1
|
Hoshi M, Taira M, Sawada T, Hachinohe Y, Hatakeyama W, Takafuji K, Tekemoto S, Kondo H. Preparation of Collagen/Hydroxyapatite Composites Using the Alternate Immersion Method and Evaluation of the Cranial Bone-Forming Capability of Composites Complexed with Acidic Gelatin and b-FGF. Materials (Basel) 2022; 15:8802. [PMID: 36556608 PMCID: PMC9787395 DOI: 10.3390/ma15248802] [Citation(s) in RCA: 1] [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] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/04/2022] [Accepted: 12/06/2022] [Indexed: 06/17/2023]
Abstract
Bone-substitute materials are essential in dental implantology. We prepared collagen (Col)/hydroxyapatite (Hap)/acidic gelatin (AG)/basic fibroblast growth factor (b-FGF) constructs with enhanced bone-forming capability. The Col/Hap apatite composites were prepared by immersing Col sponges alternately in calcium and phosphate ion solutions five times, for 20 and 60 min, respectively. Then, the sponges were heated to 56 °C for 48 h. Scanning electron microscopy/energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy, and X-ray diffraction analyses showed that the Col/Hap composites contained poorly crystalline Hap precipitates on the Col matrix. Col/Hap composite granules were infiltrated by AG, freeze-dried, and immersed in b-FGF solution. The wet quaternary constructs were implanted in rat cranial bone defects for 8 weeks, followed by soft X-ray measurements and histological analysis. Animal studies have shown that the constructs moderately increase bone formation in cranial bone defects. We found that an alternate immersion time of 20 min led to the greatest bone formation (p < 0.05). Constructs placed inside defects slightly extend the preexisting bone from the defect edges and lead to the formation of small island-like bones inside the defect, followed by disappearance of the constructs. The combined use of Col, Hap, AG, and b-FGF might bring about novel bone-forming biomaterials.
Collapse
Affiliation(s)
- Miki Hoshi
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, 19-1 Uchimaru, Morioka 020-8505, Japan
| | - Masayuki Taira
- Department of Biomedical Engineering, Iwate Medical University, 1-1-1 Idaidori, Yahaba-cho 028-3694, Japan
| | - Tomofumi Sawada
- Department of Biomedical Engineering, Iwate Medical University, 1-1-1 Idaidori, Yahaba-cho 028-3694, Japan
| | - Yuki Hachinohe
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, 19-1 Uchimaru, Morioka 020-8505, Japan
| | - Wataru Hatakeyama
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, 19-1 Uchimaru, Morioka 020-8505, Japan
| | - Kyoko Takafuji
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, 19-1 Uchimaru, Morioka 020-8505, Japan
| | - Shinji Tekemoto
- Department of Biomedical Engineering, Iwate Medical University, 1-1-1 Idaidori, Yahaba-cho 028-3694, Japan
| | - Hisatomo Kondo
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, 19-1 Uchimaru, Morioka 020-8505, Japan
| |
Collapse
|
2
|
Hoshi M, Sawada T, Hatakeyama W, Taira M, Hachinohe Y, Takafuji K, Kihara H, Takemoto S, Kondo H. Characterization of Five Collagenous Biomaterials by SEM Observations, TG-DTA, Collagenase Dissolution Tests and Subcutaneous Implantation Tests. Materials (Basel) 2022; 15:ma15031155. [PMID: 35161098 PMCID: PMC8839282 DOI: 10.3390/ma15031155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 01/24/2022] [Accepted: 01/30/2022] [Indexed: 11/25/2022]
Abstract
Collagenous biomaterials that are clinically applied in dentistry have dermis-type and membrane-type, both of which are materials for promoting bone and soft tissue formation. The properties of materials supplied with different types could affect their biodegradation periods. The purpose of this study was to characterize five of these products by four different methods: scanning electron microscopy (SEM) observation, thermogravimetry-differential thermal analysis (TG-DTA), 0.01 wt% collagenase dissolution test, and subcutaneous implantation test in vivo. SEM micrographs revealed that both dermis and membranous materials were fibrous and porous. The membranous materials had higher specific derivative thermal gravimetry (DTG) peak temperatures in TG-DTA at around 320 °C, longer collagenase dissolution time ranging from about 300 to 500 min, and more longevity in mice exceeding 9 weeks than the dermis materials. There existed a correlation between the peak temperature in TG-DTA and the collagenase dissolution time. It was considered that higher cross-link degree among collagen fibrils of the membrane-type collagenous materials might account for these phenomena. The experimental protocol and numerical results obtained could be helpful for selection and future development of fibrous collagenous biomaterials in clinical use.
Collapse
Affiliation(s)
- Miki Hoshi
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, 19-1 Uchimaru, Morioka 020-8505, Iwate, Japan; (M.H.); (W.H.); (Y.H.); (K.T.); (H.K.); (H.K.)
| | - Tomofumi Sawada
- Department of Biomedical Engineering, Iwate Medical University, 1-1-1 Idaidori, Yahaba-cho 028-3694, Iwate, Japan; (T.S.); (S.T.)
| | - Wataru Hatakeyama
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, 19-1 Uchimaru, Morioka 020-8505, Iwate, Japan; (M.H.); (W.H.); (Y.H.); (K.T.); (H.K.); (H.K.)
| | - Masayuki Taira
- Department of Biomedical Engineering, Iwate Medical University, 1-1-1 Idaidori, Yahaba-cho 028-3694, Iwate, Japan; (T.S.); (S.T.)
- Correspondence: ; Tel.: +81-19-651-5110
| | - Yuki Hachinohe
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, 19-1 Uchimaru, Morioka 020-8505, Iwate, Japan; (M.H.); (W.H.); (Y.H.); (K.T.); (H.K.); (H.K.)
| | - Kyoko Takafuji
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, 19-1 Uchimaru, Morioka 020-8505, Iwate, Japan; (M.H.); (W.H.); (Y.H.); (K.T.); (H.K.); (H.K.)
| | - Hidemichi Kihara
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, 19-1 Uchimaru, Morioka 020-8505, Iwate, Japan; (M.H.); (W.H.); (Y.H.); (K.T.); (H.K.); (H.K.)
| | - Shinji Takemoto
- Department of Biomedical Engineering, Iwate Medical University, 1-1-1 Idaidori, Yahaba-cho 028-3694, Iwate, Japan; (T.S.); (S.T.)
| | - Hisatomo Kondo
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, 19-1 Uchimaru, Morioka 020-8505, Iwate, Japan; (M.H.); (W.H.); (Y.H.); (K.T.); (H.K.); (H.K.)
| |
Collapse
|
3
|
Hoshi M, Kobayashi N, Tanaka K, Somekawa K, Kaneko A, Izawa A, Seki K, Tagami Y, Aoki A, Fujii H, Watanabe K, Horita N, Hara Y, Matsumura M, Enaka M, Hagihara M, Kaneko T. Diagnostic utility of transbronchial biopsy for Hodgkin's lymphoma: A case study. Thorac Cancer 2021; 12:3281-3285. [PMID: 34698453 PMCID: PMC8636206 DOI: 10.1111/1759-7714.14190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/29/2021] [Accepted: 10/01/2021] [Indexed: 11/30/2022] Open
Abstract
Lung lesions of Hodgkin's lymphoma (HL) are rare and difficult to diagnose by nonsurgical biopsy. We herein present the case of a 72-year-old Japanese male who presented with accumulation of lung infiltrates and masses bilaterally on the lungs for 3 years. Although transbronchial lung biopsy (TBB) and computed tomography-guided biopsy were conducted several times, his diagnosis remained inconclusive. On further deterioration of lung lesions, the patient was transferred to our hospital. Positron emission tomography revealed increased accumulation in the bilateral lungs and right supraclavicular lymph nodes. Surgical biopsy of the lymph node was performed. He was finally diagnosed with HL and underwent chemotherapy with doxorubicin, vinblastine, dacarbazine, and brentuximab vedotin. After chemotherapy, the lung lesion showed significant regression. A literature review indicated that the diagnostic success rate of TBB was low (18.5%) in cases of lung lesions in HL.
Collapse
Affiliation(s)
- Miki Hoshi
- Department of PulmonologyYokohama City University Graduate School of MedicineYokohamaJapan
| | - Nobuaki Kobayashi
- Department of PulmonologyYokohama City University Graduate School of MedicineYokohamaJapan
| | - Katsushi Tanaka
- Department of PulmonologyYokohama City University Graduate School of MedicineYokohamaJapan
| | - Kohei Somekawa
- Department of PulmonologyYokohama City University Graduate School of MedicineYokohamaJapan
| | - Ayami Kaneko
- Department of PulmonologyYokohama City University Graduate School of MedicineYokohamaJapan
| | - Ami Izawa
- Department of PulmonologyYokohama City University Graduate School of MedicineYokohamaJapan
| | - Kenichi Seki
- Department of PulmonologyYokohama City University Graduate School of MedicineYokohamaJapan
| | - Yoichi Tagami
- Department of PulmonologyYokohama City University Graduate School of MedicineYokohamaJapan
| | - Ayako Aoki
- Department of PulmonologyYokohama City University Graduate School of MedicineYokohamaJapan
| | - Hiroaki Fujii
- Department of PulmonologyYokohama City University Graduate School of MedicineYokohamaJapan
| | - Keisuke Watanabe
- Department of PulmonologyYokohama City University Graduate School of MedicineYokohamaJapan
| | - Nobuyuki Horita
- Department of PulmonologyYokohama City University Graduate School of MedicineYokohamaJapan
| | - Yu Hara
- Department of PulmonologyYokohama City University Graduate School of MedicineYokohamaJapan
| | - Mai Matsumura
- Department of PathologyYokohama City University Graduate School of MedicineYokohamaJapan
| | - Makiko Enaka
- Department of Molecular PathologyYokohama City University Graduate School of MedicineYokohamaJapan
| | - Maki Hagihara
- Department of Hematology and Clinical ImmunologyYokohama City University Graduate School of MedicineYokohamaJapan
| | - Takeshi Kaneko
- Department of PulmonologyYokohama City University Graduate School of MedicineYokohamaJapan
| |
Collapse
|
4
|
Apsalikov KN, Lipikhina A, Grosche B, Belikhina T, Ostroumova E, Shinkarev S, Stepanenko V, Muldagaliev T, Yoshinaga S, Zhunussova T, Hoshi M, Katayama H, Lackland DT, Simon SL, Kesminiene A. The State Scientific Automated Medical Registry, Kazakhstan: an important resource for low-dose radiation health research. Radiat Environ Biophys 2019; 58:1-11. [PMID: 30446811 DOI: 10.1007/s00411-018-0762-5] [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] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 11/07/2018] [Indexed: 06/09/2023]
Abstract
Direct quantitative assessment of health risks following exposure to ionizing radiation is based on findings from epidemiological studies. Populations affected by nuclear bomb testing are among those that allow such assessment. The population living around the former Soviet Union's Semipalatinsk nuclear test site is one of the largest human cohorts exposed to radiation from nuclear weapons tests. Following research that started in the 1960s, a registry that contains information on more than 300,000 individuals residing in the areas neighboring to the test site was established. Four nuclear weapons tests, conducted from 1949 to 1956, resulted in non-negligible radiation exposures to the public, corresponding up to approximately 300 mGy external dose. The registry contains relevant information about those who lived at the time of the testing as well as about their offspring, including biological material. An international group of scientists worked together within the research project SEMI-NUC funded by the European Union, and concluded that the registry provides a novel, mostly unexplored, and valuable resource for the assessment of the population risks associated with environmental radiation exposure. Suggestions for future studies and pathways on how to use the best dose assessment strategies have also been described in the project. Moreover, the registry could be used for research on other relevant public health topics.
Collapse
Affiliation(s)
- K N Apsalikov
- Scientific Research Institute for Radiation Medicine and Ecology, 258 Gagarina Street, Semey, 490007, Kazakhstan
| | - A Lipikhina
- Scientific Research Institute for Radiation Medicine and Ecology, 258 Gagarina Street, Semey, 490007, Kazakhstan
| | - B Grosche
- Federal Office for Radiation Protection, Neuherberg, Germany.
- , Grasmückenweg 19, 85356, Freising, Germany.
| | - T Belikhina
- Scientific Research Institute for Radiation Medicine and Ecology, 258 Gagarina Street, Semey, 490007, Kazakhstan
| | - E Ostroumova
- International Agency for Research on Cancer, 150 Cours Albert Thomas, 96372, Lyon Cedex 08, France
| | - S Shinkarev
- State Research Center-Burnasyan Federal Medical Biophysical Center, 46 Zhivopisnaya Street, Moscow, 123182, Russian Federation
| | - V Stepanenko
- A. Tsyb Medical Radiological Research Center, 4, Koroleva Street, Obninsk, 249036, Russian Federation
| | - T Muldagaliev
- Scientific Research Institute for Radiation Medicine and Ecology, 258 Gagarina Street, Semey, 490007, Kazakhstan
| | - S Yoshinaga
- Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, Hiroshima, 734-8553, Japan
| | - T Zhunussova
- Norwegian Radiation Protection Authority, Grini Naeringspark 13, 1332, Osteraas, Norway
| | - M Hoshi
- Institute for Peace Science, Hiroshima University, Higashisenda-machi 1-1-89, Naka-ku, Hiroshima, 730-0053, Japan
| | - H Katayama
- The Comprehensive Data Archives and Analysis (CDAA), 6-7, Hacchobori, Naka-ku, Hiroshima, 730-0013, Japan
| | - D T Lackland
- Medical University of South Carolina, 19 Hagood Ave, Charleston, SC, 29425-8350, USA
| | - S L Simon
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, 9609 Medical Center Drive, Bethesda, MD, 20892-9778, USA
| | - A Kesminiene
- International Agency for Research on Cancer, 150 Cours Albert Thomas, 96372, Lyon Cedex 08, France
| |
Collapse
|
5
|
Grahl S, Pongratz V, Schmidt P, Engl C, Bussas M, Radetz A, Gonzalez-Escamilla G, Groppa S, Zipp F, Lukas C, Kirschke J, Zimmer C, Hoshi M, Berthele A, Hemmer B, Mühlau M. Evidence for a white matter lesion size threshold to support the diagnosis of relapsing remitting multiple sclerosis. Mult Scler Relat Disord 2019; 29:124-129. [PMID: 30711877 DOI: 10.1016/j.msard.2019.01.042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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: 12/14/2018] [Revised: 01/23/2019] [Accepted: 01/25/2019] [Indexed: 10/27/2022]
Abstract
BACKGROUND The number of white matter lesions (WML) in brain MRI is the most established paraclinical tool to support the diagnosis of multiple sclerosis (MS) and to monitor its course. Diagnostic criteria have stipulated a minimum detectable diameter of 3 mm per WML, although this threshold is not evidence-based. We aimed to provide a rationale for a WML size threshold for three-dimensional MRI sequences at 3 T by comparing patients with relapsing-remitting MS (RRMS) to control subjects (CS). METHODS We analyzed MR images from two cohorts, obtained at scanners from two different vendors, each comprising patients with RRMS and CS. Both cohorts were examined with FLAIR and T1w sequences. In total, 232 patients with RRMS (Expanded Disability Status Scale: mean = 1.6 ± 1.2; age: mean = 36 ± 10) as well as 116 age- and sex-matched CS were studied. We calculated odds ratios across WML volumes. The WML size threshold, which discriminated best between patients and CS, was estimated with receiver operating characteristic curve analysis. RESULTS In both cohorts, odds ratios increased continuously with increasing WML volumes, and discriminative power was highest at a WML size threshold corresponding to a diameter of about 3 mm. CONCLUSION The stipulated WML size threshold of 3 mm in diameter for the diagnostic criteria of MS seems a reasonable choice for three-dimensional MRI sequences at 3 T.
Collapse
Affiliation(s)
- S Grahl
- Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81541, Munich, Germany; TUM Neuroimaging Center, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81541, Munich, Germany
| | - V Pongratz
- Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81541, Munich, Germany; TUM Neuroimaging Center, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81541, Munich, Germany
| | - P Schmidt
- Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81541, Munich, Germany; TUM Neuroimaging Center, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81541, Munich, Germany
| | - C Engl
- Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81541, Munich, Germany; TUM Neuroimaging Center, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81541, Munich, Germany
| | - M Bussas
- Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81541, Munich, Germany; TUM Neuroimaging Center, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81541, Munich, Germany
| | - A Radetz
- Neurology, University Medical Centre of the Johannes Gutenberg University Mainz and Neuroimaging Center of the Focus Program Translational Neuroscience (FTN-NIC), Langenbeckstr. 1, 55131, Mainz, Germany
| | - G Gonzalez-Escamilla
- Neurology, University Medical Centre of the Johannes Gutenberg University Mainz and Neuroimaging Center of the Focus Program Translational Neuroscience (FTN-NIC), Langenbeckstr. 1, 55131, Mainz, Germany
| | - S Groppa
- Neurology, University Medical Centre of the Johannes Gutenberg University Mainz and Neuroimaging Center of the Focus Program Translational Neuroscience (FTN-NIC), Langenbeckstr. 1, 55131, Mainz, Germany; German Competence Network Multiple Sclerosis (KKNMS)
| | - F Zipp
- Neurology, University Medical Centre of the Johannes Gutenberg University Mainz and Neuroimaging Center of the Focus Program Translational Neuroscience (FTN-NIC), Langenbeckstr. 1, 55131, Mainz, Germany; German Competence Network Multiple Sclerosis (KKNMS)
| | - C Lukas
- German Competence Network Multiple Sclerosis (KKNMS); Diagnostic and Interventional Radiology and Nuclear Medicine, St Josef Hospital, Ruhr, University Bochum, Gudrunstr. 56, 44791, Bochum, Germany
| | - J Kirschke
- Department of Neuroradiology, Technische Universität München, Ismaninger Str. 22, 81541, Munich, Germany
| | - C Zimmer
- Department of Neuroradiology, Technische Universität München, Ismaninger Str. 22, 81541, Munich, Germany
| | - M Hoshi
- Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81541, Munich, Germany
| | - A Berthele
- Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81541, Munich, Germany
| | - B Hemmer
- Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81541, Munich, Germany; German Competence Network Multiple Sclerosis (KKNMS); Munich Cluster for Systems Neurology (SyNergy), Feodor-Lynen-Str. 17, 81377, Munich, Germany
| | - M Mühlau
- Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81541, Munich, Germany; TUM Neuroimaging Center, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81541, Munich, Germany; German Competence Network Multiple Sclerosis (KKNMS).
| |
Collapse
|
6
|
Kobayashi T, Tanaka K, Bengua G, Hoshi M, Nakagawa Y. Small Accelerators for the Next Generation of BNCT Irradiation Systems. Fusion Science and Technology 2017. [DOI: 10.13182/fst05-a639] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Kobayashi
- Research Reactor Institute, Kyoto University, Osaka 590-0494, Japan
| | - K. Tanaka
- RIRBM, Hiroshima University, Hiroshima 734-8553, Japan
| | - G. Bengua
- Research Reactor Institute, Kyoto University, Osaka 590-0494, Japan
| | - M. Hoshi
- RIRBM, Hiroshima University, Hiroshima 734-8553, Japan
| | - Y. Nakagawa
- National Kagawa Children’s Hospital, Kagawa 765-8501, Japan
| |
Collapse
|
7
|
Yeltokova M, Zharliganova D, Shaidarov M, Bakhtin M, Kazymbet P, Tel L, Dossakhanov A, Kozhakbayeva M, Hoshi M. Deterministic effect of lens at leukergy of patients who received low doses of ionising radiation. Radiat Prot Dosimetry 2015; 166:324-327. [PMID: 25969524 DOI: 10.1093/rpd/ncv296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
To explore the possibility to use the lens extract as an in vitro stimulator to conduct a test of stimulated leukergy in liquidators of the accident consequences (LAC) on Chernobyl Nuclear Power Plant (CNPP) with a cataract in the long-term period. The study sample included 72 men-LAC on CNPP, at the age from 42 to 65 y, who have a cataract. The comparison group consisted of 60 men, with a cataract, of the same age, and who were not exposed to radiation. The control group was composed of 60 men, at the age of 42-58 y without lens pathology. Phenomenon of the stimulated leukergy was revealed in persons who had been exposed to radiation in the dose of 18.2 ± 0.58 cGy and was observed in 5.7-8.05 % (P < 0.001), suggesting a continued high auto-aggression to the lens antigens, and the strength of cell-mediated immunity.
Collapse
Affiliation(s)
- M Yeltokova
- JSC 'Medical University Astana', Institute of Radiobiological Research, 49A Beibetshilik Str., Astana City 010000, Kazakhstan
| | - D Zharliganova
- JSC 'Medical University Astana', Institute of Radiobiological Research, 49A Beibetshilik Str., Astana City 010000, Kazakhstan
| | - M Shaidarov
- JSC 'Medical University Astana', Institute of Radiobiological Research, 49A Beibetshilik Str., Astana City 010000, Kazakhstan
| | - M Bakhtin
- JSC 'Medical University Astana', Institute of Radiobiological Research, 49A Beibetshilik Str., Astana City 010000, Kazakhstan
| | - P Kazymbet
- JSC 'Medical University Astana', Institute of Radiobiological Research, 49A Beibetshilik Str., Astana City 010000, Kazakhstan
| | - L Tel
- JSC 'Medical University Astana', Institute of Radiobiological Research, 49A Beibetshilik Str., Astana City 010000, Kazakhstan
| | - A Dossakhanov
- ISC 'National Medical Research Center', 42 Ablaykhan Str., Astana City 010000, Kazakhstan
| | - M Kozhakbayeva
- ISC 'National Medical Research Center', 42 Ablaykhan Str., Astana City 010000, Kazakhstan
| | - M Hoshi
- Research Institute for Biology and Medicine Hiroshima University, 1-2-3 Kasumi, Hinamiku, Hiroshima 134-8553, Japan
| |
Collapse
|
8
|
Ieguchi M, Hoshi M, Takada J, Oebisu N, Aono M, Ban Y, Nakamura H. 3419 Knee reconstruction with endoprosthesis after extraarticular and intraarticur resection of osteosarcoma. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31893-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
9
|
Shinkarev SM, Kotenko KV, Granovskaya EO, Yatsenko VN, Imanaka T, Hoshi M. Estimation of the contribution of short-lived radioiodines to the thyroid dose for the public in case of inhalation intake following the Fukushima accident. Radiat Prot Dosimetry 2015; 164:51-56. [PMID: 25394649 DOI: 10.1093/rpd/ncu335] [Citation(s) in RCA: 9] [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: 06/04/2023]
Abstract
The purpose of this paper is to present (1) the method of assessing the contribution of short-lived radioiodines to the thyroid for members of the public in Fukushima and neighbouring prefectures based on available data and (2) the results of a realistic assessment of such a contribution. The estimates of that contribution for the inhalation intake that occurred on the day of the main fallout (15 March 2011) are within 15 % of the dose to the thyroid from (131)I. The contribution to the thyroid dose from intake of (132)Te is higher than that from the intake of (133)I by a factor of ∼3. The contribution of short-lived radioiodines to the thyroid dose for the public in the case of inhalation intake occurring as early as March 12 might be as great as 30-40 %.
Collapse
Affiliation(s)
- S M Shinkarev
- State Research Center-Burnasyan Federal Medical Biophysical Center, Federal Medical Biological Agency, Zhivopisnaya, 46, Moscow 123182, Russia
| | - K V Kotenko
- State Research Center-Burnasyan Federal Medical Biophysical Center, Federal Medical Biological Agency, Zhivopisnaya, 46, Moscow 123182, Russia
| | - E O Granovskaya
- State Research Center-Burnasyan Federal Medical Biophysical Center, Federal Medical Biological Agency, Zhivopisnaya, 46, Moscow 123182, Russia
| | - V N Yatsenko
- State Research Center-Burnasyan Federal Medical Biophysical Center, Federal Medical Biological Agency, Zhivopisnaya, 46, Moscow 123182, Russia
| | - T Imanaka
- Research Reactor Institute, Kyoto University, Kumatori-cho, Osaka 590-0494, Japan
| | - M Hoshi
- Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| |
Collapse
|
10
|
Tachibana D, Koyama M, Saito M, Hoshi M, Imai R, Kamada T. Heavy ion radiotherapy for recurrent metastatic lung tumor during pregnancy. Eur J Obstet Gynecol Reprod Biol 2015; 184:127. [DOI: 10.1016/j.ejogrb.2014.11.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 11/04/2014] [Accepted: 11/11/2014] [Indexed: 11/30/2022]
|
11
|
Hult M, Marissens G, Sahin N, Hoshi M, Hasai H, Shizuma K, Tanaka K, Endo S. Distribution of 60Co in steel samples from Hiroshima. Appl Radiat Isot 2012; 70:1974-6. [PMID: 22406217 DOI: 10.1016/j.apradiso.2012.02.077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2011] [Accepted: 02/19/2012] [Indexed: 11/18/2022]
Abstract
This paper describes ultra low-level gamma-ray spectrometry measurements of the (60)Co activity distribution inside one 52 mm and one 41 mm thick steel sample. The samples had been exposed to the Hiroshima atomic bomb and were from the Aioi bridge and the Yokogawa bridge. Both samples were measured in a recent study aiming to back up model calculation of Hiroshima dosimetry. The (60)Co activity distributions found in this study support the assumptions made in the previous study.
Collapse
Affiliation(s)
- M Hult
- European Commission, Joint Research Centre, Institute for Reference Materials and Measurements (IRMM), Retieseweg 111, B-2440 Geel, Belgium.
| | | | | | | | | | | | | | | |
Collapse
|
12
|
|
13
|
Zhumadilov K, Ivannikov A, Zharlyganova D, Zhumadilov Z, Stepanenko V, Abralina S, Sadvokasova L, Zhumadilova A, Toyoda S, Endo S, Okamoto T, Hoshi M. ESR dosimetry study for the residents of Kazakhstan exposed to radioactive fallout on 24, August 1956. RADIAT MEAS 2011. [DOI: 10.1016/j.radmeas.2011.05.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
14
|
Tonda T, Satoh K, Otani K, Sato Y, Maruyama H, Kawakami H, Tashiro S, Hoshi M, Ohtaki M. P1-357 Statistical analysis of spatial survival data and its application to the cohort study of Hiroshima atomic bomb survivors. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976f.49] [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: 11/03/2022]
|
15
|
Yatabe J, Saito F, Ishida I, Sato A, Hoshi M, Suzuki K, Kameda T, Ueno S, Yatabe MS, Watanabe T, Sanada H. Lower plasma arginine in enteral tube-fed patients with pressure ulcer and improved pressure ulcer healing after arginine supplementation by Arginaid Water. J Nutr Health Aging 2011; 15:282-6. [PMID: 21437560 DOI: 10.1007/s12603-010-0306-4] [Citation(s) in RCA: 14] [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: 11/26/2022]
Abstract
OBJECTIVES To determine the presence or extent of arginine deficiency in pressure ulcer (PU) patients on percutaneous endoscopic gastrostomy (PEG) feeding and to examine the effects of arginine supplementation on PU healing. DESIGN All eligible PEG patients, with and without PU, were cross-sectionally assessed for plasma arginine. Three-month supplementation with arginine-enriched water (Arginaid Water) was performed on a subset of patients with PU. This intervention study was a prospective, non-controlled trial with 5 PU patients. SETTING Geriatric ward of a rural clinical hospital in Japan. PARTICIPANTS Thirty-nine inpatients with PEG feeding were assessed for plasma arginine. Five of the 13 patients with PU and five of 26 patients without PU underwent amino acid profiling. INTERVENTION Five of the patients with PU received Arginaid Water supplementation. MEASUREMENTS Plasma amino acid measurements and biochemical analyses were performed. For those with PU on Arginaid Water supplementation, plasma arginine concentration and PU status were monitored every month. RESULTS Patients with PU showed significantly lower plasma arginine concentration compared to those without PU (control vs. PU; 80.2±21.3 vs 62.8±14.7 nmol/ml, p<0.01). After the addition of Arginaid Water, plasma arginine concentration increased (before vs 3 months later; 57.9±1.8 vs 83.1±8.5, p<0.01), and PU area, perimeter, DESIGN-R and PUSH scores significantly improved. CONCLUSION Plasma arginine was lower in PEG patients with PU. The healing rate of PU is improved with Arginaid Water supplementation. The findings from this study support the use of arginine supplementation in PEG patients with PU.
Collapse
Affiliation(s)
- J Yatabe
- Division of Health Science Research, Fukushima Welfare Federation of Agricultural Cooperatives, Fukushima, Japan.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Dinkel A, Hausteiner C, Hoshi M, Hemmer B, Henningsen P. Progredienzangst und psychischer Distress bei Multipler Sklerose. Psychother Psych Med 2011. [DOI: 10.1055/s-0031-1272367] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
17
|
Dinkel A, Hausteiner C, Hoshi M, Hemmer B, Henningsen P. Fatigue bei Multipler Sklerose. Psychother Psych Med 2011. [DOI: 10.1055/s-0031-1272366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
18
|
Khvostunov IK, Nikjoo H, Uehara S, Hoshi M. The consideration of biological effectiveness of low energy protons using biophysical modeling of the effects induced by exposure of V79 cells. Biophysics (Nagoya-shi) 2010. [DOI: 10.1134/s0006350910060321] [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: 11/22/2022] Open
|
19
|
Sakaguchi A, Kawai K, Steier P, Imanaka T, Hoshi M, Endo S, Zhumadilov K, Yamamoto M. Feasibility of using 236U to reconstruct close-in fallout deposition from the Hiroshima atomic bomb. Sci Total Environ 2010; 408:5392-5398. [PMID: 20797770 DOI: 10.1016/j.scitotenv.2010.07.073] [Citation(s) in RCA: 9] [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: 04/14/2010] [Revised: 07/26/2010] [Accepted: 07/28/2010] [Indexed: 05/29/2023]
Abstract
The first results on the feasibility of using (236)U to reconstruct the level and spatial distribution of close-in fallout deposition from the Hiroshima A-bomb are reported, coupled with the use of global fallout (137)Cs and (239+240)Pu. The results for global fallout (236)U in soil samples (0-30cm) from Ishikawa prefecture showed that the deposition density of (236)U from the global fallout can be accurately evaluated using AMS. All deposited (236)U, (137)Cs and (239+240)Pu appeared to have been recovered using 30-cm cores. It was also noted from the depth profiles for (236)U/(239+240)Pu and (236)U/(137)Cs ratios that the downward behavior of (236)U in the soil was apparently similar to that of (239+240)Pu, while the (137)Cs was liable to be retained in upper layers compared with (236)U and (239+240)Pu. The accumulated levels were 1.78×10(13)atomsm(-2) for (236)U, 4340Bqm(-2) for (137)Cs and 141Bqm(-2) for (239+240)Pu. The ratios of (236)U/(137)Cs and (236)U/(239+240)Pu were (4.10±0.12)×10(9) and (1.26±0.04)×10(11)atomsBq(-1), respectively. Results of (236)U, (137)Cs and (239+240)Pu measurements for the seven soil cores (0-30cm) from Hiroshima were discussed on the basis of ratios of (236)U/(137)Cs and (236)U/(239+240)Pu by comparing with those from the background area in Ishikawa, indicating that the global fallout dominates the current level of (236)U accumulation in soil in the Black-rain area around Hiroshima after the Hiroshima bomb, and the contribution of the close-in fallout (236)U produced by the Hiroshima A-bomb seems difficult to observe.
Collapse
Affiliation(s)
- A Sakaguchi
- Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
20
|
Koyama K, Takahashi M, Nakai N, Takakusa H, Murai T, Hoshi M, Yamamura N, Kobayashi N, Okazaki O. Pharmacokinetics and disposition of CS-8958, a long-acting prodrug of the novel neuraminidase inhibitor laninamivir in rats. Xenobiotica 2010; 40:207-16. [PMID: 20146556 DOI: 10.3109/00498250903447691] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CS-8958, a prodrug of laninamivir (R-125489), is currently under development as an inhaled anti-influenza drug. In this study, the pharmacokinetics and disposition of CS-8958 were characterized in rats. After intratracheal administration of 14C-CS-8958, radioactivity was retained over long periods in the target tissues (trachea and lung) as its active metabolite R-125489 - 19.12% of the dose was retained in the lung at 24 h. After intratracheal administration of CS-8958, plasma R-125489 concentration was slowly eliminated, and its half-life (14.1 h) was considerably longer than that after intravenous administration of R-125489. The radioactivity of intratracheally administered 14C-CS-8958 was mainly excreted into the urine (67.5% of dose), and this excretion lasted over long periods. R-125489 accounted for most of the urinary radioactivity recovered after 24 h. These results demonstrated that CS-8958 administered intratracheally to rats was converted/hydrolysed to R-125489 in the target tissues, and that the R-125489 was slowly excreted into the urine via an absorption rate-limiting process. Such distinctive pharmacokinetics attributed to the slow release of R-125489 suggests the potential for a long-acting anti-influenza drug.
Collapse
Affiliation(s)
- K Koyama
- Drug Metabolism & Pharmacokinetics Research Laboratories, Daiichi Sankyo Co., Ltd, Tokyo, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Ivannikov AI, Sanin D, Nalapko M, Skvortsov VF, Stepanenko VF, Tsyb AF, Trompier F, Zhumadilov K, Hoshi M. Dental enamel EPR dosimetry: comparative testing of the spectra processing methods for determination of radiation-induced signal amplitude. Health Phys 2010; 98:345-351. [PMID: 20065704 DOI: 10.1097/hp.0000348462.29306.59] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The aim of this investigation is to find out the optimal algorithm for mathematical processing of the EPR spectra of irradiated tooth enamel for estimating the amplitude of the radiation-induced signal, which is used for determination of the absorbed dose in enamel for retrospective individual dosimetry. A recently developed analytical model, which takes into account the line shape variation of the enamel EPR spectral components registered at different microwave power, was applied to spectra processing in various operation modes to simulate spectra processing techniques differing by the number of fitted parameters. The precision of dose determination at spectra processing was assessed by the root mean square deviation between experimental and nominal doses for sets of spectra of enamel samples irradiated in different doses and measured at different microwave power. It is shown that in the case of pooled enamel samples prepared as a mixture from different teeth, the higher precision of spectra processing is obtained using a model with fixed native background signal line shape (characterized by width and asymmetry parameters). In case of individual samples prepared each from a different tooth, better results are obtained using a model with variable background signal line shape.
Collapse
Affiliation(s)
- A I Ivannikov
- Medical Radiological Research Center (MRRC), Koroliov str., 4, Obninsk, 249036, Russia.
| | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Khailov AM, Ivannikov AI, Skvortsov VG, Stepanenko VF, Tsyb AF, Trompier F, Hoshi M. The neutron dose conversion coefficients calculation in human tooth enamel in an anthropomorphic phantom. Health Phys 2010; 98:369-377. [PMID: 20065707 DOI: 10.1097/hp.0b013e3181a86610] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In the present study, MCNP4B simulation code is used to simulate neutron and photon transport. It gives the conversion coefficients that relate neutron fluence to the dose in tooth enamel (molars and pre-molars only) for 20 energy groups of monoenergetic neutrons with energies from 10-9 to 20 MeV for five different irradiation geometries. The data presented are intended to provide the basis for connection between EPR dose values and standard protection quantities defined in ICRP Publication 74. The results of the calculations for critical organs were found to be consistent with ICRP data, with discrepancies generally less than 10% for the fast neutrons. The absorbed dose in enamel was found to depend strongly on the incident neutron energy for neutrons over 10 keV. The dependence of the data on the irradiation geometry is also shown. Lower bound estimates of enamel radiation sensitivity to neutrons were made using obtained coefficients for the secondary photons. Depending on neutron energy, tooth enamel was shown to register 10-120% of the total neutron dose in the human body in the case of pure neutron exposure and AP irradiation geometry.
Collapse
Affiliation(s)
- A M Khailov
- Medical Radiological Research Center, Korolyov str., 4, Obninsk 249036, Russia
| | | | | | | | | | | | | |
Collapse
|
23
|
Khvostunov IK, Nikjoo H, Uehara S, Hoshi M. The consideration of biological effectiveness of low energy protons using biophysical modeling of the effects induced by exposure of V79 cells. Radiats Biol Radioecol 2010; 50:81-89. [PMID: 20297685] [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
We have applied Monte Carlo track structure simulations to estimate relative biological effectiveness (RBE) of low-energy protons using biophysical modelling of radiation effects induced by exposure of V79 cells growing in mono-layer. The microscopic energy deposition in cell nucleus and sub-nucleus volumes was investigated in order to understand the reasons of enhanced biological effectiveness near Bragg peak. Theoretical estimations of RBE based on frequency/dose average lineal energy and calculated yields of initial DNA breaks were collated with experimental RBE(M) data. It was found: 1) dose average lineal energy for whole cell nucleus as a function of proton energy shows a distinct peak at 550 keV; 2) the peak values for sub-nucleus volumes are large compared with the whole cell nucleus; 3) the yield of complex DNA breaks correlates with experimental RBE(M) data.
Collapse
Affiliation(s)
- I K Khvostunov
- Medical Radiological Research Centre, Obninsk, Kaluga Region, Russia.
| | | | | | | |
Collapse
|
24
|
Hoshi M, Uehara S, Yamamoto O, Sawada S, Asao T, Kobayashi K, Maezawa H, Furusawa Y, Hieda K, Yamada T. Iron(II) Sulphate (Fricke Solution) Oxidation Yields for 8·9 and 13·6keV X-rays from Synchrotron Radiation. Int J Radiat Biol 2009; 61:21-7. [PMID: 1345927 DOI: 10.1080/09553009214550581] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The oxidation yields (G) for 8.86 and 13.55 keV X-rays produced by synchrotron radiation were measured using an iron(II) sulphate (Fricke) solution. Monoenergetic X-rays were produced using a silicon crystal monochromator. The X-rays were absorbed in 0.4 M sulphuric acid-iron(II) sulphate solution and FeIII ion yields were measured and corrected for escape fractions resulting from scattering using Monte Carlo calculations. Doses in the solution were determined using a thin window, parallel plate chamber calibrated against a primary standard free-air chamber at the Electrotechnical Laboratory (Osaka, Japan). Yields (G) of 1.50 +/- 0.06 and 1.43 +/- 0.06 mumol J-1 were obtained for 8.86 and 13.55 keV X-rays respectively.
Collapse
Affiliation(s)
- M Hoshi
- Research Institute for Nuclear Medicine and Biology, Hiroshima University, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Sakaguchi A, Kawai K, Steier P, Quinto F, Mino K, Tomita J, Hoshi M, Whitehead N, Yamamoto M. First results on 236U levels in global fallout. Sci Total Environ 2009; 407:4238-4242. [PMID: 19406452 DOI: 10.1016/j.scitotenv.2009.01.058] [Citation(s) in RCA: 24] [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] [Subscribe] [Scholar Register] [Received: 11/12/2008] [Revised: 01/19/2009] [Accepted: 01/22/2009] [Indexed: 05/27/2023]
Abstract
The global fallout (236)U level in soil was deduced from measurements of (236)U, (239+240)Pu and (137)Cs in surface soils which are solely influenced by global fallout. A total of 12 soil cores from the depths of 0-10, 0-20 and 0-30 cm were collected at a flat forest area in Japan. Concentrations of (239+240)Pu and (238)U were determined by alpha-particle spectrometry, while the (236)U/(238)U ratio was measured with accelerator mass spectrometry (AMS). Consistent (236)U/(239)Pu ratios between 0.212 and 0.253 were found. Using this ratio, the total global fallout of (236)U on the earth is estimated to be as much as ca. 900 kg. This knowledge will contribute to the promotion of research on U isotopes, including (236)U, for the fields of geo-resources, waste management and geochemistry.
Collapse
Affiliation(s)
- A Sakaguchi
- Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Marchetti AA, McAninch JE, Rugel G, Rühm W, Korschinek G, Martinelli RE, Faestermann T, Knie K, Egbert SD, Wallner A, Wallner C, Tanaka K, Endo S, Hoshi M, Shizuma K, Fujita S, Hasai H, Imanaka T, Straume T. Fast neutrons measured in copper from the Hiroshima atomic bomb dome. Radiat Res 2009; 171:118-22. [PMID: 19138052 DOI: 10.1667/rr1436.1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2008] [Accepted: 08/19/2008] [Indexed: 11/03/2022]
Abstract
The first measurements of (63)Ni produced by A-bomb fast neutrons (above approximately 1 MeV) in copper samples from Hiroshima encompassed distances from approximately 380 to 5062 m from the hypocenter (the point on the ground directly under the bomb). They included the region of interest to survivor studies (approximately 900 to 1500 m) and provided the first direct validation of fast neutrons in that range. However, a significant measurement gap remained between the hypocenter and 380 m. Measurements close to the hypocenter are important as a high-value anchor for the slope of the curve for neutron activation as a function of distance. Here we report measurements of (63)Ni in copper samples from the historic Hiroshima Atomic Bomb Dome, which is located approximately 150 m from the hypocenter. These measurements extend the range of our previously published data for (63)Ni providing a more comprehensive and consistent A-bomb activation curve. The results are also in good agreement with calculations based on the current dosimetry system (DS02) and give further experimental support to the accuracy of this system that forms the basis for radiation risk estimates worldwide.
Collapse
Affiliation(s)
- A A Marchetti
- Lawrence Livermore National Laboratory, Livermore, CA 94550, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Shibata S, Takamiya K, Ota Y, Nogawa N, Ito Y, Shibata T, Hoshi M, Endo S, Hasai H, Fujita S. Measurement of 63Ni produced in Cu samples by the Hiroshima atomic bomb. J Radioanal Nucl Chem 2009. [DOI: 10.1007/s10967-008-7414-1] [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: 11/24/2022]
|
28
|
Hoshi M, Yasuoka H, Kuwana M. Estrogen receptor gene polymorphisms in Japanese patients with systemic sclerosis. Clin Exp Rheumatol 2008; 26:914-917. [PMID: 19032828] [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: 05/27/2023]
Abstract
OBJECTIVE To investigate whether single-nucleotide polymorphisms (SNPs) within the estrogen receptor (ER) alpha and Beta genes are associated with disease susceptibility and clinical presentation in Japanese patients with systemic sclerosis (SSc). METHODS Three SNPs, ERalpha PvuII T/C, ERalpha XbaI A/G, and ERBeta RsaI G/A, were genotyped using polymerase-chain reaction combined with restriction fragment length polymorphisms in 103 patients with SSc and 56 race-matched healthy controls. The distribution of the individual ER SNPs in SSc patients with or without SSc-related organ involvement and serum antinuclear antibodies was determined. RESULTS The frequency of the ERalpha XbaI GG phenotype was significantly lower in SSc patients than in healthy controls (2% vs. 13%, p=0.005, odds ratio=0.14, 95%CI 0.03-0.69), and no significant association was detected for the other SNPs. Except in the case of heart involvement accompanying SSc, there was no significant association of the ER SNPs with SSc-related individual organ involvement or with antinuclear antibody profiles. Specifically, the ERalpha PvuII CC phenotype was significantly more frequent among patients with heart involvement compared with those without it (75% vs. 14%, p=0.0001, odds ratio=17.4, 95%CI 3.2-94.8). CONCLUSION SNPs located within the ERalpha gene may contribute to disease susceptibility and to certain clinical manifestations of SSc patients.
Collapse
Affiliation(s)
- M Hoshi
- Department of Internal Medicine, Den-en Chofu Central Hospital, Tokyo, Japan
| | | | | |
Collapse
|
29
|
Yamamoto M, Oikawa S, Sakaguchi A, Tomita J, Hoshi M, Apsalikov KN. Determination of 240Pu/239Pu isotopic ratios in human tissues collected from areas around the Semipalatinsk Nuclear Test Site by sector-field high resolution ICP-MS. Health Phys 2008; 95:291-299. [PMID: 18695410 DOI: 10.1097/01.hp.0000314807.29873.71] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Information on the 240Pu/239Pu isotope ratios in human tissues for people living around the Semipalatinsk Nuclear Test Site (SNTS) was deduced from 9 sets of soft tissues and bones, and 23 other bone samples obtained by autopsy. Plutonium was radiochemically separated and purified, and plutonium isotopes (239Pu and 240Pu) were determined by sector-field high resolution inductively coupled plasma-mass spectrometry. For most of the tissue samples from the former nine subjects, low 240Pu/239Pu isotope ratios were determined: bone, 0.125 +/- 0.018 (0.113-0.145, n = 4); lungs, 0.063 +/- 0.010 (0.051-0.078, n = 5); and liver, 0.148 +/- 0.026 (0.104-0.189, n = 9). Only 239Pu was detected in the kidney samples; the amount of 240Pu was too small to be measured, probably due to the small size of samples analyzed. The mean 240Pu/239Pu isotope ratio for bone samples from the latter 23 subjects was 0.152 +/- 0.034, ranging from 0.088 to 0.207. A significant difference (a two-tailed Student's t test; 95% significant level, alpha = 0.05) between mean 240Pu/239Pu isotope ratios for the tissue samples and for the global fallout value (0.178 +/- 0.014) indicated that weapons-grade plutonium from the atomic bombs has been incorporated into the human tissues, especially lungs, in the residents living around the SNTS. The present 239,240Pu concentrations in bone, lung, and liver samples were, however, not much different from ranges found for human tissues from other countries that were due solely to global fallout during the 1970's-1980's.
Collapse
Affiliation(s)
- M Yamamoto
- Low Level Radioactivity Laboratory, K-INET, Kanazawa University, Wake, Nomi-shi, Ishikawa 923-1224, Japan.
| | | | | | | | | | | |
Collapse
|
30
|
Hoshi M, Endo S, Tanaka K, Ishikawa M, Straume T, Komura K, Rühm W, Nolte E, Huber T, Nagashima Y, Seki R, Sasa K, Sueki K, Fukushima H, Egbert SD, Imanaka T. Intercomparison study on (152)Eu gamma ray and (36)Cl AMS measurements for development of the new Hiroshima-Nagasaki Atomic Bomb Dosimetry System 2002 (DS02). Radiat Environ Biophys 2008; 47:313-322. [PMID: 18389270 DOI: 10.1007/s00411-008-0166-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2007] [Accepted: 03/16/2008] [Indexed: 05/26/2023]
Abstract
In the process of developing a new dosimetry system for atomic bomb survivors in Hiroshima and Nagasaki (DS02), an intercomparison study between (152)Eu and (36)Cl measurements was proposed, to reconcile the discrepancy previously observed in the Hiroshima data between measurements and calculations of thermal neutron activation products. Nine granite samples, exposed to the atomic-bomb radiation in Hiroshima within 1,200 m of the hypocenter, as well as mixed standard solutions containing known amounts of europium and chlorine that were neutron-activated by a (252)Cf source, were used for the intercomparison. Gamma-ray spectrometry for (152)Eu was carried out with ultra low-background Ge detectors at the Ogoya Underground Laboratory, Kanazawa University, while three laboratories participated in the (36)Cl measurement using accelerator mass spectrometry (AMS): The Technical University of Munich, Germany, the Lawrence Livermore National Laboratory, USA and the University of Tsukuba, Japan. Measured values for the mixed standard solutions showed good agreement among the participant laboratories. They also agreed well with activation calculations, using the neutron fluences monitored during the (252)Cf irradiation, and the corresponding activation cross-sections taken from the JENDL-3.3 library. The measured-to-calculated ratios obtained were 1.02 for (152)Eu and 0.91-1.02 for (36)Cl, respectively. Similarly, the results of the granite intercomparison indicated good agreement with the DS02 calculation for these samples. An average measured-to-calculated ratio of 0.98 was obtained for all granite intercomparison measurements. The so-called neutron discrepancy that was previously observed and that which included increasing measured-to-calculated ratios for thermal neutron activation products for increasing distances beyond 1,000 m from the hypocenter was not seen in the results of the intercomparison study. The previously claimed discrepancy could be explained by insufficient understanding of the measured data.
Collapse
Affiliation(s)
- M Hoshi
- Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8553, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Sasaki MS, Nomura T, Ejima Y, Utsumi H, Endo S, Saito I, Itoh T, Hoshi M. Experimental Derivation of Relative Biological Effectiveness of A-Bomb Neutrons in Hiroshima and Nagasaki and Implications for Risk Assessment. Radiat Res 2008; 170:101-17. [DOI: 10.1667/rr1249.1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2007] [Accepted: 04/07/2008] [Indexed: 11/03/2022]
|
32
|
Aono M, Nakamura H, Ieguchi M, Hoshi M, Taguchi S, Takami M. Radiofrequency ablation for metastatic bone tumors. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.20720] [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: 11/20/2022] Open
|
33
|
Yamamoto M, Tomita J, Sakaguchi A, Imanaka T, Fukutani S, Endo S, Tanaka K, Hoshi M, Gusev BI, Apsalikov AN. Spatial distribution of soil contamination by 137Cs and 239,240Pu in the village of Dolon near the Semipalatinsk nuclear test site: new information on traces of the radioactive plume from the 29 August 1949 nuclear test. Health Phys 2008; 94:328-337. [PMID: 18332724 DOI: 10.1097/01.hp.0000298224.17669.8e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The village of Dolon located about 60 km northeast from the border of the Semipalatinsk Nuclear Test Site in Kazakhstan is one of the most affected inhabited settlements as a result of nuclear tests by the former USSR. Radioactive contamination in Dolon was mainly caused by the first USSR nuclear test on 29 August 1949. As part of the efforts to reconstruct the radiation dose in Dolon, Cs and Pu in soil samples collected from 26 locations in the vicinity of and within the village were measured to determine the width and position of the center-axis of the radioactive plume that passed over the village from the 29 August 1949 nuclear test. Measured soil inventories of Cs and Pu were plotted as a function of the distance from the supposed center-axis of the plume. A clear shape similar to a Gaussian function was observed in their spatial distributions with each maximum around a center-axis. It was suggested that the plume width that contaminated Dolon was at most 10 km and the real center-axis of the radioactive plume passed 0.7-0.9 km north of the supposed centerline. A peak-like shape with the maximum near the center-axis was also observed in the spatial distribution of the Pu/Cs activity ratio, which may reflect the fractionation effect between Pu and Cs during the deposition process. These results support the recently reported results. The data obtained here will provide useful information on the efforts to estimate radiation dose in Dolon as reliably as possible. Health Phys. 94(4):328-337; 2008.
Collapse
Affiliation(s)
- M Yamamoto
- Low Level Radioactivity Laboratory, Kanazawa University, Wake, Nomi-shi, Ishikawa 923-1224, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Whitehead NE, Endo S, Tanaka K, Takatsuji T, Hoshi M, Fukutani S, Ditchburn RG, Zondervan A. A preliminary study on the use of (10)Be in forensic radioecology of nuclear explosion sites. J Environ Radioact 2008; 99:260-70. [PMID: 17904707 DOI: 10.1016/j.jenvrad.2007.07.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2006] [Revised: 07/12/2007] [Accepted: 07/30/2007] [Indexed: 05/17/2023]
Abstract
Cosmogenic (10)Be, known for use in dating studies, unexpectedly is also produced in nuclear explosions with an atom yield almost comparable to (e.g.) (137)Cs. There are major production routes via (13)C(n, alpha)(10)Be, from carbon dioxide in the air and the organic explosives, possibly from other bomb components and to a minor extent from the direct fission reaction. Although the detailed bomb components are speculative, carbon was certainly present in the explosives and an order of magnitude calculation is possible. The (n, alpha) cross-section was determined by irradiating graphite in a nuclear reactor, and the resulting (10)Be estimated by Accelerator Mass Spectrometry (AMS) giving a cross-section of 34.5+/-0.7mb (6-9.3MeV), within error of previous work. (10)Be should have applications in forensic radioecology. Historical environmental samples from Hiroshima, and Semipalatinsk (Kazakhstan) showed two to threefold (10)Be excesses compared with the background cosmogenic levels. A sample from Lake Chagan (a Soviet nuclear cratering experiment) contained more (10)Be than previously reported soils. (10)Be may be useful for measuring the fast neutron dose near the Hiroshima bomb hypocenter at neutron energies double those previously available.
Collapse
Affiliation(s)
- N E Whitehead
- Institute of Radiation Biology and Medicine, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima 734-8553 Japan.
| | | | | | | | | | | | | | | |
Collapse
|
35
|
Endo S, Shizuma K, Tanaka K, Ishikawa M, Rühm W, Egbert SD, Hoshi M. Radioactivity in atomic-bomb samples from exposure to environmental neutrons. Health Phys 2007; 93:689-695. [PMID: 17993849 DOI: 10.1097/01.hp.0000278420.51860.2d] [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: 05/25/2023]
Abstract
For about one decade, activation measurements performed on environmental samples from a distance larger than 1 km from the hypocenter of the atomic-bomb explosion over Hiroshima suggested much higher thermal neutron fluences to the survivors than predicted. This caused concern among the radiation protection community and prompted a complete re-evaluation of all aspects of survivor dosimetry. While it was shown recently that secondary neutrons from cosmic radiation and other sources have probably been the reason for the high measured concentrations of the long-lived radioisotope 36Cl in these samples, the source for high measured concentrations of the short-lived radionuclides 152Eu and 60Co has not yet been investigated in detail. In order to quantify the production of 152Eu and 60Co in environmental samples by secondary neutrons from cosmic radiation, thermal neutron fluxes were measured by means of a He gas proportional counter in various buildings where these samples had been and still are being stored. Because a 252Cf neutron source has been operated occasionally close to one of the sample storage rooms, additional neutron flux measurements were carried out when the neutron source was in operation. The thermal neutron fluxes measured ranged from 0.00017 to 0.00093 n cm(-2) s(-1) and depended on the floor number of the investigated building. Based on the measured neutron fluxes, the specific activities from the reactions 151Eu(n,gamma)152Eu and 59Co(n,gamma)60Co in the atomic-bomb samples were estimated to be 7.9 mBq g(-1) Eu and 0.27 mBq g(-1) Co, respectively, in saturation. These activities are much lower than those recently measured in samples that had been exposed to atomic-bomb neutrons. It is therefore concluded that environmental and moderated 252Cf neutrons are not the source for the high activities that had been measured in these samples.
Collapse
Affiliation(s)
- S Endo
- Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan.
| | | | | | | | | | | | | |
Collapse
|
36
|
Rühm W, Carroll KL, Egbert SD, Faestermann T, Knie K, Korschinek G, Martinelli RE, Marchetti AA, McAninch JE, Rugel G, Straume T, Wallner A, Wallner C, Fujita S, Hasai H, Hoshi M, Shizuma K. Neutron-induced 63Ni in copper samples from Hiroshima and Nagasaki: a comprehensive presentation of results obtained at the Munich Maier-Leibnitz Laboratory. Radiat Environ Biophys 2007; 46:327-38. [PMID: 17828415 DOI: 10.1007/s00411-007-0126-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2007] [Accepted: 07/22/2007] [Indexed: 05/17/2023]
Abstract
Those inhabitants of Hiroshima and Nagasaki who were affected by the A-bomb explosions, were exposed to a mixed neutron and gamma radiation field. Few years later about 120,000 survivors of both cities were selected, and since then radiation-induced late effects such as leukemia and solid tumors are being investigated in this cohort. When the present study was initiated, the fast neutron fluences that caused the neutron doses of these survivors had never been determined experimentally. In principle, this would have been possible if radioisotopes produced by fast neutrons from the A-bomb explosions had been detected in samples from Hiroshima and Nagasaki at distances where the inhabitants survived. However, no suitable radioisotope had so far been identified. As a contribution to a large international effort to re-evaluate the A-bomb dosimetry, the concentration of the radionuclide (63)Ni (half-life 100.1 years) has been measured in copper samples from Hiroshima and Nagasaki. These measurements were mainly performed at the Maier-Leibnitz-Laboratory in Munich, Germany, by means of accelerator mass spectrometry. Because the (63)Ni had been produced in these samples by fast A-bomb neutrons via the reaction (63)Cu(n,p)(63)Ni, these measurements allow direct experimental validation of calculated neutron doses to the members of the LSS cohort, for the first time. The results of these efforts have already been published in a compact form. A more detailed discussion of the methodical aspects of these measurements and their results are given in the present paper. Eight copper samples that had been significantly exposed to fast neutrons from the Hiroshima A-bomb explosion were investigated. In general, measured (63)Ni concentrations decreased in these samples with increasing distance to the hypocenter, from 4 x 10(6 ) (63)Ni nuclei per gram copper at 391 m, to about 1 x 10(5 ) (63)Ni nuclei per gram copper at about 1,400 m. Additional measurements performed on three large-distant copper samples from Hiroshima (distance to the hypocenter 1,880-7,500 m) and on three large-distant copper samples from Nagasaki (distance to the hypocenter 3,931-4,428 m) that were not exposed significantly to A-bomb neutrons, suggest a typical background concentration of about 8 x 10(4 ) (63)Ni nuclei per gram copper. If the observed background is accounted for, the results are consistent with state-of-the-art neutron transport calculations for Hiroshima, in particular for those distances where the victims survived and were included in the life span study cohort.
Collapse
Affiliation(s)
- W Rühm
- Institute for Radiation Protection, GSF National Research Center for Environment and Health, Ingolstädter Landstrasse 1, Neuherberg, Germany.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Golikov V, Wallström E, Wöhni T, Tanaka K, Endo S, Hoshi M. Evaluation of conversion coefficients from measurable to risk quantities for external exposure over contaminated soil by use of physical human phantoms. Radiat Environ Biophys 2007; 46:375-82. [PMID: 17643259 DOI: 10.1007/s00411-007-0121-4] [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] [Received: 02/13/2007] [Accepted: 06/14/2007] [Indexed: 05/16/2023]
Abstract
Conversion coefficients from measurable quantities such as air kerma free-in-air or personal dose equivalent to effective dose were determined by phantom experiments. Heterogenic anthropomorphic phantoms representing children of one and five years age, and a Rando phantom representing an adult were exposed in the open field contaminated by different levels of radiocesium in the upper soil layer, in a forest site and inside a wooden house. LiF thermoluminescent (TL) detectors were used inside the phantoms for the estimation of organ doses and effective dose. Personal dosimeters similar to those used in radiation protection for individual dose measurements were placed onto the phantom surface (chest area). The ratios of dose values in separate organs to air kerma free-in-air varied from 0.69 to 1.15 for the children phantoms, and from 0.55 to 0.94 for the adult phantom, respectively, when irradiated in the open field. Body size (weight) was found to be the most important factor influencing the values of the conversion coefficients. The differences observed can reach approximately 40% when comparing conversion factors from air kerma free-in-air to effective dose for adults and newborns. For conversion coefficients from personal dose to effective dose, these differences can reach approximately 15%. The dependences of the various conversion coefficients on body mass were quantified by regression analysis. The results were compared with those calculated for a plane mono-energetic photon source having an energy of 700 keV and being located in the ground at a depth of 0.5 g cm(-2). Calculated and measured conversion coefficients from air kerma free-in-air to effective dose agreed within 12%.
Collapse
Affiliation(s)
- V Golikov
- Institute of Radiation Hygiene, Mira str. 8, St Petersburg, Russia.
| | | | | | | | | | | |
Collapse
|
38
|
Nagao Y, Saeki K, Hoshi M, Takahashi Y, Kanagawa H. Effects of water quality on in vitro fertilization and development of bovine oocytes in protein-free medium. Theriogenology 2007; 44:433-44. [PMID: 16727742 DOI: 10.1016/0093-691x(95)00197-g] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/1994] [Accepted: 04/16/1995] [Indexed: 10/17/2022]
Abstract
Examination was made of the effects of water quality in medium preparation on fertilization and early development of bovine in vitro matured (IVM) oocytes in a protein-free medium. The IVM oocytes were inseminated and cultured for 7 d in protein-free media prepared with 4 different types of water preparations: tap, deionized, twice-distilled, and purified water using the Milli-Q system (Milli-Q water). High frequencies (70 to 83%) of normal fertilization were obtained in media prepared with all types of water. However, the frequency of development to the blastocyst stage in media prepared with Milli-Q water (31 +/- 3%) was significantly higher than with the 3 other types of water (11 to 13%). Moreover, the effects of storage period of Milli-Q water on early development of bovine embryos was also examined. The frequency of development to the blastocyst stage in media prepared with Milli-Q water immediately after preparation (fresh Milli-Q water; 35 +/- 4%) was significantly higher than for Milli-Q water stored for 1 wk (18 +/- 4%) or 2 wk (18 +/- 3%). Effects of commercially available purified water on early development of bovine embryos were also examined. The frequency of development to the blastocyst stage in media prepared with Milli-Q water (33 +/- 5%) was significantly higher than for purified water purchased from 3 different suppliers (Brand A; 21 +/- 6%, Brand B; 21 +/- 2%, Brand C; 21 +/- 4%). Each water sample was analyzed by the measurement of electrical conductivity, organic compounds and/or inorganic ion and endotoxin concentrations to evaluate purity. Fresh Milli-Q water showed the lowest level of electrical conductivity and contained the lowest concentration of organic compounds. These results indicate that in vitro fertilization of bovine oocytes is not affected by the water quality in the preparation of medium; however, early development of bovine embryos is seriously affected by the purification method and the storage period of water used for medium preparation.
Collapse
Affiliation(s)
- Y Nagao
- Department of Theriogenology, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido 060, Japan
| | | | | | | | | |
Collapse
|
39
|
Toyoda S, Romanyukha A, Hino Y, Itano S, Imata H, Tarasov O, Hoshi M. Effect of chemical treatment on ESR dosimetry of cow teeth: Application to the samples from Southern Urals. RADIAT MEAS 2007. [DOI: 10.1016/j.radmeas.2007.05.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
40
|
Borysheva N, Ivannikov A, Tikunov D, Orlenko S, Skvortsov V, Stepanenko V, Hoshi M. Taking into account absorbed doses in tooth enamel due to internal irradiation of human body by radioactive cesium isotopes at analysis EPR dosimetry data: Calculation by Monte-Carlo method. RADIAT MEAS 2007. [DOI: 10.1016/j.radmeas.2007.05.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
41
|
Stepanenko V, Hoshi M, Ivannikov A, Bailiff I, Zhumadilov K, Skvortsov V, Argembaeva R, Tsyb A. The 1st Nuclear Test in the former USSR of 29 August 1949: Comparison of individual dose estimates by modeling with EPR retrospective dosimetry and luminescence retrospective dosimetry data for Dolon village, Kazakhstan. RADIAT MEAS 2007. [DOI: 10.1016/j.radmeas.2007.05.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
42
|
Komura K, Hoshi M, Endo S, Imanaka T, Egbert SD, Rühm W, Fukushima H, Fujita S. Atomic bomb induced 152Eu: reconciliation of discrepancy between measurements and calculation. Health Phys 2007; 92:366-77. [PMID: 17351501 DOI: 10.1097/01.hp.0000251246.58759.2f] [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: 05/14/2023]
Abstract
In order to resolve the discrepancy between the measured and calculated 152Eu activity induced by the atomic bomb at Hiroshima, extremely low background gamma-ray spectrometry was performed for 17 granite samples collected from 134 m to more than 3 km from the hypocenter. Measurements agreed well with theoretical calculations based on DS02 up to 1.4 km from hypocenter.
Collapse
Affiliation(s)
- K Komura
- Low Level Radioactivity Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Wake, Tatsunokuchi-machi, Ishikawa 923-1224, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
43
|
Islam MS, Kawase O, Hase S, Hoshi M, Matsumoto M. PKA activation in concert with ARIS and asterosap induces the acrosome reaction in starfish. ZYGOTE 2007; 14:329-40. [PMID: 17266791 DOI: 10.1017/s0967199406003881] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2005] [Accepted: 02/08/2006] [Indexed: 11/05/2022]
Abstract
The acrosome reaction (AR) is a fundamental event for fertilization, which is induced in concert with acrosome reaction-inducing substance (ARIS) and asterosap, both of which are components of starfish egg jelly (EJ). During the AR, a spermatozoon undergoes a series of physiological changes, such as in intracellular cGMP concentration ([cGMP]i), pHi and intracellular Ca2+ concentration ([Ca2+]i). Affinity purification of cGMP-binding protein resulted in the isolation of a regulatory subunit of the cAMP-dependent protein kinase A (PKA), suggesting the involvement of a cAMP-dependent pathway in the AR. By using a cAMP enzyme immunoassay, [cAMP]i was found to increase in starfish spermatozoa when stimulated with ARIS and asterosap. ARIS could also increase the [cAMP]i in the presence of high pH seawater. Pretreatment of spermatozoa with two specific and cell-permeable PKA inhibitors, H89 and KT5720, prevented the induction of the AR in a concentration-dependent manner. These results suggest that PKA activity participates in the induction of the AR with ARIS and asterosap. To investigate this, we have cloned a gene that encodes a regulatory subunit of PKA that had been identified in starfish spermatozoa.
Collapse
Affiliation(s)
- M Sadiqul Islam
- Department of Biosciences and Informatics, Keio University, Yokohama, Japan
| | | | | | | | | |
Collapse
|
44
|
Affiliation(s)
- A. Arase
- a Department of Industrial Chemistry , Kitami Institute of Technology , Koencho Kitami , 090 , Japan
| | - M. Hoshi
- a Department of Industrial Chemistry , Kitami Institute of Technology , Koencho Kitami , 090 , Japan
| | - A. Mijin
- a Department of Industrial Chemistry , Kitami Institute of Technology , Koencho Kitami , 090 , Japan
| | - K. Nishi
- a Department of Industrial Chemistry , Kitami Institute of Technology , Koencho Kitami , 090 , Japan
| |
Collapse
|
45
|
Sasaki MS, Endo S, Ejima Y, Saito I, Okamura K, Oka Y, Hoshi M. Effective dose of A-bomb radiation in Hiroshima and Nagasaki as assessed by chromosomal effectiveness of spectrum energy photons and neutrons. Radiat Environ Biophys 2006; 45:79-91. [PMID: 16807767 DOI: 10.1007/s00411-006-0051-6] [Citation(s) in RCA: 10] [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: 02/17/2006] [Accepted: 05/08/2006] [Indexed: 05/10/2023]
Abstract
The effective dose of combined spectrum energy neutrons and high energy spectrum gamma-rays in A-bomb survivors in Hiroshima and Nagasaki has long been a matter of discussion. The reason is largely due to the paucity of biological data for high energy photons, particularly for those with an energy of tens of MeV. To circumvent this problem, a mathematical formalism was developed for the photon energy dependency of chromosomal effectiveness by reviewing a large number of data sets published in the literature on dicentric chromosome formation in human lymphocytes. The chromosomal effectiveness was expressed by a simple multiparametric function of photon energy, which made it possible to estimate the effective dose of spectrum energy photons and differential evaluation in the field of mixed neutron and gamma-ray exposure with an internal reference radiation. The effective dose of reactor-produced spectrum energy neutrons was insensitive to the fine structure of the energy distribution and was accessible by a generalized formula applicable to the A-bomb neutrons. Energy spectra of all sources of A-bomb gamma-rays at different tissue depths were simulated by a Monte Carlo calculation applied on an ICRU sphere. Using kerma-weighted chromosomal effectiveness of A-bomb spectrum energy photons, the effective dose of A-bomb neutrons was determined, where the relative biological effectiveness (RBE) of neutrons was expressed by a dose-dependent variable RBE, RBE(gamma, D (n)), against A-bomb gamma-rays as an internal reference radiation. When the newly estimated variable RBE(gamma, D (n)) was applied to the chromosome data of A-bomb survivors in Hiroshima and Nagasaki, the city difference was completely eliminated. The revised effective dose was about 35% larger in Hiroshima, 19% larger in Nagasaki and 26% larger for the combined cohort compared with that based on a constant RBE of 10. Since the differences are significantly large, the proposed effective dose might have an impact on the magnitude of the risk estimates deduced from the A-bomb survivor cohort.
Collapse
Affiliation(s)
- M S Sasaki
- Radiation Biology Center, Kyoto University, Yoshida-konoecho, Sakyo-ku, Kyoto, 606-8501, Japan.
| | | | | | | | | | | | | |
Collapse
|
46
|
Cattaneo F, Pasini ME, Intra J, Matsumoto M, Briani F, Hoshi M, Perotti ME. Identification and expression analysis of Drosophila melanogaster genes encoding beta-hexosaminidases of the sperm plasma membrane. Glycobiology 2006; 16:786-800. [PMID: 16733265 DOI: 10.1093/glycob/cwl007] [Citation(s) in RCA: 48] [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: 11/12/2022] Open
Abstract
Sperm surface beta-N-acetylhexosaminidases are among the molecules mediating early gamete interactions in invertebrates and vertebrates, including man. The plasma membrane of Drosophila spermatozoa contains two beta-N-acetylhexosaminidases, DmHEXA and DmHEXB, which are required for egg fertilization. Here, we demonstrate that three putative Drosophila melanogaster genes predicted to code for beta-N-acetylhexosaminidases, Hexo1, Hexo2, and fdl, are all expressed in the male germ line. fdl codes for a homolog of the alpha-subunit of the mammalian lysosomal beta-N-acetylhexosaminidase Hex A. Hexo1 and Hexo2 encode two homologs of the beta-subunit of all known beta-N-acetylhexosaminidases, which we have named beta(1) and beta(2), respectively. Immunoblot analysis of sperm proteins indicated that the gene products associate in different heterodimeric combinations forming DmHEXA, with an alphabeta(2) structure, and DmHEXB, with a beta(1)beta(2) structure. Immunofluorescence demonstrated that all the gene products localized to the sperm plasma membrane. Although none of the genes was testis-specific, fdl was highly and preferentially expressed in the testis, whereas Hexo1 and Hexo2 showed broader tissue expression. Enzyme assays carried out on testis and on a variety of somatic tissues corroborated the results of gene expression analysis. These findings for the first time show the in vivo expression in insects of genes encoding beta-N-acetylhexosaminidases, the only molecules so far identified as involved in sperm/egg recognition in this class, whereas in mammals, the organisms where these enzymes have been best studied, only two types of polypeptide chains forming dimeric functional beta-N-acetylhexosaminidases are present in Drosophila three different gene products are available that might generate numerous dimeric isoforms.
Collapse
Affiliation(s)
- F Cattaneo
- Department of Biosciences and Informatics, Keio University, Kohoku Ku, Yokohama, Kanagawa 2238522, Japan
| | | | | | | | | | | | | |
Collapse
|
47
|
Wieser A, Debuyst R, Fattibene P, Meghzifene A, Onori S, Bayankin SN, Brik A, Bugay A, Chumak V, Ciesielski B, Hoshi M, Imata H, Ivannikov A, Ivanov D, Junczewska M, Miyazawa C, Penkowski M, Pivovarov S, Romanyukha A, Romanyukha L, Schauer D, Scherbina O, Schultka K, Sholom S, Skvortsov V, Stepanenko V, Thomas JA, Tielewuhan E, Toyoda S, Trompier F. The Third International Intercomparison on EPR Tooth Dosimetry: part 2, final analysis. Radiat Prot Dosimetry 2006; 120:176-83. [PMID: 16702247 DOI: 10.1093/rpd/nci549] [Citation(s) in RCA: 20] [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] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The objective of the Third International Intercomparison on EPR Tooth Dosimetry was to evaluate laboratories performing tooth enamel dosimetry <300 mGy. Final analysis of results included a correlation analysis between features of laboratory dose reconstruction protocols and dosimetry performance. Applicability of electron paramagnetic resonance (EPR) tooth dosimetry at low dose was shown at two applied dose levels of 79 and 176 mGy. Most (9 of 12) laboratories reported the dose to be within 50 mGy of the delivered dose of 79 mGy, and 10 of 12 laboratories reported the dose to be within 100 mGy of the delivered dose of 176 mGy. At the high-dose tested (704 mGy) agreement within 25% of the delivered dose was found in 10 laboratories. Features of EPR dose reconstruction protocols that affect dosimetry performance were found to be magnetic field modulation amplitude in EPR spectrum recording, EPR signal model in spectrum deconvolution and duration of latency period for tooth enamel samples after preparation.
Collapse
Affiliation(s)
- A Wieser
- Institute of Radiation Protection, GSF-National Research Centre for Environment and Health, D-85758 Neuherberg, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
48
|
Wieser A, Debuyst R, Fattibene P, Meghzifene A, Onori S, Bayankin SN, Blackwell B, Brik A, Bugay A, Chumak V, Ciesielski B, Hoshi M, Imata H, Ivannikov A, Ivanov D, Junczewska M, Miyazawa C, Pass B, Penkowski M, Pivovarov S, Romanyukha A, Romanyukha L, Schauer D, Scherbina O, Schultka K, Shames A, Sholom S, Skinner A, Skvortsov V, Stepanenko V, Tielewuhan E, Toyoda S, Trompier F. The 3rd international intercomparison on EPR tooth dosimetry: Part 1, general analysis. Appl Radiat Isot 2005; 62:163-71. [PMID: 15607443 DOI: 10.1016/j.apradiso.2004.08.027] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The objective of the 3rd International Intercomparison on Electron Paramagnetic Resonance (EPR) Tooth Dosimetry was the evaluation of laboratories performing tooth enamel dosimetry below 300 mGy. Participants had to reconstruct the absorbed dose in tooth enamel from 11 molars, which were cut into two halves. One half of each tooth was irradiated in a 60Co beam to doses in the ranges of 30-100 mGy (5 samples), 100-300 mGy (5 samples), and 300-900 mGy (1 sample). Fourteen international laboratories participated in this intercomparison programme. A first analysis of the results and an overview of the essential features of methods applied in different laboratories are presented. The relative standard deviation of results of all methods was better than 27% for applied doses in the range of 79-704 mGy. In the analysis of the unirradiated tooth halves 8% of the samples were identified as outliers with additional absorbed dose above background dose.
Collapse
Affiliation(s)
- A Wieser
- GSF-National Research Centre for Environment and Health, Institute of Radiation Protection, Postfach 1129, D-85758 Neuherberg, Germany.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Toyoda S, Tielewuhan E, Romanyukha A, Ivannikov A, Miyazawa C, Hoshi M, Imata H. Comparison of three methods of numerical procedures for ESR dosimetry of human tooth enamel. Appl Radiat Isot 2005; 62:181-5. [PMID: 15607445 DOI: 10.1016/j.apradiso.2004.08.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three numerical methods were employed to examine how gamma ray doses ranging from 100 mGy to 1Gy could be reconstructed using five human molar teeth. For samples above 28 0mGy, the obtained doses are consistent with each other within the errors but slightly larger than actually given doses. Background doses range from 20 to 170 mGy depending on the methods and samples. Further precise studies would be needed to characterize each method, but it would be recommended to apply several methods to check the reliability of the obtained doses.
Collapse
Affiliation(s)
- S Toyoda
- Department of Applied Physics, Okayama University of Science, 1-1 Ridai, Okayama 700-005, Japan.
| | | | | | | | | | | | | |
Collapse
|
50
|
|