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Yokoya T, Terashima K, Takeda A, Fukura T, Fujiwara H, Muro T, Kinoshita T, Kato H, Yamasaki S, Oguchi T, Wakita T, Muraoka Y, Matsushita T. Asymmetric Phosphorus Incorporation in Homoepitaxial P-Doped (111) Diamond Revealed by Photoelectron Holography. Nano Lett 2019; 19:5915-5919. [PMID: 31373825 DOI: 10.1021/acs.nanolett.9b01481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Diamond has two crystallographically inequivalent sites in the unit cell. In doped diamond, dopant occupation in the two sites is expected to be equal. Nevertheless, preferential dopant occupation during growth under nonequilibrium conditions is of fundamental importance, for example, to enhance the properties of nitrogen-vacancy (N-V) centers; therefore, this is a promising candidate for a qubit. However, the lack of suitable experimental techniques has made it difficult to study the crystal- and chemical-site-resolved local structures of dopants. Here, we confirm the identity of two chemical sites with asymmetric dopant incorporation in the diamond structure, via the photoelectron holography (PEH) of heavily phosphorus (P)-doped diamond prepared by chemical vapor deposition. One is substitutionally incorporated P with preferential site occupations and the other can be attributed to a PV split vacancy complex with preferential orientation. The present study shows that PEH is a valuable technique to study the local structures around dopants with a resolution of crystallographically inequivalent but energetically equivalent sites/orientations. Such information provides strategies to improve the properties of dopant related-complexes in which alignment is crucial for sensing of magnetic field or quantum spin register using N-V centers in diamond.
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Affiliation(s)
- T Yokoya
- Research Institute for Interdisciplinary Science (RIIS) , Okayama University , Okayama 700-8530 , Japan
- Graduate School of Science and Technology , Okayama University , Okayama 700-8530 , Japan
| | - K Terashima
- Research Institute for Interdisciplinary Science (RIIS) , Okayama University , Okayama 700-8530 , Japan
| | - A Takeda
- Graduate School of Science and Technology , Okayama University , Okayama 700-8530 , Japan
| | - T Fukura
- Graduate School of Science and Technology , Okayama University , Okayama 700-8530 , Japan
| | - H Fujiwara
- Graduate School of Science and Technology , Okayama University , Okayama 700-8530 , Japan
| | - T Muro
- Japan Synchrotron Radiation Research Institute (JASRI) , 1-1-1 Kouto, Sayo , Hyogo 679-5198 , Japan
| | - T Kinoshita
- Japan Synchrotron Radiation Research Institute (JASRI) , 1-1-1 Kouto, Sayo , Hyogo 679-5198 , Japan
| | - H Kato
- Advanced Power Electronics Research Center , National Institute of Advanced Industrial Science and Technology (AIST) , Tsukuba Center 2, Tsukuba , Ibaraki 305-8568 , Japan
| | - S Yamasaki
- Advanced Power Electronics Research Center , National Institute of Advanced Industrial Science and Technology (AIST) , Tsukuba Center 2, Tsukuba , Ibaraki 305-8568 , Japan
| | - T Oguchi
- Institute of Scientific and Industrial Research , Osaka University , 8-1 Mihogaoka, Ibaraki , Osaka 567-0047 , Japan
| | - T Wakita
- Research Institute for Interdisciplinary Science (RIIS) , Okayama University , Okayama 700-8530 , Japan
| | - Y Muraoka
- Research Institute for Interdisciplinary Science (RIIS) , Okayama University , Okayama 700-8530 , Japan
- Graduate School of Science and Technology , Okayama University , Okayama 700-8530 , Japan
| | - T Matsushita
- Japan Synchrotron Radiation Research Institute (JASRI) , 1-1-1 Kouto, Sayo , Hyogo 679-5198 , Japan
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2
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Honda K, Seike M, Oribe J, Endo M, Arakawa M, Tokoro M, Iwao M, Mori T, Nishimura J, Takahashi Y, Omori K, Yamashita T, Muro T, Murakami K. Usefulness of semiquantitative PCR-Invader assay for selecting candidates for daclatasvir plus asunaprevir combination therapy among patients with hepatitis C virus genotype 1b. Hepatol Res 2018; 48:255-263. [PMID: 29080280 DOI: 10.1111/hepr.12994] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2017] [Revised: 10/13/2017] [Accepted: 10/24/2017] [Indexed: 02/06/2023]
Abstract
AIMS PCR-Invader is a highly sensitive assay for detecting non-structural protein 5A (NS5A) resistance-associated variants (RAVs) of hepatitis C virus (HCV). Here, we validated the accuracy of the semiquantitative PCR-Invader (SQ-PI) assay compared to direct sequencing (DS) for identifying NS5A RAVs, and we evaluated the treatment efficacy of daclatasvir plus asunaprevir (DCV + ASV) for patients judged to be non-positive for NS5A RAVs by SQ-PI. METHODS Detection rates of NS5A RAVs by SQ-PI and DS were compared for 204 patients with HCV genotype 1b. Patients with non-positive results for NS5A RAVs by SQ-PI were treated by DCV + ASV, and the efficacy of this treatment was examined. RESULTS All samples judged as negative for NS5A RAVs by SQ-PI were similarly judged by DS. However, 29.7% of samples judged as negative for Y93H by DS were judged as weakly positive or positive by SQ-PI. Among 108 patients who were judged as negative by SQ-PI and treated by DCV + ASV, rates of sustained virologic response at 24 weeks (SVR24) were 96.3% in intention-to-treat analysis and 99.0% in patients who completed treatment. Among patients who were weakly positive for Y93H on SQ-PI, the SVR24 rate was 95.0% (19/20). This rate was 100% (78/78) in patients who were negative for Y93H on SQ-PI and completed treatment. CONCLUSION Treatment efficacy of DCV + ASV was extremely high among patients who were non-positive for NS5A RAVs on SQ-PI, especially for patients with negative results.
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Affiliation(s)
- Koichi Honda
- Department of Gastroenterology, Faculty of Medicine, Oita University, Yufu City, Japan
| | - Masataka Seike
- Department of Gastroenterology, Faculty of Medicine, Oita University, Yufu City, Japan
| | - Junya Oribe
- Department of Gastroenterology, Faculty of Medicine, Oita University, Yufu City, Japan
| | - Mizuki Endo
- Department of Gastroenterology, Faculty of Medicine, Oita University, Yufu City, Japan
| | - Mie Arakawa
- Department of Gastroenterology, Faculty of Medicine, Oita University, Yufu City, Japan
| | - Masanori Tokoro
- Department of Gastroenterology, Faculty of Medicine, Oita University, Yufu City, Japan
| | - Masao Iwao
- Department of Gastroenterology, Faculty of Medicine, Oita University, Yufu City, Japan
| | | | - Junko Nishimura
- Department of Gastroenterology, Oita Cardiovascular Hospital, Oita City, Japan
| | - Yukou Takahashi
- Department of Gastroenterology, Oita Cardiovascular Hospital, Oita City, Japan
| | - Kaoru Omori
- Department of Internal Medicine, Sato Daiichi Hospital, Usa City, Japan
| | - Tsutomu Yamashita
- Department of Gastroenterology and Hepatology, National Hospital Organization Oita Medical Center, Oita City, Japan
| | - Toyokichi Muro
- Department of Gastroenterology and Hepatology, National Hospital Organization Oita Medical Center, Oita City, Japan
| | - Kazunari Murakami
- Department of Gastroenterology, Faculty of Medicine, Oita University, Yufu City, Japan
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3
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Kuroda K, Tomita T, Suzuki MT, Bareille C, Nugroho AA, Goswami P, Ochi M, Ikhlas M, Nakayama M, Akebi S, Noguchi R, Ishii R, Inami N, Ono K, Kumigashira H, Varykhalov A, Muro T, Koretsune T, Arita R, Shin S, Kondo T, Nakatsuji S. Evidence for magnetic Weyl fermions in a correlated metal. Nat Mater 2017; 16:1090-1095. [PMID: 28967918 DOI: 10.1038/nmat4987] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 08/21/2017] [Indexed: 06/07/2023]
Abstract
Weyl fermions have been observed as three-dimensional, gapless topological excitations in weakly correlated, inversion-symmetry-breaking semimetals. However, their realization in spontaneously time-reversal-symmetry-breaking phases of strongly correlated materials has so far remained hypothetical. Here, we report experimental evidence for magnetic Weyl fermions in Mn3Sn, a non-collinear antiferromagnet that exhibits a large anomalous Hall effect, even at room temperature. Detailed comparison between angle-resolved photoemission spectroscopy (ARPES) measurements and density functional theory (DFT) calculations reveals significant bandwidth renormalization and damping effects due to the strong correlation among Mn 3d electrons. Magnetotransport measurements provide strong evidence for the chiral anomaly of Weyl fermions-namely, the emergence of positive magnetoconductance only in the presence of parallel electric and magnetic fields. Since weak magnetic fields (approximately 10 mT) are adequate to control the distribution of Weyl points and the large fictitious fields (equivalent to approximately a few hundred T) produced by them in momentum space, our discovery lays the foundation for a new field of science and technology involving the magnetic Weyl excitations of strongly correlated electron systems such as Mn3Sn.
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Affiliation(s)
- K Kuroda
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - T Tomita
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
- CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan
| | - M-T Suzuki
- CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan
- RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - C Bareille
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - A A Nugroho
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
- Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10, 40132 Bandung, Indonesia
| | - P Goswami
- Condensed Matter Theory Center and Joint Quantum Institute, Department of Physics, University of Maryland, College Park, Maryland 20742- 4111, USA
- Department of Physics and Astronomy, 2145 Sheridan Road, Evanston, Illinois 60208, USA
| | - M Ochi
- Department of Physics, Osaka University, Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - M Ikhlas
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
- CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan
| | - M Nakayama
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - S Akebi
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - R Noguchi
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - R Ishii
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - N Inami
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - K Ono
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - H Kumigashira
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - A Varykhalov
- Helmholtz-Zentrum Berlin für Materialien und Energie, Elektronenspeicherring BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - T Muro
- Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo, Hyogo 679-5198, Japan
| | - T Koretsune
- CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan
- RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - R Arita
- CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan
- RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - S Shin
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - Takeshi Kondo
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - S Nakatsuji
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
- CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan
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4
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Kawashima M, Hitomi Y, Aiba Y, Nishida N, Kojima K, Kawai Y, Nakamura H, Tanaka A, Zeniya M, Hashimoto E, Ohira H, Yamamoto K, Abe M, Nakao K, Yamagiwa S, Kaneko S, Honda M, Umemura T, Ichida T, Seike M, Sakisaka S, Harada M, Yokosuka O, Ueno Y, Senju M, Kanda T, Shibata H, Himoto T, Murata K, Miyake Y, Ebinuma H, Taniai M, Joshita S, Nikami T, Ota H, Kouno H, Kouno H, Nakamuta M, Fukushima N, Kohjima M, Komatsu T, Komeda T, Ohara Y, Muro T, Yamashita T, Yoshizawa K, Nakamura Y, Shimada M, Hirashima N, Sugi K, Ario K, Takesaki E, Naganuma A, Mano H, Yamashita H, Matsushita K, Yamauchi K, Makita F, Nishimura H, Furuta K, Takahashi N, Kikuchi M, Masaki N, Tanaka T, Tamura S, Mori A, Yagi S, Shirabe K, Komori A, Migita K, Ito M, Nagaoka S, Abiru S, Yatsuhashi H, Yasunami M, Shimoda S, Harada K, Egawa H, Maehara Y, Uemoto S, Kokudo N, Takikawa H, Ishibashi H, Chayama K, Mizokami M, Nagasaki M, Tokunaga K, Nakamura M. Genome-wide association studies identify PRKCB as a novel genetic susceptibility locus for primary biliary cholangitis in the Japanese population. Hum Mol Genet 2017; 26:650-659. [PMID: 28062665 DOI: 10.1093/hmg/ddw406] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 11/23/2016] [Indexed: 12/13/2022] Open
Abstract
A previous genome-wide association study (GWAS) performed in 963 Japanese individuals (487 primary biliary cholangitis [PBC] cases and 476 healthy controls) identified TNFSF15 (rs4979462) and POU2AF1 (rs4938534) as strong susceptibility loci for PBC. In this study, we performed GWAS in additional 1,923 Japanese individuals (894 PBC cases and 1,029 healthy controls), and combined the results with the previous data. This GWAS, together with a subsequent replication study in an independent set of 7,024 Japanese individuals (512 PBC cases and 6,512 healthy controls), identified PRKCB (rs7404928) as a novel susceptibility locus for PBC (odds ratio [OR] = 1.26, P = 4.13 × 10-9). Furthermore, a primary functional variant of PRKCB (rs35015313) was identified by genotype imputation using a phased panel of 1,070 Japanese individuals from a prospective, general population cohort study and subsequent in vitro functional analyses. These results may lead to improved understanding of the disease pathways involved in PBC, forming a basis for prevention of PBC and development of novel therapeutics.
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Affiliation(s)
- Minae Kawashima
- Department of Human Genetics, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yuki Hitomi
- Department of Human Genetics, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yoshihiro Aiba
- Clinical Research Center, National Hospital Organization (NHO) Nagasaki Medical Center, Omura, Japan
| | - Nao Nishida
- Department of Human Genetics, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.,The Research Center for Hepatitis and Immunology, National Center for Global Health and Medicine, Ichikawa, Japan
| | - Kaname Kojima
- Division of Biomedical Information Analysis, Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan
| | - Yosuke Kawai
- Division of Biomedical Information Analysis, Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan
| | - Hitomi Nakamura
- Clinical Research Center, National Hospital Organization (NHO) Nagasaki Medical Center, Omura, Japan
| | - Atsushi Tanaka
- Department of Medicine, Teikyo University School of Medicine, Tokyo, Japan
| | - Mikio Zeniya
- Department of Gastroenterology and Hepatology, Tokyo Jikei University School of Medicine, Tokyo, Japan
| | - Etsuko Hashimoto
- Department of Medicine and Gastroenterology, Tokyo Women's Medical University, Tokyo, Japan
| | - Hiromasa Ohira
- Department of Gastroenterology and Rheumatic Diseases, Fukushima Medical University of Medicine, Fukushima, Japan
| | - Kazuhide Yamamoto
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Masanori Abe
- Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Matsuyama, Japan
| | - Kazuhiko Nakao
- Department of Gastroenterology and Hepatology, Nagasaki University Graduate School of Biomedical Sciences, Nagaski, Japan
| | - Satoshi Yamagiwa
- Division of Gastroenterology and Hepatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Shuichi Kaneko
- Department of Gastroenterology, Kanazawa University Graduate School of Medicine, Kanazawa, Japan
| | - Masao Honda
- Department of Gastroenterology, Kanazawa University Graduate School of Medicine, Kanazawa, Japan
| | - Takeji Umemura
- Division of Gastroenterology and Hepatology, Department of Medicine, Shinshu University School of Medicine, Matsumoto, Japan
| | - Takafumi Ichida
- Department of Gastroenterology and Hepatology, Juntendo University Shizuoka Hospital, Shizuoka, Japan
| | - Masataka Seike
- First Department of Internal Medicine, Faculty of Medicine, Oita University, Oita, Japan
| | - Shotaro Sakisaka
- Department of Gastroenterology and Medicine, Fukuoka University School of Medicine, Fukuoka, Japan
| | - Masaru Harada
- The Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Osamu Yokosuka
- Department of Medicine and Clinical Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Yoshiyuki Ueno
- Department of Gastroenterology, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Michio Senju
- The Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Tatsuo Kanda
- Department of Medicine and Clinical Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Hidetaka Shibata
- Department of Gastroenterology and Hepatology, Nagasaki University Graduate School of Biomedical Sciences, Nagaski, Japan
| | - Takashi Himoto
- Department of Medical Technology, Kagawa Prefectural University of Health Sciences, Kagawa, Japan
| | - Kazumoto Murata
- The Research Center for Hepatitis and Immunology, National Center for Global Health and Medicine, Ichikawa, Japan
| | - Yasuhiro Miyake
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Hirotoshi Ebinuma
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Keio Graduate School of Medicine, Tokyo, Japan
| | - Makiko Taniai
- Department of Medicine and Gastroenterology, Tokyo Women's Medical University, Tokyo, Japan
| | - Satoru Joshita
- Division of Gastroenterology and Hepatology, Department of Medicine, Shinshu University School of Medicine, Matsumoto, Japan
| | - Toshiki Nikami
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Hajime Ota
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Hiroshi Kouno
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Hirotaka Kouno
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Makoto Nakamuta
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Nobuyoshi Fukushima
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Motoyuki Kohjima
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Tatsuji Komatsu
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Toshiki Komeda
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Yukio Ohara
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Toyokichi Muro
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Tsutomu Yamashita
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Kaname Yoshizawa
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Yoko Nakamura
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Masaaki Shimada
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Noboru Hirashima
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Kazuhiro Sugi
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Keisuke Ario
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Eiichi Takesaki
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Atsushi Naganuma
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Hiroshi Mano
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Haruhiro Yamashita
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Kouki Matsushita
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Kazuhiko Yamauchi
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Fujio Makita
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Hideo Nishimura
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Kiyoshi Furuta
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Naohiro Takahashi
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Masahiro Kikuchi
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Naohiko Masaki
- Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
| | - Tomohiro Tanaka
- Organ Transplantation Service, The University of Tokyo, Tokyo, Japan
| | - Sumito Tamura
- Hepatobiliarypancreatic Surgery Division, Artificial Organ and Transplantation Division, Department of Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Akira Mori
- Division of Hepato-Biliary-Pancreatic and Transplant Surgery, Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Shintaro Yagi
- Division of Hepato-Biliary-Pancreatic and Transplant Surgery, Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Ken Shirabe
- Department of Surgery and Science, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Atsumasa Komori
- Clinical Research Center, National Hospital Organization (NHO) Nagasaki Medical Center, Omura, Japan.,Department of Hepatology, Nagasaki University Graduate School of Biomedical Sciences, Omura, Japan
| | - Kiyoshi Migita
- Clinical Research Center, National Hospital Organization (NHO) Nagasaki Medical Center, Omura, Japan.,Department of Hepatology, Nagasaki University Graduate School of Biomedical Sciences, Omura, Japan
| | - Masahiro Ito
- Clinical Research Center, National Hospital Organization (NHO) Nagasaki Medical Center, Omura, Japan.,Department of Hepatology, Nagasaki University Graduate School of Biomedical Sciences, Omura, Japan
| | - Shinya Nagaoka
- Clinical Research Center, National Hospital Organization (NHO) Nagasaki Medical Center, Omura, Japan
| | - Seigo Abiru
- Clinical Research Center, National Hospital Organization (NHO) Nagasaki Medical Center, Omura, Japan
| | - Hiroshi Yatsuhashi
- Clinical Research Center, National Hospital Organization (NHO) Nagasaki Medical Center, Omura, Japan.,Department of Hepatology, Nagasaki University Graduate School of Biomedical Sciences, Omura, Japan
| | - Michio Yasunami
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Shinji Shimoda
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Kenichi Harada
- Department of Human Pathology, Kanazawa University Graduate School of Medicine, Kanazawa, Japan
| | - Hiroto Egawa
- Department of Surgery, Institute of Gastroenterology, Tokyo Women's Medical University, Tokyo, Japan
| | - Yoshihiko Maehara
- Department of Surgery and Science, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Shinji Uemoto
- Division of Hepato-Biliary-Pancreatic and Transplant Surgery, Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Norihiro Kokudo
- Hepatobiliarypancreatic Surgery Division, Artificial Organ and Transplantation Division, Department of Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Hajime Takikawa
- Department of Medicine, Teikyo University School of Medicine, Tokyo, Japan
| | - Hiromi Ishibashi
- Clinical Research Center, National Hospital Organization (NHO) Nagasaki Medical Center, Omura, Japan.,Department of Hepatology, Nagasaki University Graduate School of Biomedical Sciences, Omura, Japan
| | - Kazuaki Chayama
- Department of Gastroenterology and Metabolism, Applied Life Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Masashi Mizokami
- The Research Center for Hepatitis and Immunology, National Center for Global Health and Medicine, Ichikawa, Japan
| | - Masao Nagasaki
- Division of Biomedical Information Analysis, Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan
| | - Katsushi Tokunaga
- Department of Human Genetics, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Minoru Nakamura
- Clinical Research Center, National Hospital Organization (NHO) Nagasaki Medical Center, Omura, Japan.,Headquaters of PBC Research in the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ), Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan.,Department of Hepatology, Nagasaki University Graduate School of Biomedical Sciences, Omura, Japan.,Headquaters of gp210 Working Group in Intractable Liver Disease Research Project Team of the Ministry of Health and Welfare in Japan, Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan
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Honda K, Seike M, Oribe J, Endo M, Arakawa M, Syo H, Iwao M, Tokoro M, Nishimura J, Mori T, Yamashita T, Fukuchi S, Muro T, Murakami K. Risk factors for deterioration of long-term liver function after radiofrequency ablation therapy. World J Hepatol 2016; 8:597-604. [PMID: 27168872 PMCID: PMC4858624 DOI: 10.4254/wjh.v8.i13.597] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 03/13/2016] [Accepted: 03/25/2016] [Indexed: 02/06/2023] Open
Abstract
AIM: To identify factors that influence long-term liver function following radiofrequency ablation (RFA) in patients with viral hepatitis-related hepatocellular carcinoma.
METHODS: A total of 123 patients with hepatitis B virus- or hepatitis C virus-related hepatocellular car-cinoma (HCC) (n = 12 and n = 111, respectively) were enrolled. Cumulative rates of worsening Child-Pugh (CP) scores (defined as a 2-point increase) were examined.
RESULTS: CP score worsening was confirmed in 22 patients over a mean follow-up period of 43.8 ± 26.3 mo. Multivariate analysis identified CP class, platelet count, and aspartate aminotransferase levels as signi-ficant predictors of a worsening CP score (P = 0.000, P = 0.011 and P = 0.024, respectively). In contrast, repeated RFA was not identified as a risk factor for liver function deterioration.
CONCLUSION: Long-term liver function following RFA was dependent on liver functional reserve, the degree of fibrosis present, and the activity of the hepatitis condition for this cohort. Therefore, in order to maintain liver function for an extended period following RFA, suppression of viral hepatitis activity is important even after the treatment of HCC.
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Migita K, Jiuchi Y, Furukawa H, Nakamura M, Komori A, Yasunami M, Kozuru H, Abiru S, Yamasaki K, Nagaoka S, Hashimoto S, Bekki S, Yoshizawa K, Shimada M, Kouno H, Kamitsukasa H, Komatsu T, Hijioka T, Nakamuta M, Naganuma A, Yamashita H, Nishimura H, Ohta H, Nakamura Y, Ario K, Oohara Y, Sugi K, Tomizawa M, Sato T, Takahashi H, Muro T, Makita F, Mita E, Sakai H, Yatsuhashi H. Lack of association between the CARD10 rs6000782 polymorphism and type 1 autoimmune hepatitis in a Japanese population. BMC Res Notes 2015; 8:777. [PMID: 26652023 PMCID: PMC4677039 DOI: 10.1186/s13104-015-1733-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 11/23/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Previous genome-wide association studies have evaluated the impact of common genetic variants and identified several non-HLA risk loci associated with autoimmune liver diseases. More recent genome-wide association studies and replication analyses reported an association between variants of the CARD10 polymorphism rs6000782 and risk of type 1 autoimmune hepatitis (AIH). In this case-control study, we genotyped 326 Japanese AIH patients and 214 control subjects. RESULTS Genomic DNA from 540 individuals of Japanese origin, including 326 patients with type-1 AIH and 214 healthy controls, was analyzed for two single nucleotide polymorphisms (SNPs) in the CARD10 gene. We selected CARD10 rs6000782 SNPs and genotyped these using PCR-RFLP method and direct sequencing. The Chi square test revealed that the rs6000782 variant alle (c) was not associated with the susceptibility for AIH in a Japanese population [p = 0.376, odds ratio (OR) 1.271, 95 % confidence interval (CI) 0.747-2.161] in an allele model. Our data also showed that CARD10 rs6000782 variants were not associated with AIH or with the clinical parameters of AIH. CONCLUSIONS In this study we examined an association between rs6000782 SNPs in the CARD10 gene and type-1 AIH. Results showed no significant association of rs62000782 with type-1 AIH in a Japanese population. This study demonstrated no association between CARD10 rs6000782 variants and AIH in a Japanese population.
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Affiliation(s)
- Kiyoshi Migita
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan. .,Clinical Research Center, NHO Nagasaki Medical Center, Kubara 2-1001-1, Omura, 856-8652, Japan.
| | - Yuka Jiuchi
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Hiroshi Furukawa
- Department of Rheumatology, NHO Sagamihara Hospital, Minamikusakuradai 18-1, Sagamihara, Kanagawa, 252-0392, Japan.
| | - Minoru Nakamura
- Department of Hepatology, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto 1-12-4, Ngasaki, Nagasaki, 852-8523, Japan.
| | - Atsumasa Komori
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Michio Yasunami
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Sakamoto 1-12-4, Ngasaki, Nagasaki, 852-8523, Japan.
| | - Hideko Kozuru
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Seigo Abiru
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Kazumi Yamasaki
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Shinya Nagaoka
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Satoru Hashimoto
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Shigemune Bekki
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Kaname Yoshizawa
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Masaaki Shimada
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Hiroshi Kouno
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Hiroshi Kamitsukasa
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Tatsuji Komatsu
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Taizo Hijioka
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Makoto Nakamuta
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Atsushi Naganuma
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Haruhiro Yamashita
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Hideo Nishimura
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Hajime Ohta
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Yoko Nakamura
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Keisuke Ario
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Yukio Oohara
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Kazuhiro Sugi
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Minoru Tomizawa
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Takeaki Sato
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Hironao Takahashi
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Toyokichi Muro
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Fujio Makita
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Eiji Mita
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Hironori Sakai
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
| | - Hiroshi Yatsuhashi
- NHO-AIH study group, Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki, 856-8562, Japan.
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Muro T, Higuchi N, Imamura M, Nakagawa H, Honda M, Nakao K, Izumikawa K, Sasaki H, Kitahara T. Post-operative infection of endoscopic submucosal dissection of early colorectal neoplasms: a case-controlled study using a Japanese database. J Clin Pharm Ther 2015; 40:573-577. [PMID: 26249257 DOI: 10.1111/jcpt.12313] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Accepted: 07/02/2015] [Indexed: 11/30/2022]
Abstract
WHAT IS KNOWN AND OBJECTIVE Endoscopic submucosal dissection of early colorectal neoplasms (ESD-ECN) is known to be an operation with risk of contamination, possibly requiring pre-operative antimicrobial prophylaxis for the prevention of post-operative infection. However, an evaluation of the need for pre-operative antimicrobial prophylaxis for ESD-ECN has yet to be reported. The objective of this study was to determine whether pre-operative antimicrobial prophylaxis is associated with a reduced incidence of post-operative infection following ESD-ECN. METHODS The present retrospective case-controlled study utilized a database built from the medical records of 14 university hospitals throughout Japan. Patients who were admitted and discharged from the hospital from April 2012 to October 2013 and who had undergone ESD-ECN were included in the study. Patients who had been undergone any other operation during their course of hospitalization, and patients who were prescribed antimicrobial agents for reasons other than post-operative infection or for prophylaxis were excluded. Characteristics of the study population, pre-operative antimicrobial prophylaxis and antimicrobial therapy for post-operative infection were investigated. In addition, we compared the characteristics of patients with post-operative infection (PI) and those with no post-operative infection (NPI). Univariate analyses were used to estimate the odds ratios (OR) and 95% confidence intervals (95% CI). RESULTS AND DISCUSSION We obtained the records of 522 patients who had undergone ESD-ECN from the database. After application of exclusion criteria, 421 patients were enrolled. The post-operative infection rate was 1·2%. Peritonitis was found most to be the most common post-operative infection (44%). Pre-operative antimicrobial prophylaxis was used for 314 patients (75%), with a median duration of 3·0 (range 1-11) days. Cefotiam was most frequently prescribed for pre-operative antimicrobial prophylaxis (56%). Antimicrobial therapies were started 1-10 days after ESD-ECN for a duration of 1-14 days. Pre-operative antimicrobial prophylaxis was not associated with post-operative infection rate, with an OR (95% CI) of 0·73 (0·08-6·61). However, digestive tract perforation was shown to be associated with post-operative infection and had an OR (95% CI) of 17·1 (1·66-176·45). WHAT IS NEW AND CONCLUSION Post-operative infection is an exceedingly rare event following ESD-ECN. Pre-operative antimicrobial prophylaxis had no significant effect on post-operative infection following ESD-ECN and thus may be unnecessary. Instead, prevention of digestive tract perforation may be more critical for the decrease in post-operative infections.
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Affiliation(s)
- T Muro
- Department of Clinical Pharmacy, Nagasaki University Hospital, Nagasaki, Japan
| | - N Higuchi
- Department of Clinical Pharmacy, Nagasaki University Hospital, Nagasaki, Japan
| | - M Imamura
- Department of Clinical Pharmacy, Nagasaki University Hospital, Nagasaki, Japan
| | - H Nakagawa
- Department of Clinical Pharmacy, Nagasaki University Hospital, Nagasaki, Japan
| | - M Honda
- Department of Medical Information, Nagasaki University Hospital, Nagasaki, Japan
| | - K Nakao
- Department of Gastroenterology and Hepatology, Nagasaki University Hospital, Nagasaki, Japan
| | - K Izumikawa
- Infection Control and Education Center, Nagasaki University Hospital, Nagasaki, Japan
| | - H Sasaki
- Department of Clinical Pharmacy, Nagasaki University Hospital, Nagasaki, Japan
| | - T Kitahara
- Department of Clinical Pharmacy, Nagasaki University Hospital, Nagasaki, Japan
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Shirai T, Imada S, Higashiya A, Sekiyama A, Suga S, Muro T, Tanaka Y, Tamasaku K, Yabashi M, Ishikawa T, Miyasaka S, Tokura Y. Ce electronic states in Nd(0.45-x)Ce(x)Sr0.55MnO3 probed by x-ray absorption spectroscopy and photoemission. J Phys Condens Matter 2013; 25:415601. [PMID: 24047823 DOI: 10.1088/0953-8984/25/41/415601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We have investigated the Ce 4f electronic states in the Ce-doped manganites Nd(0.45-x)Ce(x)Sr0.55MnO3 (NCSMO) by means of x-ray absorption spectroscopy (XAS) and hard x-ray photoelectron spectroscopy (HAXPES). The Ce 3d XAS shows that the Ce ions exist in the form of the Ce(3+) and Ce(4+) mixed-valent states, and we have found that the XAS spectral features change with temperature. The Ce 3d XAS and HAXPES spectra for NCSMO agree reasonably well with calculated results based on the single-impurity Anderson model, which takes into account the atomic multiplets and two valence bands. The estimated Ce bulk valence of Nd0.15Ce0.3Sr0.55MnO3 decreases from 3.44 to 3.30 with cooling.
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Affiliation(s)
- T Shirai
- Department of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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Migita K, Nakamura M, Abiru S, Jiuchi Y, Nagaoka S, Komori A, Hashimoto S, Bekki S, Yamasaki K, Komatsu T, Shimada M, Kouno H, Hijioka T, Kohjima M, Nakamuta M, Kato M, Yoshizawa K, Ohta H, Nakamura Y, Takezaki E, Nishimura H, Sato T, Ario K, Hirashima N, Oohara Y, Naganuma A, Muro T, Sakai H, Mita E, Sugi K, Yamashita H, Makita F, Yatsuhashi H, Ishibashi H, Yasunami M. Association of STAT4 polymorphisms with susceptibility to type-1 autoimmune hepatitis in the Japanese population. PLoS One 2013; 8:e71382. [PMID: 23990947 PMCID: PMC3750035 DOI: 10.1371/journal.pone.0071382] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Accepted: 07/02/2013] [Indexed: 01/31/2023] Open
Abstract
Background/Aims Recent studies demonstrated an association of STAT4 polymorphisms with autoimmune diseases including systemic lupus erythematosus and rheumatoid arthritis, indicating multiple autoimmune diseases share common susceptibility genes. We therefore investigated the influence of STAT4 polymorphisms on the susceptibility and phenotype of type-1 autoimmune hepatitis in a Japanese National Hospital Organization (NHO) AIH multicenter cohort study. Methodology/Principal Findings Genomic DNA from 460 individuals of Japanese origin including 230 patients with type-1 autoimmune hepatitis and 230 healthy controls was analyzed for two single nucleotide polymorphisms in the STAT4 gene (rs7574865, rs7582694). The STAT4 rs7574865T allele conferred risk for type-1 autoimmune hepatitis (OR = 1.61, 95% CI = 1.23–2.11; P = 0.001), and patients without accompanying autoimmune diseases exhibited an association with the rs7574865T allele (OR = 1.50, 95%CI = 1.13–1.99; P = 0.005). Detailed genotype-phenotype analysis of type-1 autoimmune hepatitis patients with (n = 44) or without liver cirrhosis (n = 186) demonstrated that rs7574865 was not associated with the development of liver cirrhosis and phenotype (biochemical data and the presence of auto-antibodies). Conclusions/Significance This is the first study to show a positive association between a STAT4 polymorphism and type-1 autoimmune hepatitis, suggesting that autoimmune hepatitis shares a gene commonly associated with risk for other autoimmune diseases.
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Affiliation(s)
- Kiyoshi Migita
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
- * E-mail:
| | - Minoru Nakamura
- Department of Hepatology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Seigo Abiru
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Yuka Jiuchi
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Shinya Nagaoka
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Atsumasa Komori
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Satoru Hashimoto
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Shigemune Bekki
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Kazumi Yamasaki
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Tatsuji Komatsu
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Masaaki Shimada
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Hiroshi Kouno
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Taizo Hijioka
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Motoyuki Kohjima
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Makoto Nakamuta
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Michio Kato
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Kaname Yoshizawa
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Hajime Ohta
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Yoko Nakamura
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Eiichi Takezaki
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Hideo Nishimura
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Takeaki Sato
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Keisuke Ario
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Noboru Hirashima
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Yukio Oohara
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Atsushi Naganuma
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Toyokichi Muro
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Hironori Sakai
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Eiji Mita
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Kazuhiro Sugi
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | | | - Fujio Makita
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | | | - Hiromi Ishibashi
- NHO-AIH Study Group, Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Michio Yasunami
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
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Nakamura M, Nishida N, Kawashima M, Aiba Y, Tanaka A, Yasunami M, Nakamura H, Komori A, Nakamuta M, Zeniya M, Hashimoto E, Ohira H, Yamamoto K, Onji M, Kaneko S, Honda M, Yamagiwa S, Nakao K, Ichida T, Takikawa H, Seike M, Umemura T, Ueno Y, Sakisaka S, Kikuchi K, Ebinuma H, Yamashiki N, Tamura S, Sugawara Y, Mori A, Yagi S, Shirabe K, Taketomi A, Arai K, Monoe K, Ichikawa T, Taniai M, Miyake Y, Kumagi T, Abe M, Yoshizawa K, Joshita S, Shimoda S, Honda K, Takahashi H, Hirano K, Takeyama Y, Harada K, Migita K, Ito M, Yatsuhashi H, Fukushima N, Ota H, Komatsu T, Saoshiro T, Ishida J, Kouno H, Kouno H, Yagura M, Kobayashi M, Muro T, Masaki N, Hirata K, Watanabe Y, Nakamura Y, Shimada M, Hirashima N, Komeda T, Sugi K, Koga M, Ario K, Takesaki E, Maehara Y, Uemoto S, Kokudo N, Tsubouchi H, Mizokami M, Nakanuma Y, Tokunaga K, Ishibashi H. Genome-wide association study identifies TNFSF15 and POU2AF1 as susceptibility loci for primary biliary cirrhosis in the Japanese population. Am J Hum Genet 2012; 91:721-8. [PMID: 23000144 DOI: 10.1016/j.ajhg.2012.08.010] [Citation(s) in RCA: 167] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2012] [Revised: 06/03/2012] [Accepted: 08/08/2012] [Indexed: 01/12/2023] Open
Abstract
For the identification of susceptibility loci for primary biliary cirrhosis (PBC), a genome-wide association study (GWAS) was performed in 963 Japanese individuals (487 PBC cases and 476 healthy controls) and in a subsequent replication study that included 1,402 other Japanese individuals (787 cases and 615 controls). In addition to the most significant susceptibility region, human leukocyte antigen (HLA), we identified two significant susceptibility loci, TNFSF15 (rs4979462) and POU2AF1 (rs4938534) (combined odds ratio [OR] = 1.56, p = 2.84 × 10(-14) for rs4979462, and combined OR = 1.39, p = 2.38 × 10(-8) for rs4938534). Among 21 non-HLA susceptibility loci for PBC identified in GWASs of individuals of European descent, three loci (IL7R, IKZF3, and CD80) showed significant associations (combined p = 3.66 × 10(-8), 3.66 × 10(-9), and 3.04 × 10(-9), respectively) and STAT4 and NFKB1 loci showed suggestive association with PBC (combined p = 1.11 × 10(-6) and 1.42 × 10(-7), respectively) in the Japanese population. These observations indicated the existence of ethnic differences in genetic susceptibility loci to PBC and the importance of TNF signaling and B cell differentiation for the development of PBC in individuals of European descent and Japanese individuals.
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Honda K, Seike M, Maehara SI, Tahara K, Anai H, Moriuchi A, Muro T. Lamivudine treatment enabling right hepatectomy for hepatocellular carcinoma in decompensated cirrhosis. World J Gastroenterol 2012; 18:2586-90. [PMID: 22654459 PMCID: PMC3360460 DOI: 10.3748/wjg.v18.i20.2586] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2011] [Revised: 02/15/2012] [Accepted: 03/09/2012] [Indexed: 02/06/2023] Open
Abstract
A 69-year-old man was admitted to our hospital in October 2003, for further examination of two liver tumors. He was diagnosed with hepatocellular carcinoma (HCC) arising from decompensated hepatitis B virus (HBV)-related cirrhosis. Long-term lamivudine administration improved liver function dramatically despite repeated treatment for HCC. His Child-Pugh score was 9 points at start of lamivudine treatment, improving to 5 points after 1 year. His indocyanine green at 15 min after injection test score was 48% before lamivudine treatment, improving to 22% after 2 years and to 5% after 4 years. Radiofrequency ablation controlled the HCC foci and maintained his liver function. In April 2009, abdominal computed tomography revealed a tumor thrombus in the right portal vein. Since his indocyanine green test results had improved to less than 10%, we performed a right hepatectomy, which was successful. To our knowledge, there have been no documented reports of patients undergoing successful right hepatectomy for HCC arising from decompensated cirrhosis. The findings observed in our patient indicate the importance of nucleoside analogs for treating HBV-related HCC.
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12
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Tamada Y, Yatsuhashi H, Masaki N, Nakamuta M, Mita E, Komatsu T, Watanabe Y, Muro T, Shimada M, Hijioka T, Satoh T, Mano Y, Komeda T, Takahashi M, Kohno H, Ota H, Hayashi S, Miyakawa Y, Abiru S, Ishibashi H. Hepatitis B virus strains of subgenotype A2 with an identical sequence spreading rapidly from the capital region to all over Japan in patients with acute hepatitis B. Gut 2012; 61:765-73. [PMID: 22068163 DOI: 10.1136/gutjnl-2011-300832] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE To examine recent trends of acute infection with hepatitis B virus (HBV) in Japan by nationwide surveillance and phylogenetic analyses. METHODS During 1991 through 2009, a sentinel surveillance was conducted in 28 national hospitals in a prospective cohort study. Genotypes of HBV were determined in 547 patients with acute hepatitis B. Nucleotide sequences in the preS1/S2/S gene of genotype A and B isolates were determined for phylogenetic analyses. RESULTS HBV genotype A was detected in 137 (25% (accompanied by genotype G in one)) patients, B in 48 (9%), C in 359 (66%), and other genotypes in the remaining three (0.5%). HBV persisted in five with genotype A including the one accompanied by genotype G; another was co-infected with HIV type 1. The genotype was A in 4.8% of patients during 1991-1996, 29.3% during 1997-2002, and 50.0% during 2003-2008 in the capital region, as against 6.5%, 8.5% and 33.1%, respectively, in other regions. Of the 114 genotype A isolates, 13 (11.4%) were subgenotype A1, and 101 (88.6%) were A2, whereas of the 43 genotype B isolates, 10 (23.3%) were subgenotype B1, 28 (65.1%) were B2, two (4.7%) were B3, and three (7.0%) were B4. Sequences of 65 (64%) isolates of A2 were identical, as were three (23%) of A1, and five (18%) of B2, but none of the B1, B3 and B4 isolates shared a sequence. CONCLUSIONS Acute infection with HBV of genotype A, subgenotype A2 in particular, appear to be increasing, mainly through sexual contact, and spreading from the capital region to other regions in Japan nationwide. Infection persisted in 4% of the patients with genotype A, and HBV strains with an identical sequence prevailed in subgenotype A2 infections. This study indicates the need for universal vaccination of young people to prevent increases in HBV infection in Japan.
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Affiliation(s)
- Yoko Tamada
- Clinical Research Center, NHO Nagasaki Medical Center, Nagasaki, Japan
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Migita K, Watanabe Y, Jiuchi Y, Nakamura Y, Saito A, Yagura M, Ohta H, Shimada M, Mita E, Hijioka T, Yamashita H, Takezaki E, Muro T, Sakai H, Nakamuta M, Abiru S, Komori A, Ito M, Yatsuhashi H, Nakamura M, Ishibashi H. Hepatocellular carcinoma and survival in patients with autoimmune hepatitis (Japanese National Hospital Organization-autoimmune hepatitis prospective study). Liver Int 2012; 32:837-44. [PMID: 22221966 DOI: 10.1111/j.1478-3231.2011.02734.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2011] [Accepted: 11/30/2011] [Indexed: 12/12/2022]
Abstract
BACKGROUND/AIMS Although the outcome of autoimmune hepatitis (AIH) is generally good, the natural course and likelihood of progression to cirrhosis or hepatocellular carcinoma (HCC) remain undefined, and may vary by region and population structure. Our aims were to evaluate risk factors that contribute to poor outcome and particularly development of HCC in a prospective multicentric cohort study of AIH. METHODS The study group comprised 193 Japanese patients with AIH who were prospectively followed up at annual intervals between 1995 and 2008. The mean follow-up period was 8.0 ± 4.5 years. RESULTS Twenty-one (10.9%) patients had cirrhosis at presentation and a further 15 (7.8%) developed cirrhosis during the follow-up period. Survival rates were 94.2% at 10 years and 89.3% at 15 years. HCC was diagnosed in seven of the 193 patients. The presence of cirrhosis at presentation was a risk factor for HCC according to a Cox proportional hazard model, and the HCC-free survival rate was significantly lower in those with cirrhosis compared to those without cirrhosis according to Kaplan-Meier analysis. CONCLUSIONS Although the outcome of AIH is as good if not better among Japanese than for other populations, there was an increased risk of HCC in these patients. Cirrhosis at presentation was predictive of development of HCC in AIH in Japan.
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Affiliation(s)
- Kiyoshi Migita
- Clinical Research Center, NHO Nagasaki Medical Center, Omura, Japan.
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Hyodo E, Iwata S, Tugcu A, Oe Y, Koczo A, Shimada K, Muro T, Yoshikawa J, Yoshiyama M, Gillam LD, Hahn RT, Di Tullio MR, Homma S. Accurate measurement of mitral annular area by using single and biplane linear measurements: comparison of conventional methods with the three-dimensional planimetric method. Eur Heart J Cardiovasc Imaging 2011; 13:605-11. [DOI: 10.1093/ejechocard/jer300] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Muro T, Sasaki T, Hosaka N, Umeda Y, Takemoto S, Yamamoto H, Kamimura H, Higuchi S, Karube Y. Population pharmacokinetic analysis of meropenem in Japanese adult patients. J Clin Pharm Ther 2011; 36:230-6. [PMID: 21366653 DOI: 10.1111/j.1365-2710.2010.01171.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
WHAT IS KNOWN AND OBJECTIVE Meropenem is frequently employed as an empirical treatment for serious infections, but there has been no report on its population pharmacokinetic parameters for Japanese patients. Our aim is to undertake a population pharmacokinetic analysis of meropenem using non-linear mixed effects model (NONMEM). METHODS Data from 68 patients were analysed via NONMEM with the first-order method. The participants' covariates, including gender, age, actual body weight, serum creatinine, serum albumin, serum total protein and creatinine clearance, were analyzed by the forward inclusion and backward elimination method to identify their potential influence on meropenem pharmacokinetics. The adequacy of the constructed model was assessed by goodness-of-fit plots and the precision of the parameter estimated at each step of the model development. To assess the robustness of the estimated parameter, bootstrap analysis was performed. RESULTS AND DISCUSSION The data were best described by a one-compartment model. The serum creatinine values modified by the below normal limit in our hospital (mSCR) were an influential covariate for clearance (CL): CL (L/h) = 11·1 × (mSCR/0·7)(-1). The volume of distribution was estimated as 33·6 L. The coefficient of variation of the inter-individual variability of CL and the residual variability were 52·1% and 0·827% μg/mL, respectively. A comparison of the population pharmacokinetic parameters of meropenem in the final model estimated in NONMEM with original data, and 1000 bootstrap samples shows that both sets of estimates were comparable, thereby indicating the robustness of the proposed model. WHAT IS NEW AND CONCLUSION A population pharmacokinetic model that satisfactorily described the disposition and variability of meropenem in our Japanese population is described. NONMEM analysis showed that the clearance of meropenem depended on modified serum creatinine. The results of this study should help Japanese patients on meropenem by improving the prediction accuracy of dosing using the Bayesian method.
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Affiliation(s)
- T Muro
- Department of Pharmacy, Iizuka Hospital, Iizuka, Fukuoka, Japan.
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16
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Kawaguchi T, Kakuma T, Yatsuhashi H, Watanabe H, Saitsu H, Nakao K, Taketomi A, Ohta S, Tabaru A, Takenaka K, Mizuta T, Nagata K, Komorizono Y, Fukuizumi K, Seike M, Matsumoto S, Maeshiro T, Tsubouchi H, Muro T, Inoue O, Akahoshi M, Sata M. Data mining reveals complex interactions of risk factors and clinical feature profiling associated with the staging of non-hepatitis B virus/non-hepatitis C virus-related hepatocellular carcinoma. Hepatol Res 2011; 41:564-71. [PMID: 21501351 DOI: 10.1111/j.1872-034x.2011.00799.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
AIM Non-hepatitis B virus/non-hepatitis C virus-related hepatocellular carcinoma (NBNC-HCC) is often detected at an advanced stage, and the pathology associated with the staging of NBNC-HCC remains unclear. Data mining is a set of statistical techniques which uncovers interactions and meaningful patterns of factors from a large data collection. The aims of this study were to reveal complex interactions of the risk factors and clinical feature profiling associated with the staging of NBNC-HCC using data mining techniques. METHODS A database was created from 663 patients with NBNC-HCC at 20 institutions. The Milan criteria were used as staging of HCC. Complex associations of variables and clinical feature profiling with the Milan criteria were analyzed by graphical modeling and decision tree algorithm methods, respectively. RESULTS Graphical modeling identified six factors independently associated with the Milan criteria: diagnostic year of HCC; diagnosis of liver cirrhosis; serum aspartate aminotransferase (AST); alanine aminotransferase (ALT); α-fetoprotein (AFP); and des-γ-carboxy prothrombin (DCP) levels. The decision trees were created with five variables to classify six groups of patients. Sixty-nine percent of the patients were within the Milan criteria, when patients showed an AFP level of 200 ng/mL or less, diagnosis of liver cirrhosis and an AST level of less than 93 IU/mL. On the other hand, 18% of the patients were within the Milan criteria, when patients showed an AFP level of more than 200 ng/mL and ALT level of 20 IU/mL or more. CONCLUSION Data mining disclosed complex interactions of the risk factors and clinical feature profiling associated with the staging of NBNC-HCC.
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Affiliation(s)
- Takumi Kawaguchi
- Department of Digestive Disease Information and Research and Department of Medicine, Kurume University School of Medicine, Kurume.
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Taura N, Fukushima N, Yastuhashi H, Takami Y, Seike M, Watanabe H, Mizuta T, Sasaki Y, Nagata K, Tabara A, Komorizono Y, Taketomi A, Matsumoto S, Tamai T, Muro T, Nakao K, Fukuizumi K, Maeshiro T, Inoue O, Sata M. The incidence of hepatocellular carcinoma associated with hepatitis C infection decreased in Kyushu area. Med Sci Monit 2011; 17:PH7-11. [PMID: 21278701 PMCID: PMC3524707 DOI: 10.12659/msm.881375] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [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: 01/25/2023] Open
Abstract
Background The incidence of hepatocellular carcinoma (HCC) in Japan has still been increasing. The aim of the present study was to analyze the epidemiological trend of HCC in the western area of Japan, Kyushu. Material/Methods A total of 10,010 patients with HCC diagnosed between 1996 and 2008 in the Liver Cancer study group of Kyushu (LCSK), were recruited for this study. Cohorts of patients with HCC were categorized into five year intervals. The etiology of HCC was categorized to four groups as follows; B: HBsAg positive, HCV-RNA negative, C: HCV-RNA positive, HBsAg negative, B+C: both of HBsAg and HCV-RNA positive, nonBC: both of HBsAg and HCV-RNA negative. Results B was 14.8% (1,485 of 10,010), whereas 68.1% (6,819 of 10,010) had C, and 1.4% (140 of 10,010) had HCC associated with both viruses. The remaining 1,566 patients (15.6%) did not associate with both viruses. Cohorts of patients with HCC were divided into six-year intervals (1996–2001 and 2002–2007). The ratio of C cases decreased from 73.1% in 1996–2001 to 64.9% in 2002–2007. On the other hand, B and -nonBC cases increased significantly from 13.9% and 11.3% in 1996–2001 to 16.2% and 17.6% in 2002–2007, respectively. Conclusions The incidence of hepatocellular carcinoma associated with hepatitis C infection decreased after 2001 in Kyushu area. This change was due to the increase in the number and proportion of the HCC not only nonBC patients but also B patients.
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Affiliation(s)
- Naota Taura
- Clinical Research Center, National Nagasaki Medical Center, Omura City, Nagasaki, Japan
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Guo FZ, Muro T, Matsushita T, Wakita T, Ohashi H, Senba Y, Kinoshita T, Kobayashi K, Saitoh Y, Koshikawa T, Yasue T, Oura M, Takeuchi T, Shin S. Characterization of spectroscopic photoemission and low energy electron microscope using multipolarized soft x rays at BL17SU/SPring-8. Rev Sci Instrum 2007; 78:066107. [PMID: 17614651 DOI: 10.1063/1.2748387] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Spectroscopic photoemission and low energy electron microscope (SPELEEM) improved its performance after installation at BL17SU/SPring-8, where a multipolarization-mode undulator is employed to produce circularly and linearly polarized soft x rays. This undulator enables us to study the domain structures of ferromagnetic and antiferromagnetic materials by x-ray magnetic circular dichroism and x-ray magnetic linear dichroism. SPELEEM is used to study light elements (C, N, and O), 3d transition-metal elements and 4f rare earth elements, utilizing a wide range of photon energies. The two cylindrical mirrors adopted in front of SPELEEM ensure an illumination area of 14 x 14 microm(2) on the samples. The lateral resolution of a secondary electron photoemission electron microscope image is estimated to be better than 85 nm, whereas the energy resolution of the instrument is better than 0.4 eV.
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Affiliation(s)
- F Z Guo
- JASRI/SPring-8, Kouto 1-1-1, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan.
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Yano M, Sekiyama A, Fujiwara H, Saita T, Imada S, Muro T, Onuki Y, Suga S. Three-dimensional bulk fermiology of CeRu2Ge2 in the paramagnetic phase by soft x-ray hnu-dependent (700-860 eV) ARPES. Phys Rev Lett 2007; 98:036405. [PMID: 17358704 DOI: 10.1103/physrevlett.98.036405] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2006] [Indexed: 05/14/2023]
Abstract
By virtue of the soft x-ray angle-resolved photoelectron spectroscopy, the three-dimensional bulk fermiology has been successfully performed for a strongly correlated Ce compound, ferromagnet CeRu2Ge2 in the paramagnetic phase. A clear difference of the Fermi surface topology from either band calculation or de Haas-van Alphen results in the ferromagnetic phase is observed and interpreted by considering the difference of the 4f contribution to the Fermi surfaces in the paramagnetic phase.
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Affiliation(s)
- M Yano
- Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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20
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Nakamura M, Kondo H, Mori T, Komori A, Matsuyama M, Ito M, Takii Y, Koyabu M, Yokoyama T, Migita K, Daikoku M, Abiru S, Yatsuhashi H, Takezaki E, Masaki N, Sugi K, Honda K, Adachi H, Nishi H, Watanabe Y, Nakamura Y, Shimada M, Komatsu T, Saito A, Saoshiro T, Harada H, Sodeyama T, Hayashi S, Masumoto A, Sando T, Yamamoto T, Sakai H, Kobayashi M, Muro T, Koga M, Shums Z, Norman GL, Ishibashi H. Anti-gp210 and anti-centromere antibodies are different risk factors for the progression of primary biliary cirrhosis. Hepatology 2007; 45:118-27. [PMID: 17187436 DOI: 10.1002/hep.21472] [Citation(s) in RCA: 247] [Impact Index Per Article: 14.5] [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: 12/11/2022]
Abstract
UNLABELLED The predictive role of antinuclear antibodies (ANAs) remains elusive in the long-term outcome of primary biliary cirrhosis (PBC). The progression of PBC was evaluated in association with ANAs using stepwise Cox proportional hazard regression and an unconditional stepwise logistic regression model based on the data of 276 biopsy-proven, definite PBC patients who have been registered to the National Hospital Organization Study Group for Liver Disease in Japan (NHOSLJ). When death of hepatic failure/liver transplantation (LT) was defined as an end-point, positive anti-gp210 antibodies (Hazard ratio (HR) = 6.742, 95% confidence interval (CI): 2.408, 18.877), the late stage (Scheuer's stage 3, 4) (HR = 4.285, 95% CI:1.682,10.913) and male sex (HR = 3.266, 95% CI: 1.321,8.075) were significant risk factors at the time of initial liver biopsy. When clinical progression to death of hepatic failure/LT (i.e., hepatic failure type progression) or to the development of esophageal varices or hepatocellular carcinoma without developing jaundice (Total bilirubin < 1.5 mg/dL) (i.e., portal hypertension type progression) was defined as an end-point in the early stage (Scheuer's stage 1, 2) PBC patients, positive anti-gp210 antibodies was a significant risk factor for hepatic failure type progression [odds ratio (OR) = 33.777, 95% CI: 5.930, 636.745], whereas positive anti-centromere antibodies was a significant risk factor for portal hypertension type progression (OR = 4.202, 95% CI: 1.307, 14.763). Histologically, positive anti-gp210 antibodies was most significantly associated with more severe interface hepatitis and lobular inflammation, whereas positive anticentromere antibodies was most significantly associated with more severe ductular reaction. CONCLUSION These results indicate 2 different progression types in PBC, hepatic failure type and portal hypertension type progression, which may be represented by positive-anti-gp210 and positive-anticentromere antibodies, respectively.
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Affiliation(s)
- Minoru Nakamura
- Clinical Research Center, National Hospital Organization (NHO) Nagasaki Medical Center and Department of Hepatology, Nagasaki University Graduate School of Biomedical Sciences, Omura, Nagasaki, Japan.
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Muro T, Nakamura T, Matsushita T, Wakita T, Fukumoto K, Kimura H, Hirono T, Kinoshita T, Hara T, Shirasawa K, Takeuchi M, Kitamura H. Status of the Twin Helical Undulator Soft X-ray Beamline at SPring-8: Performance for Circular Dichroism Measurements. ACTA ACUST UNITED AC 2007. [DOI: 10.1063/1.2436125] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Yokoya T, Nakamura T, Matsushita T, Muro T, Takano Y, Nagao M, Takenouchi T, Kawarada H, Oguchi T. Origin of the metallic properties of heavily boron-doped superconducting diamond. Nature 2005; 438:647-50. [PMID: 16319887 DOI: 10.1038/nature04278] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2005] [Accepted: 09/29/2005] [Indexed: 11/09/2022]
Abstract
The physical properties of lightly doped semiconductors are well described by electronic band-structure calculations and impurity energy levels. Such properties form the basis of present-day semiconductor technology. If the doping concentration n exceeds a critical value n(c), the system passes through an insulator-to-metal transition and exhibits metallic behaviour; this is widely accepted to occur as a consequence of the impurity levels merging to form energy bands. However, the electronic structure of semiconductors doped beyond n(c) have not been explored in detail. Therefore, the recent observation of superconductivity emerging near the insulator-to-metal transition in heavily boron-doped diamond has stimulated a discussion on the fundamental origin of the metallic states responsible for the superconductivity. Two approaches have been adopted for describing this metallic state: the introduction of charge carriers into either the impurity bands or the intrinsic diamond bands. Here we show experimentally that the doping-dependent occupied electronic structures are consistent with the diamond bands, indicating that holes in the diamond bands play an essential part in determining the metallic nature of the heavily boron-doped diamond superconductor. This supports the diamond band approach and related predictions, including the possibility of achieving dopant-induced superconductivity in silicon and germanium. It should also provide a foundation for the possible development of diamond-based devices.
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Affiliation(s)
- T Yokoya
- Japan Synchrotron Radiation Research Institute (JASRI)/SPring-8, 1-1-1 Kouto, Sayo, Hyogo 679-5198, Japan.
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Abe Y, Muro T, Sakanoue Y, Komatsu R, Otsuka M, Naruko T, Itoh A, Yoshiyama M, Haze K, Yoshikawa J. Intravenous myocardial contrast echocardiography predicts regional and global left ventricular remodelling after acute myocardial infarction: comparison with low dose dobutamine stress echocardiography. Heart 2005; 91:1578-83. [PMID: 15797931 PMCID: PMC1769245 DOI: 10.1136/hrt.2004.057521] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [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: 11/03/2022] Open
Abstract
OBJECTIVE To assess the role of intravenous myocardial contrast echocardiography (MCE) in predicting functional recovery and regional or global left ventricular (LV) remodelling after acute myocardial infarction (AMI) compared with low dose dobutamine stress echocardiography (LDSE). METHODS 21 patients with anterior AMI and successful primary angioplasty underwent MCE and LDSE during the subacute stage (2-4 weeks after AMI). Myocardial perfusion and contractile reserve were assessed in each segment (12 segment model) with MCE and LDSE. The 118 dyssynergic segments in the subacute stage were classified as recovered, unchanged, or remodelled according to wall motion at six months' follow up. Percentage increase in LV end diastolic volume (%DeltaEDV) was also calculated. RESULTS The presence of perfusion was less accurate than the presence of contractile reserve in predicting regional recovery (55% v 81%, p < 0.0001). However, the absence of perfusion was more accurate than the absence of contractile reserve in predicting regional remodelling (83% v 48%, p < 0.0001). The number of segments without perfusion was an independent predictor of %DeltaEDV, whereas the number of segments without contractile reserve was not. The area under the receiver operating characteristic curve showed that the number of segments without perfusion predicted substantial LV dilatation (%DeltaEDV > 20%) more accurately than did the number of segments without contractile reserve (0.88 v 0.72). CONCLUSION In successfully revascularised patients with AMI, myocardial perfusion assessed by MCE is predictive of regional and global LV remodelling rather than of functional recovery, whereas contractile reserve assessed by LDSE is predictive of functional recovery rather than of LV remodelling.
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Affiliation(s)
- Y Abe
- Department of Cardiology, Osaka City General Hospital, Osaka, Japan
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Hyodo E, Hozumi T, Takemoto Y, Watanabe H, Muro T, Yamagishi H, Yoshiyama M, Takeuchi K, Yoshikawa J. Early detection of cardiac involvement in patients with sarcoidosis by a non-invasive method with ultrasonic tissue characterisation. Heart 2004; 90:1275-80. [PMID: 15486119 PMCID: PMC1768522 DOI: 10.1136/hrt.2003.027763] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [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: 11/03/2022] Open
Abstract
OBJECTIVES To clarify the value of cycle dependent variation of myocardial integrated backscatter (CV-IB) analysis, which non-invasively measures acoustic properties of the myocardium, for early detection of cardiac involvement in patients with sarcoidosis. METHODS The study population consisted of 22 consecutive patients with biopsy proven sarcoidosis who did not have any abnormal findings on conventional two dimensional echocardiogram. Cardiac sarcoidosis was diagnosed by radionuclide testing including thallium-201 scintigraphy, gallium-67 scintigraphy, and cardiac fluorine-18-deoxyglucose positron emission tomography. The magnitude and delay of the CV-IB were analysed in the basal mid septum and the basal mid posterior wall of the left ventricle of all patients. RESULTS The patients were divided into two groups: 8 patients with cardiac involvement and 14 patients without cardiac involvement. In the basal septum, a major reduction in the magnitude (mean (SD) 1.8 (4.4) v 6.6 (1.3), p = 0.012) and an increase in the time delay (1.3 (0.5) v 1.0 (0.1), p = 0.038) of CV-IB were observed in patients with cardiac sarcoidosis even in the absence of two dimensional echocardiographic abnormalities. The sensitivity for detecting cardiac involvement was such that the magnitude of CV-IB in the basal septum discriminated 75% of patients with cardiac sarcoidosis from those with non-cardiac sarcoidosis, whereas two dimensional echocardiographic parameters did not discriminate between these two groups. CONCLUSIONS The CV-IB is decreased in the basal septum in patients with cardiac sarcoidosis even in the absence of two dimensional echocardiographic abnormalities. Analysis of CV-IB may be a useful method to detect early myocardial involvement in patients with sarcoidosis.
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Affiliation(s)
- E Hyodo
- Department of Internal Medicine and Cardiology, Osaka City University School of Medicine, Osaka, Japan
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Muro T. A Measurement System For Circular Dichroism In Soft X-ray Absorption Using Helicity Switching By Twin Helical Undulators. ACTA ACUST UNITED AC 2004. [DOI: 10.1063/1.1757978] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Mo SK, Denlinger JD, Kim HD, Park JH, Allen JW, Sekiyama A, Yamasaki A, Kadono K, Suga S, Saitoh Y, Muro T, Metcalf P, Keller G, Held K, Eyert V, Anisimov VI, Vollhardt D. Prominent quasiparticle peak in the photoemission spectrum of the metallic phase of V2O3. Phys Rev Lett 2003; 90:186403. [PMID: 12786031 DOI: 10.1103/physrevlett.90.186403] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2002] [Indexed: 05/24/2023]
Abstract
We present the first observation of a prominent quasiparticle peak in the photoemission spectrum of the metallic phase of V2O3 and report new spectral calculations that combine the local-density approximation with the dynamical mean-field theory (using quantum Monte Carlo simulations) to show the development of such a distinct peak with decreasing temperature. The experimental peak width and weight are significantly larger than in the theory.
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Affiliation(s)
- S-K Mo
- Randall Laboratory of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
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Muro T, Hozumi T, Watanabe H, Yamagishi H, Yoshiyama M, Takeuchi K, Yoshikawa J. Assessment of myocardial perfusion abnormalities by intravenous myocardial contrast echocardiography with harmonic power Doppler imaging: comparison with positron emission tomography. Heart 2003; 89:145-9. [PMID: 12527662 PMCID: PMC1767560 DOI: 10.1136/heart.89.2.145] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Intravenous myocardial contrast echocardiography with harmonic power Doppler imaging (HPDI) enables assessment of myocardial perfusion. Its accuracy in comparison with positron emission tomography (PET), which is one of the most reliable clinical gold standards for myocardial perfusion, remains to be determined. OBJECTIVE To assess the ability of HPDI to identify myocardial perfusion abnormalities, using PET as a gold standard. METHODS 23 patients with myocardial infarction underwent HPDI. Images were obtained from the apical two and four chamber views at pulsing intervals of one to eight cardiac cycles with continuous infusion of Levovist (Schering, Germany). PET was done within two weeks of HPDI. The left ventricle was divided into 12 segments and myocardial opacification by HPDI and uptake of NH(3) by PET in each segment was graded as normal, mildly reduced, or severely reduced. RESULTS Of the 276 segments examined, adequate image quality was obtained in 226 (82%) by HPDI; 50 segments were excluded because of inadequate image quality. There were more exclusions in the basal segments than in the mid or apical segments (p < 0.0001). Of the 226 segments analysed, overall concordance between HPDI and PET was 82% (chi = 0.70). In the apex, more segments were overestimated by HPDI than were underestimated (chi(2) = 6.25, p = 0.012). CONCLUSIONS HPDI and PET gave similar results in the assessment of myocardial perfusion abnormalities. However, poor image quality in the basal segments and overestimation of perfusion in the apical segments are current limitations of HPDI.
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Affiliation(s)
- T Muro
- Department of Cardiology and Medicine, Osaka City University Medical School, Osaka, Japan.
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Fukuda S, Muro T, Hozumi T, Watanabe H, Shimada K, Yoshiyama M, Takeuchi K, Yoshikawa J. Changes in transmural distribution of myocardial perfusion assessed by quantitative intravenous myocardial contrast echocardiography in humans. Heart 2002; 88:368-72. [PMID: 12231594 PMCID: PMC1767389 DOI: 10.1136/heart.88.4.368] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVE To clarify whether changes in transmural distribution of myocardial perfusion under significant coronary artery stenosis can be assessed by quantitative intravenous myocardial contrast echocardiography (MCE) in humans. METHODS 31 patients underwent dipyridamole stress MCE and quantitative coronary angiography. Intravenous MCE was performed by continuous infusion of Levovist. Images were obtained from the apical four chamber view with alternating pulsing intervals both at rest and after dipyridamole infusion. Images were analysed offline by placing regions of interest over both endocardial and epicardial sides of the mid-septum. The background subtracted intensity versus pulsing interval plots were fitted to an exponential function, y = A (1 - e(-betat)), where A is plateau level and beta is rate of rise. RESULTS Of the 31 patients, 16 had significant stenosis (> 70%) in the left anterior descending artery (group A) and 15 did not (group B). At rest, there were no differences in the A endocardial to epicardial ratio (A-EER) and beta-EER between the two groups (mean (SD) 1.2 (0.6) v 1.2 (0.8) and 1.2 (0.7) v 1.1 (0.6), respectively, NS). During hyperaemia, beta-EER in group A was significantly lower than that in group B (1.0 (0.5) v 1.4 (0.5), p < 0.05) and A-EER did not differ between the two groups (1.0 (0.5) v 1.2 (0.4), NS). CONCLUSIONS Changes in transmural distribution of myocardial perfusion under significant coronary artery stenosis can be assessed by quantitative intravenous MCE in humans.
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Affiliation(s)
- S Fukuda
- Department of Internal Medicine and Cardiology, Osaka City University School of Medicine, Osaka, Japan
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Sato H, Hiraoka K, Taniguchi M, Takeda Y, Arita M, Shimada K, Namatame H, Kimura A, Kojima K, Muro T, Saitoh Y, Sekiyama A, Suga S. Electronic structure of YbXCu(4) (X = In, Cd, Mg) investigated by high-resolution photoemission spectroscopy. J Synchrotron Radiat 2002; 9:229-232. [PMID: 12091731 DOI: 10.1107/s0909049502009226] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2002] [Accepted: 05/21/2002] [Indexed: 05/23/2023]
Abstract
The valence-band electronic structure of YbXCu(4) (X = In, Cd, Mg) has been investigated by means of temperature-dependent high-energy-resolution photoemission spectroscopy using a He I resonance line (hnu = 21.22 eV) and synchrotron radiation (hnu = 800 eV). Intensities of the structure due to the Yb(2+) 4f(7/2) states in the He I spectra of YbInCu(4) and YbCdCu(4) gradually increase with decreasing temperature from 300 to 10 K, and Yb(2+) 4f(7/2) structures are clearly observed as peaks near the Fermi level (E(F)) at 10 K. The enhancement of the Yb(2+) 4f(7/2) peak from 50 to 10 K is much greater for YbInCu(4) than for YbCdCu(4). On the other hand, the Yb(2+) 4f(7/2) states of YbMgCu(4) are observed as a broad structure near E(F). In the synchrotron radiation photoemission spectra of YbInCu(4) and YbCdCu(4), the structures due to the Yb(2+) and Yb(3+) 4f states are recognized at all temperatures. The intensity ratio Yb(2+)/Yb(3+) gradually increases with decreasing temperature. The energy separations between the Yb(2+) and Yb(3+) 4f structures of YbInCu(4) increase from 50 to 20 K. For YbMgCu(4), on the other hand, almost only the Yb(2+) structures are observed and little temperature dependence has been detected.
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Affiliation(s)
- H Sato
- Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan
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Hirata K, Shimada K, Watanabe H, Muro T, Yoshiyama M, Takeuchi K, Hozumi T, Yoshikawa J. Modulation of coronary flow velocity reserve by gender, menstrual cycle and hormone replacement therapy. J Am Coll Cardiol 2001; 38:1879-84. [PMID: 11738288 DOI: 10.1016/s0735-1097(01)01658-8] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.1] [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: 10/18/2022]
Abstract
OBJECTIVES The purpose of this study was twofold: 1) to examine the relationship between menstrual cycle and coronary flow velocity reserve (CFVR) in young healthy women, and 2) to evaluate the effect of hormone replacement therapy by estrogen on CFVR in postmenopausal women, using transthoracic color Doppler echocardiography (TTCDE). BACKGROUND Although the incidence of cardiovascular disease is lower in women before menopause compared with men, postmenopausal women have an incidence of coronary artery disease similar to that of men of the same age. This is mainly dependent upon estrogen deficiency. However, no clinical report has yet examined the effect of estrogen on CFVR, which is one index of coronary microcirculation. METHODS We examined 15 male and both 15 premenopausal and 10 postmenopausal female healthy volunteers. We measured coronary flow velocity of the left anterior descending coronary artery at baseline and hyperemic conditions during adenosine triphosphate infusion by TTCDE and determined CFVR. Each premenopausal woman was studied two times (menstrual [M] and follicular [F] phases) in one menstrual cycle. Fifteen men were also studied at a time corresponding to women's menstrual cycle. The postmenopausal women were studied before and two hours after oral administration of conjugated estrogen (CE). RESULTS Serum 17beta-estradiol level in premenopausal women increased in the F phase and decreased to the same levels as in men, as in the M phase and as in postmenopausal women (123 +/- 9 pg/ml vs. 28 +/- 6 pg/ml, 25 +/- 9 pg/ml and 19 +/- 11 pg/ml; p < 0.0001, respectively). The CFVR increased in the F phase compared with that in the M phase (4.8 +/- 0.4 vs. 3.7 +/- 0.8, p < 0.0001). We found that CFVR in men remained unchanged (3.7 +/- 0.6 vs. 3.8 +/- 0.5). After CE administration, CFVR increased compared with baseline in postmenopausal women (4.1 +/- 0.8 vs. 3.4 +/- 0.8, p < 0.005). CONCLUSIONS In premenopausal women, CFVR determined by TTCDE varied during the menstrual cycle, and in postmenopausal women, CFVR increased after acute estrogen replacement.
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Affiliation(s)
- K Hirata
- Department of Internal Medicine and Cardiology, Graduate School of Medicine, Osaka City University Medical School, Osaka, Japan
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Ito S, Usui H, Maruyama K, Muro T. Roentgenographic evaluation of ossification and calcification of the lumbar spinal canal after intradiscal betamethasone injection. J Spinal Disord 2001; 14:434-8. [PMID: 11586144 DOI: 10.1097/00002517-200110000-00010] [Citation(s) in RCA: 10] [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] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
There have been reports of lumbar spinal canal ossification and calcification after triamcinolone intradiscal injection therapy. Our objective was to observe the roentgenographic changes after betamethasone intradiscal injection therapy for lumbar disc diseases. The subjects were 183 patients (498 discs; 130 men and 53 women) who underwent discography and betamethasone intradiscal injection therapy and were followed for a mean of 5 years and 7 months. Ossification and calcification appeared de novo (three patients, three discs) or enlarged (four patients, five discs) in the outer layer of the posterior annulus fibrosus or posterior longitudinal ligament in eight discs among seven patients (3.8%). The incidence and degree of ossification and calcification in our patients were significantly lower than those reported in previous studies, and a long time elapsed before ossification and calcification appeared or enlarged. Intradiscal injection of betamethasone did not appear to confer any incremental relative risk for lumbar spinal canal ossification and calcification based on review of follow-up roentgenographs.
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Affiliation(s)
- S Ito
- Department of Orthopedic Surgery, Tohkai Spine Center, Gifu Prefectural Tajimi Hospital, Gifu, Japan
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32
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Otsuka R, Watanabe H, Hirata K, Tokai K, Muro T, Yoshiyama M, Takeuchi K, Yoshikawa J. Acute effects of passive smoking on the coronary circulation in healthy young adults. JAMA 2001; 286:436-41. [PMID: 11466122 DOI: 10.1001/jama.286.4.436] [Citation(s) in RCA: 236] [Impact Index Per Article: 10.3] [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: 11/14/2022]
Abstract
CONTEXT Recent studies have shown that passive smoking is a risk factor for ischemic heart disease and may be associated with vascular endothelial dysfunction. The acute effects of passive smoking on coronary circulation in nonsmokers are not known. OBJECTIVE To determine the acute effects of passive smoking on coronary circulation using coronary flow velocity reserve (CFVR), assessed by noninvasive transthoracic Doppler echocardiography. DESIGN, SETTING, AND PARTICIPANTS Cross-sectional study conducted from September 2000 to November 2000 among 30 Japanese men (mean age, 27 years; 15 healthy nonsmokers and 15 asymptomatic active smokers) without history of hypertension, diabetes mellitus, or hyperlipidemia. MAIN OUTCOME MEASURES Coronary flow velocity reserve, calculated as the ratio of hyperemic to basal coronary flow velocity induced by intravenous infusion of adenosine triphosphate and measured in each participant before and after a 30-minute exposure to environmental tobacco smoke. RESULTS Heart rate and blood pressure responses to adenosine triphosphate infusion were not affected by passive smoking exposure in either group. Passive smoking exposure had no effect on basal coronary flow velocity in either group. Mean (SD) CFVR in nonsmokers was significantly higher than that in active smokers before passive smoking exposure (4.4 [0.91] vs 3.6 [0.88], respectively; P =.02), while CFVR after passive smoking exposure did not differ between groups (P =.83). Passive smoking exposure significantly reduced mean (SD) CFVR in nonsmokers (4.4 [0.91] vs 3.4 [0.73], respectively; P<.001). CONCLUSIONS Passive smoking substantially reduced CFVR in healthy nonsmokers. This finding provides direct evidence that passive smoking may cause endothelial dysfunction of the coronary circulation in nonsmokers.
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Affiliation(s)
- R Otsuka
- Department of Internal Medicine and Cardiology, Osaka City University Medical School, 1-4-3 Asahimachi Abeno-ku, Osaka City, Japan 545-8585
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Takuma S, Ota T, Muro T, Hozumi T, Sciacca R, Di Tullio MR, Blood DK, Yoshikawa J, Homma S. Assessment of left ventricular function by real-time 3-dimensional echocardiography compared with conventional noninvasive methods. J Am Soc Echocardiogr 2001; 14:275-84. [PMID: 11287890 DOI: 10.1067/mje.2001.111158] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [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: 11/22/2022]
Abstract
Quantitative assessment of left ventricular ejection fraction is an essential component of cardiac evaluation. We performed real-time 3-dimensional echocardiography in 56 consecutive patients who underwent multigated radionuclide angiography. Thirteen patients were excluded for the following reasons: 5 for large size of left ventricle required for image acquisition, 5 for suboptimal image quality in real-time 3-dimensional echocardiography, and 3 for atrial fibrillation. Finally, we compared left ventricular ejection fraction assessed by real-time 3-dimensional echocardiography and conventional 2-dimensional echocardiography with that obtained by multigated radionuclide angiography in 43 patients. Left ventricular ejection fraction was determined by real-time 3-dimensional echocardiography with the use of parallel plane-disks and sector plane-disks summation methods. A good correlation was obtained between both real-time 3-dimensional echocardiography methods and multigated radionuclide angiography (r = 0.87 and 0.90, standard error of estimate = 3.7% and 4.2%), whereas the relation between the 2-dimensional echocardiography method and radionuclide angiography demonstrated a significant departure from the line of identity (P <.001). In addition, interobserver variability was significantly lower (P <.05) for the real-time 3-dimensional echocardiography methods than that by the 2-dimensional echocardiography method. Real-time 3-dimensional echocardiography may be used for quantification of left ventricular function as an alternative to conventional methods in patients with adequate image quality.
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Affiliation(s)
- S Takuma
- Division of Cardiology, Department of Medicine, Columbia University, New York, NY, USA
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34
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Daimon M, Watanabe H, Yamagishi H, Muro T, Akioka K, Hirata K, Takeuchi K, Yoshikawa J. Physiologic assessment of coronary artery stenosis by coronary flow reserve measurements with transthoracic Doppler echocardiography: comparison with exercise thallium-201 single piston emission computed tomography. J Am Coll Cardiol 2001; 37:1310-5. [PMID: 11300440 DOI: 10.1016/s0735-1097(01)01167-6] [Citation(s) in RCA: 90] [Impact Index Per Article: 3.9] [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: 02/06/2023]
Abstract
OBJECTIVES We evaluated the value of coronary flow reserve (CFR), as determined by transthoracic Doppler echocardiography (TTDE), for physiologic assessment of coronary artery stenosis severity, and we compared TTDE measurements with those obtained by exercise thallium-201 (Tl-201) single-photon emission computed tomography (SPECT). BACKGROUND Coronary flow reserve measurements by TTDE have been reported to be useful for assessing angiographic left anterior descending coronary artery (LAD) stenosis. However, discrepancies exist between angiographic and physiologic estimates of coronary lesion severity. METHODS We studied 36 patients suspected of having coronary artery disease. The flow velocity in the distal LAD was measured by TTDE both at rest and during intravenous infusion of adenosine. Coronary flow reserve was calculated as the ratio of hyperemic to basal peak (peak CFR) and mean (mean CFR) diastolic flow velocities. The CFR measurements by TTDE were compared with the results of Tl-201-SPECT. RESULTS Complete TTDE data were acquired for 33 of 36 study patients. Of these 33 patients, Tl-201-SPECT confirmed reversible perfusion defects in the LAD territories in 12 patients (group A). Twenty-one patients had normal perfusion in the LAD territories (group B). Peak CFR and mean CFR (mean value +/- SD) were 1.5 +/- 0.6 and 1.5 +/- 0.7 in group A and 2.8 +/- 0.8 and 2.7 +/- 0.7 in group B, respectively. Both peak and mean CFR < or = 2.0 predicted reversible perfusion defects, with a sensitivity and specificity of 92% and 90%, respectively. CONCLUSIONS Noninvasive measurement of CFR by TTDE provides data equivalent to those obtained by Tl-201-SPECT for physiologic estimation of the severity of LAD stenosis.
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Affiliation(s)
- M Daimon
- Department of Internal Medicine and Cardiology, Graduate School of Medicine, Osaka City University, Osaka, Japan
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35
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Tani T, Teragaki M, Watanabe H, Muro T, Yamagishi H, Akioka K, Takeuchi K, Yoshikawa J. Prediction of functional recovery in patients with myocardial infarction after revascularization--comparison of low-dose dobutamine stress echocardiography with fluorine-18 fluorodeoxyglucose positron emission tomography. Jpn Circ J 2001; 65:177-81. [PMID: 11266191 DOI: 10.1253/jcj.65.177] [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] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The present study investigated the agreement between low-dose dobutamine stress echocardiography (LDDSE) and fluorine-18 fluorodeoxyglucose positron emission tomography (FDG-PET) and compared each technique's ability to detect myocardial viability and predict functional recovery in 30 patients. All patients underwent revascularization, followed by echocardiography 5+/-3 months. Of the 390 segments analyzed by echocardiography before revascularization, 110 (28%) had abnormal wall motion. LDDSE showed viability in 66 sites of the 110 dyssynergic segments and 58 of these viable segments recovered their wall motion. With FDG-PET, 78 of the 110 dyssynergic segments were diagnosed as viable and 62 of these showed improvement of the wall motion. The sensitivities for LDDSE and FDG-PET to assess functional recovery were 84% and 90%, respectively; specificities were 80% and 64%, respectively. Positive predictive values for LDDSE and FDG-PET were 88% and 79%; negative predictive values were 75% and 78%, respectively. Both methods had good sensitivity for detecting improvement in regional function after revascularization, but LDDSE had a higher specificity for detecting viability and a better positive predictive value for left ventricular functional recovery.
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Affiliation(s)
- T Tani
- First Department of Internal Medicine, Osaka City University Medical School, Osaka, Japan
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Saitoh Y, Muro T, Kotsugi M, Iwasaki T, Sekiyama A, Imada S, Suga S. High-resolution soft X-ray absorption spectroscopy of solids. J Synchrotron Radiat 2001; 8:339-341. [PMID: 11512773 DOI: 10.1107/s0909049500015016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2000] [Accepted: 10/23/2000] [Indexed: 05/23/2023]
Abstract
The present research deals with the high-resolution soft x-ray absorption spectra (XAS) of Si, Ce- and Sm- compounds measured at BL25SU of SPring-8. The spectra are compared with theoretical results. The Si 1s spectrum shows good agreement with the calculated empty density of states so far reported. The Ce 3d spectra are very sensitive to the local electronic structure. The Sm 3d XAS of SmS shows clear temperature dependence, which is partly explained by a calculation for Sm2+ ion.
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Affiliation(s)
- Y Saitoh
- Synchrotron Radiation Research Center, Japan Atomic Energy Research Institute, Sayo, Hyogo
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37
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Muro T, Ota T, Watanabe H, Teragaki M, Takeuchi K, Yoshikawa J. Prediction of contractile reserve by cyclic variation of integrated backscatter of the myocardium in patients with chronic left ventricular dysfunction. Heart 2001; 85:165-70. [PMID: 11156666 PMCID: PMC1729606 DOI: 10.1136/heart.85.2.165] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [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: 01/08/2023] Open
Abstract
OBJECTIVE To clarify whether assessment of the acoustic properties of the myocardium at rest can predict contractile reserve in patients with chronic left ventricular dysfunction. METHODS 23 patients (mean (SD) age 63 (12) years) with chronic left ventricular dysfunction were studied. The magnitude of cardiac cycle dependent variation of integrated backscatter (CVIB) of the myocardium was measured at rest in the basal and mid segment of the septum and posterior wall of the left ventricle, using a real time two dimensional integrated backscatter imaging system. The results were compared with the percentage wall thickening and the wall motion at rest and during low dose dobutamine infusion. The wall motion was graded as normal, hypokinetic, or akinetic and contractile reserve was considered present when an akinetic or hypokinetic segment improved during dobutamine infusion. RESULTS The CVIB at rest correlated with per cent wall thickening at rest and during dobutamine infusion (at rest, r = 0.61, p < 0.0001, during dobutamine, r = 0.76, p < 0.0001). Of the 76 segments examined, 27 showed contractile reserve. The mean CVIB at rest was significantly greater in segments with contractile reserve than in those without (p < 0.0001). CVIB above 3 dB at rest predicted segments with contractile reserve with a sensitivity and specificity of 81% and 60%, respectively (p < 0.0001). CONCLUSIONS CVIB reflected not only myocardial contractility but also the functional capacity of the myocardium. It predicted segmental contractile reserve in patients with chronic left ventricular dysfunction.
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Affiliation(s)
- T Muro
- First Department of Internal Medicine, Osaka City University Medical School, 1-4-3 Asahi-machi Abeno-ku, Osaka 545-8585, Japan.
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Ujino K, Teragaki M, Ota T, Muro T, Watanabe H, Yoshiyama M, Takeuchi K, Yoshikawa J. Novel method for assessing myocardial perfusion: visualization and measurement of intramyocardial coronary blood flow in the entire left ventricular wall using contrast enhanced, high frequency Doppler echocardiography. Jpn Heart J 2001; 42:101-13. [PMID: 11324799 DOI: 10.1536/jhj.42.101] [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] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Using a high frequency ultrasonic transducer, intramyocardial coronary blood flow (IM-CBF) can be visualized and evaluated during hemodynamic changes in the anterior wall and septum of the left ventricle (LV). We tested the hypothesis that detection and quantitative measurement of IM-CBF of entire LV segments are feasible using a high frequency ultrasonic transducer in conjunction with intravenous contrast injection in vivo. A 3 - 8 MHz transducer was used to image and measure IM-CBF in 10 anesthetized dogs. We obtained a color Doppler image of IM-CBF in the LV short-axis view after intravenous Levovist injection (25 mg/ml). The IM-CBF velocity was recorded using spectral Doppler in the antero-septal and infero-posterior wall of closed chest dogs and in the entire LV after opening the chest. A significant increase in IM-CBF velocity was observed in all LV regions after adenosine 5'- triphosphate (ATP) administration. After Levovist(TM) injection, the visualization of IM-CBF was improved and the spectral Doppler pattern of coronary flow velocity was clarified compared to baseline. IM-CBF was assessed in the antero-septal region of the LV before and after left anterior descending coronary artery occlusion. A high frequency ultrasonic transducer in conjunction with intravenous contrast injection improved IM-CBF visualization, enabling quantitative evaluation of the intramyocardial coronary circulation in the entire LV after coronary occlusion and hyperemia. This study may represent a step towards noninvasive assessment of myocardial perfusion before and after coronary reperfusion.
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Affiliation(s)
- K Ujino
- First Department of Internal Medicine, Osaka City University Medical School, Japan
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39
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Takenobu T, Muro T, Iwasa Y, Mitani T. Antiferromagnetism and phase diagram in ammoniated alkali fulleride salts. Phys Rev Lett 2000; 85:381-384. [PMID: 10991288 DOI: 10.1103/physrevlett.85.381] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/1999] [Revised: 03/15/2000] [Indexed: 05/23/2023]
Abstract
Intercalation of neutral ammonia molecules into trivalent face-centered-cubic (fcc) fulleride superconductors induces a dramatic change in electronic states. Monoammoniated alkali fulleride salts (NH3)K3-xRbxC60, forming an isostructural orthorhombic series, undergo an antiferromagnetic transition, which was found by the electron spin resonance experiment. The Neel temperature first increases with the interfullerene spacing and then decreases for (NH3)Rb3C60, forming a maximum at 76 K. This feature is explained by the generalized phase diagram of Mott-Hubbard transition with an antiferromagnetic ground state.
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Affiliation(s)
- T Takenobu
- Japan Advanced Institute of Science and Technology, Tatsunokuchi, Ishikawa 923-1292, Japan
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Abstract
In 64 surgically treated herniated lumbar intervertebral discs, we performed histopathological studies of neovascularization in the outermost layer of the herniated mass in various types of hernia. We obtained specimens separately from the capsule tissue covering the herniated mass and the inner tip tissue of the herniated mass for comparison. Histologically, in most cases, the capsule tissue was the outermost layer of the annulus fibrosus or posterior longitudinal ligament, and the inner tip tissue was the nucleus pulposus. In the capsule tissue, newly formed small blood vessels were present in 73.4% of the total cases examined, regardless of the hernia type. However, the frequency and degree of such vessels in the tip tissue were significantly higher in hernias that perforated the posterior longitudinal ligament than in those that did not. When the intervertebral disc herniates, new blood vessels proliferate in the capsule of the hernial tissue. At the stage when the hernial capsule tissue is still present, these vessels were observed to have difficulty reaching the inner tip portion. These findings suggest that when the nucleus pulposus portion of the herniated mass perforates the posterior longitudinal ligament, it may be subject to a stronger neovascularization reaction.
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Affiliation(s)
- S Ozaki
- Department of Orthopaedic Surgery, Gifu Prefectural Tajimi Hospital, Maehata-Cho, Tajimi, Japan
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41
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Affiliation(s)
- S Ozaki
- Department of Orthopedic Surgery, Gifu Prefectural Tajimi Hospital, Tajimi, Japan
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Teragaki M, Takeuchi K, Toda I, Muro T, Watanabe H, Tani T, Akioka K, Yoshikawa J. Potential applications of intracardiac echocardiography in the assessment of the aortic valve from the right ventricular outflow tract. J Am Soc Echocardiogr 1999; 12:225-30. [PMID: 10196498 DOI: 10.1016/s0894-7317(99)70035-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 10/25/2022]
Abstract
Intracardiac echocardiography (ICE) is a developing technology and a promising method for visualizing intracardiac structures. However, its applications are currently limited to guidance during mitral valvuloplasty, catheter ablation, or electrophysiologic examination. The goal of this study was to observe the aortic valve, measure the annular diameter of the valve by ICE through a right-sided approach, and compare the results by ICE with those by transthoracic echocardiography (TTE) or transesophageal echocardiography (TEE). We studied 18 patients (9 men, 9 women, aged 19 to 72 years) with various heart diseases, including 15 patients with mitral or aortic valvular disease. An imaging catheter was advanced through a long sheath into the outflow tract of the right ventricle. We obtained good longitudinal views of the aortic valve in all patients. Two of the 18 patients had poor image quality by TTE. The annular diameter by ICE correlated more closely with TEE than with TTE. In conclusion, right-sided ICE is a safe, simple, and useful procedure for observing the aortic valve during cardiac catheterization without additional discomfort in the patients. Right-sided ICE is superior to TTE in observing the aortic valve and measuring the annular diameter of the valve. The annular diameter can be measured by ICE as precisely as by TEE.
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Affiliation(s)
- M Teragaki
- First Department of Internal Medicine, Osaka City University Medical School, Osaka, Japan.
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Uchida E, Watanabe H, Ota T, Muro T, Teragaki M, Suehiro S, Takeuchi K, Yoshikawa J. Assessment of transmural coronary blood flow with intraoperative transesophageal color Doppler echocardiography during coronary revascularization. J Am Soc Echocardiogr 1999; 12:241-51. [PMID: 10196501 DOI: 10.1016/s0894-7317(99)70038-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [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: 11/17/2022]
Abstract
Intraoperative color Doppler transesophageal echocardiography with a 4- to 7-MHz transducer was performed on 28 consecutive patients who underwent coronary artery bypass grafting to image and evaluate the transmural coronary blood flow before and after cardiopulmonary bypass. The transmural coronary flow was visualized in 26 (92.8%) of 28 patients in the inferior wall and in 13 (46.4%) of 28 patients in the lateral wall. The peak diastolic flow velocity of the transmural coronary artery in the inferior and lateral wall was significantly increased after coronary revascularization in patients with a successful bypass graft to the right coronary artery (from 34.0 +/- 19.7 to 64.9 +/- 30.9 cm/s, P <.001, n = 10) and to the left circumflex coronary artery (from 35.1 +/- 18.6 to 62.1 +/- 21.1 cm/s, P <.001, n = 10). No significant changes were observed in patients with no bypass graft to the right or left circumflex coronary artery. Coronary blood flow can be mapped and the velocity measured with Doppler transesophageal echocardiography with a high-frequency (4- to 7-MHz) transducer. Assessment of the transmural coronary flow may provide valuable information and aid in decision making during surgical revascularization.
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Affiliation(s)
- E Uchida
- First Department of Internal Medicine and Division of Cardiovascular Surgery, Osaka City University Medical School, Osaka, Japan
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Ito S, Muro T, Urasaki T, Ozaki S. Reevaluation of discograms not classified into usual classifications. J Spinal Disord 1999; 12:151-6. [PMID: 10229531] [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] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
Discograms of images that were eccentrically dyed because of insufficient infiltration of contrast medium are difficult to classify into the usual past discogram patterns. In this study, these types of images were detected in 40 discs of 36 patients with lumbar disc disease. We classified these images into the following three types, and analyzed the dye mechanisms in each case by computed tomography discographic findings: (1) type A (image of the annulus fibrosus only). Nine discs in nine cases. A part of the marginal annulus fibrosus was dyed. (2) type B (image of the right or left half of the nucleus pulposus). Eighteen discs in 15 cases. Unilateral dyeing was considered nucleus pulposus existing in the central region of the disc. (3) type C (partial image of the superior or inferior half of the nucleus pulposus). Thirteen discs in 12 cases. Only the superior or inferior half showing a cotton-ball pattern was dyed.
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Affiliation(s)
- S Ito
- Department of Orthopaedic Surgery, Gifu Prefectural Tajimi Hospital, Tajimi-city, Japan
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Urasaki T, Muro T, Ito S, Hattori Y, Ozaki S. Consistency of lumbar discograms of the same disc obtained twice at a 2-week interval: influence of needle tip position. J Orthop Sci 1998; 3:243-51. [PMID: 9732558 DOI: 10.1007/s007760050049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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: 02/08/2023]
Abstract
: Although numerous papers have emphasized the importance of accurate needle positioning in lumbar discography, no concrete evidence is available to support this contention, and no study has evaluated the image consistency of discography as influenced by this factor. By observing the consistency of two images in relation to needle tip position we aimed to clarify the importance of needle positioning in discography. One hundred and ninety-two patients (324 discs) receiving steroid intradiscal therapy in whom discography of the same disc was performed twice at a 2-week interval and in whom the needle tip position was within the acceptable range (as defined by us) were studied. The patients were divided into two groups: in group G, in whom the needle tip was within a limited range on both discograms, and group P, in whom the needle tip was in this range on only one discogram. Image consistency was compared roentgenographically in the two groups. The consistent image rate for the total number of discs was 48.5%, being significantly higher in group G (53.2%) than in group P (39.0%). The rates were lower in the nucleus pulposus and the posterior portion of the disc than in the other disc areas, but were significantly higher in group G (85. 4% and 75.0%, respectively, for these two areas). The necessity for accurate needle tip positioning was proved roentgenographically.
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Affiliation(s)
- T Urasaki
- Department of Orthopaedic Surgery, Gifu Prefectural Tajimi Hospital, 5-161 Maehata-cho, Tajimi, Gifu 507-8522, Japan
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Saitoh Y, Nakatani T, Matsushita T, Miyahara T, Fujisawa M, Soda K, Muro T, Ueda S, Harada H, Sekiyama A, Imada S, Daimon H, Suga S. Twin helical undulator beamline for soft X-ray spectroscopy at SPring-8. J Synchrotron Radiat 1998; 5:542-544. [PMID: 15263572 DOI: 10.1107/s090904959701902x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/1997] [Accepted: 12/08/1997] [Indexed: 05/24/2023]
Abstract
A very high resolution soft X-ray beamline, BL25SU, has been designed and is under construction at SPring-8. Completely right or left circularly polarized light is supplied on a common axis of a newly designed twin helical undulator. A helicity modulation up to 10 Hz can be performed using five kicker magnets. The fundamental radiation covers the region 0.5-3 keV. Higher-order radiation is rather weak on the axis. A monochromator with varied-line-spacing plane gratings is installed to cover the region below 1.5 keV. A very high resolution beyond 10(4) is expected for the whole energy region.
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Affiliation(s)
- Y Saitoh
- JAERI-RIKEN SPring-8 Project Team, Kamigori, Ako-gun, Hyogo 678-12, Japan
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Teragaki M, Takeuchi K, Toda I, Muro T, Watanabe H, Tani T, Akioka K, Yoshikawa J. New approach for observation of aortic valve through right-sided catheterization using intracardiac echocardiography. J Am Coll Cardiol 1998. [DOI: 10.1016/s0735-1097(98)80735-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Watanabe Y, Muro T, Sugihara A, Shimada Y, Nagao T, Takenishi S, Tominaga Y. A unique enzyme from Saccharothrix sp. catalyzing D-amino acid transfer. Biochim Biophys Acta 1997; 1337:40-6. [PMID: 9003435 DOI: 10.1016/s0167-4838(96)00147-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A newly isolated actinomycete belonging to Saccharothrix sp. was found to produce a unique enzyme catalyzing D-amino acid transfer. The enzyme, which was tentatively named D-amino acid transferase, was purified 2600-fold to electrophoretic homogeneity and the molecular mass was 41 kDa. The enzyme was D-configuration specific and recognized aromatic D-amino acid esters to form oligo D-amino acid esters. D-Phenylalanine ester was favored as substrate over other D-amino acid esters. The optimum conditions for oligo D-phenylalanine ester formation by D-amino acid transferase were pH 7.0 and 40 degrees C. The enzyme was inhibited by DAN, EPNP and DFP.
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Affiliation(s)
- Y Watanabe
- Osaka Municipal Technical Research Institute, Japan
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Susaki T, Sekiyama A, Kobayashi K, Mizokawa T, Fujimori A, Tsunekawa M, Muro T, Matsushita T, Suga S, Ishii H, Hanyu T, Kimura A, Namatame H, Taniguchi M, Miyahara T, Iga F, Kasaya M, Harima H. Low-Energy Electronic Structure of the Kondo Insulator YbB12. Phys Rev Lett 1996; 77:4269-4272. [PMID: 10062491 DOI: 10.1103/physrevlett.77.4269] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Watanabe K, Nishikimi J, Muro T. Irreducible fracture of the neck of the fifth metacarpal. J Hand Surg Br 1996; 21:511-3. [PMID: 8856545 DOI: 10.1016/s0266-7681(96)80057-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
We report a rare case of fracture of the neck of the fifth metacarpal which required open reduction. The radial and ulnar collateral ligaments entrapped the displaced metacarpal head. This patho-anatomy resembles that of rotational supracondylar fractures of the proximal phalanx.
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Affiliation(s)
- K Watanabe
- Department of Orthopaedic Surgery, Gifu Prefectural Tajimi Hospital, Japan
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