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Mitsunobu S, Ohashi Y, Makita H, Suzuki Y, Nozaki T, Ohigashi T, Ina T, Takaki Y. One-Year In Situ Incubation of Pyrite at the Deep Seafloor and Its Microbiological and Biogeochemical Characterizations. Appl Environ Microbiol 2021; 87:e0097721. [PMID: 34550782 PMCID: PMC8592575 DOI: 10.1128/aem.00977-21] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 09/04/2021] [Indexed: 11/20/2022] Open
Abstract
In this study, we performed a year-long in situ incubation experiment on a common ferrous sulfide (Fe-S) mineral, pyrite, at the oxidative deep seafloor in the hydrothermal vent field in the Izu-Bonin arc, Japan, and characterized its microbiological and biogeochemical properties to understand the microbial alteration processes of the pyrite, focusing on Fe(II) oxidation. The microbial community analysis of the incubated pyrite showed that the domain Bacteria heavily dominated over Archaea compared with that of the ambient seawater, and Alphaproteobacteria and Gammaproteobacteria distinctively codominated at the class level. The mineralogical characterization by surface-sensitive Fe X-ray absorption near-edge structure (XANES) analysis revealed that specific Fe(III) hydroxides (schwertmannite and ferrihydrite) were locally formed at the pyrite surface as the pyrite alteration products. Based on the Fe(III) hydroxide species and proportion, we thermodynamically calculated the pH value at the pyrite surface to be pH 4.9 to 5.7, indicating that the acidic condition derived from pyrite alteration was locally formed at the surface against neutral ambient seawater. This acidic microenvironment at the pyrite surface might explain the distinct microbial communities found in our pyrite samples. Also, the acidity at the pyrite surface indicates that the abiotic Fe(II) oxidation rate was much limited at the pyrite surface kinetically, 3.9 × 103- to 1.6 × 105-fold lower than that in the ambient seawater. Moreover, nanoscale characterization of microbial biomolecules using carbon near-edge X-ray absorption fine-structure (NEXAFS) analysis showed that the sessile cells attached to pyrite excreted the acidic polysaccharide-rich extracellular polymeric substances at the pyrite surface, which can lead to the promotion of biogenic Fe(II) oxidation and pyrite alteration. IMPORTANCE Pyrite is one of the most common Fe-S minerals found in submarine hydrothermal environments. Previous studies demonstrated that the Fe-S mineral can be a suitable host for Fe(II)-oxidizing microbes in hydrothermal environments; however, the details of microbial Fe(II) oxidation processes with Fe-S mineral alteration are not well known. The spectroscopic and thermodynamic examination in the present study suggests that a moderately acidic pH condition was locally formed at the pyrite surface during pyrite alteration at the seafloor due to proton releases with Fe(II) and sulfidic S oxidations. Following previous studies, the abiotic Fe(II) oxidation rate significantly decreases with a decrease in pH, but the biotic (microbial) Fe(II) oxidation rate is not sensitive to the pH decrease. Thus, our findings clearly suggest that the pyrite surface is a unique microenvironment where abiotic Fe(II) oxidation is limited and biotic Fe(II) oxidation is more prominent than that in neutral ambient seawater.
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Affiliation(s)
- S. Mitsunobu
- Graduate School of Agriculture, Ehime University, Matsuyama, Ehime, Japan
| | - Y. Ohashi
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka, Shizuoka, Japan
| | - H. Makita
- Department of Ocean Sciences, Tokyo University of Marine Science and Technology, Tokyo, Tokyo, Japan
- Institute for Extra-cutting-edge Science and Technology Avant-garde Research (X-star), Japan Agency for Marine-Earth Science & Technology (JAMSTEC), Yokosuka, Kanagawa, Japan
- Kanagawa Institute of Technology, Atsugi, Kanagawa, Japan
| | - Y. Suzuki
- Kanagawa Institute of Technology, Atsugi, Kanagawa, Japan
| | - T. Nozaki
- Research Institute for Marine Resources Utilization, Japan Agency for Marine-Earth Science & Technology (JAMSTEC), Yokosuka, Kanagawa, Japan
- Frontier Research Center for Energy and Resources, School of Engineering, The University of Tokyo, Tokyo, Tokyo, Japan
- Department of Planetology, Graduate School of Science, Kobe University, Kobe, Hyogo, Japan
- Ocean Resources Research Center for Next Generation, Chiba Institute of Technology, Narashino, Chiba, Japan
| | - T. Ohigashi
- UVSOR Facility, Institute for Molecular Science, Myodaiji, Okazaki, Japan
| | - T. Ina
- SPring-8, Japan Synchrotron Radiation Research Institute (JASRI), Sayo-gun, Hyogo, Japan
| | - Y. Takaki
- Institute for Extra-cutting-edge Science and Technology Avant-garde Research (X-star), Japan Agency for Marine-Earth Science & Technology (JAMSTEC), Yokosuka, Kanagawa, Japan
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Kim WJ, Gupta V, Nishimura M, Makita H, Idolor L, Roa C, Loh LC, Ong CK, Wang JS, Boonsawat W, Gunasekera KD, Madegedara D, Kuo HP, Wang CH, Wang C, Yang T, Lin YX, Ko FWS, Hui DSC, Lan LTT, Vu QTT, Bhome AB, Ng A, Seo JB, Lee BY, Lee JS, Oh YM, Lee SD. Identification of chronic obstructive pulmonary disease subgroups in 13 Asian cities. Int J Tuberc Lung Dis 2019; 22:820-826. [PMID: 29914609 DOI: 10.5588/ijtld.17.0524] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Chronic obstructive pulmonary disease (COPD) is a heterogeneous condition that can differ in its clinical manifestation, structural changes and response to treatment. OBJECTIVE To identify subgroups of COPD with distinct phenotypes, evaluate the distribution of phenotypes in four related regions and calculate the 1-year change in lung function and quality of life according to subgroup. METHODS Using clinical characteristics, we performed factor analysis and hierarchical cluster analysis in a cohort of 1676 COPD patients from 13 Asian cities. We compared the 1-year change in forced expiratory volume in one second (FEV1), modified Medical Research Council dyspnoea scale score, St George's Respiratory Questionnaire (SGRQ) score and exacerbations according to subgroup derived from cluster analysis. RESULTS Factor analysis revealed that body mass index, Charlson comorbidity index, SGRQ total score and FEV1 were principal factors. Using these four factors, cluster analysis identified three distinct subgroups with differing disease severity and symptoms. Among the three subgroups, patients in subgroup 2 (severe disease and more symptoms) had the most frequent exacerbations, most rapid FEV1 decline and greatest decline in SGRQ total score. CONCLUSION Three subgroups with differing severities and symptoms were identified in Asian COPD subjects.
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Affiliation(s)
- W J Kim
- Department of Internal Medicine, Kangwon National University, Chuncheon, Korea
| | - V Gupta
- Department of Internal Medicine, Kangwon National University, Chuncheon, Korea, Adesh Institute of Medical Sciences and Research, Bathinda, India
| | - M Nishimura
- Division of Respiratory Medicine, Department of Internal Medicine, Hokkaido University Hospital, Sapporo, Japan
| | - H Makita
- Division of Respiratory Medicine, Department of Internal Medicine, Hokkaido University Hospital, Sapporo, Japan
| | - L Idolor
- Section of Respiratory Services and Physical Therapy and Rehabilitation Lung Center of the Philippines, Quezon City
| | - C Roa
- College of Medicine and Philippine General Hospital, University of the Philippines, Manila, The Philippines
| | - L-C Loh
- Department of Medicine, Penang Medical College, Penang, Malaysia
| | - C-K Ong
- Department of Medicine, Penang Medical College, Penang, Malaysia
| | - J-S Wang
- Taipei Medical University, Taipei, Taiwan
| | - W Boonsawat
- Department of Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - K D Gunasekera
- Central Chest Clinic, National Hospital of Sri Lanka, Colombo
| | - D Madegedara
- Respiratory Disease Treatment Unit, Teaching Hospital Kandy, Kandy, Sri Lanka
| | - H-P Kuo
- Department of Thoracic Medicine, Chang Gung Memorial Hospital, Taipei, Taiwan
| | - C-H Wang
- Department of Thoracic Medicine, Chang Gung Memorial Hospital, Taipei, Taiwan
| | - C Wang
- Department of Respiratory and Critical Care Medicine, Beijing China-Japan Friendship Hospital, Beijing
| | - T Yang
- Department of Respiratory and Critical Care Medicine, Beijing China-Japan Friendship Hospital, Beijing
| | - Y-X Lin
- Beijing Institute of Respiratory Medicine, Department of Respiratory and Critical Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing
| | - F W S Ko
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong, China
| | - D S C Hui
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong, China
| | - L T T Lan
- Respiratory Care Center, University Medical Center, Ho Chi Minh City, Viet Nam
| | - Q T T Vu
- Respiratory Care Center, University Medical Center, Ho Chi Minh City, Viet Nam
| | - A B Bhome
- Indian Coalition of Obstructive Lung Diseases Network, Pune, Maharashtra, India
| | - A Ng
- Department of Respiratory and Critical Care Medicine, Tan Tock Seng Hospital, Singapore
| | - J B Seo
- Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul
| | - B Y Lee
- Division of Allergy and Respiratory Diseases, Soon Chun Hyang University Hospital, Seoul
| | - J S Lee
- Department of Pulmonary and Critical Care Medicine and Clinical Research Center for Chronic Obstructive Airway Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Y-M Oh
- Department of Pulmonary and Critical Care Medicine and Clinical Research Center for Chronic Obstructive Airway Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - S-D Lee
- Department of Pulmonary and Critical Care Medicine and Clinical Research Center for Chronic Obstructive Airway Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Kusumoto Y, Makita H, Nagai K, Yamane T. Recognition of roles of various professionals by home-visiting specialists. J Phys Ther Sci 2018; 30:800-803. [PMID: 29950767 PMCID: PMC6016306 DOI: 10.1589/jpts.30.800] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Accepted: 03/08/2018] [Indexed: 11/24/2022] Open
Abstract
[Purpose] To support home care patients through specialist teams, it is important that
home-visiting specialists recognize the roles of other professionals. The present study
aimed to determine whether home-visiting specialists recognized the roles of various other
professionals. [Subjects and Methods] The study population comprised 400 nurses, 400
rehabilitation specialists, and 122 managerial dieticians providing home medical care. A
questionnaire examining whether the home-visiting specialists recognize the roles of
various other professionals was mailed to the participants. Returned questionnaires
indicated agreement for participation in this study. Based on the responses to the
questionnaire, 49 nurses (response rate: 12.3%), 74 rehabilitation specialists (18.5%),
and 42 managerial dieticians (34.4%) were included in the study. [Results] Among all the
professionals, the recognition of roles of their own profession was greater than that of
other professions, as indicated by their response to the question “to explain possible
changes in symptoms and how to deal with possible changes in symptoms.” Unlike in case of
other professionals, role recognition among managerial dieticians was less than 70% for
all items. [Conclusion] Home medical care teams do not always comprise the most suitable
professionals. An understanding of how to compensate for gaps in professional roles is
therefore important. Good physical assessment skills and an understanding of symptoms of
various disorders is important, regardless of the profession.
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Affiliation(s)
- Yasuaki Kusumoto
- Department of Physical Therapy, Division of Health Science, Tokyo University of Technology: 5-23-22 Nishikamata, Ohta-ku, Tokyo 144-8635, Japan
| | - Hiroko Makita
- Department of Physical Therapy, Division of Health Science, Tokyo University of Technology: 5-23-22 Nishikamata, Ohta-ku, Tokyo 144-8635, Japan
| | - Kuniyoshi Nagai
- Department of Nursing, School of Health Science, Toyohashi Sozo University, Japan
| | - Tomoe Yamane
- Department of Nursing, School of Health Science, Toyohashi Sozo University, Japan
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Kimura H, Konno S, Makita H, Taniguchi N, Shimizu K, Suzuki M, Kimura H, Goudarzi H, Nakamaru Y, Ono J, Ohta S, Izuhara K, Ito YM, Wenzel SE, Nishimura M. Prospective predictors of exacerbation status in severe asthma over a 3-year follow-up. Clin Exp Allergy 2018; 48:1137-1146. [PMID: 29781543 DOI: 10.1111/cea.13170] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 03/14/2018] [Accepted: 03/29/2018] [Indexed: 12/15/2022]
Abstract
BACKGROUND A predisposition to exacerbations is being recognized as a distinct phenotype with "previous exacerbations" representing the strongest clinical factor associated with future exacerbation. Thus, to identify additional novel biomarkers associated with asthma exacerbations, "past exacerbation status" must be included as a confounding factor. OBJECTIVE This study aimed to characterize the clinical and biomarker features associated with asthma exacerbations in severe asthma. METHODS We evaluated clinical parameters from 105 severe asthmatics yearly for 3 years, as well as their exacerbation status. We classified the subjects into 3 groups: (i) consistent non-exacerbators (CNE, subjects who did not experience any exacerbation over the 3-year period); (ii) consistent frequent exacerbators (CFE, subjects with frequent exacerbation, defined as those who had 2 or more exacerbations within 1 year, throughout the 3-year period); and (iii) intermittent exacerbators (IE). We conducted multivariate analysis for comparisons among the groups for multiple factors, including several Th2-related biomarkers, in addition to the "past exacerbation status." RESULTS Thirty-nine subjects were classified as CNE, 15 as CFE, and 51 as IE. Frequent exacerbations in the previous year predicted exacerbations for the following year (P < .001). Among the several Th2-related biomarkers, only FeNO was associated with exacerbation status. When we analysed the data after the second visit, the impact of FeNO on predicting future exacerbation remained significant, even after considering the exacerbation status during the first year (P < .05). CONCLUSIONS AND CLINICAL RELEVANCE Measurement of FeNO has a significant potential to predict future asthma exacerbation, which is independent of the "past exacerbation history."
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Affiliation(s)
- H Kimura
- Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - S Konno
- Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - H Makita
- Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - N Taniguchi
- Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - K Shimizu
- Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - M Suzuki
- Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - H Kimura
- Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - H Goudarzi
- Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Y Nakamaru
- Otolaryngology Head and Neck Surgery, Hokkaido University School of Medicine, Sapporo, Japan
| | - J Ono
- Shino-Test Corporation, Kanagawa, Japan
| | - S Ohta
- Division of Medical Biochemistry, Department of Biomolecular Sciences, Saga Medical School, Saga, Japan
| | - K Izuhara
- Division of Medical Biochemistry, Department of Biomolecular Sciences, Saga Medical School, Saga, Japan
| | - Y M Ito
- Department of Biostatistics, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - S E Wenzel
- University of Pittsburgh Asthma Institute at UPMC/University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - M Nishimura
- Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
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Mino S, Nakagawa S, Makita H, Toki T, Miyazaki J, Sievert SM, Polz MF, Inagaki F, Godfroy A, Kato S, Watanabe H, Nunoura T, Nakamura K, Imachi H, Watsuji TO, Kojima S, Takai K, Sawabe T. Endemicity of the cosmopolitan mesophilic chemolithoautotroph Sulfurimonas at deep-sea hydrothermal vents. ISME J 2017; 11:909-919. [PMID: 28045457 DOI: 10.1038/ismej.2016.178] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 10/21/2016] [Accepted: 10/31/2016] [Indexed: 11/09/2022]
Abstract
Rich animal and microbial communities have been found at deep-sea hydrothermal vents. Although the biogeography of vent macrofauna is well understood, the corresponding knowledge about vent microbial biogeography is lacking. Here, we apply the multilocus sequence analysis (MLSA) to assess the genetic variation of 109 Sulfurimonas strains with ⩾98% 16S rRNA gene sequence similarity, which were isolated from four different geographical regions (Okinawa Trough (OT), Mariana Volcanic Arc and Trough (MVAT), Central Indian Ridge (CIR) and Mid-Atlantic Ridge (MAR)). Sequence typing based on 11 protein-coding genes revealed high genetic variation, including some allele types that are widespread within regions, resulting in 102 nucleotide sequence types (STs). This genetic variation was predominantly due to mutation rather than recombination. Phylogenetic analysis of the 11 concatenated genes showed a clear geographical isolation corresponding to the hydrothermal regions they originated from, suggesting limited dispersal. Genetic differentiation among Sulfurimonas populations was primarily influenced by geographical distance rather than gas composition of vent fluid or habitat, although in situ environmental conditions of each microhabitat could not be examined. Nevertheless, Sulfurimonas may possess a higher dispersal capability compared with deep-sea hydrothermal vent thermophiles. This is the first report on MLSA of deep-sea hydrothermal vent Epsilonproteobacteria, which is indicative of allopatric speciation.
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Affiliation(s)
- Sayaka Mino
- Laboratory of Microbiology, Faculty of Fisheries Sciences, Hokkaido University, Hakodate, Japan
| | - Satoshi Nakagawa
- Laboratory of Marine Environmental Microbiology, Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan.,Department of Subsurface Geobiology Analysis and Research (D-SUGAR), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
| | - Hiroko Makita
- Department of Subsurface Geobiology Analysis and Research (D-SUGAR), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
| | - Tomohiro Toki
- Department of Chemistry, Biology, and Marine Science, Faculty of Science, University of the Ryukyus, Nishihara, Japan
| | - Junichi Miyazaki
- Department of Subsurface Geobiology Analysis and Research (D-SUGAR), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
| | - Stefan M Sievert
- Department of Biology, Woods Hole Oceanographic Institution, Woods Hole, MA, USA
| | - Martin F Polz
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Fumio Inagaki
- Kochi Institute for Core Sample Research, JAMSTEC, Nankoku, Japan.,Research and Development Center for Ocean Drilling Science (ODS), JAMSTEC, Yokohama, Japan
| | - Anne Godfroy
- Ifremer, UMR6197, Laboratoire de Microbiologie des Environnements Extrêmes, Plouzané, France
| | - Shingo Kato
- Japan Collection of Microorganisms, RIKEN BioResource Center, Tsukuba, Japan
| | - Hiromi Watanabe
- Department of Marine Biodiversity Research, JAMSTEC, Yokosuka, Japan
| | - Takuro Nunoura
- Research and Development Center for Marine Biosciences, JAMSTEC, Yokosuka, Japan
| | - Koichi Nakamura
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
| | - Hiroyuki Imachi
- Department of Subsurface Geobiology Analysis and Research (D-SUGAR), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
| | - Tomo-O Watsuji
- Department of Subsurface Geobiology Analysis and Research (D-SUGAR), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
| | - Shigeaki Kojima
- Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan
| | - Ken Takai
- Department of Subsurface Geobiology Analysis and Research (D-SUGAR), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
| | - Tomoo Sawabe
- Laboratory of Microbiology, Faculty of Fisheries Sciences, Hokkaido University, Hakodate, Japan
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Makita H, Tanaka E, Mitsunobu S, Miyazaki M, Nunoura T, Uematsu K, Takaki Y, Nishi S, Shimamura S, Takai K. Mariprofundus micogutta sp. nov., a novel iron-oxidizing zetaproteobacterium isolated from a deep-sea hydrothermal field at the Bayonnaise knoll of the Izu-Ogasawara arc, and a description of Mariprofundales ord. nov. and Zetaproteobacteria classis nov. Arch Microbiol 2016; 199:335-346. [PMID: 27766355 DOI: 10.1007/s00203-016-1307-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [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: 06/10/2016] [Revised: 09/20/2016] [Accepted: 10/11/2016] [Indexed: 10/20/2022]
Abstract
A novel iron-oxidizing chemolithoautotrophic bacterium, strain ET2T, was isolated from a deep-sea sediment in a hydrothermal field of the Bayonnaise knoll of the Izu-Ogasawara arc. Cells were bean-shaped, curved short rods. Growth was observed at a temperature range of 15-30 °C (optimum 25 °C, doubling time 24 h) and a pH range of 5.8-7.0 (optimum pH 6.4) in the presence of NaCl at a range of 1.0-4.0 % (optimum 2.75 %). The isolate was a microaerophilic, strict chemolithoautotroph capable of growing using ferrous iron and molecular oxygen (O2) as the sole electron donor and acceptor, respectively; carbon dioxide as the sole carbon source; and either ammonium or nitrate as the sole nitrogen source. Phylogenetic analysis based on the 16S rRNA gene sequence indicated that the new isolate was related to the only previously isolated Mariprofundus species, M. ferrooxydans. Although relatively high 16S rRNA gene similarity (95 %) was found between the new isolate and M. ferrooxydans, the isolate was distinct in terms of cellular fatty acid composition, genomic DNA G+C content and cell morphology. Furthermore, genomic comparison between ET2T and M. ferrooxydans PV-1 indicated that the genomic dissimilarity of these strains met the standard for species-level differentiation. On the basis of its physiological and molecular characteristics, strain ET2T (= KCTC 15556T = JCM 30585 T) represents a novel species of Mariprofundus, for which the name Mariprofundus micogutta is proposed. We also propose the subordinate taxa Mariprofundales ord. nov. and Zetaproteobacteria classis nov. in the phylum Proteobacteria.
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Affiliation(s)
- Hiroko Makita
- Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Japan. .,Department of Applied Chemistry, Kanagawa Institute of Technology, 1030 Shimo-ogino, Atsugi, Kanagawa, 243-0292, Japan.
| | - Emiko Tanaka
- Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Japan.,Department of Applied Chemistry, Kanagawa Institute of Technology, 1030 Shimo-ogino, Atsugi, Kanagawa, 243-0292, Japan
| | - Satoshi Mitsunobu
- Department of Environmental Conservation, Graduate School of Agriculture, Ehime University, Tarumi, Matsuyama, 790-8566, Japan
| | - Masayuki Miyazaki
- Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Japan
| | - Takuro Nunoura
- Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Japan
| | - Katsuyuki Uematsu
- Section 1 Geochemical Oceanography, Office of Marine Research Department of Marine Science, Marine Works Japan Ltd., Yokosuka, 237-0061, Japan
| | - Yoshihiro Takaki
- Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Japan
| | - Shinro Nishi
- Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Japan
| | - Shigeru Shimamura
- Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Japan
| | - Ken Takai
- Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Japan
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Nunoura T, Hirai M, Yoshida-Takashima Y, Nishizawa M, Kawagucci S, Yokokawa T, Miyazaki J, Koide O, Makita H, Takaki Y, Sunamura M, Takai K. Distribution and Niche Separation of Planktonic Microbial Communities in the Water Columns from the Surface to the Hadal Waters of the Japan Trench under the Eutrophic Ocean. Front Microbiol 2016; 7:1261. [PMID: 27559333 PMCID: PMC4978738 DOI: 10.3389/fmicb.2016.01261] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [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: 05/20/2016] [Accepted: 07/29/2016] [Indexed: 01/01/2023] Open
Abstract
The Japan Trench is located under the eutrophic Northwestern Pacific while the Mariana Trench that harbors the unique hadal planktonic biosphere is located under the oligotrophic Pacific. Water samples from the sea surface to just above the seafloor at a total of 11 stations including a trench axis station, were investigated several months after the Tohoku Earthquake in March 2011. High turbidity zones in deep waters were observed at most of the sampling stations. The small subunit (SSU) rRNA gene community structures in the hadal waters (water depths below 6000 m) at the trench axis station were distinct from those in the overlying meso-, bathy and abyssopelagic waters (water depths between 200 and 1000 m, 1000 and 4000 m, and 4000 and 6000 m, respectively), although the SSU rRNA gene sequences suggested that potential heterotrophic bacteria dominated in all of the waters. Potential niche separation of nitrifiers, including ammonia-oxidizing archaea (AOA), was revealed by quantitative PCR analyses. It seems likely that Nitrosopumilus-like AOAs respond to a high flux of electron donors and dominate in several zones of water columns including shallow and very deep waters. This study highlights the effects of suspended organic matter, as induced by seafloor deformation, on microbial communities in deep waters and confirm the occurrence of the distinctive hadal biosphere in global trench environments hypothesized in the previous study.
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Affiliation(s)
- Takuro Nunoura
- Marine Functional Biology Group, Research and Development Center for Marine Biosciences, Japan Agency for Marine-Earth Science and Technology Yokosuka, Japan
| | - Miho Hirai
- Marine Functional Biology Group, Research and Development Center for Marine Biosciences, Japan Agency for Marine-Earth Science and Technology Yokosuka, Japan
| | - Yukari Yoshida-Takashima
- Department of Subsurface Geobiological Analysis and Research, Japan Agency for Marine-Earth Science and Technology Yokosuka, Japan
| | - Manabu Nishizawa
- Department of Subsurface Geobiological Analysis and Research, Japan Agency for Marine-Earth Science and Technology Yokosuka, Japan
| | - Shinsuke Kawagucci
- Department of Subsurface Geobiological Analysis and Research, Japan Agency for Marine-Earth Science and Technology Yokosuka, Japan
| | - Taichi Yokokawa
- Marine Functional Biology Group, Research and Development Center for Marine Biosciences, Japan Agency for Marine-Earth Science and Technology Yokosuka, Japan
| | - Junichi Miyazaki
- Department of Subsurface Geobiological Analysis and Research, Japan Agency for Marine-Earth Science and Technology Yokosuka, Japan
| | - Osamu Koide
- Marine Functional Biology Group, Research and Development Center for Marine Biosciences, Japan Agency for Marine-Earth Science and Technology Yokosuka, Japan
| | - Hiroko Makita
- Department of Subsurface Geobiological Analysis and Research, Japan Agency for Marine-Earth Science and Technology Yokosuka, Japan
| | - Yoshihiro Takaki
- Marine Functional Biology Group, Research and Development Center for Marine Biosciences, Japan Agency for Marine-Earth Science and TechnologyYokosuka, Japan; Department of Subsurface Geobiological Analysis and Research, Japan Agency for Marine-Earth Science and TechnologyYokosuka, Japan
| | - Michinari Sunamura
- Department of Earth and Planetary Science, The University of Tokyo Tokyo, Japan
| | - Ken Takai
- Department of Subsurface Geobiological Analysis and Research, Japan Agency for Marine-Earth Science and Technology Yokosuka, Japan
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Kikuchi S, Makita H, Konno U, Shiraishi F, Ijiri A, Takai K, Maeda M, Takahashi Y. Limited reduction of ferrihydrite encrusted by goethite in freshwater sediment. Geobiology 2016; 14:374-389. [PMID: 27027643 DOI: 10.1111/gbi.12181] [Citation(s) in RCA: 5] [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: 08/21/2015] [Accepted: 01/18/2016] [Indexed: 06/05/2023]
Abstract
Many physical and chemical processes control the extent of Fe(III) oxyhydroxide reduction by dissimilatory Fe(III)-reducing bacteria. The surface precipitation of secondary Fe minerals on Fe(III) oxyhydroxides limits the extent of microbial Fe(III) reduction, but this phenomenon has not yet been observed in nature. This paper reports the observation of secondary Fe-mineral (goethite) encrustation on ferrihydrite surface within freshwater sediment up to 10 cm deep. The sediment surface was characterized by the predominance of ferrihydrites with biogenic stalks and sheaths. An Fe(II)-oxidizing bacterium (Gallionellaceae) was detected by 16S rRNA gene analysis at sediment depths of 1 and 2 cm. Fe(2+) concentration in the sediment pore water was relatively higher at 2-4 cm depths. The 16S rRNA genes affiliated with dissimilatory Fe(III)-reducing bacteria were detected at 1, 2, and 4 cm depths. The results of the Fe K-edge extended X-ray absorption fine structure (EXAFS) analysis suggested the presence of goethite and siderite at depths below 3 cm. However, the change in the Fe-mineral composition was restricted to sediment depths between 3 and 4 cm, despite the presence of abundant ferrihydrite at depths below 4 cm. An increase in CH4 concentration was observed at deeper than 6 cm. Stable isotopic analysis of CH4 in the pore water indicated that acetoclastic CH4 occurred at depths below 7 cm. Transmission electron microscope observations suggested the presence of goethite and siderite on stalks and sheaths at depths below 3 cm. Results from conversion electron yield EXAFS analysis suggested that goethite dominated at 10 cm depth, thereby indicating that ferrihydrite was encrusted by goethite at this depth. Moreover, the incomplete reduction of ferrihydrite below depths of 4 cm was not due to the lack of organic carbon, but was possibly due to the surface encrustation of goethite on ferrihydrite.
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Affiliation(s)
- S Kikuchi
- Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
- Project Team for Development of New-Generation Research Protocol for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
| | - H Makita
- Department of Subsurface Geobiological Analysis and Research (d-SUGAR), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
| | - U Konno
- Department of Subsurface Geobiological Analysis and Research (d-SUGAR), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
| | - F Shiraishi
- Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
| | - A Ijiri
- Kochi Institute for Core Sample Research, Agency for Marine-Earth Science and Technology (JAMSTEC), Nankoku, Kochi, Japan
| | - K Takai
- Department of Subsurface Geobiological Analysis and Research (d-SUGAR), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
| | - M Maeda
- Department of Technical Center, Hiroshima University, Higashi-Hiroshima, Japan
| | - Y Takahashi
- Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
- Department of Earth and Planetary Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
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Mitsunobu S, Zhu M, Takeichi Y, Ohigashi T, Suga H, Jinno M, Makita H, Sakata M, Ono K, Mase K, Takahashi Y. Direct Detection of Fe(II) in Extracellular Polymeric Substances (EPS) at the Mineral-Microbe Interface in Bacterial Pyrite Leaching. Microbes Environ 2016; 31:63-9. [PMID: 26947441 PMCID: PMC4791118 DOI: 10.1264/jsme2.me15137] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [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] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 01/09/2016] [Indexed: 11/12/2022] Open
Abstract
We herein investigated the mechanisms underlying the contact leaching process in pyrite bioleaching by Acidithiobacillus ferrooxidans using scanning transmission X-ray microscopy (STXM)-based C and Fe near edge X-ray absorption fine structure (NEXAFS) analyses. The C NEXAFS analysis directly showed that attached A. ferrooxidans produces polysaccharide-abundant extracellular polymeric substances (EPS) at the cell-pyrite interface. Furthermore, by combining the C and Fe NEXAFS results, we detected significant amounts of Fe(II), in addition to Fe(III), in the interfacial EPS at the cell-pyrite interface. A probable explanation for the Fe(II) in detected EPS is the leaching of Fe(II) from the pyrite. The detection of Fe(II) also indicates that Fe(III) resulting from pyrite oxidation may effectively function as an oxidizing agent for pyrite at the cell-pyrite interface. Thus, our results imply that a key role of Fe(III) in EPS, in addition to its previously described role in the electrostatic attachment of the cell to pyrite, is enhancing pyrite dissolution.
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Affiliation(s)
- Satoshi Mitsunobu
- Department of Environmental Conservation, Graduate School of Agriculture, Ehime UniversityTarumi, Matsuyama 790–8566Japan
| | - Ming Zhu
- Graduate Division of Nutritional and Environmental Sciences, University of ShizuokaYada, Suruga-ku, Shizuoka 422–8526Japan
| | - Yasuo Takeichi
- Institute of Materials Structure Science, High-Energy Accelerator Research Organization (KEK)Oho, Tsukuba, Ibaraki 305–0801Japan
- The Graduate University for Advanced Studies1–1 Oho, Tsukuba 305–0801Japan
| | - Takuji Ohigashi
- UVSOR facility, Institute for Molecular ScienceMyodaiji, Okazaki 444–8585Japan
| | - Hiroki Suga
- Department of Earth and Planetary Systems Science, Hiroshima UniversityKagamiyama, Higashi-Hiroshima, Hiroshima 739–8526
| | - Muneaki Jinno
- Institute of Materials Structure Science, High-Energy Accelerator Research Organization (KEK)Oho, Tsukuba, Ibaraki 305–0801Japan
- Toyama Co. Ltd.4–13–16 Hibarigaoka, Zama, Kanagawa 252–0002Japan
| | - Hiroko Makita
- Japan Agency for Marine-Earth Science and Technology (JAMSTEC)Natsushima-cho, Yokosuka, Kanagawa 237–0061Japan
| | - Masahiro Sakata
- Graduate Division of Nutritional and Environmental Sciences, University of ShizuokaYada, Suruga-ku, Shizuoka 422–8526Japan
| | - Kanta Ono
- Institute of Materials Structure Science, High-Energy Accelerator Research Organization (KEK)Oho, Tsukuba, Ibaraki 305–0801Japan
- The Graduate University for Advanced Studies1–1 Oho, Tsukuba 305–0801Japan
| | - Kazuhiko Mase
- Institute of Materials Structure Science, High-Energy Accelerator Research Organization (KEK)Oho, Tsukuba, Ibaraki 305–0801Japan
- The Graduate University for Advanced Studies1–1 Oho, Tsukuba 305–0801Japan
| | - Yoshio Takahashi
- Department of Earth and Planetary Science, The University of TokyoHongo, Bunkyo-ku, Tokyo 113–0033Japan
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Nogi Y, Mori K, Makita H, Hatada Y. Thalassobius abyssi sp. nov., a marine bacterium isolated from cold-seep sediment. Int J Syst Evol Microbiol 2016; 66:574-579. [DOI: 10.1099/ijsem.0.000758] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Yuichi Nogi
- Research and Development Center for Marine Biosciences,Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061,Japan
| | - Kozue Mori
- Research and Development Center for Marine Biosciences,Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061,Japan
| | - Hiroko Makita
- Department of Subsurface Geobiological Analysis and Research,Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061,Japan
| | - Yuji Hatada
- Research and Development Center for Marine Biosciences,Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061,Japan
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11
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Mitsunobu S, Zhu M, Takeichi Y, Ohigashi T, Suga H, Makita H, Sakata M, Ono K, Mase K, Takahashi Y. Nanoscale Identification of Extracellular Organic Substances at the Microbe–Mineral Interface by Scanning Transmission X-ray Microscopy. CHEM LETT 2015. [DOI: 10.1246/cl.140880] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Satoshi Mitsunobu
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka
| | - Ming Zhu
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka
| | - Yasuo Takeichi
- Institute of Materials Structure Science, High-Energy Accelerator Research Organization (KEK)
- The Graduate University for Advanced Studies
| | | | - Hiroki Suga
- Department of Earth and Planetary Systems Science, Hiroshima University
| | - Hiroko Makita
- Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
| | - Masahiro Sakata
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka
| | - Kanta Ono
- Institute of Materials Structure Science, High-Energy Accelerator Research Organization (KEK)
- The Graduate University for Advanced Studies
| | - Kazuhiko Mase
- Institute of Materials Structure Science, High-Energy Accelerator Research Organization (KEK)
- The Graduate University for Advanced Studies
| | - Yoshio Takahashi
- Institute of Materials Structure Science, High-Energy Accelerator Research Organization (KEK)
- Department of Earth and Planetary Science, The University of Tokyo
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12
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Nunoura T, Takaki Y, Kazama H, Kakuta J, Shimamura S, Makita H, Hirai M, Miyazaki M, Takai K. Physiological and genomic features of a novel sulfur-oxidizing gammaproteobacterium belonging to a previously uncultivated symbiotic lineage isolated from a hydrothermal vent. PLoS One 2014; 9:e104959. [PMID: 25133584 PMCID: PMC4136832 DOI: 10.1371/journal.pone.0104959] [Citation(s) in RCA: 31] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 07/15/2014] [Indexed: 12/04/2022] Open
Abstract
Strain Hiromi 1, a sulfur-oxidizing gammaproteobacterium was isolated from a hydrothermal vent chimney in the Okinawa Trough and represents a novel genus that may include a phylogenetic group found as endosymbionts of deep-sea gastropods. The SSU rRNA gene sequence similarity between strain Hiromi 1 and the gastropod endosymbionts was approximately 97%. The strain was shown to grow both chemolithoautotrophically and chemolithoheterotrophically with an energy metabolism of sulfur oxidation and O2 or nitrate reduction. Under chemolithoheterotrophic growth conditions, the strain utilized organic acids and proteinaceous compounds as the carbon and/or nitrogen sources but not the energy source. Various sugars did not support growth as a sole carbon source. The observation of chemolithoheterotrophy in this strain is in line with metagenomic analyses of endosymbionts suggesting the occurrence of chemolithoheterotrophy in gammaproteobacterial symbionts. Chemolithoheterotrophy and the presence of homologous genes for virulence- and quorum sensing-related functions suggest that the sulfur-oxidizing chomolithotrophic microbes seek animal bodies and microbial biofilm formation to obtain supplemental organic carbons in hydrothermal ecosystems.
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Affiliation(s)
- Takuro Nunoura
- Subsurface Geobiology & Advanced Research (SUGAR) Project, Extremobiosphere Research Program, Institute of Biogeosciences, Japan Agency for Marine-Earth Science & Technology (JAMSTEC), Yokosuka, Japan
- * E-mail:
| | - Yoshihiro Takaki
- Subsurface Geobiology & Advanced Research (SUGAR) Project, Extremobiosphere Research Program, Institute of Biogeosciences, Japan Agency for Marine-Earth Science & Technology (JAMSTEC), Yokosuka, Japan
| | - Hiromi Kazama
- Subsurface Geobiology & Advanced Research (SUGAR) Project, Extremobiosphere Research Program, Institute of Biogeosciences, Japan Agency for Marine-Earth Science & Technology (JAMSTEC), Yokosuka, Japan
| | - Jungo Kakuta
- Subsurface Geobiology & Advanced Research (SUGAR) Project, Extremobiosphere Research Program, Institute of Biogeosciences, Japan Agency for Marine-Earth Science & Technology (JAMSTEC), Yokosuka, Japan
| | - Shigeru Shimamura
- Subsurface Geobiology & Advanced Research (SUGAR) Project, Extremobiosphere Research Program, Institute of Biogeosciences, Japan Agency for Marine-Earth Science & Technology (JAMSTEC), Yokosuka, Japan
| | - Hiroko Makita
- Subsurface Geobiology & Advanced Research (SUGAR) Project, Extremobiosphere Research Program, Institute of Biogeosciences, Japan Agency for Marine-Earth Science & Technology (JAMSTEC), Yokosuka, Japan
| | - Miho Hirai
- Subsurface Geobiology & Advanced Research (SUGAR) Project, Extremobiosphere Research Program, Institute of Biogeosciences, Japan Agency for Marine-Earth Science & Technology (JAMSTEC), Yokosuka, Japan
| | - Masayuki Miyazaki
- Subsurface Geobiology & Advanced Research (SUGAR) Project, Extremobiosphere Research Program, Institute of Biogeosciences, Japan Agency for Marine-Earth Science & Technology (JAMSTEC), Yokosuka, Japan
| | - Ken Takai
- Subsurface Geobiology & Advanced Research (SUGAR) Project, Extremobiosphere Research Program, Institute of Biogeosciences, Japan Agency for Marine-Earth Science & Technology (JAMSTEC), Yokosuka, Japan
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Makita H, Nakahara Y, Fukui H, Miyanoiri Y, Katahira M, Seki H, Takeda M, Koizumi JI. Identification of 2-(Cysteinyl)amido-2-deoxy-D-galacturonic Acid Residue from the Sheath ofLeptothrix cholodnii. Biosci Biotechnol Biochem 2014; 70:1265-8. [PMID: 16717434 DOI: 10.1271/bbb.70.1265] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [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: 11/08/2022]
Abstract
The sheath of Leptothrix cholodnii is a glycoconjugate composed of a polysaccharide and a peptide rich in cysteine. In this study, structural determination of the hydrazinolyzate of the sheath was carried out. Since the hydrazinolyzate is a polysaccharide incorporated with cysteine, it was S-derivatized with a thiol-specific fluorogenic reagent, 4-(aminosulfonyl)-7-fluoro-2,1,3-benzoxadiazole (ABD-F). Fluorescent fragments were purified by HPLC, and their structures were analyzed by mass spectrometry and NMR spectroscopy. The sheath was found to contain 2-(cysteinyl)amido-2-deoxy-D-galacturonic acid residue.
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Affiliation(s)
- Hiroko Makita
- Division of Materials Science and Chemical Engineering, Faculty of Engineering, Yokonama National University, Japan.
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14
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Kikuchi S, Makita H, Takai K, Yamaguchi N, Takahashi Y. Characterization of biogenic iron oxides collected by the newly designed liquid culture method using diffusion chambers. Geobiology 2014; 12:133-145. [PMID: 24382149 DOI: 10.1111/gbi.12073] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Accepted: 12/04/2013] [Indexed: 06/03/2023]
Abstract
We designed a new culture method for neutrophilic iron-oxidizing bacteria using liquid medium (i) to study the formation and mineralogical characteristics of biogenic iron oxides (BIOS) and (ii) to apply BIOS to various scientific and engineering applications. An iron-oxidizing bacterium, Mariprofundus ferrooxydans PV-1(T) (ATCC, BAA-1020), was cultured using a set of diffusion chambers to prepare a broad anoxic-oxic interface, upon which BIOS formation is typically observed in natural environments. Iron oxide precipitates were generated in parallel with bacterial growth. A scanning electron microscopy analysis indicated that the morphological features of the iron oxide precipitates in the medium (in vitro BIOS) were similar to those of BIOS collected from natural deep-sea hydrothermal environments in the Northwest Eifuku Seamount field in the northern Mariana Arc (in situ BIOS). Further chemical speciation of both the in vitro and in situ BIOS was examined with X-ray absorption fine structure (XAFS). A bulk XAFS analysis showed that the minerals in both BIOS were mainly ferrihydrite and oligomeric stages of amorphous iron oxyhydroxides with edge-sharing octahedral linkages. The amount of in vitro BIOS produced with the diffusion-chamber method was greater than those produced previously with other culture methods, such as gel-stabilized gradient and batch liquid culture methods. The larger yields of BIOS produced with the new culture method will allow us to clarify in the future the mineralization mechanisms during bacterial growth and to examine the physicochemical properties of BIOS, such as their adsorption to and coprecipitation with various elements and substances.
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Affiliation(s)
- S Kikuchi
- Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
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Nunoura T, Hirai M, Miyazaki M, Kazama H, Makita H, Hirayama H, Furushima Y, Yamamoto H, Imachi H, Takai K. Isolation and characterization of a thermophilic, obligately anaerobic and heterotrophic marine Chloroflexi bacterium from a Chloroflexi-dominated microbial community associated with a Japanese shallow hydrothermal system, and proposal for Thermomarinilinea lacunofontalis gen. nov., sp. nov. Microbes Environ 2013; 28:228-35. [PMID: 23666537 PMCID: PMC4070665 DOI: 10.1264/jsme2.me12193] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
A novel marine thermophilic and heterotrophic Anaerolineae bacterium in the phylum Chloroflexi, strain SW7T, was isolated from an in situ colonization system deployed in the main hydrothermal vent of the Taketomi submarine hot spring field located on the southern part of Yaeyama Archipelago, Japan. The microbial community associated with the hydrothermal vent was predominated by thermophilic heterotrophs such as Thermococcaceae and Anaerolineae, and the next dominant population was thermophilic sulfur oxidizers. Both aerobic and anaerobic hydrogenotrophs including methanogens were detected as minor populations. During the culture-dependent viable count analysis in this study, an Anaerolineae strain SW7T was isolated from an enrichment culture at a high dilution rate. Strain SW7T was an obligately anaerobic heterotroph that grew with fermentation and had non-motile thin rods 3.5–16.5 μm in length and 0.2 μm in width constituting multicellular filaments. Growth was observed between 37–65°C (optimum 60°C), pH 5.5–7.3 (optimum pH 6.0), and 0.5–3.5% (w/v) NaCl concentration (optimum 1.0%). Based on the physiological and phylogenetic features of a new isolate, we propose a new species representing a novel genus Thermomarinilinea: the type strain of Thermomarinilinea lacunofontalis sp. nov., is SW7T (=JCM15506T=KCTC5908T).
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Affiliation(s)
- Takuro Nunoura
- Subsurface Geobiology & Advanced Research Project, Extremobiosphere Research Program, Institute of Biogeosciences, Japan Agency for Marine-Earth Science & Technology, 2–15 Natsushima-cho, Yokosuka 237–0061, Japan
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16
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Mino S, Makita H, Toki T, Miyazaki J, Kato S, Watanabe H, Imachi H, Watsuji TO, Nunoura T, Kojima S, Sawabe T, Takai K, Nakagawa S. Biogeography of Persephonella in deep-sea hydrothermal vents of the Western Pacific. Front Microbiol 2013; 4:107. [PMID: 23630523 PMCID: PMC3635849 DOI: 10.3389/fmicb.2013.00107] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [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: 12/30/2012] [Accepted: 04/13/2013] [Indexed: 11/30/2022] Open
Abstract
Deep-sea hydrothermal vent fields are areas on the seafloor with high biological productivity fueled by microbial chemosynthesis. Members of the Aquificales genus Persephonella are obligately chemosynthetic bacteria, and appear to be key players in carbon, sulfur, and nitrogen cycles in high temperature habitats at deep-sea vents. Although this group of bacteria has cosmopolitan distribution in deep-sea hydrothermal ecosystem around the world, little is known about their population structure such as intraspecific genomic diversity, distribution pattern, and phenotypic diversity. We developed the multi-locus sequence analysis (MLSA) scheme for their genomic characterization. Sequence variation was determined in five housekeeping genes and one functional gene of 36 Persephonella hydrogeniphila strains originated from the Okinawa Trough and the South Mariana Trough (SNT). Although the strains share >98.7% similarities in 16S rRNA gene sequences, MLSA revealed 35 different sequence types (ST), indicating their extensive genomic diversity. A phylogenetic tree inferred from all concatenated gene sequences revealed the clustering of isolates according to the geographic origin. In addition, the phenotypic clustering pattern inferred from whole-cell matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF/MS) analysis can be correlated to their MLSA clustering pattern. This study represents the first MLSA combined with phenotypic analysis indicative of allopatric speciation of deep-sea hydrothermal vent bacteria.
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Affiliation(s)
- Sayaka Mino
- Laboratory of Microbiology, Faculty of Fisheries Sciences, Hokkaido University Hakodate, Japan
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Makita H, Nakagawa S, Miyazaki M, Nakamura KI, Inagaki F, Takai K. Thiofractor thiocaminus gen. nov., sp. nov., a novel hydrogen-oxidizing, sulfur-reducing epsilonproteobacterium isolated from a deep-sea hydrothermal vent chimney in the Nikko Seamount field of the northern Mariana Arc. Arch Microbiol 2012; 194:785-94. [PMID: 22526267 DOI: 10.1007/s00203-012-0814-1] [Citation(s) in RCA: 14] [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] [Received: 11/09/2011] [Revised: 03/30/2012] [Accepted: 04/05/2012] [Indexed: 11/25/2022]
Abstract
A novel chemolithoautotrophic hydrogen-oxidizing and sulfur-reducing bacterium, strain 496Chim(T), was isolated from a deep-sea hydrothermal vent chimney collected from the hydrothermal field at the summit of Nikko Seamount field, in the Mariana Arc. Cells were rods or curved rods, motile by means of a single polar flagellum. Growth was observed between 15 and 45 °C (optimum 37 °C; doubling time, 2.1 h) and between pH 5.3 and 8.0 (optimum pH 6.0). The isolate was a strictly anaerobic, obligate chemolithoautotroph capable of growth using molecular hydrogen as the sole energy source, carbon dioxide as the sole carbon source, ammonium or nitrate as the sole nitrogen source, and elemental sulfur as the electron acceptor. The G+C content of genomic DNA was 35 mol%. Phylogenetic analysis based on 16S rRNA gene sequences indicated that the new isolate belonged to the class Epsilonproteobacteria, but the isolate was distantly related to the previously described Epsilonproteobacteria species potentially at the genus level (<90 %). On the basis of its physiological and molecular characteristics, strain 496Chim(T) (=DSM 22050(Τ) = JCM 15747(Τ) = NBRC 105224(Τ)) represents the sole species of a new genus, Thiofractor, for which the name Thiofractor thiocaminus is proposed.
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Affiliation(s)
- Hiroko Makita
- Subsurface Geobiology and Advanced Research Project, Extremobiosphere Research Program, Institute of Biogeosciences, Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima-cho, Yokosuka 237-0061, Japan.
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18
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Mitsunobu S, Shiraishi F, Makita H, Orcutt BN, Kikuchi S, Jorgensen BB, Takahashi Y. Bacteriogenic Fe(III) (oxyhydr)oxides characterized by synchrotron microprobe coupled with spatially resolved phylogenetic analysis. Environ Sci Technol 2012; 46:3304-3311. [PMID: 22360427 DOI: 10.1021/es203860m] [Citation(s) in RCA: 12] [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: 05/31/2023]
Abstract
Ubiquitous presence of microbes in aquatic systems and their inherent ability of biomineralization make them extremely important agents in the geochemical cycling of inorganic elements. However, the detailed mechanisms of environmental biomineralization (e.g., the actual reaction rates, the temporal and spatial dynamics of these processes) are largely unknown, because there are few adequate analytical techniques to observe the biogenic oxidation/reduction reactions in situ. Here, we report a novel technical approach to characterize specific biominerals associated with a target microbe on high spatial resolution. The technique was developed by combining directly in situ phylogenetic analysis, fluorescence in situ hybridization (FISH), with a synchrotron microprobe method, micro X-ray absorption fine structure spectroscopy (μ-XAFS), and was applied to iron mineral deposition by iron(II)-oxidizing bacteria (IOB) in environmental samples. In situ visualization of microbes revealed that in natural iron mats, Betaproteobacteria dominated by IOB were dominantly localized within 10 μm of the surface. Furthermore, in situ chemical speciation by the synchrotron microprobe suggested that the Fe local structure at the IOB accumulating parts was dominantly composed of short-ordered Fe-O(6) linkage, which is not observed in bulk iron mat samples. The present study indicates that coupled XAFS-FISH could be a potential technique to provide direct information on specific biogenic reaction mediated by target microorganism.
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Affiliation(s)
- Satoshi Mitsunobu
- Institute for Environmental Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan.
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Hirayama H, Suzuki Y, Abe M, Miyazaki M, Makita H, Inagaki F, Uematsu K, Takai K. Methylothermus subterraneus sp. nov., a moderately thermophilic methanotroph isolated from a terrestrial subsurface hot aquifer. Int J Syst Evol Microbiol 2011; 61:2646-2653. [DOI: 10.1099/ijs.0.028092-0] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A novel methane-oxidizing bacterium, strain HTM55T, was isolated from subsurface hot aquifer water from a Japanese gold mine. Strain HTM55T was a Gram-negative, aerobic, motile, coccoid bacterium with a single polar flagellum and the distinctive intracytoplasmic membrane arrangement of a type I methanotroph. Strain HTM55T was a moderately thermophilic, obligate methanotroph that grew on methane and methanol at 37–65 °C (optimum 55–60 °C). The isolate grew at pH 5.2–7.5 (optimum 5.8–6.3) and with 0–1 % NaCl (optimum 0–0.3 %). The ribulose monophosphate pathway was operative for carbon assimilation. The DNA G+C content was 54.4 mol% and the major fatty acids were C16 : 0 (52.0 %) and C18 : 1ω7c (34.8 %). Phylogenetic analysis of the 16S rRNA gene sequence indicated that strain HTM55T was closely related to Methylothermus thermalis MYHTT (99.2 % 16S rRNA gene sequence similarity), which is within the class Gammaproteobacteria. However, DNA–DNA relatedness between strain HTM55T and Methylothermus thermalis MYHTT was ≤39 %. On the basis of distinct phylogenetic, chemotaxonomic and physiological characteristics, strain HTM55T represents a novel species of the genus Methylothermus, for which the name Methylothermus subterraneus sp. nov. is proposed. The type strain is HTM55T ( = JCM 13664T = DSM 19750T).
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Affiliation(s)
- Hisako Hirayama
- Institute of Biogeosciences, Japan Agency for Marine-Earth Science & Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Japan
| | - Yohey Suzuki
- Institute for Geo-Resources & Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, 305-8567, Japan
| | - Mariko Abe
- Institute of Biogeosciences, Japan Agency for Marine-Earth Science & Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Japan
| | - Masayuki Miyazaki
- Institute of Biogeosciences, Japan Agency for Marine-Earth Science & Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Japan
| | - Hiroko Makita
- Institute of Biogeosciences, Japan Agency for Marine-Earth Science & Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Japan
| | - Fumio Inagaki
- Geomicrobiology Group, Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science & Technology (JAMSTEC), Monobe B200, Nankoku, Kochi, 783-8502, Japan
| | - Katsuyuki Uematsu
- Department of Technical Services, Marine Works Japan Ltd, 2-16-32 Kamariyahigashi, Kanazawa-ku, Yokohama, 236-0042, Japan
| | - Ken Takai
- Institute of Biogeosciences, Japan Agency for Marine-Earth Science & Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Japan
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Kikuchi S, Makita H, Mitsunobu S, Terada Y, Yamaguchi N, Takai K, Takahashi Y. Application of Synchrotron µ-XRF-XAFS to the Speciation of Fe on a Single Stalk in Bacteriogenic Iron Oxides (BIOS). CHEM LETT 2011. [DOI: 10.1246/cl.2011.680] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Nunoura T, Hirai M, Imachi H, Miyazaki M, Makita H, Hirayama H, Furushima Y, Yamamoto H, Takai K. Kosmotoga arenicorallina sp. nov. a thermophilic and obligately anaerobic heterotroph isolated from a shallow hydrothermal system occurring within a coral reef, southern part of the Yaeyama Archipelago, Japan, reclassification of Thermococcoides shengliensis as Kosmotoga shengliensis comb. nov., and emended description of the genus Kosmotoga. Arch Microbiol 2010; 192:811-9. [PMID: 20694719 DOI: 10.1007/s00203-010-0611-7] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2010] [Revised: 07/20/2010] [Accepted: 07/26/2010] [Indexed: 11/28/2022]
Abstract
A novel thermophilic and sulfur-reducing bacterium, strain S304(T), was isolated from the Taketomi submarine hot spring shallow hydrothermal field located at southern part of the Yaeyama Archipelago, Japan. The cells were non-motile short thick rods or oval cocci 1.1-2.7 μm in length and 1.1-1.9 μm in width. Strain S304(T) was an obligately anaerobic heterotroph and sulfur reduction stimulates growth. Growth was observed between 50-65°C (optimum 60°C), pH 6.2-8.0 (optimum pH 7.1), 1.0-6.0% NaCl concentration (optimum 3.0%). The fatty acid composition was C(16:0) (71.4%), C(18:0) (20.9%) and C(18:1) (7.7%). The G + C content of genomic DNA was 40.8 mol%. The 16S rRNA gene sequence analysis indicated that strain S304(T) belonged to the genus Kosmotoga. Based on physiological and phylogenetic features of a new isolate, we propose new species in the genus Kosmotoga: the type strain of Kosmotoga arenicorallina sp. nov is S304(T) (=JCM 15790(T) = DSM22549(T)). Thermococcoides shengliensis 2SM-2(T) is phylogenetically associated with Kosmotoga olearia 14.5.1(T). Based on the phylogenetic relationship between Thermococcoides shengliensis 2SM-2(T) and Kosmotoga olearia 14.5.1(T), we propose the reclassification of Thermococcoides shengliensis as Kosmotoga shengliensis comb. nov. (type strain 2SM-2(T)). In addition, an emended description of the genus Kosmotoga is proposed.
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Affiliation(s)
- Takuro Nunoura
- Institute of Biogeosciences, Japan Agency for Marine-Earth Science & Technology, Yokosuka, Japan.
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Toida M, Kato K, Makita H, Long NK, Takeda T, Hatakeyama D, Yamashita T, Shibata T. Palliative effect of lafutidine on oral burning sensation. J Oral Pathol Med 2009; 38:262-8. [DOI: 10.1111/j.1600-0714.2008.00736.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Hasegawa M, Makita H, Nasuhara Y, Odajima N, Nagai K, Ito Y, Betsuyaku T, Nishimura M. Relationship between improved airflow limitation and changes in airway calibre induced by inhaled anticholinergic agents in COPD. Thorax 2008; 64:332-8. [PMID: 19074932 DOI: 10.1136/thx.2008.103671] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [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]
Abstract
BACKGROUND Although airflow limitation improved by inhaled anticholinergic drugs varies among individuals with chronic obstructive pulmonary disease (COPD), the relationship between actual bronchodilation and improved pulmonary function and where in the lung such bronchodilation occurs remains unknown. A study was undertaken to determine the relationship between improved pulmonary function and changes in airway calibre at various sites in the airways in response to inhaled anticholinergic agents in patients with COPD using three-dimensional computed tomography (CT). METHODS CT scans were performed at deep inspiration and detailed pulmonary function tests before and 1 week after daily inhalations of tiotropium bromide in 15 patients with clinically stable COPD. The airway luminal area was examined at the third (segmental) to the sixth generations of eight bronchi in the right lung. RESULTS Bronchodilation was demonstrated by an overall average increase of 39% in the inner luminal area, and the mean (SE) forced expiratory volume in 1 s (FEV(1)) increased from 1.23 (0.11) l to 1.47 (0.13) l. The magnitude of bronchodilation was closely correlated with improved pulmonary function, particularly with that of FEV(1) (r = 0.843, p<0.001). Such correlations were significant at the fourth to the sixth generation but not at the third generation of bronchi, and the slope of the regression lines became steeper from the third to the sixth generation. CONCLUSIONS Inhaled anticholinergic agents induce overall bronchodilation which is in proportion to improvements in FEV(1) in patients with COPD. Bronchodilation at the distal rather than the proximal airways is the determinant of functional improvement.
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Affiliation(s)
- M Hasegawa
- First Department of Medicine, Hokkaido University School of Medicine, N-15 W-7 Kita-ku, Sapporo 060-8638, Japan
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Takeda M, Yoneya A, Miyazaki Y, Kondo K, Makita H, Kondoh M, Suzuki I, Koizumi JI. Prosthecobacter fluviatilis sp. nov., which lacks the bacterial tubulin btubA and btubB genes. Int J Syst Evol Microbiol 2008; 58:1561-5. [PMID: 18599695 DOI: 10.1099/ijs.0.65787-0] [Citation(s) in RCA: 31] [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: 11/18/2022] Open
Abstract
Leptothrix cholodnii is a sheathed bacterium often found in metal-rich and oligotrophic aquatic environments. A bacterial strain that is able to degrade the NaOH-treated sheath of L. cholodnii was isolated. The isolate was a Gram-negative, aerobic and prosthecate bacterium. The optimum growth temperature and pH were 30 degrees C and pH 7.0, respectively. The DNA G+C content was 62.9 mol%. The major respiratory quinone was MK-6. A phylogenetic analysis based on the 16S rRNA gene indicated that the isolate is a member of the genus Prosthecobacter. The nearest relative was the type strain of Prosthecobacter vanneervenii, with a similarity of 97.1 %. However, the isolate does not possess the bacterial tubulin genes, btubA and btubB, unique to known species of the genus Prosthecobacter. It is proposed that the isolate represents a novel species, Prosthecobacter fluviatilis sp. nov. The type strain is HAQ-1(T) (=JCM 14805(T) =KACC 12649(T) =KCTC 22182(T)).
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Affiliation(s)
- Minoru Takeda
- Division of Materials Science and Chemical Engineering, Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya, Yokohama 240-8501, Japan.
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Kato K, Long NK, Makita H, Toida M, Yamashita T, Hatakeyama D, Hara A, Mori H, Shibata T. Effects of green tea polyphenol on methylation status of RECK gene and cancer cell invasion in oral squamous cell carcinoma cells. Br J Cancer 2008; 99:647-54. [PMID: 18665171 PMCID: PMC2527823 DOI: 10.1038/sj.bjc.6604521] [Citation(s) in RCA: 147] [Impact Index Per Article: 9.2] [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] [Subscribe] [Scholar Register] [Received: 11/09/2007] [Revised: 06/23/2008] [Accepted: 06/30/2008] [Indexed: 11/17/2022] Open
Abstract
RECK is a novel tumour suppressor gene that negatively regulates matrix metalloproteinases (MMPs) and inhibits tumour invasion, angiogenesis and metastasis. In the present study, we investigated the effects of epigallocatechin-3-gallate (EGCG), a major polyphenol in green tea, on the methylation status of the RECK gene and cancer invasion in oral squamous cell carcinoma cell lines. Our results showed that treatment of oral cancer cells with EGCG partially reversed the hypermethylation status of the RECK gene and significantly enhanced the expression level of RECK mRNA. Inhibition of MMP-2 and MMP-9 levels was also observed in these cells after treatment with EGCG. Interestingly, EGCG significantly suppressed cancer cell-invasive ability by decreasing the number of invasive foci (P<0.0001) as well as invasion depth (P<0.005) in three-dimensional collagen invasion model. Although further investigation is required to assess the extent of contribution of RECK on MMPs to the suppression of invasive behaviour, these results support the conclusion that EGCG plays a key role in suppressing cell invasion through multiple mechanisms, possibly by demethylation effect on MMP inhibitors such as RECK.
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MESH Headings
- Carcinoma, Squamous Cell/genetics
- Carcinoma, Squamous Cell/metabolism
- Carcinoma, Squamous Cell/pathology
- Catechin/analogs & derivatives
- Catechin/pharmacology
- Cell Line, Tumor
- Cell Movement/drug effects
- DNA Methylation/drug effects
- GPI-Linked Proteins
- Gene Expression Regulation, Neoplastic/drug effects
- Humans
- Matrix Metalloproteinase 2/metabolism
- Matrix Metalloproteinase 9/metabolism
- Matrix Metalloproteinase Inhibitors
- Membrane Glycoproteins/genetics
- Mouth Neoplasms/genetics
- Mouth Neoplasms/metabolism
- Mouth Neoplasms/pathology
- Neoplasm Invasiveness
- Polymerase Chain Reaction
- Promoter Regions, Genetic/genetics
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- RNA, Neoplasm/genetics
- RNA, Neoplasm/metabolism
- Tea
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Affiliation(s)
- K Kato
- Department of Oral and Maxillofacial Sciences, Gifu University, Graduate School of Medicine, 1-1 Yanagido, Gifu 501-1194, Japan.
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26
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Hizawa N, Makita H, Nasuhara Y, Hasegawa M, Nagai K, Ito Y, Betsuyaku T, Konno S, Nishimura M. Functional single nucleotide polymorphisms of the CCL5 gene and nonemphysematous phenotype in COPD patients. Eur Respir J 2008; 32:372-8. [PMID: 18385174 DOI: 10.1183/09031936.00115307] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
It was previously reported that the gain-of-function -28 guanine allele of the promoter single nucleotide polymorphism (SNP; cytosine to guanine substitution of nucleotide -28 (-28C>G)) in the CC chemokine ligand 5 gene (CCL5) was associated with susceptibility to late-onset asthma in patients who developed asthma at age > or =40 yrs. The clinical diagnosis of chronic obstructive pulmonary disease (COPD) includes emphysema and small airway disease, and upregulation of CCL5 has been described in the airways of patients with COPD. It was hypothesised that CCL5 has a genetic impact upon the variable expression of emphysema in patients with COPD. Patients with COPD were studied (n = 267). All of the patients underwent pulmonary high-resolution computed tomography (CT), and visual scoring (CT score) was performed to determine emphysema severity. Three SNPs of CCL5 were genotyped, including -403G>A, -28C>G and 375T>C. A significant difference was found in CT score according to CCL5 genotype; the -28G allele was inversely associated with CT score. When the analysis was confined to 180 patients with bronchial reversibility of <15%, even stronger evidence for this association was noted. Functional single nucleotide polymorphisms in the CC chemokine ligand 5 gene were associated with milder emphysema. Together with previous findings, the present study may identify the CC chemokine ligand 5 gene as part of a common pathway in the pathogenesis of late-onset asthma and chronic obstructive pulmonary disease with milder emphysema.
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Affiliation(s)
- N Hizawa
- First Dept of Medicine, Hokkaido University School of Medicine, N-15 W-7, Kita-Ku, Sapporo 060-8638, Japan
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Hasegawa M, Nasuhara Y, Onodera Y, Makita H, Betsuyaku T, Nishimura M. Relationship of airway dimensions with airflow limitation or lung volumes in chronic obstructive pulmonary disease (COPD). Eur Respir Rev 2006. [DOI: 10.1183/09059180.00010133] [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: 11/05/2022] Open
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Takeda M, Makita H, Ohno K, Nakahara Y, Koizumi JI. Structural analysis of the sheath of a sheathed bacterium, Leptothrix cholodnii. Int J Biol Macromol 2005; 37:92-8. [PMID: 16214212 DOI: 10.1016/j.ijbiomac.2005.09.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2005] [Revised: 09/02/2005] [Accepted: 09/06/2005] [Indexed: 11/16/2022]
Abstract
Leptothrix cholodnii is an aerobic sheath-forming bacterium often found in oligotrophic and metal-rich aquatic environments. The sheath of this bacterium was isolated by selectively lysing the cells. Glycine and cysteine were the major amino acids of the sheath. The sheath was readily dissolved in hydrazine, and a polysaccharide substituted with cysteine was recovered from the solution. Galactosamine, glucosamine and galacturonic acid were detected in the hydrazinolysate by gas liquid chromatography analysis. FAB-MS analysis of the hydrazinolysate suggested a sugar sequence of HexN-GalA-HexN-HexN. Methylation linkage analysis revealed the presence of 4-linked GalA, 3-linked HexN and 4-linked HexN. The sulfhydryl groups of the sheath were used for labeling with the fluorogenic reagent, 4-(aminosulfonyl)-7-fluoro-2,1,3-benzoxadiazole (ABD-F). The labeled sheath (ABD-sheath) was partially hydrolyzed and three fluorescent fragments were purified by HPLC. One of them was identified as ABD-cysteine. The second one was found to be the ABD-cysteine tetramer. Another fragment was indicated to be a pentasaccharide substituted with ABD-cysteine by nuclear magnetic resonance (NMR) analysis. It can be assumed that the polysaccharide and peptide moieties of the sheath are connected by a cysteine residue. NMR analysis of the hydrazinolysate revealed that the polysaccharide moiety of the sheath was constructed from a pentasaccharide repeating unit containing 2-amino-2-deoxygalacturonic acid (GalNA), as shown below. -->4)-alpha-GalNA-(1-->4)-alpha-D-GalN(p)-(1-->4)-alpha-D-GalA(p)-(1-->4)-beta-D-GlcN(p)-(1-->3)-beta-D-GalN(p)-(1-->.
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Affiliation(s)
- Minoru Takeda
- Division of Materials Science and Chemical Engineering, Faculty of Engineering, Yokohama National University, Tokiwadai 79-5, Hodogaya, Yokohama 240-8501, Japan.
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Toida M, Shimokawa K, Makita H, Kato K, Kobayashi A, Kusunoki Y, Hatakeyama D, Fujitsuka H, Yamashita T, Shibata T. Intraoral minor salivary gland tumors: a clinicopathological study of 82 cases. Int J Oral Maxillofac Surg 2005; 34:528-32. [PMID: 16053873 DOI: 10.1016/j.ijom.2004.10.010] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2004] [Revised: 07/12/2004] [Accepted: 10/19/2004] [Indexed: 10/25/2022]
Abstract
We present a retrospective study of 82 patients with intraoral minor salivary gland tumors which were diagnosed from 1979 to 2003 in Gifu University Hospital. The histological diagnoses were reevaluated according to the 1991 WHO classification. A total of 82 tumors, consisting of 55 benign and 27 malignant tumors, were found in 28 male and 54 female Japanese patients; the male-to-female ratio was 1:1.9. The mean age of the patients was 51.4+/-18.1 years. The tumors affected the palate (n = 64), the buccal region (n = 10), the upper lip (n = 6), the floor of the mouth (n = 1), and the retromolar region (n = 1). Histologically, the tumors were classified as pleomorphic adenoma (n = 54), papillary cystadenoma (n = 1), adenoid cystic carcinoma (n = 10), mucoepidermoid carcinoma (n = 8), acinic cell carcinoma (n = 3), adenocarcinoma (n = 2), basal cell adenocarcinoma (n = 1), papillary cystadenocarcinoma (n = 1), and carcinoma in pleomorphic adenoma (n = 2). From the results of the present study and review of the literature, it is suggested that the minor salivary gland tumors in Japan may be characterized by a higher incidence of benign tumors, especially of pleomorphic adenoma; a more marked tendency for female predominance; a higher incidence of palatal involvement; and a rarer occurrence of polymorphous low grade adenocarcinoma, in comparison with those reported in the literature from outside of Japan.
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Affiliation(s)
- M Toida
- Department of Oral and Maxillofacial Sciences, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu 501-1194, Japan.
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Sekiguchi Y, Makita H, Yamamura A, Matsumoto K. A thermostable histamine oxidase from Arthrobacter crystallopoietes KAIT-B-007. J Biosci Bioeng 2004; 97:104-10. [PMID: 16233600 DOI: 10.1016/s1389-1723(04)70176-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2003] [Accepted: 11/05/2003] [Indexed: 11/29/2022]
Abstract
A thermostable histamine oxidase (EC 1.4.3.-) was found in cells of Arthrobacter crystallopoietes KAIT-B-007 isolated from soil. The enzyme was purified about 715-fold over the cell free extracts with a yield of 55% by ammonium sulfate fractionation and various column chromatographies. The purified enzyme was homogeneous on polyacrylamide gel-electrophoresis (native-PAGE). When the enzyme was kept at 65 degrees C and 70 degrees C for 10 min, the activity was fully stable at 65 degrees C and decreased to 9% of the initial level at 70 degrees C. The enzyme was very thermostable. The optimum pH for histamine oxidase activity was found to be at 9.0, and the enzyme was stable over the pH range of 6 to 9. The purified enzyme showed a single protein band on SDS-PAGE and its molecular mass was estimated to be about 81 kDa. The enzyme showed potent activity toward histamine, whereas it was inactive toward putrescine, cadaverine, spermine, and spermidine. Histamine oxidase was inhibited by N,N-diethyldithiocarbamate (DDTC). The inactive enzyme was restored with Cu2+ to 65% of the initial activity, but Cu+ did not enhance the enzyme activity. It is suggested that Cu2+ is essential for expression of histamine oxidase activity. The enzyme was a copper-containing protein having one atom of copper per mol of the enzyme protein as a result of atomic absorption analysis. The N-terminal amino acid sequence of the purified enzyme was different from that of histamine oxidase from Arthrobacter globiformis IFO12137.
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Affiliation(s)
- Yoshinori Sekiguchi
- Department of Applied Chemistry, Faculty of Engineering, Kanagawa Institute of Technology, Atsugi, Kanagawa 243-0292, Japan
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31
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Sato M, Takagi T, Okamoto R, Koshino T, Goto H, Ito J, Yamamoto K, Makita H, Hayashi T, Uesugi M, Saito T. Upregulation of CD44 expression on bovine articular chondrocytes induced by synthetic lipid A. Mod Rheumatol 2002. [DOI: 10.1007/s101650200003] [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: 11/29/2022]
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32
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Sato M, Takagi T, Okamoto R, Koshino T, Goto H, Ito J, Yamamoto K, Makita H, Hayashi T, Uesugi M, Saito T. Upregulation of CD44 expression on bovine articular chondrocytes induced by synthetic lipid A. Mod Rheumatol 2002; 12:18-23. [PMID: 24383827 DOI: 10.3109/s101650200003] [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: 11/13/2022]
Abstract
Abstract The purpose of the study reported in this article was to investigate effects of synthetic lipid A on the expression of adhesion molecule CD44 on bovine articular chondrocytes. Full-thickness bovine articular cartilage was dissected from the carpometacarpal joints of 24 cows. Cartilage pieces were enzymatically digested to liberate chondrocytes. The chondrocytes were incubated in the presence of synthetic lipid A in suspension culture. Cell characteristics and binding of monoclonal antihuman CD44 antibodies were assessed with a flow cytometer. The expression of CD44 mRNA in chondrocytes was detected by reverse transcription-polymerase chain reaction (RT-PCR) technique. PCR products were quantified with a charge-coupled device image sensor. The percentage of CD44-positive chondrocytes was 42.2% ± 12.0%, 51.7% ± 6.8%, and 51.1% ± 5.0%, in the presence of lipid A at 0.25 μg/ml, 2.5 μg/ml, and 25 μg/ml, respectively, whereas it was 39.2% ± 8.9% in the absence of lipid A. In flow cytometry, two subpopulations of chondrocytes were found in each of five separate experiments, one with smaller number of forward scatter (FS) and the other with larger number of FS. The percentage of CD44-positive cells was 24.8% ± 8.5% in the subpopulation with smaller number of FS and 31.9% ± 6.4% in the subpopulation with larger number of FS at time 24 h after incubation. The bacterial component, lipid A, upregulated expression of CD44 on articular chondrocytes.
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Affiliation(s)
- M Sato
- Department of Orthopaedic Surgery, Yokohama City University School of Medicine , 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004 , Japan
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Sekiguchi Y, Nishikawa A, Makita H, Yamamura A, Matsumoto K, Kiba N. Flow-through chemiluminescence sensor using immobilized histamine oxidase from Arthrobacter crystallopoietes KAIT-B-007 and peroxidase for selective determination of histamine. ANAL SCI 2001; 17:1161-4. [PMID: 11990588 DOI: 10.2116/analsci.17.1161] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A flow sensor with immobilized oxidases is proposed for the determination of histamine in fish meat. Chemiluminometric measurement of histamine was based on the luminol reaction with hydrogen peroxide produced by immobilized histamine oxidase (EC 1.4.3.-.) and peroxidase (EC 1.11.1.7.) within a flow cell. Histamine oxidase was found in cells of Arthrobacter crystallopoietes KAIT-B-007 isolated from soil. The oxidase and peroxidase were coimmobilized covalently on tresylated hydrophilic vinyl polymer beads and packed into transparent PTFE; the tubing was used as the flow cell. One assay for histamine was done at intervals of 2 min without carryover. The calibration curve for histamine was linear from 0.1 microM to 50 microM. The response was reproducible within 1.25% of the relative standard deviation for 115-replicate injections of 50 microM histamine. The sensor system was applied to the determination of histamine in fish meat extracts.
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Affiliation(s)
- Y Sekiguchi
- Department of Applied Chemistry, Faculty of Engineering, Kanagawa Institute of Technology, Atsugi, Japan
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Tsujino I, Nishimura M, Kamachi A, Makita H, Munakata M, Miyamoto K, Kawakami Y. Exhaled nitric oxide--is it really a good marker of airway inflammation in bronchial asthma? Respiration 2001; 67:645-51. [PMID: 11124647 DOI: 10.1159/000056294] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The concentration of exhaled nitric oxide ([NO]) has been reported to reflect the inflammatory process of airways in patients with bronchial asthma, particularly when they are steroid naive. However, it is not fully understood whether it equally reflects the degree of airway inflammation in patients receiving inhaled corticosteroids, but whose symptoms are not necessarily well controlled. OBJECTIVE To examine whether the exhaled [NO] really reflects airway inflammation in patients with bronchial asthma, regardless of treatment with inhaled steroids. METHODS Exhaled [NO] was measured in patients with bronchial asthma (43 steroid treated and 32 steroid naive), chronic obstructive pulmonary disease (COPD) (n = 36), bronchiectasis (n = 10) and in control subjects (n = 26). We examined in each asthmatic group whether the exhaled [NO] correlated with parameters reflecting airway inflammation. RESULTS Exhaled [NO] was significantly correlated with symptom score, clinical severity, circulating eosinophil count, and the percentage of eosinophils in induced sputum in the steroid-naive asthmatics, but not in the steroid-treated asthmatics, although airway inflammation in this group was not well controlled, as evidenced by clinical symptoms and the higher percentage of eosinophils in induced sputum. Exhaled [NO] from the patients with COPD (6.2 +/- 0. 7 ppb) or bronchiectasis (5.4 +/- 1.3 ppb) was not significantly increased compared with the controls (6.0 +/- 1.0 ppb), and was significantly lower than in the asthmatic patients as a whole (19.0 +/- 2.0 ppb). CONCLUSIONS Although exhaled [NO] is a useful marker of airway inflammation for differential diagnosis and evaluation of severity in steroid-naive patients with bronchial asthma, it may not be as useful in steroid-treated patients.
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Affiliation(s)
- I Tsujino
- First Department of Medicine, Hokkaido University, School of Medicine, Sapporo, Japan.
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Nakamura T, Ishimaru J, Mizui T, Kobayashi A, Toida M, Makita H, Iwata H, Shimokawa K. Osteosarcoma metastatic to the mandible: a case report. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2001; 91:452-4. [PMID: 11312462 DOI: 10.1067/moe.2001.113107] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A case of osteosarcoma that metastasized to the mandibular ramus from the femur in a 36-year-old man is presented. The patient was referred to us for the diagnosis and treatment of swelling of the left cheek. Radiologic examination showed a radiolucent lesion containing radiopaque areas within the left mandibular ramus. The patient previously suffered from a femoral small cell osteosarcoma, which was resected 71 months before our first examination. After induction of general anesthesia, a unilateral mandibulectomy and a simultaneous reconstruction using a titanium plate and an artificial condyle were performed. The postoperative course was uneventful, with satisfactory facial appearance and jaw function. The histopathologic features of the mandibular tumor were identical to those of the femoral tumor. Thus the mandibular lesion was diagnosed as a metastatic small cell osteosarcoma. At 27 months after the operation there had been no recurrence.
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Affiliation(s)
- T Nakamura
- Department of Oral and Maxillofacial Surgery, Gifu Prefectural Gifu Hospital, Japan
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36
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Makita H. [Blood coagulation disorders and anesthesia]. Masui 2000; 49 Suppl:S116-27. [PMID: 11215433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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Kawabata K, Tanaka T, Honjo S, Kakumoto M, Hara A, Makita H, Tatematsu N, Ushida J, Tsuda H, Mori H. Chemopreventive effect of dietary flavonoid morin on chemically induced rat tongue carcinogenesis. Int J Cancer 1999; 83:381-6. [PMID: 10495431 DOI: 10.1002/(sici)1097-0215(19991029)83:3<381::aid-ijc14>3.0.co;2-x] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.8] [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: 11/10/2022]
Abstract
The modifying effects of dietary exposure of the flavonoid morin on 4-nitroquinoline 1-oxide (4-NQO)-induced tongue tumorigenesis, the activities of phase II detoxifying enzymes glutathione S-transferase (GST) and quinone reductase (QR) in liver and tongue, and cell proliferation activity in tongue were investigated in male F344 rats. At 7 weeks of age, all animals except those treated with morin alone and control group were given 4-NQO (20 ppm) in drinking water for 8 weeks to induce oral neoplasms. Starting 7 days before 4-NQO exposure, experimental groups were fed experimental diets containing morin (100 and 500 ppm) for 10 weeks ("initiation feeding"). Starting 1 week after the cessation of exposure to 4-NQO, other experimental groups given 4-NQO and a basal diet were given experimental diets for 22 weeks ("post-initiation feeding"). At week 32 week, "initiation feeding" of morin caused a significant reduction in the incidence of tongue carcinoma (by 44-100%). "Post-initiation feeding" with morin also significantly decreased the frequency of tongue carcinoma (by 44%). Morin feeding elevated liver GST and QR activities and GST activity in the anterior portion of tongue. Feeding with morin significantly lowered QR activity of the posterior part of the tongue. Dietary exposure to morin significantly decreased the proliferating cell nuclear antigen-positive index in the posterior portion. Also, morin feeding lowered tongue polyamine levels, especially in the "post-initiation feeding" group. Our results indicate that morin acts as a chemopreventive agent against tongue carcinogenesis induced by 4-NQO through modification of detoxifying enzyme activities and/or cell proliferation activities.
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Affiliation(s)
- K Kawabata
- Department of Pathology, Gifu University School of Medicine, Gifu, Japan
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Tanaka T, Kawabata K, Kakumoto M, Makita H, Ushida J, Honjo S, Hara A, Tsuda H, Mori H. Modifying effects of a flavonoid morin on azoxymethane-induced large bowel tumorigenesis in rats. Carcinogenesis 1999; 20:1477-84. [PMID: 10426795 DOI: 10.1093/carcin/20.8.1477] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The modifying effect of dietary exposure to a flavonoid morin during the initiation and post-initiation phases of azoxymethane (AOM)-initiated colorectal carcinogenesis was investigated in male F344 rats. A total of 55 animals were initiated with AOM by weekly s. c. injections of 15 mg/kg body wt for 3 weeks to induce colorectal neoplasms. Rats were fed a diet containing 500 p.p.m. morin for 5 ('initiation feeding') or 28 ('post-initiation feeding') weeks. Other groups contained rats treated with morin alone (500 p.p.m. in diet) and untreated rats. At the end of the study (32 weeks), the incidence of adenocarcinoma in the large intestine of rats initiated with AOM together with (43%) or followed by (29%) a diet containing morin was smaller than that of rats given AOM alone (75%). A significant difference was found between 'post-initiation feeding' and untreated groups (P = 0.023). Although both 'initiation feeding' and 'post-initiation feeding' of morin reduced polyamine levels in colorectal mucosa and blood, 'post-initiation feeding' of morin significantly decreased the proliferating cell nuclear antigen-positive index in aberrant crypt foci. 'Post-initiation feeding' of morin significantly elevated glutathione S-transferase and quinone reductase activities in the liver and large bowel, but 'initiation feeding' caused a significant elevation of these enzymes activities only in the large bowel. These results indicate that morin could exert a weak chemopreventive effect on large bowel tumorigenesis induced by AOM when fed during the post-initiation phase.
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Affiliation(s)
- T Tanaka
- First Department of Pathology and Department of Otolaryngology, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa 920-0293, Japan.
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Saito H, Nishimura M, Shinano H, Makita H, Tsujino I, Shibuya E, Sato F, Miyamoto K, Kawakami Y. Plasma concentration of adenosine during normoxia and moderate hypoxia in humans. Am J Respir Crit Care Med 1999; 159:1014-8. [PMID: 10051286 DOI: 10.1164/ajrccm.159.3.9803100] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Adenosine, a purine nucleoside, plays a variety of roles in cardiovascular and ventilatory control, and may be a marker of tissue hypoxia. There is, however, no direct evidence of an increase in plasma or in tissue levels of adenosine during moderate hypoxia in humans. We measured the plasma concentrations of adenosine in an artery and the median cubital vein simultaneously in 12 normal volunteers, and also in the internal jugular vein in seven of them during normoxia and moderate hypoxia (SaO2 = 80%, 20 min) with or without dipyridamole (0.6 mg/kg) pretreatment. Dipyridamole was expected to block reuptake of adenosine by red blood cells and vascular endothelial cells so that the plasma level of adenosine would more likely reflect the tissue level. Blood was sampled with an appropriate stopping solution, and adenosine was measured with a high-pressure liquid chromatographic (HPLC)-fluorometric technique. The plasma concentration of adenosine did not rise either in the artery or in the vein at any phase of hypoxia without the dipyridamole pretreatment. However, when subjects were pretreated with dipyridamole, the plasma concentration of adenosine increased significantly and markedly in a time-dependent manner during hypoxia in the vein, but not in the artery. The adenosine level rose from 20. 7 +/- 2.5 nM (mean +/- SE) during normoxia to 50.7 +/- 10.7 nM at 20 min of hypoxia, and returned to the baseline level in the recovery phase. The plasma concentration of adenosine in the jugular vein did not change during hypoxia either with or without dipyridamole pretreatment. These data provide evidence that in humans, the local production of adenosine increases during moderate hypoxia in forearm tissue, although this is not reflected in plasma unless the subject is pretreated with dipyridamole.
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Affiliation(s)
- H Saito
- First Department of Medicine, Hokkaido University School of Medicine, Sapporo, Japan
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40
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Makita H, Nishimura M, Miyamoto K, Nakano T, Tanino Y, Hirokawa J, Nishihira J, Kawakami Y. Effect of anti-macrophage migration inhibitory factor antibody on lipopolysaccharide-induced pulmonary neutrophil accumulation. Am J Respir Crit Care Med 1998; 158:573-9. [PMID: 9700137 DOI: 10.1164/ajrccm.158.2.9707086] [Citation(s) in RCA: 99] [Impact Index Per Article: 3.8] [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: 11/16/2022] Open
Abstract
Macrophage migration inhibitory factor (MIF) is a recently rediscovered pro-inflammatory cytokine that has the unique potential to override the anti-inflammatory action of glucocorticoids. Since recent reports suggest the pivotal role of MIF in acute lung injury, we examined the protective effect of anti-MIF antibody on lipopolysaccharide (LPS)-induced acute lung injury in rats. Rats were injected with LPS (7 mg/kg) intraperitoneally with or without pretreatment with anti-MIF antibody. The anti-MIF antibody significantly attenuated LPS-induced migration of neutrophils to the lungs at 4 and 24 h as demonstrated by observation of the number of neutrophils per alveolus, the activity of myeloperoxidase of the lung tissue, and cell differentiation of neutrophils in bronchoalveolar lavage (BAL) fluid. The increased level of macrophage inflammatory protein-2, a powerful neutrophil chemokine, in BAL fluid was also significantly attenuated by pretreatment with the anti-MIF antibody as compared with the control group. Additionally, positive immunostaining for MIF was observed in bronchial epithelial cells and alveolar macrophages, and Northern blot analysis of lung tissues demonstrated increased MIF mRNA 24 h after LPS injection. These data suggest that the anti-MIF antibody has therapeutic potential for the treatment of acute lung injury by suppressing the level of neutrophil chemokine in the lungs.
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Affiliation(s)
- H Makita
- First Department of Medicine and Central Research Institute, Hokkaido University School of Medicine, Sapporo, Japan.
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41
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Tanaka T, Kawabata K, Kakumoto M, Makita H, Hara A, Mori H, Satoh K, Hara A, Murakami A, Kuki W, Takahashi Y, Yonei H, Koshimizu K, Ohigashi H. Citrus auraptene inhibits chemically induced colonic aberrant crypt foci in male F344 rats. Carcinogenesis 1997; 18:2155-61. [PMID: 9395216 DOI: 10.1093/carcin/18.11.2155] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.7] [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: 02/05/2023] Open
Abstract
The modifying effect of dietary administration of auraptene isolated from the peel of citrus fruit (Citrus natsudaidai Hayata) on the development of azoxymethane (AOM)-induced colonic aberrant crypt foci (ACF) was investigated in rats. Male F344 rats were given s.c. injections of AOM (15 mg/kg body wt) once a week for 3 weeks to induce ACF. They also received diets containing 100 or 500 p.p.m. auraptene for 5 weeks, starting 1 week before the first dose of AOM. At termination of the study (week 5) dietary administration of auraptene caused a significant reduction in the frequency of ACF in a dose-dependent manner (P < 0.05). Feeding of auraptene suppressed expression of cell proliferation biomarkers (5-bromo-2'-deoxyuridine labeling-index, ornithine decarboxylase activity, polyamine content and number of silver stained nucleolar organizer region protein particles) in the colonic mucosa and the occurrence of micronuclei caused by AOM. Also, auraptene increased the activities of phase II enzymes (glutathione S-transferase and quinone reductase) in the liver and colon. These findings might suggest that inhibition of AOM-induced ACF may be associated, in part, with increased activity of phase II enzymes in the liver and colon and suppression of cell proliferation in the colonic mucosa.
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Affiliation(s)
- T Tanaka
- First Department of Pathology, Gifu University School of Medicine, Japan
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Tanaka T, Makita H, Kawabata K, Mori H, El-Bayoumy K. 1,4-phenylenebis(methylene)selenocyanate exerts exceptional chemopreventive activity in rat tongue carcinogenesis. Cancer Res 1997; 57:3644-8. [PMID: 9288763] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Among the organoselenium compounds, 1,4-phenylenebis(methylene) selenocyanate (p-XSC) is reported to exert the most effective chemopreventive effect on chemically induced carcinogenesis in the mammary glands, colon, and lung of laboratory animals. This study was designed to test the inhibitory effects of dietary p-XSC (5 and 15 ppm as selenium) during the initiation phase (1 week before, during, and up to 1 week after the carcinogen exposure) and the postinitiation phase (1 week after carcinogen administration until termination) on the formation of neoplasms of the tongue induced in male F344 rats by 4-nitroquinoline-1-oxide (4-NQO). The doses of p-XSC were 20% (5 ppm selenium) and 60% (15 ppm selenium) of maximum tolerated dose levels. At 6 weeks of age, all rats except those given p-XSC alone and those in untreated groups were treated with 4-NQO (20 ppm in the drinking water for 8 weeks). Dietary p-XSC, administered at selenium levels of 5 and 15 ppm during either the initiation or postinitiation phases, significantly reduced the incidence of carcinoma of the tongue. p-XSC was especially effective when it was administered at 15 ppm selenium during the postinitiation phase, in which case it completely inhibited the development of tongue carcinoma (from 47% in the dietary control to 0%). Glutathione S-transferase activities in the liver and tongue of rats treated with 4-NQO and p-XSC were significantly elevated compared to those in rats treated with 4-NQO alone. Similarly, quinone reductase activity was significantly elevated in the liver but decreased in the tongue (posterior portion). Such modulation by p-XSC in the phase II enzyme activities of the liver and tongue might be related to inhibition of the initiation. In addition, the expression of cell proliferation biomarkers, such as polyamine level, ornithine decarboxylase activity, 5-bromodeoxyuridin-labeling index, and argyrophilic nucleolar organizer's protein number, in the epithelium of the tongue was significantly reduced in rats that were fed thep-XSC diets compared to those who were fed the basal diet. Such alteration in cell proliferation through modulation of ornithine decarboxylase activity and polyamine biosynthesis in the tongue epithelium might be related to inhibition occurring in the postinitiation phase of carcinogenesis. The dose levels of p-XSC used induced no toxicity or alteration in body weight gain. Although the precise mechanisms of p-XSC-induced inhibition of tongue carcinogenesis remains to be elucidated, it is evident that p-XSC has powerful chemopreventive efficacy against tongue carcinogenesis.
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MESH Headings
- 4-Nitroquinoline-1-oxide
- Animals
- Anticarcinogenic Agents/therapeutic use
- Biomarkers
- Carcinogens
- Carcinoma, Squamous Cell/chemically induced
- Carcinoma, Squamous Cell/metabolism
- Carcinoma, Squamous Cell/pathology
- Carcinoma, Squamous Cell/prevention & control
- Drug Screening Assays, Antitumor
- Glutathione Transferase/metabolism
- Hyperplasia/chemically induced
- Hyperplasia/pathology
- Male
- NAD(P)H Dehydrogenase (Quinone)/metabolism
- Neoplasms, Experimental/chemically induced
- Neoplasms, Experimental/metabolism
- Neoplasms, Experimental/pathology
- Neoplasms, Experimental/prevention & control
- Organoselenium Compounds/therapeutic use
- Papilloma/chemically induced
- Papilloma/metabolism
- Papilloma/pathology
- Papilloma/prevention & control
- Polyamines/metabolism
- Precancerous Conditions/chemically induced
- Precancerous Conditions/metabolism
- Precancerous Conditions/pathology
- Precancerous Conditions/prevention & control
- Rats
- Rats, Inbred F344
- Tongue/drug effects
- Tongue/pathology
- Tongue Neoplasms/chemically induced
- Tongue Neoplasms/metabolism
- Tongue Neoplasms/pathology
- Tongue Neoplasms/prevention & control
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Affiliation(s)
- T Tanaka
- Department of Pathology, Gifu University School of Medicine, Gifu City, Japan
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Tanaka T, Kawabata K, Kakumoto M, Makita H, Matsunaga K, Mori H, Satoh K, Hara A, Murakami A, Koshimizu K, Ohigashi H. Chemoprevention of azoxymethane-induced rat colon carcinogenesis by a xanthine oxidase inhibitor, 1'-acetoxychavicol acetate. Jpn J Cancer Res 1997; 88:821-30. [PMID: 9369929 PMCID: PMC5921523 DOI: 10.1111/j.1349-7006.1997.tb00457.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.1] [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: 02/05/2023] Open
Abstract
In our studies to find natural compounds with chemopreventive efficacy in foods, using azoxymethane (AOM)-induced colonic aberrant crypt foci and colonic mucosal cell proliferation as biomarkers, a xanthine oxidase inhibitor, 1'-acetoxychavicol acetate (ACA), present in the edible plant Languas galanga from Thailand was found to be effective. This study was conducted to test the ability of ACA to inhibit AOM-induced colon tumorigenesis when it was fed to rats during the initiation or post-initiation phase. Male F344 rats were given three weekly s.c. injections of AOM (15 mg/kg body weight) to induce colonic neoplasms. They were fed diet containing 100 or 500 ppm ACA for 4 weeks, starting one week before the first dosing of AOM (the initiation feeding). The other groups were fed the ACA diet for 34 weeks, starting one week after the last AOM injection (the post-initiation feeding). At the termination of the study (week 38), AOM had induced 71% incidence of colonic adenocarcinoma (12/17 rats). The initiation feeding with ACA caused significant reduction in the incidence of colon carcinoma (54% inhibition by 100 ppm ACA feeding and 77% inhibition by 500 ppm ACA feeding, P = 0.03 and P = 0.001, respectively). The post-initiation feeding with ACA also suppressed the incidence of colonic carcinoma (45% inhibition by 100 ppm ACA feeding and 93% inhibition by 500 ppm ACA feeding, P = 0.06 and P = 0.00003, respectively). Such inhibition was dose-dependent and was associated with suppression of proliferation biomarkers, such as ornithine decarboxylase activity in the colonic mucosa, and blood and colonic mucosal polyamine contents. ACA also elevated the activities of phase II enzymes, glutathione S-transferase (GST) and quinone reductase (QR), in the liver and colon. These results indicate that ACA could inhibit the development of AOM-induced colon tumorigenesis through its suppression of cell proliferation in the colonic mucosa and its induction of GST and QR. The results confirm our previous finding that ACA feeding effectively suppressed the development of colonic aberrant crypt foci. These findings suggest possible chemopreventive ability of ACA against colon tumorigenesis.
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Affiliation(s)
- T Tanaka
- Department of Pathology, Gifu University School of Medicine
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Tanaka T, Makita H, Kawamori T, Kawabata K, Mori H, Murakami A, Satoh K, Hara A, Ohigashi H, Koshimizu K. A xanthine oxidase inhibitor 1'-acetoxychavicol acetate inhibits azoxymethane-induced colonic aberrant crypt foci in rats. Carcinogenesis 1997; 18:1113-8. [PMID: 9163704 DOI: 10.1093/carcin/18.5.1113] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The modifying effect of dietary administration of a xanthine oxidase inhibitor 1'-acetoxychavicol acetate (ACA) present in an edible plant Languas galanga in Thailand on the development of azoxymethane (AOM)-induced colonic aberrant crypt foci (ACF) was investigated in rats. Male F344 rats were given s.c. injections of AOM (15 mg/kg body wt) once a week for 3 weeks to induce colonic ACF. They were fed the diets containing 100 or 200 ppm ACA for 5 weeks, starting 1 week before the first dosing of AOM. At the termination of the study (week 5), AOM induced 118 +/- 28 ACF/colon. Dietary administration of ACA caused significant reduction in the frequency of ACF (41% inhibition by 100 ppm ACA feeding and 37% inhibition by 200 ppm ACA feeding, P<0.01). Such inhibition might be associated with suppression of the proliferation biomarkers' expression such as ornithine decarboxylase activity in the colonic mucosa, number of silver-stained nucleolar organizer regions' protein in the colonic mucosal cell nuclei and blood polyamine content. These results indicate that ACA could inhibit the development of AOM-induced ACF through its suppression of cell proliferation in the colonic mucosa and ACA might be a possible chemopreventive agent against colon tumourigenesis.
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Affiliation(s)
- T Tanaka
- First Department of Pathology, Gifu University School of Medicine, Tsukasa-machi, Japan
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45
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Tanaka T, Makita H, Kawabata K, Mori H, Kakumoto M, Satoh K, Hara A, Sumida T, Tanaka T, Ogawa H. Chemoprevention of azoxymethane-induced rat colon carcinogenesis by the naturally occurring flavonoids, diosmin and hesperidin. Carcinogenesis 1997; 18:957-65. [PMID: 9163681 DOI: 10.1093/carcin/18.5.957] [Citation(s) in RCA: 221] [Impact Index Per Article: 8.2] [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: 02/04/2023] Open
Abstract
The modulating effects of dietary feeding of two flavonoids, diosmin and hesperidin, both alone and in combination, during the initiation and post-initiation phases on colon carcinogenesis initiated with azoxymethane (AOM), were investigated in male F344 rats. Animals were initiated with AOM by weekly s.c. injections of 15 mg/kg body wt for 3 weeks to induced colon neoplasms. Rats were fed the diets containing diosmin (1000 ppm), hesperidin (1000 ppm) or diosmin (900 ppm) + hesperidin (100 ppm) for 5 weeks (initiation treatment) or 28 weeks (post-initiation treatment). The others contained the groups of rats treated with diosmin, hesperidin alone or in combination, and untreated. At the end of the study (32 weeks), the incidence and multiplicity of neoplasms (adenoma and adenocarcinoma) in the large intestine of rats initiated with AOM together with, or followed by, a diet containing diosmin or hesperidin were significantly smaller than those of rats given AOM alone (P <0.001). The combination regimen during the initiation and post-initiation stages also inhibited the development of colonic neoplasms, but the tumor data did not indicate any beneficial effect of diosmin and hesperidin administered together as compared with when these agents were given individually. In addition, feeding of diosmin and hesperidin, both alone and in combination, significantly inhibited the development of aberrant crypt foci. As for cell proliferation biomarkers, dietary exposure of diosmin and hesperidin significantly decreased the 5'-bromodeoxyuridine-labeling index and argyrophilic nuclear organizer region's number in crypt cells, colonic mucosal ornithine decarboxylase activity, and polyamine levels in the blood. These results indicate that diosmin and hesperidin, both alone and in combination, act as a chemopreventive agent against colon carcinogenesis, and such effects may be partly due to suppression of cell proliferation in the colonic crypts, although precise mechanisms should be clarified.
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Affiliation(s)
- T Tanaka
- The First Department of Pathology, Gifu University School of Medicine, Gifu City, Japan
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Hommura F, Nishimura M, Oguri M, Makita H, Hosokawa K, Saito H, Miyamoto K, Kawakami Y. Continuous versus bilevel positive airway pressure in a patient with idiopathic central sleep apnea. Am J Respir Crit Care Med 1997; 155:1482-5. [PMID: 9105099 DOI: 10.1164/ajrccm.155.4.9105099] [Citation(s) in RCA: 24] [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] [Indexed: 02/04/2023] Open
Abstract
A 57-yr-old man with idiopathic central apnea is reported. He presented at our hospital complaining of excessive daytime sleepiness. Polysomnography, including esophageal pressure monitoring, confirmed central sleep apnea with an apnea index of 27/h. He had mild non-insulin-dependent diabetes mellitus (NIDDM) but no signs of diabetic neuropathy or other background diseases. The ventilatory responses to hypoxia and hypercapnia tested while he was awake indicated increased respiratory chemosensitivity. We applied nasal continuous positive airway pressure (CPAP) and bilevel positive airway pressure (BPAP) in an attempt to compare the possible difference in therapeutic efficacy. Although nasal CPAP completely reversed central apnea, nasal BPAP adversely affected both apnea length and frequency in an applied pressure-dependent manner. Arterial blood gas analyses while he was being treated indicted alveolar hypoventilation with CPAP and hyperventilation with BPAP. Additionally, administration of a mixed gas containing 5% CO2 through a face mask had a significant effect on the disappearance of central apnea in this patient. These findings support the theory that the arterial PCO2 level is critical in generating idiopathic central apnea and that nasal CPAP therapy may be effective in eliminating central apnea by raising the PaCO2.
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Affiliation(s)
- F Hommura
- First Department of Medicine, Hokkaido University School of Medicine, Kita-ku, Sapporo, Japan
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47
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Tanaka T, Makita H, Kawabata K, Mori H, Kakumoto M, Satoh K, Hara A, Sumida T, Fukutani K, Tanaka T, Ogawa H. Modulation of N-methyl-N-amylnitrosamine-induced rat oesophageal tumourigenesis by dietary feeding of diosmin and hesperidin, both alone and in combination. Carcinogenesis 1997; 18:761-9. [PMID: 9111212 DOI: 10.1093/carcin/18.4.761] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.8] [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: 02/04/2023] Open
Abstract
The modifying effects of flavonoids diosmin and hesperidin during the initiation and post-initiation phases of oesophageal carcinogenesis initiated with N-methyl-N-amylnitrosamine (MNAN) were investigated in male Wistar rats. At 7 weeks of age, all animals except those treated each test chemical alone and control groups were given weekly intraperitoneal injections of MNAN (12.5 mg/kg body weight/injection) for 12 weeks to induce oesophageal neoplasms. For examining the modifying effects of 'initiation' treatment of test compounds, groups of animals were fed the diets containing 1000 ppm diosmin and 1000 ppm hesperidin, and the diet containing both compounds (900 ppm diosmin and 100 ppm hesperidin) for 13 weeks, starting 7 days before the MNAN dosing and then switched to the basal diet. For examining the modifying effects of 'post-initiation' treatment of these compounds, the groups given MNAN and a basal diet were switched to the experimental diets containing diosmin, hesperidin or diosmin combined with hesperidin at 1 week after the stop of MNAN injection, and maintained on these diets for 7 weeks. The other groups consisted of rats given test compounds alone or untreated rats. All animals were necropsied at the termination of the study (week 20) to determine the incidences of oesophageal neoplasms and preneoplasms, blood polyamine levels, and cell proliferation activity estimated by 5-bromodeoxyuridine (BrdU)-labelling index and by morphometric analysis of silver-stained nucleolar organizer regions' protein (AgNORs). A number of oesophageal neoplasms developed in rats treated with MNAN alone (75% and 100% incidences of carcinoma and papilloma, respectively). 'Initiation' feeding of diosmin significantly decreased the incidence of squamous cell carcinoma (P < 0.05). Also, 'initiation feeding' of both compounds singly or in combination caused a significant reduction in the multiplicities of oesophageal carcinoma and papilloma (diosmin, 78 and 58% reduction; hesperidin, 70 and 50% reduction; and the combination regimen, 70 and 30% reduction, P < 0.005). 'Post-initiation' feeding slightly decreased the multiplicities of these oesophageal neoplasms. Also, these dietary regimens reduced the multiplicities of preneoplastic lesions (hyperplasia and severe dysplasia; P < 0.05). There were no pathological alterations in rats treated with both compounds alone or the combined regimen alone or those in an untreated control group. Similarly, feeding of these compounds significantly decreased the expression of cell proliferation biomarkers (BrdU-labelling index and AgNORs number) of the non-lesional oesophageal epithelium (P < 0.05). Blood polyamine concentrations were also lowered in rats given the carcinogen and test compounds, both alone and in combination, when compared with those of rats given MNAN alone (P < 0.05). These findings suggest that diosmin and hesperidin supplementation, individually or in combination, is effective in inhibiting the development of oesophageal cancer induced by MNAN when given during the initiation phase, and such inhibition might be related to suppression of increased cell proliferation caused by MNAN in the oesophageal mucosa.
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Affiliation(s)
- T Tanaka
- First Department of Pathology, Gifu University School of Medicine, Gifu City, Japan
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Tanaka T, Makita H, Ohnishi M, Mori H, Satoh K, Hara A, Sumida T, Fukutani K, Tanaka T, Ogawa H. Chemoprevention of 4-nitroquinoline 1-oxide-induced oral carcinogenesis in rats by flavonoids diosmin and hesperidin, each alone and in combination. Cancer Res 1997; 57:246-52. [PMID: 9000563] [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: 02/03/2023]
Abstract
The modifying effects of the two flavonoids diosmin and hesperidin given during the initiation and postinitiation phases of oral carcinogenesis initiated with 4-nitroquinoline 1-oxide (4-NQO) were investigated in male F344 rats. The compounds were tested alone and in combination. At 6 weeks of age, animals were divided into experimental and control groups and fed diets containing 1000 ppm diosmin and 1000 ppm hesperidin and a diet containing both compounds (900 ppm diosmin and 100 ppm hesperidin). At 7 weeks of age, all animals except those treated with each test chemical alone and control groups were given 4-NQO (20 ppm) in the drinking water for 8 weeks to induce oral cancer. Starting 7 days before the 4-NQO exposure, groups of animals were fed the diets containing test chemicals for 10 weeks and then switched to the basal diet. Starting 1 week after the cessation of 4-NQO exposure, the groups given 4-NQO and a basal diet were switched to the diets containing diosmin, hesperidin, or diosmin combined with hesperidin and maintained on these diets for 22 weeks. The other groups consisted of rats given diosmin (1000 ppm), hesperidin (1000 ppm), and the combination regimen of these two compounds (900 ppm diosmin with 100 ppm hesperidin) alone, and untreated rats. All animals were necropsied at the termination of the study (week 32). The incidences of tongue lesions (neoplasms and preneoplasms), polyamine levels in the tongue tissue, and cell proliferation activity estimated by a 5-bromodeoxyuridine-labeling index and by morphometric analysis of silver-stained nucleolar organizer regions protein were compared among the groups. Feeding of both compounds singly or in combination during the initiation phase caused a significant reduction in the frequency of tongue carcinoma [diosmin, 68% reduction (P < 0.01); hesperidin, 75% reduction (P < 0.005); and the combination regimen, 69% (P < 0.05)]. When fed the test compounds singly or the combination regimen after 4-NQO exposure, the frequency of tongue cancer was also decreased [diosmin, 77% reduction (P < 0.005); hesperidin, 62% reduction (P < 0.05); and the combination regimen, 77% (P < 0.005)]. The incidences of oral preneoplasia (hyperplasia and dysplasia) in these groups were also decreased when compared with carcinogen controls (P < 0.05-P < 0.001). There were no pathological alterations in rats treated with test compounds or the combined regimen alone or those in an untreated control group. Dietary administration of these compounds significantly decreased the expression of cell proliferation biomarkers (5-bromodeoxyuridine-labeling index and silver-stained nucleolar organizer regions protein number) of the nonlesional tongue squamous epithelium (P < 0.05). Also, polyamine concentrations in the oral mucosa were lowered in rats given the carcinogen and test compounds, alone and in combination, compared with those of rats given 4-NQO alone (P < 0.05). These findings suggest that supplementation with the flavonoids diosmin and hesperidin, individually and in combination, is effective in inhibiting the development of oral neoplasms induced by 4-NQO, and such inhibition might be related to suppression of increased cell proliferation caused by 4-NQO in the oral mucosa.
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Affiliation(s)
- T Tanaka
- First Department of Pathology, Gifu University School of Medicine, Japan
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Sugie S, Okamoto K, Ohnishi M, Makita H, Kawamori T, Watanabe T, Tanaka T, Nakamura YK, Nakamura Y, Tomita I, Mori H. Suppressive effects of S-methyl methanethiosulfonate on promotion stage of diethylnitrosamine-initiated and phenobarbital-promoted hepatocarcinogenesis model. Jpn J Cancer Res 1997; 88:5-11. [PMID: 9045889 PMCID: PMC5921254 DOI: 10.1111/j.1349-7006.1997.tb00294.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [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: 02/03/2023] Open
Abstract
Modifying effects of S-methyl methanethiosulfonate (MMTS) on diethylnitrosamine (DEN)-initiated and phenobarbital (PB)-promoted hepatocarcinogenesis were examined in rats. Five-week-old male F344 rats were divided into 8 groups. After a week, groups 1-5 were given DEN (100 mg/kg body weight, i.p.) once a week for 3 weeks, whereas groups 6-8 received vehicle treatment. Group 2 was given 100 ppm MMTS containing diet in the initiation phase. From 4 weeks after the start of experiment, groups 3 and 5 were fed MMTS, and groups 1-3 and 7 received drinking water containing 500 ppm PB. Group 6 was given MMTS diet alone throughout the experiment (24 weeks). The incidences of hepatocellular adenoma and total liver tumors were significantly smaller in group 3 than those of group 1. The average numbers of hepatocellular adenoma, carcinoma and total tumors in group 3 were significantly smaller than in group 1. Glutathione S-transferase placental form-positive foci were also significantly decreased by MMTS treatment in the promotion phase. MMTS treatment in the initiation or promotion phase reduced ornithine decarboxylase activity in the liver of rats given DEN. The antioxidant activity against lipid peroxidation of MMTS was confirmed in tests with rabbit erythrocyte membrane ghosts or rat hepatocytes. These results suggest that MMTS is a promising chemopreventive agent for liver neoplasia when concurrently administered with PB.
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Affiliation(s)
- S Sugie
- Department of Pathology, Institute of Laboratory Animals, Gifu University School of Medicine, Tsukasa-machi
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Makita H, Tanaka T, Fujitsuka H, Tatematsu N, Satoh K, Hara A, Mori H. Chemoprevention of 4-nitroquinoline 1-oxide-induced rat oral carcinogenesis by the dietary flavonoids chalcone, 2-hydroxychalcone, and quercetin. Cancer Res 1996; 56:4904-9. [PMID: 8895742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The modifying effects of dietary exposure of three flavonoids, chalcone, 2-hydroxychalcone, and quercetin, during the initiation and postinitiation phases of oral tumorigenesis initiated with 4-nitroquinoline-1-oxide (4-NQO) were investigated in male F344 rats. At 6 weeks of age, animals were divided into experimental and control groups. At 7 weeks of age, all animals except those treated with test chemicals alone and the untreated control group were given 4-NQO [20 parts/million (ppm)] in the drinking water for 8 weeks to induce oral neoplasms. For chemopreventive study by feeding of test compounds during the initiation phase, groups of animals were given diets containing 500 ppm chalcone, 500 ppm 2-hydroxychalcone, or 500 ppm quercetin for 10 weeks, starting 1 week before 4-NQO exposure. Seven days after stopping 4-NQO exposure, these groups were switched to the basal diet and kept on this diet until the end of the experiment. For chemopreventive study by treatment with test chemicals during the postinitiation phase, starting 1 week after the cessation of 4-NQO administration, the groups given 4-NQO and the basal diet were switched to the diets mixed with test chemicals and maintained on these diets for 22 weeks. The other groups consisted of rats fed diets containing 500 ppm test chemicals alone or of untreated rats. Thirty-two weeks after the start of the study, the incidence of tongue neoplasms and preneoplastic lesions, polyamine levels in the tongue epithelium, and cell proliferation activity estimated by bromodeoxyuridine labeling index were compared among the different dietary groups. Feeding of all test chemicals during either initiation or postinitiation phases caused a significant reduction in the frequency of tongue carcinoma (68-88% reduction; P < 0.05). Dietary administration of these test chemicals also significantly decreased the bromodeoxyuridine labeling index of the tongue squamous epithelium (P < 0.05). In addition, polyamine levels in the oral mucosa were lowered in rats treated with 4-NQO and test chemicals when compared to those given 4-NQO alone. These results indicate that the flavonoids chalcone, 2-hydroxychalcone, and quercetin present in our daily foods have an inhibitory effect on oral carcinogenesis initiated with 4-NQO, and such a modifying effect may be related partly to the suppression of cell proliferation.
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Affiliation(s)
- H Makita
- Department of Oral and Maxillo-Facial Surgery, Gifu University School of Medicine, Japan
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