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Ogawa K, Ohno Y, Tagashira A, Urata K, Satoh K, Fujimoto N, Sonoda H, Ikeda M, Matsuzaki T, Nishiyama K, Kunitake H, Goto YO, Yamasaki M. Blueberry Stem Extract Prevents Lacrimal Hyposecretion in Non-obese Diabetic Mice via Activation of AMPK. In Vivo 2023; 37:1003-1015. [PMID: 37103112 DOI: 10.21873/invivo.13174] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 03/23/2023] [Accepted: 03/27/2023] [Indexed: 04/28/2023]
Abstract
BACKGROUND/AIM Tears secreted from the lacrimal gland are essential for preserving the ocular surface. Thus, dysfunction of the lacrimal gland in Sjögren's syndrome (SS) can lead to dry eye, resulting in a reduced quality of life. We previously reported that blueberry 'leaf' water extract prevents lacrimal hyposecretion in male non-obese diabetic (NOD) mice in a SS-like model. In this study, we investigated the effect of blueberry 'stem' water extract (BStEx) on lacrimal hyposecretion in NOD mice. MATERIALS AND METHODS Male NOD mice were fed 1% BStEx or control (AIN-93G) for 2, 4, or 6 weeks from 4 weeks of age. Pilocarpine-induced tear secretion was measured using a phenol red-impregnated thread. The lacrimal glands were histologically evaluated by HE staining. Inflammatory cytokine levels in the lacrimal glands were measured using ELISA. Immunostaining was performed to examine aquaporin 5 (AQP5) localization. The expression levels of autophagy-related proteins, AQP5, and phosphorylated AMPK were measured using western blotting. RESULTS After feeding BStEx to mice for 4 or 6 weeks, tear volume was observed to have increased in the BStEx group compared with that in the control group. There were no significant differences in inflammatory cell infiltration, autophagy-related protein expression, or the localization and expression of AQP5 in the lacrimal glands between the two groups. In contrast, AMPK phosphorylation increased in the BStEx group. CONCLUSION BStEx prevented lacrimal hyposecretion in the SS-like model of male NOD mice, probably by opening tight junctions via the activation of AMPK in lacrimal acinar cells.
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Affiliation(s)
- Kenjirou Ogawa
- Institute for Tenure Track Promotion, University of Miyazaki, Miyazaki, Japan;
| | - Yuta Ohno
- Department of Pharmacology, Asahi University School of Dentistry, Mizuho, Japan
| | - Akane Tagashira
- Department of Biochemistry and Applied Biosciences, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
| | - Karin Urata
- Graduate School of Agriculture, University of Miyazaki, Miyazaki, Japan
| | - Keitaro Satoh
- Department of Pharmacology, Meikai University School of Dentistry, Sakado, Japan
| | - Naruki Fujimoto
- Laboratory of Veterinary Pharmacology, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
| | - Hiroko Sonoda
- Laboratory of Veterinary Pharmacology, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
| | - Masahiro Ikeda
- Laboratory of Veterinary Pharmacology, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
| | - Toshiyuki Matsuzaki
- Department of Anatomy and Cell Biology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Kazuo Nishiyama
- Department of Biochemistry and Applied Biosciences, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
- Graduate School of Agriculture, University of Miyazaki, Miyazaki, Japan
| | - Hisato Kunitake
- Department of Biochemistry and Applied Biosciences, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
- Graduate School of Agriculture, University of Miyazaki, Miyazaki, Japan
| | | | - Masao Yamasaki
- Department of Biochemistry and Applied Biosciences, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
- Graduate School of Agriculture, University of Miyazaki, Miyazaki, Japan
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Ogawa K, Urata K, Suzuki Y, Sugamoto K, Goto Y, Nakayama T, Nishiyama K, Kunitake H, Yamasaki M. Blueberry stem extract and stem active components prevent blue light-emitting diode light-induced retinal photoreceptor cell damage in vitro. Biosci Biotechnol Biochem 2023; 87:378-388. [PMID: 36617234 DOI: 10.1093/bbb/zbad001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 12/22/2022] [Indexed: 01/09/2023]
Abstract
Blue light causes retinal damage that can lead to ocular diseases such as age-related macular degeneration. In this study, we determined the protective effect of blueberry stem extract (BStEx) and active components on blue light-emitting diode (LED) light-induced retinal photoreceptor cell damage in vitro. Photoreceptor cells cultured in the presence of BStEx or components were exposed to blue light to induce cell damage. BStEx, fractions of BStEx containing proanthocyanidins, chlorogenic acid, catechin, and epicatechin prevented the cell damage and/or inhibited the generation of reactive oxygen species (ROS). Furthermore, BStEx reduced apoptosis and cell death, and inhibited the phosphorylation of p38 mitogen-activated protein kinase and c-Jun N-terminal kinase leading to cellular apoptosis induced by blue light exposure. These findings suggest that BStEx and components exert a protective effect against blue light-induced photoreceptor cell damage through the inhibition of MAPK phosphorylation and ROS production.
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Affiliation(s)
- Kenjirou Ogawa
- Institute for Tenure Track Promotion, University of Miyazaki, 1-1 Gakuen Kibanadai-nishi, Miyazaki, Japan
| | - Karin Urata
- Graduate School of Agriculture, University of Miyazaki, 1-1 Gakuen Kibanadai-nishi, Miyazaki, Japan
| | - Yosuke Suzuki
- Department of Applied Chemistry, Faculty of Engineering, University of Miyazaki, 1-1 Gakuen Kibanadai-nishi, Miyazaki, Japan
| | - Kazuhiro Sugamoto
- Department of Applied Chemistry, Faculty of Engineering, University of Miyazaki, 1-1 Gakuen Kibanadai-nishi, Miyazaki, Japan
| | - Yo Goto
- Biolabo Co., Ltd. 7-2-6 Minamimachi, Minatoshima, Chuouku, Kobe-City, Hyogo, Japan
| | - Takayuki Nakayama
- Biolabo Co., Ltd. 7-2-6 Minamimachi, Minatoshima, Chuouku, Kobe-City, Hyogo, Japan
| | - Kazuo Nishiyama
- Graduate School of Agriculture, University of Miyazaki, 1-1 Gakuen Kibanadai-nishi, Miyazaki, Japan
| | - Hisato Kunitake
- Graduate School of Agriculture, University of Miyazaki, 1-1 Gakuen Kibanadai-nishi, Miyazaki, Japan
| | - Masao Yamasaki
- Graduate School of Agriculture, University of Miyazaki, 1-1 Gakuen Kibanadai-nishi, Miyazaki, Japan
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Urata K, Kajihara I, Miyauchi H, Mijiddorj T, Otsuka-Maeda S, Sakamoto R, Sawamura S, Kanemaru H, Kanazawa-Yamada S, Makino K, Aoi J, Makino T, Fukushima S, Komohara Y, Ihn H. The Warburg effect and tumour immune microenvironment in extramammary Paget's disease: overexpression of lactate dehydrogenase A correlates with immune resistance. J Eur Acad Dermatol Venereol 2020; 34:1715-1721. [PMID: 31838771 DOI: 10.1111/jdv.16145] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 11/12/2019] [Indexed: 01/10/2023]
Abstract
BACKGROUND Extramammary Paget's disease (EMPD) is a rare malignant skin cancer. One of the hallmarks of cancers, including EMPD, is an enhancement of aerobic glycolysis, which is also known as the Warburg effect. In the last step of glycolysis, the enzyme lactate dehydrogenase A (LDHA) catalyzes the conversion of pyruvate to lactic acid, the accumulation of which contributes to the creation of an acidic tumour microenvironment. This in turn results in immunosuppression in various types of cancers. However, the contribution of these pathways has not been well-studied in EMPD. OBJECTIVE To investigate the significance of the Warburg effect and its contribution to the tumour immune microenvironment in EMPD. METHODS The mRNA expression levels of molecules involved in glycolysis and immune-related cytokines were examined by ddPCR. The number of immune cells was assessed by immunohistochemistry (IHC). RESULTS The levels of two glycolytic enzymes, HK2 and LDHA, in tumour tissues were significantly increased compared to those in paired-normal tissues. IHC analyses revealed increased numbers of PD-L1+ , PD-1+ , CD163+ M2 macrophages, Iba1+ macrophages and Foxp3+ Tregs that were associated with high LDHA levels in EMPD. ddPCR demonstrated that multiple cytokines including IL-4, IL-6, IL-10, TGF-β and CCL-2 were upregulated and associated with high LDHA levels in EMPD. Statistical analyses showed that IL-6 mRNA expression correlated with the number of CD163+ , Iba-1+ and Foxp3+ cells. CONCLUSION The Warburg effect contributes to immunomodulation in the tumour microenvironment and further elucidation may lead to better understanding of the pathogenesis of EMPD.
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Affiliation(s)
- K Urata
- Department of Dermatology and Plastic Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - I Kajihara
- Department of Dermatology and Plastic Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Miyauchi
- Department of Dermatology and Plastic Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Mijiddorj
- Department of Dermatology and Plastic Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - S Otsuka-Maeda
- Department of Dermatology and Plastic Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - R Sakamoto
- Department of Dermatology and Plastic Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - S Sawamura
- Department of Dermatology and Plastic Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Kanemaru
- Department of Dermatology and Plastic Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - S Kanazawa-Yamada
- Department of Dermatology and Plastic Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - K Makino
- Department of Dermatology and Plastic Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - J Aoi
- Department of Dermatology and Plastic Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Makino
- Department of Dermatology and Plastic Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - S Fukushima
- Department of Dermatology and Plastic Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Y Komohara
- Department of Cell Pathology, Graduate School of Medical Sciences, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Ihn
- Department of Dermatology and Plastic Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
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Urata K, Shinoda M, Ikutame D, Iinuma T, Iwata K. Involvement of transient receptor potential vanilloid 2 in intra-oral incisional pain. Oral Dis 2018; 24:1093-1100. [PMID: 29505690 DOI: 10.1111/odi.12853] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 02/27/2018] [Accepted: 02/27/2018] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To examine whether transient receptor potential vanilloid 2 (TRPV2) contributes to the changes in intra-oral thermal and mechanical sensitivity following the incision of buccal mucosa. MATERIALS AND METHODS Buccal mucosal pain threshold was measured after the incision. Changes in the number of TRPV2-immunoreactive (IR) trigeminal ganglion (TG) neurons which innervate the whisker pad skin and buccal mucosa, changes in the number of isolectin B4-negative/isolectin B4-positive TRPV2-IR TG neurons which innervate the whisker pad skin and the buccal mucosa, and the effect of peripheral TRPV2 antagonism on the pain threshold of incisional whisker pad skin and buccal mucosa were examined after these injuries. RESULTS Buccal mucosal pain hypersensitivities were induced on day 3 following the incision. The total number of TRPV2-IR TG neurons and the number of isolectin B4-negative TRPV2-IR TG neurons which innervate the whisker pad skin and buccal mucosa were increased. Buccal mucosal TRPV2 antagonism completely suppressed the heat and mechanical hypersensitivities, but not cold hypersensitivity. TRPV2 antagonist administration to the incisional whisker pad skin only partially suppressed pain hypersensitivities. CONCLUSION The increased expression of TRPV2 in peptidergic TG neurons innervating the incisional buccal mucosa is predominantly involved in buccal mucosal heat hyperalgesia and mechanical allodynia following buccal mucosal incision.
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Affiliation(s)
- K Urata
- Department of Complete Denture Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan
| | - M Shinoda
- Department of Physiology, Nihon University School of Dentistry, Tokyo, Japan
| | - D Ikutame
- Department of Complete Denture Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan
| | - T Iinuma
- Department of Complete Denture Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan
| | - K Iwata
- Department of Physiology, Nihon University School of Dentistry, Tokyo, Japan
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Yamamoto M, Shibata T, Tsuzuki K, Sato M, Kimura H, Okano F, Kawashima H, Suzuki S, Shinohara K, Urata K. Engineering Design, Installation, and Conditioning of Ferritic Steel Plates/Wall for AMTEX in JFT-2M. Fusion Science and Technology 2017. [DOI: 10.13182/fst06-a1098] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Yamamoto
- Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - T. Shibata
- Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - K. Tsuzuki
- Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - M. Sato
- Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - H. Kimura
- Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - F. Okano
- Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - H. Kawashima
- Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - S. Suzuki
- Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - K. Shinohara
- Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - K. Urata
- Mitsubishi Heavy Industries, Ltd., Office Tower Z 1-3-12, Harumi, Chuo-ku Tokyo 140-6125, Japan
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Shinohara K, Sato M, Kawashima H, Tsuzuki K, Suzuki S, Urata K, Isei N, Tani T, Kikuchi K, Shibata T, Kimura H, Miura Y, Kusama Y, Yamamoto M. Ripple Reduction with Ferritic Insert in JFT-2M. Fusion Science and Technology 2017. [DOI: 10.13182/fst06-a1094] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- K. Shinohara
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka, Ibaraki 311-0193, Japan
| | - M. Sato
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka, Ibaraki 311-0193, Japan
| | - H. Kawashima
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka, Ibaraki 311-0193, Japan
| | - K. Tsuzuki
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka, Ibaraki 311-0193, Japan
| | - S. Suzuki
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka, Ibaraki 311-0193, Japan
| | - K. Urata
- Mitsubishi Heavy Industries, Ltd., Kobe Shipyard and Machinery Works, 1-1-1 Wadasaki, Hyogo-ku Kobe, Hyogo 652-8585, Japan
| | - N. Isei
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka, Ibaraki 311-0193, Japan
| | - T. Tani
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka, Ibaraki 311-0193, Japan
| | - K. Kikuchi
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka, Ibaraki 311-0193, Japan
| | - T. Shibata
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka, Ibaraki 311-0193, Japan
| | - H. Kimura
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka, Ibaraki 311-0193, Japan
| | - Y. Miura
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka, Ibaraki 311-0193, Japan
| | - Y. Kusama
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka, Ibaraki 311-0193, Japan
| | - M. Yamamoto
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka, Ibaraki 311-0193, Japan
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Kobayashi H, Naito M, Masuya M, Maruyama M, Urata K, Takahashi Y, Tomaru A, Fujiwara K, Ohnishi M, Takagi T, Kobayashi T, D'Alessandro-Gabazza C, Urawa M, Gabazza EC, Taguchi O, Takei Y. Circulating fibrocytes correlate with the asthma control test score. Allergol Immunopathol (Madr) 2016; 44:191-6. [PMID: 26774356 DOI: 10.1016/j.aller.2015.09.007] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 09/05/2015] [Accepted: 09/30/2015] [Indexed: 11/29/2022]
Abstract
BACKGROUND Bronchial asthma is characterised by airway inflammation and remodelling with a decline of lung function. Fibrocytes are bone marrow-derived mesenchymal progenitor cells that play important roles in the pathogenesis of airway remodelling. Several clinical parameters are currently being used in routine clinical practice to assess outcome of therapy in asthma including frequency of rescue with short-acting β2-agonist and the asthma control test. In this study, we hypothesised that asthma control test is associated with circulating levels of fibrocytes in bronchial asthma. METHODS There were 20 patients with asthma and seven healthy controls. The number of CD45(+)Collagen I(+) circulating fibrocytes was assessed in the peripheral blood by flow cytometry. RESULTS The number of circulating fibrocytes was significantly increased in asthma patients with moderate and severe disease compared to controls, and it was inversely correlated with % forced expiratory volume in one second and % forced vital capacity (%FVC). The frequency of inhalation of short-acting β2 agonist and the asthma control test score was significantly and inversely correlated with the number of circulating fibrocytes. CONCLUSION The results of this study showed that the number of circulating fibrocytes is inversely correlated with clinical asthma control parameters, further supporting the relevance of measuring circulating fibrocytes as a marker of clinical control in bronchial asthma.
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Affiliation(s)
- H Kobayashi
- Department of Pulmonary and Critical Care Medicine, Mie University Graduate School of Medicine, Edobashi 2-174, Tsu City, Mie Prefecture 514-8507, Japan
| | - M Naito
- Department of Pulmonary and Critical Care Medicine, Mie University Graduate School of Medicine, Edobashi 2-174, Tsu City, Mie Prefecture 514-8507, Japan
| | - M Masuya
- Department of Hematopoietic Pathology, Mie University Graduate School of Medicine, Edobashi 2-174, Tsu City, Mie Prefecture 514-8507, Japan
| | - M Maruyama
- Department of Hematopoietic Pathology, Mie University Graduate School of Medicine, Edobashi 2-174, Tsu City, Mie Prefecture 514-8507, Japan
| | - K Urata
- Department of Pulmonary and Critical Care Medicine, Mie University Graduate School of Medicine, Edobashi 2-174, Tsu City, Mie Prefecture 514-8507, Japan
| | - Y Takahashi
- Department of Pulmonary and Critical Care Medicine, Mie University Graduate School of Medicine, Edobashi 2-174, Tsu City, Mie Prefecture 514-8507, Japan
| | - A Tomaru
- Department of Pulmonary and Critical Care Medicine, Mie University Graduate School of Medicine, Edobashi 2-174, Tsu City, Mie Prefecture 514-8507, Japan
| | - K Fujiwara
- Department of Pulmonary and Critical Care Medicine, Mie University Graduate School of Medicine, Edobashi 2-174, Tsu City, Mie Prefecture 514-8507, Japan
| | - M Ohnishi
- Department of Pulmonary and Critical Care Medicine, Mie University Graduate School of Medicine, Edobashi 2-174, Tsu City, Mie Prefecture 514-8507, Japan
| | - T Takagi
- Department of Pulmonary and Critical Care Medicine, Mie University Graduate School of Medicine, Edobashi 2-174, Tsu City, Mie Prefecture 514-8507, Japan
| | - T Kobayashi
- Department of Pulmonary and Critical Care Medicine, Mie University Graduate School of Medicine, Edobashi 2-174, Tsu City, Mie Prefecture 514-8507, Japan
| | - C D'Alessandro-Gabazza
- Department of Immunology, Mie University Graduate School of Medicine, Edobashi 2-174, Tsu City, Mie Prefecture 514-8507, Japan
| | - M Urawa
- Department of Pulmonary and Critical Care Medicine, Mie University Graduate School of Medicine, Edobashi 2-174, Tsu City, Mie Prefecture 514-8507, Japan; Department of Immunology, Mie University Graduate School of Medicine, Edobashi 2-174, Tsu City, Mie Prefecture 514-8507, Japan
| | - E C Gabazza
- Department of Immunology, Mie University Graduate School of Medicine, Edobashi 2-174, Tsu City, Mie Prefecture 514-8507, Japan.
| | - O Taguchi
- Department of Pulmonary and Critical Care Medicine, Mie University Graduate School of Medicine, Edobashi 2-174, Tsu City, Mie Prefecture 514-8507, Japan
| | - Y Takei
- Department of Pulmonary and Critical Care Medicine, Mie University Graduate School of Medicine, Edobashi 2-174, Tsu City, Mie Prefecture 514-8507, Japan
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Ohno Y, Mita A, Ikegami T, Masuda Y, Urata K, Nakazawa Y, Kobayashi A, Miyagawa S. Successful active immunization using a hepatitis B virus vaccination protocol for a recipient with hepatitis B core antibody-positive liver graft. Transplant Proc 2015; 46:721-5. [PMID: 24767333 DOI: 10.1016/j.transproceed.2013.12.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Revised: 11/26/2013] [Accepted: 12/10/2013] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Donor shortages occasionally necessitate the use of hepatic allografts from hepatitis B core antibody-positive (HBcAb+) donors, with an attendant risk of post-transplantation hepatitis B virus (HBV) infection. The aim of the present study was to develop and evaluate a protocol of active immunization for prevention of post-transplantation de novo HBV infection in patients receiving liver grafts from HBcAb+ donors. PATIENTS AND METHODS Ten patients who had received HBcAb+ liver grafts at Shinshu University Hospital between October 1996 and December 2012 were enrolled. All the recipients were negative for HBV serological tests, and HBV-DNA. Hepatitis B immunoglobulin (HBIG) was given routinely in the peritransplantation and post-transplantation periods, without antiviral drugs. Subcutaneous vaccination with recombinant HBV was given at a dosage of 20 μg in adults and 5 μg in children concomitant with HBIG until acquisition of active immunization. The timing to start HBV vaccination was dependent on the condition of the patient. RESULTS The median follow-up period after liver transplantation was 140 months, and the median period after transplantation until the start of vaccination was 7.0 months. Nine patients (90%) acquired active immunity after a median number of 4 (range, 2-13) vaccinations (hepatitis B surface antibody >300 mIU/mL for 1 year, or >100 mIU/mL thereafter), and did not require HBIG administration thereafter. None had any side effects of HBV vaccination or developed hepatitis B infection during the study period. Four fast responders who achieved antibody high titers by active immunization within 9 months received pretransplantation vaccinations, whereas 5 slow responders did not. CONCLUSIONS Our vaccination protocol provides a new effective strategy for prevention of de novo hepatitis B infection after liver transplantation in recipients with HBcAb+ liver grafts. Pretransplantation HBV vaccination was helpful for the post-transplantation vaccine response.
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Affiliation(s)
- Y Ohno
- Division of Transplantation, Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan
| | - A Mita
- Division of Transplantation, Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan.
| | - T Ikegami
- Division of Transplantation, Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan
| | - Y Masuda
- Division of Transplantation, Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan
| | - K Urata
- Division of Transplantation, Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan
| | - Y Nakazawa
- Division of Transplantation, Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan
| | - A Kobayashi
- Division of Transplantation, Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan
| | - S Miyagawa
- Division of Transplantation, Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan
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Urata K, Shinoda M, Honda K, Lee J, Maruno M, Ito R, Gionhaku N, Iwata K. Involvement of TRPV1 and TRPA1 in incisional intraoral and extraoral pain. J Dent Res 2015; 94:446-54. [PMID: 25576470 DOI: 10.1177/0022034514565645] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Thermal and mechanical hypersensitivity in the injured region is a common complication. Although it is well known clinically that thermal and mechanical sensitivity of the oral mucosa is different from that of the skin, the mechanisms underlying injured pain of the oral mucosa remain poorly understood. The transient receptor potential (TRP) vanilloid 1 (TRPV1) and TRP ankyrin 1 (TRPA1) in primary afferent neurons are known to contribute to pathological pain. Therefore, we investigated whether TRPV1 and/or TRPA1 contribute to thermal and mechanical hypersensitivity following oral mucosa or whisker pad skin incision. Strong heat and mechanical and cold hypersensitivity was caused in the buccal mucosa and whisker pad skin following incisions. On day 3 after the incisions, the number of TRPV1-immunoreactive (IR) and TRPA1-IR trigeminal ganglion (TG) neurons innervating the buccal mucosa and whisker pad skin was significantly increased, and the number of TRPV1/TRPA1-IR TG neurons innervating whisker pad skin, but not the buccal mucosa, was significantly increased. Administration of the TRPV1 antagonist, SB366791, to the incised site produced a significant suppression of heat hyperalgesia in both the buccal mucosa and whisker pad skin, as well as mechanical allodynia in the whisker pad skin. Administration of the TRPA1 antagonist, HC-030031, to the incised site suppressed mechanical allodynia and cold hyperalgesia in both the buccal mucosa and whisker pad skin, as well as heat hyperalgesia in the whisker pad skin. These findings indicate that altered expressions of TRPV1 and TRPA1 in TG neurons are involved in thermal and mechanical hypersensitivity following the buccal mucosa and whisker pad skin incision. Moreover, diverse changes in the number of TRPV1 and TRPA1 coexpressed TG neurons in whisker pad skin-incised rats may contribute to the intracellular interactions of TRPV1 and TRPA1 associated with whisker pad skin incision, whereas TRPV1 and TRPA1 expression in individual TG neurons is involved in buccal mucosa-incised pain.
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Affiliation(s)
- K Urata
- Department of Complete Denture Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan
| | - M Shinoda
- Department of Physiology, Nihon University School of Dentistry, Tokyo, Japan Division of Functional Morphology, Dental Research Center, Nihon University School of Dentistry, Tokyo, Japan
| | - K Honda
- Department of Physiology, Nihon University School of Dentistry, Tokyo, Japan
| | - J Lee
- Department of Complete Denture Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan
| | - M Maruno
- Department of Complete Denture Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan
| | - R Ito
- Department of Complete Denture Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan
| | - N Gionhaku
- Department of Complete Denture Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan
| | - K Iwata
- Department of Physiology, Nihon University School of Dentistry, Tokyo, Japan Division of Functional Morphology, Dental Research Center, Nihon University School of Dentistry, Tokyo, Japan Division of Applied System Neuroscience Advanced Medical Research Center, Nihon University Graduate School of Medical Science, Tokyo, Japan
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10
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Mita A, Ikegami T, Masuda Y, Katsuyama Y, Ohno Y, Urata K, Nakazawa Y, Kobayashi A, Miyagawa S. Optimal Initial Dose of Orally Administered Once-daily Extended-release Tacrolimus Following Intravenous Tacrolimus Therapy After Liver Transplantation. Transplant Proc 2014; 46:794-6. [DOI: 10.1016/j.transproceed.2014.01.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Revised: 12/27/2013] [Accepted: 01/13/2014] [Indexed: 11/26/2022]
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11
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Ohno Y, Mita A, Ikegami T, Masuda Y, Urata K, Nakazawa Y, Kobayashi A, Terada M, Ikeda S, Miyagawa S. Temporary auxiliary partial orthotopic liver transplantation using a small graft for familial amyloid polyneuropathy. Am J Transplant 2012; 12:2211-9. [PMID: 22500969 DOI: 10.1111/j.1600-6143.2012.04061.x] [Citation(s) in RCA: 9] [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: 01/25/2023]
Abstract
Donor shortage is a major issue in liver transplantation. We have successfully performed temporary auxiliary partial orthotopic liver transplantation (APOLT) using a small volume graft procured from a living donor for recipients with familial amyloid polyneuropathy (FAP). The aim of this study was to evaluate this procedure by comparing it with standard living donor liver transplantation (LDLT). We compared 13 recipients undergoing this procedure with 23 recipients undergoing a standard LDLT for the treatment of FAP. The estimated donor graft volume and the graft volume/recipient's standard liver volume ratio were significantly smaller in the temporary APOLT group than in the standard LDLT group. Postoperative complications were comparable, although the hospital stay was longer in the temporary APOLT group. All the patients safely underwent a remnant native liver resection about 2 months after their first operation in the temporary APOLT group. No symptoms related to FAP developed before the remnant liver resection, and no significant differences in graft and patient survival were observed between the two groups. We successfully performed temporary APOLT using a small volume liver graft without postoperative liver failure for FAP. Temporary APOLT for FAP might be a useful alternative procedure for expanding the donor pool for LDLT.
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Affiliation(s)
- Y Ohno
- Department of Surgery, Division of Transplantation, Shinshu University School of Medicine, Matsumoto, Japan
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12
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Ohno Y, Mita A, Ikegami T, Masuda Y, Urata K, Nakazawa Y, Kobayashi A, Terada M, Ikeda S, Miyagawa S. Temporary auxiliary partial orthotopic liver transplantation using a small graft for familial amyloid polyneuropathy. Am J Transplant 2012. [PMID: 22500969 DOI: 10.1111/j.1600-6143.2012.04061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Donor shortage is a major issue in liver transplantation. We have successfully performed temporary auxiliary partial orthotopic liver transplantation (APOLT) using a small volume graft procured from a living donor for recipients with familial amyloid polyneuropathy (FAP). The aim of this study was to evaluate this procedure by comparing it with standard living donor liver transplantation (LDLT). We compared 13 recipients undergoing this procedure with 23 recipients undergoing a standard LDLT for the treatment of FAP. The estimated donor graft volume and the graft volume/recipient's standard liver volume ratio were significantly smaller in the temporary APOLT group than in the standard LDLT group. Postoperative complications were comparable, although the hospital stay was longer in the temporary APOLT group. All the patients safely underwent a remnant native liver resection about 2 months after their first operation in the temporary APOLT group. No symptoms related to FAP developed before the remnant liver resection, and no significant differences in graft and patient survival were observed between the two groups. We successfully performed temporary APOLT using a small volume liver graft without postoperative liver failure for FAP. Temporary APOLT for FAP might be a useful alternative procedure for expanding the donor pool for LDLT.
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Affiliation(s)
- Y Ohno
- Department of Surgery, Division of Transplantation, Shinshu University School of Medicine, Matsumoto, Japan
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13
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Masuda Y, Mita A, Ohno Y, Urata K, Nakazawa Y, Ikegami T, Masaru T, Miyagawa S. Noncompliance with Medications in Pediatric Patients after Living-Donor Liver Transplantation. Transplant Proc 2010; 42:4191-2. [DOI: 10.1016/j.transproceed.2010.09.087] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2010] [Accepted: 09/22/2010] [Indexed: 10/18/2022]
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14
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Uchikawa Y, Ikegami T, Masuda Y, Ohno Y, Mita A, Urata K, Nakazawa Y, Terada M, Miyagawa S. Administration of dalteparin based on the activated clotting time for prophylaxis of hepatic vessel thrombosis in living donor liver transplantation. Transplant Proc 2010; 41:3784-90. [PMID: 19917388 DOI: 10.1016/j.transproceed.2009.04.011] [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] [Subscribe] [Scholar Register] [Received: 01/27/2009] [Accepted: 04/13/2009] [Indexed: 12/17/2022]
Abstract
Beginning in 2004, dalteparin doses based on activated clotting time (ACT) were administered for hepatic vessel thrombosis prophylaxis in living donor liver transplantation (LDLT). We verified the feasibility of this new therapy by comparing it with the previous one. From 1993 through 2008, 42 metabolic liver patients who underwent LDLT were divided into two groups. Group A (1993-2003, n = 32) was administered a fixed dalteparin dose and a large amount of fresh frozen plasma (FFP); Group B (2004-2008, n = 10) was administered an appropriate dosage of dalteparin to maintain the ACT levels from 140 to 150 seconds and a small amount of FFP. Group B was administered a lesser amount of FFP and more dalteparin. This resulted in longer activated partial thromboplastin time, lower fibrinogen degradation products D-dimer, and lower aspartate aminotransferase levels compared to group A; all differences were significant. Group B showed neither thrombotic nor hemorrhagic complications. Anticoagulation therapy comprising adjustment of the dalteparin dose based on ACT reduces thrombotic complications without increasing hemorrhagic complications. ACT measurement is a simple, reliable method for bedside monitoring of dalteparin anticoagulant effects for LDLT.
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Affiliation(s)
- Y Uchikawa
- Department of Surgery, Shinshu University School of Medicine, Nagano, Japan
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15
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Ikegami T, Masuda Y, Ohno Y, Urata K, Nakazawa Y, Miwa S, Hashikura Y, Miyagawa S. Arterial Reconstruction in a Case of Subintimal Dissection of Celiac Arterial Tributaries in Living Donor Liver Transplantation: A Case Report. Transplant Proc 2008; 40:3794-6. [DOI: 10.1016/j.transproceed.2008.06.083] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2008] [Accepted: 06/27/2008] [Indexed: 10/21/2022]
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16
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Abstract
Domino liver transplantation (DLT) has been developed as a method to expand the donor pool. In living donors DLT, the prime concern is to avoid any disadvantage to the donor and the first recipient. Seven DLTs were performed among 211 patients who underwent living donor liver transplantation. The domino recipients included six with hepatocellular carcinoma and one with citrullinemia. The domino grafts were obtained from patients with familial amyloid polyneuropathy (FAP) including the left liver in three cases and the right liver in four. Among the seven domino recipients, a 64-year-old woman with advanced hepatocellular carcinoma died of lung metastasis. The other six domino recipients are alive without FAP symptoms. In living donor liver transplantation, because the vessels of the graft from the first donor are not long enough for anastomosis, the hepatic vessels must be left as long as possible when removing the liver from the FAP patients in order to ensure sufficient safety for vascular reconstruction. With careful decision making during the procedure, such as where to divide the vessels in the FAP patients, DLT may help address the shortage of liver grafts.
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Affiliation(s)
- Y Hashikura
- Division of Transplantation, Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan.
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Ogino S, Hashikura Y, Katsuyama Y, Ikegami T, Nakazawa Y, Urata K, Terada M, Miyagawa S, Kawasaki S. Conversion from tacrolimus to cyclosporine microemulsion therapy in liver transplant recipients. Transplant Proc 2004; 36:299S-301S. [PMID: 15041357 DOI: 10.1016/j.transproceed.2003.12.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The calcineurin inhibitors cyclosporine and tacrolimus have distinct advantages and drawbacks. Therefore it is important to tailor their use to the patient's tolerance. In some patients, the need to ameliorate the adverse effects of tacrolimus may necessitate a switch to cyclosporine-based therapy. Rescue therapy with a cyclosporine microemulsion (Neoral)-based regimen for transplant patients intolerant of tacrolimus has been evaluated to assess the best method of switching and determine the initial and maintenance doses of Neoral in children and adults. Our aims were to evaluate not only these facets, but also the pharmacokinetics of Neoral in stable patients, including target 2-hour postdose blood concentrations (C2) of cyclosporine in liver transplant recipients. Eighteen liver transplant patients switched from tacrolimus to Neoral underwent a program of cyclosporine blood level monitoring. The conversions were conducted safely; the incidence of acute rejection episodes was low (11.1%). Statistical analysis showed that the C2 correlated with the area under the time-blood concentration curve of cyclosporine for 0 to 4 hours after dosing (R=0.970). We determined the maintenance doses of Neoral for pediatric and adult patients as well as the feasibility of C2 quantitated monitoring in liver transplantation.
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Affiliation(s)
- S Ogino
- Division of Liver Transplantation, Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan
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Matsukawa M, Ishida S, Sakasai A, Urata K, Senda I, Kurita G, Tamai H, Sakurai S, Miura Y, Masaki K, Shimada K, Terakado T. Design and analysis of plasma position and shape control in superconducting tokamak JT-60SC. Fusion Engineering and Design 2003. [DOI: 10.1016/s0920-3796(03)00278-3] [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: 11/28/2022]
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19
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Kudo Y, Sakurai S, Masaki K, Urata K, Sasajima T, Matsukawa M, Sakasai A, Ishida S. Design and Structural Analysis for the Vacuum Vessel of Superconducting Tokamak JT-60SC. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Y. Kudo
- UCSD, La Jolla, CA 92093-0417, Naka Fusion Research Establishment Naka-machi, Naka-gun, Ibaraki-ken, 311-0193 Japan Tel/Fax: +81-(0)-29-270-7431/7449
| | - S. Sakurai
- UCSD, La Jolla, CA 92093-0417, Naka Fusion Research Establishment Naka-machi, Naka-gun, Ibaraki-ken, 311-0193 Japan Tel/Fax: +81-(0)-29-270-7431/7449
| | - K. Masaki
- UCSD, La Jolla, CA 92093-0417, Naka Fusion Research Establishment Naka-machi, Naka-gun, Ibaraki-ken, 311-0193 Japan Tel/Fax: +81-(0)-29-270-7431/7449
| | - K. Urata
- UCSD, La Jolla, CA 92093-0417, Naka Fusion Research Establishment Naka-machi, Naka-gun, Ibaraki-ken, 311-0193 Japan Tel/Fax: +81-(0)-29-270-7431/7449
| | - T. Sasajima
- UCSD, La Jolla, CA 92093-0417, Naka Fusion Research Establishment Naka-machi, Naka-gun, Ibaraki-ken, 311-0193 Japan Tel/Fax: +81-(0)-29-270-7431/7449
| | - M. Matsukawa
- UCSD, La Jolla, CA 92093-0417, Naka Fusion Research Establishment Naka-machi, Naka-gun, Ibaraki-ken, 311-0193 Japan Tel/Fax: +81-(0)-29-270-7431/7449
| | - A. Sakasai
- UCSD, La Jolla, CA 92093-0417, Naka Fusion Research Establishment Naka-machi, Naka-gun, Ibaraki-ken, 311-0193 Japan Tel/Fax: +81-(0)-29-270-7431/7449
| | - S. Ishida
- UCSD, La Jolla, CA 92093-0417, Naka Fusion Research Establishment Naka-machi, Naka-gun, Ibaraki-ken, 311-0193 Japan Tel/Fax: +81-(0)-29-270-7431/7449
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20
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Urata K, Kawasaki S. [Liver transplantation]. Gan To Kagaku Ryoho 2001; 28:1985-91. [PMID: 11791379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
In western countries, liver transplantation in patients with hepatocellular carcinoma (HCC) has been performed with the use of grafts from brain dead donors, while in Japan this has begun being performed using partial liver grafts from living donors. This report describes our current results after liver transplantation for HCC and domino liver transplantation, which was introduced to resolve the organ shortage.
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Affiliation(s)
- K Urata
- Department of Surgery I, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto 390-8621, Japan
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21
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Urata K. [The pharmacy and the civil life in Kyoto in the medieval ages] (Jpn). Yakushigaku Zasshi 2001; 22:4-6. [PMID: 11621482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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22
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Urata K, Suzuki Y, Kudough F, Kimura H, Miura Y, Yamamoto M. Dynamic analyses of electromagnetic force on ferritic board for AMTEX on JFT-2M. Fusion Engineering and Design 2001. [DOI: 10.1016/s0920-3796(01)00364-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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23
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Hashikura Y, Kawasaki S, Terada M, Ikegami T, Nakazawa Y, Urata K, Chisuwa H, Mita A, Ohno Y, Miyagawa S. Long-term results of living-related donor liver graft transplantation: a single-center analysis of 110 transplants. Transplantation 2001; 72:95-9. [PMID: 11468541 DOI: 10.1097/00007890-200107150-00019] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Difficulties of cadaveric donation and serious donor shortage have led to the development and popularization of living-related donor liver graft transplantation (LRLT). Because the history of this procedure is rather short, important aspects specific to this procedure have not been sufficiently documented. The objective of this study was to analyze a single center's 10-year experience with 110 LRLT in pediatric and adult patients with end-stage liver diseases. METHODS The medical records of 110 consecutive patients who underwent LRLT were reviewed. The recipients were comprised of 72 children and 38 adults. The graft volume corresponded to 26-192% of the recipient's standard liver volume. The relationship between pretransplant covariates and patient and graft survival was analyzed. Actuarial patient/graft survival rates were determined at 1, 3, and 5 years. The type and incidence of posttransplant complications were analyzed, as was long-term graft function. RESULTS The 1-, 3-, and 5-year actuarial patient and graft survival rates were 88%, 85%, and 85%, respectively. Log-rank test demonstrated that ABO-compatibility predicted patient survival rate, whereas patient age, underlying disease, patient's clinical status, donor-recipient relation, donor age, and graft volume/standard liver volume ratio did not. Long-term liver function remains excellent. All the donors have returned to normal daily lives with an uneventful course. CONCLUSIONS LRLT is an efficacious procedure that provides excellent short-term and long-term survival. The indication criteria for both recipient and donor were legitimate in this series, except for transplant across ABO-incompatibility. Cautious expansion of this procedure may be justified under the situation of serious shortage of cadaveric donor.
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Affiliation(s)
- Y Hashikura
- Department of Surgery, Shinshu University School of Medicine, Asahi 3-1-1, Matsumoto 390-8621, Japan
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Abstract
OBJECTIVE To define the mechanism of infection-induced damage of sperm. DESIGN The effect of lipopolysaccharide (LPS)-induced reactive oxygen species (ROS) on sperm motility and its modification by scavengers were investigated. SETTING Research laboratory of a university hospital. PATIENT(S) Normozoospermic semen samples were obtained from 37 healthy volunteers. INTERVENTION(S) The sperms were incubated in the presence of LPS with or without scavengers. MAIN OUTCOME MEASURE(S) Sperm motility was evaluated by a sperm quality analyzer (SQAIIB). ROS formation in semen samples was measured by a Berthold luminometer (LB953). RESULT(S) Motility of spermatozoa was decreased in the LPS-treated samples compared with that in the control groups. ROS was significantly higher in the LPS-treated groups than in the control groups. The addition of ROS scavengers restored the motility index and suppressed ROS production in the LPS-treated semen samples. CONCLUSION(S) These data suggest that endotoxin-induced excessive production of ROS is responsible for the decrease in sperm motility and that antioxidant therapy may be a therapeutic option for infertile men with bacterial genital tract infection.
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Affiliation(s)
- K Urata
- Department of Obstetrics and Gynecology, Oita Medical University, Hasama, Japan
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25
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Urata K, Kawasaki S. [Liver transplantation for liver metastases of colorectal cancer]. Nihon Geka Gakkai Zasshi 2001; 102:409-11. [PMID: 11394005] [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: 02/20/2023]
Abstract
Because of the critical shortage of donor organs, liver transplantation for metastatic tumors should be reserved for patients in whom long-term survival is possible. Transplantation in patients with metastatic tumors from colorectal cancer has resulted only in short disease-free intervals, and palliation was achieved in only a few patients. In patients with symptomatic neuroendocrine tumors unresponsive to conventional therapy, on the other hand, reasonably good disease-free intervals and prolonged survival may justify liver transplantation.
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Affiliation(s)
- K Urata
- First Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan
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26
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Urata K, Brault A, Rocheleau B, Huet PM. Role of Kupffer cells in the survival after rat liver transplantation with long portal vein clamping times. Transpl Int 2001; 13:420-7. [PMID: 11140240 DOI: 10.1007/s001470050724] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Applying the orthotopic rat liver transplantation (ORLT) model, postoperative survival has been shown to be mainly dependent on the portal vein clamping time (PVCT). It was hypothesized that prolonged intestinal congestion was responsible for the activation of Kupffer cells (KC) with overproduction of TNF, secondary to splanchnic endotoxin accumulation and release on reperfusion. The role of KCs was directly investigated in the context of long PVCTs by eliminating them (using liposome-encapsulated dichloromethylene diphosphonate), by preventing their activation (using a calcium channel blocker, nisoldipine) and by inhibiting TNF production (using thalidomide). Livers from different groups of rats were transplanted following 24-h cold preservation in the UW solution with long PVCTs (from 18-21 min). KCs depletion, preservation with nisoldipine and pretreatment with thalidomide significantly improved survival in conditions using long PVCTs. KC depletion and nisoldipine preservation had no effect on liver enzymes or pathological findings while lung injury was significantly improved. The present data confirm that, in the context of ORLT with long PVCTs, KCs are directly responsible for the systemic endotoxin-like shock syndrome and their effect is mediated through overproduction of TNF.
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Affiliation(s)
- K Urata
- Research Centre-Hôpital Saint-Luc, CHUM, 264 East René Lévesque Blvd, Montréal, QC, H2X 1P1, Canada
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27
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Abstract
Applying the orthotopic rat liver transplantation (ORLT) model, postoperative survival has been shown to be mainly dependent on the portal vein clamping time (PVCT). It was hypothesized that prolonged intestinal congestion was responsible for the activation of Kupffer cells (KC) with overproduction of TNF, secondary to splanchnic endotoxin accumulation and release on reperfusion. The role of KCs was directly investigated in the context of long PVCTs by eliminating them (using liposome-encapsulated dichloromethylene diphosphonate), by preventing their activation (using a calcium channel blocker, nisoldipine) and by inhibiting TNF production (using thalidomide). Livers from different groups of rats were transplanted following 24-h cold preservation in the UW solution with long PVCTs (from 18-21 min). KCs depletion, preservation with nisoldipine and pretreatment with thalidomide significantly improved survival in conditions using long PVCTs. KC depletion and nisoldipine preservation had no effect on liver enzymes or pathological findings while lung injury was significantly improved. The present data confirm that, in the context of ORLT with long PVCTs, KCs are directly responsible for the systemic endotoxin-like shock syndrome and their effect is mediated through overproduction of TNF.
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Affiliation(s)
- K Urata
- Research Centre-Hôpital Saint-Luc, CHUM, 264 East René Lévesque Blvd, Montréal, QC, H2X 1P1, Canada
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Sato F, Hasegawa M, Yamane M, Oyabu I, Urata K, Kudough F, Minato T, Kiryu A, Takagi S, Kuno K, Hirano Y, Yagi Y, Shimada T, Sekine S, Sakakita H, Koguchi H. Design of equilibrium field control coil system of TPE-RX. Fusion Engineering and Design 2001. [DOI: 10.1016/s0920-3796(00)00466-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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29
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Ikegami T, Ogawa S, Ogino S, Wada Y, Ono Y, Chisuwa H, Urata K, Nakazawa Y, Hashikura Y, Terada M, Miyagawa S, Kawasaki S. ["Domino" transplantation]. Nihon Naika Gakkai Zasshi 2001; 90:15-20. [PMID: 11215465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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Wang Z, Sasaki K, Kato N, Urata K, Hirayama T, Saka H. Examination of electrostatic potential distribution across an implanted p-n junction by electron holography. QJM 2001; 50:479-84. [PMID: 11918413 DOI: 10.1093/jmicro/50.6.479] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/18/2023] Open
Abstract
In the manufacture of semiconductor microelectronic devices, a p-n junction is formed usually by implanting a high concentration of impurity into a less heavily doped region and then heat annealing. A Si/Si p-n junction test sample has been made following the above practical process and thinned for electron holographic observation by using argon ion-milling. From the reconstructed phase image, the phase shift induced by potential drop across p-n junction can be seen clearly. To characterize quantitatively this potential drop, the mean inner potential V0 of silicon was measured precisely by electron holographic method. By measuring 25 different crystalline silicon spheres with diameter ranging from 40 to 170 nm, an average result of V0 = 12.16 +/- 0.83 V was obtained. By using this V0 value, a quantitative measurement yields the potential drop approximately 0.70 V, which is reasonably consistent with expected Si/Si junction parameter. The thickness of electric dead layer in depletion region produced from this measuring is approximately 20 nm on each sample surface.
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Affiliation(s)
- Z Wang
- Japan Fine Ceramics Center, Nagoya.
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31
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Affiliation(s)
- K Urata
- First Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan
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32
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Higashima M, Kawasaki Y, Urata K, Sakai N, Nagasawa T, Koshino Y, Sumiya H, Tonami N, Tsuji S, Matsuda H. Regional cerebral blood flow in male schizophrenic patients performing an auditory discrimination task. Schizophr Res 2000; 42:29-39. [PMID: 10706983 DOI: 10.1016/s0920-9964(99)00094-8] [Citation(s) in RCA: 13] [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: 11/17/2022]
Abstract
Regional cerebral blood flow (rCBF) was measured in 11 schizophrenic patients amid 10 normal controls, both at rest and while performing an auditory discrimination task. Single photon emission computed tomography with technetium-99m hexamethylpropylene amine oxime was used for quantitative evaluation of rCBF. The schizophrenic patients showed greater rCBF in the temporal and parietal regions at rest than the controls, but no abnormalities were found in frontal perfusion. During task performance. on the other hand, the patients showed a reduced frontal rCBF. whereas there was no group difference in rCBF in the temporal and parietal regions. In addition, the left> right hemisphere asymmetries of rCBF observed in the controls during task performance were not present in the patients. although there was no group difference in hemisphere laterality in rCBF at rest. These findings suggest that the employment of a cognitive task for neuroimaging studies is useful for detecting abnormalities of brain activation. such as hypofrontality and altered hemisphere laterality. in patients with schizophrenia.
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Affiliation(s)
- M Higashima
- Department of Neuropsychiatry, School of Medicine, Kanazawa University, Kanazawa, Japan.
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Urata K, Brault A, Huet PM. Effects of portal vein clamping time on rat liver microcirculation following extended cold preservation and transplantation. Transpl Int 2000; 12:408-14. [PMID: 10654351 DOI: 10.1007/s001470050250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Orthotopic rat liver transplantation (ORLT) following extended cold preservation in University of Wisconsin (UW) solution has been shown to induce alterations of the hepatic microcirculation, mainly characterized by areas of no-reflow. The present study was performed to determine whether these alterations were related to the portal vein clamping time (PVCT), shown to be the main determinant of survival after ORLT. The hepatic microcirculation was evaluated using the multiple-indicator dilution curve (MIDC) technique after ORLT following 24-hour cold ischemia in UW solution. Two groups of rats were studied: one with PVCTs of less than 14 min (survival conditions) and one with PVCTs of more than 18 min (nonsurvival conditions). Four hours after ORLT, only long PVCTs were associated with small, but significant, nonperfused areas, about 10% of the liver not being perfused by water; however, in both survival and nonsurvival conditions, the sinusoidal sieving function was well-maintained in perfused areas. In addition, liver viability parameters and hepatocyte function were similarly and minimally altered. The hepatic microcirculation is minimally altered 4 h after ORLT following extended cold preservation in UW solution, whatever the survival condition. Although only found after long PVCTs, the low magnitude of areas of no-reflow should not be associated with lethal injury of the transplanted liver, a finding further supporting the concept that survival after ORLT following 24-hour cold preservation in UW solution is mainly influenced by extrahepatic factors.
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Affiliation(s)
- K Urata
- Research Center, Centre Hospitalier de l'Université de Montréal, Québec, Canada
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34
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Nagasawa T, Kamiya T, Kawasaki Y, Higashima M, Urata K, Sakai N, Koshino Y. The relationship between auditory ERP and neuropsychological assessments in schizophrenia. Int J Psychophysiol 1999; 34:267-74. [PMID: 10610050 DOI: 10.1016/s0167-8760(99)00083-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
To clarify the cognitive significance of event-related potential (ERP) abnormalities in schizophrenia, we examined the relationships of amplitudes and latencies of ERP components with performance on neuropsychological tests in schizophrenic patients. Twenty patients underwent the Trail Making B Test (TM-B), which is sensitive to frontal lobe dysfunction, and the logical memory, verbal paired-association, and visual reproduction subtests of the Wechsler Memory Scale (WMS), which are sensitive to temporal lobe dysfunctions, and ERP recordings during performance of an oddball auditory discrimination task. Pearson product-moment correlations indicated that an increased P200 amplitude was correlated with poor performance on the TM-B, whereas a decreased P300 amplitude was correlated with poor performance on the verbal paired-association subtest of the WMS. These findings suggest that a P200 abnormality represents the frontal lobe dysfunction, and a P300 abnormality represents the left temporal lobe dysfunction in schizophrenia.
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Affiliation(s)
- T Nagasawa
- Department of Neuropsychiatry, School of Medicine, Kanazawa University, Japan.
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35
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Sago H, Orita J, Kaguchi H, Ishigami Y, Urata K, Kudough F, Hasegawa M, Oyabu I, Yagi Y, Sekine S, Shimada T, Hirano Y, Sakakita H, Koguchi H. Structural design and manufacturing of TPE-RX vacuum vessel. Fusion Engineering and Design 1999. [DOI: 10.1016/s0920-3796(99)00061-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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36
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Yagi Y, Sekine S, Shimada T, Masiello A, Hayase K, Hirano Y, Hirota I, Kiyama S, Koguchi H, Maejima Y, Sakakita H, Sato Y, Sugisaki K, Hasegawa M, Yamane M, Sato F, Oyabu I, Kuno K, Minato T, Kiryu A, Takagi S, Sako K, Kudough F, Urata K, Kaguchi H, Orita J, Sago H, Ishigami Y. Front-end system of the TPE-RX reversed-field pinch machine. Fusion Engineering and Design 1999. [DOI: 10.1016/s0920-3796(99)00056-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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37
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Narimatsu N, Urata K, Haratake Y, Sakata Y, Tanabe Y. [Effect of vasodilators on femoral-to-radial arterial pressure gradient after cardiopulmonary bypass]. Masui 1999; 48:599-604. [PMID: 10402810] [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: 02/13/2023]
Abstract
In 57 adult patients undergoing valve replacement surgery or valve plastic surgery, pressure gradient between the femoral and radial artery was evaluated after cardiopulmonary bypass (CPB). During CPB, the rectal temperature was kept at mild or moderate hypothermia. Nitrates and prostaglandin E1 were administered in all patients during operation. Patients were divided into two groups; Group A of 31 patients who had history of hypertension and received some vasodilators up to the operation, and Group B of 27 patients who had no history of such medication. There was no difference in patient's characteristics, anesthetic time, CPB time and aortic cross clamping time between the two groups. There was a significant difference between the pre-CPB and post-CPB in hematocrit data. Systemic vascular resistance (SVR) decreased significantly from the pre-CPB level to the post-CPB level. There was no significant difference between Group A and Group B in SVR, but a higher femoral-to-radial artery pressure gradient was observed in Group A until the end of operation. Hypertension and the use of vasodilator change the tone of peripheral blood vessels and intensify femoral-to-radial artery pressure gradient after CPB.
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Affiliation(s)
- N Narimatsu
- Department of Anesthesiology, Saiseikai Kumamoto Hospital
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38
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Miyagawa S, Hashikura Y, Miwa S, Ikegami T, Urata K, Terada M, Kubota T, Nakata T, Kawasaki S. Concomitant caudate lobe resection as an option for donor hepatectomy in adult living related liver transplantation. Transplantation 1998; 66:661-3. [PMID: 9753351 DOI: 10.1097/00007890-199809150-00021] [Citation(s) in RCA: 97] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In this article, we describe a successful adult living related partial liver transplantation (LRLT) using the left lobe with the left-side caudate lobe (the Spiegel lobe and the left side of the paracaval portion). The size of the donor's left lobe was 29% of the recipient's standard liver volume and did not seem to meet our criteria for adult-to-adult LRLT. However, the donor had a thick left-side caudate lobe. The estimated volume of the left lobe with the left-side caudate lobe was 32%, which met our criteria for the adult recipient. The recipient's CT scan on day 87 after transplantation showed the preserved blood flow and no biliary congestion in the left-side caudate lobe, which suggests maintenance of lobe function. This procedure may be an option for adult-to-adult LRLT in which the donor has a thick left-side caudate lobe.
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Affiliation(s)
- S Miyagawa
- First Department of Surgery, Shinshu University, School of Medicine, Matsumoto, Japan.
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39
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Urata K, Nguyen B, Brault A, Lavoie J, Rocheleau B, Huet PM. Decreased survival in rat liver transplantation with extended cold preservation: role of portal vein clamping time. Hepatology 1998; 28:366-73. [PMID: 9695998 DOI: 10.1002/hep.510280211] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
Primary liver graft dysfunction is currently related to cold ischemia-reperfusion injury, although a wide survival range has been reported using 24-hour preservation in cold University of Wisconsin (UW) solution. We hypothesized that the portal vein clamping time (PVCT) played a more important role than cold preservation injury in the postoperative outcome. Rat liver transplantation was performed using different clamping times after 24-hour cold ischemia in the UW solution. Survival rates, plasma tumor necrosis factor (TNF), and nitrate/nitrite levels were examined. Subsequently, the effect of clamping time was evaluated on hepatocyte and sinusoidal endothelial cell (SEC) function using isolated perfused livers. Survival rate was directly related to clamping time length. Marked increases in TNF and nitrate/nitrite levels were found after surgery, particularly after long clamping times. In perfusion studies, the SEC function was already markedly altered after preservation alone and was not further modified by transplantation. By contrast, the hepatocyte function was moderately altered after transplantation, irrespective of clamping times, even when rats operated with long clamping times were in terminal conditions. In rats, 24-hour preservation in cold UW solution is not a severely compromising condition leading to primary liver nonfunction. Long PVCTs are associated with an endotoxemia-like syndrome more related to a warm intestinal ischemia than to cold ischemia injury of the liver.
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Affiliation(s)
- K Urata
- Research Center, Saint-Luc Pavillon, Centre Hospitalier de l'Université de Montréal, Quebec, Canada
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40
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Higashima M, Urata K, Kawasaki Y, Maeda Y, Sakai N, Mizukoshi C, Nagasawa T, Kamiya T, Yamaguchi N, Koshino Y. P300 and the thought disorder factor extracted by factor-analytic procedures in schizophrenia. Biol Psychiatry 1998; 44:115-20. [PMID: 9646893 DOI: 10.1016/s0006-3223(97)00359-4] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
BACKGROUND In order to clarify the clinical significance of P300 as a biologic marker that can reflect schizophrenic symptomatology, many previous studies have evaluated the relationship of P300 with the symptoms on the basis of a positive/negative dichotomy, but yielded inconsistent conclusions. Such a dichotomy has been criticized as being too reductionistic. Recently, most studies with factor-analytic procedures have extracted some symptom factors outside this dichotomy. Therefore, it is important to examine associations of P300 with the symptom factors extracted by these statistical analyses. METHODS In the present study, the amplitudes of P300 were measured by using an auditory oddball paradigm for 73 schizophrenics whose psychopathology was assessed with the Positive and Negative Syndrome Scale (PANSS). RESULTS The principal component analysis of the PANSS items revealed five factors labeled the thought disorder, negative, hostile/excitable, delusional/hallucinatory, and depressive factors. The score for the thought disorder factor correlated negatively with the amplitude of P300 recorded at Pz T5, and T6, but that for the other factors did not. CONCLUSIONS These findings suggest that the reduction of P300 amplitudes recorded at the midline parietal and bilateral temporoparietal regions may be one of the electrophysiologic indices representing the thought disorder clinically observed in schizophrenia.
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Affiliation(s)
- M Higashima
- Department of Neuropsychiatry, School of Medicine, Kanazawa University, Japan
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41
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Nasu K, Yoshimatsu J, Urata K, Miyakawa I. A case of primary non-Hodgkin's lymphoma of the uterine cervix treated by combination chemotherapy (THP-COP). J Obstet Gynaecol Res 1998; 24:157-60. [PMID: 9631606 DOI: 10.1111/j.1447-0756.1998.tb00068.x] [Citation(s) in RCA: 13] [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] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We present a case of primary non-Hodgkin's lymphoma of the uterine cervix, Ann Arbor stage IE. This 64-year-old multiparous Japanese woman showed markedly elevated serum levels of lactate dehydrogenase (LDH) and of soluble interleukin-2 receptor (sIL-2R) at the time of diagnosis. Combination chemotherapy was administered and consisted of pirarubicin, cyclophosphamide, vincristine sulfate, and prednisolone (THP-COP). After 3 courses of such therapy, the serum levels of LDH and of sIL-2R decreased within normal limits, and the patient achieved a complete remission.
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Affiliation(s)
- K Nasu
- Department of Obstetrics and Gynecology, Oita Medical University, Oita, Japan
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42
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Haiqi Z, Yamazaki S, Urata K. The tendency toward English-language papers in MEDLINE. Bull Med Libr Assoc 1997; 85:432-4. [PMID: 9431436 PMCID: PMC226304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Z Haiqi
- National Institute for the Control of Pharmaceutical and Biological Products, Beijing, China
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Abstract
BACKGROUND Nisoldipine, a calcium antagonist, has been reported to improve the quality of grafted rat livers. We thus assessed the protective effect of two calcium antagonists, nisoldipine and nickel, during extended cold ischemia-reperfusion. METHODS Rat livers were isolated and perfused before or after 24 hr of cold ischemia in University of Wisconsin solution (4 degrees C) with or without nisoldipine or nickel. Sinusoidal endothelial cell and hepatocyte functions were measured by hyaluronic acid and taurocholate elimination, respectively. RESULTS Similar alterations in hepatocyte and sinusoidal cell functions were found in all groups after cold ischemia with or without calcium antagonists. In a second set of experiments, liver transplantation was performed in two groups of rats with livers stored under identical conditions with or without nisoldipine. Seven of 12 animals (62.5%) in both groups survived for over 10 days after 24-hr preservation in University of Wisconsin solution. Survival rates were similar in both groups. CONCLUSIONS Calcium antagonists do not appear to have a direct protective effect on sinusoidal endothelial cell and hepatocyte functions, nor on the overall liver preservation after extended cold preservation-reperfusion.
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Affiliation(s)
- E de Broin
- Centre de recherche clinique André-Viallet, Département des Laboratoires, Hôpital Saint-Luc and Université de Montréal, Québec,Canada
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44
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Higashima M, Kawasaki Y, Urata K, Maeda Y, Sakai N, Mizukoshi C, Nagasawa T, Kamiya T, Yamaguchi N, Koshino Y, Matsuda H, Tsuji S, Sumiya H, Hisasda K. Simultaneous observation of regional cerebral blood flow and event-related potential during performance of an auditory task. Brain Res Cogn Brain Res 1996; 4:289-96. [PMID: 8957570 DOI: 10.1016/s0926-6410(96)00065-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Reduced amplitude of the P300 component has been reported consistently in patients with neurological and psychiatric disorders. It is unclear, however, how such patients' cognitive dysfunction is related to their P300 abnormality. Further basic knowledge regarding neural substrates for P300 generation is required for gaining an understanding of the pathological significance of the P300 amplitude reduction. To determine the brain structures involved in P300 generation, we observed the event-related potential and the regional cerebral blood flow (rCBF) in 10 normal subjects performing an oddball discrimination of pure tones. The rCBF value was assessed quantitatively with the aid of single photon emission computed tomography using technetium-99m hexamethylpropylene amine oxime. During the task performance, significant activation was observed in the posterior superior temporal and inferior parietal regions of the right hemisphere. In addition, positive correlation of the task-related increase in rCBF with the simultaneously recorded P300 amplitude was observed in the right but not the left posterior superior temporal region. These findings indicate that activation of the right non-verbal auditory area might modulate P300 generation during pure-tone discrimination.
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Affiliation(s)
- M Higashima
- Department of Neuropsychiatry, School of Medicine, Kanazawa University, Japan
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45
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Hayashi K, Urata K, Munakata Y, Kawasaki S, Makuuchi M. Laparoscopic closure for perforation of the sigmoid colon by endoscopic linear stapler. Surg Laparosc Endosc Percutan Tech 1996; 6:411-3. [PMID: 8890432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Immediate open surgery has been recommended for the management of perforation during colonoscopic examination. Laparoscopic closure for perforation of the sigmoid colon caused by diagnostic colonoscopy is described. The perforation site was identified in the antimesenteric border of the sigmoid colon by laparoscopic survey, and four ports were inserted in the lower abdomen. The margin of the perforation was lifted by two graspers, and the defect was completely closed using an endoscopic linear stapler. The patient recovered quickly without any associated complications. Postoperative barium enema showed no stenosis or leakage. This method is less invasive and allows earlier recovery of patients with colonic perforation.
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Affiliation(s)
- K Hayashi
- First Department of Surgery, Shinshu University, Nagano, Japan
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46
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Urata K, Uehara S, Hayashi H, Matsumata T, Takenaka K, Sugimachi K. Radiofrequency hyperthermia for malignant liver tumors: the clinical results of seven patients. Hepatogastroenterology 1995; 42:492-6. [PMID: 8751203] [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: 02/02/2023]
Abstract
BACKGROUND/AIMS Since 1991, we have performed radiofrequency hyperthermia combined with chemotherapy preliminarily for malignant liver tumors. MATERIALS AND METHODS We were using the BSD-1000 Annular phased array system and monitored intratumoral, skin superficial and intrarectal temperature. The subjects consisted of five patients with hepatocellular carcinoma and two with metastatic liver cancer. All seven patients received therapy from once to five times, with a mean frequency of 3.3 +/- 1.3 (S.D) times. RESULTS The maximum intratumoral temperature was 42.2 +/- 1.0 (S.D.) degrees of centigrade, the length that intratumoral temperature reached 41 degrees of centigrade was 17.1 +/- 6.9 (S.D.) minutes and the length that intratumoral temperature kept above 41 degrees of centigrade was 30.8 +/- 7.5 (S.D.) minutes. The skin superficial and intrarectal temperature were 39.3 +/- 1.1 (S.D.) degrees of centigrade, 40.3 +/- 1.8 (S.D.) degrees of centigrade, respectively. The most common complaints were nausea (28%) and dyspnea (14%). CONCLUSIONS No severe side effects were observed, although one case experienced an abdominal skin burn. We thus found that it was possible to heat deepseated liver tumors safely.
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Affiliation(s)
- K Urata
- Department of Surgery II, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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47
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Urata K, Kawasaki S, Matsunami H, Hashikura Y, Ikegami T, Ishizone S, Momose Y, Komiyama A, Makuuchi M. Calculation of child and adult standard liver volume for liver transplantation. Hepatology 1995. [PMID: 7737637 DOI: 10.1002/hep.1840210515] [Citation(s) in RCA: 671] [Impact Index Per Article: 23.1] [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: 12/11/2022]
Abstract
Despite refinements in surgical techniques for liver transplantation, liver size disparity remains one of the most common problems in pediatric patients. Optimal liver graft size remains unknown and the volume of diseased liver in the recipient is not indicative of the volume (standard liver volume [LV]) optimal for the recipient's metabolic demands. To establish a formula for calculating the standard LV in the pediatric and adult populations for liver transplantation, whole LVs were measured using computed tomography (CT) in 96 patients (65 pediatric and 31 adolescent or adult subjects) with normal liver whose disease conditions did not seem to affect body weight (BW) or LV. In the 96 subjects, the ratio of estimated LV to BW decreased gradually as age increased until approximately 16 years, when it started to level off. On the other hand, there seemed to be a directly proportional relationship between the estimated LV in vivo and body surface area (BSA) (r = .981; r2 = .962; P < .0001) in the subjects as a whole, and the formula, LV (mL) = 706.2 x BSA (m2) + 2.4, was established from the measured data by simple regression analysis. Another predicting equation, LV (mL) = 2.223 x BW (kg)0.426 x body height (BH) (cm)0.682, was produced by multiple regression analysis (r2 = .969; P < .0001). Considering its simplicity of use, we adopted the first formula for predicting standard LV in an individual patient.
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Affiliation(s)
- K Urata
- First Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan
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Hiraishi A, Urata K, Satoh T. A new genus of marine budding phototrophic bacteria, Rhodobium gen. nov., which includes Rhodobium orientis sp. nov. and Rhodobium marinum comb. nov. Int J Syst Bacteriol 1995; 45:226-34. [PMID: 7537056 DOI: 10.1099/00207713-45-2-226] [Citation(s) in RCA: 60] [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] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Strains of a previously undescribed species of purple nonsulfur phototrophic bacteria were isolated from coastal seawater in Japan. These new isolates were gram-negative, motile, budding rods that contained lamellar intracytoplasmic membranes and produced pink to red cultures. Cell extracts of photosynthetic cultures exhibited absorption maxima at 377, 468, 500, 530, 591, 802, and 870 nm, indicating that bacterio-chlorophyll a and carotenoids of the spirilloxanthin series were present. The new isolates were halophilic, facultatively aerobic photoheterotrophs that grew anaerobically in the light or aerobically in the dark. Maximum growth occurred in the presence of 4 to 5% NaCl. Anaerobic growth in the dark with nitrate as a terminal electron acceptor also occurred. Various organic compounds were used as photosynthetic electron donors and carbon sources. Sulfate was used as a sulfur source. Both menaquinone 10 and ubiquinone 10 were produced; these quinones were the major quinones. A phylogenetic analysis based on 16S rRNA gene sequences revealed that strain MB312T (T = type strain), a representative of the new phototrophs, was a member of a lineage that was distinct from members of the genus Rhodopseudomonas; Rhodopseudomonas marina was the closest relative. On the basis of the data described above, we propose the name Rhodobium orientis gen. nov., sp. nov. for the new isolates. We also propose that Rhodopseudomonas marina Imhoff 1983 should be transferred to the genus Rhodobium as Rhodobium marinum comb. nov.
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Affiliation(s)
- A Hiraishi
- Laboratory of Environmental Biotechnology, Konishi Co., Tokyo, Japan
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49
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Matsunami H, Makuuchi M, Kawasaki S, Hashikura Y, Ikegami T, Nakazawa Y, Noike T, Urata K, Kawarasaki H, Iwanaka T. Venous reconstruction using three recipient hepatic veins in living related liver transplantation. Transplantation 1995; 59:917-9. [PMID: 7701594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- H Matsunami
- First Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan
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50
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Kawasaki S, Makuuchi M, Matsushita K, Urata K, Nakazawa Y, Ikegami T, Hashikura Y, Matsunami H, Miyagawa S. The arterial ketone body ratio in living-related donors. Transplantation 1994; 58:1412-4. [PMID: 7809936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- S Kawasaki
- First Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan
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