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Sakai C, Matsuyama M, Nakajima M, Matsumura S, Nonaka M, Arai N, Kuramoto K, Yoshida K, Morishima Y, Muratani M, Hizawa N. Blood eosinophil phenotype during treatment with mepolizumab in patients with severe eosinophilic asthma. Allergol Int 2024:S1323-8930(24)00043-1. [PMID: 38582716 DOI: 10.1016/j.alit.2024.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 02/19/2024] [Accepted: 02/27/2024] [Indexed: 04/08/2024] Open
Affiliation(s)
- Chio Sakai
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Masashi Matsuyama
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan.
| | - Masayuki Nakajima
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Sosuke Matsumura
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Mizu Nonaka
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Naoki Arai
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Kenya Kuramoto
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Kazufumi Yoshida
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Yuko Morishima
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Masafumi Muratani
- Department of Genome Biology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Nobuyuki Hizawa
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
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Nakajima M, Morishima Y, Mori K, Yoshida K, Kuramoto K, Matsuyama M, Kiwamoto T, Matsuno Y, Hizawa N. Hereditary Hemorrhagic Telangiectasia with Diffuse Bronchopulmonary Arteriovenous Malformations. Am J Respir Crit Care Med 2023; 208:726-727. [PMID: 37315322 DOI: 10.1164/rccm.202301-0062im] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 06/14/2023] [Indexed: 06/16/2023] Open
Affiliation(s)
| | | | - Kensaku Mori
- Department of Radiology, Institute of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
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Yoshida K, Morishima Y, Ano S, Sakurai H, Kuramoto K, Tsunoda Y, Yazaki K, Nakajima M, Sherpa MT, Matsuyama M, Kiwamoto T, Matsuno Y, Ishii Y, Hayashi A, Matsuzaka T, Shimano H, Hizawa N. ELOVL6 deficiency aggravates allergic airway inflammation through the ceramide-S1P pathway in mice. J Allergy Clin Immunol 2022; 151:1067-1080.e9. [PMID: 36592705 DOI: 10.1016/j.jaci.2022.12.808] [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: 11/24/2021] [Revised: 11/30/2022] [Accepted: 12/06/2022] [Indexed: 12/31/2022]
Abstract
BACKGROUND Elongation of very-long-chain fatty acids protein 6 (ELOVL6), an enzyme regulating elongation of saturated and monounsaturated fatty acids with C12 to C16 to those with C18, has been recently indicated to affect various immune and inflammatory responses; however, the precise process by which ELOVL6-related lipid dysregulation affects allergic airway inflammation is unclear. OBJECTIVES This study sought to evaluate the biological roles of ELOVL6 in allergic airway responses and investigate whether regulating lipid composition in the airways could be an alternative treatment for asthma. METHODS Expressions of ELOVL6 and other isoforms were examined in the airways of patients who are severely asthmatic and in mouse models of asthma. Wild-type and ELOVL6-deficient (Elovl6-/-) mice were analyzed for ovalbumin-induced, and also for house dust mite-induced, allergic airway inflammation by cell biological and biochemical approaches. RESULTS ELOVL6 expression was downregulated in the bronchial epithelium of patients who are severely asthmatic compared with controls. In asthmatic mice, ELOVL6 deficiency led to enhanced airway inflammation in which lymphocyte egress from lymph nodes was increased, and both type 2 and non-type 2 immune responses were upregulated. Lipidomic profiling revealed that the levels of palmitic acid, ceramides, and sphingosine-1-phosphate were higher in the lungs of ovalbumin-immunized Elovl6-/- mice compared with those of wild-type mice, while the aggravated airway inflammation was ameliorated by treatment with fumonisin B1 or DL-threo-dihydrosphingosine, inhibitors of ceramide synthase and sphingosine kinase, respectively. CONCLUSIONS This study illustrates a crucial role for ELOVL6 in controlling allergic airway inflammation via regulation of fatty acid composition and ceramide-sphingosine-1-phosphate biosynthesis and indicates that ELOVL6 may be a novel therapeutic target for asthma.
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Affiliation(s)
- Kazufumi Yoshida
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Yuko Morishima
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan.
| | - Satoshi Ano
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan; Department of Respiratory Medicine, National Hospital Organization Kasumigaura Medical Center, Tsuchiura, Ibaraki, Japan
| | - Hirofumi Sakurai
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Kenya Kuramoto
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Yoshiya Tsunoda
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Kai Yazaki
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Masayuki Nakajima
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Mingma Thering Sherpa
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Masashi Matsuyama
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Takumi Kiwamoto
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Yosuke Matsuno
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Yukio Ishii
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Akio Hayashi
- Exploratory Research Laboratories, Minase Research Institute, Ono Pharmaceutical Co Ltd, Mishima, Osaka, Japan; AMED-CREST, Japan Agency for Medical Research and Development (AMED), Chiyoda, Tokyo, Japan
| | - Takashi Matsuzaka
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan; AMED-CREST, Japan Agency for Medical Research and Development (AMED), Chiyoda, Tokyo, Japan
| | - Hitoshi Shimano
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan; AMED-CREST, Japan Agency for Medical Research and Development (AMED), Chiyoda, Tokyo, Japan
| | - Nobuyuki Hizawa
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
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Kuramoto K, Matsuyama M, Nonaka M, Takeishi T, Oshima H, Matsumura S, Nakajima M, Sakai C, Shiozawa T, Kiwamoto T, Tsukahara Y, Takayashiki N, Ogawa R, Morishima Y, Noguchi M, Hizawa N. Negative-pressure pulmonary Hemorrhaging Due to Severe Obstructive Sleep Apnea. Intern Med 2021; 60:2291-2296. [PMID: 33612674 PMCID: PMC8355386 DOI: 10.2169/internalmedicine.6206-20] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A 24-year-old man with a history of bloody sputum for 6 months was referred to our hospital with suspected alveolar hemorrhaging due to vasculitis. Chest computed tomography showed ground-glass opacities in both lungs, and an examination of his bronchoalveolar lavage fluid showed alveolar hemorrhaging. However, no evidence of vasculitis was found, and subsequent polysomnographic testing confirmed that he had severe obstructive sleep apnea (OSA). Since the alveolar hemorrhaging improved after the initiation of continuous positive airway pressure treatment, the diagnosis was negative-pressure alveolar hemorrhaging due to severe OSA.
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Affiliation(s)
- Kenya Kuramoto
- Department of Respiratory Medicine, Institute of Clinical Medicine, University of Tsukuba, Japan
| | - Masashi Matsuyama
- Department of Respiratory Medicine, Institute of Clinical Medicine, University of Tsukuba, Japan
| | - Mizu Nonaka
- Department of Respiratory Medicine, Institute of Clinical Medicine, University of Tsukuba, Japan
| | - Takahiro Takeishi
- Department of Respiratory Medicine, Institute of Clinical Medicine, University of Tsukuba, Japan
| | - Hisayuki Oshima
- Department of Respiratory Medicine, Institute of Clinical Medicine, University of Tsukuba, Japan
| | - Sosuke Matsumura
- Department of Respiratory Medicine, Institute of Clinical Medicine, University of Tsukuba, Japan
| | - Masayuki Nakajima
- Department of Respiratory Medicine, Institute of Clinical Medicine, University of Tsukuba, Japan
| | - Chio Sakai
- Department of Respiratory Medicine, Institute of Clinical Medicine, University of Tsukuba, Japan
| | - Toshihiro Shiozawa
- Department of Respiratory Medicine, Institute of Clinical Medicine, University of Tsukuba, Japan
| | - Takumi Kiwamoto
- Department of Respiratory Medicine, Institute of Clinical Medicine, University of Tsukuba, Japan
| | | | - Norio Takayashiki
- Department of Pathology, Faculty of Medicine, University of Tsukuba, Japan
| | - Ryoko Ogawa
- Department of Respiratory Medicine, Institute of Clinical Medicine, University of Tsukuba, Japan
| | - Yuko Morishima
- Department of Respiratory Medicine, Institute of Clinical Medicine, University of Tsukuba, Japan
| | - Masayuki Noguchi
- Department of Pathology, Faculty of Medicine, University of Tsukuba, Japan
| | - Nobuyuki Hizawa
- Department of Respiratory Medicine, Institute of Clinical Medicine, University of Tsukuba, Japan
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Tachi H, Nishino K, Nakaizumi T, Kuramoto K, Shimizu K, Yamamoto Y, Kobayashi K, Ichimura H, Sakata A, Nawa T. A case of ROS1-rearranged lung adenocarcinoma exhibiting pleural effusion caused by crizotinib. Thorac Cancer 2020; 11:2063-2066. [PMID: 32433811 PMCID: PMC7327693 DOI: 10.1111/1759-7714.13496] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 04/30/2020] [Accepted: 05/02/2020] [Indexed: 11/30/2022] Open
Abstract
Reports of crizotinib‐induced pleural effusion in non‐small cell lung cancer (NSCLC) are limited. A 35‐year‐old Japanese woman was diagnosed with ROS1‐rearranged lung adenocarcinoma (primary left lower lobe, cT4N3M1c). Crizotinib was administered as first‐line therapy, and the primary and mediastinal hilar lymph node metastases rapidly shrank. On the fourth day of treatment, chest X‐ray demonstrated contralateral pleural effusion. On the 41st day of treatment, crizotinib was discontinued because of grade 3 neutropenia. Examination including surgical thoracoscopy did not reveal causative findings, and the continued cessation of drug administration enabled the right pleural effusion to decrease gradually and disappear, suggesting that this event was a side effect of crizotinib. The disease did not progress even though the drug was withdrawn for more than one year. In conclusion, crizotinib was considered to cause pleural effusion as an adverse event in a case of ROS1‐rearranged lung adenocarcinoma with a complete response.
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Affiliation(s)
- Hiroaki Tachi
- Department of Respiratory Medicine, Hitachi General Hospital, Hitachi Ltd., Hitachi City, Japan
| | - Kengo Nishino
- Department of Respiratory Medicine, Hitachi General Hospital, Hitachi Ltd., Hitachi City, Japan
| | - Taisuke Nakaizumi
- Department of Respiratory Medicine, Hitachi General Hospital, Hitachi Ltd., Hitachi City, Japan
| | - Kenya Kuramoto
- Department of Respiratory Medicine, Hitachi General Hospital, Hitachi Ltd., Hitachi City, Japan
| | - Kei Shimizu
- Department of Respiratory Medicine, Hitachi General Hospital, Hitachi Ltd., Hitachi City, Japan
| | - Yusuke Yamamoto
- Department of Respiratory Medicine, Hitachi General Hospital, Hitachi Ltd., Hitachi City, Japan
| | - Keisuke Kobayashi
- Department of Thoracic Surgery, Hitachi General Hospital, Hitachi Ltd., Hitachi City, Japan
| | - Hideo Ichimura
- Department of Thoracic Surgery, Hitachi General Hospital, Hitachi Ltd., Hitachi City, Japan
| | - Akiko Sakata
- Department of Pathology, Hitachi General Hospital, Hitachi Ltd., Hitachi City, Japan
| | - Takeshi Nawa
- Department of Respiratory Medicine, Hitachi General Hospital, Hitachi Ltd., Hitachi City, Japan
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Kuramoto K, Beppu T, Irie K, Kinoshita K, Sato N, Akahoshi S, Yoshida Y, Yuki H, Hamada Y. Hepatobiliary and Pancreatic: Intra-ductal biliary schwannoma. J Gastroenterol Hepatol 2019; 34:1674. [PMID: 31210364 DOI: 10.1111/jgh.14679] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Accepted: 03/30/2019] [Indexed: 12/09/2022]
Affiliation(s)
- K Kuramoto
- Department of Surgery, Yamaga City Medical Center, Yamaga, Japan
| | - T Beppu
- Department of Surgery, Yamaga City Medical Center, Yamaga, Japan
| | - K Irie
- Department of Surgery, Yamaga City Medical Center, Yamaga, Japan
| | - K Kinoshita
- Department of Surgery, Yamaga City Medical Center, Yamaga, Japan
| | - N Sato
- Department of Surgery, Yamaga City Medical Center, Yamaga, Japan
| | - S Akahoshi
- Department of Surgery, Yamaga City Medical Center, Yamaga, Japan
| | - Y Yoshida
- Department of Surgery, Yamaga City Medical Center, Yamaga, Japan
| | - H Yuki
- Department of Radiology, Yamaga City Medical Center, Yamaga, Japan
| | - Y Hamada
- Department of Pathology, Fukuoka University, Fukuoka, Japan
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Abu-Zayyad T, Aida R, Allen M, Anderson R, Azuma R, Barcikowski E, Belz JW, Bergman DR, Blake SA, Cady R, Cheon BG, Chiba J, Chikawa M, Cho EJ, Cho WR, Fujii H, Fujii T, Fukuda T, Fukushima M, Gorbunov D, Hanlon W, Hayashi K, Hayashi Y, Hayashida N, Hibino K, Hiyama K, Honda K, Iguchi T, Ikeda D, Ikuta K, Inoue N, Ishii T, Ishimori R, Ivanov D, Iwamoto S, Jui CCH, Kadota K, Kakimoto F, Kalashev O, Kanbe T, Kasahara K, Kawai H, Kawakami S, Kawana S, Kido E, Kim HB, Kim HK, Kim JH, Kim JH, Kitamoto K, Kitamura S, Kitamura Y, Kobayashi K, Kobayashi Y, Kondo Y, Kuramoto K, Kuzmin V, Kwon YJ, Lan J, Lim SI, Machida S, Martens K, Matsuda T, Matsuura T, Matsuyama T, Matthews JN, Minamino M, Miyata K, Murano Y, Myers I, Nagasawa K, Nagataki S, Nakamura T, Nam SW, Nonaka T, Ogio S, Ohnishi M, Ohoka H, Oki K, Oku D, Okuda T, Oshima A, Ozawa S, Park IH, Pshirkov MS, Rodriguez DC, Roh SY, Rubtsov GI, Ryu D, Sagawa H, Sakurai N, Sampson AL, Scott LM, Shah PD, Shibata F, Shibata T, Shimodaira H, Shin BK, Shin JI, Shirahama T, Smith JD, Sokolsky P, Stokes BT, Stratton SR, Stroman T, Suzuki S, Takahashi Y, Takeda M, Taketa A, Takita M, Tameda Y, Tanaka H, Tanaka K, Tanaka M, Thomas SB, Thomson GB, Tinyakov P, Tkachev I, Tokuno H, Tomida T, Troitsky S, Tsunesada Y, Tsutsumi K, Tsuyuguchi Y, Uchihori Y, Udo S, Ukai H, Vasiloff G, Wada Y, Wong T, Wood M, Yamakawa Y, Yamane R, Yamaoka H, Yamazaki K, Yang J, Yoneda Y, Yoshida S, Yoshii H, Zhou X, Zollinger R, Zundel Z. Upper limit on the flux of photons with energies above1019 eVusing the Telescope Array surface detector. Int J Clin Exp Med 2013. [DOI: 10.1103/physrevd.88.112005] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Hamaguchi D, Yoshida S, Kuramoto K, Yoshizaki Y, Fujishima M, Onozawa S, Ookawa K. A Retrospective Analysis of 76 Patients with Malignancy who Were Referred to Department of Home Care Medicine. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt459.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ehara M, Kuramoto K, Nakatsuji H, Hoshino M, Tanaka T, Kitajima M, Tanaka H, De Fanis A, Tamenori Y, Ueda K. C1s and O1s photoelectron satellite spectra of CO with symmetry-dependent vibrational excitations. J Chem Phys 2006; 125:114304. [PMID: 16999471 DOI: 10.1063/1.2346683] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The photoelectron shake-up satellite spectra that accompany the C1s and O1s main lines of carbon monoxide have been studied by a combination of high-resolution x-ray photoelectron spectroscopy and accurate ab initio calculations. The symmetry-adapted cluster-expansion configuration-interaction general-R method satisfactorily reproduces the satellite spectra over a wide energy region, and the quantitative assignments are proposed for the 16 and 12 satellite bands for C1s and O1s spectra, respectively. Satellite peaks above the pi(-1)pi(*) transitions are mainly assigned to the Rydberg excitations accompanying the inner-shell ionization. Many shake-up states, which interact strongly with three-electron processes such as pi(-2)pi(*2) and n(-2)pi(*2), are calculated in the low-energy region, while the continuous Rydberg excitations are obtained with small intensities in the higher-energy region. The vibrational structures of low-lying shake-up states have been examined for both C1s and O1s ionizations. The vibrational structures appear in the low-lying C1s satellite states, and the symmetry-dependent angular distributions for the satellite emission have enabled the Sigma and Pi symmetries to be resolved. On the other hand, the potential curves of the low-lying O1s shake-up states are predicted to be weakly bound or repulsive.
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Affiliation(s)
- M Ehara
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan.
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Matsumoto M, Ueda K, Kukk E, Yoshida H, Tanaka T, Kitajima M, Tanaka H, Tamenori Y, Kuramoto K, Ehara M, Nakatsuji H. Vibrationally resolved C and O 1s photoelectron spectra of carbon monoxides. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2005.09.094] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hosoda K, Kuramoto K, Eruden B, Nishida T, Shioya S. The Effects of Three Herbs as Feed Supplements on Blood Metabolites, Hormones, Antioxidant Activity, IgG Concentration, and Ruminal Fermentation in Holstein Steers. Asian Australas J Anim Sci 2005. [DOI: 10.5713/ajas.2006.35] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Hosokai S, Hayashi JI, Shimada T, Kobayashi Y, Kuramoto K, Li CZ, Chiba T. Spontaneous Generation of Tar Decomposition Promoter in a Biomass Steam Reformer. Chem Eng Res Des 2005. [DOI: 10.1205/cherd.04101] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Mori A, Ohtsuki C, Miyazaki T, Sugino A, Tanihara M, Kuramoto K, Osaka A. Synthesis of bioactive PMMA bone cement via modification with methacryloxypropyltri-methoxysilane and calcium acetate. J Mater Sci Mater Med 2005; 16:713-8. [PMID: 15965740 DOI: 10.1007/s10856-005-2607-4] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2003] [Accepted: 10/14/2004] [Indexed: 05/03/2023]
Abstract
Bone cement consisting of polymethylmethacrylate (PMMA) powder and methylmethacrylate (MMA) liquid is clinically used for fixation of implants such as artificial hip joints. However, it does not show bone-bonding ability, i.e., bioactivity. The lack of bioactivity would be one of factors which cause loosening between the cement and the implant. The present authors recently showed the potential of bioactive PMMA-based bone cement through modification with gamma-methacryloxypropyltrimethoxysilane (MPS) and calcium acetate. In this study, the effects of the kinds of PMMA powder on setting time, apatite formation and compressive strength were investigated in a simulated body fluid (Kokubo solution). The cement modified with calcium acetate calcined at 220 degrees C could set within 15 min when the PMMA powder had an average molecular weight of 100,000 or less. The addition of calcium acetate calcined at 120 degrees C in the PMMA powder required a much longer period for setting. The modified cements formed an apatite layer after soaking in the Kokubo solution within 1 day for cement starting from PMMA powder with a molecular weight of 100,000 or less. Compressive strengths of the modified cements were more than 70 MPa for cements starting from 100,000 and 56,000 in molecular weight. After soaking in Kokubo solution for 7 days, the modified cement consisting of PMMA powder of 100,000 in molecular weight showed a smaller decrease in compressive strength than that consisting of 56,000 in molecular weight. These results indicate that bioactive PMMA cement can be produced with appropriate setting time and mechanical strength when PMMA powders with a suitable molecular weight are used. Such a type of design of bioactive PMMA bone cement leads to a novel development of bioactive material for bone substitutes.
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Affiliation(s)
- A Mori
- Nakashima Medical Division, Nakashima Propeller Co., Ltd., 688-1, Jodo-Kitagata, Okayama, 700-8691, Japan
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Kuramoto K, Ban S, Oda K, Tanaka H, Kimura A, Suzuki G. Chromosomal instability and radiosensitivity in myelodysplastic syndrome cells. Leukemia 2002; 16:2253-8. [PMID: 12399970 DOI: 10.1038/sj.leu.2402703] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2002] [Accepted: 06/20/2002] [Indexed: 11/08/2022]
Abstract
Myelodysplastic syndrome (MDS) is a clonal disorder of hematopoietic stem cells. To investigate whether chromosomal instability and/or DNA repair defects are involved in the development of MDS, we measured the micronucleus (MN) frequency in peripheral blood lymphocytes exposed to various doses of X-rays, using a cytokinesis-block micronucleus assay. The spontaneous MN frequencies in RAEB and RAEB-T patients were significantly higher than those in normal individuals (P = 0.0224, P = 0.008, respectively). Also, the X-ray-induced MN frequencies in RA/RARS, RAEB, and RAEB-T patients were significantly higher than those in normal individuals (P = 0.007, P = 0.003, P = 0.003, respectively, at 2 Gy). In order to elucidate the cause of unusual radiosensitivity, we measured the expression levels of nucleotide excision repair (NER) genes in peripheral blood mononuclear cells using a RT-PCR method. Reduction of NER gene expression was found in only one of 10 patients with low risk MDS, but in four of 11 patients with high risk MDS. Our data suggest that chromosomal instability and DNA repair defects may be involved in the pathophysiology of disease progression of MDS.
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Affiliation(s)
- K Kuramoto
- Department of Clinical Studies, Radiation Effects Research Foundation, Hiroshima, Japan
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Herath CB, Watanabe G, Wanzhu J, Noguchi J, Akiyama K, Kuramoto K, Groome NP, Taya K. Elevated levels of inhibin-A and immunoreactive inhibin in aged male Wistar rats with testicular Leydig cell tumor. J Androl 2001; 22:838-46. [PMID: 11545298] [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: 02/21/2023]
Abstract
This study was undertaken to investigate the endocrine changes that occur in male Tig:Wistar rats with Leydig cell tumors, with special reference to immunoreactive inhibin (ir-inhibin) and its dimeric forms. Adult male rats from 2 to 28 months of age were used. Blood samples were taken to measure plasma concentrations of ir-inhibin, inhibin-A, inhibin-B, 17beta-estradiol (E2), testosterone, luteinizing hormone (LH), and follicle-stimulating hormone (FSH). Inhibin bioactivity in both peripheral plasma and testicular extracts was also measured. Rats aged 18 months and older had testicular Leydig cell tumor. Testicular tissue sections from 27-month-old rats examined immunohistochemically showed strong positive staining for all 3 inhibin subunits, in particular inhibin alpha and betaA subunits, in the tumor cells. Plasma concentrations of ir-inhibin began to rise significantly (P < .05) at 18 months of age. High bioactivity of inhibin was detected not only in testicular extracts but also in peripheral plasma of aged rats. Thus, plasma concentrations of bioactive inhibin-A, but not inhibin-B, were significantly elevated with increasing age. The concentrations were significantly higher than those in normal male (P < .01) or normal female (P < .05) rats. Plasma concentrations of E2 were significantly (P < .05) elevated only at 23-24 months of age. A marked reduction (P < .05 to .001) in plasma LH and FSH concentrations was observed at 18 months of age and older. Plasma concentrations of testosterone were highest at 2 months of age and then decreased gradually and significantly (P < .05 to .001) afterward. Significant (P < .05 to .001) positive (testosterone vs LH) and negative (ir-inhibin vs FSH, ir-inhibin vs LH, and E2 vs FSH) correlations were observed. It is suggested that plasma inhibin-A levels are elevated in male Tig:Wistar rats with Leydig cell tumor, and thus inhibin-A may be used as a specific marker of testicular Leydig cell tumors. The present results also suggest that the age-related decline in plasma gonadotropins and thus testosterone levels in Tig:Wistar rats may be due to the development of tumors of the Leydig cells rather than to aging per se.
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Affiliation(s)
- C B Herath
- Laboratory of Veterinary Physiology, Tokyo University of Agriculture and Technology, Fuchu, Japan
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16
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Kuwajima I, Kuramoto K, Ogihara T, Iimura O, Abe K, Saruta T, Ishii M, Hiwada K, Fujishima M, Fukiyama K. Tolerability and safety of a calcium channel blocker in comparison with a diuretic in the treatment of elderly patients with hypertension: secondary analysis of the NICS-EH. Hypertens Res 2001; 24:475-80. [PMID: 11675939 DOI: 10.1291/hypres.24.475] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A randomized prospective controlled study, the National Interventional Cooperative Study in Elderly Hypertensives (NICS-EH), previously demonstrated that the preventive effect of the long-acting calcium channel blocker nicardipine on the cardiovascular endpoint was similar to that of the diuretic, trichlormethiazide. The present report is a sub-analysis in which we compare the tolerability and safety of the calcium channel blocker with that of a diuretic in the long-term treatment of elderly hypertensives. A total of 429 elderly patients with hypertension were assigned to the nicardipine group or the diuretic group by the double-dummy method and were followed up for 5 years. Two hundred four patients in the nicardipine group and 210 patients in the diuretic group were analyzed. The incidences of fatal and nonfatal cardiovascular (CV) events in the two groups were comparable, and there was no significant difference in the cumulative event-free rate. However, the total incidence of adverse reactions, including non-CV events and unfavorable BP changes, was 31 cases (15.2%) in the nicardipine group, which was significantly lower than the 47 cases (22.4%) in the diuretic group (log-rank: p=0.026, G. Wilcoxon: p=0.01). The total number of medical endpoints, including CV events, the withdrawal of the patient from the study, was 52 (25.5%) in the nicardipine group, which was significantly lower than the 65 (31.0%) in the diuretic group (log-rank: p=0.078, G. Wilcoxon: p=0.044). It was concluded that sustained-release nicardipine is better tolerated, as it exhibits a lower incidence of medical-related withdrawals such as adverse drug reactions, non-cardiovascular events and unfavorable BP responses during the treatment.
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Affiliation(s)
- I Kuwajima
- Division of Cardiology, Tokyo Metropolitan Geriatric Hospital, Japan.
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17
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Nitani N, Kuramoto K, Yamashita T, Ohmichi T. Evaluation on chemical state of irradiated rock-like oxide fuels by nuclear and chemical modeling. Progress in Nuclear Energy 2001. [DOI: 10.1016/s0149-1970(00)00153-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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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18
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Kuramoto K, Yamashita T, Shiratori T. Post-irradiation examination of uranium-doped rock-like oxide fuels. Progress in Nuclear Energy 2001. [DOI: 10.1016/s0149-1970(00)00150-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Serizawa H, Nakajima K, Arai Y, Yamashita T, Kuramoto K, Kinoshita H, Yamanaka S, Uno M, Kurosaki K. Re-evaluation of the phase relationship between plutonium and zirconium dioxides. Progress in Nuclear Energy 2001. [DOI: 10.1016/s0149-1970(00)00107-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Sakai A, Katayama Y, Mizuno A, Kuramoto K, Takimoto Y, Fujimoto H, Sasaki N, Kimura A. [MALT lymphoma producing IgG-kappa type M-protein]. Rinsho Ketsueki 2000; 41:658-63. [PMID: 11020994] [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: 02/17/2023]
Abstract
A 72-year-old woman, who has been administered prednisolone and azathioprine with diagnoses of idiopathic thrombocytopenic purpura (ITP) and autoimmune hepatitis (AIH), underwent a complete medical examination because of monoclonal gammopathy (IgG-kappa). Tumors were found in the ileum and descending colon. Pathological examination of biopsy specimens suggested a diagnosis of marginal zone B-cell lymphoma of the MALT type with a high-grade component. Flow cytometric analysis by two-color staining revealed that the neoplastic B cells expressed CD38, CD19, IgG and kappa, but not CD5 or CD10. There were no abnormal plasma cells in bone marrow smears. The patient achieved complete remission after receiving three cycles of THP-COP chemotherapy, which resulted in a decrease of the IgG level to within the normal range. These findings indicated that monoclonal IgG-kappa might be produced by lymphoma cells. However, the relationship of the immunosuppressive agents to the pathogenesis of the MALT lymphoma remains to be clarified.
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Affiliation(s)
- A Sakai
- Department of Hematology and Oncology, Hiroshima University
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21
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Witt D, Kuramoto K, Kemper M, Holland P. Utility of prospective study of donors deferred as HTLV indeterminate. Vox Sang 2000; 78:130-1. [PMID: 10765152 DOI: 10.1159/000031165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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22
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Shumiya S, Kuramoto K, Itoh H, Kaneko M. Establishment and characteristics of four sub-strains of F344 rats reared on various low protein and low energy diets. Exp Anim 2000; 49:153-61. [PMID: 11109537 DOI: 10.1538/expanim.49.153] [Citation(s) in RCA: 3] [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] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Four sub-strains, reared by sib-mating and having for their origin the F344/DuCrj strain of rats, were established by feeding with different levels of low protein and low energy diets, and their characteristics investigated. The amounts of crude protein (CP) and digestible energy (DE) in the four diets were 17.6%-3.0 kcal, 10.5%-2.5 kcal, 8.4%-2.0 kcal, and 10.5%-2.5 kcal, respectively, and the four sub-strains established here were provisionally designated as F344/Tig1, F344/Tig2, F344/Tig3 and F344/Tig4, respectively. Intakes of nitrogen-corrected metabolizable energy (MEn) did not differ, and a large intake of digestible crude protein (DCP) was observed in F344/Tig1 rats. The body weight of rats provided with lower-nutrient diets showed a tendency to decrease until the F2 generation, but no change among the generations was seen subsequently, and the same compiled differences in protein content were maintained. Similar transitions were observed in the lifetime rearing test. Though F344/Tig3 rats, which were reared on minimum nutrients, showed a tendency to delayed puberty, we were easily able to breed four pairs in every generation using procedures similar to those used for other strains of rats. There were no differences among the F344/Tig1 to -3 strains of rats in body length, digestive tract length, or organ weight per body weight, and all the rats had a normal range of biochemical values. But the F344/Tig4 showed a high glutamic-oxaloacetic transaminase (GOT), and a tendency to decreased liver function and a shorter lifespan. These sub-strains of F344 rats clarified differences in fatty acid compositions, such as docosahexaenoic acid (DHA) in serum, liver and the brain. The rats were intended to be useful animal models for the study of nutritional environments and their influence on the memory and learning.
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Affiliation(s)
- S Shumiya
- Department of Laboratory Animal Science, Tokyo Metropolitan Institute of Gerontology, Japan
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23
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Mori K, Saida Y, Kuramoto K, Anno I, Yoshioka H, Irie T, Itai Y. Transcatheter embolization of mycotic aneurysm of the subclavian artery with metallic coils. J Cardiovasc Surg (Torino) 2000; 41:463-7. [PMID: 10952342] [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: 02/17/2023]
Abstract
Mycotic aneurysms of the subclavian artery are rare. This report describes an experience of 2 rare cases in which transcatheter embolization with metallic coils was performed for the management of these lesions alternative to surgery. Two patients who had been treated with chemotherapy for malignant neoplasms were diagnosed as having mycotic aneurysms of the left subclavian artery. The causes of these lesions were presumed to be the invasion of the arterial wall by the pulmonary abscess in case 1, and wound infection after placement of the reservoir for intraarterial chemotherapy in case 2. In both cases, proximal and distal sites of the aneurysm were embolized with metallic coils. In case 1, the vertebral artery was also embolized with Guglielmi detachable coils to avoid retrograde blood flow. Both aneurysms were completely occluded by a single embolization. In case 1, although weakness and paresthesia of the left hand remained, lethal hemoptysis due to aneurysmal fistulization to the lung parenchyma ceased. In case 2, no neurological deficit except for mild paresthesia in the left thumb had been observed. Both patients died of primary disease 10 and 5 months after the procedure. Transcatheter embolization is technically feasible and effective enough to treat the mycotic aneurysm of the subclavian artery even in the situation in which the surgical option seems to be difficult or risky.
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Affiliation(s)
- K Mori
- Department of Radiology, Tsukuba University Hospital, Japan
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24
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Kuramoto K, Uesaka T, Kimura A, Kobayashi M, Watanabe H, Katoh O. ZK7, a novel zinc finger gene, is induced by vascular endothelial growth factor and inhibits apoptotic death in hematopoietic cells. Cancer Res 2000; 60:425-30. [PMID: 10667597] [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: 02/15/2023]
Abstract
Vascular endothelial growth factor (VEGF) inhibits radiation-induced apoptosis in the leukemia cell line, CMK86 (O. Katoh et al., Cancer Res., 55: 5687-5692, 1995). To elucidate the molecular mechanisms underlying this inhibitory effect of VEGF, we attempted to identify a transcription factor involved in the cellular response to VEGF stimulation. We cloned the cDNA of a novel Kruppel-type zinc finger (ZNF) gene, ZK7, from a cDNA library constructed from the human leukemia cell line CMK86 after incubation with VEGF. This cDNA encoded a protein of 289 amino acids, which contained a Kruppel-associated box A-box domain at the NH2 terminus and seven ZNF motifs at the COOH terminus. These ZNF motifs were identical to those of HZF16 (M. Saleh et al., Am. J. Hum. Genet., 52: 192-203, 1993). ZK7 and HZF16 genes appear to be the splice variants transcribed from the same gene. Northern blotting and quantitative reverse transcription-PCR analysis revealed that expression of ZK7 mRNA in CMK86 cells and human hematopoietic progenitor cells was increased after VEGF stimulation, whereas that of HZF16 mRNA remained unchanged. To examine the function of ZK7 protein, we generated clones of a human monocytoid leukemia cell line, U937, which were stably transfected with ZK7 or HZF16 cDNA. Importantly, ZK7-overexpressing cells had lower sensitivity to ionizing radiation and the chemotherapeutic agent etoposide than U937 parent cells or HZF16-overexpressing cells. Therefore, ZK7 protein may be involved in the inhibitory effect of VEGF on apoptotic cell death in human hematopoietic cells.
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Affiliation(s)
- K Kuramoto
- Department of Hematology and Oncology, Research Institute for Radiation Biology and Medicine, Hiroshima University, Japan
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25
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Ogihara T, Kuramoto K. Effect of long-term treatment with antihypertensive drugs on quality of life of elderly patients with hypertension: a double-blind comparative study between a calcium antagonist and a diuretic. NICS-EH Study Group. National Intervention Cooperative Study in Elderly Hypertensives. Hypertens Res 2000; 23:33-7. [PMID: 10737133 DOI: 10.1291/hypres.23.33] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
We investigated the effect of long-term treatment with a calcium antagonist (nicardipine hydrochloride retard tablet) and a diuretic (trichlormethiazide) on quality of life (QOL) in elderly hypertensives in a multicenter, randomized, double-blind, comparative study (National Intervention Cooperative Study in Elderly Hypertensives Study Group). The percentage of patients who experienced side effects was 17.2% in the nicardipine group and 18.1% in the trichlormethiazide group and 2.9% and 4.3% of participants, respectively, withdrew due to those side effects. These results suggested that nicardipine was tolerated slightly better than trichlormethiazide. There were no significant differences between the two groups in terms of total QOL score or in degree of change (delta score) before and after calcium antagonist or diuretic administration. Lower score was seen in 3 categories (general symptoms, sleep scale, and sexual function) in the trichlormethiazide group (p< 0.05) and in one category (cognitive function) in the nicardipine group, but there was no significant difference in delta score in any of the individual items. In conclusion, the two anti-hypertensive agents had nearly equivalent effects on QOL in the long-term treatment of hypertension in the elderly and that neither resulted in a deterioration in QOL.
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Affiliation(s)
- T Ogihara
- National Intervention Cooperative Study in Elderly Study Group, Tokyo, Japan
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26
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Watanabe H, Uesaka T, Kido S, Ishimura Y, Shiraki K, Kuramoto K, Hirata S, Shoji S, Katoh O, Fujimoto N. Gastric tumor induction by 1,2-dimethylhydrazine in Wistar rats with intestinal metaplasia caused by X-irradiation. Jpn J Cancer Res 1999; 90:1207-11. [PMID: 10622530 PMCID: PMC5926017 DOI: 10.1111/j.1349-7006.1999.tb00697.x] [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] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Five-week-old male Wistar rats were X-irradiated with a total of 20 Gy in 2 equal fractions at a 3-day interval. 1,2-Dimethylhydrazine (DMH) solution was injected i.m. into the back musculature at a dose of 20 mg/kg body weight weekly for 10 weeks, beginning 20 weeks after the final irradiation. Twelve months after the initial carcinogen treatment, tumors in the fundus of the glandular stomach were observed in 5 of 23 animals receiving both X-irradiation and DMH treatment. No tumors of the glandular stomach were observed in the DMH and X-ray alone or nontreatment groups. It is concluded that the presence of intestinal metaplasia may increase sensitivity to the induction of gastric tumors by carcinogens like DMH.
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Affiliation(s)
- H Watanabe
- Department of Environment and Mutation, Research Institute for Radiation Biology and Medicine, Hiroshima.
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27
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Watanabe H, Uesaka T, Kido S, Ishimura Y, Shiraki K, Kuramoto K, Hirata S, Shoji S, Katoh O, Fujimoto N. Influence of concomitant miso or NaCl treatment on induction of gastric tumors by N-methyl-N'-nitro-N-nitrosoguanidine in rats. Oncol Rep 1999; 6:989-93. [PMID: 10425292 DOI: 10.3892/or.6.5.989] [Citation(s) in RCA: 3] [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] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Six-week old male Sprague-Dawley (CD) rats were treated with 100 ppm N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) for 16 weeks in their drinking water with control, miso or sodium chloride (NaCl) supplemented diets. All animals were autopsied 12 months after the beginning of the MNNG treatment. Despite higher intake of MNNG in the high dose miso and NaCl groups, the total tumor incidences were decreased compared to middle and lowest values. The glandular stomach adenocarcinoma incidences in the 10% and 5% miso groups were significantly decreased as compared to those in the 2.2% or 1.1% NaCl groups, with the same concentration of NaCl.
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Affiliation(s)
- H Watanabe
- Department of Environment and Mutation, Research Institute for Radiation Biology and Medicine, Hiroshima University, Minami-ku, Hiroshima 734-8553, Japan
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28
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Katoh O, Takahashi T, Oguri T, Kuramoto K, Mihara K, Kobayashi M, Hirata S, Watanabe H. Vascular endothelial growth factor inhibits apoptotic death in hematopoietic cells after exposure to chemotherapeutic drugs by inducing MCL1 acting as an antiapoptotic factor. Cancer Res 1998; 58:5565-9. [PMID: 9850095] [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: 02/09/2023]
Abstract
We reported previously that vascular endothelial growth factor (VEGF) inhibits the apoptotic death of hematopoietic cells that is induced by exposure to ionizing radiation (O. Katoh et al., Cancer Res., 55: 5687-5692, 1995). In this study, we show that VEGF also inhibits apoptotic cell death that is induced by exposure to the chemotherapeutic drugs etoposide and doxorubicin. To elucidate the molecular mechanisms underlying this inhibitory effect of VEGF, we examined expression levels of BCL2 family proteins in CMK86, a human leukemia cell line, after treatment with VEGF. Northern blotting and immunoblotting analyses revealed that the expression level of MCL1, a member of the BCL2 family, was increased by VEGF. Moreover, to examine the effects of MCL1 on apoptotic cell death induced by exposure to etoposide, we generated a clonal U937 myeloid leukemia cell line transfected with vectors that promoted the constitutive expression of MCL1. MCL1 decreased the caspase 3 activity induced by exposure to etoposide and increased the viability of the transfected cells after etoposide exposure. Therefore, MCL1 may be involved in the inhibitory effect of VEGF on apoptotic cell death.
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Affiliation(s)
- O Katoh
- Department of Environment and Mutation, Research Institute for Radiation Biology and Medicine, Hiroshima University, Japan
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29
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Affiliation(s)
- Y Kurosaki
- Department of Radiology, Institute of Clinical Medicine, University of Tsukuba, Ibaraki-ken, Japan
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30
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Oguri T, Katoh O, Takahashi T, Isobe T, Kuramoto K, Hirata S, Yamakido M, Watanabe H. The Krüppel-type zinc finger family gene, HKR1, is induced in lung cancer by exposure to platinum drugs. Gene X 1998; 222:61-7. [PMID: 9813242 DOI: 10.1016/s0378-1119(98)00464-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
To investigate the molecular mechanism associated with the signaling pathway of platinum drug administration, we focused on the C2H2-type zinc finger (ZNF) transcription factor gene family. Here we show cloning of a Krüppel-type ZNF gene, HKR1, which contains Krüppel-associated box (KRAB) domain and ZNF motifs. We found that mRNA expression of the HKR1 gene was induced in lung-cancer cell lines by exposure to cisplatin using Northern blot analysis. Moreover, we also found that HKR1 mRNA expression levels in lung cancers were higher than those in normal lung tissues, and that high expression levels in lung cancers were associated with antemortem platinum drug administration. These results suggest that HKR1 may be associated with the regulation of a signaling pathway involved in the progression of lung cancer or the acquisition of resistance to platinum drugs.
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Affiliation(s)
- T Oguri
- Second Department of Internal Medicine, Hiroshima University School of Medicine, Kasumi 1-2-3, Minami-ku, Hiroshima 734-8551, Japan
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31
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Watanabe H, Ogiu T, Nishizaki M, Fujimoto N, Kido S, Ishimura Y, Shiraki K, Kuramoto K, Hirata S, Shoji S, Katoh O. Induction of ovarian tumors by heavy ion irradiation in B6C3F1 mice. Oncol Rep 1998; 5:1377-80. [PMID: 9769371 DOI: 10.3892/or.5.6.1377] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Six-week-old B6C3F1 mice were exposed to 0.439 Gy heavy ion irradiation as a 290 MeV/u carbon-ion beam (LET 10 keV/micron) at 2 cm from the upper proximal point of a spread Bragg beam and autopsied 13.5 months after the irradiation. In males total tumor incidences, mainly liver tumors, were 37.0% in irradiated group and 25.0% in control (P>0.05). In females the total tumor incidences were 32.3%, mainly ovarian tumors, in the irradiated group and 0% in the controls. These results indicate that heavy ion irradiation induces ovarian tumors in females but does not target any organ in males.
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Affiliation(s)
- H Watanabe
- Department of Environment and Mutation, Research Institute for Radiation Biology and Medicine, Hiroshima University, Minami-ku, Hiroshima 734-8553, Japan
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32
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Ando Y, Uesaka T, Kido S, Fujimoto N, Tatematsu M, Ishimura Y, Shiraki K, Hirata S, Kuramoto K, Shoji S, Katoh O, Watanabe H. No susceptibility of colon tissue implanted into the glandular stomach of rats to N-nitroso-N-methylurea carcinogenesis. Oncol Rep 1998; 5:1373-6. [PMID: 9769370 DOI: 10.3892/or.5.6.1373] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The present study was undertaken to determine the response of colonic mucosa implanted into the stomach fundus in 6-week-old male F344 rats to oral administration of N-nitroso-N-methylurea (MNU). In graft + MNU, 15% animals had tumors in the implanted colon tissue whereas a 26% incidence of gastric tumors was observed for the pyloric mucosa. In MNU alone, 30% of rats demonstrated gastric tumors. In graft alone 10% of tumors were observed in the grafted site but none in the pylorus. Thus while graft tissue may intrinsically have an elevated risk of tumor development, no susceptibility to MNU was observed in the present study.
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Affiliation(s)
- Y Ando
- Department of Environment and Mutation, Hiroshima University, Minami-ku, Hiroshima 734-8553, Japan
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33
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Watanabe H, Fujimoto N, Masaoka Y, Kurosumi M, Oguri T, Takahashi T, Kido S, Hirata S, Kuramoto K, Shoji S, Katoh O. Effects of azoxymethane on X-ray induced intestinal metaplasia in Donryu rats. Oncol Rep 1998; 5:837-40. [PMID: 9625828 DOI: 10.3892/or.5.4.837] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The present study was undertaken to determine the effect of azoxymethane (AOM) administration on intestinal metaplasia induced by X-irradiation in male Donryu rats. Five-week-old animals were X-irradiated with two doses of 10 Gy each at a 3-day interval or three X-ray doses of 10 Gy at a 2-day interval and then received AOM injections i.m. at a dose of 15 mg/kg body weight once weekly for 3 weeks, 6 months after irradiation. Alkaline phosphatase positive foci were decreased after AOM treatments, but aberrant crypt like-foci appeared within areas of intestinal metaplasia. In contrast no induction was observed in normal-appearing gastric mucosa.
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Affiliation(s)
- H Watanabe
- Department of Environment and Mutation, Research Institute for Radiation Biology and Medicine, Hiroshima University, Minami-ku, Hiroshima, 734-8553, Japan
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Abstract
Hepatitis-associated aplastic anemia (HAAA) is an uncommon disorder that usually is not due to hepatitis A or B virus infection. Hepatitis C virus (HCV) seropositivity is infrequently observed in aplastic anemia (AA) patients who have not been extensively transfused. However, HCV seropositivity may not be detected until several weeks or months after viral infection and AA patients may exhibit defective humoral immunity. Therefore, we evaluated sera from AA patients for the presence of HCV viremia using a reverse transcriptase polymerase chain reaction (RT-PCR) based assay and several serologic assays for HCV antibodies. Serum samples from 90 AA patients who presented to the UCLA Medical Center between March 1984 and February 1990 were analyzed. Overall, 17 patients were found to have HCV viremia by RT-PCR assay, of whom 14 had a positive second-generation HCV enzyme immunoassay (EIA-2) and only 6 were EIA-1 reactive. The frequency of HCV viremia increased with the duration of time between diagnosis and sample procurement, and the number of blood products transfused prior to sampling (P = 0.026). No patient who received fewer than 20 U of blood products or who was sampled less than 20 days after diagnosis had a positive HCV RT-PCR result. Of four patients with hepatitis-associated AA (HAAA), one who was sampled 23 days after diagnosis had hepatitis C viremia and a reactive EIA-2 assay. Therefore, the high frequency of HCV viremia in this patient population is most likely due to transfusion with contaminated blood products prior to the introduction of routine blood donor screening for HCV.
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Affiliation(s)
- R L Paquette
- Division of Hematology/Oncology, UCLA School of Medicine, Los Angeles, California 90095-1678, USA
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35
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Kemper M, Witt D, Madsen T, Kuramoto K, Holland P. The effects of dilution on the outcome of pooled plasma testing with HIV type 1 (HIV-1) RNA genome amplification as compared to the outcome of individual-unit testing with other HIV-1 markers. Transfusion 1998; 38:469-72. [PMID: 9633560 DOI: 10.1046/j.1537-2995.1998.38598297216.x] [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] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Proposed testing of large plasma pools with genome amplification technology (GAT) for detection of transfusion-transmissible viruses may have unanticipated complications not associated with individual unit testing. One such potential complication, the effect of dilution resulting from pool formation, was the subject of the present study. STUDY DESIGN AND METHODS Specimens from three plasma donor HIV type 1 (HIV-1) seroconversion panels were tested with a quantitative HIV-1 RNA GAT assay (lower detection limit, 400 copies). GAT results were compared to HIV-1 p24 antigen and anti-HIV-1/2 enzyme immunoassay results. Effects of dilution on the detection of GAT-positive panel specimens were assessed by terminal dilution with pooled volunteer-donor EDTA plasma samples. RESULTS Low HIV-1 RNA copy numbers (755 and 890 copies/0.1-mL input) that were detectable in two individual plasma specimens before HIV-1 p24 antigen were subsequently undetectable by GAT upon dilution with an equal volume of nonreactive plasma from a single donor. HIV-1 RNA at higher copy numbers (15,500 copies/0.1-mL input) in an HIV-1 p24 antigen-reactive and anti-HIV-1/2-nonreactive specimen was undetectable when diluted to 1-in-50 (1-in-50). Terminal dilution of seven HIV-1 RNA-containing plasma panel specimens indicated a proportional loss of HIV-1 RNA detectability with increasing dilution. CONCLUSION GAT for detection of HIV-1 RNA in individual specimens was more sensitive than other HIV markers. For pooled plasma testing, GAT-independent constraints, such as effects of dilution, may preclude the use of GAT detection as a replacement for individual unit testing with HIV serologic assays.
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Affiliation(s)
- M Kemper
- Sacramento Medical Foundation Center for Blood Research, California, USA
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36
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Hirabayashi Y, Matsumura T, Matsuda M, Kuramoto K, Motoyoshi K, Yoshida K, Sasaki H, Inoue T. Cell kinetics of hemopoietic colony-forming units in spleen (CFU-S) in young and old mice. Mech Ageing Dev 1998; 101:221-31. [PMID: 9622226 DOI: 10.1016/s0047-6374(97)00175-9] [Citation(s) in RCA: 14] [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: 02/07/2023]
Abstract
The growth potential of the hemopoietic progenitor cells from young and old mice is similar. Previous studies of their cell-kinetics showed no significant differences between them when measured by the incorporation of tritiated thymidine ([3H]TdR). A different approach for exploring stem-cell kinetics in aged animals is provided by another method; the incorporation of bromodeoxyuridine (BrdUrd) during DNA synthesis followed by exposure to near-ultraviolet light (near-UV) kills BrdUrd labelled cells in DNA-synthesis (S-phase). This BrdUrd-near UV cytocide (BUUV) reveals the size of cycling fractions at the level of hemopoietic progenitor cells; it also demonstrates the velocity of the cells entering S-phase when cells are labeled by a continuous infusion of BrdUrd by an osmotic pump, followed by an appropriate colony-assay for each progenitor cell. We compared the cell kinetics of young and old hemopoietic progenitor cells (CFU-S) by this approach. Osmotic pumps were implanted subcutaneously in the backs of young (2 months) and old (22 months) male C57BL/6CrSlc mice for 2, 4, 8, 12, and 16 days to continuously infuse BrdUrd at a flow-rate of 1 mg/h per kg. Cells were harvested from femoral marrow of the infused mice, plated in non-coated bacterial plates, and exposed to a single dose of near-UV at 4000 J/m2. After BUUV cytocide, bone-marrow cells were assayed for 8- and 13-day CFU-S colonies. In the 8-day colonies, the cytocide fraction of CFU-S from young mice increased rapidly, whereas the fraction from old mice showed flatter curves. Both curves reached a plateau at 52.6% for young, and 43.9% for old mice, and then converged 4 days after labeling. In the 13-day colonies, the curve for the aged was much flatter than that for the young; however, the plateaus in both young and old are similar, but at much lower values than earlier, i.e. 24.5% and 16.0%, respectively. The size of the cycling fraction of progenitor cells was close in the two groups during the steady-state cell-cycle. However, the velocity of the cell cycle at a progenitor level was very different, old mice being much slower. Further, within the progenitors, the cell cycle was much slower in the primitive ones and became faster when the stem cells differentiated into mature progenitor cells.
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Affiliation(s)
- Y Hirabayashi
- Division of Cellular and Molecular Toxicology, National Institute of Health Sciences, Tokyo, Japan.
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37
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Kuramoto K, Oda K, Katsutani S, Fujii T, Abe K, Imamura N, Kimura A. [Acquired pure red cell aplasia associated with relapsed non-Hodgkin's lymphoma: a case report-improvement of PRCA after acute hepatitis]. Rinsho Ketsueki 1998; 39:290-6. [PMID: 9597896] [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: 02/07/2023]
Abstract
A 47-year-old male patient was admitted because of anemia. He had been diagnosed as non-Hodgkin's lymphoma (Follicular mixed, B cell type, stage ISA) by splenectomy two years before. Bone marrow examination on admission revealed lymphoma cell infiltration and marked decrease in erythroid cells. These findings confirmed relapsed lymphoma with acquired pure red cell aplasia. After several courses of combination chemotherapy, lymphoma cells disappeared from bone marrow, but PRCA was not improved. In this case there were two times remission of PRCA. At first time, acute B type hepatitis occurred during the chemotherapy, anemia improved transiently. At the second time, mild acute hepatitis associated with herpes zoster occurred. Twenty days after hepatic injury, PRCA was improved, and continued in remission state till present day. To disclose the mechanism of PRCA in this case, erythroid colony assay of marrow cells was performed. This showed the presence of inhibitory factor in patient's serum at PRCA state, that was considered to be related to the occurrence of PRCA. These findings suggest that the improvement of PRCA was associated with the changes on immunological condition after acute hepatitis in this case.
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Affiliation(s)
- K Kuramoto
- Department of Hematology and Oncology, Hiroshima University
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38
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Sakakibara Y, Kuramoto K, Jikuya T, Sato F, Nakamura K, Abe M, Mitsui T. An approach for acute disruption of large arteries in patients with advanced cervical cancer: endoluminal balloon occlusion technique. Ann Surg 1998; 227:134-7. [PMID: 9445121 PMCID: PMC1191183 DOI: 10.1097/00000658-199801000-00019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To test the feasibility of an intraluminal balloon occlusion technique for the control of sudden arterial disruption from cervical branches in patients with advanced malignancy. BACKGROUND A sudden disruption of large cervical arteries is a devastating complication of advanced cervical malignancy and local infection. METHODS Three patients with this complication underwent endoluminal balloon occlusion before surgical management. A double-lumen balloon catheter was introduced from the femoral artery to the bleeding point. Angiographic examination of the intracranial cross-filling could be performed by the injection of contrast medium from the opposite carotid artery, and consciousness levels could be directly confirmed under unilateral carotid occlusion. RESULTS Resection of the carotid or innominate artery was safely performed in all the patients. No neurologic complications occurred. Bleeding did not recur during follow-up (range 5-32 months). CONCLUSIONS This experience, although limited, suggests that surgical intervention to control cervical arterial bleeding with intraluminal balloon occlusion prevents excessive bleeding, decreases the risk of damage to the central nervous system, and improves the outcome in these critically ill patients.
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Affiliation(s)
- Y Sakakibara
- Department of Surgery and Radiology, Institute of Clinical Medicine, University of Tsukuba, Tsukuba Science City, Ibaraki, Japan
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39
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Kuramoto K, Mitamura H, Banba T, Muraoka S. Development of ceramic waste forms for actinide-rich waste— Radiation stability of perovskite and phase and chemical stabilities of ZR-and AL-based ceramics. Progress in Nuclear Energy 1998. [DOI: 10.1016/s0149-1970(97)00061-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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40
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Yoh K, Nagase S, Aoyagi K, Kuramoto K, Yoshida H, Kobayashi M, Itai Y, Koyama A. Treatment of an arteriovenous fistula by the placement of a Z-stent and embolization in a patient with nephrotic syndrome. Nephrol Dial Transplant 1997; 12:2182-4. [PMID: 9351091 DOI: 10.1093/ndt/12.10.2182] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Affiliation(s)
- K Yoh
- Department of Internal Medicine, Institute of Clinical Medicine, University of Tsukuba, Ibaraki, Japan
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41
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Tanemura K, Wakayama T, Kuramoto K, Hayashi Y, Sato E, Ogura A. Birth of normal young by microinsemination with frozen-thawed round spermatids collected from aged azoospermic mice. Lab Anim Sci 1997; 47:203-4. [PMID: 9150504] [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: 02/04/2023]
Affiliation(s)
- K Tanemura
- Department of Veterinary Anatomy, Faculty of Agriculture, University of Tokyo, Japan
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42
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Nakamura K, Nozue M, Sakakibara Y, Kuramoto K, Satoh M, Kobayashi S, Kashimura H, Fukutomi H, Todoroki T, Fukao K. Natural history of a spontaneous dissecting aneurysm of the proximal superior mesenteric artery: report of a case. Surg Today 1997; 27:272-4. [PMID: 9068114 DOI: 10.1007/bf00941661] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [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: 02/03/2023]
Abstract
We report herein the case of a 44-year-old man in whom an asymptomatic dissecting aneurysm was found in the proximal part of the superior mesenteric artery (SMA) during a preoperative evaluation for colon cancer. The patient was managed conservatively with blood pressure control during the perioperative period of the colon resection as the false lumen of the dissecting aneurysm was revealed to be completely occluded by thrombus. The thrombus in the false lumen continued to be absorbed until 1 month after surgery. The patient is currently well 4 years after his operation without any evidence of recurrence of the aneurysm.
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Affiliation(s)
- K Nakamura
- Tsukuba University Hospital, Institute of Clinical Medicine, University of Tsukuba, Ibaraki, Japan
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43
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Tanemura K, Kanai Y, Kanai-Azuma M, Kurohmaru M, Kuramoto K, Yazaki K, Hayashi Y. Reinitiation of spermatogonial mitotic differentiation in inactive old BDF1 mouse seminiferous tubules transplanted to W/Wv mouse testis. Biol Reprod 1996; 55:1237-42. [PMID: 8949879 DOI: 10.1095/biolreprod55.6.1237] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The seminiferous epithelia of old mice (33 mo of age) are composed of spermatogonia and Sertoli cells. Histochemical examination using the anti-c-kit monoclonal antibody demonstrated that the number of differentiating type A spermatogonia decreases with age. To elucidate the differential activity of old mouse spermatogonia, we transplanted extremely thin seminiferous epithelia of old BDF, mice into W/Wv mouse testes and examined whether or not they could reinitiate differentiation. Artificially cryptorchid mice were used as the control. At 2 wk after transplantation, spermatocytes and round spermatids were detected in transplanted seminiferous tubules of the control, whereas the most advanced spermatogenic cells in those of old mice were spermatocytes. At 4 wk after transplantation, although elongated spermatids were detected in transplanted tubules of the control, haploid cells (spermatids) were still undetectable in those derived from old mice. Thus, meiosis was never restored, although spermatogonia of old mice can reinitiate differentiation into spermatocytes under suitable testicular conditions. Since it has been reported in several mammalian species that age-related changes in the testicular microenvironment lead to the gerontal cessation of spermatogenesis, the present results suggest that both a defective extratubular environment and a defective intratubular environment may cause the cessation of spermatogenesis in old BDF, mice.
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Affiliation(s)
- K Tanemura
- Department of Veterinary Anatomy, Faculty of Agriculture, University of Tokyo, Japan
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44
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Holland PV, Barrera JM, Ercilla MG, Yoshida CF, Wang Y, de Olim GA, Betlach B, Kuramoto K, Okamoto H. Genotyping hepatitis C virus isolates from Spain, Brazil, China, and Macau by a simplified PCR method. J Clin Microbiol 1996; 34:2372-8. [PMID: 8880482 PMCID: PMC229272 DOI: 10.1128/jcm.34.10.2372-2378.1996] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
An improved and simplified method of genotyping was developed for classifying hepatitis C virus (HCV) isolates into the five common genotypes, i.e., I/1a, II/1b, III/2a, IV/2b, and V/3a, by PCR with genotype-specific primers deduced from the core gene. Sense and antisense primers, specific for each of the five common genotypes, were designed by comparison of 319 core gene sequences from HCV isolates of various genotypes from genetic groups 1 to 9. In the first round of PCR, a sequence of 433 bp representing nucleotides 319 to 751 was amplified with universal primers. The second round of PCR was performed with respective sense and antisense primers in two separate reactions, one for the amplification of genotypes I/1a and II/1b and the other for the amplification of genotypes III/2a, IV/2b, and V/3a. The specificity of genotyping was confirmed with a panel of 191 serum samples containing HCV isolates whose core gene sequences were known: 110 serum samples infected with HCV of the five common genotypes and 81 serum samples infected with HCV of other genotypes. The use of sense and antisense primers for genotype II/1b (primers 389 and 492) abolished the cross-reaction of the antisense primer for genotype II/1b (primer 133) with some HCV isolates of genotype I/1a found by our original method. The new method was used for genotyping 130 HCV isolates from Spain, 53 from Brazil, 106 from China, and 30 from Macau. A total of 329 bp of the NS5b region (nucleotides 8279 to 8607) of five isolates from Spain and five isolates from Macau which could not be classified as any of the five common HCV genotypes or genotype 2c were sequenced, and the sequences were compared with those of HCV isolates of known genotypes; two isolates from Spain were deduced to be of genotype 4d and one was deduced to be of genotype 1d, while the remaining two isolates from Spain had novel genotypes in genetic group 2; however, all five isolates from Macau were of genotype 6a.
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45
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Takano K, Miyazaki T, Kuramoto K, Hand AR. Secretory granule formation and synthesis pathway of secretory proteins in parotid gland cells. Eur J Morphol 1996; 34:233-6. [PMID: 8874103 DOI: 10.1076/ejom.34.3.233.13038] [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: 02/02/2023]
Abstract
The cytochemical technique for endogenous peroxidase and an immunocytochemical method with protein A-gold were used to investigate the formation of the secretory granule substructure in acinar cells of the gerbil parotid glands in normal conditions and after treatment with the ionophore monensin. In untreated animals and 90 min after treatment with monensin, peroxidase activity was seen in rER, in transport vesicles close to the condensing vacuoles, and in the dense core of condensing vacuoles and secretory granules, whereas the Golgi cisternae remain unreactive. At 45 or 60 min after stimulation with monensin, the condensing vacuoles and the immature granules in the trans Golgi area did not exhibit dense cores and their content appeared similar to the peripheral portion of the mature secretory granules. These observations suggest that, in Mongolian gerbil parotid acinar cells, some substances such as peroxidase may be transported from the rER directly to the condensing vacuoles.
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Affiliation(s)
- K Takano
- Department of Oral Histology, Nagasaki University School of Dentistry, Japan
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46
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Abstract
We report a case with insulinoma that showed higher attenuation than normal pancreatic parenchyma on precontrast CT. Pathology of the surgical specimen revealed the presence of psammoma bodies, which were responsible for hyperattenuation. It is worthwhile to obtain precontrast CT in patients suspected of having insulinoma.
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Affiliation(s)
- Y Kurosaki
- Department of Radiology, Institute of Clinical Medicine, University of Tsukuba, Tsukuba-shi, Ibaraki-ken 305, Japan
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47
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Ueda S, Kuramoto K, Ozawa T. [Long-term prognosis of chronic heart failure in the elderly]. Nihon Ronen Igakkai Zasshi 1996; 33:340-5. [PMID: 8741362 DOI: 10.3143/geriatrics.33.340] [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: 02/01/2023]
Abstract
To elucidate the predictors of the mortality rate in the elderly with chronic heart failure (HF), 120 consecutive patients (mean age, 75.2 +/- 7.8 years) with heart failure (NYHA I-II) were analyzed prospectively for 5 years. [Methods] Left ventricular ejection fraction (EF), left ventricular diastolic and systolic dimension (LVDD and LVDS) and wall thickness (WT) were measured by echocardiogram. Venipuncture for measurement of ANP and norepinephrine (NE) was done in supine position after 30 minute rest. [Results] 1) HF was associated with hypertension (47.5%), ischemic heart disease (34%), valvular disease (15%) and atrial fibrillation (AF, 23%). 2) 15 and 11 patients died for cardiac and non-cardiac events, respectively. 3) There was no difference in mean ages, gender, blood pressure, plasma-NE, EF, LVDD, LVDS, WT and AF between cardiac death and control groups. However, plasma ANP was higher in cardiac death group (173 pg/ml) than in control group (76 pg/ml) (p < 0.01). 4) Cox proportional hazard regression model revealed that ANP was an independent predictor for cardiac death (p < 0.005). We conclude that only plasma ANP level predicts long-term prognosis of chronic heart failure in the elderly.
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Affiliation(s)
- S Ueda
- Cardiovascular Division, Tokyo Metropolitan Geriatric Hospital, Japan
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48
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Kikukawa M, Arie Y, Kuramoto K, Tsutsumi H, Hirai M, Kumakawa T, Sawabe M, Mori M. [Primary myelofibrosis with severe bone pain]. Rinsho Ketsueki 1996; 37:228-32. [PMID: 8727347] [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: 02/01/2023]
Abstract
An 80-year-old man was admitted with bone pain, affecting both lower limbs and the dorsa of the feet, in September, 1991. Primary myelofibrosis was diagnosed. Bilateral x-ray films of the tibia, fibula, femur and vertebra revealed osteoporosis, but this was considered an unlikely source of the bone pain. The bone pain subsequently disappeared, but then became severe in both lower limbs and the dorsa of the feet and was accompanied by leukemic transformations in February, 1992. He died of aspiration pneumonia in July, 1992. Autopsy revealed microfractures with osteoporosis and infiltration of leukemic cells in the periosteum of the left tibia, which may have caused the bone pain. This case provides useful information to analyze the cause of bone pain in patients with myelofibrosis.
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Affiliation(s)
- M Kikukawa
- Department of Hematology Tokyo Metropolitan Geriatric Hospital, Japan
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49
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Abstract
The concentrations of hyaluronan (HA) and chondroitin sulfate (CS) in rabbit tears were determined using high performance liquid chromatography. The tears were taken from both normal eyes and eyes with a corneal epithelial defect. The concentration of CS was 7.61 times higher than that of HA in the tears of normal eyes. When the concentration of CS isomers was compared, the highest concentration was observed in chondroitin 6-sulfate (C6S), followed by chondroitin 4-sulfate (C4S) and chondroitin (C0S), in that order. When the corneal epithelium was removed from the left eye using a trephine and microscissors, a significant increase was detected in the concentrations of HA and C6S in tears of the left eye one day after removal, whereas no change was observed in those of the right eye. In addition, a significant positive correlation was observed between the increased amount of HA concentration and the healing rate of the corneal epithelium. These results suggest that the increase of HA concentration in tears is associated with spontaneous corneal epithelial healing.
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Affiliation(s)
- S Miyauchi
- Tokyo Research Institute, Seikagaku Corporation, Japan
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50
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Kurosaki Y, Kuramoto K, Itai Y. Delayed enhancement of peripheral zone of neurofibromas at magnetic resonance imaging. Eur Radiol 1996; 6:99-101. [PMID: 8797963 DOI: 10.1007/bf00619971] [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: 02/02/2023]
Abstract
It is well known that bizonal histologic appearance characteristic of neurofibromas are reflected on magnetic resonance (MR) images. We report a case in which a delayed enhanced MR image showed that the entire mass enhanced homogeneously resulting in loss of zonal distinction on early enhanced MR image.
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Affiliation(s)
- Y Kurosaki
- Department of Radiology, University of Tsukuba, Ibaraki-ken, Japan
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