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Geringer JW, Katoh Y, Gonczy S, Burchell T, Mitchell M, Jenkins M, Windes W. Codes and standards for ceramic composite core materials for High Temperature Reactor applications. Nuclear Engineering and Design 2023. [DOI: 10.1016/j.nucengdes.2023.112158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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2
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Kawai A, Iwata S, Shimoi T, Kobayashi E, Ogura K, Yoshida A, Okuma H, Goto Y, Morizane C, Yoshida Y, Katoh Y, Yatabe Y, Yonemori K, Nakamura K, Nishida T, Higashi T. 126P Comprehensive efforts to address multifaceted issues of rare cancers and sarcomas in Japan. ESMO Open 2023. [DOI: 10.1016/j.esmoop.2023.101072] [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: 04/05/2023] Open
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3
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Kitamura N, Amano T, Omura Y, Boardsen SA, Gershman DJ, Miyoshi Y, Kitahara M, Katoh Y, Kojima H, Nakamura S, Shoji M, Saito Y, Yokota S, Giles BL, Paterson WR, Pollock CJ, Barrie AC, Skeberdis DG, Kreisler S, Le Contel O, Russell CT, Strangeway RJ, Lindqvist PA, Ergun RE, Torbert RB, Burch JL. Direct observations of energy transfer from resonant electrons to whistler-mode waves in magnetosheath of Earth. Nat Commun 2022; 13:6259. [PMID: 36307443 PMCID: PMC9616889 DOI: 10.1038/s41467-022-33604-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 09/22/2022] [Indexed: 11/30/2022] Open
Abstract
Electromagnetic whistler-mode waves in space plasmas play critical roles in collisionless energy transfer between the electrons and the electromagnetic field. Although resonant interactions have been considered as the likely generation process of the waves, observational identification has been extremely difficult due to the short time scale of resonant electron dynamics. Here we show strong nongyrotropy, which rotate with the wave, of cyclotron resonant electrons as direct evidence for the locally ongoing secular energy transfer from the resonant electrons to the whistler-mode waves using ultra-high temporal resolution data obtained by NASA’s Magnetospheric Multiscale (MMS) mission in the magnetosheath. The nongyrotropic electrons carry a resonant current, which is the energy source of the wave as predicted by the nonlinear wave growth theory. This result proves the nonlinear wave growth theory, and furthermore demonstrates that the degree of nongyrotropy, which cannot be predicted even by that nonlinear theory, can be studied by observations. Excitation of whistler-mode waves by cyclotron instability is considered as the likely generation process of the waves. Here, the authors show direct observational evidence for locally ongoing secular energy transfer from the resonant electrons to the whistler-mode waves in Earth’s magnetosheath.
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Affiliation(s)
- N Kitamura
- Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Japan. .,Department of Earth and Planetary Science, Graduate School of Science, the University of Tokyo, Tokyo, Japan.
| | - T Amano
- Department of Earth and Planetary Science, Graduate School of Science, the University of Tokyo, Tokyo, Japan
| | - Y Omura
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Japan
| | - S A Boardsen
- NASA Goddard Space Flight Center, Greenbelt, MD, USA.,Goddard Planetary Heliophysics Institute, University of Maryland, Baltimore County, MD, USA
| | - D J Gershman
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - Y Miyoshi
- Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Japan
| | - M Kitahara
- Department of Geophysics, Graduate school of Science, Tohoku University, Sendai, Japan
| | - Y Katoh
- Department of Geophysics, Graduate school of Science, Tohoku University, Sendai, Japan
| | - H Kojima
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Japan
| | - S Nakamura
- Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Japan
| | - M Shoji
- Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Japan
| | - Y Saito
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
| | - S Yokota
- Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Japan
| | - B L Giles
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - W R Paterson
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | | | - A C Barrie
- NASA Goddard Space Flight Center, Greenbelt, MD, USA.,Aurora Engineering, Potomac, MD, USA
| | - D G Skeberdis
- NASA Goddard Space Flight Center, Greenbelt, MD, USA.,a.i. solutions Inc, Lanham, MD, USA
| | - S Kreisler
- NASA Goddard Space Flight Center, Greenbelt, MD, USA.,Aurora Engineering, Potomac, MD, USA
| | - O Le Contel
- Laboratoire de Physique des Plasmas, CNRS/Sorbonne Université/Université Paris-Saclay/Observatoire de Paris/Ecole Polytechnique Institut Polytechnique de Paris, Paris, France
| | - C T Russell
- Department of Earth, Planetary, and Space Science, University of California, Los Angeles, CA, USA
| | - R J Strangeway
- Department of Earth, Planetary, and Space Science, University of California, Los Angeles, CA, USA
| | | | - R E Ergun
- Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO, USA
| | - R B Torbert
- Department of Physics, University of New Hampshire, Durham, NH, USA.,Southwest Research Institute, San Antonio, TX, USA
| | - J L Burch
- Southwest Research Institute, San Antonio, TX, USA
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4
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Miyoshi Y, Shinohara I, Ukhorskiy S, Claudepierre SG, Mitani T, Takashima T, Hori T, Santolik O, Kolmasova I, Matsuda S, Kasahara Y, Teramoto M, Katoh Y, Hikishima M, Kojima H, Kurita S, Imajo S, Higashio N, Kasahara S, Yokota S, Asamura K, Kazama Y, Wang SY, Jun CW, Kasaba Y, Kumamoto A, Tsuchiya F, Shoji M, Nakamura S, Kitahara M, Matsuoka A, Shiokawa K, Seki K, Nosé M, Takahashi K, Martinez-Calderon C, Hospodarsky G, Colpitts C, Kletzing C, Wygant J, Spence H, Baker DN, Reeves GD, Blake JB, Lanzerotti L. Collaborative Research Activities of the Arase and Van Allen Probes. Space Sci Rev 2022; 218:38. [PMID: 35757012 PMCID: PMC9213325 DOI: 10.1007/s11214-022-00885-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 03/23/2022] [Indexed: 06/15/2023]
Abstract
This paper presents the highlights of joint observations of the inner magnetosphere by the Arase spacecraft, the Van Allen Probes spacecraft, and ground-based experiments integrated into spacecraft programs. The concurrent operation of the two missions in 2017-2019 facilitated the separation of the spatial and temporal structures of dynamic phenomena occurring in the inner magnetosphere. Because the orbital inclination angle of Arase is larger than that of Van Allen Probes, Arase collected observations at higher L -shells up to L ∼ 10 . After March 2017, similar variations in plasma and waves were detected by Van Allen Probes and Arase. We describe plasma wave observations at longitudinally separated locations in space and geomagnetically-conjugate locations in space and on the ground. The results of instrument intercalibrations between the two missions are also presented. Arase continued its normal operation after the scientific operation of Van Allen Probes completed in October 2019. The combined Van Allen Probes (2012-2019) and Arase (2017-present) observations will cover a full solar cycle. This will be the first comprehensive long-term observation of the inner magnetosphere and radiation belts.
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Affiliation(s)
- Y. Miyoshi
- Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, 464-8601 Japan
| | - I. Shinohara
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, 252-5210 Japan
| | - S. Ukhorskiy
- Applied Physics Laboratory, The Johns Hopkins University, 11101 Johns Hopkins Rd, Laurel, MD 20723 USA
| | - S. G. Claudepierre
- Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, 7115 Math Sciences Bldg., Los Angeles, CA 90095 USA
| | - T. Mitani
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, 252-5210 Japan
| | - T. Takashima
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, 252-5210 Japan
| | - T. Hori
- Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, 464-8601 Japan
| | - O. Santolik
- Faculty of Mathematics an Physics, Charles University, V Holesovickach 2, 18000 Prague, Czechia
- Dept. of Space Physics, Institute of Atmospheric Physics, Czech Academy of Sciences, Bocni II 1401, 14100 Prague, Czechia
| | - I. Kolmasova
- Faculty of Mathematics an Physics, Charles University, V Holesovickach 2, 18000 Prague, Czechia
- Dept. of Space Physics, Institute of Atmospheric Physics, Czech Academy of Sciences, Bocni II 1401, 14100 Prague, Czechia
| | - S. Matsuda
- Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, 920-1192 Japan
| | - Y. Kasahara
- Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, 920-1192 Japan
| | - M. Teramoto
- Graduate School of Engineering, Kyushu Institute of Technology, Kitakyusyu, 804-8550 Japan
| | - Y. Katoh
- Graduate School of Science, Tohoku University, Sendai, 980-8578 Japan
| | - M. Hikishima
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, 252-5210 Japan
| | - H. Kojima
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, 611-0011 Japan
| | - S. Kurita
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, 611-0011 Japan
| | - S. Imajo
- Graduate School of Science, Kyoto University, Kyoto, 606-8502 Japan
| | - N. Higashio
- Strategic Planning and Management Department, Japan Aerospace Exploration Agency, Tokyo, 101-8008 Japan
| | - S. Kasahara
- Graduate School of Science, University of Tokyo, Tokyo, 113-0033 Japan
| | - S. Yokota
- Graduate School of Science, Osaka University, Toyonaka, 560-0043 Japan
| | - K. Asamura
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, 252-5210 Japan
| | - Y. Kazama
- Institute of Astronomy and Astrophysics, Academia Sinica, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617 Taiwan
| | - S.-Y. Wang
- Institute of Astronomy and Astrophysics, Academia Sinica, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617 Taiwan
| | - C.-W. Jun
- Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, 464-8601 Japan
| | - Y. Kasaba
- Graduate School of Science, Tohoku University, Sendai, 980-8578 Japan
| | - A. Kumamoto
- Graduate School of Science, Tohoku University, Sendai, 980-8578 Japan
| | - F. Tsuchiya
- Graduate School of Science, Tohoku University, Sendai, 980-8578 Japan
| | - M. Shoji
- Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, 464-8601 Japan
| | - S. Nakamura
- Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, 464-8601 Japan
- Institute for Advanced Research, Nagoya University, Nagoya, 464-8601 Japan
| | - M. Kitahara
- Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, 464-8601 Japan
- Graduate School of Science, Tohoku University, Sendai, 980-8578 Japan
| | - A. Matsuoka
- Graduate School of Science, Kyoto University, Kyoto, 606-8502 Japan
| | - K. Shiokawa
- Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, 464-8601 Japan
| | - K. Seki
- Graduate School of Science, University of Tokyo, Tokyo, 113-0033 Japan
| | - M. Nosé
- Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, 464-8601 Japan
| | - K. Takahashi
- Applied Physics Laboratory, The Johns Hopkins University, 11101 Johns Hopkins Rd, Laurel, MD 20723 USA
| | - C. Martinez-Calderon
- Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, 464-8601 Japan
| | - G. Hospodarsky
- Department of Physics and Astronomy, University of Iowa, Van Allen Hall (VAN), Iowa City, IA 52242 USA
| | - C. Colpitts
- School of Physics and Astronomy, University of Minnesota, 116 Church St. SE, Minneapolis, MN 55455 USA
| | - Craig Kletzing
- Department of Physics and Astronomy, University of Iowa, Van Allen Hall (VAN), Iowa City, IA 52242 USA
| | - J. Wygant
- School of Physics and Astronomy, University of Minnesota, 116 Church St. SE, Minneapolis, MN 55455 USA
| | - H. Spence
- Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, 8 College Road, Durham, NH 03824 USA
| | - D. N. Baker
- Laboratory for Atmospheric and Space Physics, University of Colorado, 3665 Discovery Drive, 600 UCB, Boulder, CO 80303 USA
| | - G. D. Reeves
- Inteligence & Space Reserarch Division, Los Alamos National Laboratory, PO Box 1663, Los Alamos, NM USA
| | - J. B. Blake
- The Aerospace Corporation, P.O. Box 92957, Los Angeles, CA 90009-2957 USA
| | - L. Lanzerotti
- Department of Physics, New Jersey Institute of Technology, Newark, NJ 07102 USA
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Kessel CE, Andruczyk D, Blanchard JP, Bohm T, Davis A, Hollis K, Humrickhouse PW, Hvasta M, Jaworski M, Jun J, Katoh Y, Khodak A, Klein J, Kolemen E, Larsen G, Majeski R, Merrill BJ, Morley NB, Neilson GH, Pint B, Rensink ME, Rognlien TD, Rowcliffe AF, Smolentsev S, Tillack MS, Waganer LM, Wallace GM, Wilson P, Yoon SJ. Critical Exploration of Liquid Metal Plasma-Facing Components in a Fusion Nuclear Science Facility. Fusion Science and Technology 2019. [DOI: 10.1080/15361055.2019.1610685] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- C. E. Kessel
- Princeton Plasma Physics Laboratory, Princeton, New Jersey
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
| | - D. Andruczyk
- University of Illinois, Campaign-Urbana, Illinois
| | | | - T. Bohm
- University of Wisconsin, Madison, Wisconsin
| | - A. Davis
- University of Wisconsin, Madison, Wisconsin
| | - K. Hollis
- Los Alamos National Laboratory, Los Alamos, New Mexico
| | | | - M. Hvasta
- Princeton Plasma Physics Laboratory, Princeton, New Jersey
| | - M. Jaworski
- Princeton Plasma Physics Laboratory, Princeton, New Jersey
| | - J. Jun
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
| | - Y. Katoh
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
| | - A. Khodak
- Princeton Plasma Physics Laboratory, Princeton, New Jersey
| | - J. Klein
- Savannah River National Laboratory, Jackson, South Carolina
| | - E. Kolemen
- Princeton Plasma Physics Laboratory, Princeton, New Jersey
| | - G. Larsen
- Savannah River National Laboratory, Jackson, South Carolina
| | - R. Majeski
- Princeton Plasma Physics Laboratory, Princeton, New Jersey
| | | | - N. B. Morley
- University of California, Los Angeles, Los Angeles, California
| | - G. H. Neilson
- Princeton Plasma Physics Laboratory, Princeton, New Jersey
| | - B. Pint
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
| | - M. E. Rensink
- Lawrence Livermore National Laboratory, Livermore, California
| | - T. D. Rognlien
- Lawrence Livermore National Laboratory, Livermore, California
| | | | - S. Smolentsev
- University of California, Los Angeles, Los Angeles, California
| | - M. S. Tillack
- University of California, San Diego, San Diego, California
| | | | - G. M. Wallace
- Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - P. Wilson
- University of Wisconsin, Madison, Wisconsin
| | - S.-J. Yoon
- Idaho National Laboratory, Idaho Falls, Idaho
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6
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Rowcliffe A, Garrison L, Yamamoto Y, Tan L, Katoh Y. Materials challenges for the fusion nuclear science facility. Fusion Engineering and Design 2018. [DOI: 10.1016/j.fusengdes.2017.07.012] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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7
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Kessel C, Blanchard J, Davis A, El-Guebaly L, Garrison L, Ghoniem N, Humrickhouse P, Huang Y, Katoh Y, Khodak A, Marriott E, Malang S, Morley N, Neilson G, Rapp J, Rensink M, Rognlien T, Rowcliffe A, Smolentsev S, Snead L, Tillack M, Titus P, Waganer L, Wallace G, Wukitch S, Ying A, Young K, Zhai Y. Overview of the fusion nuclear science facility, a credible break-in step on the path to fusion energy. Fusion Engineering and Design 2018. [DOI: 10.1016/j.fusengdes.2017.05.081] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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8
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Kitamura N, Kitahara M, Shoji M, Miyoshi Y, Hasegawa H, Nakamura S, Katoh Y, Saito Y, Yokota S, Gershman DJ, Vinas AF, Giles BL, Moore TE, Paterson WR, Pollock CJ, Russell CT, Strangeway RJ, Fuselier SA, Burch JL. Direct measurements of two-way wave-particle energy transfer in a collisionless space plasma. Science 2018; 361:1000-1003. [PMID: 30190400 DOI: 10.1126/science.aap8730] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 07/04/2018] [Indexed: 11/02/2022]
Abstract
Particle acceleration by plasma waves and spontaneous wave generation are fundamental energy and momentum exchange processes in collisionless plasmas. Such wave-particle interactions occur ubiquitously in space. We present ultrafast measurements in Earth's magnetosphere by the Magnetospheric Multiscale spacecraft that enabled quantitative evaluation of energy transfer in interactions associated with electromagnetic ion cyclotron waves. The observed ion distributions are not symmetric around the magnetic field direction but are in phase with the plasma wave fields. The wave-ion phase relations demonstrate that a cyclotron resonance transferred energy from hot protons to waves, which in turn nonresonantly accelerated cold He+ to energies up to ~2 kilo-electron volts. These observations provide direct quantitative evidence for collisionless energy transfer in plasmas between distinct particle populations via wave-particle interactions.
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Affiliation(s)
- N Kitamura
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan. .,Department of Earth and Planetary Science, Graduate School of Science, the University of Tokyo, Tokyo, Japan
| | - M Kitahara
- Department of Geophysics, Graduate School of Science, Tohoku University, Sendai, Japan
| | - M Shoji
- Institute for Space-Earth Environmental Research (ISEE), Nagoya University, Nagoya, Japan
| | - Y Miyoshi
- Institute for Space-Earth Environmental Research (ISEE), Nagoya University, Nagoya, Japan
| | - H Hasegawa
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
| | - S Nakamura
- Research Institute for Sustainable Humanosphere (RISH), Kyoto University, Uji, Japan
| | - Y Katoh
- Department of Geophysics, Graduate School of Science, Tohoku University, Sendai, Japan
| | - Y Saito
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
| | - S Yokota
- Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Japan
| | - D J Gershman
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - A F Vinas
- NASA Goddard Space Flight Center, Greenbelt, MD, USA.,Department of Physics, American University, Washington, DC, USA
| | - B L Giles
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - T E Moore
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - W R Paterson
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | | | - C T Russell
- Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA, USA
| | - R J Strangeway
- Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA, USA
| | - S A Fuselier
- Southwest Research Institute, San Antonio, TX, USA.,University of Texas at San Antonio, San Antonio, TX, USA
| | - J L Burch
- Southwest Research Institute, San Antonio, TX, USA
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9
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Ando M, Tanigawa H, Kurotaki H, Katoh Y. Mechanical properties of neutron irradiated F82H using micro-tensile testing. Nuclear Materials and Energy 2018. [DOI: 10.1016/j.nme.2018.07.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Ibano K, Sabau A, Tokunaga K, Akiyoshi M, Kiggans J, Schaich C, Katoh Y, Ueda Y. Surface morphology of Tungsten-F82H after high-heat flux testing using plasma-arc lamps. Nuclear Materials and Energy 2018. [DOI: 10.1016/j.nme.2018.06.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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11
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Sakasegawa H, Kohyama A, Katoh Y, Tamura M, Khono Y, Kimura A. Improvement of High Temperature Mechanical Property by Precipitation Hardening of Reduced Activation Ferritic/Martensitic Steels. Fusion Science and Technology 2017. [DOI: 10.13182/fst03-a333] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- H. Sakasegawa
- : Graduate school of Energy Science, Kyoto University, Gokasho, Uji, Kyoto 611-0011 Japan
| | - A. Kohyama
- : Institute of Advanced Energy, Kyoto University,, Gokasho, Uji, Kyoto 611-0011 Japan
| | - Y. Katoh
- : Institute of Advanced Energy, Kyoto University,, Gokasho, Uji, Kyoto 611-0011 Japan
| | - M. Tamura
- : National Defense Academy, Hashirimizu,, Yokosuka, Kanagawa 239-8686 Japan
| | - Y. Khono
- : Muroran Institute of Technology, Mizumoto, Muroran, Hokkaido 050-8585 Japan
| | - A. Kimura
- : Institute of Advanced Energy, Kyoto University,, Gokasho, Uji, Kyoto 611-0011 Japan
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12
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Katsui H, Hasegawa A, Katoh Y, Hatano Y, Tanaka T, Nogami S, Hinoki T, Shikama T. Study on Compatibility Between Silicon Carbide and Solid Breeding Materials Under Neutron Irradiation. Fusion Science and Technology 2017. [DOI: 10.13182/fst11-a12367] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- H. Katsui
- Institute for Materials Research, Tohoku University, Sendai, Japan
| | - A. Hasegawa
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, Japan
| | - Y. Katoh
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN
| | - Y. Hatano
- Hydrogen Isotope Research Center, University of Toyama, Toyama, Japan
| | - T. Tanaka
- Department of Helical Plasma Research, National Institute for Fusion Science, Toki, Japan
| | - S. Nogami
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, Japan
| | - T. Hinoki
- Institute of Advanced Energy, Kyoto University, Kyoto, Japan
| | - T. Shikama
- Institute for Materials Research, Tohoku University, Sendai, Japan
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13
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Peng Y, Burgess T, Carroll A, Neumeyer C, Canik J, Cole M, Dorland W, Fogarty P, Grisham L, Hillis D, Katoh Y, Korsah K, Kotschenreuther M, LaHaye R, Mahajan S, Majeski R, Nelson B, Patton B, Rasmussen D, Sabbagh S, Sontag A, Stoller R, Tsai CC, Valanju P, Wagner J, Yoder G. Remote Handling and Plasma Conditions to Enable Fusion Nuclear Science R&D Using a Component Testing Facility. Fusion Science and Technology 2017. [DOI: 10.13182/fst09-a9034] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Y.K.M. Peng
- Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - T.W. Burgess
- Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - A.J. Carroll
- Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - C.L. Neumeyer
- Princeton Plasma Physics Laboratory, Princeton, NJ, USA
| | - J.M. Canik
- Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - M.J. Cole
- Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | | | - P.J. Fogarty
- Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - L. Grisham
- Princeton Plasma Physics Laboratory, Princeton, NJ, USA
| | - D.L. Hillis
- Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Y. Katoh
- Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - K. Korsah
- Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | | | | | | | - R. Majeski
- Princeton Plasma Physics Laboratory, Princeton, NJ, USA
| | - B.E. Nelson
- Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - B.D. Patton
- Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - D.A. Rasmussen
- Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | | | | | - R.E. Stoller
- Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - C.-C. Tsai
- Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | | | - J.C. Wagner
- Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - G.L. Yoder
- Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
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14
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Sharafat S, Aoyama A, Morley N, Smolentsev S, Katoh Y, Williams B, Ghoniem N. Development Status of a SiC-Foam Based Flow Channel Insert for a U.S.-ITER DCLL TBM. Fusion Science and Technology 2017. [DOI: 10.13182/fst09-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shahram Sharafat
- University of California Los Angeles, 420 Westwood Plaza, Los Angeles, CA, 90095, U.S.A
| | - Aaron Aoyama
- University of California Los Angeles, 420 Westwood Plaza, Los Angeles, CA, 90095, U.S.A
| | - Neil Morley
- University of California Los Angeles, 420 Westwood Plaza, Los Angeles, CA, 90095, U.S.A
| | - Sergey Smolentsev
- University of California Los Angeles, 420 Westwood Plaza, Los Angeles, CA, 90095, U.S.A
| | - Y. Katoh
- Oak Ridge National Laboratory, Oak Ridge, TN, 37831, U.S.A.; Ultramet Inc., Pacoima, CA, 91331, U.S.A
| | - Brian Williams
- University of California Los Angeles, 420 Westwood Plaza, Los Angeles, CA, 90095, U.S.A
| | - Nasr Ghoniem
- University of California Los Angeles, 420 Westwood Plaza, Los Angeles, CA, 90095, U.S.A
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15
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Peng Y, Canik J, Diem S, Milora S, Park J, Sontag A, Fogarty P, Lumsdaine A, Murakami M, Burgess T, Cole M, Katoh Y, Korsah K, Patton B, Wagner J, Yoder G, Stambaugh R, Staebler G, Kotschenreuther M, Valanju P, Mahajan S, Sawan M. Fusion Nuclear Science Facility (FNSF) before Upgrade to Component Test Facility (CTF). Fusion Science and Technology 2017. [DOI: 10.13182/fst60-441] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Y.K.M. Peng
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - J.M. Canik
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - S.J. Diem
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - S.L. Milora
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - J.M. Park
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - A.C. Sontag
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | | | - A. Lumsdaine
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - M. Murakami
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - T.W. Burgess
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - M.J. Cole
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Y. Katoh
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - K. Korsah
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - B.D. Patton
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - J.C. Wagner
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - G.L. Yoder
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | | | | | | | | | | | - M. Sawan
- University of Wisconsin, Madison, WI, USA
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16
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Muroga T, Sze DK, Okuno K, Terai T, Kimura A, Kurtz RJ, Sagara A, Nygren R, Ueda Y, Doerner RP, Sharpe JP, Kunugi T, Morley NB, Hatano Y, Sokolov MA, Yamamoto T, Hasegawa A, Katoh Y, Ohno N, Tokunaga K, Konishi S, Fukada S, Calderoni P, Yokomine T, Messadek K, Oya Y, Hashimoto N, Hinoki T, Hashizume H, Norimatsu T, Shikama T, Stoller RE, Tanaka KA, Tillack MS. Midterm Summary of Japan-US Fusion Cooperation Program TITAN. Fusion Science and Technology 2017. [DOI: 10.13182/fst11-a12373] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | | | - K. Okuno
- Shizuoka University, Shizuoka, Japan
| | - T. Terai
- University of Tokyo, Tokyo, Japan
| | | | | | | | | | - Y. Ueda
- Osaka University, Suita, Japan
| | | | | | | | | | | | | | | | | | | | - N. Ohno
- Nagoya University, Nagoya, Japan
| | | | | | | | | | | | | | - Y. Oya
- Shizuoka University, Shizuoka, Japan
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17
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Tanabe S, Ii T, Koyama S, Saitoh E, Itoh N, Ohtsuka K, Katoh Y, Shimizu A, Tomita Y. Spatiotemporal treadmill gait measurements using a laser range scanner: feasibility study of the healthy young adults. Physiol Meas 2017; 38:N81-N92. [PMID: 28327472 DOI: 10.1088/1361-6579/aa63d1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Spatio-temporal parameters are typically used for gait analysis. Although these parameters are measured by sophisticated systems such as 3D motion capture system or optoelectronic bars, these systems cannot be deployed easily because of their high costs, large space requirements and elaborate set-up. The purpose of this study is to develope a system for measuring spatiotemporal gait parameters using a laser range scanner during treadmill gait. APPROACH To calculate accurate spatiotemporal parameters, the differences between the laser range scanner measured values and the reference values obtained from a 3D motion capture system were investigated in thirty subjects. From measurements in time and position at foot contact/off, adjustments to compensate for the differences in time and position were derived. Then, to determine the validity of the proposed system, values from the proposed system and the reference system were compared in four additional subjects. MAIN RESULTS The results indicate that the data from the laser range scanner demonstrate certain differences in time and position compared with reference values. However, when compensation values were introduced, each spatiotemporal parameter correlated well with the reference values. SIGNIFICANCE This newer system is smaller, is easier to deploy and requires less training than the 3D motion capture system.
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Affiliation(s)
- S Tanabe
- Faculty of Rehabilitation, School of Health Sciences, Fujita Health University, Toyoake, Japan
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18
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Wong C, Abdou M, Katoh Y, Kurtz RJ, Lumsdaine A, Marriott E, Merrill B, Morley N, Pint BA, Sawan ME, Smolentsev S, Williams B, Willms RS, Youssef M. Progress on DCLL Blanket Concept. Fusion Science and Technology 2017. [DOI: 10.13182/fst13-a19161] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- C.P.C. Wong
- General Atomics, PO Box 85608, San Diego, California 92186-5608
| | - M. Abdou
- University of California Los Angeles, Los Angeles, California 90095-1597
| | - Y. Katoh
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - R. J. Kurtz
- Pacific Northwest National Laboratory, Richland, Washington 99352
| | - A. Lumsdaine
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - E. Marriott
- University of Wisconsin Madison, Wisconsin 53706
| | - B. Merrill
- Idaho National Laboratory, Idaho Falls, Idaho 83515
| | - N. Morley
- University of California Los Angeles, Los Angeles, California 90095-1597
| | - B. A. Pint
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - M. E. Sawan
- University of Wisconsin Madison, Wisconsin 53706
| | - S. Smolentsev
- University of California Los Angeles, Los Angeles, California 90095-1597
| | | | | | - M. Youssef
- University of California Los Angeles, Los Angeles, California 90095-1597
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19
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Takahashi H, Agari K, Aoki K, Hagiwara M, Hirose E, Ieiri M, Iwasaki R, Katoh Y, Minakawa M, Muto R, Naruki M, Noumi H, Sato Y, Sawada S, Shirakabe Y, Suzuki Y, Tanaka KH, Toyoda A, Watanabe H, Yamanoi Y. Indirectly water-cooled production target at J-PARC hadron facility. J Radioanal Nucl Chem 2015. [DOI: 10.1007/s10967-015-3940-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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20
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Hirata A, Hashimoto K, Katoh Y, Sakai H, Bruce AG, Rose TM, Kaneko A, Suzuki J, Nikami H, Yanai T. Characterization of spontaneous malignant lymphomas in Japanese macaques (Macaca fuscata). Vet Pathol 2014; 52:566-72. [PMID: 25248517 DOI: 10.1177/0300985814547389] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Lymphomas are common spontaneous tumors in nonhuman primates but remain poorly characterized in Japanese macaques (Macaca fuscata). This study examined 5 cases of spontaneous malignant lymphoma in Japanese macaques, focusing on the immunophenotypes and presence of simian lymphocryptoviruses, which are Epstein-Barr virus-related herpesviruses in nonhuman primates. The macaques with lymphoma were 5 to 28 years old, indicating that lymphomas develop over a wide age range. The common macroscopic findings were splenomegaly and enlargement of lymph nodes. Histologic and immunohistochemical analyses revealed that all cases were non-Hodgkin type and exhibited a T-cell phenotype, positive for CD3 but negative for CD20 and CD79α. The lymphomas exhibited diverse cellular morphologies and were subdivided into 3 types according to the World Health Organization classification. These included 3 cases of peripheral T-cell lymphoma, not otherwise specified; 1 case of T-cell prolymphocytic leukemia; and 1 case of an unclassifiable T-cell lymphoma. Positive signals were detected by in situ hybridization in 2 of the 4 examined cases using probes for the Epstein-Barr virus-encoded small RNA (EBER). Furthermore, the presence of M. fuscata lymphocryptovirus 2, a macaque homolog of Epstein-Barr virus, was demonstrated in EBER-positive cases by polymerase chain reaction amplification followed by direct sequencing. Immunohistochemistry using antibody to the Epstein-Barr virus-encoded nuclear antigen 2 was negative, even in the EBER-positive cases. The present study suggests that T-cell lymphoma is more common than B-cell lymphoma in Japanese macaques and that M. fuscata lymphocryptovirus 2 is present in some cases.
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Affiliation(s)
- A Hirata
- Division of Animal Experiment, Life Science Research Center, Gifu University, Gifu City, Gifu, Japan
| | - K Hashimoto
- Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu City, Gifu, Japan
| | - Y Katoh
- Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu City, Gifu, Japan
| | - H Sakai
- Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu City, Gifu, Japan
| | - A G Bruce
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA, USA
| | - T M Rose
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA, USA
| | - A Kaneko
- Center for Human Evolution Modeling Research, Primate Research Institute, Kyoto University, Inuyama City, Aichi, Japan
| | - J Suzuki
- Center for Human Evolution Modeling Research, Primate Research Institute, Kyoto University, Inuyama City, Aichi, Japan
| | - H Nikami
- Division of Animal Experiment, Life Science Research Center, Gifu University, Gifu City, Gifu, Japan
| | - T Yanai
- Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu City, Gifu, Japan
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21
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Katoh Y. Long term mortality of Takotsubo cardiomyopathy. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p1502] [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: 11/15/2022] Open
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22
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Mitamura T, Watari H, Wang L, Kanno H, Hassan MK, Miyazaki M, Katoh Y, Kimura T, Tanino M, Nishihara H, Tanaka S, Sakuragi N. Downregulation of miRNA-31 induces taxane resistance in ovarian cancer cells through increase of receptor tyrosine kinase MET. Oncogenesis 2013; 2:e40. [PMID: 23552883 PMCID: PMC3641356 DOI: 10.1038/oncsis.2013.3] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [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] [Indexed: 12/25/2022] Open
Abstract
Ovarian cancer is one of the most aggressive female reproductive tract tumors. Paclitaxel (PTX) is widely used for the treatment of ovarian cancer. However, ovarian cancers often acquire chemotherapeutic resistance to this agent. We investigated the mechanism of chemoresistance by analysis of microRNAs using the ovarian cancer cell line KFr13 and its PTX-resistant derivative (KFr13Tx). We found that miR-31 was downregulated in KFr13Tx cells, and that re-introduction of miR31 re-sensitized them to PTX both in vitro and in vivo. miR-31 was found to bind to the 3′-UTR of mRNA of MET, and the decrease in MET correlated to higher sensitivity to PTX. Furthermore, co-treatment of KFr13Tx cells with MET inhibitors sensitized the tumor cells to PTX both in vitro and in vivo. In addition, lower levels of miR31 and higher expression of MET in human ovarian cancer specimens were significantly correlated with PTX chemoresistance and poor prognosis. This study demonstrated miR31-dependent regulation of MET for chemoresistance of ovarian cancer, raising the possibility that combination therapy with a MET inhibitor and PTX will increase PTX efficacy.
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Affiliation(s)
- T Mitamura
- 1] Department of Obstetrics and Gynecology, Hokkaido University Graduate School of Medicine, Sapporo, Japan [2] Department of Cancer Pathology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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23
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Wong C, Abdou M, Dagher M, Katoh Y, Kurtz R, Malang S, Marriott E, Merrill B, Messadek K, Morley N, Sawan M, Sharafat S, Smolentsev S, Sze D, Willms S, Ying A, Youssef M. An overview of the US DCLL ITER-TBM program. Fusion Engineering and Design 2010. [DOI: 10.1016/j.fusengdes.2010.02.021] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Abstract
Hedgehog signaling is aberrantly activated in glioma, medulloblastoma, basal cell carcinoma, lung cancer, esophageal cancer, gastric cancer, pancreatic cancer, breast cancer, and other tumors. Hedgehog signals activate GLI family members via Smoothened. RTK signaling potentiates GLI activity through PI3K-AKT-mediated GSK3 inactivation or RAS-STIL1-mediated SUFU inactivation, while GPCR signaling to Gs represses GLI activity through adenylate cyclase-mediated PKA activation. GLI activators bind to GACCACCCA motif to regulate transcription of GLI1, PTCH1, PTCH2, HHIP1, MYCN, CCND1, CCND2, BCL2, CFLAR, FOXF1, FOXL1, PRDM1 (BLIMP1), JAG2, GREM1, and Follistatin. Hedgehog signals are fine-tuned based on positive feedback loop via GLI1 and negative feedback loop via PTCH1, PTCH2, and HHIP1. Excessive positive feedback or collapsed negative feedback of Hedgehog signaling due to epigenetic or genetic alterations leads to carcinogenesis. Hedgehog signals induce cellular proliferation through upregulation of N-Myc, Cyclin D/E, and FOXM1. Hedgehog signals directly upregulate JAG2, indirectly upregulate mesenchymal BMP4 via FOXF1 or FOXL1, and also upregulate WNT2B and WNT5A. Hedgehog signals induce stem cell markers BMI1, LGR5, CD44 and CD133 based on cross-talk with WNT and/or other signals. Hedgehog signals upregulate BCL2 and CFLAR to promote cellular survival, SNAI1 (Snail), SNAI2 (Slug), ZEB1, ZEB2 (SIP1), TWIST2, and FOXC2 to promote epithelial-to-mesenchymal transition, and PTHLH (PTHrP) to promote osteolytic bone metastasis. KAAD-cyclopamine, Mu-SSKYQ-cyclopamine, IPI-269609, SANT1, SANT2, CUR61414 and HhAntag are small-molecule inhibitors targeted to Smoothened, GANT58, GANT61 to GLI1 and GLI2, and Robot-nikinin to SHH. Hedgehog signaling inhibitors should be used in combination with RTK inhibitors, GPCR modulators, and/or irradiation for cancer therapy.
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Affiliation(s)
- Y Katoh
- M & M Medical Bioinformatics, Hongo 113-0033, Japan
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25
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Hiramatsu A, Miwa H, Shikami M, Ikai T, Tajima E, Yamamoto H, Imai N, Hattori A, Kyo T, Watarai M, Miura K, Satoh A, Itoh M, Imamura A, Mihara H, Katoh Y, Nitta M. Disease-specific expression of VEGF and its receptors in AML cells: possible autocrine pathway of VEGF/type1 receptor of VEGF in t(15;17) AML and VEGF/type2 receptor of VEGF in t(8;21) AML. Leuk Lymphoma 2009; 47:89-95. [PMID: 16465716 DOI: 10.1080/10428190500270386] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Various angiogenic factors, such as vascular endothelial growth factor (VEGF) and an associated molecule, placenta growth factor (PlGF), are thought to be important for normal and malignant hematopoiesis. This study examined mRNA expression of VEGF, PlGF and receptors for these molecules in AML cells and identified the disease-specific patterns of expression. AML M3 having t(15;17) abnormality showed highest expression of VEGF and VEGF receptor type 1 (VEGFR1), suggesting the autocrine pathway of VEGF-VEGFR1. Then, t(8;21) AML demonstrated augmented expression of VEGF and VEGF receptor type 2 (VEGFR2), suggesting VEGF-VEGFR2 autocrine pathway. Then, addition of VEGFR2 kinase inhibitor in Kasumi-1, a t(8;21) AML cell line, resulted in marked inhibition of cell growth, although growth inhibitory effect of R2 kinase inhibitor to HL-60 was marginal. In addition, cell cycle analysis study showed S-phase cell population reduction by R2 kinase inhibitor in Kasumi-1, but not in HL-60. This observation is thought to be the rationale for novel molecular target therapy directed to angiogenic molecules.
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MESH Headings
- Adult
- Aged
- Autocrine Communication/genetics
- Cell Cycle/drug effects
- Cell Cycle/physiology
- Cell Line, Tumor
- Cell Proliferation/drug effects
- Chromosome Aberrations
- Chromosomes, Human, Pair 15/genetics
- Chromosomes, Human, Pair 17/genetics
- Chromosomes, Human, Pair 21/genetics
- Chromosomes, Human, Pair 8/genetics
- Disease
- Enzyme Inhibitors/pharmacology
- Gene Expression Regulation, Leukemic/genetics
- HL-60 Cells
- Humans
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/metabolism
- Middle Aged
- Placenta Growth Factor
- Pregnancy Proteins/biosynthesis
- Pregnancy Proteins/genetics
- RNA, Messenger/biosynthesis
- RNA, Messenger/genetics
- Reverse Transcriptase Polymerase Chain Reaction
- Translocation, Genetic/genetics
- Tumor Cells, Cultured
- Vascular Endothelial Growth Factor A/biosynthesis
- Vascular Endothelial Growth Factor A/genetics
- Vascular Endothelial Growth Factor Receptor-1/biosynthesis
- Vascular Endothelial Growth Factor Receptor-1/genetics
- Vascular Endothelial Growth Factor Receptor-2/antagonists & inhibitors
- Vascular Endothelial Growth Factor Receptor-2/biosynthesis
- Vascular Endothelial Growth Factor Receptor-2/genetics
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Affiliation(s)
- A Hiramatsu
- Department of Internal Medicine, Aichi Medical University School of Medicine, Nagakute, Japan
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26
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Katoh Y, Nozawa T, Snead L, Hinoki T, Kohyama A. Property tailorability for advanced CVI silicon carbide composites for fusion. Fusion Engineering and Design 2006. [DOI: 10.1016/j.fusengdes.2005.08.045] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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27
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Katoh Y. Progress in SiC-Based Ceramic Composites for Fusion Applications. Fusion Sci Technol 2003. [DOI: 10.13182/fst03-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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28
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Sakasegawa H, Hirose T, Kohyama A, Katoh Y, Harada T, Asakura K. Microstructural stability of reduced activation ferritic/martensitic steels under high temperature and stress cycling. Fusion Engineering and Design 2002. [DOI: 10.1016/s0920-3796(02)00290-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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29
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Park J, Katoh Y, Kohyama A, Lee S, Yoon H. Evaluation of fracture toughness of ceramic matrix composites using small specimens. Fusion Engineering and Design 2002. [DOI: 10.1016/s0920-3796(02)00150-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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30
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Katoh Y, Dong S, Kohyama A. Thermo-mechanical properties and microstructure of silicon carbide composites fabricated by nano-infiltrated transient eutectoid process. Fusion Engineering and Design 2002. [DOI: 10.1016/s0920-3796(02)00180-1] [Citation(s) in RCA: 112] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Saito T, Miyazaki H, Bahar A, Rahardjo A, Djoharnas H, Katoh Y, Kusukawa Y, Takehara T, Koga T. Oral health condition and endemic goitre, in an iodine-deficient area in Bali, Indonesia. Asia Pac J Public Health 2002; 13:45-8. [PMID: 12109261 DOI: 10.1177/101053950101300110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Iodine deficiency is a major determinant of endemic goiter which affects bone growth. The purpose of this study was to clarify the relationship between iodine deficiency and oral health. A cross-sectional survey was carried out on 181 inhabitants aged 17 to 40 years in two villages in an iodine-deficient area in Bali, Indonesia. Thyroid swelling, serum level of thyroid-stimulating hormone, DMFT index, plaque index, gingival index, dietary habits and socioeconomic status were examined. Thirty two subjects (21%) had thyroid swelling considered to be endemic goiter, with the highest prevalence in females aged 21 to 30 years (40-41%). The DMFT, food habits, and socioeconomic status were different between both villages. Multiple regression analysis adjusted for age, sex, and location (village) did not detect any association between DMFT and serum thyroid-stimulating hormone level or thyroid swelling. Further studies will be required to confirm these findings.
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Affiliation(s)
- T Saito
- Department of Preventive Dentistry, Kyushu University Faculty of Dental Science, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
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32
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Hino K, Korenaga M, Orito E, Katoh Y, Yamaguchi Y, Ren F, Kitase A, Satoh Y, Fujiwara D, Okita K. Constrained genomic and conformational variability of the hypervariable region 1 of hepatitis C virus in chronically infected patients. J Viral Hepat 2002; 9:194-201. [PMID: 12010507 DOI: 10.1046/j.1365-2893.2002.00349.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
We analysed the genomic and conformational variability of the hypervariable region 1 (HVR1) of the hepatitis C virus (HCV) to evaluate the importance of its biological role. A total of 865 genotype 1b HVR1 subclones were collected from serially sampled sera in 11 patients with chronic hepatitis C, four of whom received interferon therapy. Consequently, 169 distinct sequences were examined for amino acid substitutions as well as hydrophilic or hydrophobic profile at each amino acid position within HVR1. Secondary structure of HVR1 was also predicted by the method of Robson in 90 distinct sequences from eight patients, including three interferon-treated patients. Some positions within the HVR1 were invariable or nearly so as to amino acid substitution. Hydrophilic or hydrophobic residues exclusively predominated at several positions. These constrained amino acid replacement and hydrophilic or hydrophobic profiles were conserved irrespective of interferon therapy, though the frequency of amino acid replacement was greater at almost all amino acid positions within the HVR1 in interferon-treated patients. The quasispecies of HCV showed various secondary structures of HVR1, but many sequences seemed to have common characteristics. beta sheet conformations around both the N-terminus and position 20 (numbered from the NH2 terminus of E2 envelope glycoprotein), and/or coil structures around the C-terminus of HVR1 could be identified. These results suggest that HVR1 amino acid replacements are strongly constrained by a well-ordered structure, in spite of being tolerant to amino acid substitutions, and imply an important biological role of the HVR1 protein in HCV replication.
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Affiliation(s)
- Keisuke Hino
- Department of Gastroenterology and Hepatology, Yamaguchi University School of Medicine, Yamaguchi, Japan.
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33
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Watarai M, Miwa H, Shikami M, Sugamura K, Wakabayashi M, Satoh A, Tsuboi K, Imamura A, Mihara H, Katoh Y, Kita K, Nitta M. Expression of endothelial cell-associated molecules in AML cells. Leukemia 2002; 16:112-9. [PMID: 11840270 DOI: 10.1038/sj.leu.2402326] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2001] [Accepted: 08/28/2001] [Indexed: 11/08/2022]
Abstract
Recently, it has been clarified that interaction between hematopoietic cells and endothelial cells is important in normal hematopoiesis and leukemogenesis. In this study, we examined the relationship between AML cells and endothelial cells by analyzing the expression profile of angiogenic factors, angiopoietin-1 (Ang-1), Ang-2, Tie-2 (a receptor for angiopoietins) and vascular endothelial growth factor (VEGF). Our results demonstrated that CD7(+)AML expressed Ang-2 mRNA frequently and integrin-family adhesion molecules (CD11c and CD18) intensively, suggesting the close correlation with endothelial cells. On the other hand, in t(8;21) AML cells, expression of Ang-2 was infrequent and expression of integrin-family adhesion molecules (CD11b, CD11c and CD18) was weak, suggesting the sparse association with endothelial cells. As for CD7(+)AML cells, despite the frequent and intense expression of endothelial cell-associated molecules (such as Ang-2, CD11c and CD18), intensity of Tie-2 expression was quite low (P < 0.05). Ang-2 expressed in CD7(+)AML cells is not considered to act in an autocrine fashion, but to work on endothelial cells to "feed" leukemic cells. Although Ang-2 is recognized as a natural antagonist for Tie-2, our data presented here suggested the alternative role of Ang-2 in the relationship between endothelial cells and leukemia cells, at least in a subset of leukemia such as CD7(+)AML. These results were supported by the study using AML cell lines, KG-1 (CD7 negative) and its subline KG-1a (CD7 positive); KG-1 had mRNA expression profile of Ang-1(+)Ang-2(-)Tie-2(+), while KG-1a showed Ang-1(+)Ang-2(+)Tie-2(-). These difference in the expression profile of angiogenic factors between CD7(+)AML and t(8;21)AML may explain the characteristic morphological features of these leukemias (CD7(+)AML as blastic type and t(8;21)AML as differentiative type).
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MESH Headings
- Acute Disease
- Angiopoietin-1
- Angiopoietin-2
- Antigens, CD7/analysis
- Blood Cells/pathology
- Bone Marrow Cells/pathology
- CD18 Antigens/biosynthesis
- CD18 Antigens/genetics
- Cell Cycle
- Cells, Cultured/metabolism
- Endothelial Growth Factors/biosynthesis
- Endothelial Growth Factors/genetics
- Endothelium, Vascular/cytology
- Gene Expression Regulation, Leukemic
- Humans
- Immunophenotyping
- Integrin alphaXbeta2/biosynthesis
- Integrin alphaXbeta2/genetics
- Leukemia, Myeloid/genetics
- Leukemia, Myeloid/metabolism
- Leukemia, Myeloid/pathology
- Lymphokines/biosynthesis
- Lymphokines/genetics
- Macrophage-1 Antigen/biosynthesis
- Macrophage-1 Antigen/genetics
- Membrane Glycoproteins/biosynthesis
- Membrane Glycoproteins/genetics
- Neoplasm Proteins/biosynthesis
- Neoplasm Proteins/genetics
- Neovascularization, Pathologic/genetics
- Protein Biosynthesis
- Proteins/genetics
- Proto-Oncogene Proteins
- Receptor, TIE-2
- Tumor Cells, Cultured/metabolism
- Umbilical Veins/cytology
- Vascular Endothelial Growth Factor A
- Vascular Endothelial Growth Factors
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Affiliation(s)
- M Watarai
- Department of Internal Medicine, Division of Hematology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
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Abstract
The purpose of this study was to evaluate the effect of filler size on the wear of resin cements. Materials tested included four experimental dual-cure resin cements (Kuraray) consisting of different-sized filler particles. A rectangular box cavity was prepared on the flattened occlusal surface of extracted human molars. Ceramic inlays for the cavities were fabricated using the Cerec 2 system. The Cerec inlays were cemented with the respective cements and adhesive systems according to the manufacturer's directions. The restored surface was finished by wet-grinding with an 800-grit silicon carbide paper. Six specimens were prepared for each resin cement. Half of the specimens were subjected to a three-body wear test for 200,000 cycles, and the others were subjected to a toothbrush abrasion test for 30,000 cycles. The worn surface of each restoration was scanned by a profilometer (Surfcom 475 A) at eight different points for each restoration. The wear value was determined by measuring the vertical gap depth on the profilometric tracings. The data were statistically analyzed by one-way analysis of variance (ANOVA) and Scheffe's test. The results showed that, with increase of filler size, the wear value decreased in the toothbrush test and increased in the three-body wear test. The cement with 0.04-microm filler exhibited the lowest wear value among the materials in the three-body wear test, and the same wear value as the cement with 0.97-microm filler in the toothbrush test. Based upon the results of this study, it is concluded that the wear of resin cements was affected by the filler size as well as the mode of wear test.
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Affiliation(s)
- K Shinkai
- Department of Operative Dentistry, The Nippon Dental University School of Dentistry at Niigata, 1-8 Hamaura-cho, Niigata 951-8580, Japan.
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Katoh Y, Itoh K, Yoshida E, Miyagishi M, Fukamizu A, Yamamoto M. Two domains of Nrf2 cooperatively bind CBP, a CREB binding protein, and synergistically activate transcription. Genes Cells 2001; 6:857-68. [PMID: 11683914 DOI: 10.1046/j.1365-2443.2001.00469.x] [Citation(s) in RCA: 378] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND Nrf2 belongs to the Cap-N-Collar (CNC) transcription factor family and is essential for the antioxidant responsive element (ARE)-mediated expression of a group of detoxifying and antioxidant genes. The forced expression of Nrf2 in mammalian cells activates the expression of target genes through the ARE, with Nrf2 showing the highest transactivation activity among the CNC family of transcription factors. To elucidate the molecular mechanisms generating this potent transactivation activity, we examined the functions of the domains within Nrf2. RESULT We found that Nrf2 contains two transcription activation domains, Neh4 and Neh5, which act synergistically to attain maximum a activation of reporter gene expression. Neh4 and Neh5 both individually and cooperatively bind to CBP (CREB (cAMP Responsive Element Binding protein) Binding Protein). In fact, the specific inhibitor of CBP, adenovirus E1A protein, significantly reduced Nrf2 activity. Importantly, the CBP-binding activity of Nrf2 deletion mutants positively correlated with their transactivation activity. Neh5 contains a motif which is commonly conserved among the CNC factors, whereas Neh4 contains the novel CBP-interacting motif recently identified in p53 and E2F. CONCLUSIONS Our results indicate that Nrf2 exploits the cooperative binding of two independent transactivation domains to CBP in the acquisition of a potent transactivation activity.
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Affiliation(s)
- Y Katoh
- Center for Tsukuba Advanced Research Alliance, University of Tsukuba, Japan
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36
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Abstract
Intraosseous ganglia occur most frequently in the long bones of the lower limbs, particularly in the medial malleolus of the tibia. They usually appear as radiographically well circumscribed juxta-articular cystic lesions, containing myxoid fibrous tissue histologically. Intraosseous ganglia in the hand are very rare. Most reported cases have involved the carpal bones, in particular the lunate and scaphoid. To our knowledge, the present case is the third report of an intraosseous ganglion appearing in the first metacarpal bone; it arose in a patient who had been on dialysis for 25 years, mimicking amyloidosis of bone.
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Affiliation(s)
- H Nakano
- Department of Orthopaedic Surgery, Tokyo Women's Medical University, 8-1 Kawadacho, Shinjuku-ku, Tokyo 162-8666, Japan.
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Korenaga M, Hino K, Katoh Y, Yamaguchi Y, Okuda M, Yoshioka K, Okita K. A possible role of hypervariable region 1 quasispecies in escape of hepatitis C virus particles from neutralization. J Viral Hepat 2001; 8:331-40. [PMID: 11555190 DOI: 10.1046/j.1365-2893.2001.00305.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
We examined serial changes in the hypervariable region 1(HVR1) quasispecies both in immune and nonimmune complexed hepatitis C virus (HCV) particles from 12 patients with chronic hepatitis C to elucidate the mechanism by which genetic diversification of HCV during the course of infection allows escape of virus from the humoural immune response. Immune and nonimmune complexes were separated by differential flotation centrifugation and immunoprecipitation, and their HVR1 quasispecies were determined by subcloning and sequencing. The presence of a specific antibody against a specific viral clone in serum was examined in two patients by Western blotting of the corresponding recombinant HVR1 protein. The distribution of HVR1 quasispecies in both immune and nonimmune complexes conspicuously changed over time in most of the patients studied. In seven patients, various HCV clones serially shifted from nonimmune complexes to immune complexes. In four of them, a group of clones with similar HVR1 sequences to each other remained predominant in nonimmune complexes, whereas minor clones with sequences considerably divergent from the predominant clones shifted from nonimmune complexes to immune complexes. These results suggest a mechanism for persistent infection of HCV, in which major HCV clones escape from neutralization by anti-HVR1 antibodies by generating considerably divergent minor 'decoy' clones which may be preferentially neutralized.
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Affiliation(s)
- M Korenaga
- Department of Gastroenterology and Hepatology, Yamaguchi University, School of Medicine, Yamaguchi, Japan
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38
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Shime N, Ashida H, Hiramatsu N, Kageyama K, Katoh Y, Hashimoto S, Tanaka Y. Arterial ketone body ratio for the assessment of the severity of illness in pediatric patients following cardiac surgery. J Crit Care 2001; 16:102-7. [PMID: 11689766 DOI: 10.1053/jcrc.2001.28786] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE The purpose of this study was to assess whether the arterial ketone body ratio (AKBR) can be effectively used to evaluate the severity of illness in children following cardiac surgery. MATERIALS AND METHODS AKBR was measured in 157 consecutive pediatric patients following heart surgery on the odd numbers of postoperative days. The relationship between AKBR and patient outcome was analyzed using the data of 141 patients with cardiopulmonary bypass. RESULTS Initial AKBR was frequently lower than 1.0, and this was associated with the increases in total ketone body counts. Insufficient glucose metabolism appeared to contribute to the low initial AKBR. As a result, the specificity of initial AKBR as a mortality predictor was lower than that of initial blood lactate. In the sequential analysis of AKBR for the 48 patients with PICU stay longer than 5 days, patients showing a sustained lower level <1.0 had significantly higher development of organ dysfunction (liver, heart) and greater mortality (56%). CONCLUSIONS Sustained postoperative decrease in AKBR <1.0 represents lethal outcome. The analysis of AKBR trend in combination with a measurement of blood lactate level in early postoperative period appears to be useful for the assessment of the severity of illness in pediatric patients following heart surgery.
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Affiliation(s)
- N Shime
- Department of Anesthesiology and Intensive Care, Kyoto Prefectural University of Medicine, Kyoto, Japan
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39
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Shiokawa K, Kadota T, Ejiri MK, Otsuka Y, Katoh Y, Satoh M, Ogawa T. Three-channel imaging fabry-perot interferometer for measurement of mid-latitude airglow. Appl Opt 2001; 40:4286-4296. [PMID: 18360466 DOI: 10.1364/ao.40.004286] [Citation(s) in RCA: 2] [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: 05/26/2023]
Abstract
We have developed a three-channel imaging Fabry-Perot interferometer with which to measure atmospheric wind and temperature in the mesosphere and thermosphere through nocturnal airglow emissions. The interferometer measures two-dimensional wind and temperature for wavelengths of 630.0 nm (OI, altitude, 200-300 km), 557.7 nm (OI, 96 km), and 839.9 nm (OH, 86 km) simultaneously with a time resolution of 20 min, using three cooled CCD detectors with liquid-N(2) Dewars. Because we found that the CCD sensor moves as a result of changes in the level of liquid N(2) in the Dewars, the cooling system has been replaced by thermoelectric coolers. The fringe drift that is due to changes in temperature of the etalon is monitored with a frequency-stabilized He-Ne laser. We also describe a data-reduction scheme for calculating wind and temperature from the observed fringes. The system is fully automated and has been in operation since June 1999 at the Shigaraki Observatory (34.8N, 136.1E), Shiga, Japan.
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40
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Lin X, Takemori H, Katoh Y, Doi J, Horike N, Makino A, Nonaka Y, Okamoto M. Salt-inducible kinase is involved in the ACTH/cAMP-dependent protein kinase signaling in Y1 mouse adrenocortical tumor cells. Mol Endocrinol 2001; 15:1264-76. [PMID: 11463852 DOI: 10.1210/mend.15.8.0675] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The involvement of salt-inducible kinase, a recently cloned protein serine/threonine kinase, in adrenal steroidogenesis was investigated. When Y1 mouse adrenocortical tumor cells were stimulated by ACTH, the cellular content of salt-inducible kinase mRNA, protein, and enzyme activity changed rapidly. Its level reached the highest point in 1-2 h and returned to the initial level after 8 h. The mRNA levels of cholesterol side-chain cleavage cytochrome P450 and steroidogenic acute regulatory protein, on the other hand, began to rise after a few hours, reaching the highest levels after 8 h. The salt-inducible kinase mRNA level in ACTH-, forskolin-, or 8-bromo-cAMP-treated Kin-7 cells, mutant Y1 with less cAMP-dependent PKA activity, remained low. However, Kin-7 cells, when transfected with a PKA expression vector, expressed salt-inducible kinase mRNA. Y1 cells that overexpressed salt-inducible kinase were isolated, and the mRNA levels of steroidogenic genes in these cells were compared with those in the parent Y1. The level of cholesterol side-chain cleavage cytochrome P450 mRNA in the salt-inducible kinase-overexpressing cells was markedly low compared with that in the parent, while the levels of Ad4BP/steroidogenic factor-1-, ACTH receptor-, and steroidogenic acute regulatory protein-mRNAs in the former were similar to those in the latter. The ACTH-dependent expression of cholesterol side-chain cleavage cytochrome P450- and steroidogenic acute regulatory protein-mRNAs in the salt-inducible kinase-overexpressing cells was significantly repressed. The promoter activity of the cholesterol side-chain cleavage cytochrome P450 gene was assayed by using Y1 cells transfected with a human cholesterol side-chain cleavage cytochrome P450 promoter-linked reporter gene. Addition of forskolin to the culture medium enhanced the cholesterol side-chain cleavage cytochrome P450 promoter activity, but the forskolin-dependently activated promoter activity was inhibited when the cells were transfected with a salt-inducible kinase expression vector. This inhibition did not occur when the cells were transfected with a salt-inducible kinase (K56M) vector that encoded an inactive kinase. The salt-inducible kinase's inhibitory effect was also observed when nonsteroidogenic, nonAd4BP/steroidogenic factor-1 -expressing, NIH3T3 cells were used for the promoter assays. These results suggested that salt-inducible kinase might play an important role(s) in the cAMP-dependent, but Ad4BP/steroidogenic factor-1-independent, gene expression of cholesterol side-chain cleavage cytochrome P450 in adrenocortical cells.
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Affiliation(s)
- X Lin
- Department of Molecular Physiological Chemistry, Osaka University Medical School H-1, Osaka, 565-0871, Japan
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41
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Takatsu H, Katoh Y, Shiba Y, Nakayama K. Golgi-localizing, gamma-adaptin ear homology domain, ADP-ribosylation factor-binding (GGA) proteins interact with acidic dileucine sequences within the cytoplasmic domains of sorting receptors through their Vps27p/Hrs/STAM (VHS) domains. J Biol Chem 2001; 276:28541-5. [PMID: 11390366 DOI: 10.1074/jbc.c100218200] [Citation(s) in RCA: 158] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
GGA (Golgi-localizing, gamma-adaptin ear homology domain, ARF-binding) proteins are potential effectors of ADP-ribosylation factors, are associated with the trans-Golgi network (TGN), and are involved in protein transport from this compartment. By yeast two-hybrid screening and subsequent two-hybrid and pull-down analyses, we have shown that GGA proteins, through their VHS (Vps27p/Hrs/STAM) domains, interact with acidic dileucine sequences found in the cytoplasmic domains of TGN-localized sorting receptors such as sortilin and mannose 6-phosphate receptor. A mutational analysis has revealed that a leucine pair and a cluster of acidic residues adjacent to the pair are mainly responsible for the interaction. A chimeric receptor with the sortilin cytoplasmic domain localizes to the TGN, whereas the chimeric receptor with a mutation at the leucine pair or the acidic cluster is mislocalized to punctate structures reminiscent of early endosomes. These results indicate that GGA proteins regulate the localization to or exit from the TGN of the sorting receptors.
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Affiliation(s)
- H Takatsu
- Institute of Biological Sciences and Gene Experiment Center, University of Tsukuba, Tsukuba Science City, Ibaraki 305-8572, Japan
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42
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Hino K, Katoh Y, Vardas E, Sim J, Okita K, Carman WF. The effect of introduction of universal childhood hepatitis B immunization in South Africa on the prevalence of serologically negative hepatitis B virus infection and the selection of immune escape variants. Vaccine 2001; 19:3912-8. [PMID: 11427265 DOI: 10.1016/s0264-410x(01)00121-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The effect of universal hepatitis B vaccination on the prevalence of serologically negative hepatitis B virus infection (HBV) and the emergence of HBsAg variants is unknown. We prospectively studied two different cohorts of 12--24 month old children in South Africa. They consisted of the unvaccinated children (n=459) born before the introduction of universal vaccination and the vaccinated children (n=1213) between 1 and 2 years after the introduction of the vaccination program. The frequency of detecting HBV DNA by PCR was reduced from 6.5% in unvaccinated children to 0.3% in vaccinated children (P<0.00001). There were no unique amino acid substitutions within the major hydrophilic region of the S sequence in both pre- and post-vaccination samples. Universal childhood vaccination reduced the frequency of serologically negative HBV infection and did not necessarily lead to selection of escape variants.
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Affiliation(s)
- K Hino
- First Department of Internal Medicine, School of Medicine, Yamaguchi University, 1-1-1 Minami Kogushi, Ube, Yamaguchi 755-8505, Japan.
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Katoh Y, Niimi M, Yamamoto Y, Kawamura T, Morimoto-Ishizuka T, Sawada M, Takemori H, Yamatodani A. Histamine production by cultured microglial cells of the mouse. Neurosci Lett 2001; 305:181-4. [PMID: 11403935 DOI: 10.1016/s0304-3940(01)01835-3] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We previously reported that cells other than mast cells or neurons could synthesize histamine in response to lipopolysaccharide (LPS) or interleukin 1beta in the rat brain. To identify the responsible cells, we examined histidine decarboxylase (HDC) activity and the expression of HDC mRNA in GMI 6-3 mouse microglial cells. Both the activity and mRNA for HDC in GMI 6-3 cells were induced by LPS treatment, and the induction was sensitive to calmodulin-dependent kinase II inhibitor, KN62. These findings indicate that microglia is a third cell type producing histamine in the brain.
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Affiliation(s)
- Y Katoh
- Department of Medical Physics, School of Allied Health Sciences, Faculty of Medicine, Osaka University, 1-7 Yamadaoka, Suita, 565-0871, Osaka, Japan
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Matsumoto M, Katoh Y, Nakamura Y, Shimakura Y, Hagihara M, Yabe H, Yabe M, Inokuchi S, Kato S, Shimamura K. Injection of CD4+ and CD8+ cells with donor or host accessory cells induces acute graft-vs-host disease in human skin in immunodeficient mice. Exp Hematol 2001; 29:720-7. [PMID: 11378267 DOI: 10.1016/s0301-472x(01)00639-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE We examined cell subsets with respect to cutaneous graft-vs-host disease by cell sorting selection of subsets of human mononuclear cells and injecting the subsets subcutaneously in a mouse model. MATERIALS AND METHODS Cell suspensions containing cultured human epidermal cells and dermal fibroblasts from a single donor mixed with lymphoid cell subsets positively selected using the FACSVantage cell sorting instrument and/or MACS cell isolation kits from unrelated individuals were injected into immunodeficient mice. This model is known to generate human skin with histologic findings similar to human graft-vs-host disease. RESULTS Donor T-cell subsets CD4(+) and CD8(+) plus either host or donor CD14(+) cells were necessary to cause acute cutaneous graft-vs-host disease. Although graft-vs-host disease can result from recognition of class I antigens expressed on human cutaneous cells by donor peripheral blood mononuclear cells, additional recognition of class II antigens expressed on host mononuclear cells resulted in more severe histologic manifestations. Dendritic cells that differentiated from donor and host monocytes also showed competent accessory cell function in this system. CONCLUSIONS Based on this model, human cutaneous graft-vs-host disease was caused by donor CD4(+) cells and CD8(+) cells activated through recognition of host antigens, including class I and class II antigens presented by either donor or host CD14(+) cells or dendritic cells.
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Affiliation(s)
- M Matsumoto
- Department of Pathology, Tokai University School of Medicine, Kanagawa, Japan
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45
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Chaudhari P, Lacey J, Doyle J, Galligan E, Lien SC, Callegari A, Hougham G, Lang ND, Andry PS, John R, Yang KH, Lu M, Cai C, Speidell J, Purushothaman S, Ritsko J, Samant M, Stöhr J, Nakagawa Y, Katoh Y, Saitoh Y, Sakai K, Satoh H, Odahara S, Nakano H, Nakagaki J, Shiota Y. Atomic-beam alignment of inorganic materials for liquid-crystal displays. Nature 2001; 411:56-9. [PMID: 11333974 DOI: 10.1038/35075021] [Citation(s) in RCA: 351] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The technique used to align liquid crystals-rubbing the surface of a substrate on which a liquid crystal is subsequently deposited-has been perfected by the multibillion-dollar liquid-crystal display industry. However, it is widely recognized that a non-contact alignment technique would be highly desirable for future generations of large, high-resolution liquid-crystal displays. A number of alternative alignment techniques have been reported, but none of these have so far been implemented in large-scale manufacturing. Here, we report a non-contact alignment process, which uses low-energy ion beams impinging at a glancing angle on amorphous inorganic films, such as diamond-like carbon. Using this approach, we have produced both laptop and desktop displays in pilot-line manufacturing, and found that displays of higher quality and reliability could be made at a lower cost than the rubbing technique. The mechanism of alignment is explained by adopting a random network model of atomic arrangement in the inorganic films. Order is induced by exposure to an ion beam because unfavourably oriented rings of atoms are selectively destroyed. The planes of the remaining rings are predominantly parallel to the direction of the ion beam.
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Affiliation(s)
- P Chaudhari
- IBM Watson Research Centre, PO Box 218, Yorktown Heights, New York 10598, USA.
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46
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Raffray A, Jones R, Aiello G, Billone M, Giancarli L, Golfier H, Hasegawa A, Katoh Y, Kohyama A, Nishio S, Riccardi B, Tillack M. Design and material issues for high performance SiCf/SiC-based fusion power cores. Fusion Engineering and Design 2001. [DOI: 10.1016/s0920-3796(01)00181-8] [Citation(s) in RCA: 117] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Medina V, Shinkai K, Shirono M, Tanaka N, Katoh Y. Effect of bonding variables on the shear bond strength and interfacial morphology of a one-bottle adhesive. Oper Dent 2001; 26:277-86. [PMID: 11357571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
This study's objectives were: 1) to determine the combination of bonding procedures (with or without acid etching, moist or dry substrate, one or two applications of primer/adhesive) that would produce the highest shear bond strength of Prime & Bond and Dyract AP and 2) to characterize the resin-dentin/enamel interface produced by these bonding procedures. Ninety-six bovine incisors were randomly assigned to eight groups for shear bond testing to enamel (n = 6) and dentin (n = 6). Prime & Bond and Dyract AP were applied and cured following manufacturers' instructions. Shear bond testing was conducted in a Universal Testing Machine. Thirty-two bovine incisors were sectioned to produce blocks with enamel and dentin, then bonded in pairs for evaluation of interfacial morphology. They were polished and argon ion-etched using a high-speed argon ion-etching machine and examined by SEM. The groups where enamel was etched, kept moist or dry and received a single application of Prime & Bond produced the highest shear bond strength. Dentin bond strengths were high in the groups where dentin was etched and kept moist. The number of Prime & Bond applications had no effect on dentin bond strength. Acid etching results in better adaptation of Prime & Bond to enamel and dentin regardless of whether moisture is present.
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Affiliation(s)
- V Medina
- Department of Operative Dentistry, School of Dentistry at Niigata, The Nippon Dental University, 1-8 Hamaura-cho, Niigata 951-8580, Japan
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48
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Yamaguchi T, Yokokawa M, Suzuki M, Higashide S, Katoh Y, Sugiyama S, Misaki T. The effect of immunosuppression on aortic dilatation in a rat aneurysm model. Surg Today 2001; 30:1093-9. [PMID: 11193741 DOI: 10.1007/s005950070007] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
This study was conducted to investigate whether systemic immunosuppression attenuated aortic dilatation in a rat aneurysm model. Sprague-Dawley rats were subjected to elastase infusion of the infrarenal aorta and divided into two groups of 12 rats each. The immunosuppression group (group 1) was given subcutaneous injections of cyclosporine A (5 mg/kg per day), azathioprine (2 mg/kg per day), and methylprednisolone (2 mg/kg per day) from the operative day until postoperative day (POD) 6. An additional subcutaneus injection of cyclophosphamide 30 mg/kg was also given on the operative day. The control group (group 2) was given subcutaneous injections of saline. Relaparotomy was performed on POD 7. After measurement of the aortic diameter, aortography and ultrasonography were performed in three rats from each group, following which the aortas were excised for histologic examination. The aortic diameter was significantly smaller in group 1 (2.58 +/- 0.37 mm) than in group 2 (6.21 +/- 1.74 mm) (P < 0.01) and the aortic lumen was slightly dilated in group 1, whereas it was spherically dilated in group 2. Total loss of elastic tissue was seen in both groups. Inflammatory cell infiltration and collagen fiber fragmentation were noted in group 2, whereas very little inflammatory cell infiltration and well-preserved collagen fibers were seen in group 1. These findings showed that immunosuppression attenuates aortic dilatation, partly by preserving the collagen fibers, in this rat aneurysm model.
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Affiliation(s)
- T Yamaguchi
- First Department of Surgery, Toyama Medical and Pharmaceutical University, Japan
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Yamaguchi T, Yokokawa M, Suzuki M, Higashide S, Katoh Y, Sugiyama S, Misaki T. The time course of elastin fiber degeneration in a rat aneurysm model. Surg Today 2001; 30:727-31. [PMID: 10955737 DOI: 10.1007/s005950070085] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Previous findings vary regarding the timing and cause of elastin fiber degeneration in the elastase-induced rat abdominal aortic aneurysm model. We examined the timing and cause of elastin fiber degeneration after elastase infusion using two different elastase infusion times. Twenty-four Sprague-Dawley rats were divided into two groups. The infrarenal abdominal aorta was infused with 15 U of elastase for 15 min (n = 12, 15-min infusion group) or 30 min (n = 12, 30-min infusion group). In each group, three rats were killed immediately and 1, 3, and 7 days after infusion, and then the aortas were excised for a histologic examination. Elastin fibers did not stain, even immediately after elastase infusion, in the 30-min infusion group. The degeneration of elastin fibers did not progress in the 15-min infusion group during the period of observation. Inflammatory cells infiltrated mainly to the adventitia near regions where the degeneration of elastin fibers spread totally through the aortic media. Elastin fibers degenerate immediately after elastase infusion and thus seem to degenerate not due to endogenous proteinases that are produced by the infiltrating cells, but due to the exogenously infused elastase itself. Inflammatory cell infiltration was thus found to be a result of the degeneration of elastin fibers in this model.
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Affiliation(s)
- T Yamaguchi
- First Department of Surgery, Toyama Medical and Pharmaceutical University, Japan
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Yamaguchi T, Yokokawa M, Suzuki M, Higashide S, Katoh Y, Sugiyama S, Misaki T. Morphologic changes in the aorta during elastase infusion in the rat aneurysm model. J Surg Res 2001; 95:161-6. [PMID: 11162040 DOI: 10.1006/jsre.2000.6025] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND The morphologic changes in the aorta during elastase infusion, which have not previously been investigated, were examined in the rat abdominal aortic aneurysm model. MATERIALS AND METHODS A total of 80 Wistar rats were divided into five groups. A 1.0-cm segment of infra-renal abdominal aorta was infused with 25 U of elastase in 1 mL saline for 10 (n = 14), 20 (n = 14), 30 (n = 14), 60 (n = 19), or 120 min (n = 19). In the 120-min group, transparency and aortic diameter were recorded every 10 min. In each group, 7 rats were killed immediately after infusion. The aortas were excised for histologic examination. The aortic diameters were measured 7 days after infusion in the remaining rats. RESULTS The infused aorta became transparent within 50 min of elastase infusion. The aortic diameter increased rapidly for the first 30 min of infusion. Histologically, the elastic tissue was completely absent after 60 min of infusion. The aortic diameters in the 60- and 120-min groups were not significantly different 7 days after infusion. CONCLUSIONS Morphologic changes in the infused aorta are complete after 60 min of elastase infusion. It may be possible to shorten the elastase infusion time from 120 to 60 min in this model.
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Affiliation(s)
- T Yamaguchi
- First Department of Surgery, Toyama Medical and Pharmaceutical University, Toyama, Japan.
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