1
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Mitsuyasu Y, Oka T, Takahashi A, Kino Y, Okutsu K, Sekine T, Yamashita T, Shimizu Y, Chiba M, Suzuki T, Osaka K, Sasaki K, Suzuki M, Fukumoto M, Shinoda H. Estimation of external dose for wild Japanese macaques captured in Fukushima prefecture: decomposition of electron spin resonance spectrum. Radiat Prot Dosimetry 2023; 199:1620-1625. [PMID: 37721074 DOI: 10.1093/rpd/ncad146] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 03/28/2023] [Accepted: 04/05/2023] [Indexed: 09/19/2023]
Abstract
The signal intensities of CO2- radicals in teeth can be utilised as an individual indicator of the cumulative external dose for animals. To accurately determine the external dose, it is desirable to analyse the CO2- radical intensity and improve its detection limit. We recently reported a dose-response in the range of 0-200 mGy and estimated the absorbed dose for seven wild Japanese macaques captured in/around the related areas to the Fukushima Daiichi Nuclear Power Plant accident. Herein, for further improvement of this method, we examined the electron spin resonance spectra of the teeth of these seven and an additional four macaques captured in Fukushima by applying two spectrum-decomposition algorithms.
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Affiliation(s)
- Yusuke Mitsuyasu
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - Toshitaka Oka
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Atsushi Takahashi
- Tohoku University Hospital, Tohoku University, Sendai, Miyagi 980-8574, Japan
| | - Yasushi Kino
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - Kenichi Okutsu
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - Tsutomu Sekine
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - Takuma Yamashita
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
- Institute for Excellence in Higher Education, Tohoku University, Sendai, Miyagi 980-8576, Japan
| | - Yoshinaka Shimizu
- Graduate School of Dentistry, Tohoku University, Sendai, Miyagi 980-8575, Japan
| | - Mirei Chiba
- Graduate School of Dentistry, Tohoku University, Sendai, Miyagi 980-8575, Japan
| | - Toshihiko Suzuki
- Graduate School of Dentistry, Tohoku University, Sendai, Miyagi 980-8575, Japan
| | - Ken Osaka
- Graduate School of Dentistry, Tohoku University, Sendai, Miyagi 980-8575, Japan
| | - Keiichi Sasaki
- Graduate School of Dentistry, Tohoku University, Sendai, Miyagi 980-8575, Japan
| | - Masatoshi Suzuki
- International Research Institute of Disaster Science, Tohoku University, Sendai, Miyagi 980-8572, Japan
| | - Manabu Fukumoto
- International Research Institute of Disaster Science, Tohoku University, Sendai, Miyagi 980-8572, Japan
- Center for Advanced Intelligence Project, RIKEN, Nihonbashi, Tokyo 103-0027, Japan
| | - Hisashi Shinoda
- Graduate School of Dentistry, Tohoku University, Sendai, Miyagi 980-8575, Japan
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2
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Fujino T, Suda K, Koga T, Hamada A, Ohara S, Chiba M, Shimoji M, Takemoto T, Soh J, Mitsudomi T. EP08.02-146 Proposal of Foretinib as Second-Line TKI after Capmatinib/Tepotinib Treatment Failure in NSCLC with MET Exon 14 Mutation. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.829] [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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3
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Oka T, Takahashi A, Koarai K, Kino Y, Sekine T, Shimizu Y, Chiba M, Suzuki T, Osaka K, Sasaki K, Shinoda H. Detection limit of electron spin resonance for Japanese deciduous tooth enamel and density separation method for enamel-dentine separation. J Radiat Res 2022; 63:609-614. [PMID: 35780302 PMCID: PMC9303628 DOI: 10.1093/jrr/rrac033] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 08/27/2021] [Indexed: 06/15/2023]
Abstract
Electron spin resonance (ESR) dosimetry is one of the most powerful tools for radiation dose reconstruction. The detection limit of this technique using human teeth is reported to be 56 mGy or 67 mGy; however, the absorbed dose of Fukushima residents after the Fukushima Daiichi Nuclear Power Plant (FNPP) accident was estimated to be lower than this detection limit. Our aim is to assess the absorbed radiation dose of children in Fukushima Prefecture after the accident; therefore, it is important to estimate the detection limit for their teeth. The detection limit for enamel of deciduous teeth of Japanese children separated by the mechanical method is estimated to be 115.0 mGy. The density separation method can effectively separate enamel from third molars of Japanese people. As we have collected thousands of teeth from children in Fukushima, the present technique may be useful to examine their external absorbed dose after the FNPP accident.
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Affiliation(s)
- Toshitaka Oka
- Corresponding author. Research Group for Nuclear Chemistry, Chemistry, Environment and Radiation Division, Nuclear Science and Engineering Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan.
| | - Atsushi Takahashi
- Tohoku University Hospital, Tohoku University, 1-1 Seiryo-machi, Aoba-ku, Sendai City, Miyagi 980-8574, Japan
| | - Kazuma Koarai
- Collaborative Laboratories for Advanced Decommissioning Science, Sector of Fukushima Research and Development, Japan Atomic Energy Agency, 790-1 Ohtsuka, Motooka, Tomioka Town, Futaba County, Fukushima 979-1151, Japan
| | - Yasushi Kino
- Institute for Excellence in Higher Education, Tohoku University, 41 Kawauchi, Aoba-ku, Sendai City, Miyagi 980-8576, Japan
| | - Tsutomu Sekine
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-aoba, Aoba-ku, Sendai City, Miyagi 980-8578, Japan
- Institute for Excellence in Higher Education, Tohoku University, 41 Kawauchi, Aoba-ku, Sendai City, Miyagi 980-8576, Japan
| | - Yoshinaka Shimizu
- Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai City, Miyagi 980-8575, Japan
| | - Mirei Chiba
- Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai City, Miyagi 980-8575, Japan
| | - Toshihiko Suzuki
- Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai City, Miyagi 980-8575, Japan
| | - Ken Osaka
- Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai City, Miyagi 980-8575, Japan
| | - Keiichi Sasaki
- Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai City, Miyagi 980-8575, Japan
| | - Hisashi Shinoda
- Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai City, Miyagi 980-8575, Japan
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4
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Jiang CM, Duangthip D, Auychai P, Chiba M, Folayan MO, Hamama HHH, Kamnoedboon P, Lyons K, Matangkasombut O, Mathu-Muju KR, Mathur VP, Mei ML, Morgan M, Poolthong S, Rahul M, Srinivasan M, Takahashi T, Yaklai S, Zhang S, Zou XC, Chu CH, Lo ECM. Changes in Oral Health Policies and Guidelines During the COVID-19 Pandemic. Front Oral Health 2022; 2:668444. [PMID: 35048011 PMCID: PMC8757803 DOI: 10.3389/froh.2021.668444] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [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: 02/16/2021] [Accepted: 04/19/2021] [Indexed: 12/23/2022] Open
Abstract
The aim of this study was to describe the changes in oral health policies and guidelines in response to the Coronavirus disease 2019 (COVID-19) pandemic in different countries and regions around the world. Information on oral health policies and guidelines from 9 countries (Canada, China including Hong Kong, Egypt, India, Japan, New Zealand, Nigeria, Switzerland, and Thailand) were summarized, and sources of the information were mostly the national or regional health authorities and/or dental council/associations. The changes made to the oral health guidelines depended on the severity of the COVID-19 pandemic. This included suspension of non-emergency dental care services at the peak of the COVID-19 outbreak, and easing the restrictions on non-essential and elective dental care when the pandemic became under control. The COVID-19 risk mitigation strategies include strict adherence to infection control practices (use of hand sanitizers, facemask and maintaining social distancing), reducing the amount of aerosol production in the dental setting, and managing the quality of air in the dental treatment rooms by reducing the use of air conditioners and improving air exchange. The COVID-19 pandemic has shown a major impact on dental practice. Dental professionals are trying to adapt to the new norms, while the medium to long-term impact of COVID-19 on dentistry needs further investigation.
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Affiliation(s)
- Chloe Meng Jiang
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, China
| | | | - Prim Auychai
- Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Mirei Chiba
- Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | | | | | | | - Karl Lyons
- Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | | | | | - Vijay Prakash Mathur
- Department of Pediatric and Preventive Dentistry, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, India
| | - May Lei Mei
- Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - Mike Morgan
- Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - Suchit Poolthong
- Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Morankar Rahul
- Department of Pediatric and Preventive Dentistry, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, India
| | - Murali Srinivasan
- Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Tetsu Takahashi
- Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Sanicha Yaklai
- Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Shinan Zhang
- Affiliated Stomatological Hospital, School of Stomatology, Kunming Medical University, Kunming, China
| | - Xin Chun Zou
- Affiliated Stomatological Hospital, School of Stomatology, Kunming Medical University, Kunming, China
| | - Chun Hung Chu
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, China
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5
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Hamada A, Suda K, Ohara S, Chiba M, Shimoji M, Endo M, Takemoto T, Soh J, Shiono S, Mitsudomi T. P04.01 Presence of Ground Glass Opacity Component is True Determinant of Prognosis in Clinical Stage I Non-Small Cell Lung Cancer. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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6
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Ohara S, Mitsudomi T, Suda K, Fujino T, Koga T, Soh J, Takemoto T, Shimoji M, Nishino M, Chiba M, Hamada A. P76.71 RYK Confers Drug Tolerance to Osimertinib in Lung Cancer Cells with EGFR Mutations. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.1128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Oka T, Takahashi A, Koarai K, Mitsuyasu Y, Kino Y, Sekine T, Shimizu Y, Chiba M, Suzuki T, Osaka K, Sasaki K, Urushihara Y, Endo S, Suzuki M, Shinoda H, Fukumoto M. External exposure dose estimation by electron spin resonance technique for wild Japanese macaque captured in Fukushima Prefecture. RADIAT MEAS 2020. [DOI: 10.1016/j.radmeas.2020.106315] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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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8
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Higuchi K, Chiba M, Sai Y, Yamaguchi Y, Nogami S, Yamauchi K, Takahashi T. Relationship between temporomandibular joint pain and magnetic resonance imaging findings in patients with temporomandibular joint disorders. Int J Oral Maxillofac Surg 2020; 49:230-236. [DOI: 10.1016/j.ijom.2019.06.028] [Citation(s) in RCA: 5] [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] [Received: 01/21/2019] [Revised: 04/23/2019] [Accepted: 06/25/2019] [Indexed: 10/26/2022]
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9
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Abstract
Abstract
TCA residues in wheat grain may be determined directly without extraction or cleanup. The chloroform formed by decomposition of TCA is collected in xylene and determined by microcoulometric gas chromatography. Two varieties of wheat grown in two different soil types and treated with TCA applied at the 1–4 lb per acre level were analyzed by this direct technique. By using the direct procedure as an arbitrary standard for 100% recovery, comparisons were made among three extraction techniques. Extraction of spiked wheat samples gave recoveries comparable to the direct method. Field-treated samples, however, gave poor recoveries. The results indicated that TCA is not readily extracted from fieldtreated samples, possibly because of combination with basic cell constituents.
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Affiliation(s)
- M Chiba
- Analytical Chemistry Research Service, Research Branch, Canada Department of Agriculture, Ottawa, Ontario, Canada
| | - H V Morley
- Analytical Chemistry Research Service, Research Branch, Canada Department of Agriculture, Ottawa, Ontario, Canada
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10
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Fukuda S, Suda K, Ohara S, Nishino M, Chiba M, Takemoto T, Soh J, Mitsudomi T. P2.17-41 Treatment Outcomes of Pulmonary Resection in NSCLC Patients with Autoimmune Diseases. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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11
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Fujino T, Kobayashi Y, Suda K, Koga T, Nishino M, Ohara S, Chiba M, Hamada A, Takemoto T, Soh J, Misudomi T. MA09.10 Comprehensive Analysis of Secondary Mutation as Resistance Mechanism to Seven MET-TKIs for MET Exon 14 Skipping in Vitro. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Adeva B, Afanasyev L, Anania A, Aogaki S, Benelli A, Brekhovskikh V, Cechak T, Chiba M, Chliapnikov PV, Doskarova P, Drijard D, Dudarev A, Dumitriu D, Fluerasu D, Gorin A, Gorchakov O, Gritsay K, Guaraldo C, Gugiu M, Hansroul M, Hons Z, Horikawa S, Iwashita Y, Karpukhin V, Kluson J, Kobayashi M, Kruglov V, Kruglova L, Kulikov A, Kulish E, Lamberto A, Lanaro A, Lednicky R, Mariñas C, Martincik J, Nemenov L, Nikitin M, Okada K, Olchevskii V, Ovsiannikov V, Pentia M, Penzo A, Plo M, Prusa P, Rappazzo GF, Romero Vidal A, Ryazantsev A, Rykalin V, Saborido J, Schacher J, Sidorov A, Smolik J, Takeutchi F, Trojek T, Trusov S, Urban T, Vrba T, Yazkov V, Yoshimura Y, Zrelov P. First Measurement of a Long-Lived π^{+}π^{-} Atom Lifetime. Phys Rev Lett 2019; 122:082003. [PMID: 30932583 DOI: 10.1103/physrevlett.122.082003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Indexed: 06/09/2023]
Abstract
The adapted DIRAC experiment at the CERN PS accelerator observed for the first time long-lived hydrogenlike π^{+}π^{-} atoms, produced by protons hitting a beryllium target. A part of these atoms crossed the gap of 96 mm between the target and a 2.1 μm thick platinum foil, in which most of them dissociated. Analyzing the observed number of atomic pairs, n_{A}^{L}=436_{-61}^{+157}|_{tot}, the lifetime of the 2p state is found to be τ_{2p}=(0.45_{-0.30}^{+1.08}|_{tot})×10^{-11} s, not contradicting the corresponding QED 2p state lifetime τ_{2p}^{QED}=1.17×10^{-11} s. This lifetime value is three orders of magnitude larger than our previously measured value of the π^{+}π^{-} atom ground state lifetime τ=(3.15_{-0.26}^{+0.28}|_{tot})×10^{-15} s. Further studies of long-lived π^{+}π^{-} atoms will allow us to measure energy differences between p and s atomic states and so to discriminate between the isoscalar and isotensor ππ scattering lengths with the aim to check QCD predictions.
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Affiliation(s)
- B Adeva
- Santiago de Compostela University, Santiago de Compostela, Spain
| | | | - A Anania
- INFN, Sezione di Trieste and Messina University, Messina, Italy
| | - S Aogaki
- IFIN-HH, National Institute for Physics and Nuclear Engineering, Bucharest, Romania
| | - A Benelli
- Czech Technical University in Prague, Prague, Czech Republic
| | | | - T Cechak
- Czech Technical University in Prague, Prague, Czech Republic
| | - M Chiba
- Tokyo Metropolitan University, Tokyo, Japan
| | | | - P Doskarova
- Czech Technical University in Prague, Prague, Czech Republic
| | | | | | - D Dumitriu
- IFIN-HH, National Institute for Physics and Nuclear Engineering, Bucharest, Romania
| | - D Fluerasu
- IFIN-HH, National Institute for Physics and Nuclear Engineering, Bucharest, Romania
| | | | | | | | - C Guaraldo
- INFN, Laboratori Nazionali di Frascati, Frascati, Italy
| | - M Gugiu
- IFIN-HH, National Institute for Physics and Nuclear Engineering, Bucharest, Romania
| | | | - Z Hons
- Nuclear Physics Institute ASCR, Rez, Czech Republic
| | | | | | | | - J Kluson
- Czech Technical University in Prague, Prague, Czech Republic
| | | | | | | | | | | | - A Lamberto
- INFN, Sezione di Trieste and Messina University, Messina, Italy
| | - A Lanaro
- CERN, Geneva, Switzerland
- University of Wisconsin, Madison, Wisconsin USA
| | - R Lednicky
- Institute of Physics ASCR, Prague, Czech Republic
| | - C Mariñas
- Santiago de Compostela University, Santiago de Compostela, Spain
| | - J Martincik
- Czech Technical University in Prague, Prague, Czech Republic
| | - L Nemenov
- JINR, Dubna, Russia
- CERN, Geneva, Switzerland
| | | | - K Okada
- Kyoto Sangyo University, Kyoto, Japan
| | | | | | - M Pentia
- IFIN-HH, National Institute for Physics and Nuclear Engineering, Bucharest, Romania
| | - A Penzo
- INFN, Sezione di Trieste, Trieste, Italy
| | - M Plo
- Santiago de Compostela University, Santiago de Compostela, Spain
| | - P Prusa
- Czech Technical University in Prague, Prague, Czech Republic
| | - G F Rappazzo
- INFN, Sezione di Trieste and Messina University, Messina, Italy
| | - A Romero Vidal
- Santiago de Compostela University, Santiago de Compostela, Spain
| | | | | | - J Saborido
- Santiago de Compostela University, Santiago de Compostela, Spain
| | - J Schacher
- Albert Einstein Center for Fundamental Physics, LHEP, Bern, Switzerland
| | | | - J Smolik
- Czech Technical University in Prague, Prague, Czech Republic
| | | | - T Trojek
- Czech Technical University in Prague, Prague, Czech Republic
| | - S Trusov
- Skobeltsin Institute for Nuclear Physics of Moscow State University, Moscow, Russia
| | - T Urban
- Czech Technical University in Prague, Prague, Czech Republic
| | - T Vrba
- Czech Technical University in Prague, Prague, Czech Republic
| | - V Yazkov
- Skobeltsin Institute for Nuclear Physics of Moscow State University, Moscow, Russia
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13
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Fujino T, Suda K, Kobayashi Y, Nishino M, Koga T, Ohara S, Chiba M, Shimoji M, Takemoto T, Mitsudomi T. P1.13-41 In Vitro Evaluation for Optimal MET-TKI Selection in Lung Cancers with MET Mutations Including Exon 14 Skipping. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Chiba M. Nutritional status and gastrointestinal symptoms in pediatric abdominal pain-related gastrointestinal dysfunction. Clin Nutr 2018. [DOI: 10.1016/j.clnu.2018.06.1957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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15
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Nogami S, Takahashi T, Yamauchi K, Takeda Y, Ito K, Chiba M, Gaggl A. Relationship between arthroscopic findings of synovitis and levels of tumour necrosis factor-alpha and matrix metalloproteinases in synovial lavage fluid from patients with unilateral high mandibular condyle fractures. J Oral Rehabil 2018; 45:452-458. [PMID: 29663487 DOI: 10.1111/joor.12632] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/03/2018] [Indexed: 01/15/2023]
Abstract
Arthrocentesis has an effect of washing out inflammatory products that accumulate in the joint compartment of a dysfunctional temporomandibular joint (TMJ). The procedure removes inflammatory cytokines, which are pain-causing substances, for early reduction of TMJ pain and quick recovery of jaw function, thus increasing the possibility of a successful rehabilitation. The aim of this study was to investigate the relationship between arthroscopy synovitis grade in patients with unilateral high condylar fractures and concentrations of the pro-inflammatory cytokines tumour necrosis factor (TNF)-alpha as well as of matrix metalloproteinases (MMPs) in washed-out synovial fluid (SF) samples obtained from those patients. A total of 26 patients with unilateral high condylar fractures who underwent arthrocentesis for a therapeutic purpose were examined. SF samples were collected before performing arthroscopy to determine synovitis grade. The detection rates and concentrations of TNF-alpha and MMPs were determined, and their association with synovitis grade was analysed. TNF-alpha was detected in 23 and MMP-3 in 22 of the TMJs. There was a correlation between synovitis grade and concentration of TNF-alpha in the fracture group. Furthermore, the concentrations of TNF-alpha and MMP-3 were significantly higher as compared to the control group, comprised of TMJs on the non-fracture side of the same patients, while a correlation was also noted between TNF-alpha concentration and synovitis grade in the fracture group. The present findings may provide a biological/biochemical rationale for arthrocentesis as a reasonable treatment modality for high condylar fractures.
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Affiliation(s)
- S Nogami
- Division of Oral and Maxillofacial Surgery, Department of Oral Medicine, and Surgery, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan.,Department of Oral and Maxillofacial Surgery, Salzburg Paracelsus Medical University, Salzburg, Austria
| | - T Takahashi
- Division of Oral and Maxillofacial Surgery, Department of Oral Medicine, and Surgery, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan
| | - K Yamauchi
- Division of Oral and Maxillofacial Surgery, Department of Oral Medicine, and Surgery, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan
| | - Y Takeda
- Division of Oral and Maxillofacial Surgery, Department of Oral Medicine, and Surgery, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan
| | - K Ito
- Department of Maxillofacial Surgery, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba, Japan
| | - M Chiba
- Division of Oral and Maxillofacial Surgery, Department of Oral Medicine, and Surgery, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan
| | - A Gaggl
- Department of Oral and Maxillofacial Surgery, Salzburg Paracelsus Medical University, Salzburg, Austria
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16
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Koarai K, Kino Y, Takahashi A, Suzuki T, Shimizu Y, Chiba M, Osaka K, Sasaki K, Urushihara Y, Fukuda T, Isogai E, Yamashiro H, Oka T, Sekine T, Fukumoto M, Shinoda H. 90Sr specific activity of teeth of abandoned cattle after the Fukushima accident - teeth as an indicator of environmental pollution. J Environ Radioact 2018; 183:1-6. [PMID: 29274551 DOI: 10.1016/j.jenvrad.2017.12.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 12/12/2017] [Accepted: 12/12/2017] [Indexed: 05/27/2023]
Abstract
90Sr specific activity in the teeth of young cattle that were abandoned in Kawauchi village and Okuma town located in the former evacuation areas of the Fukushima-Daiichi Nuclear Power Plant (FNPP) accident were measured. Additionally, specific activity in contaminated surface soils sampled from the same area was measured. (1) All cattle teeth examined were contaminated with 90Sr. The specific activity, however, varied depending on the developmental stage of the teeth during the FNPP accident; teeth that had started development before the accident exhibited comparatively lower values, while teeth developed mainly after the accident showed higher values. (2) Values of 90Sr-specific activity in teeth formed after the FNPP accident were higher than those of the bulk soil but similar to those in the exchangeable fraction (water and CH3COONH4 soluble fractions) of the soil. The findings suggest that 90Sr was incorporated into the teeth during the process of development, and that 90Sr in the soluble and/or leachable fractions of the soil might migrate into teeth and contribute to the amount of 90Sr in the teeth. Thus, the concentration of 90Sr in teeth formed after the FNPP accident might reflect the extent of 90Sr pollution in the environment.
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Affiliation(s)
| | - Yasushi Kino
- Department of Chemistry, Tohoku University, Japan
| | | | - Toshihiko Suzuki
- Graduate School of Dentistry, Tohoku University, Japan; International Research Institute of Disaster Science, Tohoku University, Japan
| | | | - Mirei Chiba
- Graduate School of Dentistry, Tohoku University, Japan
| | - Ken Osaka
- Graduate School of Dentistry, Tohoku University, Japan; International Research Institute of Disaster Science, Tohoku University, Japan
| | | | | | | | - Emiko Isogai
- Graduate School of Agricultural Science, Tohoku University, Japan
| | | | - Toshitaka Oka
- Department of Chemistry, Tohoku University, Japan; Institute for Excellence in Higher Education, Tohoku University, Japan
| | - Tsutomu Sekine
- Department of Chemistry, Tohoku University, Japan; Institute for Excellence in Higher Education, Tohoku University, Japan.
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17
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Kobayashi Y, Fujino T, Nishino M, Ohara S, Sesumi Y, Chiba M, Shimoji M, Tomizawa K, Takemoto T, Mitsudomi T. P3.02-059 T790M and C797S as Mechanisms of Acquired Resistance to Dacomitinib in Cell Models. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Ohara S, Kobayashi Y, Fujino T, Sesumi Y, Nishino M, Chiba M, Shimoji M, Tomizawa K, Takemoto T, Mitsudomi T. P3.16-049 Surgery with Continued TKI Therapy After Acquiring Resistance to EGFR or ALK TKI. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Adeva B, Afanasyev L, Allkofer Y, Amsler C, Anania A, Aogaki S, Benelli A, Brekhovskikh V, Cechak T, Chiba M, Chliapnikov P, Drijard D, Dudarev A, Dumitriu D, Federicova P, Fluerasu D, Gorin A, Gorchakov O, Gritsay K, Guaraldo C, Gugiu M, Hansroul M, Hons Z, Horikawa S, Iwashita Y, Karpukhin V, Kluson J, Kobayashi M, Kruglov V, Kruglova L, Kulikov A, Kulish E, Kuptsov A, Lamberto A, Lanaro A, Lednicky R, Mariñas C, Martincik J, Nemenov L, Nikitin M, Okada K, Olchevskii V, Pentia M, Penzo A, Plo M, Prusa P, Rappazzo G, Romero Vidal A, Ryazantsev A, Rykalin V, Saborido J, Schacher J, Sidorov A, Smolik J, Takeutchi F, Tauscher L, Trojek T, Trusov S, Urban T, Vrba T, Yazkov V, Yoshimura Y, Zhabitsky M, Zrelov P. Measurement of the
πK
atom lifetime and the
πK
scattering length. Int J Clin Exp Med 2017. [DOI: 10.1103/physrevd.96.052002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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20
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Chiba M, Toki A. MON-P266: Serum IGF-1 Level and Nutritional Assessment in Children with Short Bowel Syndrome. Clin Nutr 2017. [DOI: 10.1016/s0261-5614(17)30823-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Maruyama M, Higashiguchi T, Ishibashi I, Suzuki Y, Iijima S, Inukai M, Iishi T, Kawasaki N, Kurata N, Chiba M, Teramoto F, Nakamura E, Kayashita J, Tabei I. MON-P241: Feasibility of International Proposed Standardized Enteral Connector for Semi-Solid Formula Feeding. Clin Nutr 2017. [DOI: 10.1016/s0261-5614(17)30848-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Abstract
Periodontal remodeling during orthodontic tooth movement is a result of mechanical stresses. The application of excessive orthodontic force induces cell death. However, the nature of compressive force-induced cell death is unclear. We examined whether the in vitro application of continuous compressive force would induce apoptosis in human osteoblast-like cells (MG-63 cells), and investigated the mechanism by which apoptosis was initiated. The cells became aligned irregularly, and cell viability decreased, indicating that the compressive force caused cell death. According to the TUNEL analysis, the number of apoptotic cells increased significantly in a time-and force-dependent manner. Caspase-3 activity increased with the magnitude of the compressive force, and this effect was reduced significantly by a caspase-8 inhibitor, whereas a caspase-9 inhibitor had no such effect. We conclude that the in vitro application of compressive force can induce apoptosis in MG-63 cells through the activation of caspase-3 via the caspase-8 signaling cascade.
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Affiliation(s)
- Y Goga
- Division of Orthodontics and Dentofacial Orthopedics, Department of Oral Health and Development Sciences, School of Dentistry, Tohoku University, 4-1 Seiryo-cho, Aoba-ku, Sendai 980-8575, Japan.
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23
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Tsuchiya S, Chiba M, Kishimoto KN, Nakamura H, Tsuchiya M, Hayashi H. Transfer of the bone morphogenetic protein 4 gene into rat periodontal ligament by in vivo electroporation. Arch Oral Biol 2016; 74:123-132. [PMID: 27940045 DOI: 10.1016/j.archoralbio.2016.11.013] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 10/07/2016] [Accepted: 11/22/2016] [Indexed: 12/22/2022]
Abstract
OBJECTIVE Regulation of alveolar bone metabolism is required in clinical dentistry. The aim of the present study was to establish a method for gene transfer into the periodontal ligament (PDL) by in vivo electroporation with a plasmid vector and to investigate the effects of BMP-4 transfer into the PDL. DESIGN Plasmids containing mouse BMP-4 cDNA (pCAGGS-BMP4) were transfected into cultured rat PDL cells by in vitro electroporation, and BMP-4 production and secretion were detected by immunocytochemistry and western blotting. Next, pCAGGS-BMP4 was injected into the PDL of rats, and electroporation was performed in vivo, using original paired-needle electrodes. BMP-4 expression was examined by immunohistochemical staining 3, 7, 14, 21, and 28days after electroporation. Control groups were injected with pCAGGS by electroporation, injected with pCAGGS-BMP4 without electroporation, or subjected to neither injection nor electroporation. RESULTS In vitro-transfected rat PDL cells exhibited production and secretion of the mature-form BMP-4. After in vivo electroporation of pCAGGS-BMP4, site-specific BMP-4 expression peaked on day 3, gradually decreased until day 14, and was absent by day 21. We observed no unfavorable effects such as inflammation, degeneration, or necrosis. CONCLUSIONS Gene transfer by electroporation with plasmid DNA vectors has several advantages over other methods, including the non-viral vector, non-immunogenic effects, site-specific expression, simplicity, cost-effectiveness, and limited histological side effects. Our results indicate that the method is useful for gene therapy targeting the periodontal tissue, which regulates alveolar bone remodeling.
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Affiliation(s)
- Shinobu Tsuchiya
- Division of Oral Dysfunction Science, Department of Oral Health and Development Sciences, Tohoku University Graduate School of Dentistry, Miyagi, 980-8575, Japan.
| | - Mirei Chiba
- Division of Oral Physiology, Department of Oral Function and Morphology, Tohoku University Graduate School of Dentistry, Miyagi, 980-8575, Japan.
| | - Koshi N Kishimoto
- Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Miyagi, 980-8575, Japan.
| | - Harukazu Nakamura
- Department of Molecular Neurobiology, Tohoku University Graduate School of Life Sciences and Institute of Development, Aging and Cancer, Miyagi, 980-8575, Japan.
| | - Masahiro Tsuchiya
- Faculty of Health Science, Department of Nursing, Tohoku Fukushi University, Miyagi, 981-8522, Japan; Division of Oral Diagnosis, Tohoku University Graduate School of Dentistry, Miyagi, 980-8575, Japan.
| | - Haruhide Hayashi
- Division of Oral Physiology, Department of Oral Function and Morphology, Tohoku University Graduate School of Dentistry, Miyagi, 980-8575, Japan.
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24
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Izumi S, Hong G, Iwasaki K, Izumi M, Matsuyama Y, Chiba M, Toda T, Kudo TA. Gustatory Salivation Is Associated with Body Mass Index, Daytime Sleepiness, and Snoring in Healthy Young Adults. TOHOKU J EXP MED 2016; 240:153-165. [PMID: 27760896 DOI: 10.1620/tjem.240.153] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The taste detection system for oral fatty acid may be related to obesity. In addition, sleep is intrinsically and closely related to food intake and metabolism. However, the association of gustatory salivation with body mass index (BMI), daytime sleepiness, or sleep habits is largely unknown. Therefore, we evaluated the relationship between gustatory salivation and BMI, Epworth sleepiness scale (ESS, a daytime sleepiness scale) or sleep habits among 26 healthy young individuals (20 males and 6 females; mean age: 26.0 ± 4.3 years). We also measured the saliva flow rate (SFR) that was induced by gum-chewing or each of three prototypical tastants (acetic acid, sucrose, and NaCl). Further, the SFR was induced by fatty acid, provided as oleic acid (OA) homogenized in non-fat milk. All participants showed normal rates of salivation during resting and gum-chewing states. The increase in the SFR induced by OA, but not by each of the three tastants, was associated with BMI. Moreover, both daytime sleepiness level and frequency of snoring were associated with the increase in the SFR induced by NaCl. These results suggest that BMI is associated with salivation induced by oral fatty acid exposure. Additionally, the regulatory mechanism for the NaCl-induced salivation reflex may have a relationship with impairments of the respiratory control system that are related to snoring during sleep and lead to daytime sleepiness because of insufficient sleep. Thus, measurement of gustatory salivation might contribute to the evaluation and prevention of obesity and sleep-related breathing disorders.
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Affiliation(s)
- Satoshi Izumi
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry
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25
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Takeda K, Matsushita H, Ogawa T, Kubozono M, Ishikawa Y, Yamamoto T, Kozumi M, Takahashi N, Dobashi S, Kadoya N, Ito K, Chiba M, Komori S, Ishizawa Y, Takeda K, Tasaka S, Katagiri Y, Tanabe T, Katori Y, Jingu K. Association of Pretreatment Serum Albumin with Reduction in Oropharyngeal Squamous Cell Carcinoma Tumor Volume During Curative External Beam Radiation Therapy. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1537] [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: 11/17/2022]
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26
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Adeva B, Afanasyev L, Allkofer Y, Amsler C, Anania A, Aogaki S, Benelli A, Brekhovskikh V, Cechak T, Chiba M, Chliapnikov P, Doskarova P, Drijard D, Dudarev A, Dumitriu D, Fluerasu D, Gorin A, Gorchakov O, Gritsay K, Guaraldo C, Gugiu M, Hansroul M, Hons Z, Horikawa S, Iwashita Y, Karpukhin V, Kluson J, Kobayashi M, Kruglov V, Kruglova L, Kulikov A, Kulish E, Kuptsov A, Lamberto A, Lanaro A, Lednicky R, Mariñas C, Martincik J, Nemenov L, Nikitin M, Okada K, Olchevskii V, Pentia M, Penzo A, Plo M, Prusa P, Rappazzo G, Romero Vidal A, Ryazantsev A, Rykalin V, Saborido J, Schacher J, Sidorov A, Smolik J, Takeutchi F, Tauscher L, Trojek T, Trusov S, Urban T, Vrba T, Yazkov V, Yoshimura Y, Zhabitsky M, Zrelov P. Observation of π^{-}K^{+} and π^{+}K^{-} Atoms. Phys Rev Lett 2016; 117:112001. [PMID: 27661682 DOI: 10.1103/physrevlett.117.112001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Indexed: 06/06/2023]
Abstract
The observation of hydrogenlike πK atoms, consisting of π^{-}K^{+} or π^{+}K^{-} mesons, is presented. The atoms are produced by 24 GeV/c protons from the CERN PS accelerator, interacting with platinum or nickel foil targets. The breakup (ionization) of πK atoms in the same targets yields characteristic πK pairs, called "atomic pairs," with small relative momenta Q in the pair center-of-mass system. The upgraded DIRAC experiment observed 349±62 such atomic πK pairs, corresponding to a signal of 5.6 standard deviations. This is the first statistically significant observation of the strange dimesonic πK atom.
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Affiliation(s)
- B Adeva
- Santiago de Compostela University, Santiago de Compostela, Spain
| | | | | | - C Amsler
- Albert Einstein Center for Fundamental Physics, Laboratory of High Energy Physics, Bern, Switzerland
| | - A Anania
- INFN, Sezione di Trieste and Messina University, Messina, Italy
| | - S Aogaki
- IFIN-HH, National Institute for Physics and Nuclear Engineering, Bucharest, Romania
| | - A Benelli
- Czech Technical University in Prague, Prague, Czech Republic
| | | | - T Cechak
- Czech Technical University in Prague, Prague, Czech Republic
| | - M Chiba
- Tokyo Metropolitan University, Tokyo, Japan
| | | | - P Doskarova
- Czech Technical University in Prague, Prague, Czech Republic
| | | | | | - D Dumitriu
- IFIN-HH, National Institute for Physics and Nuclear Engineering, Bucharest, Romania
| | - D Fluerasu
- IFIN-HH, National Institute for Physics and Nuclear Engineering, Bucharest, Romania
| | | | | | | | - C Guaraldo
- INFN, Laboratori Nazionali di Frascati, Frascati, Italy
| | - M Gugiu
- IFIN-HH, National Institute for Physics and Nuclear Engineering, Bucharest, Romania
| | | | - Z Hons
- Nuclear Physics Institute ASCR, Rez, Czech Republic
| | | | | | | | - J Kluson
- Czech Technical University in Prague, Prague, Czech Republic
| | | | | | | | | | | | | | - A Lamberto
- INFN, Sezione di Trieste and Messina University, Messina, Italy
| | - A Lanaro
- University of Wisconsin, Madison, USA
| | - R Lednicky
- Institute of Physics ASCR, Prague, Czech Republic
| | - C Mariñas
- Santiago de Compostela University, Santiago de Compostela, Spain
| | - J Martincik
- Czech Technical University in Prague, Prague, Czech Republic
| | - L Nemenov
- JINR, Dubna, Russia
- CERN, Geneva, Switzerland
| | | | - K Okada
- Kyoto Sangyo University, Kyoto, Japan
| | | | - M Pentia
- IFIN-HH, National Institute for Physics and Nuclear Engineering, Bucharest, Romania
| | - A Penzo
- INFN, Sezione di Trieste, Trieste, Italy
| | - M Plo
- Santiago de Compostela University, Santiago de Compostela, Spain
| | - P Prusa
- Czech Technical University in Prague, Prague, Czech Republic
| | - G Rappazzo
- INFN, Sezione di Trieste and Messina University, Messina, Italy
| | | | | | | | - J Saborido
- Santiago de Compostela University, Santiago de Compostela, Spain
| | - J Schacher
- Albert Einstein Center for Fundamental Physics, Laboratory of High Energy Physics, Bern, Switzerland
| | | | - J Smolik
- Czech Technical University in Prague, Prague, Czech Republic
| | | | | | - T Trojek
- Czech Technical University in Prague, Prague, Czech Republic
| | - S Trusov
- Skobeltsin Institute for Nuclear Physics of Moscow State University, Moscow, Russia
| | - T Urban
- Czech Technical University in Prague, Prague, Czech Republic
| | - T Vrba
- Czech Technical University in Prague, Prague, Czech Republic
| | - V Yazkov
- Skobeltsin Institute for Nuclear Physics of Moscow State University, Moscow, Russia
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27
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Takizawa A, Chiba M, Ota T, Yasuda M, Suzuki K, Kanemitsu T, Itoh T, Shinoda H, Igarashi K. The novel bisphosphonate disodium dihydrogen-4-[(methylthio) phenylthio] methanebisphosphonate increases bone mass in post-ovariectomy rats. J Pharmacol Sci 2016; 131:37-50. [PMID: 27245552 DOI: 10.1016/j.jphs.2016.04.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 03/28/2016] [Accepted: 04/01/2016] [Indexed: 01/01/2023] Open
Abstract
The novel bisphosphonate (BP) disodium dihydrogen-4-[(methylthio) phenylthio] methanebisphosphonate (MPMBP) is a non-nitrogen-containing BP with an antioxidant side chain that possesses anti-inflammatory properties. We investigated the systemic effects of this compound on bone loss induced by ovariectomy (OVX) in adult rats. Micro-computed tomography revealed that MPMBP increased bone mass and density in both the metaphysis and diaphysis, and improved the structural properties important for mechanical strength of osteoporotic bone. Sequential bone labeling with tetracycline and calcein indicated that MPMBP decreased longitudinal growth of the primary spongiosa (PS), but stimulated cortical bone formation in the diaphysis. MPMBP increased type I collagen accumulation in the PS, and decreased the number and size of adipocytes in the bone marrow, suggesting inhibition of increased bone marrow adipogenesis induced by OVX. Furthermore, MPMBP reduced the number of bone resorbing cathepsin K-positive osteoclasts induced by OVX. These results suggest that MPMBP could improve bone loss induced by estrogen deficiency. Both stimulation of bone formation and inhibition of bone resorption might play a role in the increase in bone mass and bone density after MPMBP treatment.
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Affiliation(s)
- Aiko Takizawa
- Division of Oral Dysfunction Science, Department of Oral Health and Development Science, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; Division of Oral Physiology, Department of Oral Function and Morphology, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Mirei Chiba
- Division of Oral Physiology, Department of Oral Function and Morphology, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan.
| | - Takeru Ota
- Division of Oral Physiology, Department of Oral Function and Morphology, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Mayumi Yasuda
- Division of Oral Dysfunction Science, Department of Oral Health and Development Science, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; Division of Oral Physiology, Department of Oral Function and Morphology, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Keiko Suzuki
- Department of Pharmacology, School of Dentistry, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Takuya Kanemitsu
- Division of Organic and Bioorganic Chemistry, Department of Medicinal Chemistry, School of Pharmacy, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Takashi Itoh
- Division of Organic and Bioorganic Chemistry, Department of Medicinal Chemistry, School of Pharmacy, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Hisashi Shinoda
- Center for Environmental Dentistry, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Kaoru Igarashi
- Division of Oral Dysfunction Science, Department of Oral Health and Development Science, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
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28
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Ito K, Kadoya N, Chiba M, Sato K, Nagasaka T, Yamanaka K, Dobashi S, Takeda K, Matsushita H, Jingu K. SU-F-I-24: Feasibility of Magnetic Susceptibility to Relative Electron Density Conversion Method for Radiation Therapy. Med Phys 2016. [DOI: 10.1118/1.4955852] [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: 11/07/2022] Open
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29
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Miyasaka Y, Kadoya N, Kuroda Y, Ito K, Chiba M, Nakajima Y, Sato K, Dobashi S, Takeda K, Jingu K. TU-AB-202-02: Deformable Image Registration Accuracy Between External Beam Radiotherapy and HDR Brachytherapy CT Images for Cervical Cancer Using a 3D-Printed Deformable Pelvis Phantom. Med Phys 2016. [DOI: 10.1118/1.4957424] [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: 11/07/2022] Open
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30
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Koarai K, Kino Y, Takahashi A, Suzuki T, Shimizu Y, Chiba M, Osaka K, Sasaki K, Fukuda T, Isogai E, Yamashiro H, Oka T, Sekine T, Fukumoto M, Shinoda H. (90)Sr in teeth of cattle abandoned in evacuation zone: Record of pollution from the Fukushima-Daiichi Nuclear Power Plant accident. Sci Rep 2016; 6:24077. [PMID: 27045764 PMCID: PMC4820720 DOI: 10.1038/srep24077] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 03/15/2016] [Indexed: 11/23/2022] Open
Abstract
Here we determined the 90Sr concentrations in the teeth of cattle abandoned in the evacuation area of the Fukushima-Daiichi Nuclear Power Plant (FNPP) accident. 90Sr activity concentrations in the teeth varied from 6–831 mBq (g Ca)−1 and exhibited a positive relationship with the degree of radioactive contamination that the cattle experienced. Even within an individual animal, the specific activity of 90Sr (Bq (g Sr)−1) varied depending on the development stage of the teeth during the FNPP accident: teeth that were early in development exhibited high 90Sr specific activities, while teeth that were late in development exhibited low specific activities. These findings demonstrate that 90Sr is incorporated into the teeth during tooth development; thus, tooth 90Sr activity concentrations reflect environmental 90Sr levels during tooth formation. Assessment of 90Sr in teeth could provide useful information about internal exposure to 90Sr radiation and allow for the measurement of time-course changes in the degree of environmental 90Sr pollution.
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Affiliation(s)
| | - Yasushi Kino
- Department of Chemistry, Tohoku University, Japan
| | | | - Toshihiko Suzuki
- Graduate School of Dentistry, Tohoku University, Japan.,International Research Institute of Disaster Science, Tohoku University, Japan
| | | | - Mirei Chiba
- Graduate School of Dentistry, Tohoku University, Japan
| | - Ken Osaka
- Graduate School of Dentistry, Tohoku University, Japan.,International Research Institute of Disaster Science, Tohoku University, Japan
| | | | - Tomokazu Fukuda
- Graduate School of Agricultural Science, Tohoku University, Japan
| | - Emiko Isogai
- Graduate School of Agricultural Science, Tohoku University, Japan
| | | | - Toshitaka Oka
- Department of Chemistry, Tohoku University, Japan.,Institute for Excellence in Higher Education, Tohoku University, Japan
| | - Tsutomu Sekine
- Department of Chemistry, Tohoku University, Japan.,Institute for Excellence in Higher Education, Tohoku University, Japan
| | - Manabu Fukumoto
- Institute of Development, Aging and Cancer, Tohoku University, Japan
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31
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Takeda K, Matsushita H, Ogawa T, Dobashi S, Ishizawa Y, Chida K, Kadoya N, Ito K, Chiba M, Kubozono M, Umezawa R, Shirata Y, Ishikawa Y, Yamamoto T, Kozumi M, Tanabe T, Takahashi N, Katagiri Y, Tazaka S, Takeda K, Sato K, Katori Y, Jingu K. EP-1043: Clinical and volumetric prognostic factors in external beam radiotherapy for head and neck cancer. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32293-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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32
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Monzen S, Mariya Y, Nakamura A, Kawamura C, Taira K, Chiba M, Takai Y. Cytogenetic dosimetry by micronucleus assay using peripheral blood cells is modified by thyroid hormones. Radiat Prot Dosimetry 2015; 167:321-325. [PMID: 25948836 DOI: 10.1093/rpd/ncv271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Cytokinesis-block micronucleus (CBMN) assay is a convenient and easy method of radiation biodosimetry that uses peripheral blood (PB) cells. However, for micronuclei (MN) frequency induced by ionising radiation, a dose-response relationship in abnormal condition, such as in cancer patients, has not been assessed. To clarify the difference between the dose-response curve generated by the CBMN assay in conditions when thyroid hormone levels were normal and during thyroid hormone withdrawal (THW) prior to (131)I treatment, 12 thyroid cancer patients who underwent thyroidectomy were studied. The collected PB mononuclear cells were exposed to 0.5-3.0 Gy X-ray irradiation. Under normal conditions, dose dependency and independency of MN frequency were observed in 92 % and 8 %, respectively. In contrast, during THW, the number of patients who showed dose independency significantly increased to 42 % in comparison with control. Furthermore, a higher concentration of serum thyroglobulin in dose-independent patients was observed. These results suggest that MN frequency in cytogenetic dosimetry is affected by thyroid hormones.
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Affiliation(s)
- S Monzen
- Department of Radiological Life Sciences, Division of Medical Life Sciences, Hirosaki University Graduate School of Health Sciences, 66-1 Hon-cho, Hirosaki, Aomori, Japan
| | - Y Mariya
- Department of Radiological Life Sciences, Division of Medical Life Sciences, Hirosaki University Graduate School of Health Sciences, 66-1 Hon-cho, Hirosaki, Aomori, Japan
| | - A Nakamura
- Department of Radiological Life Sciences, Division of Medical Life Sciences, Hirosaki University Graduate School of Health Sciences, 66-1 Hon-cho, Hirosaki, Aomori, Japan
| | - C Kawamura
- Department of Radiological Life Sciences, Division of Medical Life Sciences, Hirosaki University Graduate School of Health Sciences, 66-1 Hon-cho, Hirosaki, Aomori, Japan
| | - K Taira
- Department of Radiological Life Sciences, Division of Medical Life Sciences, Hirosaki University Graduate School of Health Sciences, 66-1 Hon-cho, Hirosaki, Aomori, Japan
| | - M Chiba
- Department of Radiological Life Sciences, Division of Medical Life Sciences, Hirosaki University Graduate School of Health Sciences, 66-1 Hon-cho, Hirosaki, Aomori, Japan
| | - Y Takai
- Department of Radiology and Radiation Oncology, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, Japan
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Fukuda T, Hiji M, Kino Y, Abe Y, Yamashiro H, Kobayashi J, Shimizu Y, Takahashi A, Suzuki T, Chiba M, Inoue K, Kuwahara Y, Morimoto M, Katayama M, Donai K, Shinoda H, Sekine T, Fukumoto M, Isogai E. Software development for estimating the concentration of radioactive cesium in the skeletal muscles of cattle from blood samples. Anim Sci J 2015; 87:842-7. [DOI: 10.1111/asj.12490] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 04/29/2015] [Accepted: 05/17/2015] [Indexed: 11/30/2022]
Affiliation(s)
- Tomokazu Fukuda
- Graduate School of Agricultural Sciences; Tohoku University; Sendai Japan
- Tohoku Agricultural Science Center for Reconstruction; Graduate School of Agricultural Sciences, Tohoku University; Sendai Japan
| | | | - Yasushi Kino
- Department of Chemistry; Tohoku University; Sendai Japan
| | - Yasuyuki Abe
- National Research Center for Protozoa Diseases; Obihiro University of Agriculture and Veterinary Medicine; Obihiro Japan
| | | | - Jin Kobayashi
- Miyagi University, School of Food; Agricultural and Environmental Sciences; Miyagi Japan
| | | | | | | | - Mirei Chiba
- Graduate School of Dentistry; Tohoku University; Sendai Japan
| | - Kazuya Inoue
- Department of Pathology; Institute of Development, Aging and Cancer, Tohoku University; Sendai Japan
| | - Yoshikazu Kuwahara
- Department of Pathology; Institute of Development, Aging and Cancer, Tohoku University; Sendai Japan
| | - Motoko Morimoto
- Miyagi University, School of Food; Agricultural and Environmental Sciences; Miyagi Japan
| | - Masafumi Katayama
- Graduate School of Agricultural Sciences; Tohoku University; Sendai Japan
| | - Kenichiro Donai
- Graduate School of Agricultural Sciences; Tohoku University; Sendai Japan
| | - Hisashi Shinoda
- Graduate School of Dentistry; Tohoku University; Sendai Japan
| | - Tsutomu Sekine
- Center for the Advancement of Higher Education; Tohoku University; Sendai Japan
| | - Manabu Fukumoto
- Department of Pathology; Institute of Development, Aging and Cancer, Tohoku University; Sendai Japan
| | - Emiko Isogai
- Graduate School of Agricultural Sciences; Tohoku University; Sendai Japan
- Tohoku Agricultural Science Center for Reconstruction; Graduate School of Agricultural Sciences, Tohoku University; Sendai Japan
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Hashidate H, Sawada K, Ashikawa A, Chiba M, Shimizu N. Measuring daytime physical activity using triaxial accelerometer in community-dwelling older adults with difficulty to perform outdoor activities. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.3353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Fukuda T, Kino Y, Abe Y, Yamashiro H, Kobayashi J, Shimizu Y, Takahashi A, Suzuki T, Chiba M, Takahashi S, Inoue K, Kuwahara Y, Morimoto M, Shinoda H, Hiji M, Sekine T, Fukumoto M, Isogai E. Cesium radioactivity in peripheral blood is linearly correlated to that in skeletal muscle: Analyses of cattle within the evacuation zone of the Fukushima Daiichi Nuclear Power Plant. Anim Sci J 2014; 86:120-4. [DOI: 10.1111/asj.12301] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Accepted: 07/02/2014] [Indexed: 11/28/2022]
Affiliation(s)
- Tomokazu Fukuda
- Graduate School of Agricultural Sciences; Tohoku University; Sendai Miyagi Japan
| | - Yasushi Kino
- Department of Chemistry; Tohoku University; Sendai Miyagi Japan
| | - Yasuyuki Abe
- National Research Center for Protozoa Diseases; Obihiro University of Agriculture and Veterinary Medicine; Obihiro Hokkaido Japan
| | | | - Jin Kobayashi
- Miyagi University; School of Food, Agricultural and Environmental Sciences; Miyagi Japan
| | - Yoshinaka Shimizu
- Graduate School of Dentistry; Tohoku University; Sendai Miyagi Japan
| | | | - Toshihiko Suzuki
- Graduate School of Dentistry; Tohoku University; Sendai Miyagi Japan
| | - Mirei Chiba
- Graduate School of Dentistry; Tohoku University; Sendai Miyagi Japan
| | - Shintaro Takahashi
- Department of Pathology; Institute of Development, Aging and Cancer; Tohoku University; Sendai Miyagi Japan
| | - Kazuya Inoue
- Department of Pathology; Institute of Development, Aging and Cancer; Tohoku University; Sendai Miyagi Japan
| | - Yoshikazu Kuwahara
- Department of Pathology; Institute of Development, Aging and Cancer; Tohoku University; Sendai Miyagi Japan
| | - Motoko Morimoto
- Miyagi University; School of Food, Agricultural and Environmental Sciences; Miyagi Japan
| | - Hisashi Shinoda
- Graduate School of Dentistry; Tohoku University; Sendai Miyagi Japan
| | - Masahiro Hiji
- Hitachi Solutions East Japan, Ltd; Sendai Miyagi Japan
| | - Tsutomu Sekine
- Center for the Advancement of Higher Education; Tohoku University; Sendai Miyagi Japan
| | - Manabu Fukumoto
- Department of Pathology; Institute of Development, Aging and Cancer; Tohoku University; Sendai Miyagi Japan
| | - Emiko Isogai
- Graduate School of Agricultural Sciences; Tohoku University; Sendai Miyagi Japan
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Goda K, Dobashi A, Yoshimura N, Chiba M, Fukuda A, Nakao Y, Ohya TR, Sasaki Y, Kato M, Aihara H, Sumiyama K, Toyoizumi H, Kato T, Tajiri H, Ikegami M. Clinicopathological features of narrow-band imaging endoscopy and immunohistochemistry in ultraminute esophageal squamous neoplasms. Dis Esophagus 2014; 27:267-75. [PMID: 23796261 DOI: 10.1111/dote.12090] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
To reveal clinicopathological features of narrow-band imaging (NBI) endoscopy and immunohistochemistry in ultraminute esophageal squamous neoplasms. If a lesion diameter was smaller or same compared with a width of closed biopsy forceps, a lesion was defined to be an ultraminute lesion. Twenty-five consecutive patients with 33 ultraminute esophageal lesions that were removed by endoscopic mucosal resection were included in the present study. We conducted two questionnaire surveys of six endoscopists by their retrospective review of endoscopic still images. The six endoscopists evaluated the endoscopic findings of the ultraminute lesions on still images taken by conventional white-light imaging endoscopy and non-magnified NBI endoscopy in the first questionnaire, and taken by magnified NBI endoscopy in the second questionnaire. An experienced pathologist who was unaware of any endoscopic findings made histological diagnosis and evaluated immunoexpression of p53 and Ki67. The 33 ultraminute lesions were all determined to be either 11 high-grade intraepithelial neoplasias (HGIENs) or 22 low-grade intraepithelial neoplasias (LGIENs). The tumor diameters were histologically confirmed to be <3 mm. All of the ultraminute tumors were visualized as unstained areas and brownish areas by real-time endoscopy with Lugol dye staining and non-magnified NBI endoscopy, respectively. All of the ultraminute IENs were visualized as brownish areas by real-time non-magnified NBI endoscopy. Three of the 25 patients with the ultraminute IENs (12%) had multiple brownish areas (more than several areas) in the esophagus on real-time non-magnified NBI endoscopy. All of the ultraminute IENs were visualized as unstained areas by real-time Lugol chromoendoscopy. Twenty of the 25 patients (80%) had multiple unstained areas (more than several areas) in the esophagus on real-time Lugol chromoendoscopy. The first questionnaire survey revealed that a significantly higher detection rate of the ultraminute IENs on non-magnified NBI endoscopy images compared with conventional white-light imaging endoscopy ones (100% vs. 72%, respectively: P < 0.0001). The second questionnaire survey revealed that presence rates of any magnified NBI endoscopy findings were not significantly different between HGIENs and LGIENs. Proliferation, dilation, and various shapes of intrapapillary capillary loops indicated remarkably high presence rates of more than 90% in both HGIENs and LGIENs. Six of 22 LGIENs (27%) and 3 of 11 HGIENs (27%) show a positive expression for p53. None of peri-IEN epithelia was positive for p53. A mean of Ki67 labeling index of LGIENs was 33% and that of HGIENs 36%. Ki67 labeling index was significantly greater in the LGIENs and HGIENs compared with that in the peri-IEN epithelia. There were no significant differences in p53 expression and Ki67 labeling index between the HGIENs and LGIENs. Non-magnified/magnified NBI endoscopy could facilitate visualization and characterization of ultraminute esophageal squamous IENs. The ultraminute HGIENs and LGIENs might have comparable features of magnified NBI endoscopy and immunohistochemistry.
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Affiliation(s)
- K Goda
- Department of Endoscopy, The Jikei University School of Medicine, Tokyo, Japan
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Sootome H, Fujita H, Ochiiwa H, Ito K, Sagara T, Chiba M, Hirai H, Iwasawa Y, Utsugi T. 380 Identification & Biological Characterization of a Highly Potent, Irreversible Inhibitor of FGFR, TAS-2985. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)72178-0] [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: 11/17/2022]
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Abstract
Ionising radiation (IR) causes DNA (deoxyribonucleic acid) injury and activates intracellular signal pathways including the regulation of DNA repair and cell cycle. However, the further knowledge of molecular events involved in radiation exposure is essential to more comprehensively understand the effects of irradiation. Therefore, the gene expressions of mRNA (messenger ribonucleic acid) by X-ray irradiation in human B lymphoblast cell line (IM-9) using a microarray were investigated. The mRNA expressions of 65 genes were shown to be up-regulated at >2.0-fold in irradiated cells (4 Gy) when compared with non-irradiated cells (0 Gy) by microarray analysis. Among 65 genes, a large number of genes were up-regulated with an X-ray dose-dependent change. These results indicate that the up-regulation of their mRNAs is the effects of irradiation and may be due to biological dosimetric markers for the evaluation of radiation exposure in the future.
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Affiliation(s)
- M Chiba
- Division of Medical Life Sciences, Department of Biomedical Sciences, Hirosaki University Graduate School of Health Sciences, 66-1 Hon-cho, Hirosaki, Aomori 036-8564, Japan.
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Kanzaki H, Chiba M, Suzuki M, Taubman M. TNF-alpha Converting Enzyme Degradates Interferon-Gamma. (174.15). The Journal of Immunology 2012. [DOI: 10.4049/jimmunol.188.supp.174.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Infection induced immune responses cause extensive bone destruction in periodontitis. We previously reported that TNF-alpha converting enzyme (TACE) play a role in soluble RANKL and soluble TNF-alpha cleavage from activated lymphocytes in periodontitis, and these soluble osteoclastogenic cytokines induce osteoclast activation from distant site. Interferon-gamma is known as anti-osteoclastogenic cytokine produced from activated T cells, but little is known about the post-transcriptive modification, especially in inflamed tissue. We hypothesized that TACE might modify interferon-gamma and attenuate anti-osteoclastogenic activity. Recombinant interferon-gamma is incubated with intact or heat-inactivated recombinant TACE, electrophoresed in SDS-PAGE gel, and silver stain was done. In addition, the interferon-gamma concentrations of above samples are measured with ELISA. Recombinant TACE is added into the supernatant of activated mouse splenocyte, and measured interferon-gamma concentration. Silver stain revealed that not heat-inactivated but intact recombinant TACE reduced the 16 kDa band of recombinant interferon-gamma. ELISA also showed the reduction of interferon-gamma concentration by the incubation with recombinant TACE. These data suggest that, TACE might degradate interferon-gamma and attenuate anti-osteoclastogenic activity of interferon-gamma produced from activated T cells in periodontitis.
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Affiliation(s)
- Hiroyuki Kanzaki
- 1Department of Orthodontics, Tohoku University Hospital, Sendai, Japan
- 3Department of Immunology, Forsyth Institute, Cambridge, MA
| | - Mirei Chiba
- 2Oral physiology, Tohoku University, Graduate school of dentistry, Sendai, Japan
| | - Maiko Suzuki
- 3Department of Immunology, Forsyth Institute, Cambridge, MA
| | - Martin Taubman
- 3Department of Immunology, Forsyth Institute, Cambridge, MA
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Ichimiya H, Arakawa S, Sato T, Shimada T, Chiba M, Soma Y, Mizoguchi M, Tomonari K, Iwasaka H, Hatano Y, Okamoto O, Fujiwara S. Involvement of brown adipose tissue in subcutaneous fat necrosis of the newborn. Dermatology 2011; 223:207-10. [PMID: 21968020 DOI: 10.1159/000331810] [Citation(s) in RCA: 8] [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] [Received: 05/23/2011] [Accepted: 07/30/2011] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND Subcutaneous fat necrosis (SCFN) of the newborn is a rare condition that manifests within days after birth. The interscapular region, axillae and shoulders are the most commonly affected sites, corresponding to anatomic sites of brown adipose tissue (BAT) in newborns. OBJECTIVE We postulated a specific involvement of BAT in SCFN and searched for brown adipocytes at affected sites. METHODS Biopsy specimens were immunostained with antibodies against uncoupling protein 1 (UCP-1) and examined by electron microscopy. We also examined BAT by (18)F-fluorodeoxyglucose ((18)F-FDG) positron emission tomography and computed tomography (PET-CT) scanning. RESULTS A few cells in biopsy specimens from two patients bound antibodies against UCP-1, and brown adipocytes were detected at several stages of degeneration. PET-CT scans revealed lower uptake of (18)F-FDG at major sites of SCFN. CONCLUSION SCFN and BAT can be found at the same sites, suggesting a pathophysiological connection.
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Affiliation(s)
- H Ichimiya
- Department of Dermatology, Oita Prefectural Hospital, Faculty of Medicine, Oita University, Idaigaoka 1-1, Hasama-machi, Yufu City, Japan
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Abstract
AIMS The aims of this study were to investigate the mechanism of atrophic change in ileal mucosa supplied with an elemental diet (ED) and to assess the value of supplemented fat emulsion in the prevention of atrophic change. MATERIALS AND METHODS In experiment 1, 25 male Wistar rats with a body weight of 160-180 g were divided into 3 groups. The first group was fed regular rat chow (Control group, n=5). The second group was given ED containing 0.6% long-chain triglycerides (ED group, n=10). The third group was provided with fat-enriched ED (FED) containing 3.5% long-chain triglycerides (FED group, n=10). Each group received an isocaloric diet (300 kcal/kg/day). 4 weeks later, after euthanization, ileal samples were taken for light and electron microscopic examinations. The morphological changes of the intestinal mucosa and the crypt cell proliferation rate (CCPR) were determined. In experiment 2, to determine the site of fat absorption, 9 rats were fed ED for 1 week. After 24 h of food deprivation, all rats were given 2 ml of FED through a gastric tube. Then 1, 2, and 3 h(s) later, groups of 3 rats each were euthanized, and the total small intestine was obtained from each rat. The proximal and distal jejunum and distal ileum were stained with oil red O. RESULTS In experiment 1, the samples had almost the same morphological appearance irrespective of the type of feeding. The CCPR was significantly diminished in the ED group compared with the Control group, while there was no statistical difference between the FED and Control groups. In experiment 2, the oil red O stain was positive in the proximal and distal jejunum, but was completely negative in the distal ileum. CONCLUSIONS The introduction of ED does not soon result in an atrophic morphological change of the ileum but will decrease the CCPR. An additive fat emulsion which was rapidly absorbed by the distal jejunum could play a role in maintaining ileal mucosa integrity through some mechanism independent of absorption.
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Affiliation(s)
- S Kawano
- Showa University Fujigaoka Hospital, Department of Pediatric Surgery, Yokohama, Japan.
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Escócio C, Genovez M, Castro V, Piatti R, Gabriel F, Chiebao D, Azevedo S, Vieira S, Chiba M. INFLUÊNCIA DAS CONDIÇÕES AMBIENTAIS NA TRANSMISSÃO DA LEPTOSPIROSE ENTRE CRIAÇÕES DE OVINOS E BOVINOS DA REGIÃO DE SOROCABA, SP. Arq Inst Biol 2010. [DOI: 10.1590/1808-1657v77p3712010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
RESUMO Leptospiras excretadas pela urina podem sobreviver por longos períodos em águas de superfície e solos, na dependência do pH e teor de umidade e de matéria orgânica. Investigou-se a influência do meio ambiente na transmissão da leptospirose em dois rebanhos exclusivos de ovinos (A e C) e dois de ovinos consorciados com bovinos (F e H) da região de Sorocaba, SP, no período de dezembro de 2007 a setembro de 2008. Foram examinadas amostras de soro pela reação de soroaglutinação microscópica; de urina, água e solo pelo cultivo para leptospiras e urina de ovinos pela PCR. Condições edafoclimáticas, pH das águas de superfície e solo, granulometria e permeabilidade do solo foram analisadas. Todos os rebanhos apresentaram pelo menos um animal sororeagente para Leptospira spp. Apenas a PCR de um pool de urina de ovinos (H) foi positiva. Leptospira spp. foi isolada do lago de F. O pH das águas de superfície variou entre 6,0-7,0; e nos solos entre 4,5 e 6,8. Os índices de matéria orgânica em A, C e H variaram de 24 a 35 g/dm3, e 63 g/dm3 em F. A composição do solo de A e F mostrou-se franco-argiloarenosa, C argilosa e H franco-siltosa; como texturas mistas são capazes de manter a umidade, principalmente devido a argila. Diante da presença de animais sororeatores e portanto da circulação de Leptospira spp. nos rebanhos, conclui-se que o ciclo de transmissão é dependente da interação sinérgica e antagônica de muitas variáveis; onde o pastejo num habitat com alto teor de umidade parece ser limitante.
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Ikezawa K, Naito M, Yumiba T, Iwahashi K, Onishi Y, Kita H, Nishio A, Kanno T, Matsuura T, Ono A, Chiba M, Mizuno T, Aketa H, Maeda K, Michida T, Katayama K. Splenectomy and antiviral treatment for thrombocytopenic patients with chronic hepatitis C virus infection. J Viral Hepat 2010; 17:488-92. [PMID: 19840366 DOI: 10.1111/j.1365-2893.2009.01211.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Thrombocytopenic patients with chronic hepatitis C virus (HCV) infection are poor candidates for antiviral treatment with interferon (IFN), but no standard treatment for thrombocytopenia has yet been established. We evaluated the safety of splenectomy and its efficacy for the initiation and continuation of antiviral therapy. From March 2003 to April 2006, 10 patients (mean age 62.5 years) with HCV-related cirrhosis, low platelet count (<==106 000/mm(3)) and splenomegaly (spleen size >==10 cm) underwent splenectomy. Platelet counts significantly increased at 4-8 weeks after splenectomy [pre: 64 200 +/- 6900/mm(3)vs post 209 000 +/- 40 600/mm(3) (P = 0.004)]. No severe operative complications were observed. All patients subsequently received antiviral therapy. Of the eight patients who were infected with HCV genotype 1 and had a high viral load (>==100 KIU/mL), four received combination therapy with pegylated IFNalpha-2b plus ribavirin, and the other four received standard IFNalpha-2b plus ribavirin. One patient infected with HCV genotype 2 and another with HCV genotype 1 and a low viral load (<100 KIU/mL) were treated with pegylated IFNalpha-2a. Six patients achieved sustained virologic response (SVR). Among four patients who failed to achieve SVR, one was given retreatment with pegylated IFN plus ribavirin, and the other three received low-dose long-term IFN therapy. Although this study was small, the treatment results were similar to those for patients without thrombocytopenia and suggested that splenectomy would not reduce the antiviral efficacy of IFNalpha-based treatment.
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Affiliation(s)
- K Ikezawa
- Department of Internal Medicine, Osaka Koseinenkin Hospital, Osaka, Japan
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Yabuki H, Shiono S, Abiko M, Matsumura Y, Okazaki T, Chiba M, Sato T. [Obvious enlargement of the pulmonary hamartoma: report of a case]. Kyobu Geka 2010; 63:419-422. [PMID: 20446614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A 72-year-old man was admitted to our hospital due to abnormal shadow in the right hilum by a routine chest X-ray. When we had another look at a chest X-ray that had been taken 6 years before, we had found a pulmonary nodule of 18 mm in size. The chest X-ray and computed tomography (CT) taken at admission showed a round nodule with calcification in the same site, with increasing in size to 30 mm. The tumor could not be clinically diagnosed and the surgery was scheduled because the nodule had grown and the possibility of a malignant tumor was suggested. At surgery, the tumor was easily enucleated and the pathological diagnosis was chondromatous hamartoma. Although pulmonary hamartoma is a benign tumor, operation should be performed when the tumor had grown.
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Affiliation(s)
- H Yabuki
- Department of Thoracic Surgery, Yamagata Prefectural Central Hospital, Yamagata, Japan
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Chiba M, Kiyosawa H, Hiraiwa N, Ohkohchi N, Yasue H. Existence of Pink1 antisense RNAs in mouse and their localization. Cytogenet Genome Res 2010; 126:259-70. [PMID: 20068297 DOI: 10.1159/000251963] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/07/2009] [Indexed: 11/19/2022] Open
Abstract
PTEN-induced kinase 1 (PINK1), which is identified as the gene transactivated by the tumor suppressor PTEN, has been found to be one of the causative genes in Parkinson's disease (PD). In order to understand PD, rodent models containing affected Pink1 such as loss-of-function mutations have been exploited. Recently, natural antisense RNA of PINK1 has been demonstrated to be involved in the regulation of the PINK1 locus. However, no antisense RNAs of Pink1 except for human have been reported so far. Therefore, in the present study, while searching for the Pink1 antisense RNAs in mouse, we found that the antisense RNAs are transcribed from a mouse genomic region corresponding to the human region from which the antisense RNAs are produced. Further, we investigated the localization of the antisense RNAs in mouse brain using in situ hybridization; this demonstrated that the antisense RNAs were localized in the regions of brain where the Pink1 mRNA was found. In addition, the mRNA and antisense RNAs were found more densely in the hippocampus than in the other brain regions in newborn and 1-week-old mice, while those RNAs were found uniformly in the mouse brain regions of embryo day (E) 14, E17, and 8-weeks-old.
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Affiliation(s)
- M Chiba
- Department of Surgery, Advanced Biomedical Applications, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba , Japan
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Abstract
A non-viral gene delivery approach with nano/microbubbles and ultrasound offers opportunities for targeting soft tissues for gene therapy. The periodontium is a complex structure comprised of hard (cementum, alveolar bone) and soft tissues (periodontal ligament, gingivae). We hypothesized that our established gene delivery method would allow the periodontal tissue to be targeted for transfection for gene therapy. Expression kinetics and sites of transfection sites with this approach were investigated in rat periodontal tissue. Bioluminescence imaging revealed that transient gene expression was induced at day 1 posttransfection, while confocal microscopy showed that gene expression was localized in the muscle cells of gingival tissues. These findings indicate that regular transfection with this approach results in high gene expression, facilitating gene therapy for periodontal disease involving alveolar bone resorption.
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Affiliation(s)
- R Chen
- Molecular Delivery System Laboratory, Department of Biomedical Engineering, Graduate School of Biomedical Engineering, Tohoku University, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
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Abstract
During orthodontic tooth movement, the activation of the vascular system in the compressed periodontal ligament (PDL) is an indispensable process in tissue remodeling. We hypothesized that compressive force would induce angiogenesis of PDL through the production of vascular endothelial growth factor (VEGF). We examined the localization of VEGF in rat periodontal tissues during experimental tooth movement in vivo, and the effects of continuous compressive force on VEGF production and angiogenic activity in human PDL cells in vitro. PDL cells adjacent to hyalinized tissue and alveolar bone on the compressive side showed marked VEGF immunoreactivity. VEGF mRNA expression and production in PDL cells increased, and conditioned medium stimulated tube formation. These results indicate that continuous compressive force enhances VEGF production and angiogenic activity in PDL cells, which may contribute to periodontal remodeling, including angiogenesis, during orthodontic tooth movement.
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Affiliation(s)
- A Miyagawa
- Division of Oral Dysfunction Science, Department of Oral Health and Development Sciences, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
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Hashizume M, Shimoda T, Sasaki S, Kunii O, Caypil W, Dauletbaev D, Chiba M. Anaemia in relation to low bioavailability of dietary iron among school-aged children in the Aral Sea region, Kazakhstan. Int J Food Sci Nutr 2009; 55:37-43. [PMID: 14630590 DOI: 10.1080/09637480310001642466] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
This study investigates anaemia related to the sufficiency of dietary iron intake of school-aged children in the Kzyl-Orda region of Kazakhstan. We conducted a cross-sectional study of 97 school-aged children living in Kzyl-Orda. Blood samples were collected for measuring haemoglobin. Dietary intake data were obtained from 24-h dietary recalls. Iron bioavailability was estimated with algorithms adjusting for absorption enhancers (meat, fish and poultry, and vitamin C) and inhibitors (tea and phytates) consumed in the same meal. The median total iron intakes were adequate compared with the median basal iron requirement; however, the median bioavailable iron intakes were well below the median absorbed iron requirement. Available iron was 6.9-7.2% of the total iron intake after adjusting for the absorption enhancers, and was reduced by 3.1-4.4% after adjusting for both enhancers and inhibitors. After adjustment for energy intake, higher iron intake was significantly associated with a decreased prevalence of anaemia (odds ratio, 0.39; 95% confidence interval, 0.16-0.93; P=0.034). Some evidence suggested an association between bioavailable iron intake after adjustment of absorption enhancers and inhibitors (odds ratio, 0.43; 95% confidence interval, 0.18-1.01; P=0.053). In conclusion, low bioavailability of dietary iron seems related to anaemia in the region. Although iron fortification or supplementation programmes can be useful for promoting the anaemia prevention control programme, further efforts for nutritional education suited for family level dietary practice are necessary.
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Affiliation(s)
- M Hashizume
- Department of International Community Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
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Chiba M, Kubo M, Miura T, Sato T, Rezaeian AH, Kiyosawa H, Ohkohchi N, Yasue H. Localization of sense and antisense transcripts of Prdx2 gene in mouse tissues. Cytogenet Genome Res 2008; 121:222-31. [PMID: 18758163 DOI: 10.1159/000138889] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/25/2008] [Indexed: 11/19/2022] Open
Abstract
Recently, it has been reported that antisense RNAs are transcribed from a large number of genes in various species including human and mouse. The Prdx2 gene, which is indicated to be involved in signal transduction related to platelet-derived growth factor as well as to protection from oxidizing agents, has been shown to produce sense and antisense transcripts. To obtain clues for possible roles of Prdx2 antisense transcripts, we have performed Northern blot analysis and in situ hybridization on tissues of 8-week-old C57BL/6J mice. The Northern blot analysis revealed that major parts of sense and antisense transcripts were poly(A-)-RNA. The analysis of the fractionated RNA of fibroblasts indicated that the poly(A-)-RNA would be localized in the cytoplasm of cells. The in situ hybridization demonstrated that the sense and antisense transcripts were localized in almost the same limited areas of brain, testis, and spleen. It also revealed that the sense and antisense transcripts coexisted in Purkinje cells. In thymus and stomach, the antisense transcripts were detected, but sense transcripts were not. When tissues of BALB/c mice were examined by in situ hybridization, the observations were essentially the same as those of C57BL/6J except that it appeared that the amounts of sense and antisense transcripts in testis of BALB/c were greater than those in C57BL/6J, and that the amounts of antisense transcripts in stomach of BALB/c were much smaller than those in C57BL/6J.
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Affiliation(s)
- M Chiba
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan
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