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Mizoguchi R, Kozaki K. Ontology-Enhanced Thesaurus for Promoting Biomimetics Research. Biomimetics (Basel) 2022. [DOI: 10.1201/9781003277170-2] [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: 11/11/2022] Open
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2
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Egami S, Kawamura T, Kozaki K, Ohsuga A. Detecting Vicious Cycles in Urban Problem Knowledge Graph using
Inference Rules. Data Intelligence 2022. [DOI: 10.1162/dint_a_00113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Abstract
Urban areas have many problems, including homelessness, graffiti, and littering. These problems are influenced by various factors and are linked to each other; thus, an understanding of the problem structure is required in order to detect and solve the root problems that generate vicious cycles. Moreover, before implementing action plans to solve these problems, local governments need to estimate cost-effectiveness when the plans are carried out. Therefore, this paper proposed constructing an urban problem knowledge graph that would include urban problems' causality and the related cost information in budget sheets. In addition, this paper proposed a method for detecting vicious cycles of urban problems using SPARQL queries with inference rules from the knowledge graph. Finally, several root problems that led to vicious cycles were detected. Urban-problem experts evaluated the extracted causal relations.
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Affiliation(s)
- Shusaku Egami
- National Institute of Advanced Industrial Science and Technology (AIST), Tokyo 135-0064, Japan
- Graduate School of Informatics and Engineering, The University of Electro-Communications, Tokyo 182-8585, Japan
| | - Takahiro Kawamura
- National Institute of Advanced Industrial Science and Technology (AIST), Tokyo 135-0064, Japan
- National Agriculture and Food Research Organization, Ibaraki 305-8517, Japan
| | - Kouji Kozaki
- National Institute of Advanced Industrial Science and Technology (AIST), Tokyo 135-0064, Japan
- Faculty of Information and Communication Engineering, Osaka Electro-Communication University, Osaka 572-8530, Japan
| | - Akihiko Ohsuga
- Graduate School of Informatics and Engineering, The University of Electro-Communications, Tokyo 182-8585, Japan
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Vos RA, Katayama T, Mishima H, Kawano S, Kawashima S, Kim JD, Moriya Y, Tokimatsu T, Yamaguchi A, Yamamoto Y, Wu H, Amstutz P, Antezana E, Aoki NP, Arakawa K, Bolleman JT, Bolton E, Bonnal RJP, Bono H, Burger K, Chiba H, Cohen KB, Deutsch EW, Fernández-Breis JT, Fu G, Fujisawa T, Fukushima A, García A, Goto N, Groza T, Hercus C, Hoehndorf R, Itaya K, Juty N, Kawashima T, Kim JH, Kinjo AR, Kotera M, Kozaki K, Kumagai S, Kushida T, Lütteke T, Matsubara M, Miyamoto J, Mohsen A, Mori H, Naito Y, Nakazato T, Nguyen-Xuan J, Nishida K, Nishida N, Nishide H, Ogishima S, Ohta T, Okuda S, Paten B, Perret JL, Prathipati P, Prins P, Queralt-Rosinach N, Shinmachi D, Suzuki S, Tabata T, Takatsuki T, Taylor K, Thompson M, Uchiyama I, Vieira B, Wei CH, Wilkinson M, Yamada I, Yamanaka R, Yoshitake K, Yoshizawa AC, Dumontier M, Kosaki K, Takagi T. BioHackathon 2015: Semantics of data for life sciences and reproducible research. F1000Res 2020; 9:136. [PMID: 32308977 PMCID: PMC7141167 DOI: 10.12688/f1000research.18236.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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] [Accepted: 02/05/2020] [Indexed: 01/08/2023] Open
Abstract
We report on the activities of the 2015 edition of the BioHackathon, an annual event that brings together researchers and developers from around the world to develop tools and technologies that promote the reusability of biological data. We discuss issues surrounding the representation, publication, integration, mining and reuse of biological data and metadata across a wide range of biomedical data types of relevance for the life sciences, including chemistry, genotypes and phenotypes, orthology and phylogeny, proteomics, genomics, glycomics, and metabolomics. We describe our progress to address ongoing challenges to the reusability and reproducibility of research results, and identify outstanding issues that continue to impede the progress of bioinformatics research. We share our perspective on the state of the art, continued challenges, and goals for future research and development for the life sciences Semantic Web.
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Affiliation(s)
- Rutger A. Vos
- Institute of Biology Leiden, Leiden University, Leiden, The Netherlands
- Naturalis Biodiversity Center, Leiden, The Netherlands
| | | | - Hiroyuki Mishima
- Department of Human Genetics, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Shin Kawano
- Database Center for Life Science, Tokyo, Japan
| | | | | | - Yuki Moriya
- Database Center for Life Science, Tokyo, Japan
| | | | | | | | - Hongyan Wu
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | | | - Erick Antezana
- Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway
| | - Nobuyuki P. Aoki
- Faculty of Science and Engineering, SOKA University, Tokyo, Japan
| | - Kazuharu Arakawa
- Institute for Advanced Biosciences, Keio University, Tokyo, Japan
| | - Jerven T. Bolleman
- SIB Swiss Institute of Bioinformatics, Centre Medical Universitaire, Lausanne, Switzerland
| | - Evan Bolton
- National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, USA
| | - Raoul J. P. Bonnal
- Istituto Nazionale Genetica Molecolare, Romeo ed Enrica Invernizzi, Milan, Italy
| | | | - Kees Burger
- Dutch Techcentre for Life Sciences, Utrecht, The Netherlands
| | - Hirokazu Chiba
- National Institute for Basic Biology, National Institutes of Natural Sciences, Okazaki, Japan
| | - Kevin B. Cohen
- Computational Bioscience Program, University of Colorado School of Medicine, Denver, USA
- Université Paris-Saclay, LIMSI, CNRS, Paris, France
| | | | | | - Gang Fu
- National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, USA
| | | | | | | | - Naohisa Goto
- Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Tudor Groza
- St Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Darlinghurst, Australia
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, Australia
| | - Colin Hercus
- Novocraft Technologies Sdn. Bhd., Selangor, Malaysia
| | - Robert Hoehndorf
- Computational Bioscience Research Center, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Kotone Itaya
- Institute for Advanced Biosciences, Keio University, Tokyo, Japan
| | - Nick Juty
- European Molecular Biology Laboratory, European Bioinformatics Institute, Hinxton, UK
| | | | - Jee-Hyub Kim
- European Molecular Biology Laboratory, European Bioinformatics Institute, Hinxton, UK
| | - Akira R. Kinjo
- Institute for Protein Research, Osaka University, Osaka, Japan
| | - Masaaki Kotera
- School of Life Science and Technology, Tokyo Institute of Technology, Tokyo, Japan
| | - Kouji Kozaki
- The Institute of Scientific and Industrial Research, Osaka University, Osaka, Japan
| | | | - Tatsuya Kushida
- National Bioscience Database Center, Japan Science and Technology Agency, Tokyo, Japan
| | - Thomas Lütteke
- Institute of Veterinary Physiology and Biochemistry, Justus-Liebig University Giessen, Giessen, Germany
- Gesellschaft für innovative Personalwirtschaftssysteme mbH (GIP GmbH), Offenbach, Germany
| | | | | | - Attayeb Mohsen
- National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan
| | - Hiroshi Mori
- Center for Information Biology, National Institute of Genetics, Mishima, Japan
| | - Yuki Naito
- Database Center for Life Science, Tokyo, Japan
| | | | | | | | - Naoki Nishida
- Department of Systems Science, Osaka University, Osaka, Japan
| | - Hiroyo Nishide
- National Institute for Basic Biology, National Institutes of Natural Sciences, Okazaki, Japan
| | - Soichi Ogishima
- Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan
| | - Tazro Ohta
- Database Center for Life Science, Tokyo, Japan
| | - Shujiro Okuda
- Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Benedict Paten
- UC Santa Cruz Genomics Institute, University of California, Santa Cruz, USA
| | | | - Philip Prathipati
- National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan
| | - Pjotr Prins
- University Medical Center Utrecht, Utrecht, The Netherlands
- University of Tennessee Health Science Center, Memphis, USA
| | - Núria Queralt-Rosinach
- Department of Biomedical Informatics, Harvard Medical School, Boston, Massachusetts, USA
| | | | - Shinya Suzuki
- School of Life Science and Technology, Tokyo Institute of Technology, Tokyo, Japan
| | - Tsuyosi Tabata
- Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | | | - Kieron Taylor
- European Molecular Biology Laboratory, European Bioinformatics Institute, Hinxton, UK
| | - Mark Thompson
- Leiden University Medical Center, Leiden, The Netherlands
| | - Ikuo Uchiyama
- National Institute for Basic Biology, National Institutes of Natural Sciences, Okazaki, Japan
| | - Bruno Vieira
- WurmLab, School of Biological & Chemical Sciences, Queen Mary University of London, London, UK
| | - Chih-Hsuan Wei
- National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, USA
| | - Mark Wilkinson
- Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid, Madrid, Spain
| | | | | | - Kazutoshi Yoshitake
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | | | - Michel Dumontier
- Institute of Data Science, Maastricht University, Maastricht, The Netherlands
| | - Kenjiro Kosaki
- Center for Medical Genetics, Keio University School of Medicine, Tokyo, Japan
| | - Toshihisa Takagi
- National Bioscience Database Center, Japan Science and Technology Agency, Tokyo, Japan
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
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Nagai K, Koshiba H, Shibata S, Hirasawa A, Ebihara T, Kozaki K. Relationship of Serum Carnitine Level with Falls and Gait Disturbance in the Elderly. J Frailty Aging 2018; 6:178-182. [PMID: 29165532 DOI: 10.14283/jfa.2017.36] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND Gait disturbance and falls are serious events that can impair activities of daily living (ADL) in the elderly. On the other hand, carnitine plays essential roles in energy production, and carnitine deficiency leads to low activity levels. OBJECTIVES We examined whether a lower serum carnitine concentration was correlated with falls and gait disturbances in the elderly. DESIGN, SETTING, AND PARTICIPANTS We performed a cross-sectional study. One hundred and ninety-eight elderly patients (male, 83; female, 115; 81 ± 6 years old) were enrolled in this study. MEASUREMENTS Physical performance (hand grip strength, leg strength, walking speed, one-leg standing time, and tandem gait steps) and frailty status (The Edmonton Frail Scale: EFS) were evaluated. The serum total, free, and acylated carnitine levels were measured using an enzyme cycling method. We then investigated the associations between the serum carnitine level, history of falls, and the results of these physical examinations. RESULTS Of the 198 subjects, 56 (28%) had a history of falls within the past one year. The patients with a history of falls had lower serum total carnitine and free carnitine levels than those without a history of falls. Regarding the physical performance results, the patients with a history of falls had higher EFS scores, a weaker hand grip strength, a slower walking speed, a shorter one-leg standing time, and a smaller number of tandem gait steps than those without a history of falls. A logistic regression analysis showed that the low serum total carnitine concentration was identified as an independent factor associated with a history of falls, a slow walking speed after adjustments for age, sex and modified EFS. CONCLUSIONS A low serum carnitine level is associated with a history of falls and gait disturbances in elderly people.
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Affiliation(s)
- K Nagai
- Kumiko Nagai, Department of Geriatric Medicine, Kyorin University School of Medicine, 6-20-2 Shinkawa, Mitaka, Tokyo 181-8611, Japan, Phone: +81-422-47-5511, Fax: +81-422-44-1917, E-mail:
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Abstract
Background Medical ontologies are expected to contribute to the effective use of medical information resources that store considerable amount of data. In this study, we focused on disease ontology because the complicated mechanisms of diseases are related to concepts across various medical domains. The authors developed a River Flow Model (RFM) of diseases, which captures diseases as the causal chains of abnormal states. It represents causes of diseases, disease progression, and downstream consequences of diseases, which is compliant with the intuition of medical experts. In this paper, we discuss a fact repository for causal chains of disease based on the disease ontology. It could be a valuable knowledge base for advanced medical information systems. Methods We developed the fact repository for causal chains of diseases based on our disease ontology and abnormality ontology. This section summarizes these two ontologies. It is developed as linked data so that information scientists can access it using SPARQL queries through an Resource Description Framework (RDF) model for causal chain of diseases. Results We designed the RDF model as an implementation of the RFM for the fact repository based on the ontological definitions of the RFM. 1554 diseases and 7080 abnormal states in six major clinical areas, which are extracted from the disease ontology, are published as linked data (RDF) with SPARQL endpoint (accessible API). Furthermore, the authors developed Disease Compass, a navigation system for disease knowledge. Disease Compass can browse the causal chains of a disease and obtain related information, including abnormal states, through two web services that provide general information from linked data, such as DBpedia, and 3D anatomical images. Conclusions Disease Compass can provide a complete picture of disease-associated processes in such a way that fits with a clinician’s understanding of diseases. Therefore, it supports user exploration of disease knowledge with access to pertinent information from a variety of sources. Electronic supplementary material The online version of this article (doi:10.1186/s13326-017-0132-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Kouji Kozaki
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan.
| | - Yuki Yamagata
- National Institute of Biomedical Innovation, Health and Nutrition, 7-6-8, Saito-Asagi, Ibaraki, Osaka, 567-0085, Japan
| | - Riichiro Mizoguchi
- Research Center for Service Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan
| | - Takeshi Imai
- Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Kazuhiko Ohe
- Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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Ma X, Imai T, Shinohara E, Sakurai R, Kozaki K, Ohe K. A Semi-Automatic Framework to Identify Abnormal States in EHR Narratives. Stud Health Technol Inform 2017; 245:910-914. [PMID: 29295232] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Disease ontology, defined as a causal chain of abnormal states, is believed to be a valuable knowledge base in medical information systems. Automatic mapping between electronic health records (EHR) and disease ontology is indispensable for applying disease ontology in real clinical settings. Based on an analysis of ontologies of 148 chronic diseases, approximately 41% of abnormal states require information extraction from clinical narratives. This paper presents a semi-automatic framework to identify abnormal states in clinical narratives. This framework aims to effectively build mapping modules between EHR and disease ontology. We show that the proposed method is effective in data mapping for 18%-33% of the abnormal states in the ontologies of chronic diseases. Moreover, we analyze the abnormal states for which our method is invalid in extracting information from clinical narratives.
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Affiliation(s)
- Xiaojun Ma
- Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Takeshi Imai
- Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | | | | | - Kouji Kozaki
- The Institute of Scientific and Industrial Research, Osaka University, Osaka, Japan
| | - Kazuhiko Ohe
- Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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7
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Yamagata Y, Kozaki K, Imai T, Ohe K, Mizoguchi R. An ontological modeling approach for abnormal states and its application in the medical domain. J Biomed Semantics 2014; 5:23. [PMID: 24944781 PMCID: PMC4062306 DOI: 10.1186/2041-1480-5-23] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [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: 09/17/2013] [Accepted: 05/07/2014] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND Recently, exchanging data and information has become a significant challenge in medicine. Such data include abnormal states. Establishing a unified representation framework of abnormal states can be a difficult task because of the diverse and heterogeneous nature of these states. Furthermore, in the definition of diseases found in several textbooks or dictionaries, abnormal states are not directly associated with the corresponding quantitative values of clinical test data, making the processing of such data by computers difficult. RESULTS We focused on abnormal states in the definition of diseases and proposed a unified form to describe an abnormal state as a "property," which can be decomposed into an "attribute" and a "value" in a qualitative representation. We have developed a three-layer ontological model of abnormal states from the generic to disease-specific level. By developing an is-a hierarchy and combining causal chains of diseases, 21,000 abnormal states from 6000 diseases have been captured as generic causal relations and commonalities have been found among diseases across 13 medical departments. CONCLUSIONS Our results showed that our representation framework promotes interoperability and flexibility of the quantitative raw data, qualitative information, and generic/conceptual knowledge of abnormal states. In addition, the results showed that our ontological model have found commonalities in abnormal states among diseases across 13 medical departments.
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Affiliation(s)
- Yuki Yamagata
- ISIR, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, Japan
| | - Kouji Kozaki
- ISIR, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, Japan
| | - Takeshi Imai
- Department of Medical Informatics, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan
| | - Kazuhiko Ohe
- Department of Medical Informatics, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan
| | - Riichiro Mizoguchi
- Research Center for Service Science, School of Knowledge Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, Japan
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Kozaki K, Tanaka M, Koshiba H, Toba K, Sudo N. Gender difference of sarcopenia in cognitive declined elderly. Eur Geriatr Med 2013. [DOI: 10.1016/j.eurger.2013.07.269] [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: 11/30/2022]
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Chen L, Akishita M, Kuzuya M, Kozaki K, Kojima T, Toba K, Ouchi Y. Future perspective on active ageing from rapidly ageing Asian countries. Eur Geriatr Med 2012. [DOI: 10.1016/j.eurger.2012.07.384] [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] [Indexed: 11/30/2022]
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Masuya H, Makita Y, Kobayashi N, Nishikata K, Yoshida Y, Mochizuki Y, Doi K, Takatsuki T, Waki K, Tanaka N, Ishii M, Matsushima A, Takahashi S, Hijikata A, Kozaki K, Furuichi T, Kawaji H, Wakana S, Nakamura Y, Yoshiki A, Murata T, Fukami-Kobayashi K, Mohan S, Ohara O, Hayashizaki Y, Mizoguchi R, Obata Y, Toyoda T. The RIKEN integrated database of mammals. Nucleic Acids Res 2010; 39:D861-70. [PMID: 21076152 PMCID: PMC3013680 DOI: 10.1093/nar/gkq1078] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The RIKEN integrated database of mammals (http://scinets.org/db/mammal) is the official undertaking to integrate its mammalian databases produced from multiple large-scale programs that have been promoted by the institute. The database integrates not only RIKEN's original databases, such as FANTOM, the ENU mutagenesis program, the RIKEN Cerebellar Development Transcriptome Database and the Bioresource Database, but also imported data from public databases, such as Ensembl, MGI and biomedical ontologies. Our integrated database has been implemented on the infrastructure of publication medium for databases, termed SciNetS/SciNeS, or the Scientists' Networking System, where the data and metadata are structured as a semantic web and are downloadable in various standardized formats. The top-level ontology-based implementation of mammal-related data directly integrates the representative knowledge and individual data records in existing databases to ensure advanced cross-database searches and reduced unevenness of the data management operations. Through the development of this database, we propose a novel methodology for the development of standardized comprehensive management of heterogeneous data sets in multiple databases to improve the sustainability, accessibility, utility and publicity of the data of biomedical information.
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Ohta M, Kozaki K, Mizoguchi R. An Extension of an Environment for Building/using Ontologies "Hozo" toward Practical Ontology Engineering. Informatics 2010. [DOI: 10.2316/p.2010.725-066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Qi S, Mogi S, Tsuda H, Tanaka Y, Kozaki K, Imoto I, Inazawa J, Hasegawa S, Omura K. Expression of cIAP-1 correlates with nodal metastasis in squamous cell carcinoma of the tongue. Int J Oral Maxillofac Surg 2008; 37:1047-53. [PMID: 18621506 DOI: 10.1016/j.ijom.2008.06.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2007] [Revised: 03/06/2008] [Accepted: 06/04/2008] [Indexed: 10/21/2022]
Abstract
Cellular inhibitor-of-apoptosis protein 1 (cIAP-1) is a member of the inhibitor-of- apoptosis protein family, which predominantly regulates apoptosis. It has been suggested that expression of cIAP-1 correlates with certain clinicopathological features. The possible significance of cIAP-1 expression in cervical lymph node metastasis of tongue squamous cell carcinoma (SCC) is investigated. Seventy-five tongue SCCs were analyzed by immunohistochemistry. cIAP-1 immunoreactivity patterns were nuclear in 38 (51%), cytoplasmic in 47 (63%), and concurrent in 37 (49%) cases. Nuclear, cytoplasmic and concurrent cIAP-1 immunoreactions were significantly correlated with lymph node metastasis in tongue SCCs (P=0.0011, 0.0012, and 0.0006, respectively). The cleaved caspase-3, which is a marker of tumor apoptosis, and Ki-67 index, which is a marker of tumor proliferation, were immunohistochemically examined in 21 tongue SCCs with concurrent nuclear and cytoplasmic cIAP-1 expression and with metastasis, and in 23 tongue SCCs without concurrent nuclear and cytoplasmic cIAP-1 expression and without metastasis. Concurrent cIAP-1 expression was inversely correlated with caspase-3 (P=0.0066), but was positively correlated with Ki-67 expression (P=0.0028). The mode of invasion was associated with lymph node metastasis (P=0.014) and differentiation (P=0.013), but was not correlated with cIAP-1 expression. There was no statistically significant correlation between nuclear or cytoplasmic cIAP-1 expression and the clinicopathological factors of gender, age, clinical stage or differentiation. These results suggest that both patterns of cIAP-1 are useful markers for predicting cervical lymph node metastasis in tongue SCC.
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Affiliation(s)
- S Qi
- Oral and Maxillofacial Surgery, Department of Oral Restitution, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
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15
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Tanaka K, Imoto I, Inoue J, Kozaki K, Tsuda H, Shimada Y, Aiko S, Yoshizumi Y, Iwai T, Kawano T, Inazawa J. Frequent methylation-associated silencing of a candidate tumor-suppressor, CRABP1, in esophageal squamous-cell carcinoma. Oncogene 2007; 26:6456-68. [PMID: 17438526 DOI: 10.1038/sj.onc.1210459] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [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: 12/31/2022]
Abstract
Epigenetic alterations and the resulting inactivation of tumor suppressor genes often contribute to the development of various cancers. To identify novel candidates that may be silenced by aberrant methylation in esophageal squamous-cell carcinoma (ESCC), we analysed ESCC cell lines by a recently developed method known as bacterial artificial chromosome array-based methylated CpG island amplification (BAMCA), and selected candidates through BAMCA-assisted strategy. In the course of this program, we identified frequent CpG methylation-dependent silencing of the gene encoding cellular retinoic acid binding protein 1 (CRABP1) in our panel of ESCC cell lines. Expression of CRABP1 mRNA was restored in gene-silenced ESCC cells after treatment with 5-aza 2'-deoxycytidine. The DNA methylation status of the CRABP1 CpG island with clear promoter activity correlated inversely with expression of this gene. CpG methylation of CRABP1 was frequently observed in primary ESCC tissues as well. Restoration of CRABP1 expression in ESCC cells lacking the protein reduced cell growth by inducing arrest at G(0)-G(1), whereas knockdown of the gene in cells expressing CRABP1 promoted cell growth. Among 113 primary ESCC tumors, the absence of immunoreactive CRABP1 was significantly associated with de-differentiation of cancer cells and with distant lymph-node metastases in the patients. These results indicate that CRABP1 appears to have a tumor-suppressor function in esophageal epithelium, and its epigenetic silencing may play a pivotal role during esophageal carcinogenesis. Its expression status in biopsies or resected tumors might serve as an index for identifying ESCC patients for whom combined therapeutic modalities would be recommended.
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MESH Headings
- Azacitidine/pharmacology
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Carcinoma, Squamous Cell/genetics
- Carcinoma, Squamous Cell/metabolism
- Carcinoma, Squamous Cell/pathology
- Cell Differentiation
- Cell Proliferation
- DNA Methylation
- Epigenesis, Genetic
- Esophageal Neoplasms/genetics
- Esophageal Neoplasms/metabolism
- Esophageal Neoplasms/pathology
- Female
- Gene Expression Regulation, Neoplastic
- Gene Silencing
- Humans
- Lymphatic Metastasis/pathology
- Male
- Middle Aged
- Promoter Regions, Genetic
- Receptors, Retinoic Acid/genetics
- Receptors, Retinoic Acid/metabolism
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Affiliation(s)
- K Tanaka
- Department of Molecular Cytogenetics, Medical Research Institute and School of Biomedical Science, Tokyo Medical and Dental University, Tokyo, Japan
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Ota H, Tokunaga E, Chang K, Hikasa M, Iijima K, Eto M, Kozaki K, Akishita M, Ouchi Y, Kaneki M. Sirt1 inhibitor, Sirtinol, induces senescence-like growth arrest with attenuated Ras-MAPK signaling in human cancer cells. Oncogene 2006; 25:176-85. [PMID: 16170353 DOI: 10.1038/sj.onc.1209049] [Citation(s) in RCA: 342] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The induction of senescence-like growth arrest has emerged as a putative contributor to the anticancer effects of chemotherapeutic agents. Clinical trials are underway to evaluate the efficacy of inhibitors for class I and II histone deacetylases to treat malignancies. However, a potential antiproliferative effect of inhibitor for Sirt1, which is an NAD(+)-dependent deacetylase and belongs to class III histone deacetylases, has not yet been explored. Here, we show that Sirt1 inhibitor, Sirtinol, induced senescence-like growth arrest characterized by induction of senescence-associated beta-galactosidase activity and increased expression of plasminogen activator inhibitor 1 in human breast cancer MCF-7 cells and lung cancer H1299 cells. Sirtinol-induced senescence-like growth arrest was accompanied by impaired activation of mitogen-activated protein kinase (MAPK) pathways, namely, extracellular-regulated protein kinase, c-jun N-terminal kinase and p38 MAPK, in response to epidermal growth factor (EGF) and insulin-like growth factor-I (IGF-I). Active Ras was reduced in Sirtinol-treated senescent cells compared with untreated cells. However, tyrosine phosphorylation of the receptors for EGF and IGF-I and Akt/PKB activation were unaltered by Sirtinol treatment. These results suggest that inhibitors for Sirt1 may have anticancer potential, and that impaired activation of Ras-MAPK pathway might take part in a senescence-like growth arrest program induced by Sirtinol.
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Affiliation(s)
- H Ota
- Department of Anesthesia & Critical Care, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
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17
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Ueda M, Egawa H, Ogawa K, Uryuhara K, Fujimoto Y, Kasahara M, Ogura Y, Kozaki K, Takada Y, Tanaka K. Portal vein complications in the long-term course after pediatric living donor liver transplantation. Transplant Proc 2005; 37:1138-40. [PMID: 15848648 DOI: 10.1016/j.transproceed.2005.01.044] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The frequency and the outcome of patients with portal vein (PV) complications in the long-term course after pediatric living donor liver transplantation (LDLT) have rarely been reported. Between June 1990 and September 2003, 527 pediatric patients underwent primary LDLT with left lobe grafts, among which 479 patients with functioning grafts at 3 months after LDLT were included in this analysis. The ages ranged from 29 days to 17 years, 3 months (median: 1 year, 9 months) and body weight from 3.1 kg to 62.4 kg (median: 9.6 kg). Biliary cirrhosis was the most common cause for LDLT (81%). The PV was anastomosed with or without a vein graft. Thirty-nine patients (8%) showed a PV complication (stenosis: 16; obstruction: 17; thrombus: 2; twist: 3). Their ages ranged from 4 months to 17 years, 3 months (median: 1 year) and their body weight from 3.8 kg to 44.8 kg (median: 8.5 kg) at operation. PV complications were detected between 4 and 116 months (median: 14 months) after the transplant. Splenomegaly and decreased platelet counts were observed in more than 90% of the patients with a PV complication. In 27 patients (71%), interventional venoplasty was successful. Eleven patients had obstruction of the PV (2.3%) including three who showed cirrhosis; one with severe pulmonary hypertension; one death after retransplantation; and one alive after retransplantation. Moderate fibrosis was found in two patients at 3 and 2 years after the procedure, one of whom had the complication of a moderate intrapulmonary shunt. Early detection of PV stenosis with these two markers can lead to successful angioplasty and avoid graft loss.
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Affiliation(s)
- M Ueda
- Department of Transplantation Immunology, Kyoto University Faculty of Medicine, Kyoto University, Kyoto, Japan.
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18
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Akita Y, Kozaki K, Nakagawa A, Saito T, Ito S, Tamada Y, Fujiwara S, Nishikawa N, Uchida K, Yoshikawa K, Noguchi T, Miyaishi O, Shimozato K, Saga S, Matsumoto Y. Cyclooxygenase-2 is a possible target of treatment approach in conjunction with photodynamic therapy for various disorders in skin and oral cavity. Br J Dermatol 2004; 151:472-80. [PMID: 15327557 DOI: 10.1111/j.1365-2133.2004.06053.x] [Citation(s) in RCA: 40] [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: 01/13/2023]
Abstract
BACKGROUND Anti-cancer effects of cyclooxygenase (COX)-2 inhibitors have been reported, but not fully investigated in skin and oral diseases. 5-aminolaevulinic acid (ALA)-based photodynamic therapy (PDT) for treating those patients with skin and oral lesions is a highly sophisticated procedure, but the incidence of disease recurrence after treatment is rather significant. OBJECTIVE To confirm that COX-2 could be a molecular target in adjunctive therapy to ALA-based PDT, we investigated (i) COX-2 expression in various skin and oral diseases, and (ii) the inhibitory effects on cellular growth of COX-2 selective inhibitor (nimesulide), ALA-based PDT and their combination on human oral squamous cell carcinoma (SCC) cell lines. METHODS A total of 129 biopsy samples from the skin and oral mucosal lesions were tested immunohistochemically for COX-2 expression. Then the in vitro effects of nimesulide, ALA-based PDT, and their combination were determined on two SCC cell lines, HSC-2 and HSC-4. Three different methods (MTT assay, double-staining for annexin V and propidium iodide, caspase-3/CPP32 fluorometric protease assay) were applied for evaluation of their inhibitory effects on these two cell lines. RESULTS Among the skin diseases, a considerable number of COX-2 high expressers were found in actinic keratosis (15 of 25, 60%), Bowen's disease (13 of 17, 76%) and extramammary Paget's disease (15 of 15, 100%). In contrast, only one of 33 (3%) basal cell carcinoma tumours was a COX-2 high expresser. Among the oral mucosal biopsies, the proportion of COX-2 high expressers increased gradually from hyperplasia (one of six, 17%) through mild dysplasia (five of eight, 63%) and moderate dysplasia (20 of 23, 87%) to severe dysplasia (two of two, 100%). Nimesulide had an inhibitory effect in vitro on HSC-2 (proven to be a COX-2 high expresser), but not on HSC-4 (a COX-2 non-expresser). While ALA-based PDT showed an inhibitory effect on both HSC-2 and HSC-4, most importantly the combination of nimesulide and ALA-based PDT demonstrated a significant synergistic effect on the cellular growth inhibition of only HSC-2, but not of HSC-4. CONCLUSIONS Our study strongly suggests that COX-2 can be one of the molecular targets in treating various skin and oral diseases. The results from our in vitro experiments also prompt us to develop a new protocol with a combination of COX-2 selective inhibitor and ALA-based PDT for more effective treatment of those diseases.
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Affiliation(s)
- Y Akita
- Department of Pathology, Aichi Medical University School of Medicine, Nagakute, Aichi 480-1195, Japan
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19
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Kasahara M, Uryuhara K, Kaihara S, Kozaki K, Fujimoto Y, Ogura Y, Ogawa K, Oike F, Ueda M, Egawa H, Tanaka K. Monosegmental living donor liver transplantation. Transplant Proc 2003; 35:1425-6. [PMID: 12826178 DOI: 10.1016/s0041-1345(03)00445-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND Living donor liver transplant (LDLT) program has been started from 1990 in Japan, and is still major form of liver transplantation because of the scarcity of cadaveric donor organs. In small infants, implantation of left lateral segment grafts can be a problem because of a large-for-size graft. Until November 2002, we performed 867 transplants for 828 patients (561 children and 306 adults), and 14 cases received monosegment grafts from living donors. METHODS Fifteen patients, median age 211 days, median weights 5.95 kg, received monosegmental LDLT. The indication for using this technique was infants with an estimated graft-to-recipient weight ratio of over 4.0%. RESULTS Graft and patient survival is 85.7%. There were no differences in donor operation time and blood loss between monosegmentectomy and left lateral segmentectomy. Segment III grafts were indicated in 13 cases. Two vascular complications were observed (one hepatic artery thrombosis and one portal vein thrombosis). CONCLUSIONS Monosegental living donor liver transplantation is a feasible option with satisfactory graft survival in small babies with liver failure.
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Affiliation(s)
- M Kasahara
- Department of Transplant Surgery, Kyoto University Hospital, Kyoto, Japan.
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20
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Ohike Y, Hashimoto M, Kozaki K, Ako J, Iijima K, Watanabe T, Kojima T, Ouchi Y. 1P-0155 Prognostic significance of flow-mediated dilatation for fatal and nonfatal vascular events in elderly diabetics. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90229-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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21
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Watanabe T, Akishita M, Nakaoka T, Miyahara Y, Aburatani H, Yoshizumi M, Kozaki K, Ouchi Y. 3P-0669 Identification of estrogen-regulated genes in vascular smooth muscle cells. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90888-9] [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: 11/16/2022]
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22
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Iwamoto H, Kozaki K, Nakamura N, Hama K, Narumi K, Matsuno N, Kuzuoka K, Taira S, Kihara Y, Uchiyama M, Takeuchi H, Nagao T. Beneficial effects of pentoxifylline and propentofylline on the warm ischemic injury of rat livers. Transplant Proc 2002; 34:2677-8. [PMID: 12431571 DOI: 10.1016/s0041-1345(02)03372-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- H Iwamoto
- Fifth Department of Surgery, Hachioji Medical Center, Tokyo Medical University, Hachioji, Tokyo, Japan
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23
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Matsuno N, Uchiyama M, Iwamoto H, Hama K, Narumi Y, Kikuchi K, Degawa H, Kozaki K, Nagao T. Machine perfusion preservation for liver transplantation from non-heart-beating donors with agonal stage. Transplant Proc 2002; 34:2610-1. [PMID: 12431543 DOI: 10.1016/s0041-1345(02)03444-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- N Matsuno
- 5th Department of Surgery, Tokyo Medical University, Hachioji, Tokyo, Japan
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24
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Kozaki K, Sakurai E, Nagao T, Kozaki M. Usefulness of continuous hypothermic perfusion preservation in renal transplantation from non-heart-beating donors. Transplant Proc 2002; 34:2592-7. [PMID: 12431537 DOI: 10.1016/s0041-1345(02)03438-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- K Kozaki
- Department of Tranplantation and Immunology, Kyoto University, Kyoto, Japan
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25
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Kiuchi T, Uemoto S, Egawa H, Kaihara S, Oike F, Yokoi A, Ogura Y, Kasahara M, Fujimoto Y, Kozaki K, Tanaka K. Living donor liver transplantation in Kyoto, 2001. Clin Transpl 2002:195-201. [PMID: 12211783] [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: 02/26/2023]
Abstract
The living-donor liver transplant program at Kyoto University Hospital entered its 12th year in 2001. The rapid increase in adult patients that occurred with active use of right hemi-liver grafts is now reaching its plateau, limited by OR facilities and bed capacity. Graft selection is now being polarized to the left lateral section and right hemi-liver, and disease indications are becoming more similar to those for Western cadaveric programs, including a program for hepatocellular carcinoma. With the active introduction of right hemi-liver grafts, donor selection requires more multifactorial attention. Although most anatomical variants are managed surgically without significant risk, small-for-size grafts combined with high-risk patients are often a continuing problem even with the use of right hemi-liver grafts. Solutions for small-for-size syndrome with or without persistent portal hypertension and massive ascites are urgent targets of research. It will take some more time in Japan until the final establishment of a mutual compensatory system between cadaveric and living donor programs covering medical and socioeconomical aspects is achieved.
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Affiliation(s)
- T Kiuchi
- Department of Transplant Surgery, Organ Transplant Unit, Kyoto University Hospital, Kyoto, Japan
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26
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Furuta Y, Takahashi K, Fukuda Y, Kuno M, Kamiyama T, Kozaki K, Nomura N, Egawa H, Minami S, Watanabe Y, Narita H, Shiraki K. In vitro and in vivo activities of anti-influenza virus compound T-705. Antimicrob Agents Chemother 2002; 46:977-81. [PMID: 11897578 PMCID: PMC127093 DOI: 10.1128/aac.46.4.977-981.2002] [Citation(s) in RCA: 358] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
T-705 (6-fluoro-3-hydroxy-2-pyrazinecarboxamide) has been found to have potent and selective inhibitory activity against influenza virus. In an in vitro plaque reduction assay, T-705 showed potent inhibitory activity against influenza A, B, and C viruses, with 50% inhibitory concentrations (IC(50)s) of 0.013 to 0.48 microg/ml, while it showed no cytotoxicity at concentrations up to 1,000 microg/ml in Madin-Darby canine kidney cells. The selectivity index for influenza virus was more than 2,000. It was also active against a neuraminidase inhibitor-resistant virus and some amantadine-resistant viruses. T-705 showed weak activity against non-influenza virus RNA viruses, with the IC(50)s being higher for non-influenza virus RNA viruses than for influenza virus, and it had no activity against DNA viruses. Orally administered T-705 at 100 mg/kg of body weight/day (four times a day) for 5 days significantly reduced the mean pulmonary virus yields and the rate of mortality in mice infected with influenza virus A/PR/8/34 (3 x 10(2) PFU). These results suggest that T-705 may be a compound that is useful and highly selective against influenza virus infections and that has a mode of action different from those of commercially available drugs, such as amantadine, rimantadine, and neuraminidase inhibitors.
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Affiliation(s)
- Y Furuta
- Research Laboratories, Toyama Chemical Co., Ltd., 2-4-1 Shimookui, Toyama, Japan.
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27
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Lunevicius R, Nakanishi H, Ito S, Kozaki K, Kato T, Tatematsu M, Yasui K. Clinicopathological significance of fibrotic capsule formation around liver metastasis from colorectal cancer. J Cancer Res Clin Oncol 2001; 127:193-9. [PMID: 11260865 DOI: 10.1007/s004320000199] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.1] [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: 10/27/2022]
Abstract
PURPOSE The fibrous capsule around hepatocellular carcinoma is well known to be an indicator of a good prognosis. However, the fibrotic stromal response in the liver to a metastatic tumor remains unclear. PATIENTS AND METHODS In order to clarify the prevalence of fibrotic capsular formation around liver metastases as well as the prognostic and biological significance of the fibrotic capsule, 69 colorectal cancer patients, who underwent radical hepatectomy due to liver metastases, were investigated using immunohistochemical methods. RESULTS Encapsulated metastases as defined by a thick fibrotic band surrounding the entire surface of a metastasis were detected in 20% of the cases. The rate of initial recurrence in the remnant liver, which is a strong indicator for poor prognosis of colorectal liver metastasis, was significantly lower in the encapsulated metastasis group as compared with the non-encapsulated metastasis group. Proliferating fibroblastic cells in the capsule were myofibroblasts positively stained for alpha-smooth muscle actin (alpha-SMA) and they deposited dense extracellular matrices rich in collagen Type 1 in the layer of the inner half and secreted MMP-1, MMP-2, and TIMP-1 in the layer of the outer half of the capsule. Activation of alpha-SMA positive hepatic stellate cells (HSC) was also observed in the liver parenchyma adjacent to metastases. CONCLUSIONS The results indicate that fibrotic capsular formation is associated with a lower rate of initial local recurrence in the remnant liver, and that the capsule may serve as a mechanical and chemical barrier to local invasion by metastatic tumor cells. Proliferating stromal cells in the capsule are myofibroblasts, probably derived from HSC activated by colorectal liver metastasis in the liver parenchyma.
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Affiliation(s)
- R Lunevicius
- Department of Gastroenterological Surgery, Aichi Cancer Center Hospital, Chikusa-ku, Nagoya 464-8681, Japan
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28
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Matsuno N, Ikeda T, Ikeda K, Hama K, Iwamoto H, Uchiyama M, Kozaki K, Narumi Y, Kikuchi K, Degawa H, Nagao T. Changes of cytokines in direct endotoxin adsorption treatment on postoperative multiple organ failure. Ther Apher 2001; 5:36-9. [PMID: 11258608 DOI: 10.1046/j.1526-0968.2001.005001036.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Multiple organ failure (MOF) is a serious condition that involves simultaneous or consecutive functional failure of several important organs. Furthermore, sepsis is known to play an important role in the occurrence of MOF. Hemoadsorption therapy with the endotoxin adsorption column containing polymyxin B immobilized fibers by direct hemoperfusion (PMX-DHP) is reportedly effective in the treatment of septic shock. This study examined the changes induced on cytokines upon PMX-DHP treatment in 25 patients who underwent emergency abdominal surgery and were immediately started on a postoperative regimen of continuous hemodiafiltration (CHDF) and PMX-DHP. Postoperative MOF was observed in these patients with a mean APACHE II SCORE of 25.5. Eighty percent of patients survived for more than 1 month. We were able to reduce the necessary dose of dopamine in 85.7% of patients because hemodynamic stability improved after administration of PMX-DHP. Interleukin 6 blood levels did not change significantly before or after PMX-DHP treatment in either the surviving or nonsurviving patients. Blood interleukin 1 receptor antagonist levels decreased in both groups. Intercellular adhesion molecular-1, NOx, and thrombomodulin did not change significantly during the course of treatment in either group. Decreased blood levels of PAI-1 levels were found in the surviving patients whereas increased levels of PAI-1 were found in the non-surviving patients. In conclusion, PMX-DHP treatment may be limited clinically in its ability to remove inflammatory cytokines and humoral mediators. However, PMX-DHP treatment is useful for hemodynamic stabilization, which prevents development of MOF.
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Affiliation(s)
- N Matsuno
- Fifth Department of Surgery, Hachioji Medical Center, Tokyo Medical University, Hachioji-City, Japan
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29
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Koizumi K, Kakiuchi H, Saguchi T, Inoue S, Fuse S, Kawakami E, Yamazaki A, Kozaki K, Nagao T. A simple objective parameter for perfusion study of renal transplant. Ann Nucl Med 2001; 15:27-32. [PMID: 11355778 DOI: 10.1007/bf03012127] [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: 10/21/2022]
Abstract
We proposed a simple parameter, the kidney-to-aorta ratio (KAR), for evaluation of renal transplant perfusion. KAR was calculated from the peak counts of the kidney and the aorta. The calculated values were compared with the visual interpretation of the radionuclide first-pass flow study, percent renal uptake (%RU), and tubular extraction rate (TER) by Bubeck's one point sampling method in 37 studies. KAR correlated well with the visual interpretation of the flow study and the other quantitative parameters. Representative cases, which showed the usefulness of KAR for the objective assessment of the perfusion status of renal transplants, were presented. In conclusion, KAR is a simple and practically useful parameter for objective evaluation and follow-up of renal transplant perfusion.
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Affiliation(s)
- K Koizumi
- Department of Radiology, Hachioji Medical Center, Tokyo Medical University, Japan.
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30
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Uchiyama M, Matsuno N, Hama K, Iwamoto H, Narumi Y, Kikuchi K, Degawa H, Kozaki K, Kubota K, Takeuchi H, Sakurai E, Asuwa N, Masuda Toshihiko Hirano S, Nagao T. Comparison between nonpulsatile and pulsatile machine perfusion preservation in liver transplantation from non-heart-beating donors. Transplant Proc 2001; 33:936-8. [PMID: 11267136 DOI: 10.1016/s0041-1345(00)02276-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- M Uchiyama
- Department of Fifth Surgery, Pathology, Hachioji Medical Center of Tokyo Medical University, Tokyo, Japan
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31
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Masuda A, Osada H, Yatabe Y, Kozaki K, Tatematsu Y, Takahashi T, Hida T, Takahashi T, Takahashi T. Protective function of p27(KIP1) against apoptosis in small cell lung cancer cells in unfavorable microenvironments. Am J Pathol 2001; 158:87-96. [PMID: 11141482 PMCID: PMC1850277 DOI: 10.1016/s0002-9440(10)63947-8] [Citation(s) in RCA: 24] [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] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A previous study of ours unexpectedly found that in contrast to frequent reductions in non-small cell lung cancer, high expression of the p27(KIP1) cyclin-dependent kinase (CDK) inhibitor was retained in virtually all small cell lung cancers (SCLCs), suggesting the possibility of high expression of nonfunctional p27(KIP1) in this virulent tumor. The study presented here, however, shows that p27(KIP1) in SCLC biochemically functions as a CDK inhibitor, clearly showing induction apparently associated with G(1)/G(0) arrest and efficient binding to and inhibition of the cyclin E-CDK2 complex. Interestingly, induction of p27(KIP1) seems to confer on SCLC cells the ability to survive under culture conditions unfavorable for cell growth such as a lack of nutrients and hypoxia. Subsequent experiments manipulating p27(KIP1) levels by using a sense p27(KIP1) expression construct or an antisense oligonucleotide supported this notion. These observations suggest that high expression of p27(KIP1) in vivo may favor the survival of SCLC by preventing apoptosis in a microenvironment unfavorable for cell proliferation.
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Affiliation(s)
- A Masuda
- Divisions of Molecular Oncology and Immunology, Aichi Cancer Center Research Institute, Nagoya, Japan
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32
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Iwamoto H, Matsuno N, Narumi Y, Uchiyama M, Kozaki K, Degawa H, Hama K, Kikuchi K, Takeuchi H, Kozaki M, Nagao T. Beneficial effect of machine perfusion preservation on liver transplantation from non-heart-beating donors. Transplant Proc 2000; 32:1645-6. [PMID: 11119873 DOI: 10.1016/s0041-1345(00)01437-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- H Iwamoto
- Fifth Department of Surgery, Hachioji Medical Center, Tokyo Medical University, Tokyo, Japan
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33
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Degawa H, Matsuno N, Iwamoto H, Hama K, Nakamura Y, Narumi Y, Kikuchi K, Uchiyama M, Kozaki K, Nagao T. Primary nonfunctioning grafts in cadaveric kidney transplantation. Transplant Proc 2000; 32:1903-4. [PMID: 11119993 DOI: 10.1016/s0041-1345(00)01485-8] [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: 11/23/2022]
Affiliation(s)
- H Degawa
- 5th Surgical Department, Hachioji Medical Center, Tokyo Medical University, Tokyo, Japan
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34
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Kikuchi K, Narumi Y, Hama K, Iwamoto H, Uchiyama M, Kozaki K, Degawa H, Matsuno N, Kozaki M, Nagao T. Kidney transplantation from spousal donors. Transplant Proc 2000; 32:1817-8. [PMID: 11119951 DOI: 10.1016/s0041-1345(00)01359-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- K Kikuchi
- 5th Department of Surgery, Hachioji Medical Center, Tokyo Medical University, Tokyo, Japan
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35
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Watanabe T, Akishita M, Toba K, Kozaki K, Eto M, Sugimoto N, Kiuchi T, Hashimoto M, Shirakawa W, Ouchi Y. Influence of sex and age on serum nitrite/nitrate concentration in healthy subjects. Clin Chim Acta 2000; 301:169-79. [PMID: 11020471 DOI: 10.1016/s0009-8981(00)00340-5] [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: 11/18/2022]
Abstract
Measurement of serum nitrite/nitrate (NOx) concentrations has been considered useful to estimate nitric oxide production in humans. However little is known about the physiologic range and the factors affecting serum NOx levels. The aim of this study was, thus, to investigate the influence of sex and age on serum NOx levels in healthy subjects. We selected 263 healthy subjects (118 women and 145 men, 20-69 y) from 505 consecutive subjects who received annual medical checkups at our hospital. Serum NOx levels were determined using an analyzer employing the Griess method. The linear regression analysis showed that NOx increased significantly according to age in women (r=0.22, P<0.05), but did not in men (P=NS). Women of the younger age group (<40 y) showed significantly lower NOx levels than men of the same age group (P<0.05), whereas there was no significant difference between men and women of the older age (> or =40 y). Then, to investigate whether menopause affects serum NOx levels, middle aged women (46-55 y) were selected. Multiple logistic regression analysis showed that menopause was an independent factor for increased serum NOx levels in middle aged women (r=0.4, P<0.05). These results suggest that the serum NOx concentration is affected by age in healthy women, possibly depending on menopausal state.
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Affiliation(s)
- T Watanabe
- Department of Geriatric Medicine, Graduate School of Medicine, University of Tokyo, Tokyo 113-8655, Japan
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36
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Ishikawa M, Akishita M, Kozaki K, Toba K, Namiki A, Yamaguchi T, Orimo H, Ouchi Y. Expression of parathyroid hormone-related protein in human and experimental atherosclerotic lesions: functional role in arterial intimal thickening. Atherosclerosis 2000; 152:97-105. [PMID: 10996344 DOI: 10.1016/s0021-9150(99)00455-4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
We investigated the expression of parathyroid hormone-related protein (PTHrP) in atherosclerotic lesions and the role of PTHrP in the development of arterial neointima formation. Immunohistochemical staining of PTHrP in the neointima of rat aorta produced by balloon injury and of rat femoral artery produced by non-obstructive polyethylene cuff placement, and in the atherosclerotic lesion of human coronary artery was performed using anti-human PTHrP-(1-34) antibody. Anti-muscle actin antibody, HHF-35, and anti-macrophage antibody, HAM-56, were used to identify smooth muscle cells and macrophages, respectively. Immunoreactivity of PTHrP was detected in the thickened intima of rat and human lesions where the predominant cell types were smooth muscle cells or macrophages dependently on the lesion type. In the next series of experiments, we examined the effect of PTHrP on the development of cuff-induced intimal thickening of rat femoral artery. Either PTHrP-(1-34) or PTHrP-(7-34), a PTH/PTHrP receptor antagonist, suspended in pluronic F-127 gel was locally applied around the rat femoral artery. Intimal thickening induced by cuff placement was evaluated 2 weeks later. PTHrP-(1-34) dose-dependently inhibited intimal thickening determined as intima/media ratio and % stenosis whereas PTHrP-(7-34) dose-dependently enhanced that. These results suggest that PTHrP, which is expressed in atherosclerotic lesions, inhibits the development of neointimal formation.
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Affiliation(s)
- M Ishikawa
- Department of Geriatric Medicine, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8655, Tokyo, Japan
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37
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Abstract
A novel PCR method using confronting two-pair primers, named PCR-CTPP, is introduced to detect a single nucleotide polymorphism (base X or Y). One primer for the X allele is set to include X' at the 3' end (antisense), where X' is the antisense of X, with the counterpart sense primer upstream. For the Y allele, a sense primer including Y at the 3' end is set, with the antisense primer downstream. One common band and one specific band for each allele are amplified, which allows genotyping directly by electrophoresis. This method is exemplified by application to the polymorphisms of beta-adrenoceptor 2 and interleukin 1B. It is simpler than PCR-RFLP (restriction fragment length polymorphism), which requires incubation with a restriction enzyme, and is suitable for genotyping in studies of genetic epidemiology involving hundreds of samples.
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Affiliation(s)
- N Hamajima
- Division of Epidemiology and Prevention, Aichi Cancer Center Research Institute, Chikusa-ku, Nagoya 464-8681, Japan.
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38
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Hirano T, Oka K, Takeuchi H, Sakurai E, Kozaki K, Matsuno N, Kozaki M, Nagao T. A comparison of prednisolone and methylprednisolone for renal transplantation. Clin Transplant 2000; 14:323-8. [PMID: 10945203 DOI: 10.1034/j.1399-0012.2000.140408.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A large difference in immunosuppressive potency between methylprednisolone and prednisolone has been suggested in vitro. However, the selection of the best glucocorticoid for renal transplantation has been seldom considered so far. Thus, the present study was undertaken to compare therapeutic efficacy between prednisolone and methylprednisolone in renal transplantation. We studied 42 renal transplant recipients who were operated on between 1990 and 1994. The patients were divided into two treatment groups: a methylprednisolone/ cyclosporine group (n = 19) and a prednisolone/cyclosporine group (n = 23). Clinical outcome and drug side effects were compared retrospectively between the treatment groups 24-84 months after transplantation. The overall graft survival time in patients treated with methylprednisolone/cyclosporine was superior to that in patients treated with prednisolone/cyclosporine (p < 0.05). Among the recipients from cadaver donors, 5/16 (31.3%) treated with prednisolone required nephrectomy, whereas none of the 10 patients treated with methylprednisolone received nephrectomy (p < 0.01). An examination of the recipients from living related donors revealed that serum creatinine levels 24-36 months after operation were significantly lower in the methylprednisolone group (p < 0.05). Cyclosporine trough levels and glucocorticoid side effects were similar between the treatment groups. The results raised the possibility that methylprednisolone is superior to prednisolone when combined with cyclosporine for maintenance immunosuppressive therapy in renal transplantation.
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Affiliation(s)
- T Hirano
- Department of Clinical Pharmacology, School of Pharmacy, Tokyo University of Pharmacy and Life Science, Hachioji, Japan.
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39
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Hashimoto M, Akishita M, Eto M, Kozaki K, Iijima K, Ako J, Kim S, Toba K, Yoshizumi M, Ouchi Y. Association of coronary risk factors and early stage of atherosclerosis in men. Atherosclerosis 2000. [DOI: 10.1016/s0021-9150(00)80113-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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40
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Raines E, Kozaki K, Tang J, Kaminski W, Lindahl P, Martin P, Ross R, Betsholtz C. Elimiation of PDGF-B from only the circulating cells of APOE −/− mice significantly impacts atherosclerotic lesion formation. Atherosclerosis 2000. [DOI: 10.1016/s0021-9150(00)80031-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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41
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Kozaki K, Miyaishi O, Tsukamoto T, Tatematsu Y, Hida T, Takahashi T, Takahashi T. Establishment and characterization of a human lung cancer cell line NCI-H460-LNM35 with consistent lymphogenous metastasis via both subcutaneous and orthotopic propagation. Cancer Res 2000; 60:2535-40. [PMID: 10811136] [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: 02/16/2023]
Abstract
Lymphogenous metastasis is a common feature of human lung cancers, but very little is known about the underlying mechanism. In the present study, in vivo selection was carried out to obtain a highly lymphogenous metastatic subline of a human large cell carcinoma of the lung, NCI-H460. The resulting subline, termed NCI-H460-LNM35 (LNM35), was shown to metastasize to regional lymph nodes with a 100% incidence not only as a result of orthotopic intrabronchial (i.b.) implantation, but also as a result of conventional s.c. implantation. LNM35 has a short latency period, allowing for the collection of experimental data within 28 days after i.b. inoculation and 45 days after s.c. inoculation. It was noted that orthotopically i.b.-propagated LNM35 closely mimicked the clinical manifestations of human lung cancer patients by infiltrating into lymphatic vessels and metastasizing to the mediastinal lymph nodes. The LNM35 cell line is, to the best of our knowledge, the first human lung cancer cell line to be reported as having lymphogenous metastatic properties, and the observed 100% incidence by s.c. inoculation gives LNM35 a significant advantage even over previously reported human cancer cell lines of other origins. Comparisons between LNM35 and its parental NCI-H460 cell lines were also made with regard to expression levels and/or activities of various molecules that are thought to play a part in the metastatic process. We show here that the expression of cyclooxygenase 2 is increased in LNM35 and that a specific cyclooxygenase 2 inhibitor, nimesulide, can inhibit the invasion of LNM35 in vitro through Matrigel containing basement membrane components.
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Affiliation(s)
- K Kozaki
- Pathophysiology Unit, Aichi Cancer Center Research Institute, Nagoya, Japan
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42
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Hida T, Kozaki K, Muramatsu H, Masuda A, Shimizu S, Mitsudomi T, Sugiura T, Ogawa M, Takahashi T. Cyclooxygenase-2 inhibitor induces apoptosis and enhances cytotoxicity of various anticancer agents in non-small cell lung cancer cell lines. Clin Cancer Res 2000; 6:2006-11. [PMID: 10815926] [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: 02/16/2023]
Abstract
In recent years, a combination of two demographic phenomena, an increase in the number of older people in the population and an increase in the incidence of lung cancer with age, has made it mandatory to develop therapeutic modalities with less toxicity for the treatment of inoperable elderly patients with lung cancer. Our study shows that a cyclooxygenase (COX)-2 inhibitor, nimesulide, can inhibit proliferation of non-small cell lung cancer cell lines in vitro in a dose-dependent manner, in part by inducing apoptosis even at clinically achievable low concentrations. Our observations also suggest that the responsiveness of non-small cell lung cancer to COX-2 inhibitors does not require the presence of wild-type p53, but may be influenced by the degree of COX-2 expression. In addition, we found that nimesulide, when used in combination at clinically achievable concentrations, reduced the IC50 values of various anticancer agents by up to 77%, although the level of reduction varied considerably. Because our previous studies have indicated a significantly increased COX-2 expression in up to 70% of adenocarcinoma cases, the present findings are of great clinical interest. In conjunction with the recent development of next generation, highly selective COX-2 inhibitors, they can be expected to lead to even greater efficacy of their use as adjuncts to various anticancer agents for the treatment of high-risk patients without compromising their quality of life.
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Affiliation(s)
- T Hida
- Department of Internal Medicine, Aichi Cancer Center Hospital, Aichi Cancer Center Research Institute, Nagoya, Japan
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43
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Hashimoto M, Kozaki K, Eto M, Akishita M, Ako J, Iijima K, Kim S, Toba K, Yoshizumi M, Ouchi Y. Association of coronary risk factors and endothelium-dependent flow-mediated dilatation of the brachial artery. Hypertens Res 2000; 23:233-8. [PMID: 10821132 DOI: 10.1291/hypres.23.233] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.4] [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: 11/15/2022]
Abstract
Impaired endothelial function has been reported to be the initial step in atherosclerosis. Some coronary risk factors independently relate to impaired endothelial function. However, few studies have examined the association between coronary risk factors and endothelial function in patients who have multiple risk factors without clinical atherosclerosis. This study was undertaken to elucidate the relationship between accumulation of coronary risk factors and vascular endothelial dysfunction. We examined 101 subjects with one or more coronary risk factors 56.8 +/- 1.0 years old and 40 age-matched control subjects without coronary risk factors. We measured brachial artery diameter non-invasively using a 7.5-MHz ultrasound machine at rest, during reactive hyperemia caused by endothelium-dependent vasodilatation, and after sublingual administration of nitroglycerin, which causes endothelium-independent vasodilatation. The percentage change in flow-mediated diameter (%FMD; deltaD/D x 100), in subjects with one or more coronary risk factors was significantly lower than that in control subjects(4.8 +/- 0.3% vs. 6.7 +/- 0.5%, p < 0.01). Endothelium-independent vasodilatation by nitroglycerin did not differ between the two groups. Endothelial function was impaired according to the accumulation of coronary risk factors. On multiple regression analysis, the number of risk factors, age, and brachial artery diameter at rest showed significant correlation with %FMD. Our results suggest that an accumulation of coronary risk factors was significantly related to impairment of endothelial function.
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Affiliation(s)
- M Hashimoto
- Department of Geriatric Medicine, Graduate School of Medicine, University of Tokyo, Japan
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44
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Kozaki K, Takeuchi H, Hirano T, Kozaki M, Nagao T. LYMPHOCYTE SENSITIVITIES TO CYCLOSPORINE IN THEIR CLINICAL SIGNIFICANCE ON RENAL TRANSPLANTATION. Transplantation 2000. [DOI: 10.1097/00007890-200004271-00439] [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: 11/25/2022]
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45
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Kozaki K, Sakurai E, Kubota K, Iwamoto H, Hama K, Narumi Y, Uchiyama M, Kikuchi K, Degawa H, Matsuno N, Kozaki M, Nagao T. Prediction of kidney nonfunction after transplantation with machine perfusion preservation. Transplant Proc 2000; 32:275-6. [PMID: 10715415 DOI: 10.1016/s0041-1345(99)00955-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- K Kozaki
- Fifth Department of Surgery, Hachioji Medical Center, Tokyo, Japan
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46
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Nagano K, Toba K, Akishita M, Watanabe T, Kozaki K, Eto M, Hashimoto M, Sudoh N, Ako J, Yoshizumi M, Ouchi Y. Prostanoids regulate proliferation of vascular smooth muscle cells induced by arginine vasopressin. Eur J Pharmacol 2000; 389:25-33. [PMID: 10686292 DOI: 10.1016/s0014-2999(99)00873-0] [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: 01/23/2023]
Abstract
The aim of the present study was to investigate the effect of arginine [Arg(8)]vasopressin (vasopressin) on proliferation of vascular smooth muscle cells and the mechanisms underlying the action of vasopressin. To clarify these issues, we used two different types of vascular smooth muscle cells, cultured adult rat aortic smooth muscle cells and A10 cells, a cell line derived from fetal rat aorta. Vasopressin (10(-8) to 10(-6) M) significantly stimulated the proliferation of rat aortic smooth muscle cells in a dose-dependent manner. In contrast, vasopressin significantly inhibited the proliferation of A10 cells. This inhibition was abolished when A10 cells were treated with indomethacin. Vasopressin stimulated the production of prostanoids several-fold in A10 cells but not in rat aortic smooth muscle cells. These effects were completely blocked by the vasopressin V(1) receptor antagonist, 1-¿1-[4-(3-acetylamino-propoxy)benzoyl]4-piperidyl¿-3, 4-dihydro-2(1H)-quinolinone (OPC21268), but not by the vasopressin V(2) receptor antagonist, (+/-)-5-dimethylamino-1-[4-(2-methylbenzoylamino)benzol]-2, 3,4,5-tetrahydro-1H-benzazepine hydrochloride (OPC31260). These results indicate that vasopressin has diverse effect on proliferation of vascular smooth muscle cells through the vasopressin V(1) receptor, depending on the production of growth regulatory prostanoids.
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MESH Headings
- 6-Ketoprostaglandin F1 alpha/biosynthesis
- 6-Ketoprostaglandin F1 alpha/physiology
- Animals
- Aorta, Thoracic
- Arginine Vasopressin/pharmacology
- Cell Division/drug effects
- Cell Line
- Cells, Cultured
- DNA/biosynthesis
- Dinoprostone/biosynthesis
- Dinoprostone/physiology
- Dose-Response Relationship, Drug
- Embryo, Mammalian
- Epoprostenol/biosynthesis
- Epoprostenol/physiology
- Male
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Prostaglandins/biosynthesis
- Prostaglandins/physiology
- Rats
- Thromboxane B2/biosynthesis
- Thromboxane B2/physiology
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Affiliation(s)
- K Nagano
- Department of Geriatric Medicine, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan
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47
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Kozaki K, Sakurai E, Uchiyama M, Matsuno N, Kozaki M, Nagao T. Usefulness of high-risk renal graft conditioning: functional improvement of high-risk grafts by addition of reagents to continuous hypothermic perfusion preservation solution. Transplant Proc 2000; 32:164-6. [PMID: 10701007 DOI: 10.1016/s0041-1345(99)00896-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- K Kozaki
- Fifth Department of Surgery, Hachioji Medical Center, Tokyo Medical University, Japan
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48
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Matsuno N, Kozaki K, Degawa H, Narumi Y, Suzuki N, Kikuchi K, Uchiyama M, Kubota K, Sakurai E, Kozaki M, Nagao T. A useful predictor in machine perfusion preservation for kidney transplantation from non-heart-beating donors. Transplant Proc 2000; 32:173-4. [PMID: 10701011 DOI: 10.1016/s0041-1345(99)00919-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- N Matsuno
- Fifth Department of Surgery, Hachioji Medical Center of Tokyo Medical University, Japan
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49
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Kozaki K, Sakurai E, Uchiyama M, Matsuno N, Kozaki M, Nagao T. Development of hypothermic continuous perfusion preservation machine equipped with nonpulsatile pump and its clinical application. Transplant Proc 2000; 32:5-9. [PMID: 10700944 DOI: 10.1016/s0041-1345(99)00852-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- K Kozaki
- Fifth Department of Surgery, Hachioji Medical Center, Tokyo Medical University, Japan
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50
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Hiwada K, Ogihara T, Matsumoto M, Matsuoka H, Takishita S, Shimamoto K, Toba K, Abe I, Kohara K, Morimoto S, Mikami H, Iwai K, Takasaki M, Kawano Y, Higashiura K, Kozaki K, Eto M, Fujishima M. Guidelines for hypertension in the elderly--1999 revised version. Ministry of Health and Welfare of Japan. Hypertens Res 1999; 22:231-59. [PMID: 10580391 DOI: 10.1291/hypres.22.231] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- K Hiwada
- Second Department of Internal Medicine, Ehime University School of Medicine, Japan
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