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Fujihara H, Naito M, Yashima T, Okada Y, Kobayashi N, Miyagawa S, Takaya H, Tokunaga Y. Synthesis of Cross-Chain Bridging Cryptands and Induction of Molecular Chirality. Org Lett 2023; 25:8959-8964. [PMID: 37871274 DOI: 10.1021/acs.orglett.3c03007] [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: 10/25/2023]
Abstract
In this study, we synthesized two cryptands featuring entangled tri- and tetra(ethylene glycol) linkers. The cryptand bearing short linkers was chiral without any asymmetric carbon atoms. After chiral high-performance liquid chromatography was used to separate the enantiomers, the absolute configuration of each cryptand was determined through single-crystal X-ray and circular dichroism analyses. The racemization of the cryptand possessing long linkers proceeded at room temperature.
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Affiliation(s)
- Hiroki Fujihara
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
| | - Masaya Naito
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
| | - Takafumi Yashima
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
| | - Yusuke Okada
- Faculty of Textile Science and Technology, Shinshu University, Tokida, Ueda, Nagano 386-8567, Japan
| | - Nagao Kobayashi
- Faculty of Textile Science and Technology, Shinshu University, Tokida, Ueda, Nagano 386-8567, Japan
| | - Shinobu Miyagawa
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
| | - Hikaru Takaya
- Department of Life Science, Faculty of Life & Environmental Sciences, Teikyo University of Science, Main Buld #15-05, 2-2-1 Senjyusakuragi, Adachi-ku, Tokyo 120-0045, Japan
- Division of Photo-Molecular Science, Institute for Molecular Science, Myodaiji, Okazaki, Aichi 444-8585, Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
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2
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Tokunaga Y, Sakai H, Kambe S, Opletal P, Tokiwa Y, Haga Y, Kitagawa S, Ishida K, Aoki D, Knebel G, Lapertot G, Krämer S, Horvatić M. Longitudinal Spin Fluctuations Driving Field-Reinforced Superconductivity in UTe_{2}. Phys Rev Lett 2023; 131:226503. [PMID: 38101342 DOI: 10.1103/physrevlett.131.226503] [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] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 09/29/2023] [Accepted: 10/18/2023] [Indexed: 12/17/2023]
Abstract
Our measurements of ^{125}Te NMR relaxations reveal an enhancement of electronic spin fluctuations above μ_{0}H^{*}∼15 T, leading to their divergence in the vicinity of the metamagnetic transition at μ_{0}H_{m}≈35 T, below which field-reinforced superconductivity appears when a magnetic field (H) is applied along the crystallographic b axis. The NMR data evidence that these fluctuations are dominantly longitudinal, providing a key to understanding the peculiar superconducting phase diagram in H∥b, where such fluctuations enhance the pairing interactions.
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Affiliation(s)
- Y Tokunaga
- ASRC, Japan Atomic Energy Agency Tokai, Ibaraki 319-1195, Japan
| | - H Sakai
- ASRC, Japan Atomic Energy Agency Tokai, Ibaraki 319-1195, Japan
| | - S Kambe
- ASRC, Japan Atomic Energy Agency Tokai, Ibaraki 319-1195, Japan
| | - P Opletal
- ASRC, Japan Atomic Energy Agency Tokai, Ibaraki 319-1195, Japan
| | - Y Tokiwa
- ASRC, Japan Atomic Energy Agency Tokai, Ibaraki 319-1195, Japan
| | - Y Haga
- ASRC, Japan Atomic Energy Agency Tokai, Ibaraki 319-1195, Japan
| | - S Kitagawa
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - K Ishida
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - D Aoki
- IMR, Tohoku University, Ibaraki 311-1313, Japan
- Université Grenoble Alpes, CEA, Grenoble-INP, IRIG, Pheliqs, 38000 Grenoble, France
| | - G Knebel
- Université Grenoble Alpes, CEA, Grenoble-INP, IRIG, Pheliqs, 38000 Grenoble, France
| | - G Lapertot
- Université Grenoble Alpes, CEA, Grenoble-INP, IRIG, Pheliqs, 38000 Grenoble, France
| | - S Krämer
- Laboratoire National des Champs Magnétiques Intenses, LNCMI-CNRS (UPR3228), EMFL, Université Grenoble Alpes, UPS and INSA Toulouse, Boîte Postale 166, 38042 Grenoble Cedex 9, France
| | - M Horvatić
- Laboratoire National des Champs Magnétiques Intenses, LNCMI-CNRS (UPR3228), EMFL, Université Grenoble Alpes, UPS and INSA Toulouse, Boîte Postale 166, 38042 Grenoble Cedex 9, France
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3
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Uegaki K, Tokunaga Y, Inoue M, Takashima S, Inaba K, Takeuchi K, Ushioda R, Nagata K. The oxidative folding of nascent polypeptides provides electrons for reductive reactions in the ER. Cell Rep 2023; 42:112742. [PMID: 37421625 DOI: 10.1016/j.celrep.2023.112742] [Citation(s) in RCA: 1] [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: 07/27/2022] [Revised: 03/20/2023] [Accepted: 06/19/2023] [Indexed: 07/10/2023] Open
Abstract
The endoplasmic reticulum (ER) maintains an oxidative redox environment that is advantageous for the oxidative folding of nascent polypeptides entering the ER. Reductive reactions within the ER are also crucial for maintaining ER homeostasis. However, the mechanism by which electrons are supplied for the reductase activity within the ER remains unknown. Here, we identify ER oxidoreductin-1α (Ero1α) as an electron donor for ERdj5, an ER-resident disulfide reductase. During oxidative folding, Ero1α catalyzes disulfide formation in nascent polypeptides through protein disulfide isomerase (PDI) and then transfers the electrons to molecular oxygen via flavin adenine dinucleotide (FAD), ultimately yielding hydrogen peroxide (H2O2). Besides this canonical electron pathway, we reveal that ERdj5 accepts electrons from specific cysteine pairs in Ero1α, demonstrating that the oxidative folding of nascent polypeptides provides electrons for reductive reactions in the ER. Moreover, this electron transfer pathway also contributes to maintaining ER homeostasis by reducing H2O2 production in the ER.
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Affiliation(s)
- Kaiku Uegaki
- Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kyoto 603-8555, Japan
| | - Yuji Tokunaga
- Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology, Tokyo 135-0064, Japan; Graduate School of Pharmaceutical Sciences, the University of Tokyo, Tokyo 113-0033, Japan
| | - Michio Inoue
- Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), Saitama 332-0012, Japan; Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Miyagi 980-8577, Japan
| | - Seiji Takashima
- Department of Medical Biochemistry, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
| | - Kenji Inaba
- Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), Saitama 332-0012, Japan; Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Miyagi 980-8577, Japan
| | - Koh Takeuchi
- Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology, Tokyo 135-0064, Japan; Graduate School of Pharmaceutical Sciences, the University of Tokyo, Tokyo 113-0033, Japan
| | - Ryo Ushioda
- Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kyoto 603-8555, Japan; Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), Saitama 332-0012, Japan; Institute for Protein Dynamics, Kyoto Sangyo University, Kyoto 603-8555, Japan.
| | - Kazuhiro Nagata
- Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kyoto 603-8555, Japan; Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), Saitama 332-0012, Japan; Institute for Protein Dynamics, Kyoto Sangyo University, Kyoto 603-8555, Japan; JT Biohistory Research Hall, Murasaki Town 1-1, Takatsuki City, Osaka 569-1125, Japan.
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4
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Sugiyama JI, Tokunaga Y, Hishida M, Tanaka M, Takeuchi K, Satoh D, Imashimizu M. Nonthermal acceleration of protein hydration by sub-terahertz irradiation. Nat Commun 2023; 14:2825. [PMID: 37217486 DOI: 10.1038/s41467-023-38462-0] [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: 07/02/2022] [Accepted: 04/20/2023] [Indexed: 05/24/2023] Open
Abstract
The collective intermolecular dynamics of protein and water molecules, which overlap in the sub-terahertz (THz) frequency region, are relevant for expressing protein functions but remain largely unknown. This study used dielectric relaxation (DR) measurements to investigate how externally applied sub-THz electromagnetic fields perturb the rapid collective dynamics and influence the considerably slower chemical processes in protein-water systems. We analyzed an aqueous lysozyme solution, whose hydration is not thermally equilibrated. By detecting time-lapse differences in microwave DR, we demonstrated that sub-THz irradiation gradually decreases the dielectric permittivity of the lysozyme solution by reducing the orientational polarization of water molecules. Comprehensive analysis combining THz and nuclear magnetic resonance spectroscopies suggested that the gradual decrease in the dielectric permittivity is not induced by heating but is due to a slow shift toward the hydrophobic hydration structure in lysozyme. Our findings can be used to investigate hydration-mediated protein functions based on sub-THz irradiation.
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Affiliation(s)
- Jun-Ichi Sugiyama
- Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8565, Japan
| | - Yuji Tokunaga
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo, Tokyo, 113-0033, Japan
| | - Mafumi Hishida
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8571, Japan
- Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo, 162-8601, Japan
| | - Masahito Tanaka
- Research Institute for Measurement and Analytical Instrumentation, National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8568, Japan
| | - Koh Takeuchi
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo, Tokyo, 113-0033, Japan
| | - Daisuke Satoh
- Research Institute for Measurement and Analytical Instrumentation, National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8568, Japan
| | - Masahiko Imashimizu
- Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8565, Japan.
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5
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Sakai H, Tokiwa Y, Opletal P, Kimata M, Awaji S, Sasaki T, Aoki D, Kambe S, Tokunaga Y, Haga Y. Field Induced Multiple Superconducting Phases in UTe_{2} along Hard Magnetic Axis. Phys Rev Lett 2023; 130:196002. [PMID: 37243663 DOI: 10.1103/physrevlett.130.196002] [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] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 12/19/2022] [Accepted: 04/04/2023] [Indexed: 05/29/2023]
Abstract
The superconducting (SC) phase diagram in uranium ditelluride is explored under magnetic fields (H) along the hard magnetic b axis using a high-quality single crystal with T_{c}=2.1 K. Simultaneous electrical resistivity and ac magnetic susceptibility measurements discern low- and high-field SC (LFSC and HFSC, respectively) phases with contrasting field-angular dependence. Crystal quality increases the upper critical field of the LFSC phase, but the H^{*} of ∼15 T, at which the HFSC phase appears, is always the same through the various crystals. A phase boundary signature is also observed inside the LFSC phase near H^{*}, indicating an intermediate SC phase characterized by small flux pinning forces.
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Affiliation(s)
- H Sakai
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Y Tokiwa
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - P Opletal
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - M Kimata
- Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan
| | - S Awaji
- High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - T Sasaki
- Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan
| | - D Aoki
- Institute for Materials Research, Tohoku University, Oarai, Ibaraki 311-1313, Japan
| | - S Kambe
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Y Tokunaga
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Y Haga
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
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6
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Mellul M, Lahav S, Imashimizu M, Tokunaga Y, Lukatsky DB, Ram O. Repetitive DNA symmetry elements negatively regulate gene expression in embryonic stem cells. Biophys J 2022; 121:3126-3135. [PMID: 35810331 PMCID: PMC9463640 DOI: 10.1016/j.bpj.2022.07.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 06/13/2022] [Accepted: 07/07/2022] [Indexed: 11/30/2022] Open
Abstract
Transcription factor (TF) binding to genomic DNA elements constitutes one of the key mechanisms that regulates gene expression program in cells. Both consensus and nonconsensus DNA sequence elements influence the recognition specificity of TFs. Based on the analysis of experimentally determined c-Myc binding preferences to genomic DNA, here we statistically predict that certain repetitive, nonconsensus DNA symmetry elements can relatively reduce TF-DNA binding preferences. This is in contrast to a different set of repetitive, nonconsensus symmetry elements that can increase the strength of TF-DNA binding. Using c-Myc enhancer reporter system containing consensus motif flanked by nonconsensus sequences in embryonic stem cells, we directly demonstrate that the enrichment in such negatively regulating repetitive symmetry elements is sufficient to reduce the gene expression level compared with native genomic sequences. Negatively regulating repetitive symmetry elements around consensus c-Myc motif and DNA sequences containing consensus c-Myc motif flanked by entirely randomized sequences show similar expression baseline. A possible explanation for this observation is that rather than complete repression, negatively regulating repetitive symmetry elements play a regulatory role in fine-tuning the reduction of gene expression, most probably by binding TFs other than c-Myc.
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Affiliation(s)
- Meir Mellul
- Department of Biological Chemistry, The Institute of Life Sciences, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem, Israel
| | - Shlomtzion Lahav
- Department of Biological Chemistry, The Institute of Life Sciences, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem, Israel
| | - Masahiko Imashimizu
- Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
| | - Yuji Tokunaga
- Graduate School of Pharmaceutical Sciences, the University of Tokyo, Tokyo, Japan
| | - David B Lukatsky
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
| | - Oren Ram
- Department of Biological Chemistry, The Institute of Life Sciences, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem, Israel.
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7
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Muranaka A, Ban H, Naito M, Miyagawa S, Ueda M, Yamamoto S, Harada M, Takaya H, Kimura M, Kobayashi N, Uchiyama M, Tokunaga Y. Naked-Eye-Detectable Supramolecular Sensing System for Glutaric Acid and Isophthalic Acid. BCSJ 2022. [DOI: 10.1246/bcsj.20220195] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Atsuya Muranaka
- Molecular Structure Characterization Unit, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198 Japan
| | - Hayato Ban
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507 Japan
| | - Masaya Naito
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507 Japan
| | - Shinobu Miyagawa
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507 Japan
| | - Masahiro Ueda
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507 Japan
| | - Shin Yamamoto
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507 Japan
| | - Mei Harada
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 Japan
| | - Hikaru Takaya
- Department of Life Science, Faculty of Life & Environmental Sciences, Teikyo University of Science, Main Buld #15-05, 2-2-1 Senjyusakuragi, Adachi-ku, Tokyo 120-0045 Japan
- Division of Photo-Molecular Science, Institute for Molecular Science, Myodaiji, Okazaki, Aichi, 444-8585 Japan
| | - Masaki Kimura
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507 Japan
| | - Nagao Kobayashi
- Faculty of Textile Science and Technology, Shinshu University, Tokida, Ueda, Nagano 386-8567 Japan
| | - Masanobu Uchiyama
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507 Japan
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Yamaguchi S, Hosaka S, Sugaya K, Tokunaga Y, Yokota S. Monitoring and Predicting the Size of Fine Particles Prepared in a Fluidized-Bed Granulator Using a Handheld-Type Raman Spectrometer. Chem Pharm Bull (Tokyo) 2022; 70:362-368. [DOI: 10.1248/cpb.c21-00958] [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: 11/22/2022]
Affiliation(s)
- Shingo Yamaguchi
- Research and Development Division, Sawai Pharmaceutical Co., Ltd
| | - Shouichi Hosaka
- Research and Development Division, Sawai Pharmaceutical Co., Ltd
| | - Kayo Sugaya
- Research and Development Division, Sawai Pharmaceutical Co., Ltd
| | - Yuji Tokunaga
- Research and Development Division, Sawai Pharmaceutical Co., Ltd
| | - Shouji Yokota
- Research and Development Division, Sawai Pharmaceutical Co., Ltd
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9
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Aoki D, Brison JP, Flouquet J, Ishida K, Knebel G, Tokunaga Y, Yanase Y. Unconventional superconductivity in UTe 2. J Phys Condens Matter 2022; 34:243002. [PMID: 35203074 DOI: 10.1088/1361-648x/ac5863] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 02/24/2022] [Indexed: 06/14/2023]
Abstract
The novel spin-triplet superconductor candidate UTe2was discovered only recently at the end of 2018 and already attracted enormous attention. We review key experimental and theoretical progress which has been achieved in different laboratories. UTe2is a heavy-fermion paramagnet, but following the discovery of superconductivity, it has been expected to be close to a ferromagnetic instability, showing many similarities to the U-based ferromagnetic superconductors, URhGe and UCoGe. This view might be too simplistic. The competition between different types of magnetic interactions and the duality between the local and itinerant character of the 5fUranium electrons, as well as the shift of the U valence appear as key parameters in the rich phase diagrams discovered recently under extreme conditions like low temperature, high magnetic field, and pressure. We discuss macroscopic and microscopic experiments at low temperature to clarify the normal phase properties at ambient pressure for field applied along the three axis of this orthorhombic structure. Special attention will be given to the occurrence of a metamagnetic transition atHm= 35 T for a magnetic field applied along the hard magnetic axisb. Adding external pressure leads to strong changes in the magnetic and electronic properties with a direct feedback on superconductivity. Attention is paid on the possible evolution of the Fermi surface as a function of magnetic field and pressure. Superconductivity in UTe2is extremely rich, exhibiting various unconventional behaviors which will be highlighted. It shows an exceptionally huge superconducting upper critical field with a re-entrant behavior under magnetic field and the occurrence of multiple superconducting phases in the temperature-field-pressure phase diagrams. There is evidence for spin-triplet pairing. Experimental indications exist for chiral superconductivity and spontaneous time reversal symmetry breaking in the superconducting state. Different theoretical approaches will be described. Notably we discuss that UTe2is a possible example for the realization of a fascinating topological superconductor. Exploring superconductivity in UTe2reemphasizes that U-based heavy fermion compounds give unique examples to study and understand the strong interplay between the normal and superconducting properties in strongly correlated electron systems.
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Affiliation(s)
- D Aoki
- IMR, Tohoku University, Oarai, Ibaraki, 311-1313, Japan
| | - J-P Brison
- Univ. Grenoble Alpes, CEA, Grenoble INP, IRIG, PHELIQS, F-38000 Grenoble, France
| | - J Flouquet
- Univ. Grenoble Alpes, CEA, Grenoble INP, IRIG, PHELIQS, F-38000 Grenoble, France
| | - K Ishida
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - G Knebel
- Univ. Grenoble Alpes, CEA, Grenoble INP, IRIG, PHELIQS, F-38000 Grenoble, France
| | - Y Tokunaga
- ASRC, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Y Yanase
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
- Institute for Molecular Science, Okazaki 444-8585, Japan
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10
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Makino A, Ueda M, Uematsu Y, Ohora T, Ohtani T, Miyagawa S, Fujibayashi Y, Okazawa H, Tokunaga Y, Kiyono Y. Development of Low Molecular Weight Ligands for Integrin α<sub>v</sub>β<sub>3</sub>. Chem Pharm Bull (Tokyo) 2022; 70:293-299. [DOI: 10.1248/cpb.c21-01085] [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: 11/22/2022]
Affiliation(s)
- Akira Makino
- Biomedical Imaging Research Center, University of Fukui
| | - Masahiro Ueda
- Graduate School of Engineering, Materials Science and Engineering, University of Fukui
| | - Yoshitaka Uematsu
- Graduate School of Engineering, Materials Science and Engineering, University of Fukui
| | - Takuya Ohora
- Graduate School of Engineering, Materials Science and Engineering, University of Fukui
| | - Takayuki Ohtani
- Graduate School of Engineering, Materials Science and Engineering, University of Fukui
| | - Shinobu Miyagawa
- Graduate School of Engineering, Materials Science and Engineering, University of Fukui
| | | | | | - Yuji Tokunaga
- Research and Education Program for Life Science, University of Fukui
| | - Yasushi Kiyono
- Research and Education Program for Life Science, University of Fukui
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11
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Haga Y, Opletal P, Tokiwa Y, Yamamoto E, Tokunaga Y, Kambe S, Sakai H. Effect of uranium deficiency on normal and superconducting properties in unconventional superconductor UTe 2. J Phys Condens Matter 2022; 34:175601. [PMID: 35120343 DOI: 10.1088/1361-648x/ac5201] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 02/04/2022] [Indexed: 06/14/2023]
Abstract
Single crystals of the unconventional superconductor UTe2have been grown in various conditions which result in different superconducting transition temperature as well as normal state properties. Stoichiometry of the samples has been characterized by the single-crystal x-ray crystallography and electron microprobe analyses. Superconducting samples are nearly stoichiometric within an experimental error of about 1%, while non-superconducting sample significantly deviates from the ideal composition. The superconducting UTe2showed that the large density of states was partially gapped in the normal state, while the non-superconducting sample is characterized by the relatively large electronic specific heat as reported previously.
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Affiliation(s)
- Y Haga
- Advanced Science Research Center, Japan Atomic Energy Agency, Japan
| | - P Opletal
- Advanced Science Research Center, Japan Atomic Energy Agency, Japan
| | - Y Tokiwa
- Advanced Science Research Center, Japan Atomic Energy Agency, Japan
| | - E Yamamoto
- Advanced Science Research Center, Japan Atomic Energy Agency, Japan
| | - Y Tokunaga
- Advanced Science Research Center, Japan Atomic Energy Agency, Japan
| | - S Kambe
- Advanced Science Research Center, Japan Atomic Energy Agency, Japan
| | - H Sakai
- Advanced Science Research Center, Japan Atomic Energy Agency, Japan
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12
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Ueda M, Kimura M, Miyagawa S, Naito M, Takaya H, Tokunaga Y. Four- and two-armed hetero porphyrin dimers: their specific recognition and self-sorting behaviours. Org Biomol Chem 2022; 20:387-395. [PMID: 34908079 DOI: 10.1039/d1ob01694f] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In this study we self-assembled the four-armed porphyrin hetero dimer capsule Cap4, stabilized through amidinium-carboxylate salt bridges, in CH2Cl2 and CHCl3. The dimer capsule Cap4 was kinetically and thermodynamically more stable than the corresponding two-armed dimer Cap2. The number of arms strongly influenced their recognition behaviour; guests possessing small aromatic faces (e.g., 1,3,5-trinitrobenzene) preferred residing in the cavity of the two-armed capsule Cap2, rather than in Cap4, both thermodynamically and kinetically; in contrast, large aromatic guests (e.g., 9,10-dibromoanthracene) were encapsulated predominantly by Cap4 because of favourable entropic effects. The number of arms enabled self-sorting behaviour of the dimer formation; complexation studies using an equimolar mixture of the four porphyrin constituents of the two capsules revealed the quantitative formation of the corresponding dimers Cap2 and Cap4. Furthermore, we examined the specific molecular recognition of Cap2 and Cap4; NMR experiments of mixtures of Cap2 and Cap4 in the presence of favourable guests for Cap2 and Cap4 revealed that these guest molecules were encapsulated selectively by their preferred hosts.
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Affiliation(s)
- Masahiro Ueda
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan.
| | - Masaki Kimura
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan.
| | - Shinobu Miyagawa
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan.
| | - Masaya Naito
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan.
| | - Hikaru Takaya
- International Research Centre for Elements Science, Institute for Chemical Research, Kyoto University, Uji 611-0011, Japan.,Institute for Molecular Science, National Institute of Natural Science, Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan.
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13
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Nishioka S, Matsushita T, Yamanouchi A, Okazaki Y, Oishi K, Nishioka E, Mori N, Tokunaga Y, Onizuka S. Prevalence and potential determinants of malnutrition-sarcopenia coexistence in geriatric rehabilitation: a cross-sectional analysis using the global leadership initiative on malnutrition criteria and the Asian working group for sarcopenia criteria. Clin Nutr ESPEN 2021. [DOI: 10.1016/j.clnesp.2021.09.183] [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: 10/19/2022]
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14
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Abstract
Many achiral organic compounds become chiral by an isotopic substitution of one of the enantiotopic moieties in their structures. Although spectroscopic methods can recognize the molecular chirality due to an isotopic substitution, the effects of isotopically chiral compounds in enantioselective reactions have remained unsolved because the small chirality arises only from the difference between the number of neutrons in the atomic nuclei. The difference between the diastereomeric isotopomers of reactive sources should be the key to these effects. However, the energy difference between them is difficult to calculate, even using present computational methods, and differences in physical properties have not yet been reported. Here, we demonstrate that the small energy difference between the diastereomeric isotopomers at the molecular level can be enhanced to appear as a solubility difference between the diastereomeric (2H/1H) isotopomers of α-aminonitriles, synthesized from an isotopically chiral amine, achiral aldehyde, and HCN. This small, but measurable, difference induces the chiral (d/l) imbalance in the suspended α-aminonitrile; therefore, a second enhancement in the solid-state chirality proceeds to afford a highly stereoimproved aminonitrile (>99% selectivity) whose handedness arises completely from the excess enantiomer of isotopically chiral amine, even in a low enantiomeric excess and low deuterium-labeling ratio. Because α-aminonitriles can be hydrolyzed to chiral α-amino acids with the removal of an isotope-labeling moiety, the current sequence of reactions represents a highly enantioselective Strecker amino acid synthesis induced by the chiral hydrogen (2H/1H) isotopomer. Thus, hydrogen isotopic chirality links directly with the homochirality of α-amino acids via a double enhancement of α-aminonitrile, the chiral intermediate of a proposed prebiotic mechanism.
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Affiliation(s)
- Tsuneomi Kawasaki
- Department of Applied Chemistry, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Hiroki Kubo
- Department of Applied Chemistry, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Satoshi Nishiyama
- Department of Materials Science and Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
| | - Taiki Saijo
- Department of Applied Chemistry, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Rintaro Yokoi
- Department of Applied Chemistry, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
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15
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Tajima S, Muranaka A, Naito M, Taniguch N, Harada M, Miyagawa S, Ueda M, Takaya H, Kobayashi N, Uchiyama M, Tokunaga Y. Synthesis of a Mechanically Planar Chiral and Axially Chiral [2]Rotaxane. Org Lett 2021; 23:8678-8682. [PMID: 34730985 DOI: 10.1021/acs.orglett.1c02983] [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: 11/28/2022]
Abstract
In this study, we synthesized a [2]rotaxane that was both mechanically planar chiral and axially chiral, comprising a symmetrical bis-crown ether featuring a biphenyl moiety (as the macrocyclic component) and a symmetrical bis-ammonium salt (as the dumbbell-shaped component).
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Affiliation(s)
- Shinya Tajima
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
| | - Atsuya Muranaka
- Molecular Structure Characterization Unit, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Masaya Naito
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
| | - Noriho Taniguch
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
| | - Mei Harada
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shinobu Miyagawa
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
| | - Masahiro Ueda
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
| | - Hikaru Takaya
- International Research Center for Elements Science, Institute for Chemical Research, Kyoto University, Uji 611-0011, Japan.,Institute for Molecular Science, National Institute of Natural Science, Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan
| | - Nagao Kobayashi
- Faculty of Textile Science and Technology, Shinshu University, Tokida, Ueda, Nagano 386-8567, Japan
| | - Masanobu Uchiyama
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
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16
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Vít J, Viirok J, Peedu L, Rõõm T, Nagel U, Kocsis V, Tokunaga Y, Taguchi Y, Tokura Y, Kézsmárki I, Balla P, Penc K, Romhányi J, Bordács S. In Situ Electric-Field Control of THz Nonreciprocal Directional Dichroism in the Multiferroic Ba_{2}CoGe_{2}O_{7}. Phys Rev Lett 2021; 127:157201. [PMID: 34678006 DOI: 10.1103/physrevlett.127.157201] [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] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 07/28/2021] [Indexed: 06/13/2023]
Abstract
Nonreciprocal directional dichroism, also called the optical-diode effect, is an appealing functional property inherent to the large class of noncentrosymmetric magnets. However, the in situ electric control of this phenomenon is challenging as it requires a set of conditions to be fulfilled: Special symmetries of the magnetic ground state, spin excitations with comparable magnetic- and electric-dipole activity, and switchable electric polarization. We demonstrate the isothermal electric switch between domains of Ba_{2}CoGe_{2}O_{7} possessing opposite magnetoelectric susceptibilities. Combining THz spectroscopy and multiboson spin-wave analysis, we show that unbalancing the population of antiferromagnetic domains generates the nonreciprocal light absorption of spin excitations.
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Affiliation(s)
- J Vít
- Department of Physics, Budapest University of Technology and Economics, 1111 Budapest, Hungary
- Institute of Physics ASCR, Na Slovance 2, 182 21 Prague 8, Czech Republic
- Faculty of Nuclear Science and Physical Engineering, Czech Technical University, Břehová 7, 115 19 Prague 1, Czech Republic
| | - J Viirok
- National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia
| | - L Peedu
- National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia
| | - T Rõõm
- National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia
| | - U Nagel
- National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia
| | - V Kocsis
- RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
| | - Y Tokunaga
- RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
- Department of Advanced Materials Science, University of Tokyo, Kashiwa 277-8561, Japan
| | - Y Taguchi
- RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
| | - Y Tokura
- RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
- Department of Applied Physics and Tokyo College, University of Tokyo, Tokyo 113-8656, Japan
| | - I Kézsmárki
- Department of Physics, Budapest University of Technology and Economics, 1111 Budapest, Hungary
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86135 Augsburg, Germany
| | - P Balla
- Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, P.O. Box. 49, H-1525 Budapest, Hungary
| | - K Penc
- Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, P.O. Box. 49, H-1525 Budapest, Hungary
| | - J Romhányi
- Department of Physics and Astronomy, University of California, Irvine, 4129 Frederick Reines Hall, Irvine, California 92697, USA
| | - S Bordács
- Department of Physics, Budapest University of Technology and Economics, 1111 Budapest, Hungary
- Hungarian Academy of Sciences, Premium Postdoctor Program, 1051 Budapest, Hungary
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17
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Matsui K, Nakagawa T, Okumura T, Yamane M, Tokunaga Y, Yokota S. Potential pharmacokinetic interaction between orally administered drug and osmotically active excipients in pediatric polypharmacy. Eur J Pharm Sci 2021; 165:105934. [PMID: 34256099 DOI: 10.1016/j.ejps.2021.105934] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 07/05/2021] [Accepted: 07/06/2021] [Indexed: 12/17/2022]
Abstract
Poorly absorbable sugar alcohols (e.g., mannitol, sorbitol, and maltitol) are the excipients frequently contained in pediatric dosage forms. Due to their osmotically active properties, certain amount of sugar alcohols reportedly reduces oral bioavailability of concomitant drugs. This fact implies the possible pharmacokinetic interaction between orally administered drug and sugar alcohols which are present in other concomitant medications. The purpose of this study was to identify the possibility and likeliness of the osmotically active excipient-induced pharmacokinetic interaction in pediatric polypharmacy. Previously developed in silico model that captured the osmotic effect of sugar alcohols in adults was expanded to pediatric population. This mathematical model successfully explained the impaired bioavailability of lamivudine by the co-administered sorbitol in other dosage forms. In the meantime, sugar alcohol contents in marketed pediatric dosage forms were investigated by reverse engineering technology. Considering the critical administration dose of sugar alcohols estimated by in silico model, it was revealed that 25 out of 153 pediatric dosage forms were identified as possible perpetrators even under the approved administration and dosage in Japan. This study shed light on the potential pharmacokinetic interaction that cannot be dismissed throughout the pediatric pharmaceutical dosage form design and development.
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Affiliation(s)
- Kazuki Matsui
- Pharmacokinetics Group, Biological Research Department, Research & Development Division, Sawai Pharmaceutical Co. Ltd., Osaka, Japan.
| | - Tomoya Nakagawa
- Formulation Ⅳ Group, Pharmaceutical Development Department, Research & Development Division, Sawai Pharmaceutical Co. Ltd
| | - Tomonori Okumura
- Planning Group, New Product Planning Department, Research & Development Division, Sawai Pharmaceutical Co. Ltd
| | - Miki Yamane
- Pharmacokinetics Group, Biological Research Department, Research & Development Division, Sawai Pharmaceutical Co. Ltd., Osaka, Japan
| | - Yuji Tokunaga
- Research & Development Division, Sawai Pharmaceutical Co. Ltd
| | - Shoji Yokota
- Research & Development Division, Sawai Pharmaceutical Co. Ltd
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18
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Tokunaga Y, Tanaka M, Iida H, Kinoshita M, Tojima Y, Takeuchi K, Imashimizu M. Nonthermal excitation effects mediated by sub-terahertz radiation on hydrogen exchange in ubiquitin. Biophys J 2021; 120:2386-2393. [PMID: 33894216 PMCID: PMC8390810 DOI: 10.1016/j.bpj.2021.04.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 03/23/2021] [Accepted: 04/16/2021] [Indexed: 11/28/2022] Open
Abstract
Water dynamics in the hydration layers of biomolecules play crucial roles in a wide range of biological functions. A hydrated protein contains multiple components of diffusional and vibrational dynamics of water and protein, which may be coupled at ∼0.1-THz frequency (10-ps timescale) at room temperature. However, the microscopic description of biomolecular functions based on various modes of protein-water-coupled motions remains elusive. A novel approach for perturbing the hydration dynamics in the subterahertz frequency range and probing them at the atomic level is therefore warranted. In this study, we investigated the effect of klystron-based, intense 0.1-THz excitation on the slow dynamics of ubiquitin using NMR-based measurements of hydrogen-deuterium exchange. We demonstrated that the subterahertz irradiation accelerated the hydrogen-deuterium exchange of the amides located in the interior of the protein and hydrophobic surfaces while decelerating this exchange in the amides located in the surface loop and short 310 helix regions. This subterahertz-radiation-induced effect was qualitatively contradictory to the increased-temperature-induced effect. Our results suggest that the heterogeneous water dynamics occurring at the protein-water interface include components that are nonthermally excited by the subterahertz radiation. Such subterahertz-excited components may be linked to the slow function-related dynamics of the protein.
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Affiliation(s)
- Yuji Tokunaga
- Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology, Tokyo, Japan
| | - Masahito Tanaka
- Research Institute for Measurement and Analytical Instrumentation, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
| | - Hitoshi Iida
- Research Institute for Physical Measurement, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
| | - Moto Kinoshita
- Research Institute for Physical Measurement, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
| | - Yuya Tojima
- Research Institute for Physical Measurement, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
| | - Koh Takeuchi
- Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology, Tokyo, Japan
| | - Masahiko Imashimizu
- Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology, Tokyo, Japan.
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19
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Morise T, Muranaka A, Ban H, Harada M, Naito M, Yoshida K, Kobayashi N, Uchiyama M, Tokunaga Y. A Chiral [3]Rotaxane Comprising Achiral Bis-macrocyclic and Dumbbell-Shaped Components. Org Lett 2021; 23:2120-2124. [PMID: 33689384 DOI: 10.1021/acs.orglett.1c00271] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
In this study, we synthesized a molecularly chiral [3]rotaxane comprising a calix-bis-crown ether (as the macrocyclic component) and two unsymmetrical dialkylammonium salts (as dumbbell-shaped components) without any chirality in any of the individual components. Chiral high-performance liquid chromatography was used to separate the enantiomers, which were characterized by circular dichroism spectroscopy. Density functional theory calculations gave an insight into the absolute configuration of each [3]rotaxane.
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Affiliation(s)
- Takaaki Morise
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
| | - Atsuya Muranaka
- Elements Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Hayato Ban
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
| | - Mei Harada
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masaya Naito
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
| | - Kazuyuki Yoshida
- Forensic Science Laboratory, Fukui Prefectural Police Headquarters, Ohte, Fukui 910-8515, Japan
| | - Nagao Kobayashi
- Faculty of Textile Science and Technology, Shinshu University, Tokida, Ueda, Nagano 386-8567, Japan
| | - Masanobu Uchiyama
- Elements Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.,Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
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20
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Takeuchi K, Misaki I, Tokunaga Y, Fujisaki M, Kamoshida H, Takizawa T, Hanzawa H, Shimada I. Conformational Plasticity of Cyclic Ras‐Inhibitor Peptides Defines Cell Permeabilization Activity. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016647] [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: 11/10/2022]
Affiliation(s)
- Koh Takeuchi
- Cellular and Molecular Biotechnology Research Institute National Institute of Advanced Industrial Science and Technology 2-3-26 Aomi, Koto Tokyo 135-0063 Japan
| | - Imai Misaki
- Japan Biological Informatics Consortium 2-3-26 Aomi, Koto Tokyo 135-0063 Japan
| | - Yuji Tokunaga
- Cellular and Molecular Biotechnology Research Institute National Institute of Advanced Industrial Science and Technology 2-3-26 Aomi, Koto Tokyo 135-0063 Japan
| | - Miwa Fujisaki
- Japan Biological Informatics Consortium 2-3-26 Aomi, Koto Tokyo 135-0063 Japan
| | - Hajime Kamoshida
- Japan Biological Informatics Consortium 2-3-26 Aomi, Koto Tokyo 135-0063 Japan
| | - Takeshi Takizawa
- Biological Research Department Daiichi Sankyo RD Novare Co., Ltd. 1-16-13 Kitakasai, Edogawa-ku Tokyo 134-8630 Japan
| | - Hiroyuki Hanzawa
- Biological Research Department Daiichi Sankyo RD Novare Co., Ltd. 1-16-13 Kitakasai, Edogawa-ku Tokyo 134-8630 Japan
| | - Ichio Shimada
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan
- Center for Biosystems Dynamics Research RIKEN 1-7-22 Suehiro-cho, Tsurumi-ku Yokohama 230-0045 Japan
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21
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Takeuchi K, Misaki I, Tokunaga Y, Fujisaki M, Kamoshida H, Takizawa T, Hanzawa H, Shimada I. Conformational Plasticity of Cyclic Ras‐Inhibitor Peptides Defines Cell Permeabilization Activity. Angew Chem Int Ed Engl 2021; 60:6567-6572. [DOI: 10.1002/anie.202016647] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 01/08/2021] [Indexed: 01/05/2023]
Affiliation(s)
- Koh Takeuchi
- Cellular and Molecular Biotechnology Research Institute National Institute of Advanced Industrial Science and Technology 2-3-26 Aomi, Koto Tokyo 135-0063 Japan
| | - Imai Misaki
- Japan Biological Informatics Consortium 2-3-26 Aomi, Koto Tokyo 135-0063 Japan
| | - Yuji Tokunaga
- Cellular and Molecular Biotechnology Research Institute National Institute of Advanced Industrial Science and Technology 2-3-26 Aomi, Koto Tokyo 135-0063 Japan
| | - Miwa Fujisaki
- Japan Biological Informatics Consortium 2-3-26 Aomi, Koto Tokyo 135-0063 Japan
| | - Hajime Kamoshida
- Japan Biological Informatics Consortium 2-3-26 Aomi, Koto Tokyo 135-0063 Japan
| | - Takeshi Takizawa
- Biological Research Department Daiichi Sankyo RD Novare Co., Ltd. 1-16-13 Kitakasai, Edogawa-ku Tokyo 134-8630 Japan
| | - Hiroyuki Hanzawa
- Biological Research Department Daiichi Sankyo RD Novare Co., Ltd. 1-16-13 Kitakasai, Edogawa-ku Tokyo 134-8630 Japan
| | - Ichio Shimada
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan
- Center for Biosystems Dynamics Research RIKEN 1-7-22 Suehiro-cho, Tsurumi-ku Yokohama 230-0045 Japan
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22
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Iwamoto T, Miyagawa S, Naito M, Tokunaga Y. Orientation of the α-CD component of [2]rotaxanes affects their specific molecular recognition behaviour. Org Chem Front 2021. [DOI: 10.1039/d0qo01337d] [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: 11/21/2022]
Abstract
An α-CD component enhanced the anion recognition ability of the urea moiety and the deprotonation of the phenol moiety in the axle component in orientationally isomeric [2]rotaxanes with the OH groups on the wide rim of the α-CD, respectively.
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Affiliation(s)
- Takuya Iwamoto
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Bunkyo
- Japan
| | - Shinobu Miyagawa
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Bunkyo
- Japan
| | - Masaya Naito
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Bunkyo
- Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Bunkyo
- Japan
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23
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Taniguchi N, Naito M, Miyagawa S, Tokunaga Y. Base-induced multi-state fluorescence of a trefoil-shaped salicylaldehyde azine derivative. RSC Adv 2021; 11:24022-24026. [PMID: 35479037 PMCID: PMC9036653 DOI: 10.1039/d1ra02627e] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Accepted: 06/26/2021] [Indexed: 11/21/2022] Open
Abstract
Base-induced four-state fluorescence is demonstrated in a trefoil-shaped salicylaldehyde azine derivative bearing multiple acidic protons.
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Affiliation(s)
- Noriho Taniguchi
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - Masaya Naito
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - Shinobu Miyagawa
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
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24
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Kimura T, Miyagawa S, Takaya H, Naito M, Tokunaga Y. Locking the Dynamic Axial Chirality of Biphenyl Crown Ethers through Threading. Chem Asian J 2020; 15:3897-3903. [PMID: 33026146 DOI: 10.1002/asia.202001046] [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: 09/02/2020] [Revised: 09/26/2020] [Indexed: 12/17/2022]
Abstract
This paper describes the syntheses of [2]rotaxanes comprising 23- and 26-membered biphenyl crown ethers as the macrocyclic components and secondary ammonium ions as the dumbbell-shaped components, and the locking of the dynamic axial chirality of the biphenyl moieties in these structures. Chiral high-performance liquid chromatography (HPLC) revealed that our [2]rotaxane featuring the 26-membered crown ether racemized at room temperature, but the racemization of the [2]rotaxane featuring the 23-membered crown ether did not proceed at room temperature over a period of three days. After separation of the enantiomers of the [2]rotaxane incorporating the 23-membered crown ether through chiral HPLC, we studied its racemization at elevated temperature. The rate of stereoinversion in dimethylsulfoxide (a polar solvent) was faster than that in o-dichlorobenzene (a nonpolar solvent), and herein we discuss these kinetic parameters.
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Affiliation(s)
- Tomoya Kimura
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui, 910-8507, Japan
| | - Shinobu Miyagawa
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui, 910-8507, Japan
| | - Hikaru Takaya
- International Research Center for Elements Science, Institute for Chemical Research, Kyoto University, Uji, 611-0011, Japan.,Institute for Molecular Science, National Institute of Natural Science, Okazaki, 444-8585, Japan
| | - Masaya Naito
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui, 910-8507, Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui, 910-8507, Japan
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25
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Miyagawa S, Kimura M, Kagami S, Kawasaki T, Tokunaga Y. Utilization of a Crown Ether/Amine-Type Rotaxane as a Probe for the Versatile Detection of Anions and Acids by Thin-Layer Chromatography. Chem Asian J 2020; 15:3044-3049. [PMID: 32783335 DOI: 10.1002/asia.202000746] [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: 06/27/2020] [Revised: 07/31/2020] [Indexed: 11/05/2022]
Abstract
A crown ether/amine-type [2]rotaxane was synthesized and utilized as a probe for the detection of acids and anions. The addition of acids to the amine-type [2]rotaxane solution generated corresponding crown ether/ammonium-type [2]rotaxanes, which were purified by silica gel column chromatography as ammonium salts. The isolated yields of the [2]rotaxanes, possessing a variety of anions, depended on the acidity and polarity of the counter anions. The behaviours of the ammonium-type [2]rotaxanes on thin-layer chromatography (TLC) silica gel reflected the properties of the counter anions. The treatment of the amine-type [2]rotaxane with acids afforded the corresponding ammonium-type [2]rotaxanes bearing several different anions. The ammonium-type [2]rotaxanes behaved similarly to the purified [2]rotaxanes on the TLC silica gel. Furthermore, we succeeded in the analysis of anions using mixtures of the amine-type [2]rotaxane and salts in an appropriate solvent. We demonstrated the detection of anions by the combination of TLC and the utilization of the [2]rotaxane probe.
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Affiliation(s)
- Shinobu Miyagawa
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui, 910-8507, Japan
| | - Masaki Kimura
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui, 910-8507, Japan
| | - Shin Kagami
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui, 910-8507, Japan
| | - Tsuneomi Kawasaki
- Department of Applied Chemistry, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, Bunkyo, Fukui, 910-8507, Japan.,Research and Education Center for Regional Environment, University of Fukui, Bunkyo, Fukui, 910-8507, Japan
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26
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Imashimizu M, Tokunaga Y, Afek A, Takahashi H, Shimamoto N, Lukatsky DB. Control of Transcription Initiation by Biased Thermal Fluctuations on Repetitive Genomic Sequences. Biomolecules 2020; 10:biom10091299. [PMID: 32916947 PMCID: PMC7564750 DOI: 10.3390/biom10091299] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 08/23/2020] [Accepted: 09/04/2020] [Indexed: 12/12/2022] Open
Abstract
In the process of transcription initiation by RNA polymerase, promoter DNA sequences affect multiple reaction pathways determining the productivity of transcription. However, the question of how the molecular mechanism of transcription initiation depends on the sequence properties of promoter DNA remains poorly understood. Here, combining the statistical mechanical approach with high-throughput sequencing results, we characterize abortive transcription and pausing during transcription initiation by Escherichia coli RNA polymerase at a genome-wide level. Our results suggest that initially transcribed sequences, when enriched with thymine bases, contain the signal for inducing abortive transcription, whereas certain repetitive sequence elements embedded in promoter regions constitute the signal for inducing pausing. Both signals decrease the productivity of transcription initiation. Based on solution NMR and in vitro transcription measurements, we suggest that repetitive sequence elements within the promoter DNA modulate the nonlocal base pair stability of its double-stranded form. This stability profoundly influences the reaction coordinates of the productive initiation via pausing.
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Affiliation(s)
- Masahiko Imashimizu
- Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology, Tokyo 135-0064, Japan;
- Correspondence: (M.I.); (D.B.L.); Tel.: +81-3-3599-8232 (M.I.); +972-8642-8370 (D.B.L.)
| | - Yuji Tokunaga
- Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology, Tokyo 135-0064, Japan;
| | - Ariel Afek
- Center for Genomic and Computational Biology, Department of Biostatistics and Bioinformatics, Duke University, Durham, NC 27708, USA;
| | - Hiroki Takahashi
- Medical Mycology Research Center, Chiba University, Chiba 260-8673, Japan;
- Molecular Chirality Research Center, Chiba University, Chiba 263-8522, Japan
- Plant Molecular Science Center, Chiba University, Chiba 260-8675, Japan
| | - Nobuo Shimamoto
- National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan;
| | - David B. Lukatsky
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
- Correspondence: (M.I.); (D.B.L.); Tel.: +81-3-3599-8232 (M.I.); +972-8642-8370 (D.B.L.)
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27
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Mizukoshi Y, Takeuchi K, Tokunaga Y, Matsuo H, Imai M, Fujisaki M, Kamoshida H, Takizawa T, Hanzawa H, Shimada I. Targeting the cryptic sites: NMR-based strategy to improve protein druggability by controlling the conformational equilibrium. Sci Adv 2020; 6:eabd0480. [PMID: 32998885 PMCID: PMC7527212 DOI: 10.1126/sciadv.abd0480] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 08/06/2020] [Indexed: 06/11/2023]
Abstract
Cryptic ligand binding sites, which are not evident in the unligated structures, are beneficial in tackling with difficult but attractive drug targets, such as protein-protein interactions (PPIs). However, cryptic sites have thus far not been rationally pursued in the early stages of drug development. Here, we demonstrated by nuclear magnetic resonance that the cryptic site in Bcl-xL exists in a conformational equilibrium between the open and closed conformations under the unligated condition. While the fraction of the open conformation in the unligated wild-type Bcl-xL is estimated to be low, F143W mutation that is distal from the ligand binding site can substantially elevate the population. The F143W mutant showed a higher hit rate in a phage-display peptide screening, and the hit peptide bound to the cryptic site of the wild-type Bcl-xL. Therefore, by controlling the conformational equilibrium in the cryptic site, the opportunity to identify a PPI inhibitor could be improved.
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Affiliation(s)
| | - Koh Takeuchi
- National Institute of Advanced Industrial Science and Technology (AIST), Molecular Profiling Research Center for Drug Discovery (molprof) and Cellular and Molecular Biotechnology Research Institute, Tokyo 135-0063, Japan.
| | - Yuji Tokunaga
- National Institute of Advanced Industrial Science and Technology (AIST), Molecular Profiling Research Center for Drug Discovery (molprof) and Cellular and Molecular Biotechnology Research Institute, Tokyo 135-0063, Japan
| | - Hitomi Matsuo
- Japan Biological Informatics Consortium, Tokyo 135-0063, Japan
| | - Misaki Imai
- Japan Biological Informatics Consortium, Tokyo 135-0063, Japan
| | - Miwa Fujisaki
- Japan Biological Informatics Consortium, Tokyo 135-0063, Japan
| | | | | | | | - Ichio Shimada
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan.
- RIKEN, Center for Biosystems Dynamics Research, Yokohama 230-0045, Japan
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28
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Ueda M, Kimura M, Miyagawa S, Takaya H, Naito M, Tokunaga Y. A Five-layer π-Aromatic Structure Formed through Self-assembly of a Porphyrin Trimer and Two Aromatic Guests. Chem Asian J 2020; 15:2212-2217. [PMID: 32483880 DOI: 10.1002/asia.202000452] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 05/19/2020] [Indexed: 11/09/2022]
Abstract
In this study we synthesized two- and four-armed porphyrins - bearing two carboxyl and four 2-aminoquinolino functionalities, respectively, at their meso positions - as a complementary hydrogen bonding pair for the self-assembly of a D2 -symmetric porphyrin trimer host. Two units of the two-armed porphyrin and one unit of the four-armed porphyrin self-assembled quantitatively into the D2 -symmetric porphyrin trimer, stabilized through ammidinium-carboxylate salt bridge formation, in CH2 Cl2 and CHCl3 . The porphyrin trimer host gradually bound two units of 1,3,5-trinitrobenzene between the pair of porphyrin units, forming a five-layer aromatic structure. At temperatures below -40 °C, the rates of association and dissociation of the complexes were slow on the NMR spectroscopic time scale, allowing the 1 : 1 and 1 : 2 complexes of the trimer host and trinitrobenzene guest(s) to be detected independently when using less than 2 eq of trinitrobenzene. Vis titration experiments revealed the values of K1 (2.1±0.4×105 M-1 ) and K2 (2.2±0.06×104 M-1 ) in CHCl3 at room temperature.
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Affiliation(s)
- Masahiro Ueda
- Department of Materials Science and Engineering Faculty of Engineering, University of Fukui Bunkyo, Fukui, 910-8507, Japan
| | - Masaki Kimura
- Department of Materials Science and Engineering Faculty of Engineering, University of Fukui Bunkyo, Fukui, 910-8507, Japan
| | - Shinobu Miyagawa
- Department of Materials Science and Engineering Faculty of Engineering, University of Fukui Bunkyo, Fukui, 910-8507, Japan
| | - Hikaru Takaya
- International Research Center for Elements Science Institute for Chemical Research, Kyoto University, Uji, 611-0011, Japan
| | - Masaya Naito
- Department of Materials Science and Engineering Faculty of Engineering, University of Fukui Bunkyo, Fukui, 910-8507, Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering Faculty of Engineering, University of Fukui Bunkyo, Fukui, 910-8507, Japan
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29
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Yamane M, Matsui K, Sugihara M, Tokunaga Y. The Provisional No-Effect Threshold of Sugar Alcohols on Oral Drug Absorption Estimated by Physiologically Based Biopharmaceutics Model. J Pharm Sci 2020; 110:467-477. [PMID: 32470348 DOI: 10.1016/j.xphs.2020.05.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 04/26/2020] [Accepted: 05/15/2020] [Indexed: 01/02/2023]
Abstract
Sugar alcohols reduce oral drug bioavailability by osmotic effects, but the magnitude of these effects differs among different drugs. This study aimed to identify the drug-related critical attributes of osmotic effects and estimate the impact of a "practical" sugar alcohol dose on the pharmacokinetics of various molecules using modeling and simulation approaches. We developed a physiologically based biopharmaceutics model that considers the dose-dependent effects of sugar alcohols on the gastrointestinal physiology. The developed model captured the effects of sugar alcohols on ranitidine hydrochloride, metoprolol tartrate, theophylline, cimetidine, and lamivudine. Sensitivity analysis provided quantitative insights into the effects of sugar alcohols dependent on different drug permeability. In addition, our developed model indicated for the first time that a high systemic elimination rate is crucial for the reduction in maximum plasma concentration even for highly permeable drugs. Nonetheless, mannitol/sorbitol level of less than 400 mg had minor effects on the pharmacokinetics of the most sensitive drugs, indicating a provisional no-effect threshold dose. This mechanistic approach provides comprehensive estimation of osmotic effects on variety of drugs. Subsequently, these findings may invoke scientific discussion on the criteria for excipient changes in the context of biowaiver guidelines (e.g. biopharmaceutics classification system-based biowaiver).
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Affiliation(s)
- Miki Yamane
- Sawai Pharmaceutical Co., Ltd., 5-2-30, Miyahara, Yodogawa-ku, Osaka 532-0003, Japan
| | - Kazuki Matsui
- Sawai Pharmaceutical Co., Ltd., 5-2-30, Miyahara, Yodogawa-ku, Osaka 532-0003, Japan.
| | - Masahisa Sugihara
- Sawai Pharmaceutical Co., Ltd., 5-2-30, Miyahara, Yodogawa-ku, Osaka 532-0003, Japan
| | - Yuji Tokunaga
- Sawai Pharmaceutical Co., Ltd., 5-2-30, Miyahara, Yodogawa-ku, Osaka 532-0003, Japan
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30
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Tokunaga Y, Takeuchi K, Okude J, Ori K, Torizawa T, Shimada I. Structural Fingerprints of an Intact Monoclonal Antibody Acquired under Formulated Storage Conditions via 15N Direct Detection Nuclear Magnetic Resonance. J Med Chem 2020; 63:5360-5366. [PMID: 32374601 DOI: 10.1021/acs.jmedchem.0c00231] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Noninvasive evaluation of tertiary structures is fundamental to the research, development, and use of the biologics. However, few methodologies are currently available for evaluating large molecular weight (MW) biologics, such as therapeutic monoclonal antibodies (mAbs; 150 kDa). Here, we have newly developed a 15N direct detection nuclear magnetic resonance (NMR) technique, the 15N direct detection CRINEPT, which allows the observation of the main chain amide resonances of a nondeuterated protein with MW 150 kDa. The technique not only substantially expands the range of proteins applicable to solution NMR studies but also allows the noninvasive structural analyses of intact mAbs in a wide range of temperature and solvent conditions. As a proof of principle, we successfully acquired the 15N-detected CRINEPT spectra of an intact mAb in its formulated solution at 4 °C. The technique was able to discriminate heterogeneous galactosylation states, demonstrating the benefit of high resolution of the 15N direct detection.
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Affiliation(s)
- Yuji Tokunaga
- Molecular Profiling Research Center for Drug Discovery and Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology, 2-3-26 Aomi, Koto-ku, Tokyo 135-0064, Japan.,Research and Development Department, Japan Biological Informatics Consortium, 2-3-26 Aomi, Koto-ku, Tokyo 135-0064, Japan
| | - Koh Takeuchi
- Molecular Profiling Research Center for Drug Discovery and Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology, 2-3-26 Aomi, Koto-ku, Tokyo 135-0064, Japan
| | - Junya Okude
- Chugai Pharmaceutical Company, Ltd., 200 Kajiwara, Kamakura City, Kanagawa 247-8530, Japan
| | - Kazutomo Ori
- Chugai Pharmaceutical Company, Ltd., 200 Kajiwara, Kamakura City, Kanagawa 247-8530, Japan
| | - Takuya Torizawa
- Chugai Pharmaceutical Company, Ltd., 200 Kajiwara, Kamakura City, Kanagawa 247-8530, Japan
| | - Ichio Shimada
- Molecular Profiling Research Center for Drug Discovery and Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology, 2-3-26 Aomi, Koto-ku, Tokyo 135-0064, Japan.,Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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31
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Tatebayashi K, Yamamoto K, Tomida T, Nishimura A, Takayama T, Oyama M, Kozuka-Hata H, Adachi-Akahane S, Tokunaga Y, Saito H. Osmostress enhances activating phosphorylation of Hog1 MAP kinase by mono-phosphorylated Pbs2 MAP2K. EMBO J 2020; 39:e103444. [PMID: 32011004 PMCID: PMC7049814 DOI: 10.15252/embj.2019103444] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 12/22/2019] [Accepted: 01/08/2020] [Indexed: 12/21/2022] Open
Abstract
The MAP kinase (MAPK) Hog1 is the central regulator of osmoadaptation in yeast. When cells are exposed to high osmolarity, the functionally redundant Sho1 and Sln1 osmosensors, respectively, activate the Ste11‐Pbs2‐Hog1 MAPK cascade and the Ssk2/Ssk22‐Pbs2‐Hog1 MAPK cascade. In a canonical MAPK cascade, a MAPK kinase kinase (MAP3K) activates a MAPK kinase (MAP2K) by phosphorylating two conserved Ser/Thr residues in the activation loop. Here, we report that the MAP3K Ste11 phosphorylates only one activating phosphorylation site (Thr‐518) in Pbs2, whereas the MAP3Ks Ssk2/Ssk22 can phosphorylate both Ser‐514 and Thr‐518 under optimal osmostress conditions. Mono‐phosphorylated Pbs2 cannot phosphorylate Hog1 unless the reaction between Pbs2 and Hog1 is enhanced by osmostress. The lack of the osmotic enhancement of the Pbs2‐Hog1 reaction suppresses Hog1 activation by basal MAP3K activities and prevents pheromone‐to‐Hog1 crosstalk in the absence of osmostress. We also report that the rapid‐and‐transient Hog1 activation kinetics at mildly high osmolarities and the slow and prolonged activation kinetics at severely high osmolarities are both caused by a common feedback mechanism.
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Affiliation(s)
- Kazuo Tatebayashi
- Laboratory of Molecular Genetics, Frontier Research Unit, Institute of Medical Science, The University of Tokyo, Tokyo, Japan.,Division of Molecular Cell Signaling, Institute of Medical Science, The University of Tokyo, Tokyo, Japan.,Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Katsuyoshi Yamamoto
- Division of Molecular Cell Signaling, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Taichiro Tomida
- Department of Physiology, School of Medicine, Faculty of Medicine, Toho University, Tokyo, Japan
| | - Akiko Nishimura
- Division of Molecular Cell Signaling, Institute of Medical Science, The University of Tokyo, Tokyo, Japan.,Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Tomomi Takayama
- Division of Molecular Cell Signaling, Institute of Medical Science, The University of Tokyo, Tokyo, Japan.,Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Masaaki Oyama
- Medical Proteomics Laboratory, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Hiroko Kozuka-Hata
- Medical Proteomics Laboratory, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Satomi Adachi-Akahane
- Department of Physiology, School of Medicine, Faculty of Medicine, Toho University, Tokyo, Japan
| | - Yuji Tokunaga
- Molecular Profiling Research Center for Drug Discovery, National Institute of Advanced Industrial Science and Technology, Tokyo, Japan
| | - Haruo Saito
- Division of Molecular Cell Signaling, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
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32
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Nakamura T, Mori Y, Naito M, Okuma Y, Miyagawa S, Takaya H, Kawasaki T, Tokunaga Y. Rotaxanes comprising cyclic phenylenedioxydiacetamides and secondary mono- and bis-dialkylammonium ions: effect of macrocyclic ring size on pseudorotaxane formation. Org Chem Front 2020. [DOI: 10.1039/c9qo01359h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
[2]Rotaxanes, stabilized through multiple and cooperative hydrogen bonding system, were synthesized from dialkylammonium ions and macrocycle possessing two phenylenedioxydiacetamide units and appropriate spacers.
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Affiliation(s)
- Takanori Nakamura
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - Yuka Mori
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - Masaya Naito
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - Yukari Okuma
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - Shinobu Miyagawa
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - Hikaru Takaya
- International Research Center for Elements Science
- Institute for Chemical Research
- Kyoto University
- Uji 611-0011
- Japan
| | - Tsuneomi Kawasaki
- Department of Applied Chemistry
- Tokyo University of Science
- Tokyo 162-8601
- Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
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33
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Aiba S, Tanaka Y, Tokunaga Y, Kawasaki T. Self-Replication of Chiral α-Amino Acids in Strecker-Type Synthesis via Asymmetric Induction and Amplification of Their Own Chiral Intermediate α-Aminonitriles. BCSJ 2019. [DOI: 10.1246/bcsj.20190116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Shohei Aiba
- Department of Materials Science and Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
| | - Yudai Tanaka
- Department of Applied Chemistry, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
| | - Tsuneomi Kawasaki
- Department of Applied Chemistry, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
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34
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Nakamura Y, Tanaka Y, Tanaka M, Yamamoto K, Matsuguma M, Kajimura Y, Tokunaga Y, Yujiri T, Tanizawa Y. Significance of Granulocyte Colony-Stimulating Factor-Combined High-Dose Cytarabine, Cyclophosphamide, and Total Body Irradiation in Allogeneic Hematopoietic Cell Transplantation for Myeloid Malignant Neoplasms. Transplant Proc 2019; 51:896-900. [PMID: 30979482 DOI: 10.1016/j.transproceed.2019.01.079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Revised: 11/08/2018] [Accepted: 01/17/2019] [Indexed: 11/19/2022]
Abstract
Allogeneic hematopoietic cell transplant (HCT) is a curative procedure for myeloid malignant neoplasms, but relapse after HCT remains critical. A conditioning regimen involving granulocyte colony-stimulating factor-combined high-dose cytarabine, cyclophosphamide, and total body irradiation (G-CSF-combined high-dose cytarabine/cyclophosphamide/total-body irradiation [HDCA/CY/TBI]) was reported to improve outcomes after cord blood transplant (CBT) for myeloid malignant neoplasms, but this regimen was not previously evaluated among patients undergoing bone marrow transplant (BMT) or peripheral blood stem cell transplant (PBSCT). METHODS We retrospectively analyzed 28 patients who underwent allogeneic HCT including BMT from a related (1 patient) or unrelated donor (9 patients), PBSCT from a related donor (7 patients), or single-unit CBT from an unrelated donor (11 patients) after a G-CSF-combined HDCA/CY/TBI regimen. RESULTS All patients achieved neutrophil and platelet engraftment, which were significantly more rapid in the BMT/PBSCT group than in the CBT group. Eighteen patients were alive at a median follow-up of 54.3 months. The 3-year relapse and nonrelapse mortality rates were 28.6% and 7.1%, respectively, which were similar between the BMT/PBSCT and CBT groups. Overall survival and disease-free survival at 5 years after HCT were 62.6% and 64.3%, respectively, which were also similar between the BMT/PBSCT and CBT groups. Only disease status at HCT had a significant impact on overall survival and disease-free survival (86.7% with standard risk vs 38.5% with high risk and 86.7% with standard risk vs 38.5% with high risk, respectively). CONCLUSION A G-CSF-combined HDCA/CY/TBI regimen is a promising conditioning in patients with myeloid malignant neoplasms who undergo not only CBT but also BMT or PBSCT.
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Affiliation(s)
- Y Nakamura
- Third Department of Internal Medicine, Yamaguchi University School of Medicine, Ube, Yamaguchi, Japan.
| | - Y Tanaka
- Third Department of Internal Medicine, Yamaguchi University School of Medicine, Ube, Yamaguchi, Japan
| | - M Tanaka
- Third Department of Internal Medicine, Yamaguchi University School of Medicine, Ube, Yamaguchi, Japan
| | - K Yamamoto
- Third Department of Internal Medicine, Yamaguchi University School of Medicine, Ube, Yamaguchi, Japan
| | - M Matsuguma
- Third Department of Internal Medicine, Yamaguchi University School of Medicine, Ube, Yamaguchi, Japan
| | - Y Kajimura
- Third Department of Internal Medicine, Yamaguchi University School of Medicine, Ube, Yamaguchi, Japan
| | - Y Tokunaga
- Third Department of Internal Medicine, Yamaguchi University School of Medicine, Ube, Yamaguchi, Japan
| | - T Yujiri
- Third Department of Internal Medicine, Yamaguchi University School of Medicine, Ube, Yamaguchi, Japan
| | - Y Tanizawa
- Third Department of Internal Medicine, Yamaguchi University School of Medicine, Ube, Yamaguchi, Japan
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35
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Kocsis V, Nakajima T, Matsuda M, Kikkawa A, Kaneko Y, Takashima J, Kakurai K, Arima T, Kagawa F, Tokunaga Y, Tokura Y, Taguchi Y. Magnetization-polarization cross-control near room temperature in hexaferrite single crystals. Nat Commun 2019; 10:1247. [PMID: 30886147 PMCID: PMC6423030 DOI: 10.1038/s41467-019-09205-x] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 02/27/2019] [Indexed: 11/29/2022] Open
Abstract
Mutual control of the electricity and magnetism in terms of magnetic (H) and electric (E) fields, the magnetoelectric (ME) effect, offers versatile low power consumption alternatives to current data storage, logic gate, and spintronic devices. Despite its importance, E-field control over magnetization (M) with significant magnitude was observed only at low temperatures. Here we have successfully stabilized a simultaneously ferrimagnetic and ferroelectric phase in a Y-type hexaferrite single crystal up to 450 K, and demonstrated the reversal of large non-volatile M by E field close to room temperature. Manipulation of the magnetic domains by E field is directly visualized at room temperature by using magnetic force microscopy. The present achievement provides an important step towards the application of ME multiferroics. Mutual control of the electric polarization and magnetization promises for low power consumption spintronic devices but remains challenging. Here the authors show reversal of non-volatile magnetization by electric field as well as the polarization switching by magnetic field in a single-component material, close to room temperature.
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Affiliation(s)
- V Kocsis
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan.
| | - T Nakajima
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan
| | - M Matsuda
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - A Kikkawa
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan
| | - Y Kaneko
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan
| | - J Takashima
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan.,Engineering R & D Group, NGK Spark Plug Co., Ltd., Minato-ku, Tokyo, 108-8601, Japan
| | - K Kakurai
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan.,Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS), Tokai, Ibaraki, 319-1106, Japan
| | - T Arima
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan.,Department of Advanced Materials Science, University of Tokyo, Kashiwa, 277-8561, Japan
| | - F Kagawa
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan.,Department of Applied Physics, University of Tokyo, Hongo, Tokyo, 113-8656, Japan
| | - Y Tokunaga
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan.,Department of Advanced Materials Science, University of Tokyo, Kashiwa, 277-8561, Japan
| | - Y Tokura
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan.,Department of Applied Physics, University of Tokyo, Hongo, Tokyo, 113-8656, Japan
| | - Y Taguchi
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan.
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36
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Miyagawa S, Aiba S, Kawamoto H, Tokunaga Y, Kawasaki T. Absolute asymmetric Strecker synthesis in a mixed aqueous medium: reliable access to enantioenriched α-aminonitrile. Org Biomol Chem 2019; 17:1238-1244. [PMID: 30656321 DOI: 10.1039/c8ob03092h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Without using chiral sources, the Strecker reaction of achiral hydrogen cyanide, p-tolualdehyde and benzhydrylamine gave enantioenriched l- or d-N-benzhydryl-α-(p-tolyl)glycine nitriles with up to >99% ee in a mixed solvent of water and methanol. Therefore, total spontaneous resolution of α-aminonitriles could occur through a prebiotic mechanism of α-amino acid synthesis. Moreover, it was demonstrated that the repetition of partial dissolution and crystallization of a suspended conglomerate of aminonitrile under solution-phase racemization could generate the enantiomeric imbalance to afford, in combination with the amplification of chirality, an enantioenriched product in every case. Among the 73 experiments that were carried out, d- and l-enriched isomers occurred 36 and 37 times, respectively. This stochastic behavior, under achiral or racemic starting conditions, meets the requirements of the spontaneous absolute asymmetric Strecker synthesis. The implications of the present results for the origin of chirality of α-amino acids are discussed.
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Affiliation(s)
- Shinobu Miyagawa
- Department of Materials Science and Engineering, University of Fukui, Bunkyo, Fukui, 910-8507, Japan
| | - Shohei Aiba
- Department of Materials Science and Engineering, University of Fukui, Bunkyo, Fukui, 910-8507, Japan
| | - Hajime Kawamoto
- Department of Materials Science and Engineering, University of Fukui, Bunkyo, Fukui, 910-8507, Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering, University of Fukui, Bunkyo, Fukui, 910-8507, Japan
| | - Tsuneomi Kawasaki
- Department of Applied Chemistry, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan.
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37
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Saitoh Y, Kaneda K, Tokunaga Y, Murakawa M. Retraction notice to “Infusion of amino acid enriched solution hastens recovery from neuromuscular block caused by vecuronium” [Br J Anaesth 2001; 86: 814–821]. Br J Anaesth 2019; 122:155. [DOI: 10.1016/j.bja.2018.11.006] [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: 10/27/2022] Open
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38
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Okuma Y, Tsukamoto T, Inagaki T, Miyagawa S, Kimura M, Naito M, Takaya H, Kawasaki T, Tokunaga Y. Rotational isomerism of the amide units in rotaxanes based on a cyclic tetraamide and secondary ammonium ions. Org Chem Front 2019. [DOI: 10.1039/c9qo00096h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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
We describe the synthesis of [2]rotaxanes consisting of a macrocyclic tetraamide and mono- and bis-ammonium ions and their conformational isomerism.
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Affiliation(s)
- Yukari Okuma
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - Toshihiro Tsukamoto
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - Takayuki Inagaki
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - Shinobu Miyagawa
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - Masaki Kimura
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - Masaya Naito
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - Hikaru Takaya
- International Research Center for Elements Science
- Institute for Chemical Research
- Kyoto University
- Uji 611-0011
- Japan
| | - Tsuneomi Kawasaki
- Department of Applied Chemistry
- Tokyo University of Science
- Tokyo 162-8601
- Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
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39
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Yu XZ, Koshibae W, Tokunaga Y, Shibata K, Taguchi Y, Nagaosa N, Tokura Y. Transformation between meron and skyrmion topological spin textures in a chiral magnet. Nature 2018; 564:95-98. [DOI: 10.1038/s41586-018-0745-3] [Citation(s) in RCA: 183] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 10/11/2018] [Indexed: 11/09/2022]
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40
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Tokunaga Y, Chang S, Kita Y, Okamoto T. P2.16-41 Intraoperative Computed Tomography After Tumor Marking with Metal Clips for Non-Palpable Lung Tumors. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1516] [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: 11/16/2022]
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41
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Honda M, Matsuda C, Tanaka C, Kondo K, Takahashi T, Kosugi C, Tokunaga Y, Takemoto H, Kim H, Sakamoto J, Oba K, Mishima H. A phase II study of bevacizumab and irinotecan plus alternate-day S-1 as a second-line therapy for colorectal cancer: The AIRS study. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy281.027] [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: 11/12/2022] Open
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42
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Kimura M, Miyashita J, Miyagawa S, Kawasaki T, Takaya H, Tokunaga Y. Recognition Behavior of a Porphyrin Heterodimer Self-Assembled through an Amidinium-Carboxylate Salt Bridge. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800382] [Citation(s) in RCA: 3] [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: 01/10/2023]
Affiliation(s)
- Masaki Kimura
- Department of Materials Science and Engineering, Faculty of Engineering; University of Fukui; Bunkyo, Fukui 910-8507 Japan
| | - Jyunichi Miyashita
- Department of Materials Science and Engineering, Faculty of Engineering; University of Fukui; Bunkyo, Fukui 910-8507 Japan
| | - Shinobu Miyagawa
- Department of Materials Science and Engineering, Faculty of Engineering; University of Fukui; Bunkyo, Fukui 910-8507 Japan
| | - Tsuneomi Kawasaki
- Department of Applied Chemistry; Tokyo University of Science; Kagurazaka, Shinjuku-ku, Tokyo 162-8601 Japan
| | - Hikaru Takaya
- International Research Center for Elements Science, Institute for Chemical Research; Kyoto University; Uji 611-0011 Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering, Faculty of Engineering; University of Fukui; Bunkyo, Fukui 910-8507 Japan
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43
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Tsukamoto T, Sasahara R, Muranaka A, Miura Y, Suzuki Y, Kimura M, Miyagawa S, Kawasaki T, Kobayashi N, Uchiyama M, Tokunaga Y. Synthesis of a Chiral [2]Rotaxane: Induction of a Helical Structure through Double Threading. Org Lett 2018; 20:4745-4748. [PMID: 30058808 DOI: 10.1021/acs.orglett.8b01727] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A helically chiral [2]rotaxane featuring two ammonium ion recognition sites in the dumbbell-like component and a calix-bis-crown ether as the macrocyclic component was synthesized, but with no chirality in either individual component. The enantiomeric nature of the isomers, separated through chiral HPLC, was apparent in their CD spectra, which were mirror images for all wavelengths.
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Affiliation(s)
- Toshihiro Tsukamoto
- Department of Materials Science and Engineering, Faculty of Engineering , Fukui University , Bunkyo , Fukui 910-8507 , Japan
| | - Ryota Sasahara
- Department of Materials Science and Engineering, Faculty of Engineering , Fukui University , Bunkyo , Fukui 910-8507 , Japan
| | - Atsuya Muranaka
- Elements Chemistry Laboratory , RIKEN Cluster for Pioneering Research , 2-1 Hirosawa , Wako-shi , Saitama 351-0198 , Japan
| | - Yuzuki Miura
- Graduate School of Pharmaceutical Sciences , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan
| | - Yu Suzuki
- Tenure-Track Program for Innovative Research , University of Fukui , Bunkyo , Fukui 910-8507 , Japan
| | - Masaki Kimura
- Department of Materials Science and Engineering, Faculty of Engineering , Fukui University , Bunkyo , Fukui 910-8507 , Japan
| | - Shinobu Miyagawa
- Department of Materials Science and Engineering, Faculty of Engineering , Fukui University , Bunkyo , Fukui 910-8507 , Japan
| | - Tsuneomi Kawasaki
- Department of Applied Chemistry , Tokyo University of Science , Kagurazaka, Shinjuku-ku, Tokyo 162-8601 , Japan
| | - Nagao Kobayashi
- Faculty of Textile Science and Technology , Shinshu University , Tokida, Ueda , Nagano 386-8567 , Japan
| | - Masanobu Uchiyama
- Elements Chemistry Laboratory , RIKEN Cluster for Pioneering Research , 2-1 Hirosawa , Wako-shi , Saitama 351-0198 , Japan.,Graduate School of Pharmaceutical Sciences , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering, Faculty of Engineering , Fukui University , Bunkyo , Fukui 910-8507 , Japan
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44
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Tsubaki A, Morishita S, Tokunaga Y, Sato D, Qin W, Kojima S, Onishi H. Laterality of cortical oxygenation in the prefrontal cortex during 20 min of moderate-intensity cycling exercise: A near-infrared spectroscopy study. Ann Phys Rehabil Med 2018. [DOI: 10.1016/j.rehab.2018.05.1074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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45
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Takamatsu N, Aiba S, Yamada T, Tokunaga Y, Kawasaki T. Cover Feature: Highly Stereoselective Strecker Synthesis Induced by a Slight Modification of Benzhydrylamine from Achiral to Chiral (Chem. Eur. J. 6/2018). Chemistry 2018. [DOI: 10.1002/chem.201705072] [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: 11/11/2022]
Affiliation(s)
- Naoya Takamatsu
- Department of Materials Science and Engineering; University of Fukui, Bunkyo; Fukui 910-8507 Japan
| | - Shohei Aiba
- Department of Materials Science and Engineering; University of Fukui, Bunkyo; Fukui 910-8507 Japan
| | - Takuya Yamada
- Department of Materials Science and Engineering; University of Fukui, Bunkyo; Fukui 910-8507 Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering; University of Fukui, Bunkyo; Fukui 910-8507 Japan
| | - Tsuneomi Kawasaki
- Department of Applied Chemistry; Tokyo University of Science, Kagurazaka, Shinjuku-ku; Tokyo 162-8601 Japan
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46
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Fujino T, Naitoh H, Miyagawa S, Kimura M, Kawasaki T, Yoshida K, Inoue H, Takagawa H, Tokunaga Y. Formation of [2]- and [3]Rotaxanes through Bridging under Kinetic and Thermodynamic Control. Org Lett 2018; 20:369-372. [PMID: 29283267 DOI: 10.1021/acs.orglett.7b03615] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An efficient synthesis of a doubly stranded [3]rotaxane has been developed through bridging of a pseudo[3]rotaxane featuring two axle components. Reversible azine formation was effective as the bridging reaction. Kinetic and thermodynamic conditions provided the [2]- and [3]rotaxanes, respectively.
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Affiliation(s)
- Takaaki Fujino
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui , Bunkyo, Fukui 910-8507, Japan
| | - Hirotake Naitoh
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui , Bunkyo, Fukui 910-8507, Japan
| | - Shinobu Miyagawa
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui , Bunkyo, Fukui 910-8507, Japan
| | - Masaki Kimura
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui , Bunkyo, Fukui 910-8507, Japan
| | - Tsuneomi Kawasaki
- Department of Applied Chemistry, Tokyo University of Science , Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Kazuyuki Yoshida
- Forensic Science Laboratory, Fukui Prefectural Police Headquarters , Ohte, Fukui 910-8515, Japan
| | - Hajime Inoue
- Forensic Science Laboratory, Fukui Prefectural Police Headquarters , Ohte, Fukui 910-8515, Japan
| | - Hiroaki Takagawa
- Forensic Science Laboratory, Fukui Prefectural Police Headquarters , Ohte, Fukui 910-8515, Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui , Bunkyo, Fukui 910-8507, Japan
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47
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Hattori T, Sakai H, Tokunaga Y, Kambe S, Matsuda TD, Haga Y. Evidence for Spin Singlet Pairing with Strong Uniaxial Anisotropy in URu_{2}Si_{2} Using Nuclear Magnetic Resonance. Phys Rev Lett 2018; 120:027001. [PMID: 29376726 DOI: 10.1103/physrevlett.120.027001] [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] [Received: 07/12/2017] [Indexed: 06/07/2023]
Abstract
In order to identify the spin contribution to superconducting pairing compatible with the so-called "hidden order", ^{29}Si nuclear magnetic resonance measurements have been performed using a high-quality single crystal of URu_{2}Si_{2}. A clear reduction of the ^{29}Si Knight shift in the superconducting state has been observed under a magnetic field applied along the crystalline c axis, corresponding to the magnetic easy axis. These results provide direct evidence for the formation of spin-singlet Cooper pairs. Consequently, results indicating a very tiny change of the in-plane Knight shift reported previously demonstrate extreme uniaxial anisotropy for the spin susceptibility in the hidden order state.
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Affiliation(s)
- T Hattori
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - H Sakai
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Y Tokunaga
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - S Kambe
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - T D Matsuda
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Y Haga
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
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48
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Hosaka S, Tokunaga Y. Differences in Powder Properties of Two 1,4-Dihydropyridine-Type Compounds Evaluated through Thermal Analysis. Chem Pharm Bull (Tokyo) 2017; 65:1175-1178. [PMID: 29199222 DOI: 10.1248/cpb.c17-00375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The powder properties of two 1,4-dihydropyridine type compounds, manidipine dihydrochloride (Man) and benidipine hydrochloride (Ben), which possess similar physicochemical properties, were compared through thermal and mechanical analyses. Man and Ben were compressed with lactose monohydrate (Lac) and magnesium stearate (Mgst) at different compression forces. As an index, we focused on the onset temperatures of Lac dehydration during thermal analysis and plotted them against compression forces to evaluate the differences in powder properties between Man and Ben. To discuss in detail, the Lac ratio was selected as a formulation factor and compression speed as a process factor, which would be influenced to the onset temperature or its profile. It could be represented that Man was more adherent than Ben through thermal analysis by changing these critical factors, which were consistent with the results obtained through mechanical analysis.
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Affiliation(s)
- Shouichi Hosaka
- Research and Development Division, Sawai Pharmaceutical Co., Ltd
| | - Yuji Tokunaga
- Research and Development Division, Sawai Pharmaceutical Co., Ltd
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49
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Takamatsu N, Aiba S, Yamada T, Tokunaga Y, Kawasaki T. Highly Stereoselective Strecker Synthesis Induced by a Slight Modification of Benzhydrylamine from Achiral to Chiral. Chemistry 2017; 24:1304-1310. [DOI: 10.1002/chem.201704033] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Naoya Takamatsu
- Department of Materials Science and Engineering; University of Fukui, Bunkyo; Fukui 910-8507 Japan
| | - Shohei Aiba
- Department of Materials Science and Engineering; University of Fukui, Bunkyo; Fukui 910-8507 Japan
| | - Takuya Yamada
- Department of Materials Science and Engineering; University of Fukui, Bunkyo; Fukui 910-8507 Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering; University of Fukui, Bunkyo; Fukui 910-8507 Japan
| | - Tsuneomi Kawasaki
- Department of Applied Chemistry; Tokyo University of Science, Kagurazaka, Shinjuku-ku; Tokyo 162-8601 Japan
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50
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Nakamoto Y, Mikami R, Umeki M, Tokunaga Y, Okumoto T, Kawamura T, Fujiwara H, Doi S, Noda M, Tomita N. S-1/oxaliplatin (SOX) plus bevacizumab (Bev) as first line followed by S-1/irinotecan (IRIS) plus cetuximab (Cmab) as second line therapy in metastatic colorectal cancer (mCRC) (SOBIC trial). Ann Oncol 2017. [DOI: 10.1093/annonc/mdx659.005] [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: 11/13/2022] Open
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