1
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Bancelin S, Mercier L, Roos J, Belkadi M, Pfeiffer T, Kim SK, Nägerl UV. Imaging dendritic spines in the hippocampus of a living mouse by 3D-stimulated emission depletion microscopy. NEUROPHOTONICS 2023; 10:044402. [PMID: 37215638 PMCID: PMC10197143 DOI: 10.1117/1.nph.10.4.044402] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/31/2023] [Accepted: 04/14/2023] [Indexed: 05/24/2023]
Abstract
Significance Stimulated emission depletion (STED) microscopy has been used to address a wide range of neurobiological questions in optically well-accessible samples, such as cell culture or brain slices. However, the application of STED to deeply embedded structures in the brain of living animals remains technically challenging. Aim In previous work, we established chronic STED imaging in the hippocampus in vivo but the gain in spatial resolution was restricted to the lateral plane. In our study, we report on extending the gain in STED resolution into the optical axis to visualize dendritic spines in the hippocampus in vivo. Approach Our approach is based on a spatial light modulator to shape the focal STED light intensity in all three dimensions and a conically shaped window that is compatible with an objective that has a long working distance and a high numerical aperture. We corrected distortions of the laser wavefront to optimize the shape of the bottle beam of the STED laser. Results We show how the new window design improves the STED point spread function and the spatial resolution using nanobeads. We then demonstrate the beneficial effects for 3D-STED microscopy of dendritic spines, visualized with an unprecedented level of detail in the hippocampus of a living mouse. Conclusions We present a methodology to improve the axial resolution for STED microscopy in the deeply embedded hippocampus in vivo, facilitating longitudinal studies of neuroanatomical plasticity at the nanoscale in a wide range of (patho-)physiological contexts.
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Affiliation(s)
- Stéphane Bancelin
- University of Bordeaux, CNRS, Interdisciplinary Institute for Neuroscience, IINS, UMR 5297, Bordeaux, France
| | - Luc Mercier
- University of Bordeaux, CNRS, Interdisciplinary Institute for Neuroscience, IINS, UMR 5297, Bordeaux, France
| | - Johannes Roos
- University of Bordeaux, CNRS, Interdisciplinary Institute for Neuroscience, IINS, UMR 5297, Bordeaux, France
| | - Mohamed Belkadi
- University of Bordeaux, CNRS, Interdisciplinary Institute for Neuroscience, IINS, UMR 5297, Bordeaux, France
| | - Thomas Pfeiffer
- University of Bordeaux, CNRS, Interdisciplinary Institute for Neuroscience, IINS, UMR 5297, Bordeaux, France
| | - Sun Kwang Kim
- Kyung Hee University, Graduate School, Department of Science in Korean Medicine, Seoul, Republic of Korea
| | - U. Valentin Nägerl
- University of Bordeaux, CNRS, Interdisciplinary Institute for Neuroscience, IINS, UMR 5297, Bordeaux, France
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2
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Jiang F, Bello ST, Gao Q, Lai Y, Li X, He L. Advances in the Electrophysiological Recordings of Long-Term Potentiation. Int J Mol Sci 2023; 24:ijms24087134. [PMID: 37108295 PMCID: PMC10138642 DOI: 10.3390/ijms24087134] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 04/01/2023] [Accepted: 04/06/2023] [Indexed: 04/29/2023] Open
Abstract
Understanding neuronal firing patterns and long-term potentiation (LTP) induction in studying learning, memory, and neurological diseases is critical. However, recently, despite the rapid advancement in neuroscience, we are still constrained by the experimental design, detection tools for exploring the mechanisms and pathways involved in LTP induction, and detection ability of neuronal action potentiation signals. This review will reiterate LTP-related electrophysiological recordings in the mammalian brain for nearly 50 years and explain how excitatory and inhibitory neural LTP results have been detected and described by field- and single-cell potentials, respectively. Furthermore, we focus on describing the classic model of LTP of inhibition and discuss the inhibitory neuron activity when excitatory neurons are activated to induce LTP. Finally, we propose recording excitatory and inhibitory neurons under the same experimental conditions by combining various electrophysiological technologies and novel design suggestions for future research. We discussed different types of synaptic plasticity, and the potential of astrocytes to induce LTP also deserves to be explored in the future.
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Affiliation(s)
- Feixu Jiang
- Department of Neuroscience, City University of Hong Kong, Kowloon, Hong Kong
| | | | - Qianqian Gao
- Department of Neuroscience, City University of Hong Kong, Kowloon, Hong Kong
| | - Yuanying Lai
- Department of Neuroscience, City University of Hong Kong, Kowloon, Hong Kong
| | - Xiao Li
- Department of Neuroscience, City University of Hong Kong, Kowloon, Hong Kong
- Research Institute of City University of Hong Kong, Shenzhen 518057, China
| | - Ling He
- Department of Neuroscience, City University of Hong Kong, Kowloon, Hong Kong
- Research Institute of City University of Hong Kong, Shenzhen 518057, China
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3
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Rouillon J, Ali LMA, Hadj-Kaddour K, Marie-Luce R, Simon G, Onofre M, Denis-Quanquin S, Jean M, Albalat M, Vanthuyne N, Micouin G, Banyasz A, Gary-Bobo M, Monnereau C, Andraud C. Assembly of Aggregation-Induced Emission Active Bola-Amphiphilic Macromolecules into Luminescent Nanoparticles Optimized for Two-Photon Microscopy In Vivo. Biomacromolecules 2022; 23:2485-2495. [PMID: 35608946 DOI: 10.1021/acs.biomac.2c00232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The (Z) and (E)-isomers of an extended tetraphenylethylene-based chromophore with optimized two-photon-induced luminescence properties are separated and functionalized with water-solubilizing pendant polymer groups, promoting their self-assembly in physiological media in the form of small, colloidal stable organic nanoparticles. The two resulting fluorescent suspensions are then evaluated as potential two-photon luminescent contrast agents for intravital epifluorescence and two-photon fluorescence microscopy. Comparisons with previously reported works involving similar fluorophores devoid of polymer side chains illustrate the benefits of later functionalization regarding the control of the self-assembly of the nano-objects and ultimately their biocompatibility toward the imaged organism.
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Affiliation(s)
- Jean Rouillon
- Univ. Lyon, ENS Lyon, CNRS, Laboratoire de Chimie, UMR 5182, 46 Allée d'Italie, 69364 Lyon, France
| | - Lamiaa M A Ali
- IBMM, Univ. Montpellier, CNRS, ENSCM, Montpellier 34293, France.,Department of Biochemistry Medical Research Institute, University of Alexandria, 21561 Alexandria, Egypt
| | | | - Raphaël Marie-Luce
- Univ. Lyon, ENS Lyon, CNRS, Laboratoire de Chimie, UMR 5182, 46 Allée d'Italie, 69364 Lyon, France
| | - Guillaume Simon
- Univ. Lyon, ENS Lyon, CNRS, Laboratoire de Chimie, UMR 5182, 46 Allée d'Italie, 69364 Lyon, France
| | - Mélanie Onofre
- IBMM, Univ. Montpellier, CNRS, ENSCM, Montpellier 34293, France
| | - Sandrine Denis-Quanquin
- Univ. Lyon, ENS Lyon, CNRS, Laboratoire de Chimie, UMR 5182, 46 Allée d'Italie, 69364 Lyon, France
| | - Marion Jean
- Aix Marseille University, CNRS, Centrale Marseille, iSm2, Marseille 13284, France
| | - Muriel Albalat
- Aix Marseille University, CNRS, Centrale Marseille, iSm2, Marseille 13284, France
| | - Nicolas Vanthuyne
- Aix Marseille University, CNRS, Centrale Marseille, iSm2, Marseille 13284, France
| | - Guillaume Micouin
- Univ. Lyon, ENS Lyon, CNRS, Laboratoire de Chimie, UMR 5182, 46 Allée d'Italie, 69364 Lyon, France
| | - Akos Banyasz
- Univ. Lyon, ENS Lyon, CNRS, Laboratoire de Chimie, UMR 5182, 46 Allée d'Italie, 69364 Lyon, France
| | | | - Cyrille Monnereau
- Univ. Lyon, ENS Lyon, CNRS, Laboratoire de Chimie, UMR 5182, 46 Allée d'Italie, 69364 Lyon, France
| | - Chantal Andraud
- Univ. Lyon, ENS Lyon, CNRS, Laboratoire de Chimie, UMR 5182, 46 Allée d'Italie, 69364 Lyon, France
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4
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Juvekar V, Lee HW, Kim HM. Two-Photon Fluorescent Probes for Detecting Enzyme Activities in Live Tissues. ACS APPLIED BIO MATERIALS 2021; 4:2957-2973. [PMID: 35014386 DOI: 10.1021/acsabm.1c00063] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Enzyme regulation is crucial in living organisms to catalyze various biosyntheses to maintain several physiological functions. On the contrary, abnormal enzyme activities can affect bioactivities leading to various serious disorders including cancer, Alzheimer's disease, Parkinson's disease, heart disease, and so on. This biological significance led to the development of various techniques to map specific enzyme activities in living systems to understand their role and distribution. Two-photon microscopy (TPM) in particular has emerged as a promising system for in situ real-time bioimaging owing to its robustness, high sensitivity, and noninvasiveness. It was achieved through the use of a two-photon (TP) light source of an optical window (700-1450 nm) beneficial in deeper light penetration and extraordinary spatial selectivity. Therefore, developing enzyme sensors utilized in TPM has significance in obtaining in vivo enzyme activities with minimal perturbation. The development of an efficient detection tool for enzymes has been continuously reported in the previous literature; here, we meticulously review the TP design strategies that have been attempted by researchers to develop enzyme TP fluorescent sensors that are proving very useful in providing insights for enzyme investigation in the biological system. In this review, the representative TP enzymatic probes that have been made in the past 5 years and their applications in tissue imaging are discussed in brief. In addition, the prospects and challenges of TP enzymatic probe development are also discussed.
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Affiliation(s)
- Vinayak Juvekar
- Department of Chemistry and Department of Energy Systems Research, Ajou University, Suwon 16499, South Korea
| | - Hyo Won Lee
- Department of Chemistry and Department of Energy Systems Research, Ajou University, Suwon 16499, South Korea
| | - Hwan Myung Kim
- Department of Chemistry and Department of Energy Systems Research, Ajou University, Suwon 16499, South Korea
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5
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Zhao J, Ellis-Davies GCR. Intracellular photoswitchable neuropharmacology driven by luminescence from upconverting nanoparticles. Chem Commun (Camb) 2020; 56:9445-9448. [PMID: 32761019 PMCID: PMC7812838 DOI: 10.1039/d0cc03956j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Photoswitchable drugs are small-molecule optical probes that undergo chromatically selective control of drug efficacy using, most often, UV-visible light. Here we report that luminescence produced by near-infrared stimulation of NaYF4:TmYb nanoparticles can be used for "remote control" of an azobenzene-based photochromic ion channel blocker of neurons in living brain slices.
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Affiliation(s)
- Jun Zhao
- Department of Neuroscience, Mount Sinai School of Medicine, New York, NY 10029, USA.
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6
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Yan H, Ren W, Liu S, Yu Y. Two-photon imaging of aptamer-functionalized Copolymer/TPdye fluorescent organic dots targeted to cancer cells. Anal Chim Acta 2020; 1106:199-206. [PMID: 32145849 DOI: 10.1016/j.aca.2020.02.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 02/03/2020] [Indexed: 10/25/2022]
Abstract
Fluorescent organic dots (O-dots) recently have emerged as a new class of promising contrast reagents for two-photon fluorescence (TPF) imaging. However, most of these developed two-photon absorption (TPA) O-dots have no tumor-targeting group, which hampers their wide application for targeted tumor imaging. Herein, we fabricated Sgc8c aptamer-mediated TPA O-dots as a proof-of-concept of the sensing platform for targeted imaging in live cells or deep tissues. The O-dots composed of trans-4-[p-(N, N-diethylamino)styryl]-4'-(dimethyl amino) stilbene (DEAS) emerged as TPA organic emissive cores and encapsulation by using poly (methyl methacrylate-co-methacrylic acid) (PMMA-co-MAA) as polymeric encapsulating matrix to form DEAS/PMMA-co-MAA O-dots via a co-precipitation strategy. The obtained O-dots enabled an extremely high TPA absorption cross-section, bright two-photon fluorescence (excitation at 720 nm; emission at 412 nm and 434 nm), excellent cell-permeability and high penetration depth. Sgc8c aptamer, as a protein tyrosine kinase-7 (PTK7) receptor-targetable ligand, was further anchored on the surface of O-dots to obtain DEAS/PMMA-co-MAA@Sgc8c nanoprobes by 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC)-mediated coupling reaction. Guided by Sgc8c aptamer, DEAS/PMMA-co-MAA@Sgc8c nanoprobes could be rapidly internalized into target acute lymphoblastic leukemia cells (CEM) cells with high specificity and great efficiency. It was also performed that two-photon images of TPA nanoprobes exhibited high two-photon brightness not only in target CEM cells, but also in mouse liver tissue slices even a depth of up to 210 μm. In our perception, it is highly promising that this nanoprobe provides a valuable tool for in vivo targeted imaging.
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Affiliation(s)
- Huijuan Yan
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan, 453003, PR China.
| | - Wu Ren
- School of Medical Engineering, Xinxiang Neurosense and Control Engineering Technology Research Center, Xinxiang Key Lab of Biomedical Information Research, Xinxiang Medical University, Xinxiang, Henan, 453003, PR China
| | - Shuanghui Liu
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan, 453003, PR China
| | - Yi Yu
- School of Medical Engineering, Xinxiang Neurosense and Control Engineering Technology Research Center, Xinxiang Key Lab of Biomedical Information Research, Xinxiang Medical University, Xinxiang, Henan, 453003, PR China
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7
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Two-Photon Excitation of Azobenzene Photoswitches for Synthetic Optogenetics. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10030805] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Synthetic optogenetics is an emerging optical technique that enables users to photocontrol molecules, proteins, and cells in vitro and in vivo. This is achieved by use of synthetic chromophores—denoted photoswitches—that undergo light-dependent changes (e.g., isomerization), which are meticulously designed to interact with unique cellular targets, notably proteins. Following light illumination, the changes adopted by photoswitches are harnessed to affect the function of nearby proteins. In most instances, photoswitches absorb visible light, wavelengths of poor tissue penetration, and excessive scatter. These shortcomings impede their use in vivo. To overcome these challenges, photoswitches of red-shifted absorbance have been developed. Notably, this shift in absorbance also increases their compatibility with two-photon excitation (2PE) methods. Here, we provide an overview of recent efforts devoted towards optimizing azobenzene-based photoswitches for 2PE and their current applications.
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8
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Hou MX, Liu LY, Wang KN, Chao XJ, Liu RX, Mao ZW. A molecular rotor sensor for detecting mitochondrial viscosity in apoptotic cells by two-photon fluorescence lifetime imaging. NEW J CHEM 2020. [DOI: 10.1039/d0nj02108c] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A two-photon fluorescent probe was developed for detecting mitochondrial viscosity during apoptosis of living cells by two-photon microscopy (TPM) and fluorescence lifetime imaging microscopy (FLIM) with good selectivity and highly biocompatible.
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Affiliation(s)
- Ming-Xuan Hou
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry
- Sun Yat-sen University
- Guangzhou
- P. R. China
| | - Liu-Yi Liu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry
- Sun Yat-sen University
- Guangzhou
- P. R. China
| | - Kang-Nan Wang
- Shunde Hospital of Southern Medical University (The First People's Hospital of Shunde)
- Foshan
- P. R. China
| | - Xi-Juan Chao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry
- Sun Yat-sen University
- Guangzhou
- P. R. China
| | - Rong-Xue Liu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry
- Sun Yat-sen University
- Guangzhou
- P. R. China
| | - Zong-Wan Mao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry
- Sun Yat-sen University
- Guangzhou
- P. R. China
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9
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Richers MT, Passlick S, Agarwal H, Ellis‐Davies GCR. Dendrimer Conjugation Enables Multiphoton Chemical Neurophysiology Studies with an Extended π‐Electron Caging Chromophore. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Matthew T. Richers
- Department of NeuroscienceMount Sinai School of Medicine New York NY 10029 USA
| | - Stefan Passlick
- Department of NeuroscienceMount Sinai School of Medicine New York NY 10029 USA
| | - Hitesh Agarwal
- Department of NeuroscienceMount Sinai School of Medicine New York NY 10029 USA
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10
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Richers MT, Passlick S, Agarwal H, Ellis-Davies GCR. Dendrimer Conjugation Enables Multiphoton Chemical Neurophysiology Studies with an Extended π-Electron Caging Chromophore. Angew Chem Int Ed Engl 2019; 58:12086-12090. [PMID: 31216109 PMCID: PMC6707848 DOI: 10.1002/anie.201906067] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Indexed: 12/19/2022]
Abstract
We have developed a caged neurotransmitter using an extended π-electron chromophore for efficient multiphoton uncaging on living neurons. Widely studied in a chemical context, such chromophores are inherently bioincompatible due to their highly lipophilic character. Attachment of two polycarboxylate dendrimers, a method we call "cloaking", to a bisstyrylthiophene (or BIST) core effectively transformed the chromophore into a water-soluble optical probe, whilst maintaining the high two-photon absorption of over 500 GM. Importantly, the cloaked caged compound was biologically inert at the high concentrations required for multiphoton chemical physiology. Thus, in contrast to non-cloaked BIST compounds, the BIST-caged neurotransmitter can be safely delivered onto neurons in acutely isolated brain slices, thereby enabling high-resolution two-photon uncaging without any side effects. We expect that our cloaking method will enable the development of new classes of cell-compatible photolabile probes using a wide variety of extended π-electron caging chromophores.
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Affiliation(s)
- Matthew T Richers
- Department of Neuroscience, Mount Sinai School of Medicine, New York, NY, 10029, USA
| | - Stefan Passlick
- Department of Neuroscience, Mount Sinai School of Medicine, New York, NY, 10029, USA
| | - Hitesh Agarwal
- Department of Neuroscience, Mount Sinai School of Medicine, New York, NY, 10029, USA
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11
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Pittolo S, Lee H, Lladó A, Tosi S, Bosch M, Bardia L, Gómez-Santacana X, Llebaria A, Soriano E, Colombelli J, Poskanzer KE, Perea G, Gorostiza P. Reversible silencing of endogenous receptors in intact brain tissue using 2-photon pharmacology. Proc Natl Acad Sci U S A 2019; 116:13680-13689. [PMID: 31196955 PMCID: PMC6613107 DOI: 10.1073/pnas.1900430116] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
The physiological activity of proteins is often studied with loss-of-function genetic approaches, but the corresponding phenotypes develop slowly and can be confounding. Photopharmacology allows direct, fast, and reversible control of endogenous protein activity, with spatiotemporal resolution set by the illumination method. Here, we combine a photoswitchable allosteric modulator (alloswitch) and 2-photon excitation using pulsed near-infrared lasers to reversibly silence metabotropic glutamate 5 (mGlu5) receptor activity in intact brain tissue. Endogenous receptors can be photoactivated in neurons and astrocytes with pharmacological selectivity and with an axial resolution between 5 and 10 µm. Thus, 2-photon pharmacology using alloswitch allows investigating mGlu5-dependent processes in wild-type animals, including synaptic formation and plasticity, and signaling pathways from intracellular organelles.
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Affiliation(s)
- Silvia Pittolo
- Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology, 08028 Barcelona, Spain
| | - Hyojung Lee
- Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology, 08028 Barcelona, Spain
| | - Anna Lladó
- Institute for Research in Biomedicine (IRB Barcelona), Barcelona Institute of Science and Technology, 08028 Barcelona, Spain
| | - Sébastien Tosi
- Institute for Research in Biomedicine (IRB Barcelona), Barcelona Institute of Science and Technology, 08028 Barcelona, Spain
| | - Miquel Bosch
- Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology, 08028 Barcelona, Spain
| | - Lídia Bardia
- Institute for Research in Biomedicine (IRB Barcelona), Barcelona Institute of Science and Technology, 08028 Barcelona, Spain
| | - Xavier Gómez-Santacana
- Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology, 08028 Barcelona, Spain
- Institute of Advanced Chemistry of Catalonia, Consejo Superior de Investigaciones Científicas (IQAC-CSIC), 08034 Barcelona, Spain
| | - Amadeu Llebaria
- Institute of Advanced Chemistry of Catalonia, Consejo Superior de Investigaciones Científicas (IQAC-CSIC), 08034 Barcelona, Spain
| | - Eduardo Soriano
- Department of Cell Biology, Physiology, and Immunology, University of Barcelona (UB), 08028 Barcelona, Spain
- Catalan Institution for Research and Advanced Studies (ICREA), 08010 Barcelona, Spain
- Network Center of Biomedical Research in Neurodegenerative Diseases (CIBERNED), 28031 Madrid, Spain
| | - Julien Colombelli
- Institute for Research in Biomedicine (IRB Barcelona), Barcelona Institute of Science and Technology, 08028 Barcelona, Spain
| | - Kira E Poskanzer
- Department of Biochemistry & Biophysics, University of California, San Francisco (UCSF), CA 94158
- Kavli Institute for Fundamental Neuroscience, University of California, San Francisco, CA 94158
| | - Gertrudis Perea
- Cajal Institute, Consejo Superior de Investigaciones Científicas (IC-CSIC), 28002 Madrid, Spain
| | - Pau Gorostiza
- Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology, 08028 Barcelona, Spain;
- Catalan Institution for Research and Advanced Studies (ICREA), 08010 Barcelona, Spain
- Network Center of Biomedical Research in Bioengineering, Biomaterials, and Nanomedicine (CIBER-BBN), 50015 Zaragoza, Spain
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12
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Yamada A, Abe M, Nishimura Y, Ishizaka S, Namba M, Nakashima T, Shimoji K, Hattori N. Photochemical generation of the 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) radical from caged nitroxides by near-infrared two-photon irradiation and its cytocidal effect on lung cancer cells. Beilstein J Org Chem 2019; 15:863-873. [PMID: 31019579 PMCID: PMC6466695 DOI: 10.3762/bjoc.15.84] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 03/16/2019] [Indexed: 12/14/2022] Open
Abstract
Novel caged nitroxides (nitroxide donors) with near-infrared two-photon (TP) responsive character, 2,2,6,6-tetramethyl-1-(1-(2-(4-nitrophenyl)benzofuran-6-yl)ethoxy)piperidine (2a) and its regioisomer 2b, were designed and synthesized. The one-photon (OP) (365 ± 10 nm) and TP (710–760 nm) triggered release (i.e., uncaging) of the 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) radical under air atmosphere were discovered. The quantum yields for the release of the TEMPO radical were 2.5% (2a) and 0.8% (2b) in benzene at ≈1% conversion of 2, and 13.1% (2a) and 12.8% (2b) in DMSO at ≈1% conversion of 2. The TP uncaging efficiencies were determined to be 1.1 GM at 740 nm for 2a and 0.22 GM at 730 nm for 2b in benzene. The cytocidal effect of compound 2a on lung cancer cells under photolysis conditions was also assessed to test the efficacy as anticancer agents. In a medium containing 100 μg mL−1 of 2a exposed to light, the number of living cells decreased significantly compared to the unexposed counterparts (65.8% vs 85.5%).
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Affiliation(s)
- Ayato Yamada
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Manabu Abe
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan.,Hiroshima Research Centre for Photo-Drug-Delivery Systems (HiU-P-DDS), Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan.,JST-CREST, K's Gobancho 6F, 7, Gobancho, Chiyoda-ku, Tokyo 102-0075, Japan
| | - Yoshinobu Nishimura
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan
| | - Shoji Ishizaka
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan.,Hiroshima Research Centre for Photo-Drug-Delivery Systems (HiU-P-DDS), Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Masashi Namba
- Hiroshima Research Centre for Photo-Drug-Delivery Systems (HiU-P-DDS), Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan.,Department of Molecular and Internal Medicine, Graduate School of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, Hiroshima 734-8551, Japan
| | - Taku Nakashima
- Hiroshima Research Centre for Photo-Drug-Delivery Systems (HiU-P-DDS), Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan.,Department of Molecular and Internal Medicine, Graduate School of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, Hiroshima 734-8551, Japan
| | - Kiyofumi Shimoji
- Department of Molecular and Internal Medicine, Graduate School of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, Hiroshima 734-8551, Japan
| | - Noboru Hattori
- Hiroshima Research Centre for Photo-Drug-Delivery Systems (HiU-P-DDS), Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan.,Department of Molecular and Internal Medicine, Graduate School of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, Hiroshima 734-8551, Japan
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13
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Guruge C, Rfaish SY, Byrd C, Yang S, Starrett AK, Guisbert E, Nesnas N. Caged Proline in Photoinitiated Organocatalysis. J Org Chem 2019; 84:5236-5244. [PMID: 30908906 DOI: 10.1021/acs.joc.9b00220] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Organocatalysis is an emerging field, in which small metal-free organic structures catalyze a diversity of reactions with a remarkable stereoselectivity. The ability to selectively switch on such pathways upon demand has proven to be a valuable tool in biological systems. Light as a trigger provides the ultimate spatial and temporal control of activation. However, there have been limited examples of phototriggered catalytic systems. Herein, we describe the synthesis and application of a caged proline system that can initiate organocatalysis upon irradiation. The caged proline was generated using the highly efficient 4-carboxy-5,7-dinitroindolinyl (CDNI) photocleavable protecting group in a four-step synthesis. Advantages of this system include water solubility, biocompatibility, high quantum yield for catalyst release, and responsiveness to two-photon excitation. We showed the light-triggered catalysis of a crossed aldol reaction, a Mannich reaction, and a self-aldol condensation reaction. We also demonstrated light-initiated catalysis, leading to the formation of a biocide in situ, which resulted in the growth inhibition of E. coli, with as little as 3 min of irradiation. This technique can be broadly applied to other systems, by which the formation of active forms of drugs can be catalytically assembled remotely via two-photon irradiation.
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Affiliation(s)
- Charitha Guruge
- Department of Biomedical and Chemical Engineering and Sciences , Florida Institute of Technology , Melbourne , Florida 32901 , United States
| | - Saad Y Rfaish
- Department of Biomedical and Chemical Engineering and Sciences , Florida Institute of Technology , Melbourne , Florida 32901 , United States
| | - Chanel Byrd
- Department of Biomedical and Chemical Engineering and Sciences , Florida Institute of Technology , Melbourne , Florida 32901 , United States
| | - Shukun Yang
- Department of Biomedical and Chemical Engineering and Sciences , Florida Institute of Technology , Melbourne , Florida 32901 , United States
| | - Anthony K Starrett
- Department of Biomedical and Chemical Engineering and Sciences , Florida Institute of Technology , Melbourne , Florida 32901 , United States
| | - Eric Guisbert
- Department of Biomedical and Chemical Engineering and Sciences , Florida Institute of Technology , Melbourne , Florida 32901 , United States
| | - Nasri Nesnas
- Department of Biomedical and Chemical Engineering and Sciences , Florida Institute of Technology , Melbourne , Florida 32901 , United States
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14
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Cobalt oxyhydroxide modified with poly-β-cyclodextrin and a cyanine dye as a nanoplatform for two-photon imaging of ascorbic acid in living cells and tissue. Mikrochim Acta 2019; 186:201. [PMID: 30796531 DOI: 10.1007/s00604-019-3320-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 02/13/2019] [Indexed: 01/26/2023]
Abstract
This article describes the development of several nanoconjugates composed of cobalt (III) oxyhydroxide and DEASPI/βCDP, where DEASPI stands for the dye trans-4-[p-(N,N-diethylamino)styryl]-N-methylpyridinium, and βCDP stands for β-cyclodextrin. The material enables sensitive fluorometric detection and 3D imaging of ascorbic acid (AA) in biological samples. A nanomicelle composed of DEASPI and βCDP was prepared to act as a two-photon absorbance (TPA) nanofluorophore with desirable two-photon-sensitized fluorescence, high penetration depth, and excellent cell-permeability). The CoOOH nanoflakes were placed on the surface of the nanomicelle to act as both a quencher of fluorescence and as the recognition unit for AA. In the presence of AA, the CoOOH nanoflakes are reduced to Co (II), and this triggers the recovery of fluorescence. This new nanoprobe exhibits amplified two-photon fluorescence (excitation at 840 nm; emission at 565 nm), high sensitivity, and good selectivity. In-vitro imaging of endogenous AA was demonstrated in living HeLa cells. It was also employed to 3D imaging of exogenous AA in tissue by two-photon excitation microscopy to a depth of up to 320 μm. In our perception, this nanoprobe represents a valuable tool for elucidating the roles of AA in biochemical and clinical studies. Graphical abstract Schematic presentation of the preparation of a novel Poly β-Cyclodextrin/TPdye conjugated with cobalt oxyhydroxide nanoplatform and its application for high sensitive and two-photon 3D imaging of ascorbic acid (AA) in living cells and deep tissues.
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15
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Ellis-Davies GCR. Two-Photon Uncaging of Glutamate. Front Synaptic Neurosci 2019; 10:48. [PMID: 30687075 PMCID: PMC6333857 DOI: 10.3389/fnsyn.2018.00048] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 12/11/2018] [Indexed: 01/26/2023] Open
Abstract
Two-photon microscopy produces the excited singlet state of a chromophore with wavelengths approximately double that used for normal excitation. Two photons are absorbed almost simultaneously, via a virtual state, and this makes the excitation technique inherently non-linear. It requires ultra-fast lasers to deliver the high flux density needed to access intrinsically very short lived intermediates, and in combination with lenses of high numerical aperture, this confines axial excitation highly. Since the two-photon excitation volume is similar to a large spine head, the technique has been widely used to study glutamatergic transmission in brain slices. Here I describe the principles of two-photon uncaging of glutamate and provide a practical guide to its application.
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16
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Sõrmus T, Lavogina D, Enkvist E, Uri A, Viht K. Efficient photocaging of a tight-binding bisubstrate inhibitor of cAMP-dependent protein kinase. Chem Commun (Camb) 2019; 55:11147-11150. [DOI: 10.1039/c9cc04978a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PKA bisubstrate inhibitor photocaging resulted in an over 5 orders of magnitude affinity difference between the photocaged and the active inhibitor.
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Affiliation(s)
- Tanel Sõrmus
- Institute of Chemistry
- University of Tartu
- 50411 Tartu
- Estonia
| | - Darja Lavogina
- Institute of Chemistry
- University of Tartu
- 50411 Tartu
- Estonia
| | - Erki Enkvist
- Institute of Chemistry
- University of Tartu
- 50411 Tartu
- Estonia
| | - Asko Uri
- Institute of Chemistry
- University of Tartu
- 50411 Tartu
- Estonia
| | - Kaido Viht
- Institute of Chemistry
- University of Tartu
- 50411 Tartu
- Estonia
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17
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Guruge C, Ouedraogo YP, Comitz RL, Ma J, Losonczy A, Nesnas N. Improved Synthesis of Caged Glutamate and Caging Each Functional Group. ACS Chem Neurosci 2018; 9:2713-2721. [PMID: 29750497 DOI: 10.1021/acschemneuro.8b00152] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Glutamate is an excitatory neurotransmitter that controls numerous pathways in the brain. Neuroscientists make use of photoremovable protecting groups, also known as cages, to release glutamate with precise spatial and temporal control. Various cage designs have been developed and among the most effective has been the nitroindolinyl caging of glutamate. We, hereby, report an improved synthesis of one of the current leading molecules of caged glutamate, 4-carboxymethoxy-5,7-dinitroindolinyl glutamate (CDNI-Glu), which possesses efficiencies with the highest reported quantum yield of at least 0.5. We present the shortest route, to date, for the synthesis of CDNI-Glu in 4 steps, with a total reaction time of 40 h and an overall yield of 20%. We also caged glutamate at the other two functional groups, thereby, introducing two new cage designs: α-CDNI-Glu and N-CDNI-Glu. We included a study of their photocleavage properties using UV-vis, NMR, as well as a physiology experiment of a two-photon uncaging of CDNI-Glu in acute hippocampal brain slices. The newly introduced cage designs may have the potential to minimize the interference that CDNI-Glu has with the GABAA receptor. We are broadly disseminating this to enable neuroscientists to use these photoactivatable tools.
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Affiliation(s)
- Charitha Guruge
- Department of Chemistry, Florida Institute of Technology, Melbourne, Florida 32901, United States
| | - Yannick P. Ouedraogo
- Department of Chemistry, Florida Institute of Technology, Melbourne, Florida 32901, United States
| | - Richard L. Comitz
- Department of Chemistry, Florida Institute of Technology, Melbourne, Florida 32901, United States
| | - Jingxuan Ma
- Department of Chemistry, Florida Institute of Technology, Melbourne, Florida 32901, United States
| | - Attila Losonczy
- Department of Neuroscience, Columbia University, New York, New York 10032, United States
| | - Nasri Nesnas
- Department of Chemistry, Florida Institute of Technology, Melbourne, Florida 32901, United States
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18
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Goegan B, Terzi F, Bolze F, Cambridge S, Specht A. Synthesis and Characterization of Photoactivatable Doxycycline Analogues Bearing Two-Photon-Sensitive Photoremovable Groups Suitable for Light-Induced Gene Expression. Chembiochem 2018; 19:1341-1348. [DOI: 10.1002/cbic.201700628] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Indexed: 12/14/2022]
Affiliation(s)
- Bastien Goegan
- Laboratoire de Conception et Application de Molécules Bioactives; UMR 7199; CNRS; Faculté de Pharmacie; Université de Strasbourg; 74 Route du Rhin 67400 Illkirch France
| | - Firat Terzi
- University of Heidelberg; Department of Functional Neuroanatomy; Im Neuenheimer Feld 307 69120 Heidelberg Germany
| | - Frédéric Bolze
- Laboratoire de Conception et Application de Molécules Bioactives; UMR 7199; CNRS; Faculté de Pharmacie; Université de Strasbourg; 74 Route du Rhin 67400 Illkirch France
| | - Sidney Cambridge
- University of Heidelberg; Department of Functional Neuroanatomy; Im Neuenheimer Feld 307 69120 Heidelberg Germany
| | - Alexandre Specht
- Laboratoire de Conception et Application de Molécules Bioactives; UMR 7199; CNRS; Faculté de Pharmacie; Université de Strasbourg; 74 Route du Rhin 67400 Illkirch France
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19
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Agarwal HK, Zhai S, Surmeier DJ, Ellis-Davies GCR. Intracellular Uncaging of cGMP with Blue Light. ACS Chem Neurosci 2017; 8:2139-2144. [PMID: 28762726 DOI: 10.1021/acschemneuro.7b00237] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
We have made a new caged cGMP that is photolyzed with blue light. Using our recently developed derivative of 7-diethylaminocourmarin (DEAC) called DEAC450, we synthesized coumarin phosphoester derivatives of cGMP with two negative charges appended to the DEAC450 moiety. DEAC450-cGMP is freely soluble in physiological buffer without the need for any organic cosolvents. With a photolysis quantum yield of 0.18 and an extinction coefficient of 43 000 M-1 cm-1 at 453 nm, DEAC450-cGMP is the most photosensitive caged cGMP made to date. In patch-clamped neurons in acutely isolated brain slices, blue light effectively uncaged cGMP from DEAC450 and facilitated activation of hyperpolarization and cyclic nucleotide gated cation (HCN) channels in cholinergic interneurons. Thus, DEAC450-cGMP has a unique set of optical and chemical properties that make it a useful addition to the optical arsenal available to neurobiologists.
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Affiliation(s)
- Hitesh K. Agarwal
- Department
of Neuroscience, Mount Sinai School of Medicine, New York, New York 10029, United States
| | - Shenyu Zhai
- Department
of Physiology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, United States
| | - D. James Surmeier
- Department
of Physiology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, United States
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20
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Geng S, Wang Y, Wang L, Kouyama T, Gotoh T, Wada S, Wang JY. A Light-Responsive Self-Assembly Formed by a Cationic Azobenzene Derivative and SDS as a Drug Delivery System. Sci Rep 2017; 7:39202. [PMID: 28051069 PMCID: PMC5209711 DOI: 10.1038/srep39202] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 11/21/2016] [Indexed: 11/23/2022] Open
Abstract
The structure of a self-assembly formed from a cationic azobenzene derivative, 4-cholesterocarbonyl-4'-(N,N,N-triethylamine butyloxyl bromide) azobenzene (CAB) and surfactant sodium dodecyl sulfate (SDS) in aqueous solution was studied by cryo-TEM and synchrotron radiation small-angle X-ray scattering (SAXS). Both unilamellar and multilamellar vesicles could be observed. CAB in vesicles were capable to undergo reversible trans-to-cis isomerization upon UV or visible light irradiation. The structural change upon UV light irradiation could be catched by SAXS, which demonstrated that the interlamellar spacing of the cis-multilamellar vesicles increased by 0.2-0.3 nm. Based on this microstructural change, the release of rhodamine B (RhB) and doxorubicin (DOX) could be triggered by UV irradiation. When incubated NIH 3T3 cells and Bel 7402 cells with DOX-loaded CAB/SDS vesicles, UV irradiation induced DOX release decreased the viability of both cell lines significantly compared with the non-irradiated cells. The in vitro experiment indicated that CAB/SDS vesicles had high efficiency to deliver loaded molecules into cells. The in vivo experiment showed that CAB/SDS vesicles not only have high drug delivery efficiency into rat retinas, but also could maintain high drug concentration for a longer time. CAB/SDS catanionic vesicles may find potential applications as a smart drug delivery system for controlled release by light.
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Affiliation(s)
- Shengyong Geng
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
- Photonics Control Technology Team, Advanced Photonics Technology Development Group, Center for Advanced Photonics, RIKEN, Wako, Saitama 351-0198, Japan
| | - Yuzhu Wang
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
| | - Liping Wang
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Tsutomu Kouyama
- Department of Physics, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
| | - Toshiaki Gotoh
- Department of Physics, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
| | - Satoshi Wada
- Photonics Control Technology Team, Advanced Photonics Technology Development Group, Center for Advanced Photonics, RIKEN, Wako, Saitama 351-0198, Japan
| | - Jin-Ye Wang
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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21
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Richers MT, Amatrudo JM, Olson JP, Ellis-Davies GCR. Cloaked Caged Compounds: Chemical Probes for Two-Photon Optoneurobiology. Angew Chem Int Ed Engl 2017; 56:193-197. [PMID: 27910251 PMCID: PMC5195861 DOI: 10.1002/anie.201609269] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Indexed: 11/06/2022]
Abstract
Caged neurotransmitters, in combination with focused light beams, enable precise interrogation of neuronal function, even at the level of single synapses. However, most caged transmitters are, surprisingly, severe antagonists of ionotropic gamma-aminobutyric acid (GABA) receptors. By conjugation of a large, neutral dendrimer to a caged GABA probe we introduce a "cloaking" technology that effectively reduces such antagonism to very low levels. Such cloaked caged compounds will enable the study of the signaling of the inhibitory neurotransmitter GABA in its natural state using two-photon uncaging microscopy for the first time.
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Affiliation(s)
- Matthew T Richers
- Department of Neuroscience, Mount Sinai School of Medicine, One Gustave Levy Place, New York, NY, USA
| | - Joseph M Amatrudo
- Department of Neuroscience, Mount Sinai School of Medicine, One Gustave Levy Place, New York, NY, USA
| | - Jeremy P Olson
- Department of Neuroscience, Mount Sinai School of Medicine, One Gustave Levy Place, New York, NY, USA
| | - Graham C R Ellis-Davies
- Department of Neuroscience, Mount Sinai School of Medicine, One Gustave Levy Place, New York, NY, USA
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22
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Pan D, Luo F, Liu X, Liu W, Chen W, Liu F, Kuang YQ, Jiang JH. A novel two-photon fluorescent probe with a long Stokes shift and a high signal-to-background ratio for human NAD(P)H:quinone oxidoreductase 1 (hNQO1) detection and imaging in living cells and tissues. Analyst 2017; 142:2624-2630. [DOI: 10.1039/c7an00575j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
We have developed a novel TPE fluorescent probe (Q3CA-P), with a long Stokes shift and a high signal-to-background ratio, for hNQO1 detection and imaging.
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Affiliation(s)
- Dan Pan
- State Key Laboratory of Chemo/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
| | - Fengyan Luo
- State Key Laboratory of Chemo/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
| | - Xianjun Liu
- State Key Laboratory of Chemo/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
| | - Wei Liu
- State Key Laboratory of Chemo/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
| | - Wen Chen
- State Key Laboratory of Chemo/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
| | - Feng Liu
- State Key Laboratory of Chemo/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
| | - Yong-Qing Kuang
- State Key Laboratory of Chemo/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
| | - Jian-Hui Jiang
- State Key Laboratory of Chemo/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
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23
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Yao S, Kim B, Yue X, Colon Gomez MY, Bondar MV, Belfield KD. Synthesis of Near-Infrared Fluorescent Two-Photon-Absorbing Fluorenyl Benzothiadiazole and Benzoselenadiazole Derivatives. ACS OMEGA 2016; 1:1149-1156. [PMID: 31457186 PMCID: PMC6640770 DOI: 10.1021/acsomega.6b00289] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 11/17/2016] [Indexed: 05/09/2023]
Abstract
A series of dyes 2-5 based on 5-thienyl-2,1,3-benzothiadiazole and 5-thienyl-2,1,3-benzoselenadiazole cores were synthesized as near-infrared-emitting two-photon-absorbing fluorophores. Fluorescence maxima wavelengths as long as 714 nm and quantum yields as high as 0.67 were realized. The fluorescence quantum yields of dyes 2-4 were nearly constant, regardless of solvent polarity. These diazoles exhibited large Stokes shifts (>110 nm) and high two-photon figure of merit. Cells incubated on a 3D scaffold with probe 4 (encapsulated in Pluronic micelles) exhibited bright fluorescence, enabling 3D two-photon fluorescence imaging to a depth of 100 μm.
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Affiliation(s)
- Sheng Yao
- Department
of Chemistry, University of Central Florida, P.O. Box 162366, Orlando, Florida 32816-2366, United States
| | - Bosung Kim
- Department
of Chemistry, University of Central Florida, P.O. Box 162366, Orlando, Florida 32816-2366, United States
| | - Xiling Yue
- Department
of Chemistry, University of Central Florida, P.O. Box 162366, Orlando, Florida 32816-2366, United States
| | - Maria Y. Colon Gomez
- Department
of Chemistry, University of Central Florida, P.O. Box 162366, Orlando, Florida 32816-2366, United States
| | | | - Kevin D. Belfield
- Department
of Chemistry and Environmental Science, College of Science and Liberal
Arts, New Jersey Institute of Technology, 323 MLK Blvd.,
University Heights, Newark, New Jersey 07102, United States
- School
of Chemistry and Chemical Engineering, Shaanxi
Normal University, Xi’an 710062, P. R. China
- E-mail: (K.D.B.)
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24
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Richers MT, Amatrudo JM, Olson JP, Ellis‐Davies GCR. Cloaked Caged Compounds: Chemical Probes for Two‐Photon Optoneurobiology. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201609269] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Matthew T. Richers
- Department of Neuroscience Mount Sinai School of Medicine One Gustave Levy Place New York NY USA
| | - Joseph M. Amatrudo
- Department of Neuroscience Mount Sinai School of Medicine One Gustave Levy Place New York NY USA
| | - Jeremy P. Olson
- Department of Neuroscience Mount Sinai School of Medicine One Gustave Levy Place New York NY USA
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25
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Jakkampudi S, Abe M, Komori N, Takagi R, Furukawa K, Katan C, Sawada W, Takahashi N, Kasai H. Design and Synthesis of a 4-Nitrobromobenzene Derivative Bearing an Ethylene Glycol Tetraacetic Acid Unit for a New Generation of Caged Calcium Compounds with Two-Photon Absorption Properties in the Near-IR Region and Their Application in Vivo. ACS OMEGA 2016; 1:193-201. [PMID: 31457124 PMCID: PMC6640811 DOI: 10.1021/acsomega.6b00119] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Accepted: 07/25/2016] [Indexed: 06/10/2023]
Abstract
Among biologically active compounds, calcium ions (Ca2+) are one of the most important species in cell physiological functions. Development of new calcium chelators with two-photon absorption (TPA) properties is a state-of-the-art challenge for chemists. In this study, we report the first and efficient synthesis of 5-bromo-2-nitrobenzyl-substituted ethylene glycol tetraacetic acid (EGTA) as a platform for a new generation of calcium chelators with TPA properties in the near-infrared region. New calcium chelators with high TPA properties, that is, a two-photon (TP) fragmentation efficiency of δu = 20.7 GM at 740 nm for 2-(4-nitrophenyl)benzofuran (NPBF)-substituted EGTA (NPBF-EGTA, K d = 272 nM) and δu = 7.8 GM at 800 nm for 4-amino-4'-nitro-1,1'-biphenyl (BP)-substituted EGTA (BP-EGTA, K d = 440 nM) derivatives, were synthesized using Suzuki-Miyaura coupling reactions of the bromide with benzofuran-2-boronic acid and 4-(dimethylamino)phenyl boronic acid, respectively. The corresponding acetoxymethyl (AM) esters were prepared and successfully applied to the Ca2+-uncaging reaction triggered by TP photolysis in vivo.
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Affiliation(s)
- Satish Jakkampudi
- Department
of Chemistry & Research Center for Future Science, Graduate School
of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
- JST-CREST, K’s Gobancho 7, Gobancho, Chiyodaku, Tokyo 102-0075, Japan
| | - Manabu Abe
- Department
of Chemistry & Research Center for Future Science, Graduate School
of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
- JST-CREST, K’s Gobancho 7, Gobancho, Chiyodaku, Tokyo 102-0075, Japan
| | - Naomitsu Komori
- Department
of Chemistry & Research Center for Future Science, Graduate School
of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Ryukichi Takagi
- Department
of Chemistry & Research Center for Future Science, Graduate School
of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Ko Furukawa
- Center
for Instrumental Analysis, Institute for Research Promotion, Niigata University, 8050 Ikarashi 2-no-cho, Nishi-ku, Niigata 950-2181, Japan
| | - Claudine Katan
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université
Rennes 1, 35042 Rennes, France
| | - Wakako Sawada
- Laboratory
of Structural Physiology, CDBIM, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Noriko Takahashi
- Laboratory
of Structural Physiology, CDBIM, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Haruo Kasai
- JST-CREST, K’s Gobancho 7, Gobancho, Chiyodaku, Tokyo 102-0075, Japan
- Laboratory
of Structural Physiology, CDBIM, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
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26
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Kantevari S, Passlick S, Kwon HB, Richers MT, Sabatini BL, Ellis-Davies GC. Development of Anionically Decorated Caged Neurotransmitters: In Vitro Comparison of 7-Nitroindolinyl- and 2-(p-Phenyl-o-nitrophenyl)propyl-Based Photochemical Probes. Chembiochem 2016; 17:953-61. [PMID: 26929152 PMCID: PMC4870097 DOI: 10.1002/cbic.201600019] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Indexed: 01/26/2023]
Abstract
Neurotransmitter uncaging, especially that of glutamate, has been used to study synaptic function for over 30 years. One limitation of caged glutamate probes is the blockade of γ-aminobutyric acid (GABA)-A receptor function. This problem comes to the fore when the probes are applied at the high concentrations required for effective two-photon photolysis. To mitigate such problems one could improve the photochemical properties of caging chromophores and/or remove receptor blockade. We show that addition of a dicarboxylate unit to the widely used 4-methoxy-7-nitroindolinyl-Glu (MNI-Glu) system reduced the off-target effects by about 50-70 %. When the same strategy was applied to an electron-rich 2-(p-Phenyl-o-nitrophenyl)propyl (PNPP) caging group, the pharmacological improvements were not as significant as in the MNI case. Finally, we used very extensive biological testing of the PNPP-caged Glu (more than 250 uncaging currents at single dendritic spines) to show that nitro-biphenyl caging chromophores have two-photon uncaging efficacies similar to that of MNI-Glu.
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Affiliation(s)
- Srinivas Kantevari
- Department of Neuroscience, Mount Sinai School of Medicine, New York, NY 10029, USA
| | - Stefan Passlick
- Department of Neuroscience, Mount Sinai School of Medicine, New York, NY 10029, USA
| | - Hyung-Bae Kwon
- Department of Neurobiology, Howard Hughes Medical Institute, Harvard Medical School, Cambridge, MA 02115, USA
| | - Matthew T. Richers
- Department of Neuroscience, Mount Sinai School of Medicine, New York, NY 10029, USA
| | - Bernardo L. Sabatini
- Department of Neurobiology, Howard Hughes Medical Institute, Harvard Medical School, Cambridge, MA 02115, USA
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27
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Ciuciu AI, Korzycka KA, Lewis WJM, Bennett PM, Anderson HL, Flamigni L. Model dyads for 2PA uncaging of a protecting group via photoinduced electron transfer. Phys Chem Chem Phys 2016; 17:6554-64. [PMID: 25660491 DOI: 10.1039/c4cp05812g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Three dyads with a fluorene derivative as an electron-donor and with electron-acceptors of variable redox potentials were synthesized as models for two-photon activated uncaging via electron transfer. A spectroscopic and photophysical study of the component units and the dyads in solvents of different polarities demonstrated an efficient electron transfer (efficiencies > 80%) followed by charge recombination in the arrays (30 ps < τ < 1.6 ns). Recombination takes place to the ground state in all cases except for the dyad displaying the highest driving force for charge recombination in the apolar solvent. The effects of changing the solvent polarity, as well as the driving force, for electron-transfer are discussed in the frame of the current theories of electron transfer.
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Affiliation(s)
- Adina I Ciuciu
- Istituto per la Sintesi Organica e Fotoreattivita' (ISOF), CNR, Via P. Gobetti 101, 40129 Bologna, Italy.
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28
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Komori N, Jakkampudi S, Motoishi R, Abe M, Kamada K, Furukawa K, Katan C, Sawada W, Takahashi N, Kasai H, Xue B, Kobayashi T. Design and synthesis of a new chromophore, 2-(4-nitrophenyl)benzofuran, for two-photon uncaging using near-IR light. Chem Commun (Camb) 2016; 52:331-4. [DOI: 10.1039/c5cc07664a] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A new chromophore, 2-(4-nitrophenyl)benzofuran (NPBF), was designed for two-photon (TP) uncaging using near-IR light.
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29
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Hayashi KI, Kusaka N, Yamasaki S, Zhao Y, Nozaki H. Development of 4-methoxy-7-nitroindolinyl (MNI)-caged auxins which are extremely stable in planta. Bioorg Med Chem Lett 2015; 25:4464-71. [PMID: 26364943 PMCID: PMC4683155 DOI: 10.1016/j.bmcl.2015.09.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 07/09/2015] [Accepted: 09/01/2015] [Indexed: 10/23/2022]
Abstract
Phytohormone auxin is a master regulator in plant growth and development. Regulation of cellular auxin level plays a central role in plant development. Auxin polar transport system modulates an auxin gradient that determines plant developmental process in response to environmental conditions and developmental programs. Photolabile caged auxins allow optical control of artificial auxin gradients at cellular resolution. Especially, two-photon uncaging system achieves high spatiotemporal control of photolysis reaction at two-photon cross-section. However, the development of caged versions of auxin has been limited by the instability of the caged auxins to higher plant metabolic activities. Here, we describe the synthesis and application of highly stable caged auxins, 4-methoxy-7-nitroindolinyl (MNI)-caged auxins. Natural auxin, indole 3-acetic acid, and two synthetic auxins, 1-NAA and 2,4-D were caged by MNI caging group. MNI-caged auxins showed a high stability in planta and a rapid release the original auxin when photolyzed. We demonstrated that optical control of auxin-responsive gene expression and auxin-related physiological responses by using MNI-caged auxins. We anticipate that MNI-caged auxins will be an effective tool for high-resolution control of endogenous auxin level.
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Affiliation(s)
- Ken-Ichiro Hayashi
- Department of Biochemistry, Okayama University of Science, 1-1 Ridai-cho, Okayama 700-0005, Japan.
| | - Naoyuki Kusaka
- Department of Biochemistry, Okayama University of Science, 1-1 Ridai-cho, Okayama 700-0005, Japan
| | - Soma Yamasaki
- Department of Biochemistry, Okayama University of Science, 1-1 Ridai-cho, Okayama 700-0005, Japan
| | - Yunde Zhao
- Section of Cell and Developmental Biology, University of California at San Diego, La Jolla, CA 92093-0116, United States
| | - Hiroshi Nozaki
- Department of Biochemistry, Okayama University of Science, 1-1 Ridai-cho, Okayama 700-0005, Japan
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30
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Olejniczak J, Carling CJ, Almutairi A. Photocontrolled release using one-photon absorption of visible or NIR light. J Control Release 2015; 219:18-30. [PMID: 26394063 DOI: 10.1016/j.jconrel.2015.09.030] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 09/08/2015] [Accepted: 09/16/2015] [Indexed: 11/26/2022]
Abstract
Light is an excellent means to externally control the properties of materials and small molecules for many applications. Light's ability to initiate chemistries largely independent of a material's local environment makes it particularly useful as a bio-orthogonal and on-demand trigger in living systems. Materials responsive to UV light are widely reported in the literature; however, UV light has substantial limitations for in vitro and in vivo applications. Many biological molecules absorb these energetic wavelengths directly, not only preventing substantial tissue penetration but also causing detrimental photochemical reactions. The more innocuous nature of long-wavelength light (>400nm) and its ability at longer wavelengths (600-950nm) to effectively penetrate tissues is ideal for biological applications. Multi-photon processes (e.g. two-photon excitation and upconversion) using longer wavelength light, often in the near-infrared (NIR) range, have been proposed as a means of avoiding the negative characteristics of UV light. However, high-power focused laser light and long irradiation times are often required to initiate photorelease using these inefficient non-linear optical methods, limiting their in vivo use in mammalian tissues where NIR light is readily scattered. The development of materials that efficiently convert a single photon of long-wavelength light to chemical change is a viable solution to achieve in vivo photorelease. However, to date only a few such materials have been reported. Here we review current technologies for photo-regulated release using photoactive organic materials that directly absorb visible and NIR light.
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Affiliation(s)
- Jason Olejniczak
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093, USA
| | - Carl-Johan Carling
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093, USA; IEM Center for Nanomedicine and Engineering, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093, USA
| | - Adah Almutairi
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093, USA; IEM Center for Nanomedicine and Engineering, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093, USA; Department of Nanoengineering, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093, USA; Department of Materials Science and Engineering, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093, USA.
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31
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Molaeirad A, Asl AL, khayati M, Alijanianzadeh M. Assay of bacteriorhodopsin stability on polycarbonate surface by using of FTIR-ATR: a model of disk-based bioassays. J Bioenerg Biomembr 2015; 47:355-60. [DOI: 10.1007/s10863-015-9616-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Accepted: 06/15/2015] [Indexed: 11/25/2022]
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32
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Two-photon brightness of azobenzene photoswitches designed for glutamate receptor optogenetics. Proc Natl Acad Sci U S A 2015; 112:E776-85. [PMID: 25653339 DOI: 10.1073/pnas.1416942112] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Mammalian neurotransmitter-gated receptors can be conjugated to photoswitchable tethered ligands (PTLs) to enable photoactivation, or photoantagonism, while preserving normal function at neuronal synapses. "MAG" PTLs for ionotropic and metabotropic glutamate receptors (GluRs) are based on an azobenzene photoswitch that is optimally switched into the liganding state by blue or near-UV light, wavelengths that penetrate poorly into the brain. To facilitate deep-tissue photoactivation with near-infrared light, we measured the efficacy of two-photon (2P) excitation for two MAG molecules using nonlinear spectroscopy. Based on quantitative characterization, we find a recently designed second generation PTL, L-MAG0460, to have a favorable 2P absorbance peak at 850 nm, enabling efficient 2P activation of the GluK2 kainate receptor, LiGluR. We also achieve 2P photoactivation of a metabotropic receptor, LimGluR3, with a new mGluR-specific PTL, D-MAG0460. 2P photoswitching is efficiently achieved using digital holography to shape illumination over single somata of cultured neurons. Simultaneous Ca(2+)-imaging reports on 2P photoswitching in multiple cells with high temporal resolution. The combination of electrophysiology or Ca(2+) imaging with 2P activation by optical wavefront shaping should make second generation PTL-controlled receptors suitable for studies of intact neural circuits.
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33
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Schwabe T, Beerepoot MTP, Olsen JMH, Kongsted J. Analysis of computational models for an accurate study of electronic excitations in GFP. Phys Chem Chem Phys 2015; 17:2582-8. [DOI: 10.1039/c4cp04524f] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The accuracy of PERI-CC2 is successfully assessed against RVS-CC2 for GFP model clusters and subsequently applied to a whole protein model.
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Affiliation(s)
- Tobias Schwabe
- Center for Bioinformatics and Physical Chemistry Institute
- D-22148 Hamburg
- Germany
| | - Maarten T. P. Beerepoot
- Centre for Theoretical and Computational Chemistry
- Department of Chemistry
- University of Tromsø – The Arctic University of Norway
- N-9037 Tromsø
- Norway
| | - Jógvan Magnus Haugaard Olsen
- Laboratory of Computational Chemistry and Biochemistry
- Ecole Polytechnique Fédérale de Lausanne
- CH-1015 Lausanne
- Switzerland
- Department of Physics
| | - Jacob Kongsted
- Department of Physics
- Chemistry and Pharmacy
- University of Southern Denmark
- DK-5230 Odense
- Denmark
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34
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Verwilst P, Sunwoo K, Kim JS. The role of copper ions in pathophysiology and fluorescent sensors for the detection thereof. Chem Commun (Camb) 2015; 51:5556-71. [DOI: 10.1039/c4cc10366a] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Copper ions are crucial to life, and some fundamental roles of copper in pathophysiology have been elucidated using fluorescent sensors.
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Affiliation(s)
- Peter Verwilst
- Department of Chemistry
- Korea Univesity
- Seoul 136-701
- Korea
| | - Kyoung Sunwoo
- Department of Chemistry
- Korea Univesity
- Seoul 136-701
- Korea
| | - Jong Seung Kim
- Department of Chemistry
- Korea Univesity
- Seoul 136-701
- Korea
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35
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Boinapally S, Huang B, Abe M, Katan C, Noguchi J, Watanabe S, Kasai H, Xue B, Kobayashi T. Caged glutamates with π-extended 1,2-dihydronaphthalene chromophore: design, synthesis, two-photon absorption property, and photochemical reactivity. J Org Chem 2014; 79:7822-30. [PMID: 25101898 DOI: 10.1021/jo501425p] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Caging and photochemical uncaging of the excitatory neurotransmitter l-glutamate (glu) offers a potentially valuable tool for understanding the mechanisms of neuronal processes. Designing water-soluble caged glutamates with the appropriate two-photon absorption property is an attractive strategy to achieve this. This paper describes the design, synthesis, and photochemical reactivity of caged glutamates with π-extended 1,2-dihydronaphthalene structures, which possess a two-photon cross-section of ∼120 GM and an excellent buffer solubility (up to 115 mM). High yields up to 99% glutamate were observed in the photolysis of two caged glutamates. Suzuki-Miyaura cross-coupling and Buchwald-Hartwig amination were used as the key reactions to synthesize the caged compounds.
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Affiliation(s)
- Srikanth Boinapally
- Department of Chemistry, Graduate School of Science, Hiroshima University (HIRODAI) , 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
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36
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Meath WJ, Jagatap BN. On the effects of permanent molecular dipoles in the simultaneous absorption of two photons: full generalized rotating wave approximation versus analytical results. J Chem Phys 2014; 139:144104. [PMID: 24116600 DOI: 10.1063/1.4824382] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The effects of permanent dipoles, and the relative effects of the direct permanent dipole and the virtual state excitation mechanisms, are discussed for excitations involving the simultaneous absorption of two identical photons. Two molecular models for two-photon excitation, one dominated by the direct permanent dipole mechanism and the other having significant contributions from both excitation mechanisms, are used for this purpose. Resonance profiles, as a function of laser intensity, are evaluated for both models by employing the full Generalized Rotating Wave Approximation method and the recently developed Analytic Generalized Rotating Wave Approximation (AGRWA). The profiles are used to assess (1) the nature of the effects of permanent molecular dipoles, (2) the relative contributions of the two excitation mechanisms, and (3) the validity of the AGRWA for two-photon excitations. The AGRWA is a very useful interpretive∕predictive tool even for higher laser intensities where its validity becomes questionable. It can be used to suggest how to exploit the effects of molecular permanent dipoles to enhance two photon excitations using both excitation mechanisms.
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Affiliation(s)
- William J Meath
- Department of Chemistry, University of Western Ontario, London, Ontario N6A 5B7, Canada
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37
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Gatterdam V, Ramadass R, Stoess T, Fichte MAH, Wachtveitl J, Heckel A, Tampé R. Three-Dimensional Protein Networks Assembled by Two-Photon Activation. Angew Chem Int Ed Engl 2014; 53:5680-4. [DOI: 10.1002/anie.201309930] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 01/23/2014] [Indexed: 12/16/2022]
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38
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Gatterdam V, Ramadass R, Stoess T, Fichte MAH, Wachtveitl J, Heckel A, Tampé R. Dreidimensionale Proteinnetzwerke durch Zwei-Photonen- Aktivierung. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201309930] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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39
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Kim D, Ryu HG, Ahn KH. Recent development of two-photon fluorescent probes for bioimaging. Org Biomol Chem 2014; 12:4550-66. [DOI: 10.1039/c4ob00431k] [Citation(s) in RCA: 160] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Fluorescent probes are essential tools for studying biological systems.
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Affiliation(s)
- Dokyoung Kim
- Department of Chemistry and Center for Electro-Photo Behaviors in Advanced Molecular Systems
- Gyungbuk, Korea 790-784
| | - Hye Gun Ryu
- Department of Chemistry and Center for Electro-Photo Behaviors in Advanced Molecular Systems
- Gyungbuk, Korea 790-784
| | - Kyo Han Ahn
- Department of Chemistry and Center for Electro-Photo Behaviors in Advanced Molecular Systems
- Gyungbuk, Korea 790-784
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40
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Crowe SE, Ellis-Davies GCR. In vivo characterization of a bigenic fluorescent mouse model of Alzheimer's disease with neurodegeneration. J Comp Neurol 2013; 521:2181-94. [PMID: 23348594 DOI: 10.1002/cne.23306] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Revised: 12/14/2012] [Accepted: 01/17/2013] [Indexed: 11/11/2022]
Abstract
The loss of cognitive function in Alzheimer's disease (AD) patients is strongly correlated with the loss of neurons in various regions of the brain. We have created a new fluorescent bigenic mouse model of AD by crossing "H-line" yellow fluorescent protein (YFP) mice with the 5xFAD mouse model, which we call the 5XY mouse model. The 5xFAD mouse has been shown to have significant loss of L5 pyramidal neurons by 12 months of age. These neurons are transgenically labeled with YFP in the 5XY mouse, which enable longitudinal imaging of structural changes. In the 5XY mice, we observed an appearance of axonal dystrophies, with two distinct morphologies in the early stages of the disease progression. Simple swelling dystrophies are transient in nature and are not directly associated with amyloid plaques. Rosette dystrophies are more complex structures that remained stable throughout all imaging sessions, and always surrounded an amyloid plaque. Plaque growth was followed over 4 weeks, and significant growth was seen between weekly imaging sessions. In addition to axonal dystrophy appearance and plaque growth, we were able to follow spine stability in 4-month old 5XY mice, which revealed no significant loss of spines. 5XY mice also showed a striking shrinkage of the neocortex at older ages (12-14 months). The 5XY mouse model may be a valuable tool for studying specific events in the degeneration of the neocortex, and may suggest new avenues for therapeutic intervention.
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Affiliation(s)
- Sarah E Crowe
- Department of Neuroscience, Mount Sinai School of Medicine, New York, New York 10029, USA
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41
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Synthesis and Characterization of Cell-Permeable Caged Phosphates that Can Be Photolyzed by Visible Light or 800 nm Two-Photon Photolysis. Chembiochem 2013; 14:2277-83. [DOI: 10.1002/cbic.201300425] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Indexed: 01/05/2023]
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42
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Buskila Y, Crowe SE, Ellis-Davies GCR. Synaptic deficits in layer 5 neurons precede overt structural decay in 5xFAD mice. Neuroscience 2013; 254:152-9. [PMID: 24055684 DOI: 10.1016/j.neuroscience.2013.09.016] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 08/20/2013] [Accepted: 09/06/2013] [Indexed: 12/15/2022]
Abstract
Synaptic decay and neurodegeneration are hallmarks of Alzheimer's disease that are thought to precede dementia. Recently, we have reported that the first signs of neuritic dystrophy in a new transgenic mouse model of familial Alzheimer's disease (FAD) called the "5xFAD" are axonal dystrophy followed by loss of spines on basal dendrites. The 5xFAD mouse has profound loss of layer 5 neurons by 12months, and these initial structural insults appear between 4 and 6months of age. Here, we test, for the first time, if synaptic failure of layer 5 neurons in the 5xFAD mouse precedes these structural changes. We used longitudinal, in vivo two-photon fluorescence imaging of bigenic 5xFAD/YFP mice to assess the overall structural stability of layer 5 neurons in young mice (age less than 14weeks). We found these neurons to be structurally and morphologically sound. In parallel, we used in vitro, whole-cell patch clamp electrophysiology of layer 5 pyramidal neurons, from mice aged 8-12weeks, to reveal significant pre- and postsynaptic defects in these cells. Thus our data suggest that layer 5 neurons in the 5xFAD mouse model have synaptic deficits at an early time point, before any overt structural dystrophy, and that such synaptic failure, with co-temporal biochemical changes, may be an early step in neuronal loss.
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Affiliation(s)
- Y Buskila
- Department of Neuroscience, Mount Sinai School of Medicine, New York, NY 10029, USA; Bioelectronics and Neuroscience Group, The MARCS Institute, University of Western Sydney, NSW 2560, Australia
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43
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Le Droumaguet C, Sourdon A, Genin E, Mongin O, Blanchard-Desce M. Two-photon polarity probes built from octupolar fluorophores: synthesis, structure-properties relationships, and use in cellular imaging. Chem Asian J 2013; 8:2984-3001. [PMID: 24019268 DOI: 10.1002/asia.201300735] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 07/03/2013] [Indexed: 12/28/2022]
Abstract
A series of octupolar fluorophores built from a triphenylamine (TPA) core connected to electron-withdrawing (EW) peripheral groups through conjugated spacers has been synthesized. Their photoluminescence, solvatochromism, and two-photon absorption (2PA) properties were systematically investigated to derive structure-property relationships. All derivatives exhibit two 2PA bands in the 700-1000 nm region: a first band at low energy correlated with a core-to-periphery intramolecular charge transfer that leads to an intense 1PA in the blue-visible range, and a second more intense band at higher energy due to an efficient coupling of the branches through the TPA core. Increasing the strength of the EW end groups or the length of the conjugated spacers and replacing triple-bond linkers with double bonds induces both enhancement and broadening of the 2PA responses, thereby leading to cross-sections up to 2100 GM at peak and higher than 1000 GM over the whole 700-900 nm range. All derivatives exhibit intense photoluminescence (PL) in low- to medium-polarity environments (with quantum yields in the 0.5-0.9 range) and display a strong positive solvatochromic behavior (with Lippert-Mataga specific shifts ranging from 15,000 to 27,500 cm(-1)), triple bonds, and phenyl moieties in the conjugated spacers, thereby leading to larger sensitivities than those of double bonds and thienyl moieties. More hydrophilic derivatives were also shown to be biocompatible, to retain their 2PA and PL properties in biological conditions, and finally to be suitable as polarity sensors for multiphoton cell imaging.
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Affiliation(s)
- Céline Le Droumaguet
- Chimie et Photonique Moléculaires, CNRS UMR 6510, Université de Rennes 1, Campus de Beaulieu, F-35042 Rennes Cedex (France)
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44
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Kramer RH, Mourot A, Adesnik H. Optogenetic pharmacology for control of native neuronal signaling proteins. Nat Neurosci 2013; 16:816-23. [PMID: 23799474 DOI: 10.1038/nn.3424] [Citation(s) in RCA: 156] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 05/07/2013] [Indexed: 12/31/2022]
Abstract
The optical neuroscience revolution is transforming how we study neural circuits. By providing a precise way to manipulate endogenous neuronal signaling proteins, it also has the potential to transform our understanding of molecular neuroscience. Recent advances in chemical biology have produced light-sensitive compounds that photoregulate a wide variety of proteins underlying signaling between and within neurons. Chemical tools for optopharmacology include caged agonists and antagonists and reversibly photoswitchable ligands. These reagents act on voltage-gated ion channels and neurotransmitter receptors, enabling control of neuronal signaling with a high degree of spatial and temporal precision. By covalently attaching photoswitch molecules to genetically tagged proteins, the newly emerging methodology of optogenetic pharmacology allows biochemically precise control in targeted subsets of neurons. Now that the tools for manipulating endogenous neuronal signaling proteins are available, they can be implemented in vivo to enhance our understanding of the molecular bases of brain function and dysfunctions.
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45
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Olson JP, Kwon HB, Takasaki KT, Chiu CQ, Higley MJ, Sabatini BL, Ellis-Davies GCR. Optically selective two-photon uncaging of glutamate at 900 nm. J Am Chem Soc 2013; 135:5954-7. [PMID: 23577752 DOI: 10.1021/ja4019379] [Citation(s) in RCA: 130] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We have synthesized a 7-diethylaminocoumarin (DEAC) derivative that allows wavelength-selective two-photon uncaging at 900 nm versus 720 nm. This new caging chromophore, called DEAC450, has an extended π-electron moiety at the 3-position that shifts the absorption spectrum maximum of DEAC from 375 to 450 nm. Two-photon excitation at 900 nm was more than 60-fold greater than at 720 nm. Two-photon uncaging of DEAC450-Glu at 900 nm at spine heads on pyramidal neurons in acutely isolated brain slices generated postsynaptic responses that were similar to spontaneous postsynaptic excitatory miniature currents, whereas significantly higher energies at 720 nm evoked no currents. Since many nitroaromatic caged compounds are two-photon active at 720 nm, optically selective uncaging of DEAC450-caged biomolecules at 900 nm may allow facile two-color optical interrogation of bimodal signaling pathways in living tissue with high resolution for the first time.
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Affiliation(s)
- Jeremy P Olson
- Department of Neuroscience, Mount Sinai School of Medicine, New York, New York 10029, USA
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46
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Bort G, Gallavardin T, Ogden D, Dalko PI. From One-Photon to Two-Photon Probes: “Caged” Compounds, Actuators, and Photoswitches. Angew Chem Int Ed Engl 2013; 52:4526-37. [DOI: 10.1002/anie.201204203] [Citation(s) in RCA: 208] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Revised: 09/07/2012] [Indexed: 01/09/2023]
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47
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Bort G, Gallavardin T, Ogden D, Dalko PI. Von Ein- zu Zwei-Photonen-Sonden: photoaktivierbare Reagentien, Aktuatoren und Photoschalter. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201204203] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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48
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Picard S, Cueto-Diaz EJ, Genin E, Clermont G, Acher F, Ogden D, Blanchard-Desce M. Tandem triad systems based on FRET for two-photon induced release of glutamate. Chem Commun (Camb) 2013; 49:10805-7. [DOI: 10.1039/c3cc45812a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Ahmed I, Fruk L. The power of light: photosensitive tools for chemical biology. ACTA ACUST UNITED AC 2013; 9:565-70. [DOI: 10.1039/c2mb25407g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Mbatia HW, Burdette SC. Photochemical Tools for Studying Metal Ion Signaling and Homeostasis. Biochemistry 2012; 51:7212-24. [DOI: 10.1021/bi3001769] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Hannah W. Mbatia
- University of Connecticut, 55 North Eagleville
Road, Storrs, Connecticut 06269-3060, United
States
| | - Shawn C. Burdette
- Worcester Polytechnic Institute, 100 Institute Road, Worcester, Massachusetts
01609-2280, United States
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