surrounding lipid molecules and activity-driven changes in the local protein interaction affinities indicate a dynamic molecular traffic of molecules within synapses. The observation of local protein surface dynamics starts to be a useful tool to determine the contribution of intracellular and extracellular structures in organizing a plastic synapse. Local rearrangements by lateral diffusion in the synaptic and perisynaptic membrane induce fast density changes of signaling molecules and enable the synapse to change efficacy in short time scales. The degree of lateral mobility is restricted by many passive and active interactions inside and outside the membrane. AMPAR at the glutamatergic synapse are the best explored receptors in this respect and reviewed here as an example molecule. In addition, transsynaptic adhesion molecule complexes also appear highly dynamically in the synapse and do further support the importance of local surface traffic in subcellular compartments like synapses.
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Affiliation(s)
- Martin Heine
- Research Group Molecular Physiology, Leibniz Institute for Neurobiology, 39118 Magdeburg, Germany.
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29
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Si S, Leduc C, Delville MH, Lounis B. Short gold nanorod growth revisited: the critical role of the bromide counterion. Chemphyschem 2011; 13:193-202. [PMID: 22162413 DOI: 10.1002/cphc.201100710] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Indexed: 11/08/2022]
Abstract
A one-step, surfactant-assisted, seed-mediated method has been utilized for the growth of short gold nanorods with reasonable yield by modifying an established synthesis protocol. Among the various parameters that influence nanorod growth, the impact of the bromide counterion has been closely scrutinized. During this study it has been shown that, irrespective of its origin, the bromide counterion [cetyltrimethylammonium bromide (CTAB) or NaBr] plays a crucial role in the formation of nanorods in the sense that there is a critical [Br(-)]/[Au(3+)] ratio (around 200) to achieve nanorods with a maximum aspect ratio. Beyond this value, bromide can be considered as a poisoning agent unless shorter nanorods are required. The use of AgNO(3) helps in symmetry breaking for gold nanorod growth, whereas the bromide counterion controls the growth kinetics by selective adsorption on the facets of the growth direction. Thus, a proper balance between bromide ions and gold cations is also one of the necessary parameters for controlling the size of the gold nanorods; this has been discussed thoroughly. The results have been discussed based on their absorption spectra and finally shape evolution has been confirmed by TEM. Due to their efficient absorption in the near-IR region, these short nanorods were used in photothermal imaging of living COS-7 cells with improved signal-to-background ratios.
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Affiliation(s)
- Satyabrata Si
- Laboratoire Photonique Numérique et Nanosciences, Université de Bordeaux, Institut d'Optique Graduate School & CNRS, 351 cours de la libération, Talence, France
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Neurexin-neuroligin adhesions capture surface-diffusing AMPA receptors through PSD-95 scaffolds. J Neurosci 2011; 31:13500-15. [PMID: 21940442 DOI: 10.1523/jneurosci.6439-10.2011] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The mechanisms governing the recruitment of functional glutamate receptors at nascent excitatory postsynapses following initial axon-dendrite contact remain unclear. We examined here the ability of neurexin/neuroligin adhesions to mobilize AMPA-type glutamate receptors (AMPARs) at postsynapses through a diffusion/trap process involving the scaffold molecule PSD-95. Using single nanoparticle tracking in primary rat and mouse hippocampal neurons overexpressing or lacking neuroligin-1 (Nlg1), a striking inverse correlation was found between AMPAR diffusion and Nlg1 expression level. The use of Nlg1 mutants and inhibitory RNAs against PSD-95 demonstrated that this effect depended on intact Nlg1/PSD-95 interactions. Furthermore, functional AMPARs were recruited within 1 h at nascent Nlg1/PSD-95 clusters assembled by neurexin-1β multimers, a process requiring AMPAR membrane diffusion. Triggering novel neurexin/neuroligin adhesions also caused a depletion of PSD-95 from native synapses and a drop in AMPAR miniature EPSCs, indicating a competitive mechanism. Finally, both AMPAR level at synapses and AMPAR-dependent synaptic transmission were diminished in hippocampal slices from newborn Nlg1 knock-out mice, confirming an important role of Nlg1 in driving AMPARs to nascent synapses. Together, these data reveal a mechanism by which membrane-diffusing AMPARs can be rapidly trapped at PSD-95 scaffolds assembled at nascent neurexin/neuroligin adhesions, in competition with existing synapses.
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Yu C, Chen L, Zhang J, Li J, Liu P, Wang W, Yan B. “Off-On” based fluorescent chemosensor for Cu2+ in aqueous media and living cells. Talanta 2011; 85:1627-33. [DOI: 10.1016/j.talanta.2011.06.057] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Revised: 06/18/2011] [Accepted: 06/22/2011] [Indexed: 10/18/2022]
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Zhang J, Fu Y, Lakowicz JR. Fluorescent Metal Nanoshells: Lifetime-Tunable Molecular Probes in Fluorescent Cell Imaging. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2011; 115:7255-7260. [PMID: 21743823 PMCID: PMC3130523 DOI: 10.1021/jp111475y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
We reported the preparation of lifetime-tunable fluorescent metal nanoshells and used them as lifetime imaging agents for potential detection of multiple target molecules by a single cell imaging scan. These metal nanoshells were generated to have 40 nm silica cores and 10 nm silver shells. Three kinds of metal-ligand complexes tris(5-amino-1,10-phenanthroline)ruthenium(II) (Ru(NH(2)-Phen)(3) (2+)), tris(2,2'-bipyridine) ruthenium(II) (Ru(bpy)(3) (2+)), and tris(2,3-bis(2-pyridyl)pyrazine))ruthenium(II) (Ru(dpp)(3) (2+)) that have similar excitation and emission wavelengths but different lifetimes were respectively encapsulated in the cores of metal nanoshells for the purpose of fluorescence. Compared with the metal-free silica spheres, these metal nanoshells were found to display enhanced emission intensities and shortened lifetimes due to near-field interactions of Ru(II) complexes with the metal shells. The shortened lifetimes of these metal nanoshells were definitely unique relevant to the Ru(II) complexes: 10 ns for the Ru(Phen-NH(2))(3) (2+)-Ag nanoshells, 45 ns for the Ru(bpy)(3) (2+)-Ag nanoshells, and 200 ns for the Ru(dpp)(3) (2+)-Ag nanoshells. These lifetimes were longer than the lifetime of cellular autofluorescence (2 - 5 ns), so the emission signals of these metal nanoshells could be distinctly isolated from the cellular background on the lifetime cell images. Moreover, these lifetimes were also different from one another, resulting in the emission signals of three metal nanoshells could be distinguished from one another on the cell images. This feature may offer an opportunity to detect multiple target molecules in a single cell imaging scan when the metal nanoshells are bound with various targets in the cells.
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Affiliation(s)
- Jian Zhang
- Center for Fluorescence Spectroscopy, University of Maryland School of Medicine, Department of Biochemistry and Molecular Biology, 725 West Lombard Street, Baltimore, MD 21201
| | - Yi Fu
- Center for Fluorescence Spectroscopy, University of Maryland School of Medicine, Department of Biochemistry and Molecular Biology, 725 West Lombard Street, Baltimore, MD 21201
| | - Joseph R. Lakowicz
- Center for Fluorescence Spectroscopy, University of Maryland School of Medicine, Department of Biochemistry and Molecular Biology, 725 West Lombard Street, Baltimore, MD 21201
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Chen B, Estrada LC, Hellriegel C, Gratton E. Nanometer-scale optical imaging of collagen fibers using gold nanoparticles. BIOMEDICAL OPTICS EXPRESS 2011; 2:511-9. [PMID: 21412457 PMCID: PMC3047357 DOI: 10.1364/boe.2.000511] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Revised: 01/14/2011] [Accepted: 02/04/2011] [Indexed: 05/30/2023]
Abstract
We describe 3D single particle tracking of gold nanoparticles (AuNPs) moving along collagen fibers in aqueous environment with two-photon excitation conditions. The photoacoustic effect at the collagen fiber caused by the irradiation with ultrashort, near-infrared laser pulses propels the particles adsorbed to the surface of the collagen fibers. We report the tracking of individual AuNPs in three dimensions with high spatial and temporal resolution, of few nanometers and milliseconds, respectively. Due to the emission signal caused by the interaction between the AuNPs and the weak chromophores in the collagen fiber, the trajectories of individual AuNPs reveal the fiber topography with nanometric resolution. The intensity along the trajectory shows that we are sensitive to the distribution of the weak chromophores on the fiber.
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Affiliation(s)
- Bo Chen
- Laboratory for Fluorescence Dynamics, Biomedical Engineering Department, University of California, Irvine, USA.
| | - Laura C. Estrada
- Laboratory for Fluorescence Dynamics, Biomedical Engineering Department, University of California, Irvine, USA.
| | - Christian Hellriegel
- Laboratory for Fluorescence Dynamics, Biomedical Engineering Department, University of California, Irvine, USA.
- Microscopy and Dynamic Imaging Unit, CNIC (Centro Nacional de Investigaciones Cardiovasculares), Madrid, Spain
| | - Enrico Gratton
- Laboratory for Fluorescence Dynamics, Biomedical Engineering Department, University of California, Irvine, USA.
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34
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Ray PC, Yu H, Fu PP. Nanogold-based sensing of environmental toxins: excitement and challenges. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART C, ENVIRONMENTAL CARCINOGENESIS & ECOTOXICOLOGY REVIEWS 2011; 29:52-89. [PMID: 21424976 DOI: 10.1080/10590501.2011.551315] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
There have been tremendous advances in the past ten years on the development of various nanomaterials-based sensors for detection of environmental toxins. Nanogold is of special interest because of its unique shape- and size-dependent optical properties, hyper-quenching ability, super surface-enhanced Raman and dynamic light scattering, and surface-modifiability by small organic molecules and biomolecules. These unique optical properties of nanogold have been explored for ultra-sensitive detection, while its surface-modifiability has been explored for selectivity. In general, the nanogold-based sensors are highly selective and sensitive along with simple sample preparation and sensor design. In this review article, we intend to capture some of the recent advances in nanogold-based sensor development and mechanistic studies, especially for bacteria, heavy metals, and nitroaromatic compounds. Undoubtedly, these developments will generate a lot of excitement for environmental scientists and toxicologists as well as the general public.
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Affiliation(s)
- Paresh Chandra Ray
- Department of Chemistry and Biochemistry, Jackson State University, Jackson, MS 39217, USA.
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SOMEYA Y, YUI H. Measurements of Microproperties of Water Utilizing Charge-Transfer Dye Anilinonaphthalene Sulfonate. BUNSEKI KAGAKU 2011. [DOI: 10.2116/bunsekikagaku.60.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Yuu SOMEYA
- Department of Chemical Sciences and Technology, Graduate School of Chemical Sciences and Technology, Tokyo University of Science
| | - Hiroharu YUI
- Department of Chemical Sciences and Technology, Graduate School of Chemical Sciences and Technology, Tokyo University of Science
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36
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Hayashida O, Eguchi C, Kimura K, Oyama Y, Nakashima T, Shioji K. Guest Binding, Cellular Uptake, and Molecular Delivery of Water-soluble Cyclophanes Having a Pyrene Moiety. CHEM LETT 2010. [DOI: 10.1246/cl.2010.1321] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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37
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Mayyas E, Bernardo M, Runyan L, Sohail A, Subba-Rao V, Pantea M, Fridman R, Hoffmann PM. Dissociation Kinetics of an Enzyme−Inhibitor System Using Single-Molecule Force Measurements. Biomacromolecules 2010; 11:3352-8. [DOI: 10.1021/bm100844x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Essa Mayyas
- Department of Physics and Astronomy, and Department of Pathology and Karmanos Cancer Institute, Wayne State University, Detroit, Michigan 48201, United States
| | - Margarida Bernardo
- Department of Physics and Astronomy, and Department of Pathology and Karmanos Cancer Institute, Wayne State University, Detroit, Michigan 48201, United States
| | - Lindsay Runyan
- Department of Physics and Astronomy, and Department of Pathology and Karmanos Cancer Institute, Wayne State University, Detroit, Michigan 48201, United States
| | - Anjum Sohail
- Department of Physics and Astronomy, and Department of Pathology and Karmanos Cancer Institute, Wayne State University, Detroit, Michigan 48201, United States
| | - Venkatesh Subba-Rao
- Department of Physics and Astronomy, and Department of Pathology and Karmanos Cancer Institute, Wayne State University, Detroit, Michigan 48201, United States
| | - Mircea Pantea
- Department of Physics and Astronomy, and Department of Pathology and Karmanos Cancer Institute, Wayne State University, Detroit, Michigan 48201, United States
| | - Rafael Fridman
- Department of Physics and Astronomy, and Department of Pathology and Karmanos Cancer Institute, Wayne State University, Detroit, Michigan 48201, United States
| | - Peter M. Hoffmann
- Department of Physics and Astronomy, and Department of Pathology and Karmanos Cancer Institute, Wayne State University, Detroit, Michigan 48201, United States
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Someya Y, Yui H. Fluorescence lifetime probe for solvent microviscosity utilizing anilinonaphthalene sulfonate. Anal Chem 2010; 82:5470-6. [PMID: 20524653 DOI: 10.1021/ac100116j] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The correlation between the fluorescent dynamics of excited anilinonaphthalene sulfonate (ANS) and the microviscosity of solvent molecules surrounding ANS is investigated by time-resolved fluorescence spectroscopy. ANS has been widely used to probe the local hydrophobicity due to the drastic change in its intensity. It is revealed that the fluorescence lifetime from the charge transfer (CT) state of ANS sensitively reflects the microviscosity. The higher sensitivity of 2,6-ANS than of 1,8-ANS demonstrates that the spatial freedom of the rotating phenylamino group in the photoexcited ANS is an important factor that determines the sensitivity. As an application, the measurements of the microviscosity of water in biologically important systems, such as hyaluronan, gellan gum, and gelatin aqueous solutions are also presented. The present results suggest that the fluorescence lifetime of ANS enables the estimation of the solvent microviscosity and provide a useful probe molecule for fluorescence lifetime imaging microscopy.
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Affiliation(s)
- Yuu Someya
- Department of Chemistry, Faculty of Science, Tokyo University of Science, 12 Ichigaya-Funagawaramachi, Shinjyuku-ku, Tokyo 162-0826, Japan
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Boal F, Laguerre M, Milochau A, Lang J, Scotti PA. A charged prominence in the linker domain of the cysteine‐string protein Cspα mediates its regulated interaction with the calcium sensor synaptotagmin 9 during exocytosis. FASEB J 2010; 25:132-43. [DOI: 10.1096/fj.09-152033] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Frédéric Boal
- Department of BiochemistrySchool of Medical SciencesUniversity of BristolBristolUK
| | - Michel Laguerre
- Unité Mixte de Recherche Centre National de la Recherche Scientifique 5248Universitedé Bordeaux IPessacFrance
| | - Alexandra Milochau
- Unité Mixte de Recherche Centre National de la Recherche Scientifique 5248Universitedé Bordeaux IPessacFrance
| | - Jochen Lang
- Unité Mixte de Recherche Centre National de la Recherche Scientifique 5248Universitedé Bordeaux IPessacFrance
| | - Pier A. Scotti
- Unité Mixte de Recherche Centre National de la Recherche Scientifique 5248Universitedé Bordeaux IPessacFrance
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40
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Han ZX, Zhang XB, Li Z, Gong YJ, Wu XY, Jin Z, He CM, Jian LX, Zhang J, Shen GL, Yu RQ. Efficient fluorescence resonance energy transfer-based ratiometric fluorescent cellular imaging probe for Zn(2+) using a rhodamine spirolactam as a trigger. Anal Chem 2010; 82:3108-13. [PMID: 20334436 DOI: 10.1021/ac100376a] [Citation(s) in RCA: 219] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
This letter described the design and synthesis of a novel fluorescein-appended rhodamine spirolactam derivative and its preliminary application as a ratiometric fluorescent cellular imaging probe for Zn(2+). The ratiometric fluorescent signal change of the probe is based on an intramolecular fluorescence resonance energy transfer (FRET) mechanism modulated by a specific metal ion induced ring-opening process of the rhodamine spirolactam (acting as a trigger). In the new developed sensing system, the emission peaks of the two fluorophores are well-resolved, which can avoid the emission spectra overlap problem generally met by spectra-shift type probes and benefits for observation of fluorescence signal change at two different emission wavelengths with high resolution. It also benefits for a large range of emission ratios, thereby a high sensitivity for Zn(2+)detection. Under optimized experimental conditions, the probe exhibits a stable response for Zn(2+) over a concentration range from 2.0 x 10(-7) to 2.0 x 10(-5) M, with a detection limit of 4.0 x 10(-8) M. Most importantly, the novel probe has well solved the problem of serious interferences from other transition metal ions generally met by previously reported typical fluorescent probes for Zn(2+) with the di(2-picolyl)amine moiety as the receptor (in this case, the fluorescence response induced by Cd(2+)is even comparable to that of Zn(2+)) and shows a reversible and fast response toward Zn(2+). All these unique features make it particularly favorable for ratiometric cellular imaging investigations. It has been preliminarily used for ratiometric imaging of Zn(2+) in living cells with satisfying resolution.
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Affiliation(s)
- Zhi-Xiang Han
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha, 410082, PR China
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41
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Zhao Y, Zhang XB, Han ZX, Qiao L, Li CY, Jian LX, Shen GL, Yu RQ. Highly sensitive and selective colorimetric and off-on fluorescent chemosensor for Cu2+ in aqueous solution and living cells. Anal Chem 2010; 81:7022-30. [PMID: 19634898 DOI: 10.1021/ac901127n] [Citation(s) in RCA: 407] [Impact Index Per Article: 29.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The design and synthesis of a novel rhodamine spirolactam derivative and its application in fluorescent detections of Cu(2+) in aqueous solution and living cells are reported. The signal change of the chemosensor is based on a specific metal ion induced reversible ring-opening mechanism of the rhodamine spirolactam. It exhibits a highly sensitive "turn-on" fluorescent response toward Cu(2+) in aqueous solution with an 80-fold fluorescence intensity enhancement under 10 equiv of Cu(2+) added. This indicates that the synthesized chemosensor effectively avoided the fluorescence quenching for the paramagnetic nature of Cu(2+) via its strong binding capability toward Cu(2+). With the experimental conditions optimized, the probe exhibits a dynamic response range for Cu(2+) from 8.0 x 10(-7) to 1.0 x 10(-5) M, with a detection limit of 3.0 x 10(-7) M. The response of the chemosensor for Cu(2+) is instantaneous and reversible. Most importantly, both the color and fluorescence changes of the chemosensor are remarkably specific for Cu(2+) in the presence of other heavy and transition metal ions (even those that exist in high concentration), which meet the selective requirements for biomedical and environmental monitoring application. The proposed chemosensor has been used for direct measurement of Cu(2+) content in river water samples and imaging of Cu(2+) in living cells with satisfying results, which further demonstrates its value of practical applications in environmental and biological systems.
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Affiliation(s)
- Yan Zhao
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
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Affiliation(s)
- Mikhail Y. Berezin
- Department of Radiology, Washington University School of Medicine, 4525 Scott Ave, St. Louis, USA, Tel. 314-747-0701, 314-362-8599, fax 314-747-5191
| | - Samuel Achilefu
- Department of Radiology, Washington University School of Medicine, 4525 Scott Ave, St. Louis, USA, Tel. 314-747-0701, 314-362-8599, fax 314-747-5191
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43
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Wang W, Fu A, Lan J, Gao G, You J, Chen L. Rational Design of Fluorescent Bioimaging Probes by Controlling the Aggregation Behavior of Squaraines: A Special Effect of Ionic Liquid Pendants. Chemistry 2010; 16:5129-37. [DOI: 10.1002/chem.200903492] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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44
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Li CY, Zhang XB, Qiao L, Zhao Y, He CM, Huan SY, Lu LM, Jian LX, Shen GL, Yu RQ. Naphthalimide-porphyrin hybrid based ratiometric bioimaging probe for Hg2+: well-resolved emission spectra and unique specificity. Anal Chem 2010; 81:9993-10001. [PMID: 19904913 DOI: 10.1021/ac9018445] [Citation(s) in RCA: 104] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this paper, we unveil a novel naphthalimide-porphyrin hybrid based fluorescence probe (1) for ratiometric detection of Hg(2+) in aqueous solution and living cells. The ratiometric signal change of the probe is based on a carefully predesigned molecule containing two independent Hg(2+)-sensitive fluorophores with their maximal excitation wavelengths located at the same range, which shows reversibly specific ratiometric fluorescence responses induced by Hg(2+). In the new developed sensing system, the emissions of the two fluorophores are well-resolved with a 125 nm difference between two emission maxima, which can avoid the emission spectra overlap problem generally met by spectra-shift type probes and is especially favorable for ratiometric imaging intracellular Hg(2+). It also benefits from a large range of emission ratios and thereby a high sensitivity for Hg(2+) detection. Under optimized experimental conditions, the probe exhibits a stable response for Hg(2+) over a concentration range from 1.0 x 10(-7) to 5.0 x 10(-5) M, with a detection limit of 2.0 x 10(-8) M. The response of the probe toward Hg(2+) is reversible and fast (response time less than 2 min). Most importantly, the ratiometric fluorescence changes of the probe are remarkably specific for Hg(2+) in the presence of other abundant cellular metal ions (i.e., Na(+), K(+), Mg(2+), and Ca(2+)), essential transition metal ions in cells (such as Zn(2+), Fe(3+), Fe(2+), Cu(2+), Mn(2+), Co(2+), and Ni(2+)), and environmentally relevant heavy metal ions (Ag(+), Pb(2+), Cr(3+), and Cd(2+)), which meets the selective requirements for biomedical and environmental monitoring application. The recovery test of Hg(2+) in real water samples demonstrates the feasibility of the designed sensing system for Hg(2+) assay in practical samples. It has also been used for ratiometric imaging of Hg(2+) in living cells with satisfying resolution, which indicates that our novel designed probe has effectively avoided the general emission spectra overlap problem of other ratiometric probes.
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Affiliation(s)
- Chun-Yan Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
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Alcor D, Gouzer G, Triller A. Single-particle tracking methods for the study of membrane receptors dynamics. Eur J Neurosci 2009; 30:987-97. [PMID: 19735284 DOI: 10.1111/j.1460-9568.2009.06927.x] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Single-particle tracking (SPT) applications have been growing rapidly in the field of cell biology, and in particular in neurobiology, as a means of unravelling the involvement of diffusion dynamics of neurotransmitter receptors and other synaptic proteins in the regulation of neuronal activity. Suitable probes and technological improvements make SPT more accessible than it used to be and open up broad applications in cellular biology. In this technical highlight, we give an overview of the experimental approach in SPT. The concepts and results in neurobiology have already been the object of detailed reviews. Here, we focus on a qualitative description of the implementation of SPT, from molecule labelling to acquisition, data treatment and analysis of protein diffusion properties. Constraints, limitations and future developments are discussed.
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Affiliation(s)
- Damien Alcor
- Biologie Cellulaire de la Synapse, INSERM U789, Ecole Normale Supérieure, Paris, France
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46
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Zhang J, Fu Y, Liang D, Zhao RY, Lakowicz JR. Fluorescent avidin-bound silver particle: a strategy for single target molecule detection on a cell membrane. Anal Chem 2009; 81:883-9. [PMID: 19113832 PMCID: PMC2658604 DOI: 10.1021/ac801932m] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Cy5-avidin conjugate-bound silver nanoparticles were prepared as a fluorescence molecular reagent for the cell imaging. Compared with the metal-free avidin conjugate, the avidin-metal complex was observed to display a stronger emission intensity, shorter lifetime, and better photostability. The avidin-metal complexes were conjugated with the biotin-sites on the surfaces of PM1 cell lines, and the cell images were recorded using scanning confocal microscopy. It was noticed that the avidin-metal complexes bound on the cell surfaces could be identified as the isolated emission spots distinct from the cellular autofluorescence. The emission intensity over the cell image was increased with an increase of the number of avidin-metal complexes on the cell surface but the lifetime was decreased. A quantitative regression curve was achieved between the amount of avidin-metal complex on the cell surface and the emission intensity or lifetime over the entire cell image. On the basis of this curve, we expect to develop an approach that can be used to quantify the amount of target molecules on the cell surfaces using the cell intensity and lifetime images at the single cell level.
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Affiliation(s)
- Jian Zhang
- Center for Fluorescence Spectroscopy, University of Maryland School of Medicine, Department of Biochemistry and Molecular Biology, 725 West Lombard Street, Baltimore, Maryland 21201, USA
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Ray PC, Yu H, Fu PP. Toxicity and environmental risks of nanomaterials: challenges and future needs. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART C, ENVIRONMENTAL CARCINOGENESIS & ECOTOXICOLOGY REVIEWS 2009; 27:1-35. [PMID: 19204862 PMCID: PMC2844666 DOI: 10.1080/10590500802708267] [Citation(s) in RCA: 306] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Nanotechnology has gained a great deal of public interest because of the needs and applications of nanomaterials in many areas of human endeavors including industry, agriculture, business, medicine, and public health. Environmental exposure to nanomaterials is inevitable as nanomaterials become part of our daily life, and, as a result, nanotoxicity research is gaining attention. This review presents a summary of recent research efforts on fate, behavior, and toxicity of different classes of nanomaterials in the environment. A critical evaluation of challenges and future needs for the safe environmental nanotechnology are discussed.
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Affiliation(s)
- Paresh Chandra Ray
- Department of Chemistry, Jackson State University, Jackson, Mississippi 39217, USA.
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48
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Thoumine O. Interplay between adhesion turnover and cytoskeleton dynamics in the control of growth cone migration. Cell Adh Migr 2008; 2:263-7. [PMID: 19262147 DOI: 10.4161/cam.2.4.7274] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The migration of neuronal growth cones, driving axon extension, is a fascinating process which has been subject of intense investigation over several decades. Many of the key underlying molecules, in particular adhesion proteins at the cell membrane which allow for target recognition and binding, and cytoskeleton filaments and motors which power locomotion have been identified. However, the precise mechanisms by which growth cones coordinate, in time and space, the transmission of forces generated by the cytoskeleton to the turnover of adhesion proteins are still partly unresolved. To get a better grasp at these processes, we put here in relation the turnover rate of ligand/receptor adhesions and the degree of mechanical coupling between cell adhesion receptors and the actin rearward flow. These parameters were obtained recently for N-cadherin and IgCAM based adhesions using ligand-coated microspheres in combination with optical tweezers and photo-bleaching experiments. We show that the speed of growth cone migration requires both a fairly rapid adhesion dynamics and a strong physical connection between adhesive sites and the cytoskeleton.
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Affiliation(s)
- Olivier Thoumine
- CNRS UMR 5091, Institut Magendie, Université Bordeaux 2, Bordeaux, France.
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49
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Triller A, Choquet D. New Concepts in Synaptic Biology Derived from Single-Molecule Imaging. Neuron 2008; 59:359-74. [DOI: 10.1016/j.neuron.2008.06.022] [Citation(s) in RCA: 213] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2008] [Revised: 06/20/2008] [Accepted: 06/24/2008] [Indexed: 01/02/2023]
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