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Fukumoto Y, Omoda T, Hirai H, Takano S, Harano K, Tsukuda T. Diphosphine-Protected IrAu 12 Superatom with Open Site(s): Synthesis and Programmed Stepwise Assembly. Angew Chem Int Ed Engl 2024; 63:e202402025. [PMID: 38334176 DOI: 10.1002/anie.202402025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 02/07/2024] [Accepted: 02/09/2024] [Indexed: 02/10/2024]
Abstract
One or two phenylacetylide (PA) ligand(s) were successfully removed from the IrAu12 superatomic core of [IrAu12(dppe)5(PA)2]+ (dppe=1,2-bis(diphenylphosphino)ethane) by reaction with controlled amounts of tetrafluoroboric acid. Optical and nuclear magnetic resonance spectroscopies and density functional theory calculations revealed the formation of open Au site(s) on the IrAu12 core of [IrAu12(dppe)5(PA)1]2+ and [IrAu12(dppe)5]3+ with the remaining structure intact. Isocyanide was efficiently trapped at the open electrophilic site on [IrAu12(dppe)5(PA)1]2+, whereas a dimer or trimer of the IrAu12 superatoms was formed using diisocyanide as a linker. These results open the door to designed assembly of chemically modified metal superatoms.
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Affiliation(s)
- Yuto Fukumoto
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Tsubasa Omoda
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
- Present address: Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8552, Japan
| | - Haru Hirai
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Shinjiro Takano
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Koji Harano
- Center for Basic Research on Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Tatsuya Tsukuda
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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2
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Harano K, Nakamuro T, Nakamura E. Cinematographic study of stochastic chemical events at atomic resolution. Microscopy (Oxf) 2024; 73:101-116. [PMID: 37864546 DOI: 10.1093/jmicro/dfad052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 09/07/2023] [Accepted: 10/20/2023] [Indexed: 10/23/2023] Open
Abstract
The advent of single-molecule atomic-resolution time-resolved electron microscopy (SMART-EM) has created a new field of 'cinematic chemistry,' allowing for the cinematographic recording of dynamic behaviors of organic and inorganic molecules and their assembly. However, the limited electron dose per frame of video images presents a major challenge in SMART-EM. Recent advances in direct electron counting cameras and techniques to enhance image quality through the implementation of a denoising algorithm have enabled the tracking of stochastic molecular motions and chemical reactions with sub-millisecond temporal resolution and sub-angstrom localization precision. This review showcases the development of dynamic molecular imaging using the SMART-EM technique, highlighting insights into nanomechanical behavior during molecular shuttle motion, pathways of multistep chemical reactions, and elucidation of crystallization processes at the atomic level.
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Affiliation(s)
- Koji Harano
- Center for Basic Research on Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Takayuki Nakamuro
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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3
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Liu Q, Zhang T, Ikemoto Y, Shinozaki Y, Watanabe G, Hori Y, Shigeta Y, Midorikawa T, Harano K, Sagara Y. Grinding-Induced Water Solubility Exhibited by Mechanochromic Luminescent Supramolecular Fibers. Small 2024:e2400063. [PMID: 38461517 DOI: 10.1002/smll.202400063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 02/28/2024] [Indexed: 03/12/2024]
Abstract
Most mechanochromic luminescent compounds are crystalline and highly hydrophobic; however, mechanochromic luminescent molecular assemblies comprising amphiphilic molecules have rarely been explored. This study investigated mechanochromic luminescent supramolecular fibers composed of dumbbell-shaped 9,10-bis(phenylethynyl)anthracene-based amphiphiles without any tetraethylene glycol (TEG) substituents or with two TEG substituents. Both amphiphiles formed water-insoluble supramolecular fibers via linear hydrogen bond formation. Both compounds acquired water solubility when solid samples composed of supramolecular fibers are ground. Grinding induces the conversion of 1D supramolecular fibers into micellar assemblies where fluorophores can form excimers, thereby resulting in a large redshift in the fluorescence spectra. Excimer emission from the ground amphiphile without TEG chains is retained after dissolution in water. The micelles are stable in water because hydrophilic dendrons surround the hydrophobic luminophores. By contrast, when water is added to a ground amphiphile having TEG substituents, fragmented supramolecular fibers with the same molecular arrangement as the initial supramolecular fibers are observed, because fragmented fibers are thermodynamically preferable to micelles as the hydrophobic arrays of fluorophores are covered with hydrophilic TEG chains. This leads to the recovery of the initial fluorescent properties for the latter amphiphile. These supramolecular fibers can be used as practical mechanosensors to detect forces at the mesoscale.
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Affiliation(s)
- Qiming Liu
- Department of Materials Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8552, Japan
| | - Tianyue Zhang
- Department of Materials Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8552, Japan
| | - Yuka Ikemoto
- Japan Synchrotron Radiation Research Institute/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Yudai Shinozaki
- Department of Physics, School of Science, Kitasato University, 1-15-1 Kitazato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Go Watanabe
- Department of Physics, School of Science, Kitasato University, 1-15-1 Kitazato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
- Department of Data Science, School of Frontier Engineering, Kitasato University, 1-15-1 Kitazato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
- Kanagawa Institute of Industrial Science and Technology (KISTEC), 705-1 Shimoimaizumi, Ebina, Kanagawa, 243-0435, Japan
| | - Yuta Hori
- Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan
| | - Yasuteru Shigeta
- Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan
| | - Takemi Midorikawa
- Center for Basic Research on Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Koji Harano
- Center for Basic Research on Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
- Living Systems Materialogy (LiSM) Research Group, International Research Frontiers Initiative (IRFI), Tokyo Institute of Technology, 4259 Nagatsuda-cho, Midori-ku, Yokohama, Kanagawa, 226-8503, Japan
| | - Yoshimitsu Sagara
- Department of Materials Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8552, Japan
- Living Systems Materialogy (LiSM) Research Group, International Research Frontiers Initiative (IRFI), Tokyo Institute of Technology, 4259 Nagatsuda-cho, Midori-ku, Yokohama, Kanagawa, 226-8503, Japan
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Kimoto K, Kikkawa J, Harano K, Cretu O, Shibazaki Y, Uesugi F. Unsupervised machine learning combined with 4D scanning transmission electron microscopy for bimodal nanostructural analysis. Sci Rep 2024; 14:2901. [PMID: 38316959 DOI: 10.1038/s41598-024-53289-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 01/30/2024] [Indexed: 02/07/2024] Open
Abstract
Unsupervised machine learning techniques have been combined with scanning transmission electron microscopy (STEM) to enable comprehensive crystal structure analysis with nanometer spatial resolution. In this study, we investigated large-scale data obtained by four-dimensional (4D) STEM using dimensionality reduction techniques such as non-negative matrix factorization (NMF) and hierarchical clustering with various optimization methods. We developed software scripts incorporating knowledge of electron diffraction and STEM imaging for data preprocessing, NMF, and hierarchical clustering. Hierarchical clustering was performed using cross-correlation instead of conventional Euclidean distances, resulting in rotation-corrected diffractions and shift-corrected maps of major components. An experimental analysis was conducted on a high-pressure-annealed metallic glass, Zr-Cu-Al, revealing an amorphous matrix and crystalline precipitates with an average diameter of approximately 7 nm, which were challenging to detect using conventional STEM techniques. Combining 4D-STEM and optimized unsupervised machine learning enables comprehensive bimodal (i.e., spatial and reciprocal) analyses of material nanostructures.
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Affiliation(s)
- Koji Kimoto
- Center for Basic Research On Materials, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.
| | - Jun Kikkawa
- Center for Basic Research On Materials, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Koji Harano
- Center for Basic Research On Materials, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Ovidiu Cretu
- Center for Basic Research On Materials, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Yuki Shibazaki
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Japan
| | - Fumihiko Uesugi
- Research Network and Facility Service Division, National Institute for Materials Science, Tsukuba, Japan
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5
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Kikkawa J, Nii A, Sakaniwa Y, Kon N, Sakamaki M, Ohashi T, Nita N, Harano K, Kimoto K. Fast electron damage mechanism of epoxy resin studied by electron energy loss spectroscopy and electron diffraction. J Chem Phys 2023; 159:174708. [PMID: 37933784 DOI: 10.1063/5.0177019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 10/12/2023] [Indexed: 11/08/2023] Open
Abstract
The damage mechanism and exposure tolerance of epoxy resins to fast electrons remain unclear. We quantitatively investigated the effects of electron irradiation on a common epoxy resin by dose-dependent electron energy loss spectroscopy. The results show that sp3 states of nitrogen, oxygen, and their adjacent carbon atoms were converted to sp2 states, forming imine (C=N) and carbonyl (C=O) as the total electron dose increased. The sp3 to sp2 conversion mechanism was proposed. The epoxy resin was very sensitive to fast electrons and the original electronic states were maintained up to a total dose of ∼103e- nm-2 at a low temperature of 103 K. Dose-dependent electron diffraction revealed that the intra- and intermolecular geometries changed below and around the total dose of ∼103e- nm-2.
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Affiliation(s)
- Jun Kikkawa
- Center for Basic Research on Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Aoi Nii
- Innovation Center, Mitsubishi Materials Corporation, 1002-14 Mukohyama, Naka 311-0102, Japan
| | - Yoshiaki Sakaniwa
- Innovation Center, Mitsubishi Materials Corporation, 1-600 Kitabukuro, Omiya, Saitama 330-8508, Japan
| | - Naochika Kon
- Innovation Center, Mitsubishi Materials Corporation, 1002-14 Mukohyama, Naka 311-0102, Japan
| | - Marina Sakamaki
- Innovation Center, Mitsubishi Materials Corporation, 1-600 Kitabukuro, Omiya, Saitama 330-8508, Japan
| | - Touyou Ohashi
- Innovation Center, Mitsubishi Materials Corporation, 1-600 Kitabukuro, Omiya, Saitama 330-8508, Japan
| | - Nobuyasu Nita
- Innovation Center, Mitsubishi Materials Corporation, 1002-14 Mukohyama, Naka 311-0102, Japan
| | - Koji Harano
- Center for Basic Research on Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Koji Kimoto
- Center for Basic Research on Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
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6
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Otsuka C, Takahashi S, Isobe A, Saito T, Aizawa T, Tsuchida R, Yamashita S, Harano K, Hanayama H, Shimizu N, Takagi H, Haruki R, Liu L, Hollamby MJ, Ohkubo T, Yagai S. Supramolecular Polymer Polymorphism: Spontaneous Helix-Helicoid Transition through Dislocation of Hydrogen-Bonded π-Rosettes. J Am Chem Soc 2023; 145:22563-22576. [PMID: 37796243 DOI: 10.1021/jacs.3c07556] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/06/2023]
Abstract
Polymorphism, a phenomenon whereby disparate self-assembled products can be formed from identical molecules, has incited interest in the field of supramolecular polymers. Conventionally, the monomers that constitute supramolecular polymers are engineered to facilitate one-dimensional aggregation and, consequently, their polymorphism surfaces primarily when the states of assembly differ significantly. This engenders polymorphs of divergent dimensionalities such as one- and two-dimensional aggregates. Notwithstanding, realizing supramolecular polymer polymorphism, wherein polymorphs maintain one-dimensional aggregation, persists as a daunting challenge. In this work, we expound upon the manifestation of two supramolecular polymer polymorphs formed from a large discotic supramolecular monomer (rosette), which consists of six hydrogen-bonded molecules with an extended π-conjugated core. These polymorphs are generated in mixtures of chloroform and methylcyclohexane, attributable to distinctly different disc stacking arrangements. The face-to-face (minimal displacement) and offset (large displacement) stacking arrangements can be predicated on their distinctive photophysical properties. The face-to-face stacking results in a twisted helix structure. Conversely, the offset stacking induces inherent curvature in the supramolecular fiber, thereby culminating in a hollow helical coil (helicoid). While both polymorphs exhibit bistability in nonpolar solvent compositions, the face-to-face stacking attains stability purely in a kinetic sense within a polar solvent composition and undergoes conversion into offset stacking through a dislocation of stacked rosettes. This occurs without the dissociation and nucleation of monomers, leading to unprecedented helicoidal folding of supramolecular polymers. Our findings augment our understanding of supramolecular polymer polymorphism, but they also highlight a distinctive method for achieving helicoidal folding in supramolecular polymers.
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Affiliation(s)
- Chie Otsuka
- Division of Advanced Science and Engineering, Graduate School of Science and Engineering, Chiba University, Chiba 263-8522, Japan
| | - Sho Takahashi
- Division of Advanced Science and Engineering, Graduate School of Science and Engineering, Chiba University, Chiba 263-8522, Japan
| | - Atsushi Isobe
- Division of Advanced Science and Engineering, Graduate School of Science and Engineering, Chiba University, Chiba 263-8522, Japan
| | - Takuho Saito
- Division of Advanced Science and Engineering, Graduate School of Science and Engineering, Chiba University, Chiba 263-8522, Japan
| | - Takumi Aizawa
- Division of Advanced Science and Engineering, Graduate School of Science and Engineering, Chiba University, Chiba 263-8522, Japan
| | - Ryoma Tsuchida
- Division of Advanced Science and Engineering, Graduate School of Science and Engineering, Chiba University, Chiba 263-8522, Japan
| | - Shuhei Yamashita
- Division of Advanced Science and Engineering, Graduate School of Science and Engineering, Chiba University, Chiba 263-8522, Japan
| | - Koji Harano
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba 305-0044, Japan
| | - Hiroki Hanayama
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, Chiba 263-8522, Japan
| | - Nobutaka Shimizu
- Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba 305-0801, Japan
| | - Hideaki Takagi
- Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba 305-0801, Japan
| | - Rie Haruki
- Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba 305-0801, Japan
| | - Luzhi Liu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China
| | - Martin J Hollamby
- Department of Chemistry, School of Chemical and Physical Sciences, Keele University, Keele, Staffordshire ST55BG, U.K
| | - Takahiro Ohkubo
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, Chiba 263-8522, Japan
| | - Shiki Yagai
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, Chiba 263-8522, Japan
- Institute for Advanced Academic Research (IAAR), Chiba University, Chiba 263-8522, Japan
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7
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Hoelzel H, Lee S, Amsharov KY, Jux N, Harano K, Nakamura E, Lungerich D. Time-resolved imaging and analysis of the electron beam-induced formation of an open-cage metallo-azafullerene. Nat Chem 2023; 15:1444-1451. [PMID: 37386284 DOI: 10.1038/s41557-023-01261-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 05/26/2023] [Indexed: 07/01/2023]
Abstract
The visualization of single-molecule reactions provides crucial insights into chemical processes, and the ability to do so has grown with the advances in high-resolution transmission electron microscopy. There is currently a limited mechanistic understanding of chemical reactions under the electron beam. However, such reactions may enable synthetic methodologies that cannot be accessed by traditional organic chemistry methods. Here we demonstrate the synthetic use of the electron beam, by in-depth single-molecule, atomic-resolution, time-resolved transmission electron microscopy studies, in inducing the formation of a doubly holed fullerene-porphyrin cage structure from a well-defined benzoporphyrin precursor deposited on graphene. Through real-time imaging, we analyse the hybrid's ability to host up to two Pb atoms, and subsequently probe the dynamics of the Pb-Pb binding motif in this exotic metallo-organic cage structure. Through simulation, we conclude that the secondary electrons, which accumulate in the periphery of the irradiated area, can also initiate chemical reactions. Consequently, designing advanced carbon nanostructures by electron-beam lithography will depend on the understanding and limitations of molecular radiation chemistry.
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Affiliation(s)
- Helen Hoelzel
- Department of Chemistry and Pharmacy, Friedrich-Alexander-University Erlangen-Nuernberg (FAU), Erlangen, Germany
- Department of Chemistry, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Sol Lee
- Center for NanoMedicine, Institute for Basic Science (IBS), Seodaemun-gu, Seoul, South Korea
| | | | - Norbert Jux
- Department of Chemistry and Pharmacy, Friedrich-Alexander-University Erlangen-Nuernberg (FAU), Erlangen, Germany
| | - Koji Harano
- Department of Chemistry, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Dominik Lungerich
- Department of Chemistry, The University of Tokyo, Bunkyo-ku, Tokyo, Japan.
- Center for NanoMedicine, Institute for Basic Science (IBS), Seodaemun-gu, Seoul, South Korea.
- Department of Nano Biomedical Engineering (NanoBME), Advanced Science Institute, Yonsei University, Seoul, South Korea.
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Yang M, Hanayama H, Fang L, Addicoat MA, Guo Y, Graf R, Harano K, Kikkawa J, Jin E, Narita A, Müllen K. Saturated Linkers in Two-Dimensional Covalent Organic Frameworks Boost Their Luminescence. J Am Chem Soc 2023. [PMID: 37339431 DOI: 10.1021/jacs.3c03614] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Abstract
The development of highly luminescent two-dimensional covalent organic frameworks (COFs) for sensing applications remains challenging. To suppress commonly observed photoluminescence quenching of COFs, we propose a strategy involving interrupting the intralayer conjugation and interlayer interactions using cyclohexane as the linker unit. By variation of the building block structures, imine-bonded COFs with various topologies and porosities are obtained. Experimental and theoretical analyses of these COFs disclose high crystallinity and large interlayer distances, demonstrating enhanced emission with record-high photoluminescence quantum yields of up to 57% in the solid state. The resulting cyclohexane-linked COF also exhibits excellent sensing performance for the trace recognition of Fe3+ ions, explosive and toxic picric acid, and phenyl glyoxylic acid as metabolites. These findings inspire a facile and general strategy to develop highly emissive imine-bonded COFs for detecting various molecules.
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Affiliation(s)
- Meijia Yang
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, Guangdong, China
| | - Hiroki Hanayama
- Organic and Carbon Nanomaterials Unit, Okinawa Institute of Science and Technology Graduate University, Kunigami-gun, Okinawa 904-0495, Japan
| | - Long Fang
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, Guangdong, China
| | - Matthew A Addicoat
- School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, U.K
| | - Yunyu Guo
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry and International Center of Future Science, Jilin University, Changchun 130012, China
| | - Robert Graf
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Koji Harano
- Center for Basic Research on Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Jun Kikkawa
- Center for Basic Research on Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Enquan Jin
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
- Organic and Carbon Nanomaterials Unit, Okinawa Institute of Science and Technology Graduate University, Kunigami-gun, Okinawa 904-0495, Japan
| | - Akimitsu Narita
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
- Organic and Carbon Nanomaterials Unit, Okinawa Institute of Science and Technology Graduate University, Kunigami-gun, Okinawa 904-0495, Japan
| | - Klaus Müllen
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
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Ishikawa T, Tanaka F, Kurushima K, Yasuhara A, Sagawa R, Fujita T, Yonesaki R, Iseki K, Nakamuro T, Harano K, Nakamura E. Wavy Graphene-Like Network Forming during Pyrolysis of Polyacrylonitrile into Carbon Fiber. J Am Chem Soc 2023. [PMID: 37248959 DOI: 10.1021/jacs.3c02504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Carbon fiber (CF) obtained by pyrolysis of polyacrylonitrile (PAN-CF) surpasses metals in properties suitable for diverse applications such as aircraft manufacture and power turbine blades. PAN-CF obtained by pyrolysis at 1200-1400 °C shows a remarkably high tensile strength of 7 GPa, much higher than pitch-based CF (pb-CF) consisting of piles of pure graphene networks. However, little information has been available on the atomistic structure of PAN-CF and on how it forms during pyrolysis. We pyrolyzed an acrylonitrile 9-mer in a carbon nanotube, monitored the course of the reaction using atomic-resolution electron microscopy and Raman spectroscopy, and found that this oligomer forms a thermally reactive wavy graphene-like network (WGN) at 1200-1400 °C during slow graphitization taking place between 900 and 1800 °C. Ptychographic microscopic analysis indicated that such material consists of 5-, 6-, and larger-membered rings; hence, it is not flat but wavy. The experimental data suggest that, during PAN-CF manufacturing, many layers of WGN hierarchically pile up to form a chemically and physically interdigitated noncrystalline phase that resists fracture and increases the tensile strength─the properties expected for high-entropy materials. pb-CF using nearly pure carbon starting material, on the other hand, forms a crystalline graphene network and is brittle.
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Affiliation(s)
- Toru Ishikawa
- Composite Materials Research Laboratories, Toray Industries, Inc., 1515 Tsutsui, Masaki-cho, Iyo-gun, Ehime 791-3193, Japan
| | - Fumihiko Tanaka
- Composite Materials Research Laboratories, Toray Industries, Inc., 1515 Tsutsui, Masaki-cho, Iyo-gun, Ehime 791-3193, Japan
- Torayca Technical Department, Toray Industries, Inc., 1515 Tsutsui, Masaki-cho, Iyo-gun, Ehime 791-3193, Japan
| | - Kosuke Kurushima
- Toray Research Center, 3-3-7 Sonoyama, Otsu, Shiga 520-8567, Japan
| | - Akira Yasuhara
- JEOL Ltd., 3-1-2 Musashino, Akishima, Tokyo 196-8558, Japan
| | - Ryusuke Sagawa
- JEOL Ltd., 3-1-2 Musashino, Akishima, Tokyo 196-8558, Japan
| | - Tatsuya Fujita
- Pharmaceutical Research Laboratories, Toray Industries, Inc., 6-10-1 Tebiro, Kamakura, Kanagawa 248-8555, Japan
| | - Ryohei Yonesaki
- Pharmaceutical Research Laboratories, Toray Industries, Inc., 6-10-1 Tebiro, Kamakura, Kanagawa 248-8555, Japan
| | - Katsuhiko Iseki
- Technology Center, Toray Industries, Inc., 1-1, Sonoyama 1-chome, Otsu, Shiga 520-8558, Japan
| | - Takayuki Nakamuro
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Koji Harano
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Center for Basic Research on Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Koppikar S, Oaknin A, Babu KG, Lorusso D, Gupta S, Wu LY, Rajabto W, Harano K, Hong SH, Malik RA, Strebel H, Aggarwal IM, Lai CH, Dejthevaporn T, Tangjitgamol S, Cheng WF, Chay WY, Benavides D, Hashim NM, Moon YW, Yunokawa M, Anggraeni TD, Wei W, Curigliano G, Maheshwari A, Mahantshetty U, Sheshadri S, Peters S, Yoshino T, Pentheroudakis G. Pan-Asian adapted ESMO Clinical Practice Guidelines for the diagnosis, treatment and follow-up of patients with endometrial cancer. ESMO Open 2023; 8:100774. [PMID: 36696825 PMCID: PMC10024150 DOI: 10.1016/j.esmoop.2022.100774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 12/06/2022] [Indexed: 01/25/2023] Open
Abstract
The most recent version of the European Society for Medical Oncology (ESMO) Clinical Practice Guidelines for the diagnosis, treatment and follow-up of patients with endometrial cancer was published in 2022. It was therefore decided, by both the ESMO and the Indian Society of Medical and Paediatric Oncology (ISMPO), to convene a virtual meeting in July 2022 to adapt the ESMO 2022 guidelines to take into account the variations in the management of endometrial cancer in Asia. These guidelines represent the consensus opinion of a panel of Asian experts representing the oncological societies of China (CSCO), India (ISMPO), Indonesia (ISHMO), Japan (JSMO), Korea (KSMO), Malaysia (MOS), the Philippines (PSMO), Singapore (SSO), Taiwan (TOS) and Thailand (TSCO). Voting was based on scientific evidence and was conducted independently of the current treatment practices and treatment access constraints in the different Asian countries, which were discussed when appropriate. The aim of this guideline manuscript is to provide guidance for the optimisation and harmonisation of the management of patients with endometrial cancer across the different regions of Asia, drawing on the evidence provided by Western and Asian trials whilst respecting the variations in clinical presentation, diagnostic practices including molecular profiling and disparities in access to therapeutic options, including drug approvals and reimbursement strategies.
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Affiliation(s)
- S Koppikar
- Department of Medical Oncology, Lilavati Hospital and Research Centre, Mumbai, India; Department of Medical Oncology, Bombay Hospital Institute of Medical Sciences, Mumbai, India.
| | - A Oaknin
- Gynaecologic Cancer Programme, Vall d'Hebron Institute of Oncology (VHIO), Hospital Universitari Vall d'Hebron, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - K Govind Babu
- Department of Medical Oncology, HCG Hospital and St. Johns Medical College, Bengaluru, India
| | - D Lorusso
- Department of Life Science and Public Health, Catholic University of Sacred Heart, Largo Agostino Gemelli, Rome; Department of Women and Child Health, Division of Gynaecologic Oncology, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - S Gupta
- Department of Medical Oncology, Tata Memorial Centre and Homi Bhabha National Institute, Mumbai, India
| | - L-Y Wu
- Department of Gynecologic Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - W Rajabto
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Dr. Cipto Mangunkusumo General Hospital/Faculty of Medicine Universitas Indonesia, Jakarta, Indonesia
| | - K Harano
- Department of Medical Oncology, National Cancer Center Hospital East, Kashiwa, Japan
| | - S-H Hong
- Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - R A Malik
- Clinical Oncology Unit, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - H Strebel
- Division of Medical Oncology, Department of Internal Medicine, University of the Philippines, Philippine General Hospital, Manila, The Philippines
| | - I M Aggarwal
- Department of Gynaecologic Oncology, KK Women's and Children's Hospital, Singapore, Singapore
| | - C-H Lai
- Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital, Linkou Branch, Taoyuan, Taiwan
| | - T Dejthevaporn
- Medical Oncology Unit, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - S Tangjitgamol
- Department of Obstetrics and Gynecology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok, Thailand; Obstetrics and Gynecology Center, Medpark Hospital, Bangkok, Thailand
| | - W F Cheng
- Department of Obstetrics and Gynecology, National Taiwan University Hospital, Taipei, Taiwan
| | - W Y Chay
- Division of Medical Oncology, National Cancer Centre, Singapore, Singapore
| | - D Benavides
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, U.P. College of Medicine and Philippine General Hospital, Manila, The Philippines
| | - N M Hashim
- Oncology and Radiotherapy Department, KPJ Johor Specialist Hospital, Johor Bahru, Malaysia
| | - Y W Moon
- Department of Hematology and Oncology, CHA Bundang Medical Center (CBMC), CHA University, Seongnam, Gyeonggi-do, Republic of Korea
| | - M Yunokawa
- Department of Gynecology and Medical Oncology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research (JFCR), Tokyo, Japan
| | - T D Anggraeni
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Dr. Cipto Mangunkusumo General Hospital/Faculty of Medicine Universitas Indonesia, Jakarta, Indonesia
| | - W Wei
- Department of Gynecologic Oncology, State Key Laboratory of Oncology in South China, Collaborative Innovation Centre for Cancer Medicine, Sun Yat-Sen University Cancer Center, Guangzhou, Guangdong, China
| | - G Curigliano
- European Institute of Oncology, IRCCS, Milano, Italy; Department of Oncology and Hemato-Oncology, University of Milano, Milano, Italy
| | - A Maheshwari
- Department of Gynecologic Oncology, Tata Memorial Centre and Homi Bhabha National Institute, Mumbai, India
| | - U Mahantshetty
- Department of Radiation Oncology, Homi Bhabha Cancer Hospital and Research Hospital, Vishakhapatnam, India
| | - S Sheshadri
- Department of Pathology, Kidwai Memorial Institute of Oncology, Bengaluru, India
| | - S Peters
- Oncology Department, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - T Yoshino
- Department of Gastroenterology and Gastrointestinal Oncology, National Cancer Center Hospital East, Kashiwa, Japan
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11
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Shiraki T, Saito R, Saeki H, Tanaka N, Harano K, Fujigaya T. Defect Photoluminescence from Alkylated Boron Nitride Nanotubes. CHEM LETT 2022. [DOI: 10.1246/cl.220467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Tomohiro Shiraki
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Rioe Saito
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Hayato Saeki
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Naoki Tanaka
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Koji Harano
- Research Center for Advanced Measurement and Characterization, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Tsuyohiko Fujigaya
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
- Center for Molecular Systems (CMS), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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12
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Hasegawa S, Masuda S, Takano S, Harano K, Kikkawa J, Tsukuda T. Synergistically Activated Pd Atom in Polymer-Stabilized Au 23Pd 1 Cluster. ACS Nano 2022; 16:16932-16940. [PMID: 36191255 DOI: 10.1021/acsnano.2c06996] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Single Pd atom doped Au23Pd1 clusters stabilized by polyvinylpyrrolidone (Au23Pd1:PVP) were selectively synthesized by kinetically controlled coreduction of the Au and Pd precursor ions. The geometric structure of Au23Pd1:PVP was investigated by density functional theory calculation, aberration-corrected transmission electron microscopy, extended X-ray absorption fine structure analysis, Fourier transform infrared spectroscopy of adsorbed CO, and hydrogenation catalysis. These results showed that Au23Pd1:PVP takes polydisperse but the same atomic arrangements as undoped Au24:PVP while exposing all the atoms including the Pd atom on the surface. Au23Pd1:PVP exhibited a significantly higher catalytic activity than Au24:PVP for the aerobic oxidation of p-substituted benzyl alcohols. The kinetic studies showed that the rate-determining step was the hydride abstraction from the α-carbon of the alkoxides for both systems. The activation energy for hydride abstraction by Au23Pd1:PVP was lower than that by Au24:PVP, indicating that the doped Pd atom acts as the active center.
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Affiliation(s)
- Shingo Hasegawa
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo113-0033, Japan
| | - Shinya Masuda
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo113-0033, Japan
| | - Shinjiro Takano
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo113-0033, Japan
| | - Koji Harano
- Research Center for Advanced Measurement and Characterization, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki305-0044, Japan
| | - Jun Kikkawa
- Research Center for Advanced Measurement and Characterization, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki305-0044, Japan
| | - Tatsuya Tsukuda
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo113-0033, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto615-8520, Japan
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13
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Harano K, Nakao T, Nishio S, Katsuda T, Tasaki K, Takehara K, Yokoyama T, Furuya H, Hongo K, Asano M, Ikeno T, Wakabayashi M, Sato A, Tanabe H, Taki T, Watanabe R, Ishii G, Mukohara T. 534P A pilot study of neoadjuvant olaparib for patients with HRD-positive advanced ovarian cancer. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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14
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Nakamuro T, Kamei K, Sun K, Bode JW, Harano K, Nakamura E. Time-Resolved Atomistic Imaging and Statistical Analysis of Daptomycin Oligomers with and without Calcium Ions. J Am Chem Soc 2022; 144:13612-13622. [PMID: 35857028 DOI: 10.1021/jacs.2c03949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Daptomycin (DP) is effective against multiple drug-resistant Gram-positive pathogens because of its distinct mechanism of action. An accepted mechanism includes Ca2+-triggered aggregation of the DP molecule to form oligomers. DP and its oligomers have so far defied structural analysis at a molecular level. We studied the ability of DP molecule to aggregate by itself in water, the effects of Ca2+ ions to promote the aggregation, and the connectivity of the DP molecules in the oligomers by the combined use of dynamic light scattering in water and atomic-resolution cinematographic imaging of DP molecules captured on a carbon nanotube on which the DP molecule is installed as a fishhook. We found that the DP molecule aggregates weakly into dimers, trimers, and tetramers in water, and strongly in the presence of calcium ions, and that the tetramer is the largest oligomer in homogeneous aqueous solution. The dimer remains as the major species, and we propose a face-to-face stacked structure based on dynamic imaging using millisecond and angstrom resolution transmission electron microscopy. The tetramer in its cyclic form is the largest oligomer observed, while the trimer forms in its linear form. The study has shown that the DP molecule has an intrinsic property of forming tetramers in water, which is enhanced by the presence of calcium ions. Such experimental structural information will serve as a platform for future drug design. The data also illustrate the utility of cinematographic recording for the study of self-organization processes.
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Affiliation(s)
- Takayuki Nakamuro
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Ko Kamei
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Keyi Sun
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Jeffrey W Bode
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich 8093, Switzerland
| | - Koji Harano
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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15
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Shimizu T, Lungerich D, Harano K, Nakamura E. Time-Resolved Imaging of Stochastic Cascade Reactions over a Submillisecond to Second Time Range at the Angstrom Level. J Am Chem Soc 2022; 144:9797-9805. [PMID: 35609254 DOI: 10.1021/jacs.2c02297] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Many chemical reactions, such as multistep catalytic cycles, are cascade reactions in which a series of transient intermediates appear and disappear stochastically over an extended period. The mechanisms of such reactions are challenging to study, even in ultrafast pump-probe experiments. The dimerization of a van der Waals dimer of [60]fullerene producing a short carbon nanotube is a typical cascade reaction and is probably the most frequently studied in carbon materials chemistry. As many as 23 intermediates were predicted by theory, but only the first stable one has been verified experimentally. With the aid of fast electron microscopy, we obtained cinematographic recordings of individual molecules at a maximum frame rate of 1600 frames per second. Using Chambolle total variation algorithm processing and automated cross-correlation image matching analysis, we report on the identification of several metastable intermediates by their shape and size. Although the reaction events occurred stochastically, varying the lifetime of each intermediate accordingly, the average lifetime for each intermediate structure could be obtained from statistical analysis of many cinematographic images for the cascade reaction. Among the shortest-living intermediates, we detected one that lasted less than 3 ms in three independent cascade reactions. We anticipate that the rapid technological development of microscopy and image processing will soon initiate an era of cinematographic studies of chemical reactions and cinematic chemistry.
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Affiliation(s)
- Toshiki Shimizu
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Dominik Lungerich
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.,Center for Nanomedicine (CNM), Institute for Basic Science (IBS), IBS Hall, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, South Korea.,Graduate Program of Nano Biomedical Engineering (NanoBME), Advanced Science Institute, Yonsei University, Seoul 03722, South Korea
| | - Koji Harano
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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16
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Ravat P, Uchida H, Sekine R, Kamei K, Yamamoto A, Konovalov O, Tanaka M, Yamada T, Harano K, Nakamura E. De Novo Synthesis of Free-Standing Flexible 2D Intercalated Nanofilm Uniform over Tens of cm 2. Adv Mater 2022; 34:e2106465. [PMID: 34651356 DOI: 10.1002/adma.202106465] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 09/12/2021] [Indexed: 06/13/2023]
Abstract
Of a variety of intercalated materials, 2D intercalated systems have attracted much attention both as materials per se, and as a platform to study atoms and molecules confined among nanometric layers. High-precision fabrication of such structures has, however, been a difficult task using the conventional top-down and bottom-up approaches. The de novo synthesis of a 3-nm-thick nanofilm intercalating a hydrogen-bonded network between two layers of fullerene molecules is reported here. The two-layered film can be further laminated into a multiply film either in situ or by sequential lamination. The 3 nm film forms uniformly over an area of several tens of cm2 at an air/water interface and can be transferred to either flat or perforated substrates. A free-standing film in air prepared by transfer to a gold comb electrode shows proton conductivity up to 1.4 × 10-4 S cm-1 . Electron-dose-dependent reversible bending of a free-standing 6-nm-thick nanofilm hung in a vacuum is observed under electron beam irradiation.
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Affiliation(s)
- Prince Ravat
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Hikaru Uchida
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Ryosuke Sekine
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Ko Kamei
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Akihisa Yamamoto
- Center for Integrative Medicine and Physics, Institute for Advanced Study, Kyoto University, Kyoto, 606-8501, Japan
| | - Oleg Konovalov
- European Synchrotron Radiation Facility, Grenoble, 38043, France
| | - Motomu Tanaka
- Center for Integrative Medicine and Physics, Institute for Advanced Study, Kyoto University, Kyoto, 606-8501, Japan
- Physical Chemistry of Biosystems, Institute of Physical Chemistry, Heidelberg University, Heidelberg, 69120, Germany
| | - Teppei Yamada
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Koji Harano
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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17
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Hasegawa S, Masuda S, Takano S, Harano K, Tsukuda T. Polymer-Stabilized Au 38 Cluster: Atomically Precise Synthesis by Digestive Ripening and Characterization of the Atomic Structure and Oxidation Catalysis. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01355] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Shingo Hasegawa
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shinya Masuda
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shinjiro Takano
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Koji Harano
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Tatsuya Tsukuda
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
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18
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Lungerich D, Hoelzel H, Harano K, Jux N, Amsharov KY, Nakamura E. A Singular Molecule-to-Molecule Transformation on Video: The Bottom-Up Synthesis of Fullerene C 60 from Truxene Derivative C 60H 30. ACS Nano 2021; 15:12804-12814. [PMID: 34018713 DOI: 10.1021/acsnano.1c02222] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Singular reaction events of small molecules and their dynamics remain a hardly understood territory in chemical sciences since spectroscopy relies on ensemble-averaged data, and microscopic scanning probe techniques show snapshots of frozen scenes. Herein, we report on continuous high-resolution transmission electron microscopic video imaging of the electron-beam-induced bottom-up synthesis of fullerene C60 through cyclodehydrogenation of tailor-made truxene derivative 1 (C60H30), which was deposited on graphene as substrate. During the reaction, C60H30 transformed in a multistep process to fullerene C60. Hereby, the precursor, metastable intermediates, and the product were identified by correlations with electron dose-corrected molecular simulations and single-molecule statistical analysis, which were substantiated with extensive density functional theory calculations. Our observations revealed that the initial cyclodehydrogenation pathway leads to thermodynamically favored intermediates through seemingly classical organic reaction mechanisms. However, dynamic interactions of the intermediates with the substrate render graphene as a non-innocent participant in the dehydrogenation process, which leads to a deviation from the classical reaction pathway. Our precise visual comprehension of the dynamic transformation implies that the outcome of electron-beam-initiated reactions can be controlled with careful molecular precursor design, which is important for the development and design of materials by electron beam lithography.
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Affiliation(s)
- Dominik Lungerich
- Center for Nanomedicine (CNM), Institute for Basic Science (IBS), IBS Hall, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
- Graduate Program of Nano Biomedical Engineering (NanoBME), Advanced Science Institute, Yonsei University, Seoul, 03722, South Korea
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Helen Hoelzel
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Department of Chemistry and Pharmacy, Organic Chemistry II, Friedrich-Alexander-University Erlangen-Nuernberg (FAU), Nikolaus-Fiebiger-Str. 10, 91058, Erlangen, Germany
| | - Koji Harano
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Norbert Jux
- Department of Chemistry and Pharmacy, Organic Chemistry II, Friedrich-Alexander-University Erlangen-Nuernberg (FAU), Nikolaus-Fiebiger-Str. 10, 91058, Erlangen, Germany
| | - Konstantin Yu Amsharov
- Department of Chemistry, Martin-Luther-University Halle-Wittenberg, Kurt-Mothes-Str. 2, 06120 Halle, Germany
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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19
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Hasegawa S, Takano S, Harano K, Tsukuda T. New Magic Au 24 Cluster Stabilized by PVP: Selective Formation, Atomic Structure, and Oxidation Catalysis. JACS Au 2021; 1:660-668. [PMID: 34467325 PMCID: PMC8395683 DOI: 10.1021/jacsau.1c00102] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Indexed: 06/13/2023]
Abstract
An unprecedented magic number cluster, Au24Cl x (x = 0-3), was selectively synthesized by the kinetically controlled reduction of the Au precursor ions in a microfluidic mixer in the presence of a large excess of poly(N-vinyl-2-pyrrolidone) (PVP). The atomic structure of the PVP-stabilized Au24Cl x was investigated by means of aberration-corrected transmission electron microscopy (ACTEM) and density functional theory (DFT) calculations. ACTEM video imaging revealed that the Au24Cl x clusters were stable against dissociation but fluctuated during the observation period. Some of the high-resolution ACTEM snapshots were explained by DFT-optimized isomeric structures in which all the constituent atoms were located on the surface. This observation suggests that the featureless optical spectrum of Au24Cl x is associated with the coexistence of distinctive isomers. X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy of CO adsorbates revealed the electron-rich nature of Au24Cl x clusters due to the interaction with PVP. The Au24Cl x :PVP clusters catalyzed the aerobic oxidation of benzyl alcohol derivatives without degradation. Hammett analysis and the kinetic isotope effect indicated that the hydride elimination by Au24Cl x was the rate-limiting step with an apparent activation energy of 56 ± 3 kJ/mol, whereas the oxygen pressure dependence of the reaction kinetics suggested the involvement of hydrogen abstraction by coadsorbed O2 as a faster process.
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Affiliation(s)
- Shingo Hasegawa
- Department
of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shinjiro Takano
- Department
of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Koji Harano
- Department
of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Tatsuya Tsukuda
- Department
of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Elements
Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
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20
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Abstract
Cyclodextrins (CDs) are doughnut-shaped cyclic oligosaccharides having a cavity and two rims. Inclusion binding in the cavity has long served as a classic model of molecular recognition, and rim binding has been neglected. We found that CDs recognize guests by size-sensitive binding using the two rims in addition to the cavity, using single-molecule electron microscopy and a library of graphitic cones as a solid-state substrate for complexation. For example, with its cavity and rim binding ability combined, γ-CD can recognize a guest of radius between 4 and 9 Å with a size-recognition precision of better than 1 Å, as shown by structural analysis of thousands of individual specimens and statistical analysis of the data thereof. A 2.5 ms resolution electron microscopic video provided direct evidence of the process of size recognition. The data suggest the occurrence of the rim binding mode for guests larger than the size of the CD cavity and illustrate a unique application of dynamic molecular electron microscopy for deciphering the spatiotemporal details of supramolecular events.
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Affiliation(s)
- Hiroki Hanayama
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Junya Yamada
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Issei Tomotsuka
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Koji Harano
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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21
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Osugi S, Takano S, Masuda S, Harano K, Tsukuda T. Few-nm-sized, phase-pure Au 5Sn intermetallic nanoparticles: synthesis and characterization. Dalton Trans 2021; 50:5177-5183. [PMID: 33881079 DOI: 10.1039/d1dt00132a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Nanoparticles of intermetallic compounds have attracted much interest because they can exhibit novel electronic and catalytic properties due to their specific crystal structure, ordered atomic arrangement, and quantum effect. Here, gold-tin (AuSn) bimetallic nanoparticles with various mixing ratios were prepared by a co-reduction method using various protective agents (e.g., polymer, amine, phosphine, carboxylic acid, and thiol). Powder X-ray diffractometry and transmission electron microscopy revealed that few-nm-sized, phase-pure Au5Sn intermetallic nanoparticles (IMNPs) were successfully synthesized when Au3+ and Sn2+ precursors with a ratio of 6 : 4 were co-reduced in the presence of oleylamine. The Au5Sn IMNPs thus prepared did not exhibit localized surface plasmon resonance, in contrast to pure Au nanoparticles of comparable sizes. This suggests that interband transition dominates the optical response due to an increase in the density of states near the Fermi level by introducing Sn. The Au5Sn IMNPs supported on mesoporous silica (SBA-15) catalyzed the aerobic oxidation reaction of indanol.
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Affiliation(s)
- Satoshi Osugi
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0031, Japan.
| | - Shinjiro Takano
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0031, Japan.
| | - Shinya Masuda
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0031, Japan.
| | - Koji Harano
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0031, Japan.
| | - Tatsuya Tsukuda
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0031, Japan. and Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
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22
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Sekine R, Ravat P, Yanagisawa H, Liu C, Kikkawa M, Harano K, Nakamura E. Nano- and Microspheres Containing Inorganic and Biological Nanoparticles: Self-Assembly and Electron Tomographic Analysis. J Am Chem Soc 2021; 143:2822-2828. [PMID: 33535757 DOI: 10.1021/jacs.0c11944] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Organofullerene amphiphiles show diverse behaviors in water, forming vesicles, micelles, Langmuir-Blodgett films, and anisotropic nanostructures. We found that gradual in situ protonation of an organic solution of (4-heptylphenyl)5C60-K+ by water or buffer generates the corresponding protonated molecule, (4-heptylphenyl)5C60H, which self-assembles to form nano- and microspheres of organofullerene (fullerspheres) with uniform diameters ranging from 30 nm to 2.5 μm that are controlled by the preparation or pH of the buffer. By using an aqueous solution of an organic dye, inorganic nanoparticle, protein, and virus, we encapsulated these entities in the fullersphere. This approach via self-assembly is distinct from other preparations of organic core-shell particles that generally require polymerization for the construction of a robust shell. The sphere is entirely amorphous, thermally stable up to 300 °C under vacuum, and resistant to electron irradiation, and we found the unconventional utility of the sphere for electron tomographic imaging of nanoparticles and biomaterials.
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Affiliation(s)
- Ryosuke Sekine
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Prince Ravat
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Haruaki Yanagisawa
- Department of Cell Biology and Anatomy, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Chao Liu
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masahide Kikkawa
- Department of Cell Biology and Anatomy, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Koji Harano
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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23
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Kratish Y, Nakamuro T, Liu Y, Li J, Tomotsuka I, Harano K, Nakamura E, Marks TJ. Synthesis and Characterization of a Well-Defined Carbon Nanohorn-Supported Molybdenum Dioxo Catalyst by SMART-EM Imaging. Surface Structure at the Atomic Level. BCSJ 2021. [DOI: 10.1246/bcsj.20200299] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Yosi Kratish
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, USA
| | - Takayuki Nakamuro
- Department of Chemistry, The University of Tokyo, Tokyo 113-0033, Japan
| | - Yiqi Liu
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, USA
| | - Jiaqi Li
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, USA
| | - Issei Tomotsuka
- Department of Chemistry, The University of Tokyo, Tokyo 113-0033, Japan
| | - Koji Harano
- Department of Chemistry, The University of Tokyo, Tokyo 113-0033, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo, Tokyo 113-0033, Japan
| | - Tobin J. Marks
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, USA
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24
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Affiliation(s)
- Koji Harano
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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25
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Abstract
Crystallization is the process of atoms or molecules forming an organized solid via nucleation and growth. Being intrinsically stochastic, the research at an atomistic level has been a huge experimental challenge. We report herein in situ detection of a crystal nucleus forming during nucleation/growth of a NaCl nanocrystal, as video recorded in the interior of a vibrating conical carbon nanotube at 20-40 ms frame-1 with localization precision of <0.1 nm. We saw NaCl units assembled to form a cluster fluctuating between featureless and semiordered states, which suddenly formed a crystal. Subsequent crystal growth at 298 K and shrinkage at 473 K took place also in a stochastic manner. Productive contributions of the graphitic surface and its mechanical vibration have been experimentally indicated.
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Affiliation(s)
- Takayuki Nakamuro
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masaya Sakakibara
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hiroki Nada
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba 305-8569, Japan
| | - Koji Harano
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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26
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Kamei K, Shimizu T, Harano K, Nakamura E. Aryl Radical Addition to Curvatures of Carbon Nanohorns for Single-Molecule-Level Molecular Imaging. BCSJ 2020. [DOI: 10.1246/bcsj.20200232] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ko Kamei
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Toshiki Shimizu
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Koji Harano
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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27
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Matsuura R, Hiraishi A, Holzman LB, Hanayama H, Harano K, Nakamura E, Hamasaki Y, Doi K, Nangaku M, Noiri E. SHROOM3, the gene associated with chronic kidney disease, affects the podocyte structure. Sci Rep 2020; 10:21103. [PMID: 33273487 PMCID: PMC7713385 DOI: 10.1038/s41598-020-77952-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 11/15/2020] [Indexed: 01/11/2023] Open
Abstract
Chronic kidney disease is a public health burden and it remains unknown which genetic loci are associated with kidney function in the Japanese population, our genome-wide association study using the Biobank Japan dataset (excluding secondary kidney diseases, such as diabetes mellitus) clearly revealed that almost half of the top 50 single nucleotide polymorphisms associated with estimated glomerular filtration rate are located in the SHROOM3 gene, suggesting that SHROOM3 will be responsible for kidney function. Thus, to confirm this finding, supportive functional analyses were performed on Shroom3 in mice using fullerene-based siRNA delivery, which demonstrated that Shroom3 knockdown led to albuminuria and podocyte foot process effacement. The in vitro experiment shows that knockdown of Shroom3 caused defective formation of lamellipodia in podocyte, which would lead to the disruption of slit diaphragm. These results from the GWAS, in vivo and in vitro experiment were consistent with recent studies reporting that albuminuria leads to impairment of kidney function.
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Affiliation(s)
- Ryo Matsuura
- Department of Nephrology and Endocrinology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Atsuko Hiraishi
- Department of Nephrology and Endocrinology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
- Division of Genomic Medicine and Disease Prevention, Institute of Medical Science, The University of Tokyo, Shirokanedai, 4-6-1 Minato-ku, Tokyo, 108-8639, Japan
| | - Lawrence B Holzman
- Renal Electrolyte and Hypertension Division, Perelman School of Medicine, University of Pennsylvania, Philadelphia, 19104, USA
| | - Hiroki Hanayama
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Koji Harano
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Yoshifumi Hamasaki
- Department of Hemodialysis and Apheresis, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Kent Doi
- Department of Acute Medicine, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Masaomi Nangaku
- Department of Nephrology and Endocrinology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Eisei Noiri
- Department of Nephrology and Endocrinology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
- National Center Biobank Network, National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku, Tokyo, 162-8655, Japan.
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28
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Shimizu T, Lungerich D, Stuckner J, Murayama M, Harano K, Nakamura E. Real-Time Video Imaging of Mechanical Motions of a Single Molecular Shuttle with Sub-Millisecond Sub-Angstrom Precision. BCSJ 2020. [DOI: 10.1246/bcsj.20200134] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Toshiki Shimizu
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Dominik Lungerich
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Joshua Stuckner
- Materials Science and Engineering Department, Virginia Tech, Blacksburg, VA 24061, USA
| | - Mitsuhiro Murayama
- Materials Science and Engineering Department, Virginia Tech, Blacksburg, VA 24061, USA
- Reactor Materials and Mechanical Design Group, Energy and Environmental Directorate, Pacific Northwest National Laboratory, Richland, WA 99352
- Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Koji Harano
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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29
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Nakamuro T, Yamashita K, Yanagisawa H, Nureki O, Kikkawa M, Hamada H, Shang R, Harano K, Nakamura E. Microcrystal electron crystallographic analysis of organic solid solution (mixed crystal). Acta Crystallogr A Found Adv 2020. [DOI: 10.1107/s0108767320097895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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30
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Stuckner J, Shimizu T, Harano K, Nakamura E, Murayama M. Ultra-Fast Electron Microscopic Imaging of Single Molecules With a Direct Electron Detection Camera and Noise Reduction. Microsc Microanal 2020; 26:667-675. [PMID: 32684204 DOI: 10.1017/s1431927620001750] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Time-resolved imaging of molecules and materials made of light elements is an emerging field of transmission electron microscopy (TEM), and the recent development of direct electron detection cameras, capable of taking as many as 1,600 fps, has potentially broadened the scope of the time-resolved TEM imaging in chemistry and nanotechnology. However, such a high frame rate reduces electron dose per frame, lowers the signal-to-noise ratio (SNR), and renders the molecular images practically invisible. Here, we examined image noise reduction to take the best advantage of fast cameras and concluded that the Chambolle total variation denoising algorithm is the method of choice, as illustrated for imaging of a molecule in the 1D hollow space of a carbon nanotube with ~1 ms time resolution. Through the systematic comparison of the performance of multiple denoising algorithms, we found that the Chambolle algorithm improves the SNR by more than an order of magnitude when applied to TEM images taken at a low electron dose as required for imaging at around 1,000 fps. Open-source code and a standalone application to apply Chambolle denoising to TEM images and video frames are available for download.
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Affiliation(s)
- Joshua Stuckner
- Material Science and Engineering Department, Virginia Polytechnic Institute and State University, 109A Surge, 400 Stanger Street, Blacksburg, VA24060, USA
| | - Toshiki Shimizu
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo113-0033, Japan
| | - Koji Harano
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo113-0033, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo113-0033, Japan
| | - Mitsuhiro Murayama
- Material Science and Engineering Department, Virginia Polytechnic Institute and State University, 109A Surge, 400 Stanger Street, Blacksburg, VA24060, USA
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31
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Hamada H, Nakamuro T, Yamashita K, Yanagisawa H, Nureki O, Kikkawa M, Harano K, Shang R, Nakamura E. Spiro-Conjugated Carbon/Heteroatom-Bridgedp-Phenylenevinylenes: Synthesis, Properties, and Microcrystal Electron Crystallographic Analysis of Racemic Solid Solutions. BCSJ 2020. [DOI: 10.1246/bcsj.20200065] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hiroyoshi Hamada
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - Takayuki Nakamuro
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - Keitaro Yamashita
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - Haruaki Yanagisawa
- Department of Cell Biology and Anatomy, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Osamu Nureki
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - Masahide Kikkawa
- Department of Cell Biology and Anatomy, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Koji Harano
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - Rui Shang
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - Eiichi Nakamura
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
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32
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Hanayama H, Yamada J, Harano K, Nakamura E. Cyclodextrins as Surfactants for Solubilization and Purification of Carbon Nanohorn Aggregates. Chem Asian J 2020; 15:1549-1552. [DOI: 10.1002/asia.202000273] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 03/18/2020] [Indexed: 12/27/2022]
Affiliation(s)
- Hiroki Hanayama
- Department of ChemistryThe University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan
| | - Junya Yamada
- Department of ChemistryThe University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan
| | - Koji Harano
- Department of ChemistryThe University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan
| | - Eiichi Nakamura
- Department of ChemistryThe University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan
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33
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Miyake R, Nitanai Y, Nakagawa Y, Xing J, Harano K, Nakamura E, Okabayashi J, Minamikawa T, Uruma K, Kanaizuka K, Kurihara M. Preparation of Hierarchically Assembled Silver Nanostructures based on the Morphologies of Crystalline Peptide-Silver(I) Complexes. Chempluschem 2020; 84:295-301. [PMID: 31950758 DOI: 10.1002/cplu.201800666] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 02/21/2019] [Indexed: 11/09/2022]
Abstract
The preparation of a hierarchically assembled Ag nanostructures based on a nanocrystalline assembly was demonstrated using an Ag(I) complex of a dipeptide (AspDap). By heating under N2 gas, a spherical assembly of a nanocrystalline dipeptide-Ag(I) complex (diameter 4-5 μm), which has a morphology similar to the assembled structure of the dipeptide, was transformed to an assembly of Ag nanostructures, where the micrometre-order crystalline morphology was maintained. In addition, detailed scanning electron microscopy studies revealed that Ag nanoparticles (diameter ca. 10 nm) were formed on the surface of the Ag nanostructure. When the Ag(I) ions were reduced to Ag(0), this phenomenon exhibited surface dependence due to the anisotropic two-dimensional Ag(I) arrangement in the crystals. Thermogravimetric measurements and X-ray photoelectron spectroscopy revealed that the reduction proceeds in a stepwise manner around 200-250 °C, together with the removal of primary and secondary carboxylic groups in the dipeptide. Comparison with the heating process of the crystalline Ag(I) complex of β-alanine indicated that stepwise reduction is key for maintaining the original micrometre-order morphology.
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Affiliation(s)
- Ryosuke Miyake
- Department of Chemistry and Biochemistry Graduate School of Humanities and Sciences, Ochanomizu University, 2-1-1 Otsuka, Bunkyo-ku, Tokyo, 112-8610, Japan.,JST, PRESTO, 4-1-8, Honcho, Kawaguchi, Saitama, 332-0012, Japan
| | - Yukari Nitanai
- Department of Chemistry and Biochemistry Graduate School of Humanities and Sciences, Ochanomizu University, 2-1-1 Otsuka, Bunkyo-ku, Tokyo, 112-8610, Japan
| | - Yuki Nakagawa
- Department of Chemistry and Biochemistry Graduate School of Humanities and Sciences, Ochanomizu University, 2-1-1 Otsuka, Bunkyo-ku, Tokyo, 112-8610, Japan
| | - Junfei Xing
- Department of Chemistry Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunky-ku, Tokyo, 113-0033, Japan
| | - Koji Harano
- Department of Chemistry Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunky-ku, Tokyo, 113-0033, Japan
| | - Eiichi Nakamura
- Department of Chemistry Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunky-ku, Tokyo, 113-0033, Japan
| | - Jun Okabayashi
- Research Center for Spectrochemistry Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunky-ku, Tokyo, 113-0033, Japan
| | - Takeo Minamikawa
- Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minami-Josanjima, Tokushima, Tokushima, 770-8506, Japan
| | - Keirei Uruma
- Department of Material and Biological Chemistry, Yamagata Univeristy, 1-4-12 Kojirakawa-mchi, Yamagata, Yamagata, 990-8560, Japan
| | - Katsuhiko Kanaizuka
- Department of Material and Biological Chemistry, Yamagata Univeristy, 1-4-12 Kojirakawa-mchi, Yamagata, Yamagata, 990-8560, Japan
| | - Masato Kurihara
- Department of Material and Biological Chemistry, Yamagata Univeristy, 1-4-12 Kojirakawa-mchi, Yamagata, Yamagata, 990-8560, Japan
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34
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Foianesi-Takeshige LH, Takahashi S, Tateishi T, Sekine R, Okazawa A, Zhu W, Kojima T, Harano K, Nakamura E, Sato H, Hiraoka S. Bifurcation of self-assembly pathways to sheet or cage controlled by kinetic template effect. Commun Chem 2019. [DOI: 10.1038/s42004-019-0232-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Abstract
The template effect is a key feature to control the arrangement of building blocks in assemblies, but its kinetic nature remains elusive compared to the thermodynamic aspects, with the exception of very simple reactions. Here we report a kinetic template effect in a self-assembled cage composed of flexible ditopic ligands and Pd(II) ions. Without template anion, a micrometer-sized sheet is kinetically trapped (off-pathway), which is converted into the thermodynamically most stable cage by the template anion. When the template anion is present from the start, the cage is selectively produced by the preferential cyclization of a dinuclear intermediate (on-pathway). Quantitative and numerical analyses of the self-assembly of the cage on the on-pathway revealed that the accelerating effect of the template is stronger for the early stage reactions of the self-assembly than for the final cage formation step itself, indicating the kinetic template effect.
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Fujiwara K, Chou HH, Kim JW, Tan D, Tamura K, Katsumata N, Harano K, Hasegawa K, Hume S, Jones E, Goble S, Sullivan L, Shih D, Coleman R, McNeish I, Monk B, Kristeleit R. ATHENA (GOG-3020/ENGOT-ov45): A randomised, double-blind, placebo-controlled phase III study of the poly (ADP-ribose) polymerase (PARP) inhibitor rucaparib + the PD-1 inhibitor nivolumab following frontline platinum-based chemotherapy in ovarian cancer. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz426.038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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36
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Yunokawa M, Takahashi S, Aoki D, Yonemori K, Hara H, Hasegawa K, Takehara K, Harano K, Nomura H, Noguchi E, Horie K, Ogasawara A, Okame S, Doi T. First-in-human phase I study of TAS-117, an allosteric AKT inhibitor, in patients with advanced solid tumours. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz244.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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37
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Naumann R, Oaknin A, Meyer T, Lopez-Picazo J, Lao C, Bang YJ, Boni V, Sharfman W, Park J, Devriese L, Harano K, Chung C, Topalian S, Zaki K, Chen T, Gu J, Li B, Barrows A, Horvath A, Moore K. Efficacy and safety of nivolumab (Nivo) + ipilimumab (Ipi) in patients (pts) with recurrent/metastatic (R/M) cervical cancer: Results from CheckMate 358. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz394.059] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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38
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Abstract
Amphiphiles are used for a variety of applications in our daily life and in industrial processes. They typically possess hydrophobic and hydrophilic moieties within the molecule, thereby performing a myriad of functions through the formation of two- and three-dimensional assemblies in water, such as Gibbs monolayers and micelles. However, these functions are often inseparable because they emerge from the same structural feature of the molecule, and are difficult to control because the structural diversity is limited to either long-chain hydrocarbons bearing a polar end group(s) or polymers bearing polar groups exposed to the exterior surface. In this Account, we describe the chemistry of a new class of amphiphiles, conical fullerene amphiphiles (CFAs), utilizing a superhydrophobic [60]fullerene group as a nonpolar apex with added structural features to make it soluble in water. By selective functionalization of only one side of the fullerene molecule, the CFA molecules spontaneously assemble in water through strong hydrophobic interactions among the fullerene apexes and exhibit unusual supramolecular and interfacial behavior. They form unilamellar micelles and vesicles at a critical aggregation concentration as low as micromolar, not showing any air-water and oil-water interfacial activity. The strong preference for self-assembly in water over monolayer formation at an air-water interface makes CFAs unique among conventional nonpolymeric surfactants. The CFA assemblies are often so mechanically robust that they can be transferred to the surface of a solid substrate and analyzed by high-resolution microscopy. Because of this rigid conical structure of a few nanometers in size, CFA molecules aggregate readily in water to form a hierarchical assembly with biomolecules and nanomaterials while maintaining the structural integrity of the CFA aggregate to form multicomponent agglomerates of controllable structural features. For instance, tissue-selective in vivo transport of DNA and siRNA has been achieved. Hybridization of a CFA vesicle with a transition metal catalyst enables the construction of a structurally defined nanospace and an interface for precise control of the nanoscale morphology of polymers. Solubilization of hydrophobic nanocarbons and nanoparticles is also achieved through hemimicelle formation on solid surfaces. The examples reported here illustrate the potential of the conical fullerene motif for the design of amphiphiles as well as supramolecular structures at molecular and tens of nanometers scale.
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Affiliation(s)
- Koji Harano
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Harano K, Wang Y, Masuda H, Lim B, Parinyanitikul N, Lee HJ, Seitz RS, Morris SW, Bailey DB, Hout DR, Rao A, Lucci A, Tripathy D, Krishnamurthy S, Ueno NT. Abstract P3-08-02: Withdrawn. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p3-08-02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
This abstract was withdrawn by the authors.
Citation Format: Harano K, Wang Y, Masuda H, Lim B, Parinyanitikul N, Lee H-J, Seitz RS, Morris SW, Bailey DB, Hout DR, Rao A, Lucci A, Tripathy D, Krishnamurthy S, Ueno NT. Withdrawn [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P3-08-02.
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Affiliation(s)
- K Harano
- The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University, Shinagawa-ku, Tokyo, Japan; Chulalongkorn University, Pathumwan, Bangkok, Thailand; Asan Medical Center, Songpa-gu, Seoul, Korea; Insight Genetics, Inc., Nashville, TN; University of Michigan, Ann Arbor, MI
| | - Y Wang
- The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University, Shinagawa-ku, Tokyo, Japan; Chulalongkorn University, Pathumwan, Bangkok, Thailand; Asan Medical Center, Songpa-gu, Seoul, Korea; Insight Genetics, Inc., Nashville, TN; University of Michigan, Ann Arbor, MI
| | - H Masuda
- The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University, Shinagawa-ku, Tokyo, Japan; Chulalongkorn University, Pathumwan, Bangkok, Thailand; Asan Medical Center, Songpa-gu, Seoul, Korea; Insight Genetics, Inc., Nashville, TN; University of Michigan, Ann Arbor, MI
| | - B Lim
- The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University, Shinagawa-ku, Tokyo, Japan; Chulalongkorn University, Pathumwan, Bangkok, Thailand; Asan Medical Center, Songpa-gu, Seoul, Korea; Insight Genetics, Inc., Nashville, TN; University of Michigan, Ann Arbor, MI
| | - N Parinyanitikul
- The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University, Shinagawa-ku, Tokyo, Japan; Chulalongkorn University, Pathumwan, Bangkok, Thailand; Asan Medical Center, Songpa-gu, Seoul, Korea; Insight Genetics, Inc., Nashville, TN; University of Michigan, Ann Arbor, MI
| | - H-J Lee
- The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University, Shinagawa-ku, Tokyo, Japan; Chulalongkorn University, Pathumwan, Bangkok, Thailand; Asan Medical Center, Songpa-gu, Seoul, Korea; Insight Genetics, Inc., Nashville, TN; University of Michigan, Ann Arbor, MI
| | - RS Seitz
- The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University, Shinagawa-ku, Tokyo, Japan; Chulalongkorn University, Pathumwan, Bangkok, Thailand; Asan Medical Center, Songpa-gu, Seoul, Korea; Insight Genetics, Inc., Nashville, TN; University of Michigan, Ann Arbor, MI
| | - SW Morris
- The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University, Shinagawa-ku, Tokyo, Japan; Chulalongkorn University, Pathumwan, Bangkok, Thailand; Asan Medical Center, Songpa-gu, Seoul, Korea; Insight Genetics, Inc., Nashville, TN; University of Michigan, Ann Arbor, MI
| | - DB Bailey
- The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University, Shinagawa-ku, Tokyo, Japan; Chulalongkorn University, Pathumwan, Bangkok, Thailand; Asan Medical Center, Songpa-gu, Seoul, Korea; Insight Genetics, Inc., Nashville, TN; University of Michigan, Ann Arbor, MI
| | - DR Hout
- The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University, Shinagawa-ku, Tokyo, Japan; Chulalongkorn University, Pathumwan, Bangkok, Thailand; Asan Medical Center, Songpa-gu, Seoul, Korea; Insight Genetics, Inc., Nashville, TN; University of Michigan, Ann Arbor, MI
| | - A Rao
- The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University, Shinagawa-ku, Tokyo, Japan; Chulalongkorn University, Pathumwan, Bangkok, Thailand; Asan Medical Center, Songpa-gu, Seoul, Korea; Insight Genetics, Inc., Nashville, TN; University of Michigan, Ann Arbor, MI
| | - A Lucci
- The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University, Shinagawa-ku, Tokyo, Japan; Chulalongkorn University, Pathumwan, Bangkok, Thailand; Asan Medical Center, Songpa-gu, Seoul, Korea; Insight Genetics, Inc., Nashville, TN; University of Michigan, Ann Arbor, MI
| | - D Tripathy
- The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University, Shinagawa-ku, Tokyo, Japan; Chulalongkorn University, Pathumwan, Bangkok, Thailand; Asan Medical Center, Songpa-gu, Seoul, Korea; Insight Genetics, Inc., Nashville, TN; University of Michigan, Ann Arbor, MI
| | - S Krishnamurthy
- The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University, Shinagawa-ku, Tokyo, Japan; Chulalongkorn University, Pathumwan, Bangkok, Thailand; Asan Medical Center, Songpa-gu, Seoul, Korea; Insight Genetics, Inc., Nashville, TN; University of Michigan, Ann Arbor, MI
| | - NT Ueno
- The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University, Shinagawa-ku, Tokyo, Japan; Chulalongkorn University, Pathumwan, Bangkok, Thailand; Asan Medical Center, Songpa-gu, Seoul, Korea; Insight Genetics, Inc., Nashville, TN; University of Michigan, Ann Arbor, MI
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Masuda H, Miura S, Harano K, Wang Y, Hirota Y, Matsunaga Y, Lim B, Lucci A, Parinyanitikul N, Lee HJ, Gong G, Rao A, Seitz RS, Morris SW, Hout DR, Nakamura S, Tripathy D, Harada O, Krishnamurthy S, Ueno NT. Abstract P4-02-05: Apocrine morphology and LAR molecular subtype predict prognosis of TNBC patients with residual disease after neoadjuvant chemotherapy. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p4-02-05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: TNBC molecular subtype classification updated by Lehmann et al. includes 4 subtypes: basal-like 1 and 2 (BL1), (BL2), mesenchymal (M), and luminal androgen receptor (LAR), and as a modifier of these subtypes, an Immunomodulatory (IM) gene expression signature. However, molecular subtypes have not been linked to morphological features of TNBC. Apocrine carcinoma has been proposed as a TNBC category that expresses androgen receptor. LAR-subtype TNBC has a poor response to neoadjuvant systemic therapy (NST). We hypothesized that defining the apocrine-featured TNBC by morphology and molecular subtype predict the prognosis of patients with residual disease after NST. Methods: We created the Pan-Pacific TNBC Consortium dataset, which contains paired samples of matched pre and post-NST TNBC tumors from 4 institutions. All patients received NST and didn't have a pathological complete response (pCR). Three pathologists examined hematoxylin and eosin-stained slides of 86 pre-NST samples and determined (1) the presence of apocrine differentiation, (2) the level of tumor-infiltrating lymphocytes (TILs), (3) the histological grade (HG), and (4) the rate of necrosis. These morphological features were compared among the subtypes. For a sample to be considered apocrine positive, apocrine differentiation had to be identified by 2 or more pathologists. Fisher's exact test was used to test the association of subtypes and morphological features. The log-rank test was used to compare disease-free survival (DFS). Results: Twelve of 24 (50%) apocrine-positive tumor samples were LAR subtype, and12 of 17 (70%) LAR-subtype tumor samples exhibited apocrine differentiation. The other subtypes showed following: BL1, 11/44 (25%); BL2, 0/7 (0%); M, 1/10 (10%); unclassified, 0/8 (0%). The median follow-up time was 22 months. In all populations, 2-year DFS rates were higher in patients with apocrine-positive tumors than in those whose tumors did not exhibit apocrine differentiation (P = .027; 2-year DFS, 85% vs 54%). The LAR subtype was also associated with lower HG, although LAR tumors had a similar prognosis to the other subtypes. In the combined analysis of subtypes and apocrine differentiation, patients with apocrine-positive LAR tumors had a higher 2-year DFS rate than did those with apocrine-negative LAR tumors (P = .044; 2-year DFS, 88% vs. 30%). However, patients with apocrine-positive BL1 tumors had no better DFS than did those with apocrine-negative BL1 tumors (P = .133). TIL levels and the presence of the IM signature were positively associated (P = .01), and apocrine differentiation positivity tended to be negatively associated with TIL level (P = .06). Neither TIL level nor IM signature was associated with survival. Conclusion: Apocrine differentiation was associated with the LAR subtype of TNBC and better prognosis in patients who did not have a pCR. The LAR subtype alone did not predict DFS; however, LAR tumors with apocrine differentiation had a better prognosis than did LAR tumors without apocrine differentiation. Using a combination of morphologic and genomic testing may be helpful in determining the prognosis of patients with apocrine-positive TNBC tumors who have residual disease after NST.
Citation Format: Masuda H, Miura S, Harano K, Wang Y, Hirota Y, Matsunaga Y, Lim B, Lucci A, Parinyanitikul N, Lee HJ, Gong G, Rao A, Seitz RS, Morris SW, Hout DR, Nakamura S, Tripathy D, Harada O, Krishnamurthy S, Ueno NT. Apocrine morphology and LAR molecular subtype predict prognosis of TNBC patients with residual disease after neoadjuvant chemotherapy [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P4-02-05.
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Affiliation(s)
- H Masuda
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
| | - S Miura
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
| | - K Harano
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
| | - Y Wang
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
| | - Y Hirota
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
| | - Y Matsunaga
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
| | - B Lim
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
| | - A Lucci
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
| | - N Parinyanitikul
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
| | - HJ Lee
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
| | - G Gong
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
| | - A Rao
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
| | - RS Seitz
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
| | - SW Morris
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
| | - DR Hout
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
| | - S Nakamura
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
| | - D Tripathy
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
| | - O Harada
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
| | - S Krishnamurthy
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
| | - NT Ueno
- Showa University, Tokyo, Japan; National Cancer Center Hospital East, Chiba, Japan; The University of Texas MD Anderson Cancer Center, Houston; Chulalongkorn University, Bangkok, Thailand; University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Insight Genetics, Inc.,, Nashville, TN; Kameda General Hospital, Kamogawa, Japan
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Iwase T, Harano K, Masuda H, Kida K, Espinosa Fernandez JR, Hess KR, Wang Y, Woodward WA, Layman RM, Dirix L, Van Laere SJ, Bertucci F, Ueno NT. Abstract P5-05-04: Myc as a poor prognostic marker for ER+ inflammatory breast cancer (IBC): Quantitative estrogen receptor (ER) expression analysis and gene expression analysis in ER+ IBC vs non-IBC. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p5-05-04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background
Estrogen receptor-positive (ER+) primary inflammatory breast cancer (IBC) has a poorer prognosis than ER+ primary non-IBC. Our objective was to determine the association between ER positivity and survival outcome in order to elucidate the biological reason that ER+ IBC is more aggressive than non-IBC.
Methods
We retrospectively determined the relationship between ER expression by immunohistochemistry staining and neoadjuvant chemotherapy response as well as survival outcome for 189 patients with ER+ and HER2-negative (HER2-) IBC and 896 case-matched patients with stage III non-IBC seen at MD Anderson Cancer Center between January 1989 and April 2015. We performed gene expression (GE) analysis for 39 patients with ER+/HER2- IBC and 40 patients with non-IBC to detect genes that are specifically overexpressed in IBC. Logistic regression and Cox proportional hazards model were used to determine the predictive and prognostic value of percentages of cells positive for ER and progesterone receptor (PR) among the patients with ER+/HER2- IBC and non-IBC. Recursive partitioning analysis (RPA) was used to determine the optimal cutoff points for ER% and progesterone receptor (PR) % that maximized differences in survival. The identified cutoff points were tested in an external cohort of 192 ER+/HER2- IBC patients from Institut Paoli-Calmettes in France.
Results
The median values for ER% for IBC and non-IBC were 85 (range, 1-100) and 90 (range, 1-100), respectively. The logistic regression model demonstrated a lack of a relationship of ER% with pathological complete response rate to neoadjuvant chemotherapy both in IBC (P=0.29) and non-IBC (P=0.14). Expression of ER was significantly associated with distant disease-free survival (DDFS); hazard ratio (HR), 0.56 [95% CI, 0.37-0.83] per 50% increase in ER%; P<0.05). Also, ER% was significantly associated with overall survival (OS) (HR, 0.40 [95% CI, 0.25-0.63] per 50% increase in ER%; P<0.05). RPA showed that 91.5% and 9.0% were the optimal cutoff points for ER% and PR%, respectively, for DDFS and overall survival in IBC patients. However, the cutoff points could not be validated in the French external cohort. In the GE study, 84 genes were detected as significantly distinguishing ER+ IBC from non-IBC. Among the top 15 canonical pathways shown by IPA, the ERK/MAPK signaling pathway, PDGF pathway, insulin receptor signaling pathway, and IL-7 signaling pathway were associated with the ER signaling pathway. MYC upregulation was observed in three of these four pathways. Indeed, ER+/HER- IBC had significantly higher MYC amplification compared to those with non-IBC (P<0.05) and higher MYC level was associated with poor relapse free survival for IBC (HR, 1.85 [95% CI, 1.05-2.70], P<0.05).
Conclusions
Increased ER positivity was significantly associated with improved survival in ER+/HER- IBC patients. ER+/HER- IBC had several activated pathways with MYC upregulation compared to non-IBC. MYC upregulation was associated with a poor survival outcome for ER+/HER- IBC. The results indicate that MYC is a key gene for understanding the aggressive biological behavior of ER+/HER- IBC.
Citation Format: Iwase T, Harano K, Masuda H, Kida K, Espinosa Fernandez JR, Hess KR, Wang Y, Woodward WA, Layman RM, Dirix L, Van Laere SJ, Bertucci F, Ueno NT. Myc as a poor prognostic marker for ER+ inflammatory breast cancer (IBC): Quantitative estrogen receptor (ER) expression analysis and gene expression analysis in ER+ IBC vs non-IBC [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P5-05-04.
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Affiliation(s)
- T Iwase
- 1.Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center, Houston 2.Section of Translational Breast Cancer Research, The University of Texas, Houston, TX; Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University Hospital, Shinagawa, Tokyo, Japan; The University of Texas MD Anderson Cancer Center, Houston, TX; University of Antwerp, Antwerp, Belgium; Institut Paoli-Calmettes, Marseille, France; Oncology Center, Sint-Augustinus Hospital, Antwerp, Belgium
| | - K Harano
- 1.Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center, Houston 2.Section of Translational Breast Cancer Research, The University of Texas, Houston, TX; Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University Hospital, Shinagawa, Tokyo, Japan; The University of Texas MD Anderson Cancer Center, Houston, TX; University of Antwerp, Antwerp, Belgium; Institut Paoli-Calmettes, Marseille, France; Oncology Center, Sint-Augustinus Hospital, Antwerp, Belgium
| | - H Masuda
- 1.Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center, Houston 2.Section of Translational Breast Cancer Research, The University of Texas, Houston, TX; Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University Hospital, Shinagawa, Tokyo, Japan; The University of Texas MD Anderson Cancer Center, Houston, TX; University of Antwerp, Antwerp, Belgium; Institut Paoli-Calmettes, Marseille, France; Oncology Center, Sint-Augustinus Hospital, Antwerp, Belgium
| | - K Kida
- 1.Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center, Houston 2.Section of Translational Breast Cancer Research, The University of Texas, Houston, TX; Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University Hospital, Shinagawa, Tokyo, Japan; The University of Texas MD Anderson Cancer Center, Houston, TX; University of Antwerp, Antwerp, Belgium; Institut Paoli-Calmettes, Marseille, France; Oncology Center, Sint-Augustinus Hospital, Antwerp, Belgium
| | - JR Espinosa Fernandez
- 1.Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center, Houston 2.Section of Translational Breast Cancer Research, The University of Texas, Houston, TX; Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University Hospital, Shinagawa, Tokyo, Japan; The University of Texas MD Anderson Cancer Center, Houston, TX; University of Antwerp, Antwerp, Belgium; Institut Paoli-Calmettes, Marseille, France; Oncology Center, Sint-Augustinus Hospital, Antwerp, Belgium
| | - KR Hess
- 1.Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center, Houston 2.Section of Translational Breast Cancer Research, The University of Texas, Houston, TX; Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University Hospital, Shinagawa, Tokyo, Japan; The University of Texas MD Anderson Cancer Center, Houston, TX; University of Antwerp, Antwerp, Belgium; Institut Paoli-Calmettes, Marseille, France; Oncology Center, Sint-Augustinus Hospital, Antwerp, Belgium
| | - Y Wang
- 1.Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center, Houston 2.Section of Translational Breast Cancer Research, The University of Texas, Houston, TX; Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University Hospital, Shinagawa, Tokyo, Japan; The University of Texas MD Anderson Cancer Center, Houston, TX; University of Antwerp, Antwerp, Belgium; Institut Paoli-Calmettes, Marseille, France; Oncology Center, Sint-Augustinus Hospital, Antwerp, Belgium
| | - WA Woodward
- 1.Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center, Houston 2.Section of Translational Breast Cancer Research, The University of Texas, Houston, TX; Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University Hospital, Shinagawa, Tokyo, Japan; The University of Texas MD Anderson Cancer Center, Houston, TX; University of Antwerp, Antwerp, Belgium; Institut Paoli-Calmettes, Marseille, France; Oncology Center, Sint-Augustinus Hospital, Antwerp, Belgium
| | - RM Layman
- 1.Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center, Houston 2.Section of Translational Breast Cancer Research, The University of Texas, Houston, TX; Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University Hospital, Shinagawa, Tokyo, Japan; The University of Texas MD Anderson Cancer Center, Houston, TX; University of Antwerp, Antwerp, Belgium; Institut Paoli-Calmettes, Marseille, France; Oncology Center, Sint-Augustinus Hospital, Antwerp, Belgium
| | - L Dirix
- 1.Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center, Houston 2.Section of Translational Breast Cancer Research, The University of Texas, Houston, TX; Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University Hospital, Shinagawa, Tokyo, Japan; The University of Texas MD Anderson Cancer Center, Houston, TX; University of Antwerp, Antwerp, Belgium; Institut Paoli-Calmettes, Marseille, France; Oncology Center, Sint-Augustinus Hospital, Antwerp, Belgium
| | - SJ Van Laere
- 1.Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center, Houston 2.Section of Translational Breast Cancer Research, The University of Texas, Houston, TX; Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University Hospital, Shinagawa, Tokyo, Japan; The University of Texas MD Anderson Cancer Center, Houston, TX; University of Antwerp, Antwerp, Belgium; Institut Paoli-Calmettes, Marseille, France; Oncology Center, Sint-Augustinus Hospital, Antwerp, Belgium
| | - F Bertucci
- 1.Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center, Houston 2.Section of Translational Breast Cancer Research, The University of Texas, Houston, TX; Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University Hospital, Shinagawa, Tokyo, Japan; The University of Texas MD Anderson Cancer Center, Houston, TX; University of Antwerp, Antwerp, Belgium; Institut Paoli-Calmettes, Marseille, France; Oncology Center, Sint-Augustinus Hospital, Antwerp, Belgium
| | - NT Ueno
- 1.Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center, Houston 2.Section of Translational Breast Cancer Research, The University of Texas, Houston, TX; Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Showa University Hospital, Shinagawa, Tokyo, Japan; The University of Texas MD Anderson Cancer Center, Houston, TX; University of Antwerp, Antwerp, Belgium; Institut Paoli-Calmettes, Marseille, France; Oncology Center, Sint-Augustinus Hospital, Antwerp, Belgium
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Takehara K, Yamashita N, Motohashi T, Harano K, Nakanishi T, Tokunaga H, Susumu N, Ueda Y, Yokoyama Y, Watanabe Y, Watanabe R, Teramoto N, Tsuda H, Saito T. Prognostic factors in patients with uterine leiomyosarcoma: A multiinstitutional retrospective study from the Japanese gynecologic oncology group. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy285.172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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43
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Abuillan W, Becker AS, Demé B, Homma T, Isobe H, Harano K, Nakamura E, Tanaka M. Neutron Scattering Reveals Water Confined in a Watertight Bilayer Vesicle. J Am Chem Soc 2018; 140:11261-11266. [DOI: 10.1021/jacs.8b04066] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wasim Abuillan
- Physical Chemistry of Biosystems, Institute of Physical Chemistry, Heidelberg University, D69120 Heidelberg, Germany
| | - Alexandra S. Becker
- Physical Chemistry of Biosystems, Institute of Physical Chemistry, Heidelberg University, D69120 Heidelberg, Germany
| | - Bruno Demé
- Institut Laue−Langevin (ILL), CS20156, 38042 Grenoble, France
| | - Tatsuya Homma
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033 Tokyo, Japan
| | - Hiroyuki Isobe
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033 Tokyo, Japan
| | - Koji Harano
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033 Tokyo, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033 Tokyo, Japan
| | - Motomu Tanaka
- Physical Chemistry of Biosystems, Institute of Physical Chemistry, Heidelberg University, D69120 Heidelberg, Germany
- Center for Integrative Medicine and Physics, Institute for Advanced Study, Kyoto University, 606-8501 Kyoto, Japan
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Minami K, Okamoto K, Harano K, Noiri E, Nakamura E. Hierarchical Assembly of siRNA with Tetraamino Fullerene in Physiological Conditions for Efficient Internalization into Cells and Knockdown. ACS Appl Mater Interfaces 2018; 10:19347-19354. [PMID: 29742343 DOI: 10.1021/acsami.8b01869] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Delivery of siRNA is a key technique in alternative gene therapy, where the siRNA cargo must be effectively loaded onto a tailor-designed carrier molecule and smoothly unloaded precisely upon arrival at the target cells or organs. Any toxicity issues also need to be mitigated by suitable choice of the carrier molecule. A water-soluble cationic fullerene, tetra(piperazino)[60]fullerene epoxide (TPFE), was previously shown to be nontoxic and effective for lung-targeted in vivo siRNA delivery by way of agglutination-induced accumulation. We found in this in vitro study that hierarchical reversible assembly of micrometer-sized TPFE-siRNA-serum protein ternary complexes is the key element for effective loading and release, and stabilization of otherwise highly unstable siRNA under the physiological conditions. The amphiphilic TPFE molecule forms a sub-10 nm-sized stable micelle because of strong cohesion between fullerene molecules, and this fullerene aggregate protects siRNA and induces the hierarchical assembly. Unlike popularly used polyamine carriers, TPFE is not toxic at the dose used for the siRNA delivery.
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Affiliation(s)
- Kosuke Minami
- Department of Chemistry , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan
| | - Koji Okamoto
- Department of Nephrology and Endocrinology, University Hospital , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-8655 , Japan
| | - Koji Harano
- Department of Chemistry , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan
| | - Eisei Noiri
- Department of Nephrology and Endocrinology, University Hospital , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-8655 , Japan
| | - Eiichi Nakamura
- Department of Chemistry , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan
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45
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Sumiya H, Hamaki K, Harano K. Note: Evaluation of microfracture strength of diamond materials using nano-polycrystalline diamond spherical indenter. Rev Sci Instrum 2018; 89:056102. [PMID: 29864810 DOI: 10.1063/1.5023150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Ultra-hard and high-strength spherical indenters with high precision and sphericity were successfully prepared from nanopolycrystalline diamond (NPD) synthesized by direct conversion sintering from graphite under high pressure and high temperature. It was shown that highly accurate and stable microfracture strength tests can be performed on various super-hard diamond materials by using the NPD spherical indenters. It was also verified that this technique enables quantitative evaluation of the strength characteristics of single crystal diamonds and NPDs which have been quite difficult to evaluate.
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Affiliation(s)
- H Sumiya
- Advanced Materials Laboratory, Sumitomo Electric Industries, Ltd., Itami, Hyogo 664-0016, Japan
| | - K Hamaki
- Advanced Materials Laboratory, Sumitomo Electric Industries, Ltd., Itami, Hyogo 664-0016, Japan
| | - K Harano
- Advanced Materials Laboratory, Sumitomo Electric Industries, Ltd., Itami, Hyogo 664-0016, Japan
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46
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Kai S, Maddala SP, Kojima T, Akagi S, Harano K, Nakamura E, Hiraoka S. Flexibility of components alters the self-assembly pathway of Pd 2L 4 coordination cages. Dalton Trans 2018; 47:3258-3263. [PMID: 29442109 DOI: 10.1039/c8dt00112j] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The self-assembly process of a Pd2L4 cage consisting of flexible ditopic ligands and Pd(ii) ions was revealed by QASAP (quantitative analysis of self-assembly process), which enables one to obtain information about the intermediates transiently produced during the self-assembly as the average composition of all the intermediates. It was found that the dominant pathway to the cage is the formation of a submicrometre-sized sheet structure, which was characterized by dynamic light scattering (DLS) and scanning transmission electron microscopy (STEM), followed by the addition of free ditopic ligands to the Pd(ii) centres of the sheet structure to trigger the cage formation. This assembly process is completely different from that of a Pd2L4 cage composed of rigid ditopic ligands, indicating that the flexibility of the components strongly affects the self-assembly process.
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Affiliation(s)
- Shumpei Kai
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan.
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47
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Kono M, Fujii T, Matsuda N, Harano K, Chen H, Wathoo C, Aron JY, Tripathy D, Meric-Bernstam F, Ueno NT. Abstract P1-16-04: Somatic mutations, clinicopathologic characteristics, and survival in patients with untreated breast cancer with bone-only and non-bone sites of first metastasis. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p1-16-04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Bone is the most common site of metastasis of breast cancer, and bone metastasis is associated with a high rate of skeletal-related events, all of which contribute to decreased quality of life and poor outcomes. Biological mechanisms of metastasis to bone may be unique, and identification of distinct signaling pathways and somatic mutations may provide biological insight into or rational targets for treatment of and prevention of bone metastasis. The aims of this study were to compare and contrast somatic mutations, clinicopathologic characteristics, and survival in breast cancer patients with bone only versus non-bone as first metastatic site.
Methods: Tumor samples were collected from 389 patients who had metastasis and untreated primary breast cancer. In each sample, 46 or 50 cancer-related genes were selectively amplified and analyzed for mutations by AmpliSeq Ion Torrent next-generation sequencing. We used Fisher's exact test to identify somatic mutations associated with bone-only first metastasis and logistic regression models to identify differences in clinicopathologic characteristics, survival, and somatic mutations between patients with bone-only first metastasis and patients with first metastasis in non-bone sites only (“other-only first metastasis”).
Results: Among the 389 patients, the first metastasis was located in bone only in 72 patients (18.5%), non-bone sites only in 223 patients (57.3%), and both in 94 patients (24.2%). Of the cancer-related genes analyzed, the most commonly mutated were TP53 (N=103), PIK3CA (N=79), AKT (N=13), and PTEN (N=2). Compared to patients with other-only first metastasis, patients with bone-only first metastasis had higher rates of hormone-receptor-positive disease, non-triple-negative subtype, and low nuclear grade (grade 1 or 2) (all 3 comparisons, p<0.001); had a lower ratio of cases of invasive ductal carcinoma to cases of invasive lobular carcinoma (p=0.002); and tended to have a higher 5-year overall survival (OS) rate (78.2% [95% confidence interval (CI), 68.6%-89.0%] vs 55.0% [95% CI, 48.1%-62.9%]; p=0.051). However, in the subgroup of patients with TP53 mutation and in the subgroup of patients with PIK3CA mutation, OS did not differ between patients with bone-only and other-only first metastasis (p=0.49 and p=0.68; respectively). In univariate analysis, the rate of TP53 mutation tended to be lower in patients with bone-only first metastasis than in those with other-only first metastasis (15.3% vs 29.1%; p=0.051). In multivariate analysis, TP53 mutation was not significantly associated with site of first metastasis (p=0.54) but was significantly associated with hormone-receptor-negative disease (p<0.001).
Conclusions: We did not find associations between somatic mutations and bone-only first metastasis in patients with untreated breast cancer. Patients with bone-only first metastasis have longer OS than patients with other-only first metastasis. More comprehensive molecular analysis may be needed to further understand the factors associated with bone-only metastatic disease in breast cancer.
Citation Format: Kono M, Fujii T, Matsuda N, Harano K, Chen H, Wathoo C, Aron JY, Tripathy D, Meric-Bernstam F, Ueno NT. Somatic mutations, clinicopathologic characteristics, and survival in patients with untreated breast cancer with bone-only and non-bone sites of first metastasis [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P1-16-04.
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Affiliation(s)
- M Kono
- Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Biostatistics, Houston, TX; Sheikh Khalifa Bin Zayed Al Nahyan Institute for Personalized Cancer Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), Houston, TX
| | - T Fujii
- Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Biostatistics, Houston, TX; Sheikh Khalifa Bin Zayed Al Nahyan Institute for Personalized Cancer Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), Houston, TX
| | - N Matsuda
- Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Biostatistics, Houston, TX; Sheikh Khalifa Bin Zayed Al Nahyan Institute for Personalized Cancer Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), Houston, TX
| | - K Harano
- Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Biostatistics, Houston, TX; Sheikh Khalifa Bin Zayed Al Nahyan Institute for Personalized Cancer Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), Houston, TX
| | - H Chen
- Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Biostatistics, Houston, TX; Sheikh Khalifa Bin Zayed Al Nahyan Institute for Personalized Cancer Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), Houston, TX
| | - C Wathoo
- Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Biostatistics, Houston, TX; Sheikh Khalifa Bin Zayed Al Nahyan Institute for Personalized Cancer Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), Houston, TX
| | - JY Aron
- Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Biostatistics, Houston, TX; Sheikh Khalifa Bin Zayed Al Nahyan Institute for Personalized Cancer Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), Houston, TX
| | - D Tripathy
- Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Biostatistics, Houston, TX; Sheikh Khalifa Bin Zayed Al Nahyan Institute for Personalized Cancer Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), Houston, TX
| | - F Meric-Bernstam
- Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Biostatistics, Houston, TX; Sheikh Khalifa Bin Zayed Al Nahyan Institute for Personalized Cancer Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), Houston, TX
| | - NT Ueno
- Section of Translational Breast Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX; The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Biostatistics, Houston, TX; Sheikh Khalifa Bin Zayed Al Nahyan Institute for Personalized Cancer Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX; Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), Houston, TX
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48
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Zhen Y, Inoue K, Wang Z, Kusamoto T, Nakabayashi K, Ohkoshi SI, Hu W, Guo Y, Harano K, Nakamura E. Acid-Responsive Conductive Nanofiber of Tetrabenzoporphyrin Made by Solution Processing. J Am Chem Soc 2018; 140:62-65. [PMID: 29205033 DOI: 10.1021/jacs.7b10575] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
While cofacial one-dimensional (1-D) π stacking of a planar aromatic molecule is ideal for the construction of conduction systems, such molecules, including tetrabenzoporphyrin (BP), prefer to form edge-to-face stacking through CH-π interactions. We report here that the BP molecules spontaneously form a 1-D cofacial stack in chloroform containing 1% trifluoroacetic acid (TFA) and that a bundle of the formed nanofiber shows acid-responsive 1-D conductivity as high as 1904 S m-1. A small fraction (2.7%) of BP in the fiber exists in a cation radical state, and 1.5 equiv of TFA is located in an intercolumnar void. Dedoping and redoping of TFA with trimethylamine vapor results in 1300-2700-fold decreases and increases, respectively, in the conductivity and also the amount of the radical cation. The conductivity of the fiber also shows a correlation with the pKa of acid dopants.
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Affiliation(s)
- Yonggang Zhen
- Beijing National Laboratory for Molecular Science, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China.,Department of Chemistry, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kento Inoue
- Department of Chemistry, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Zongrui Wang
- Beijing National Laboratory for Molecular Science, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Tetsuro Kusamoto
- Department of Chemistry, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Koji Nakabayashi
- Department of Chemistry, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shin-Ichi Ohkoshi
- Department of Chemistry, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Wenping Hu
- Beijing National Laboratory for Molecular Science, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China.,Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, China
| | - Yunlong Guo
- Beijing National Laboratory for Molecular Science, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China.,Department of Chemistry, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Koji Harano
- Department of Chemistry, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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49
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Okada S, Kowashi S, Schweighauser L, Yamanouchi K, Harano K, Nakamura E. Direct Microscopic Analysis of Individual C 60 Dimerization Events: Kinetics and Mechanisms. J Am Chem Soc 2017; 139:18281-18287. [PMID: 29172523 DOI: 10.1021/jacs.7b09776] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Modern transition state theory states that the statistical behavior of a chemical reaction is the sum of individual chemical events that occur randomly. Statistical analysis of each event for individual molecules in a three-dimensional space however is practically impossible. We report here that kinetics and mechanisms of chemical reactions can be investigated by using a one-dimensional system where reaction events can be observed in situ and counted one by one using variable-temperature (VT) atomic-resolution transmission electron microscopy (TEM). We thereby provide direct proof that the ensemble behavior of random events conforms to the Rice-Ramsperger-Kassel-Marcus theory, as illustrated for [2 + 2] cycloaddition of C60 molecules in carbon nanotubes (CNTs). This method gives kinetic and structural information for different types of reactions occurring simultaneously in the microscopic view field, suggesting that the VT-TEM opens a new dimension of chemical kinetics research on molecules and their assemblies in their excited and ionized states. The study carried out at 393-493 K showed that pristine CNT primarily acts as a singlet sensitizer of the cycloaddition reaction that takes place with an activation energy of 33.5 ± 6.8 kJ/mol. On the other hand, CNT suffers electron damage of the conjugated system at 103-203 K and promotes a reactive radical cation path that takes place with an activation energy of only 1.9 ± 0.7 kJ/mol. The pre-exponential factor of the Arrhenius plot gave us further mechanistic insights.
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Affiliation(s)
- Satoshi Okada
- Department of Chemistry, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Satori Kowashi
- Department of Chemistry, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Luca Schweighauser
- Department of Chemistry, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kaoru Yamanouchi
- Department of Chemistry, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Koji Harano
- Department of Chemistry, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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50
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Aoki R, Toyoda R, Kögel JF, Sakamoto R, Kumar J, Kitagawa Y, Harano K, Kawai T, Nishihara H. Bis(dipyrrinato)zinc(II) Complex Chiroptical Wires: Exfoliation into Single Strands and Intensification of Circularly Polarized Luminescence. J Am Chem Soc 2017; 139:16024-16027. [PMID: 29046059 DOI: 10.1021/jacs.7b07077] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
One-dimensional (1D) coordination polymers (CPs) experiences limitations in exfoliation into individual strands, which hamper their utility as functional 1D nanomaterials. Here we synthesize chiral 1D-CPs that feature the bis(dipyrrinato)zinc(II) complex motif. They can be exfoliated into single strands upon sonication in organic media, retaining lengths of up to 3.19 μm (ca. 2600 monomer units). Their chiroptical structure allows the exfoliated wires to show circularly polarized luminescence at an intensity 5.9 times that of reference monomer complexes.
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Affiliation(s)
- Risa Aoki
- Department of Chemistry, Graduate School of Science, The University of Tokyo , 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Ryojun Toyoda
- Department of Chemistry, Graduate School of Science, The University of Tokyo , 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Julius F Kögel
- Institut für Anorganische Chemie, Universität Bremen , Leobener Str., 28359 Bremen, Germany
| | - Ryota Sakamoto
- Department of Chemistry, Graduate School of Science, The University of Tokyo , 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.,JST-PRESTO , 4-1-8, Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Jatish Kumar
- Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST) , 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Yasutaka Kitagawa
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University , Toyonaka, Osaka 560-8531, Japan
| | - Koji Harano
- Department of Chemistry, Graduate School of Science, The University of Tokyo , 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Tsuyoshi Kawai
- Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST) , 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Hiroshi Nishihara
- Department of Chemistry, Graduate School of Science, The University of Tokyo , 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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