1
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Okumura T, Azuma T, Bennett DA, Chiu I, Doriese WB, Durkin MS, Fowler JW, Gard JD, Hashimoto T, Hayakawa R, Hilton GC, Ichinohe Y, Indelicato P, Isobe T, Kanda S, Katsuragawa M, Kawamura N, Kino Y, Mine K, Miyake Y, Morgan KM, Ninomiya K, Noda H, O'Neil GC, Okada S, Okutsu K, Paul N, Reintsema CD, Schmidt DR, Shimomura K, Strasser P, Suda H, Swetz DS, Takahashi T, Takeda S, Takeshita S, Tampo M, Tatsuno H, Ueno Y, Ullom JN, Watanabe S, Yamada S. Proof-of-Principle Experiment for Testing Strong-Field Quantum Electrodynamics with Exotic Atoms: High Precision X-Ray Spectroscopy of Muonic Neon. Phys Rev Lett 2023; 130:173001. [PMID: 37172243 DOI: 10.1103/physrevlett.130.173001] [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: 12/08/2021] [Revised: 02/10/2023] [Accepted: 03/10/2023] [Indexed: 05/14/2023]
Abstract
To test bound-state quantum electrodynamics (BSQED) in the strong-field regime, we have performed high precision x-ray spectroscopy of the 5g-4f and 5f- 4d transitions (BSQED contribution of 2.4 and 5.2 eV, respectively) of muonic neon atoms in the low-pressure gas phase without bound electrons. Muonic atoms have been recently proposed as an alternative to few-electron high-Z ions for BSQED tests by focusing on circular Rydberg states where nuclear contributions are negligibly small. We determined the 5g_{9/2}- 4f_{7/2} transition energy to be 6297.08±0.04(stat)±0.13(syst) eV using superconducting transition-edge sensor microcalorimeters (5.2-5.5 eV FWHM resolution), which agrees well with the most advanced BSQED theoretical prediction of 6297.26 eV.
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Affiliation(s)
- T Okumura
- Atomic, Molecular, and Optical Physics Laboratory, RIKEN, Wako 351-0198, Japan
| | - T Azuma
- Atomic, Molecular, and Optical Physics Laboratory, RIKEN, Wako 351-0198, Japan
| | - D A Bennett
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - I Chiu
- Institute for Radiation Sciences, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - W B Doriese
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - M S Durkin
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - J W Fowler
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - J D Gard
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - T Hashimoto
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai 319-1184, Japan
| | - R Hayakawa
- Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - G C Hilton
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Y Ichinohe
- Department of Physics, Rikkyo University, Tokyo 171-8501, Japan
| | - P Indelicato
- Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France, Case 74, 4, place Jussieu, 75005 Paris, France
| | - T Isobe
- RIKEN Nishina Center, RIKEN, Wako 351-0198, Japan
| | - S Kanda
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - M Katsuragawa
- Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - N Kawamura
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - Y Kino
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - K Mine
- Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - Y Miyake
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - K M Morgan
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
- Department of Physics, University of Colorado Boulder, Boulder, Colorado 80309, USA
| | - K Ninomiya
- Institute for Radiation Sciences, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - H Noda
- Department of Earth and Space Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - G C O'Neil
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - S Okada
- Engineering Science Laboratory, Chubu University, Kasugai, Aichi 487-8501, Japan
| | - K Okutsu
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - N Paul
- Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France, Case 74, 4, place Jussieu, 75005 Paris, France
| | - C D Reintsema
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - D R Schmidt
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - K Shimomura
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - P Strasser
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - H Suda
- Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - D S Swetz
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - T Takahashi
- Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - S Takeda
- Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - S Takeshita
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - M Tampo
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - H Tatsuno
- Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - Y Ueno
- Atomic, Molecular, and Optical Physics Laboratory, RIKEN, Wako 351-0198, Japan
| | - J N Ullom
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - S Watanabe
- Department of Space Astronomy and Astrophysics, Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa 252-5210, Japan
| | - S Yamada
- Department of Physics, Rikkyo University, Tokyo 171-8501, Japan
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2
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Yoshizawa S, Azuma T, Kojima K, Inomura K, Hasegawa M, Nishimura Y, Kikuchi M, Armin G, Tsukamoto Y, Miyashita H, Ifuku K, Yamano T, Marchetti A, Fukuzawa H, Sudo Y, Kamikawa R. Light-driven Proton Pumps as a Potential Regulator for Carbon Fixation in Marine Diatoms. Microbes Environ 2023; 38:n/a. [PMID: 37344444 DOI: 10.1264/jsme2.me23015] [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: 06/23/2023] Open
Abstract
Diatoms are a major phytoplankton group responsible for approximately 20% of carbon fixation on Earth. They perform photosynthesis using light-harvesting chlo-rophylls located in plastids, an organelle obtained through eukaryote-eukaryote endosymbiosis. Microbial rhodopsin, a photoreceptor distinct from chlo-rophyll-based photosystems, was recently identified in some diatoms. However, the physiological function of diatom rhodopsin remains unclear. Heterologous expression techniques were herein used to investigate the protein function and subcellular localization of diatom rhodopsin. We demonstrated that diatom rhodopsin acts as a light-driven proton pump and localizes primarily to the outermost membrane of four membrane-bound complex plastids. Using model simulations, we also examined the effects of pH changes inside the plastid due to rhodopsin-mediated proton transport on photosynthesis. The results obtained suggested the involvement of rhodopsin-mediated local pH changes in a photosynthetic CO2-concentrating mechanism in rhodopsin-possessing diatoms.
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Affiliation(s)
- Susumu Yoshizawa
- Atmosphere and Ocean Research Institute, The University of Tokyo
- Graduate School of Frontier Sciences, The University of Tokyo
- Collaborative Research Institute for Innovative Microbiology, The University of Tokyo
| | - Tomonori Azuma
- Graduate School of Human and Environmental Studies, Kyoto University
| | - Keiichi Kojima
- School of Pharmaceutical Sciences, Okayama University
- Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
| | | | - Masumi Hasegawa
- Atmosphere and Ocean Research Institute, The University of Tokyo
- Graduate School of Frontier Sciences, The University of Tokyo
| | - Yosuke Nishimura
- Atmosphere and Ocean Research Institute, The University of Tokyo
| | | | | | - Yuya Tsukamoto
- Atmosphere and Ocean Research Institute, The University of Tokyo
| | - Hideaki Miyashita
- Graduate School of Human and Environmental Studies, Kyoto University
| | | | | | - Adrian Marchetti
- Department of Earth, Marine and Environmental Sciences, University of North Carolina at Chapel Hill
| | | | - Yuki Sudo
- School of Pharmaceutical Sciences, Okayama University
- Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
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Kamikawa R, Mochizuki T, Sakamoto M, Tanizawa Y, Nakayama T, Onuma R, Cenci U, Moog D, Speak S, Sarkozi K, Toseland A, van Oosterhout C, Oyama K, Kato M, Kume K, Kayama M, Azuma T, Ishii KI, Miyashita H, Henrissat B, Lombard V, Win J, Kamoun S, Kashiyama Y, Mayama S, Miyagishima SY, Tanifuji G, Mock T, Nakamura Y. Genome evolution of a nonparasitic secondary heterotroph, the diatom Nitzschia putrida. Sci Adv 2022; 8:eabi5075. [PMID: 35486731 PMCID: PMC9054022 DOI: 10.1126/sciadv.abi5075] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 03/16/2022] [Indexed: 06/14/2023]
Abstract
Secondary loss of photosynthesis is observed across almost all plastid-bearing branches of the eukaryotic tree of life. However, genome-based insights into the transition from a phototroph into a secondary heterotroph have so far only been revealed for parasitic species. Free-living organisms can yield unique insights into the evolutionary consequence of the loss of photosynthesis, as the parasitic lifestyle requires specific adaptations to host environments. Here, we report on the diploid genome of the free-living diatom Nitzschia putrida (35 Mbp), a nonphotosynthetic osmotroph whose photosynthetic relatives contribute ca. 40% of net oceanic primary production. Comparative analyses with photosynthetic diatoms and heterotrophic algae with parasitic lifestyle revealed that a combination of gene loss, the accumulation of genes involved in organic carbon degradation, a unique secretome, and the rapid divergence of conserved gene families involved in cell wall and extracellular metabolism appear to have facilitated the lifestyle of a free-living secondary heterotroph.
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Affiliation(s)
- Ryoma Kamikawa
- Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Takako Mochizuki
- Department of Informatics, National Institute of Genetics, Research Organization of Information and Systems, Shizuoka 411-8540, Japan
| | - Mika Sakamoto
- Department of Informatics, National Institute of Genetics, Research Organization of Information and Systems, Shizuoka 411-8540, Japan
| | - Yasuhiro Tanizawa
- Department of Informatics, National Institute of Genetics, Research Organization of Information and Systems, Shizuoka 411-8540, Japan
| | - Takuro Nakayama
- Graduate School of Life Sciences, Tohoku University, Sendai 980-8578, Japan
| | - Ryo Onuma
- Department of Gene Function and Phenomics, National Institute of Genetics, Shizuoka 411-8540, Japan
| | - Ugo Cenci
- Université de Lille, CNRS, UMR 8576 – UGSF – Unité de Glycobiologie Structurale et Fonctionnelle, F-59000 Lille, France
| | - Daniel Moog
- Laboratory for Cell Biology, Philipps University Marburg, Karl-von-Frisch-Str. 8
- SYNMIKRO Research Center, Hans-Meerwein-Str. 6, 35032, Marburg, Germany
| | - Samuel Speak
- School of Environmental Sciences, University of East Anglia, Norwich Research Park, Norwich, UK
| | - Krisztina Sarkozi
- School of Environmental Sciences, University of East Anglia, Norwich Research Park, Norwich, UK
| | - Andrew Toseland
- School of Environmental Sciences, University of East Anglia, Norwich Research Park, Norwich, UK
| | - Cock van Oosterhout
- School of Environmental Sciences, University of East Anglia, Norwich Research Park, Norwich, UK
| | - Kaori Oyama
- Graduate School of Humanities and Sciences, Ochanomizu University, Tokyo, Japan
| | - Misako Kato
- Graduate School of Humanities and Sciences, Ochanomizu University, Tokyo, Japan
| | - Keitaro Kume
- Department of Clinical Medicine, Faculty of Medicine, University of Tsukuba, Ibaraki 305-8572, Japan
| | - Motoki Kayama
- Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
| | - Tomonori Azuma
- Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
| | - Ken-ichiro Ishii
- Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
| | - Hideaki Miyashita
- Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
| | - Bernard Henrissat
- Architecture et Fonction des Macromolécules Biologiques (AFMB), CNRS, Université Aix-Marseille, 163 Avenue de Luminy, 13288 Marseille, France
- INRA, USC 1408 AFMB, 13288 Marseille, France
- Department of Biological Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Vincent Lombard
- Architecture et Fonction des Macromolécules Biologiques (AFMB), CNRS, Université Aix-Marseille, 163 Avenue de Luminy, 13288 Marseille, France
- INRA, USC 1408 AFMB, 13288 Marseille, France
| | - Joe Win
- The Sainsbury Laboratory, University of East Anglia, Norwich Research Park, Norwich, UK
| | - Sophien Kamoun
- The Sainsbury Laboratory, University of East Anglia, Norwich Research Park, Norwich, UK
| | - Yuichiro Kashiyama
- Graduate School of Engineering, Fukui University of Technology, Fukui, Japan
| | - Shigeki Mayama
- Advanced Support Center for Science Teachers, Tokyo Gakugei University, Koganei, Tokyo, Japan
| | - Shin-ya Miyagishima
- Department of Gene Function and Phenomics, National Institute of Genetics, Shizuoka 411-8540, Japan
| | - Goro Tanifuji
- Department of Zoology, National Museum of Nature and Science, Tsukuba 305-0005, Japan
| | - Thomas Mock
- School of Environmental Sciences, University of East Anglia, Norwich Research Park, Norwich, UK
| | - Yasukazu Nakamura
- Department of Informatics, National Institute of Genetics, Research Organization of Information and Systems, Shizuoka 411-8540, Japan
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4
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Nakamura Y, Onodera S, Takano M, Katakura A, Nomura T, Azuma T. Development of a targeted gene panel for the diagnosis of Gorlin syndrome. Int J Oral Maxillofac Surg 2022; 51:1431-1444. [DOI: 10.1016/j.ijom.2022.03.054] [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] [Received: 09/08/2021] [Revised: 03/15/2022] [Accepted: 03/16/2022] [Indexed: 11/30/2022]
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5
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Azuma T, Pánek T, Tice AK, Kayama M, Kobayashi M, Miyashita H, Suzaki T, Yabuki A, Brown MW, Kamikawa R. An enigmatic stramenopile sheds light on early evolution in Ochrophyta plastid organellogenesis. Mol Biol Evol 2022; 39:6555011. [PMID: 35348760 PMCID: PMC9004409 DOI: 10.1093/molbev/msac065] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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] [Indexed: 11/14/2022] Open
Abstract
Ochrophyta is an algal group belonging to the Stramenopiles and comprises diverse lineages of algae which contribute significantly to the oceanic ecosystems as primary producers. However, early evolution of the plastid organelle in Ochrophyta is not fully understood. In this study, we provide a well-supported tree of the Stramenopiles inferred by the large-scale phylogenomic analysis that unveils the eukaryvorous (nonphotosynthetic) protist Actinophrys sol (Actinophryidae) is closely related to Ochrophyta. We used genomic and transcriptomic data generated from A. sol to detect molecular traits of its plastid and we found no evidence of plastid genome and plastid-mediated biosynthesis, consistent with previous ultrastructural studies that did not identify any plastids in Actinophryidae. Moreover, our phylogenetic analyses of particular biosynthetic pathways provide no evidence of a current and past plastid in A. sol. However, we found more than a dozen organellar aminoacyl-tRNA synthases (aaRSs) that are of algal origin. Close relationships between aaRS from A. sol and their ochrophyte homologs document gene transfer of algal genes that happened before the divergence of Actinophryidae and Ochrophyta lineages. We further showed experimentally that organellar aaRSs of A. sol are targeted exclusively to mitochondria, although organellar aaRSs in Ochrophyta are dually targeted to mitochondria and plastids. Together, our findings suggested that the last common ancestor of Actinophryidae and Ochrophyta had not yet completed the establishment of host–plastid partnership as seen in the current Ochrophyta species, but acquired at least certain nuclear-encoded genes for the plastid functions.
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Affiliation(s)
- Tomonori Azuma
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida nihonmatsu cho, Sakyo ku, Kyoto, Kyoto, Japan
| | - Tomáš Pánek
- Department of Zoology, Faculty of Science, Charles University, Prague, Czech Republic.,Department of Biological Sciences, Mississippi State University, Mississippi State, MS, USA
| | - Alexander K Tice
- Department of Biological Sciences, Mississippi State University, Mississippi State, MS, USA
| | - Motoki Kayama
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida nihonmatsu cho, Sakyo ku, Kyoto, Kyoto, Japan
| | | | - Hideaki Miyashita
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida nihonmatsu cho, Sakyo ku, Kyoto, Kyoto, Japan
| | | | - Akinori Yabuki
- Japan Agency for Marine-Earth Science and Technology, Japan
| | - Matthew W Brown
- Department of Biological Sciences, Mississippi State University, Mississippi State, MS, USA
| | - Ryoma Kamikawa
- Graduate School of Agriculture, Kyoto University, Kitashirakawa oiwake cho, Sakyo ku, Kyoto, Kyoto, Japan
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6
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Okumura T, Azuma T, Bennett DA, Caradonna P, Chiu I, Doriese WB, Durkin MS, Fowler JW, Gard JD, Hashimoto T, Hayakawa R, Hilton GC, Ichinohe Y, Indelicato P, Isobe T, Kanda S, Kato D, Katsuragawa M, Kawamura N, Kino Y, Kubo MK, Mine K, Miyake Y, Morgan KM, Ninomiya K, Noda H, O'Neil GC, Okada S, Okutsu K, Osawa T, Paul N, Reintsema CD, Schmidt DR, Shimomura K, Strasser P, Suda H, Swetz DS, Takahashi T, Takeda S, Takeshita S, Tampo M, Tatsuno H, Tong XM, Ueno Y, Ullom JN, Watanabe S, Yamada S. Deexcitation Dynamics of Muonic Atoms Revealed by High-Precision Spectroscopy of Electronic K X Rays. Phys Rev Lett 2021; 127:053001. [PMID: 34397250 DOI: 10.1103/physrevlett.127.053001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 06/11/2021] [Indexed: 06/13/2023]
Abstract
We observed electronic K x rays emitted from muonic iron atoms using superconducting transition-edge sensor microcalorimeters. The energy resolution of 5.2 eV in FWHM allowed us to observe the asymmetric broad profile of the electronic characteristic Kα and Kβ x rays together with the hypersatellite K^{h}α x rays around 6 keV. This signature reflects the time-dependent screening of the nuclear charge by the negative muon and the L-shell electrons, accompanied by electron side feeding. Assisted by a simulation, these data clearly reveal the electronic K- and L-shell hole production and their temporal evolution on the 10-20 fs scale during the muon cascade process.
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Affiliation(s)
- T Okumura
- Atomic, Molecular and Optical Physics Laboratory, RIKEN, Wako 351-0198, Japan
| | - T Azuma
- Atomic, Molecular and Optical Physics Laboratory, RIKEN, Wako 351-0198, Japan
| | - D A Bennett
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - P Caradonna
- Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - I Chiu
- Department of Chemistry, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - W B Doriese
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - M S Durkin
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - J W Fowler
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - J D Gard
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - T Hashimoto
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai 319-1184, Japan
| | - R Hayakawa
- Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - G C Hilton
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Y Ichinohe
- Department of Physics, Rikkyo University, Tokyo 171-8501, Japan
| | - P Indelicato
- Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France, Case 74, 4, place Jussieu, 75005 Paris, France
| | - T Isobe
- RIKEN Nishina Center, RIKEN, Wako 351-0198, Japan
| | - S Kanda
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - D Kato
- National Institute for Fusion Science (NIFS), Toki, Gifu 509-5292, Japan
| | - M Katsuragawa
- Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - N Kawamura
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - Y Kino
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - M K Kubo
- Department of Natural Sciences, College of Liberal Arts, International Christian University, Mitaka, Tokyo 181-8585, Japan
| | - K Mine
- Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - Y Miyake
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - K M Morgan
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - K Ninomiya
- Department of Chemistry, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - H Noda
- Department of Earth and Space Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - G C O'Neil
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - S Okada
- Atomic, Molecular and Optical Physics Laboratory, RIKEN, Wako 351-0198, Japan
| | - K Okutsu
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - T Osawa
- Materials Sciences Research Center (MSRC), Japan Atomic Energy Agency (JAEA), Tokai 319-1184, Japan
| | - N Paul
- Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France, Case 74, 4, place Jussieu, 75005 Paris, France
| | - C D Reintsema
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - D R Schmidt
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - K Shimomura
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - P Strasser
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - H Suda
- Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - D S Swetz
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - T Takahashi
- Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - S Takeda
- Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - S Takeshita
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - M Tampo
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - H Tatsuno
- Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - X M Tong
- Center for Computational Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
| | - Y Ueno
- Atomic, Molecular and Optical Physics Laboratory, RIKEN, Wako 351-0198, Japan
| | - J N Ullom
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - S Watanabe
- Department of Space Astronomy and Astrophysics, Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa 252-5210, Japan
| | - S Yamada
- Department of Physics, Rikkyo University, Tokyo 171-8501, Japan
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7
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Yoneyama S, Maeda K, Sadamori A, Saitoh S, Tsuda M, Azuma T, Nagano A, Tomiyama T, Matsumoto T. Construction of a genetic linkage map and detection of quantitative trait locus for the ergothioneine content in tamogitake mushroom ( Pleurotus cornucopiae var. citrinopileatus). MYCOSCIENCE 2021; 62:71-80. [PMID: 37090022 PMCID: PMC9157747 DOI: 10.47371/mycosci.2020.11.003] [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: 06/17/2020] [Revised: 11/05/2020] [Accepted: 11/08/2020] [Indexed: 11/16/2022]
Abstract
Developing high-content strains of L-ergothioneine (EGT), an antioxidant amino acid, is an important breeding target for tamogitake mushroom, Pleurotus cornucopiae var. citrinopileatus. We constructed a genetic linkage map based on segregation analysis of markers in 105 F1 progenies. The loci of 245 markers, including 10 AFLP markers, 195 Rad markers, 2 mating type factors, and 38 gene markers, were mapped. The map contained 12 linkage groups with a total genetic distance of 906.8 cM, and an average marker interval of 4.0 cM. The population from crossing between tester monokaryon and F1 progenies was used to characterize quantitative trait loci (QTL) for EGT content. With composite interval mapping (CIM) method, QTL of EGT content were found to be located in linkage group 10, having a Logarithm of the odds (LOD) score of 2.53 with a 10.1% contribution rate. Moreover, a single nucleotide polymorphism (SNP), A/T, was identified in a gene region of the genome in the neighborhood where the QTL peak existed. This SNP genotype was in good agreement with the EGT phenotypes of each strain in the both QTL population and wild population. Thus, this SNP would have great potential value to use the marker-assisted selection (MAS) for this mushroom with high EGT content.
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Affiliation(s)
- Shozo Yoneyama
- Forest Products Research Institute, Hokkaido Research Organization
| | - Kaede Maeda
- Fungus/Mushroom Resource and Research Center, Faculty of Agriculture, Tottori University
| | - Ayuka Sadamori
- Fungus/Mushroom Resource and Research Center, Faculty of Agriculture, Tottori University
| | - Sayaka Saitoh
- Forest Products Research Institute, Hokkaido Research Organization
| | - Mayumi Tsuda
- Forest Products Research Institute, Hokkaido Research Organization
| | - Tomonori Azuma
- Forest Products Research Institute, Hokkaido Research Organization
| | | | | | - Teruyuki Matsumoto
- Fungus/Mushroom Resource and Research Center, Faculty of Agriculture, Tottori University
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Yoneyama S, Shirai N, Ando N, Azuma T, Tsuda M, Matsumoto T. Identification of a SNP and development of a PCR-based allele-specific marker of the sporulation-deficient (sporeless) trait of the Tamogitake 108Y2D mutant using next-generation sequencing. Breed Sci 2020; 70:530-539. [PMID: 33603548 PMCID: PMC7878937 DOI: 10.1270/jsbbs.20039] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 06/29/2020] [Indexed: 06/12/2023]
Abstract
The mass scattering of basidiospores during the cultivation of edible mushrooms causes serious problems, such as allergic reactions in workers. Sporulation-deficient (sporeless) cultivars would be very useful for preventing these issues. We aimed to identify the single-nucleotide polymorphism (SNP) that is responsible for the single dominant sporeless mutation of the Tamogitake 108Y2D mutant using next-generation sequencing (NGS) and TILLING technology and to develop an allele-specific PCR marker for sporeless breeding. By comparing the sequences of the wild-type and its mutant genomes, we identified 685 mutation loci in gene regions and pinpointed one SNP only consistent with sporeless phenotype for 105 segregants, i.e., a C to T located at position 1,950 of the exonic region of a putative fungal transcription factor that generated a stop codon. We developed an allele-specific marker based on the identified SNP, and its high practicality was validated using tests against progenies from several hybrids and wild isolates from different geographical origins. Thus, the allele-specific PCR marker developed here will be useful for marker-assisted selection in the breeding of the sporeless trait of this mushroom. Furthermore, the technical success of SNP identification and marker development based on NGS genome data can help achieve efficient mutation breeding in mushrooms.
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Affiliation(s)
- Shozo Yoneyama
- Forest Products Research Institute, Hokkaido Research Organization, 1-10 Nishikagura, Asahikawa, Hokkaido 071-0198, Japan
| | - Nobuki Shirai
- Fungus/Mushroom Resource and Research Center, Faculty of Agriculture, Tottori University, 4-101 Koyama Minami, Tottori 680-8553, Japan
| | - Natsumi Ando
- Fungus/Mushroom Resource and Research Center, Faculty of Agriculture, Tottori University, 4-101 Koyama Minami, Tottori 680-8553, Japan
| | - Tomonori Azuma
- Forest Products Research Institute, Hokkaido Research Organization, 1-10 Nishikagura, Asahikawa, Hokkaido 071-0198, Japan
| | - Mayumi Tsuda
- Forest Products Research Institute, Hokkaido Research Organization, 1-10 Nishikagura, Asahikawa, Hokkaido 071-0198, Japan
| | - Teruyuki Matsumoto
- Fungus/Mushroom Resource and Research Center, Faculty of Agriculture, Tottori University, 4-101 Koyama Minami, Tottori 680-8553, Japan
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9
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Igosawa R, Hirota A, Kimura N, Kuma S, Chartkunchand KC, Mishra PM, Lindley M, Yamaguchi T, Nakano Y, Azuma T. Photodissociation spectroscopy of N 2O + in the ion storage ring RICE. J Chem Phys 2020; 153:184305. [DOI: 10.1063/5.0027805] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- R. Igosawa
- Department of Physics, Saitama University, Saitama 338-8570, Japan
- Atomic, Molecular and Optical Physics Laboratory, RIKEN, Saitama 351-0198, Japan
| | - A. Hirota
- Department of Physics, Saitama University, Saitama 338-8570, Japan
- Atomic, Molecular and Optical Physics Laboratory, RIKEN, Saitama 351-0198, Japan
| | - N. Kimura
- Atomic, Molecular and Optical Physics Laboratory, RIKEN, Saitama 351-0198, Japan
| | - S. Kuma
- Atomic, Molecular and Optical Physics Laboratory, RIKEN, Saitama 351-0198, Japan
| | - K. C. Chartkunchand
- Atomic, Molecular and Optical Physics Laboratory, RIKEN, Saitama 351-0198, Japan
| | - P. M. Mishra
- Atomic, Molecular and Optical Physics Laboratory, RIKEN, Saitama 351-0198, Japan
| | - M. Lindley
- Atomic, Molecular and Optical Physics Laboratory, RIKEN, Saitama 351-0198, Japan
- Department of Materials and Life Sciences, Sophia University, Tokyo 102-8554, Japan
| | - T. Yamaguchi
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - Y. Nakano
- Atomic, Molecular and Optical Physics Laboratory, RIKEN, Saitama 351-0198, Japan
- Department of Physics, Rikkyo University, Tokyo 171-8501, Japan
| | - T. Azuma
- Atomic, Molecular and Optical Physics Laboratory, RIKEN, Saitama 351-0198, Japan
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10
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Kayama M, Chen JF, Nakada T, Nishimura Y, Shikanai T, Azuma T, Miyashita H, Takaichi S, Kashiyama Y, Kamikawa R. A non-photosynthetic green alga illuminates the reductive evolution of plastid electron transport systems. BMC Biol 2020; 18:126. [PMID: 32938439 PMCID: PMC7495860 DOI: 10.1186/s12915-020-00853-w] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 08/21/2020] [Indexed: 11/12/2022] Open
Abstract
Background Plastid electron transport systems are essential not only for photosynthesis but also for dissipating excess reducing power and sinking excess electrons generated by various redox reactions. Although numerous organisms with plastids have lost their photoautotrophic lifestyles, there is a spectrum of known functions of remnant plastids in non-photosynthetic algal/plant lineages; some of non-photosynthetic plastids still retain diverse metabolic pathways involving redox reactions while others, such as apicoplasts of apicomplexan parasites, possess highly reduced sets of functions. However, little is known about underlying mechanisms for redox homeostasis in functionally versatile non-photosynthetic plastids and thus about the reductive evolution of plastid electron transport systems. Results Here we demonstrated that the central component for plastid electron transport systems, plastoquinone/plastoquinol pool, is still retained in a novel strain of an obligate heterotrophic green alga lacking the photosynthesis-related thylakoid membrane complexes. Microscopic and genome analyses revealed that the Volvocales green alga, chlamydomonad sp. strain NrCl902, has non-photosynthetic plastids and a plastid DNA that carries no genes for the photosynthetic electron transport system. Transcriptome-based in silico prediction of the metabolic map followed by liquid chromatography analyses demonstrated carotenoid and plastoquinol synthesis, but no trace of chlorophyll pigments in the non-photosynthetic green alga. Transient RNA interference knockdown leads to suppression of plastoquinone/plastoquinol synthesis. The alga appears to possess genes for an electron sink system mediated by plastid terminal oxidase, plastoquinone/plastoquinol, and type II NADH dehydrogenase. Other non-photosynthetic algae/land plants also possess key genes for this system, suggesting a broad distribution of an electron sink system in non-photosynthetic plastids. Conclusion The plastoquinone/plastoquinol pool and thus the involved electron transport systems reported herein might be retained for redox homeostasis and might represent an intermediate step towards a more reduced set of the electron transport system in many non-photosynthetic plastids. Our findings illuminate a broadly distributed but previously hidden step of reductive evolution of plastid electron transport systems after the loss of photosynthesis.
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Affiliation(s)
- Motoki Kayama
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida nihonmatsu cho, Sakyo ku, Kyoto, Kyoto, 606-8501, Japan
| | - Jun-Feng Chen
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida nihonmatsu cho, Sakyo ku, Kyoto, Kyoto, 606-8501, Japan
| | - Takashi Nakada
- Institute for Advanced Biosciences, Keio University, Tsuruoka, Japan
| | | | | | - Tomonori Azuma
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida nihonmatsu cho, Sakyo ku, Kyoto, Kyoto, 606-8501, Japan
| | - Hideaki Miyashita
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida nihonmatsu cho, Sakyo ku, Kyoto, Kyoto, 606-8501, Japan
| | - Shinichi Takaichi
- Department of Molecular Microbiology, Tokyo University of Agriculture, Tokyo, Japan
| | - Yuichiro Kashiyama
- Graduate School of Engineering, Fukui University of Technology, Fukui, Japan
| | - Ryoma Kamikawa
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida nihonmatsu cho, Sakyo ku, Kyoto, Kyoto, 606-8501, Japan. .,Graduate School of Agriculture, Kyoto University, Kitashirakawa oiwake cho, Sakyo ku, Kyoto, Kyoto, 606-8502, Japan.
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11
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Chen FQ, Kono N, Suzuki R, Furukawa T, Tanuma H, Ferrari P, Azuma T, Matsumoto J, Shiromaru H, Zhaunerchyk V, Hansen K. Radiative cooling of cationic carbon clusters, C N+, N = 8, 10, 13-16. Phys Chem Chem Phys 2019; 21:1587-1596. [PMID: 30620033 DOI: 10.1039/c8cp06368k] [Citation(s) in RCA: 5] [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: 12/18/2022]
Abstract
The radiative cooling of highly excited carbon cluster cations of sizes N = 8, 10, 13-16 has been studied in an electrostatic storage ring. The cooling rate constants vary with cluster size from a maximum at N = 8 of 2.6 × 104 s-1 and a minimum at N = 13 of 4.4 × 103 s-1. The high rates indicate that photon emission takes place from electronically excited ions, providing a strong stabilizing cooling of the molecules.
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Affiliation(s)
- F-Q Chen
- School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
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12
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Miyake T, Kato K, Akiyama S, Azuma T, Yamamoto K, Kojima K, Nagaoka K, Shiraki K, Fujimoto A, Sato T, Kumagai T. Microstructure of new lithium-disilicate CAD/CAM block. Dent Mater 2019. [DOI: 10.1016/j.dental.2019.08.050] [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: 10/25/2022]
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13
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Menk S, Bertier P, Enomoto Y, Masunaga T, Majima T, Nakano Y, Azuma T. A cryogenic linear ion trap beamline for providing keV ion bunches. Rev Sci Instrum 2018; 89:113110. [PMID: 30501304 DOI: 10.1063/1.5051044] [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: 08/05/2018] [Accepted: 10/23/2018] [Indexed: 06/09/2023]
Abstract
A new cryogenic linear ion trap beamline has been constructed and commissioned, which serves to inject cold molecular and cluster ions into the RIKEN cryogenic electrostatic ring (RICE). Ions are created with an electrospray ion source, and a quadrupole mass filter is used for mass-selection prior to trap injection. The radio frequency octupole ion trap can be continuously loaded with ions and features a fast ion extraction mode to create short ion bunches with tens of μs duration. We report here on the simulations and development of the ion trap beamline and validate performance with the moderately heavy molecular cation methylene blue. Characterization of the novel trap design with additional wedge-shaped electrodes was carried out, which includes the determination of the temporal and spatial shape of the ion bunch and the total number of ions after extraction. Finally, these ion bunches are synchronized with the switching of a pulsed high-voltage acceleration device downstream of the trap, where the ions obtain a kinetic energy of up to 20 keV. The preparation and control of the keV ion beam are demonstrated for the ion injection into RICE.
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Affiliation(s)
- S Menk
- AMO Physics Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
| | - P Bertier
- AMO Physics Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
| | - Y Enomoto
- AMO Physics Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
| | - T Masunaga
- AMO Physics Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
| | - T Majima
- Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - Y Nakano
- AMO Physics Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
| | - T Azuma
- AMO Physics Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
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14
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Kamikawa R, Azuma T, Ishii KI, Matsuno Y, Miyashita H. Diversity of Organellar Genomes in Non-photosynthetic Diatoms. Protist 2018; 169:351-361. [PMID: 29803116 DOI: 10.1016/j.protis.2018.04.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 04/17/2018] [Accepted: 04/19/2018] [Indexed: 12/22/2022]
Abstract
We determined the complete sequences of the plastid and mitochondrial genomes of three non-photosynthetic Nitzschia spp., as well as those of a photosynthetic close relative, Nitzschia palea. All the plastid genomes and the three mitochondrial genomes determined were found to be circularly mapping, and the other mitochondrial genomes were predicted to be of a linear form with telomere-like structures at both ends. We found that all the non-photosynthetic plastid genomes are streamlined and lack a common gene set: two RNA genes, and 60 protein-coding genes, most of which are related to photosynthetic functions. Nevertheless, the non-photosynthetic plastid genomes commonly retain ATP synthase complex genes, although atpE is missing in Nitzschia sp. NIES-3581 and three other non-photosynthetic species lack atpF instead of atpE. This observation suggests an evolutionary constraint against the loss of ATP synthase complex genes. All the non-photosynthetic diatom plastid genomes lacked two genes, thiS and thiG, involved in thiamin biosynthesis. Consistent with this gene loss, non-photosynthetic Nitzschia spp. were incapable of thriving in vitamin B1-lacking media. This study clearly demonstrated not only the evolutionary trends of plastid genome reduction but also the linkage between plastid genome reduction and a biological change of nutrient requirements in Nitzschia.
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Affiliation(s)
- Ryoma Kamikawa
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida Nihonmatsu cho, Sakyo ku, Kyoto, Kyoto 606-8501, Japan.
| | - Tomonori Azuma
- Faculty of Integrated Human Studies, Kyoto University, Yoshida Nihonmatsu cho, Sakyo ku, Kyoto, Kyoto 606-8501, Japan
| | - Ken-Ichiro Ishii
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida Nihonmatsu cho, Sakyo ku, Kyoto, Kyoto 606-8501, Japan
| | - Yusei Matsuno
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida Nihonmatsu cho, Sakyo ku, Kyoto, Kyoto 606-8501, Japan
| | - Hideaki Miyashita
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida Nihonmatsu cho, Sakyo ku, Kyoto, Kyoto 606-8501, Japan
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15
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Hisanaga Y, Suzuki E, Aoki H, Sato M, Saito A, Saito A, Azuma T. Effect of the combined use of enamel matrix derivative and atelocollagen sponge scaffold on osteoblastic differentiation of mouse induced pluripotent stem cells in vitro. J Periodontal Res 2017; 53:240-249. [PMID: 29044527 DOI: 10.1111/jre.12511] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/07/2017] [Indexed: 12/16/2022]
Abstract
BACKGROUND AND OBJECTIVE Induced pluripotent stem cells (iPSCs) are a candidate cell source in periodontal regenerative therapy. Enamel matrix derivative (EMD) has been shown to regenerate periodontal tissues, and atelocollagen sponge (ACS) is considered a suitable scaffold or carrier for growth factors. This study aimed to investigate the effect of combined use of EMD and an ACS scaffold on cell behaviors and differentiation of mouse iPSCs (miPSCs) in vitro. MATERIAL AND METHODS Following embryonic body formation from miPSCs, dissociated cells (miPS-EB-derived cells) were seeded onto ACS with or without EMD, and cultured in osteoblast differentiation medium. Scanning electron microscopy and histological analyses were used to assess cell morphology and infiltration within the ACS. Cell viability (metabolism) was determined using an MTS assay, and expression of mRNA of osteoblastic differentiation markers was assessed by quantitative RT -PCR. Alkaline phosphatase (ALP) staining intensity and activity were evaluated. Mineralization was assessed by von Kossa staining, and calcium content was quantitated using the methylxylenol blue method. RESULTS By 24 hours after seeding, miPS-EB-derived cells in both the EMD and control groups had attached to and infiltrated the ACS scaffold. Scanning electron microscopy images revealed that by day 14, many cytoplasmic protrusions and extracellular deposits, suggestive of calcified matrix, were present in the EMD group. There was a time-dependent increase in cell viability up to day 3, but no difference between groups was observed at any time point. The levels expressed of ALP and osterix genes were significantly higher in the EMD group than in the control group. Expression of runt-related transcription factor 2 was increased in the EMD group compared with the control group on day 7. EMD upregulated the expression of bone sialoprotein and osteopontin on day 14, whereas expression of osteocalcin was lower at all time points. The staining intensity and activity of ALP were higher in the EMD group than in the control group. Mineralization levels and calcium contents were significantly higher in the EMD group throughout the observation period. CONCLUSION These data suggest that combining ACS with EMD increases levels of osteoblastic differentiation and mineralization in miPS-EB-derived cells, compared with ACS used alone.
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Affiliation(s)
- Y Hisanaga
- Department of Periodontology, Tokyo Dental College, Tokyo, Japan
| | - E Suzuki
- Department of Periodontology, Tokyo Dental College, Tokyo, Japan
| | - H Aoki
- Department of Periodontology, Tokyo Dental College, Tokyo, Japan
| | - M Sato
- Department of Periodontology, Tokyo Dental College, Tokyo, Japan
| | - A Saito
- Department of Biochemistry, Tokyo Dental College, Tokyo, Japan.,Oral Health Science Center, Tokyo Dental College, Tokyo, Japan
| | - A Saito
- Department of Periodontology, Tokyo Dental College, Tokyo, Japan.,Oral Health Science Center, Tokyo Dental College, Tokyo, Japan
| | - T Azuma
- Department of Biochemistry, Tokyo Dental College, Tokyo, Japan.,Oral Health Science Center, Tokyo Dental College, Tokyo, Japan
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16
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Nishihira J, Sato M, Tanaka A, Okamatsu M, Azuma T, Tsutsumi N, Yoneyama S. Maitake mushrooms (Grifola frondosa) enhances antibody production in response to influenza vaccination in healthy adult volunteers concurrent with alleviation of common cold symptoms. FFHD 2017. [DOI: 10.31989/ffhd.v7i7.363] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Background: The prevention of influenza virus infection is a critical public health challenge.Thus new, safe, and effective strategies are needed to reduce the risk of infection. Maitake mushrooms (Grifola frondosa) are popular in Asia for their flavor and immune-stimulating properties. In this study, we examined whether the dietary consumption of Maitake was effective in boosting the potency of influenza virus vaccination.Methods: We set up a double-blind, placebo-controlled clinical trial (n=50 subjects for Maitake consumption; n=50 for placebo) and analyzed hemagglutination inhibition (HI) antibody titers in response to trivalent influenza vaccine (type A H1N1, H3N2, and type B BX-51B) for a 12-week period of daily Maitake intake (6.825g), beginning 4 weeks before and continuing 8 weeks after vaccination. We also evaluated the efficacy of Maitake for suppression of common cold symptoms by questionnaire.Results: We found that continuous Maitake intake raised HI titers against influenza type A virus H1N1 and type B virus, and significantly increased the seroconversion rate for older adults (>60 years of age). Additionally, severe cold symptoms including rhinorrhea and headache were significantly improved by Maitake intake.Conclusion: In this clinical trial, we demonstrated that Maitake intake enhanced antibody production in response to influenza vaccination while simultaneously suppressing multiple common cold symptoms. The current results suggest that Maitake may activate both innate and adaptive immune responses for the prevention of virus infection. In conclusion, we expect that Maitake intake potentiates host defense systems and has a protective effect against influenza virus and other pathogenic viruses and bacteria.Keywords: clinical trial, Grifola frondosa, influenza, Maitake, vaccine
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Nobutani K, Sawada D, Fujiwara S, Kuwano Y, Nishida K, Nakayama J, Kutsumi H, Azuma T, Rokutan K. The effects of administration of the Lactobacillus gasseri strain CP2305 on quality of life, clinical symptoms and changes in gene expression in patients with irritable bowel syndrome. J Appl Microbiol 2017; 122:212-224. [PMID: 27761980 DOI: 10.1111/jam.13329] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [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: 08/02/2016] [Revised: 09/30/2016] [Accepted: 10/15/2016] [Indexed: 12/12/2022]
Abstract
AIMS To clarify the effects of Lactobacillus gasseri CP2305 (CP2305) on quality of life and clinical symptoms and its functional mechanisms in patients with irritable bowel syndrome (IBS). METHODS AND RESULTS After the patients were administered CP2305 daily for 4 weeks, the IBS-severity index score was significantly improved compared with that of the placebo group, and this improvement was accompanied by a reduction in health-related worry and changes in intestinal microbiota. The gene expression profiling of the peripheral blood leucocytes showed that CP2305 treatment significantly up-regulated genes related to eukaryotic initiation factor 2 (EIF2) signalling. Eighty-two genes were down-regulated in IBS patients compared with healthy controls. The expression of 23 of these genes exhibited a CP2305-dependent increase associated with an improvement in IBS severity. The majority of the restored genes were related to EIF2 signalling. CONCLUSIONS CP2305 administration is a potential candidate therapeutic option for patients with IBS. SIGNIFICANCE AND IMPACT OF THE STUDY Although probiotics have been proposed to benefit IBS patients, objective clinical evidence and elucidation of the functional mechanism remain insufficient. Our study demonstrated that CP2305 administration beneficially influences IBS patients in both subjective and objective evaluations, and gene expression profiling provided insights into the functional mechanism.
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Affiliation(s)
- K Nobutani
- Department of Gastroenterology, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
| | - D Sawada
- Research & Development Center, Asahi Group Holdings, Ltd, Sagamihara, Kanagawa, Japan
| | - S Fujiwara
- Research & Development Center, Asahi Group Holdings, Ltd, Sagamihara, Kanagawa, Japan
| | - Y Kuwano
- Department of Pathophysiology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - K Nishida
- Department of Pathophysiology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - J Nakayama
- Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - H Kutsumi
- Department of Gastroenterology, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
| | - T Azuma
- Department of Gastroenterology, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
| | - K Rokutan
- Department of Pathophysiology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
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Ishijima A, Minamihata K, Yamaguchi S, Yamahira S, Ichikawa R, Kobayashi E, Iijima M, Shibasaki Y, Azuma T, Nagamune T, Sakuma I. Selective intracellular vaporisation of antibody-conjugated phase-change nano-droplets in vitro. Sci Rep 2017; 7:44077. [PMID: 28333127 PMCID: PMC5363066 DOI: 10.1038/srep44077] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [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: 10/21/2016] [Accepted: 01/31/2017] [Indexed: 12/25/2022] Open
Abstract
While chemotherapy is a major mode of cancer therapeutics, its efficacy is limited by systemic toxicities and drug resistance. Recent advances in nanomedicine provide the opportunity to reduce systemic toxicities. However, drug resistance remains a major challenge in cancer treatment research. Here we developed a nanomedicine composed of a phase-change nano-droplet (PCND) and an anti-cancer antibody (9E5), proposing the concept of ultrasound cancer therapy with intracellular vaporisation. PCND is a liquid perfluorocarbon nanoparticle with a liquid–gas phase that is transformable upon exposure to ultrasound. 9E5 is a monoclonal antibody targeting epiregulin (EREG). We found that 9E5-conjugated PCNDs are selectively internalised into targeted cancer cells and kill the cells dynamically by ultrasound-induced intracellular vaporisation. In vitro experiments show that 9E5-conjugated PCND targets 97.8% of high-EREG-expressing cancer cells and kills 57% of those targeted upon exposure to ultrasound. Furthermore, direct observation of the intracellular vaporisation process revealed the significant morphological alterations of cells and the release of intracellular contents.
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Affiliation(s)
- A Ishijima
- Department of Precision Engineering, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - K Minamihata
- Department of Applied Chemistry, Kyushu University, Fukuoka 819-0395, Japan.,Department of Chemistry &Biotechnology, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - S Yamaguchi
- Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo 153-8904, Japan
| | - S Yamahira
- Department of Chemistry &Biotechnology, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - R Ichikawa
- Department of Precision Engineering, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - E Kobayashi
- Department of Precision Engineering, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - M Iijima
- Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo 153-8904, Japan
| | - Y Shibasaki
- Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo 153-8904, Japan
| | - T Azuma
- Center for Disease Biology and Integrative Medicine, The University of Tokyo, Tokyo 113-8656, Japan
| | - T Nagamune
- Department of Chemistry &Biotechnology, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan.,Department of Bioengineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - I Sakuma
- Department of Precision Engineering, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan.,Department of Bioengineering, The University of Tokyo, Tokyo 113-8656, Japan.,Medical Device Development and Regulation Research Center, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
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Nakano Y, Enomoto Y, Masunaga T, Menk S, Bertier P, Azuma T. Design and commissioning of the RIKEN cryogenic electrostatic ring (RICE). Rev Sci Instrum 2017; 88:033110. [PMID: 28372443 DOI: 10.1063/1.4978454] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A new electrostatic ion storage ring, the RIKEN cryogenic electrostatic ring, has been commissioned with a 15-keV ion beam under cryogenic conditions. The ring was designed with a closed ion beam orbit of about 2.9 m, where the ion beam is guided entirely by electrostatic components. The vacuum chamber of the ring is cooled using a liquid-He-free cooling system to 4.2 K with a temperature difference of 0.4 K at most within all the positions measured by calibrated silicon diode sensors. The first cryogenic operation with a 15-keV Ne+ beam was successfully performed in August 2014. During the measurement, the Ne+ beam was stored under a ring temperature of 4.2 K with a residual-gas lifetime of more than 10 min. This permits an estimation of the residual gas density at a few 104 cm-3, which corresponds to a room-temperature-equivalent pressure of around 1×10-10 Pa. An effect of longitudinal pulse compression at the bunching cavity in the ring was clearly identified by monitoring the pick-up beam detector. The detailed design and mechanical structure of the storage ring, as well as the results from the commissioning run, are reported.
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Affiliation(s)
- Y Nakano
- AMO Physics Laboratory, RIKEN, 351-0198 Saitama, Japan
| | - Y Enomoto
- AMO Physics Laboratory, RIKEN, 351-0198 Saitama, Japan
| | - T Masunaga
- AMO Physics Laboratory, RIKEN, 351-0198 Saitama, Japan
| | - S Menk
- AMO Physics Laboratory, RIKEN, 351-0198 Saitama, Japan
| | - P Bertier
- AMO Physics Laboratory, RIKEN, 351-0198 Saitama, Japan
| | - T Azuma
- AMO Physics Laboratory, RIKEN, 351-0198 Saitama, Japan
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20
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Azuma T, Kumagai T, Sato T, Mashio G, Fujimoto T, Akiyama S, Yokohara H, Hoshino T, Miyake T. Evaluation of machinable lithium disilicate glass ceramic block for CAD/CAM. Dent Mater 2017. [DOI: 10.1016/j.dental.2017.08.012] [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: 10/18/2022]
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21
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Ioka T, Fukutomi A, Mizusawa J, Katayama H, Nakamura S, Ito Y, Hiraoka N, Ueno M, Ikeda M, Sugimori K, Shimizu K, Okusaka T, Ozaka M, Yanagimoto H, Nakamori S, Azuma T, Hosokawa A, Sata N, Mine T, Furuse J. Randomized phase II study of S-1 and concurrent radiotherapy with versus without induction chemotherapy of gemcitabine for locally advanced pancreatic cancer (LAPC): Final analysis of JCOG1106. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw371.13] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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22
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Nakayama I, Shinozaki E, Azuma T, Wakatsuki T, Ogura M, Ichimura T, Ozaka M, Takahari D, Chin K, Mizunuma N. 164P Does patient selection according to RAS/PIK3CA/BRAF mutational status enrich the efficacy of adjuvant chemotherapy for Stage IV CRC after R0 resection? Ann Oncol 2015. [DOI: 10.1093/annonc/mdv523.25] [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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23
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Oda M, Azuma T, Watanabe N, Nishizaki Y, Nishida J, Ishii K, Suzuki H, Kaneko H, Komatsu H, Tsukada N, Tsuchiya M. Regulatory Mechanism of Hepatic Microcirculation: Involvement of the Contraction and Dilatation of Sinusoids and Sinusoidal Endothelial Fenestrae1. Progress in Applied Microcirculation 2015. [DOI: 10.1159/000418654] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Mizutani S, Ekuni D, Tomofuji T, Yamane M, Azuma T, Iwasaki Y, Morita M. Gingival condition and tooth-brushing behavior after alcohol consumption. J Periodontal Res 2014; 50:494-9. [PMID: 25251783 DOI: 10.1111/jre.12233] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/17/2014] [Indexed: 12/29/2022]
Affiliation(s)
- S. Mizutani
- Department of Preventive Dentistry; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences; Okayama Japan
| | - D. Ekuni
- Department of Preventive Dentistry; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences; Okayama Japan
| | - T. Tomofuji
- Department of Preventive Dentistry; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences; Okayama Japan
- Advanced Research Center for Oral and Craniofacial Sciences; Okayama University Dental School; Okayama Japan
| | - M. Yamane
- Department of Preventive Dentistry; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences; Okayama Japan
| | - T. Azuma
- Department of Preventive Dentistry; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences; Okayama Japan
| | - Y. Iwasaki
- Health Service Center; Okayama University; Okayama Japan
| | - M. Morita
- Department of Preventive Dentistry; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences; Okayama Japan
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Isohisa A, Tsugihashi Y, Sasai T, Azuma T, Sada R, Yamamoto Y, Yamaguchi T, Fukuhara S. AB0563 Relationship between Readmission and Corticosteroid Doses in Patients with Antineutrophil Cytoplasmic Antibody-Associated Vasculitis. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.1586] [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: 11/03/2022]
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26
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Ito G, Furukawa T, Tanuma H, Matsumoto J, Shiromaru H, Majima T, Goto M, Azuma T, Hansen K. Cooling dynamics of photoexcited C6(-) and C6H(-). Phys Rev Lett 2014; 112:183001. [PMID: 24856693 DOI: 10.1103/physrevlett.112.183001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Indexed: 05/16/2023]
Abstract
We report conclusive evidence of an efficient cooling mechanism via the electronic radiative transitions of hot small molecular anions isolated in vacuum. We stored C6(-) and C6H(-) in an ion storage ring and observed laser-induced electron detachment with delays up to several milliseconds. The terminal hydrogen atom caused a drastic change in the decay profiles. The decay of photoexcited C6H(-) is slow and nonexponential, which can be explained by depletion cooling, whereas that for C6(-) occurs extremely fast, on a time scale below 0.1 ms and can only be explained by electronic radiative cooling via low-lying electronic excited states.
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Affiliation(s)
- G Ito
- Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - T Furukawa
- Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - H Tanuma
- Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - J Matsumoto
- Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - H Shiromaru
- Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - T Majima
- Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan and Quantum Science and Engineering Center, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - M Goto
- Atomic, Molecular and Optical Physics Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
| | - T Azuma
- Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan and Atomic, Molecular and Optical Physics Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
| | - K Hansen
- Department of Physics, University of Gothenburg, 41296 Gothenburg, Sweden
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Mizutani S, Ekuni D, Tomofuji T, Azuma T, Kataoka K, Yamane M, Iwasaki Y, Morita M. Relationship between xerostomia and gingival condition in young adults. J Periodontal Res 2014; 50:74-9. [PMID: 24697562 DOI: 10.1111/jre.12183] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/24/2014] [Indexed: 11/30/2022]
Abstract
BACKGROUND AND OBJECTIVE Xerostomia is a subjective symptom of dryness in the mouth. Although a correlation between xerostomia and oral conditions in the elderly has been reported, there are few such studies in the young adults. The aim of this study was to examine the relationship of xerostomia with the gingival condition in university students. MATERIAL AND METHODS A total of 2077 students (1202 male subjects and 875 female subjects), 18-24 years of age, were examined. The disease activity and severity of the gingival condition were assessed as the percentage of teeth with bleeding on probing (%BOP) and the presence of teeth with probing pocket depth of ≥ 4 mm, respectively. Additional information on xerostomia, oral health behaviors, coffee/tea intake and nasal congestion was collected via a questionnaire. Path analysis was used to test pathways from xerostomia to the gingival condition. RESULTS One-hundred and eighty-three (8.8%) students responded that their mouths frequently or always felt dry. Xerostomia was related to %BOP and dental plaque formation, but was not related to the presence of probing pocket depth ≥ 4 mm. In the structural model, xerostomia was related to dental plaque formation (p < 0.01), and a lower level of dental plaque formation was associated with a lower %BOP. Xerostomia was associated with coffee/tea intake (p < 0.01) and nasal congestion (p < 0.001). CONCLUSION Xerostomia was indirectly related to gingival disease activity through the accumulation of dental plaque. Nasal congestion and coffee/tea intake also affected xerostomia. These findings suggest that xerostomia should be considered in screening for gingivitis risk in young adults.
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Affiliation(s)
- S Mizutani
- Department of Preventive Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Kita-ku, Okayama, Japan
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Najafian K, Pettersson MS, Dynefors B, Shiromaru H, Matsumoto J, Tanuma H, Furukawa T, Azuma T, Hansen K. Radiative cooling of C7−. J Chem Phys 2014; 140:104311. [DOI: 10.1063/1.4867499] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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29
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Azuma T, Yokoi Y, Yamazaki K. Corrigendum to 'The next generation of fenestrated endografts: results of a clinical trial to support an expanded indication for aortic arch aneurysm treatment' [Eur J Cardiothorac Surg 2013;44:e156-63]. Eur J Cardiothorac Surg 2014. [DOI: 10.1093/ejcts/ezt625] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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30
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Matsumura N, Azuma T, Hori Y, Fujita K, Tsugihashi Y, Sada R, Ishimaru H, Yamanaka K, Kobashi Y, Hatta K. Primary Angiosarcoma of the Aorta Found by EMBOLI of Left Femoral Artery: A Case Report. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt460.32] [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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31
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Shingaki M, Azuma T, Yokoi Y, Yamazaki K. 201 * THE EFFICACY OF TRANEXAMIC ACID FOR TYPE 2 ENDOLEAK AFTER ENDOVASCULAR TREATMENT FOR AORTIC ANEURYSM. Interact Cardiovasc Thorac Surg 2013. [DOI: 10.1093/icvts/ivt372.201] [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: 11/15/2022] Open
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32
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Goto M, Sundén AEK, Shiromaru H, Matsumoto J, Tanuma H, Azuma T, Hansen K. Direct observation of internal energy distributions of C5−. J Chem Phys 2013; 139:054306. [DOI: 10.1063/1.4817196] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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33
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Matsutani T, Li Y, Murakami M, Lee HM, Aoki C, Sekiguchi M, Matsui K, Kitano M, Namiki M, Ohmura K, Murakami K, Fujii T, Kuroiwa T, Shimaoka Y, Nakahara H, Maeda K, Irimajiri S, Funauchi M, Imura Y, Ikawa T, Nanpei A, Azuma T, Sasaki T, Yokota A, Kawahito Y, Mimori T, Sano H, Nishimoto N. FRI0206 Abatacept (CTLA4-IG) suppresses T cell activation and reduces TH17 cells as well as plasma IL-6 in patients with rheumatoid arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2663] [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: 11/04/2022]
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34
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Matsutani T, Murakami M, Sekiguchi M, Matsui K, Kitano M, Namiki M, Ohmura K, Imura Y, Fujii T, Kuroiwa T, Nakahara H, Hika S, Maeda K, Nozaki Y, Funauchi M, Murakami K, Ikawa T, Irimajiri S, Nampei A, Azuma T, Sasaki T, Yokota A, Morita S, Kawahito Y, Mimori T, Sano H, Nishimoto N. SAT0101 Abatacept Treatment Suppresses T Cell Activation in Anti-Cyclic Citrullinated Peptide Antibody (ACPA) Positive RA Patients but not in Acpa Negative RA Patients. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.1827] [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: 11/04/2022]
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35
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Murakami M, Matsutani T, Sekiguchi M, Matsui K, Kitano M, Namiki M, Ohmura K, Imura Y, Fujii T, Kuroiwa T, Nakahara H, Higa S, Maeda K, Nozaki Y, Funauchi M, Murakami K, Ikawa T, Irimajiri S, Nampei A, Azuma T, Sasaki T, Yokota A, Morita S, Kawahito Y, Mimori T, Sano H, Nishimoto N. SAT0121 Changes in Cytokine Profiles in Rheumatoid Arthritis Patients During Abatacept Treatment. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.1847] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Yoneda T, Tomofuji T, Ekuni D, Azuma T, Endo Y, Kasuyama K, Machida T, Morita M. Anti-aging Effects of Co-enzyme Q10 on Periodontal Tissues. J Dent Res 2013; 92:735-9. [DOI: 10.1177/0022034513490959] [Citation(s) in RCA: 16] [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: 01/06/2023] Open
Abstract
Oxidative stress is associated with age-related reactions. The anti-oxidative effects of a reduced form of co-enzyme Q10 (rCoQ10) suppress oxidative stress, which may contribute to the prevention of age-related inflammatory reactions. We examined the effects of topically applied rCoQ10 on periodontal inflammatory reactions in a rat aging model. Male Fischer 344 rats, 2 (n = 6) and 4 mos (n = 18) of age, were used. All of the two-month-old rats and 6 of the four-month-old rats were sacrificed and 12 remaining four-month-old rats received topically applied ointment with or without 1% rCoQ10 on the gingival surface until they reached 6 mos of age. The rats showed an age-dependent increase in circulating oxidative stress. RCoQ10 decreased oxidative DNA damage and tartrate-resistant acid-phosphatase-positive osteoclasts in the periodontal tissue at 6 mos of age as compared with the control. The same conditions lowered gene expression of caspase-1 and interleukin-1β in the periodontal tissue. Furthermore, Nod-like receptor protein 3 inflammasomes were less activated in periodontal tissues from rCoQ10-treated rats as compared with the control rats. Our results suggest that rCoQ10 suppresses age-related inflammatory reactions and osteoclast differentiation by inhibiting oxidative stress.
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Affiliation(s)
- T. Yoneda
- Department of Preventive Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
| | - T. Tomofuji
- Department of Preventive Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
| | - D. Ekuni
- Department of Preventive Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
| | - T. Azuma
- Department of Preventive Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
| | - Y. Endo
- Department of Preventive Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
| | - K. Kasuyama
- Department of Preventive Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
| | - T. Machida
- Department of Preventive Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
| | - M. Morita
- Department of Preventive Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
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Azuma T, Yokoi Y, Yamazaki K. The next generation of fenestrated endografts: results of a clinical trial to support an expanded indication for aortic arch aneurysm treatment. Eur J Cardiothorac Surg 2013; 44:e156-63; discussion e163. [DOI: 10.1093/ejcts/ezt241] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Tanaka S, Toyonaga T, Obata D, Ishida T, Morita Y, Azuma T. Endoscopic double-layered suturing: a novel technique for closure of large mucosal defects after endoscopic mucosal resection (EMR) or endoscopic submucosal dissection (ESD). Endoscopy 2012; 44 Suppl 2 UCTN:E153-4. [PMID: 22622717 DOI: 10.1055/s-0031-1291673] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- S Tanaka
- Division of Gastroenterology, Department of Internal Medicine, Graduate School of Medicine, Kobe University, Hyogo, Japan
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Tomofuji T, Ekuni D, Azuma T, Irie K, Endo Y, Kasuyama K, Nagayama M, Morita M. Effects of electrical stimulation on periodontal tissue remodeling in rats. J Periodontal Res 2012; 48:177-83. [DOI: 10.1111/j.1600-0765.2012.01518.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/27/2012] [Indexed: 01/16/2023]
Affiliation(s)
- T. Tomofuji
- Department of Preventive Dentistry; Okayama University Graduate School of Medicine; Density and Pharmaceutical Sciences; Okayama; Japan
| | - D. Ekuni
- Department of Preventive Dentistry; Okayama University Graduate School of Medicine; Density and Pharmaceutical Sciences; Okayama; Japan
| | - T. Azuma
- Department of Preventive Dentistry; Okayama University Graduate School of Medicine; Density and Pharmaceutical Sciences; Okayama; Japan
| | - K. Irie
- Department of Preventive Dentistry; Okayama University Graduate School of Medicine; Density and Pharmaceutical Sciences; Okayama; Japan
| | - Y. Endo
- Department of Preventive Dentistry; Okayama University Graduate School of Medicine; Density and Pharmaceutical Sciences; Okayama; Japan
| | - K. Kasuyama
- Department of Preventive Dentistry; Okayama University Graduate School of Medicine; Density and Pharmaceutical Sciences; Okayama; Japan
| | - M. Nagayama
- Appliances Company; Panasonic Corporation; Osaka; Japan
| | - M. Morita
- Department of Preventive Dentistry; Okayama University Graduate School of Medicine; Density and Pharmaceutical Sciences; Okayama; Japan
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Saito M, Seo Y, Yano Y, Miki A, Momose K, Hirano H, Yoshida M, Azuma T. Letter: liver dysfunction and survival in hepatocellular carcinoma treated by transarterial chemoembolisation. Aliment Pharmacol Ther 2012; 35:861-2; author reply 862-3. [PMID: 22404417 DOI: 10.1111/j.1365-2036.2012.05021.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
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41
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Azuma T, Tobinai K, Takeyama K, Shibata T, Hidaka M, Kurosawa M, Kasai M, Chou T, Fukushima N, Mukai K, Tsukasaki K, Shimoyama M. Phase II Study of Intensive Post-remission Chemotherapy and Stem Cell Transplantation for Adult Acute Lymphoblastic Leukemia and Lymphoblastic Lymphoma: Japan Clinical Oncology Group Study, JCOG9402. Jpn J Clin Oncol 2012; 42:394-404. [DOI: 10.1093/jjco/hys029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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42
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Ben Suleiman Y, Yoshida M, Nishiumi S, Tanaka H, Mimura T, Nobutani K, Yamamoto K, Takenaka M, Aoganghua A, Miki I, Ota H, Takahashi S, Matsui H, Nakamura M, Blumberg RS, Azuma T. Neonatal Fc receptor for IgG (FcRn) expressed in the gastric epithelium regulates bacterial infection in mice. Mucosal Immunol 2012; 5:87-98. [PMID: 22089027 PMCID: PMC3964614 DOI: 10.1038/mi.2011.53] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Neonatal Fc receptors for immunoglobulin (Ig)G (FcRn) assume a central role in regulating host IgG levels and IgG transport across polarized epithelial barriers. We have attempted to elucidate the contribution of FcRn in controlling Helicobacter infection in the stomach. C57BL/6J wild-type or FcRn(-/-) mice were infected with Helicobacter heilmannii, and gastric lesions, bacterial load and the levels of antigen-specific IgG in serum and gastric juice were analyzed. The elevated levels of anti-H. heimannii IgG in gastric juice were observed exclusively in wild-type mice but not in FcRn(-/-) mice. In contrast, an increase in lymphoid follicles and bacterial loads along with deeper gastric epithelium invasion were noted in FcRn(-/-) mice. C57BL/6J wild-type or FcRn(-/-) mice were also infected with Helicobacter pylori SS1, and the results of the bacterial load in stomachs of these mice and the anti-H. pylori IgG levels in serum and gastric juice were similar to those from H. heilmannii infection. Our data suggest that FcRn can be functionally expressed in the stomach, which is involved in transcytosis of IgG, and prevent colonization by H. heilmannii and the associated pathological consequences of infection.
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Affiliation(s)
- Y Ben Suleiman
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.
| | - M Yoshida
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.
,The Integrated Center for Mass Spectrometry, Kobe University Graduate School of Medicine, Kobe, Japan.
,Division of Metabolomics Research, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.
| | - S Nishiumi
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.
| | - H Tanaka
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.
| | - T Mimura
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.
| | - K Nobutani
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.
| | - K Yamamoto
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.
| | - M Takenaka
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.
| | - A Aoganghua
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.
| | - I Miki
- Department of Medical Pharmaceutics, Kobe Pharmaceutical University, Kobe, Japan.
| | - H Ota
- Department of Biomedical Laboratory Sciences, School of Health Sciences, Shinshu University School of Medicine, Nagano, Japan.
| | - S Takahashi
- Third Department of Internal Medicine, Kyorin University, Tokyo, Japan.
| | - H Matsui
- Kitasato Institute for Life Sciences and Graduate School of Infection Control Sciences, Kitsato University, Tokyo, Japan.
| | - M Nakamura
- Center for Clinical Pharmacy and Clinical Sciences, School of Pharmaceutical Sciences, Kitasato University, Tokyo, Japan.
| | - RS Blumberg
- Division of Gastroenterology, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA.
| | - T Azuma
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.
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43
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Kasuyama K, Tomofuji T, Ekuni D, Azuma T, Irie K, Endo Y, Morita M. Effects of topical application of inorganic polyphosphate on tissue remodeling in rat inflamed gingiva. J Periodontal Res 2011; 47:159-64. [DOI: 10.1111/j.1600-0765.2011.01414.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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44
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Tsao SKK, Toyonaga T, Morita Y, Fujita T, Hayakumo T, Azuma T. Modified fishing-line traction system in endoscopic submucosal dissection of large esophageal tumors. Endoscopy 2011; 43 Suppl 2 UCTN:E119. [PMID: 21425004 DOI: 10.1055/s-0030-1256148] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- S K K Tsao
- Department of Gastroenterology, Tan Tock Seng Hospital, Singapore
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45
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Miwa H, Inoue K, Ashida K, Kogawa T, Nagahara A, Yoshida S, Tano N, Yamazaki Y, Wada T, Asaoka D, Fujita T, Tanaka J, Shimatani T, Manabe N, Oshima T, Haruma K, Azuma T, Yokoyama T. Randomised clinical trial: efficacy of the addition of a prokinetic, mosapride citrate, to omeprazole in the treatment of patients with non-erosive reflux disease - a double-blind, placebo-controlled study. Aliment Pharmacol Ther 2011; 33:323-32. [PMID: 21118395 DOI: 10.1111/j.1365-2036.2010.04517.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Proton pump inhibitors (PPIs) are less effective in non-erosive reflux disease (NERD) patients than in reflux oesophagitis patients. Whether the addition of prokinetics to PPIs improves NERD patients' symptoms remains unknown. AIM To evaluate the efficacy of mosapride in NERD patients when used with PPI. METHODS A total of 200 NERD patients were randomised to one of two arms: omeprazole (10 mg once daily) plus mosapride citrate (5 mg three times a day) (treatment arm) and omeprazole plus placebo (placebo arm). The primary endpoint was the rate of responders [visual analogue scale (VAS) was zero or <1 cm] after 4 weeks of treatment. The secondary endpoints were changes in the VAS score and the safety profile. RESULTS There was no significant difference between the rates of responders in both arms in intent-to-treat (ITT) and per-protocol (PP) analysis. The change in the VAS score in treatment arm was significantly better than placebo arm in PP analysis (-4.0 ± 0.2 and -3.3 ± 0.2, mean ± S.E.M.) (N.S. in ITT analysis). The rate of adverse events was similar in both groups. CONCLUSION The addition of mosapride to omeprazole was not more effective than omeprazole alone.
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Affiliation(s)
- H Miwa
- Hyogo College of Medicine, Nishinomiya, Japan.
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46
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Tanaka S, Toyonaga T, East J, Obata D, Fujiwara S, Wakahara C, Masuda A, Man-i M, Morita Y, Sanuki T, Fujita T, Yoshida M, Kutsumi H, Azuma T. Endoscopic retrieval method using a small grip-seal plastic bag for large colorectal resection specimens after endoscopic submucosal dissection. Endoscopy 2010; 42 Suppl 2:E186-7. [PMID: 20680918 DOI: 10.1055/s-0029-1244168] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- S Tanaka
- Division of Gastroenterology, Department of Internal Medicine, Graduate School of Medicine, Kobe University, Kobe, Hyogo, Japan
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47
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Furuta M, Tomofuji T, Ekuni D, Tamaki N, Yamamoto T, Azuma T, Irie K, Endo Y, Yamada S, Morita M. Relationship between periodontal condition and arterial properties in an adult population in Japan. Oral Dis 2010; 16:781-7. [DOI: 10.1111/j.1601-0825.2010.01688.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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48
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Abstract
AIM To investigate the characteristics of side population (SP) cells derived from the dental pulp of young and aged rats. METHODOLOGY Maxillary and mandibular incisors were extracted from 5-week-old (young) rats and 60- to 80-week-old (aged) rats. Coronal pulp tissue was removed mechanically, and single-cell suspensions were prepared using collagenase and dispase. Cells were stained with Hoechst 33342 and sorted with an fluorescence-activated cell sorter (FACS). Isolated SP and main population (MP) cells were analysed by real-time reverse transcription polymerase chain reaction, immunohistochemical localization and cell cycle determination. Two-way analysis of variance and the multiple comparison Scheffè test were used for statistical analysis (P<0.05). RESULTS Approximately 0.40% of pulp cells in young rats and 0.11% in aged rats comprised SP cells. SP cells expressed a higher mRNA level of ATP-binding cassette transporter G2 (ABCG2), but lower mRNA levels of nestin, alkaline phosphatase, p16 and p57 than MP cells in both age groups. Immunohistochemical observation revealed ABCG2-positive cells localized in the cell-rich zone and nestin in the odontoblastic layer in both groups. Furthermore, the majority of both young and aged SP and MP cells were in growth arrest of the G(0) /G(1) phase. CONCLUSION The FACS analysis revealed a decrease in the proportion of SP cells with age, whilst p16 mRNA expression indicated an increase in cell senescence. The cell cycles of SP and MP cells from both young and aged dental pulp were generally in the G0/G1 phase.
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Affiliation(s)
- M Kenmotsu
- Oral Health Science Center HRC7, Tokyo Dental Collage, Chiba, Japan
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49
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Toyonaga T, Man-I M, Fujita T, Nishino E, Ono W, Morita Y, Sanuki T, Masuda A, Yoshida M, Kutsumi H, Inokuchi H, Azuma T. The performance of a novel ball-tipped Flush knife for endoscopic submucosal dissection: a case-control study. Aliment Pharmacol Ther 2010. [PMID: 20839389 DOI: 10.1111/j.1365- 2036.2010.04425.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Endoscopic submucosal dissection (ESD) using short needle knives is safe and effective, but bleeding is a problem due to low haemostatic capability. AIM To assess the performance of a novel ball-tipped needle knife (Flush knife-BT) for ESD with particular emphasis on haemostasis. METHODS A case-control study to compare the performance for ESD of 30 pairs of consecutive early gastrointestinal lesions (oesophagus: 12, stomach: 32, colorectum: 16) with standard Flush knife (F) vs. Flush knife-BT (BT). Primary outcome was efficacy of intraprocedure haemostasis. Secondary outcomes included procedure time, procedure speed (dividing procedure time into the area of resected specimen), en bloc resection rate and recurrence rate. RESULTS Median intraoperative bleeding points and bleeding points requiring haemostatic forceps were smaller in the BT group than in the F group (4 vs. 8, P < 0.0001, 0 vs. 3, P < 0.0001). There was no difference between groups for procedure time; however, procedure speed was shorter in the BT group (P = 0.0078). En bloc and en bloc R0 resection rates were 100%, with no perforation or post-operative bleeding. No recurrence was observed in either group at follow-up 1 year postprocedure. CONCLUSIONS Ball-tipped Flush knife (Flush knife-BT) appears to improve haemostatic efficacy and dissection speed compared with standard Flush knife.
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Affiliation(s)
- T Toyonaga
- Department of Endoscopy, Kobe University Hospital, Japan.
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50
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Toyonaga T, Man-I M, Fujita T, Nishino E, Ono W, Morita Y, Sanuki T, Masuda A, Yoshida M, Kutsumi H, Inokuchi H, Azuma T. The performance of a novel ball-tipped Flush knife for endoscopic submucosal dissection: a case-control study. Aliment Pharmacol Ther 2010; 32:908-15. [PMID: 20839389 DOI: 10.1111/j.1365-2036.2010.04425.x] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Endoscopic submucosal dissection (ESD) using short needle knives is safe and effective, but bleeding is a problem due to low haemostatic capability. AIM To assess the performance of a novel ball-tipped needle knife (Flush knife-BT) for ESD with particular emphasis on haemostasis. METHODS A case-control study to compare the performance for ESD of 30 pairs of consecutive early gastrointestinal lesions (oesophagus: 12, stomach: 32, colorectum: 16) with standard Flush knife (F) vs. Flush knife-BT (BT). Primary outcome was efficacy of intraprocedure haemostasis. Secondary outcomes included procedure time, procedure speed (dividing procedure time into the area of resected specimen), en bloc resection rate and recurrence rate. RESULTS Median intraoperative bleeding points and bleeding points requiring haemostatic forceps were smaller in the BT group than in the F group (4 vs. 8, P < 0.0001, 0 vs. 3, P < 0.0001). There was no difference between groups for procedure time; however, procedure speed was shorter in the BT group (P = 0.0078). En bloc and en bloc R0 resection rates were 100%, with no perforation or post-operative bleeding. No recurrence was observed in either group at follow-up 1 year postprocedure. CONCLUSIONS Ball-tipped Flush knife (Flush knife-BT) appears to improve haemostatic efficacy and dissection speed compared with standard Flush knife.
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Affiliation(s)
- T Toyonaga
- Department of Endoscopy, Kobe University Hospital, Japan.
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