1
|
Inoue K, Fukunaga T, Takeshita H, Fujita Y, Kameo S, Hoshi M, Kawano N. Identifying focal points to prevent traffic accidents in Japan and specific measures proposed: Aspects common to Japan and South Korea and suggested preventive measures. Med Sci Law 2024:258024241245873. [PMID: 38576325 DOI: 10.1177/00258024241245873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Affiliation(s)
- Ken Inoue
- Research and Education Faculty, Medical Sciences Cluster, Health Service Center, Kochi University, Kochi, Japan
| | | | - Haruo Takeshita
- Department of Legal Medicine, Faculty of Medicine, Shimane University, Shimane, Japan
| | - Yasuyuki Fujita
- Department of Legal Medicine, Faculty of Medicine, Shimane University, Shimane, Japan
- Faculty of Medicine, Shimane University, Shimane, Japan
| | - Satomi Kameo
- Department of Nutrition, College of Nutrition, Koshien University, Hyogo, Japan
| | - Masaharu Hoshi
- The Center for Peace, Hiroshima University, Hiroshima, Japan
| | - Noriyuki Kawano
- The Center for Peace, Hiroshima University, Hiroshima, Japan
| |
Collapse
|
2
|
Stepanenko V, Shinkarev S, Kaprin A, Apsalikov K, Ivanov S, Shegay P, Ostroumova E, Kesminiene A, Lipikhina A, Bogacheva V, Zhumadilov K, Yamamoto M, Sakaguchi A, Endo S, Fujimoto N, Grosche B, Iatsenko V, Androsova A, Apsalikova Z, Kawano N, Hoshi M. Comparison of external dose estimates using different retrospective dosimetry methods in the settlements located near Semipalatinsk Nuclear Test Site, Republic of Kazakhstan. J Radiat Res 2024; 65:36-46. [PMID: 37981331 PMCID: PMC10803160 DOI: 10.1093/jrr/rrad082] [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] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 10/03/2023] [Indexed: 11/21/2023]
Abstract
For correct assessment of health risks after low-dose irradiation, calculation of radiation exposure estimates is crucial. To verify the calculated absorbed doses, instrumental methods of retrospective dosimetry are used. We compared calculated and instrumental-based estimates of external absorbed doses in the residents of Dolon, Mostik and Cheremushki villages, Kazakhstan, affected by the first nuclear weapon test performed at the Semipalatinsk Nuclear Test Site (SNTS) on August 29, 1949. The 'instrumental' doses were retrospectively estimated using the Luminescence Retrospective Dosimetry (LRD) and Electron Spin Resonance (ESR) methods. Correlation between the calculated individual cumulative external absorbed whole-body doses based on typical input data and ESR-based individual doses in the same people was strong (r = 0.782). It was even stronger between the calculated doses based on individual questionnaires' input data and the ESR-based doses (r = 0.940). Application of the LRD method is useful for validation of the calculated settlement-average cumulated external absorbed dose to air. Reconstruction of external exposure can be supplemented with the data from later measurements of soil contamination with long-lived radionuclides, such as, 137Cs. Our results show the reliability of the calculational method used for the retrospective assessment of individual external doses.
Collapse
Affiliation(s)
- Valeriy Stepanenko
- A. Tsyb Medical Radiological Research Centre - Branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, 4 Koroleva St., Obninsk, Kaluga Region, 2490036, Russian Federation
| | - Sergey Shinkarev
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, 46 Zhivopisnaya St., Moscow, 123098, Russian Federation
| | - Andrey Kaprin
- National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, 4 Koroleva St., Obninsk, Kaluga Region, 2490036, Russian Federation
- Peoples' Friendship University of Russia, 6 Miklukho-Maklaya St., Moscow, 117198, Russian Federation
- P.A. Hertzen Moscow Oncology Research Institute-branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, 2nd Botkinsky Drive 3, Moscow, 125284, Russian Federation
| | - Kazbek Apsalikov
- Scientific Research Institute of Radiation Medicine and Ecology of the non-commercial joint-stock company «Semey Medical University», 258 Gagarin St., Semey, 071407, Republic of Kazakhstan
| | - Sergey Ivanov
- A. Tsyb Medical Radiological Research Centre - Branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, 4 Koroleva St., Obninsk, Kaluga Region, 2490036, Russian Federation
- Peoples' Friendship University of Russia, 6 Miklukho-Maklaya St., Moscow, 117198, Russian Federation
| | - Peter Shegay
- National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, 4 Koroleva St., Obninsk, Kaluga Region, 2490036, Russian Federation
| | - Evgenia Ostroumova
- Environment and Lifestyle Epidemiology Branch, International Agency for Research on Cancer/WHO, 25 avenue Tony Garnier, Lyon, 69366, France
| | - Ausrele Kesminiene
- Environment and Lifestyle Epidemiology Branch, International Agency for Research on Cancer/WHO, 25 avenue Tony Garnier, Lyon, 69366, France
| | - Alexandra Lipikhina
- Scientific Research Institute of Radiation Medicine and Ecology of the non-commercial joint-stock company «Semey Medical University», 258 Gagarin St., Semey, 071407, Republic of Kazakhstan
| | - Viktoria Bogacheva
- A. Tsyb Medical Radiological Research Centre - Branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, 4 Koroleva St., Obninsk, Kaluga Region, 2490036, Russian Federation
| | - Kassym Zhumadilov
- L.N. Gumilyov Eurasian National University, 13 Munaitpasova St., office 300, Astana, 010008, Republic of Kazakhstan
| | - Masayoshi Yamamoto
- Low-Level Radioactivity Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Wakemachi O24, Nomi, Ishikawa, 923-1224, Japan
| | - Aya Sakaguchi
- Institute of Pure and Applied Sciences, University of Tsukuba 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan
| | - Satoru Endo
- Graduate School of Advanced Science and Engineering, Hiroshima University 1-4-1, Kagamiyama, Higashi, Hiroshima, 739-8527, Japan
| | - Nariaki Fujimoto
- Research Institute for Radiation Biology and Medicine, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8553, Japan
| | - Bernd Grosche
- Consultant, formerly: Federal Office for Radiation Protection, Germany, Grasmueckenweg 19, 85356 Freising, Germany
| | - Vladimir Iatsenko
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, 46 Zhivopisnaya St., Moscow, 123098, Russian Federation
| | - Alla Androsova
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, 46 Zhivopisnaya St., Moscow, 123098, Russian Federation
| | - Zukhra Apsalikova
- Scientific Research Institute of Radiation Medicine and Ecology of the non-commercial joint-stock company «Semey Medical University», 258 Gagarin St., Semey, 071407, Republic of Kazakhstan
| | - Noriyuki Kawano
- The Center for Peace, Hiroshima University Higashisenda-machi 1-1-89, Naka-ku, Hiroshima, 730-0053, Japan
| | - Masaharu Hoshi
- The Center for Peace, Hiroshima University Higashisenda-machi 1-1-89, Naka-ku, Hiroshima, 730-0053, Japan
| |
Collapse
|
3
|
Inoue K, Fujita Y, Kawano N, Hoshi M, Fukunaga T. Changes in the characteristics of suicide in Japan in the third year of the COVID-19 pandemic and the importance of continued suicide prevention measures. Med Sci Law 2024; 64:82-83. [PMID: 36987651 PMCID: PMC10064176 DOI: 10.1177/00258024231165432] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Affiliation(s)
- Ken Inoue
- Research and Education Faculty, Medical Sciences Cluster, Health Service Center, Kochi University, Kochi, Japan
| | | | - Noriyuki Kawano
- The Center for Peace, Hiroshima University, Hiroshima, Japan
| | - Masaharu Hoshi
- The Center for Peace, Hiroshima University, Hiroshima, Japan
| | | |
Collapse
|
4
|
Inoue K, Fujita Y, Kawano N, Fukunaga T. Creating a system to quickly determine cause of death, and efforts that should be made to elucidate the circumstances of suicides. Med Sci Law 2023; 63:339-340. [PMID: 36734115 DOI: 10.1177/00258024231154220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Affiliation(s)
- Ken Inoue
- Research and Education Faculty, Medical Sciences Cluster, Health Service Center, Kochi University, Kochi, Japan
| | | | - Noriyuki Kawano
- The Center for Peace, Hiroshima University, Hiroshima, Japan
| | | |
Collapse
|
5
|
Inoue K, Kawano N, Fujimoto N, Takeichi N, Hoshi M. The need for measures to prevent radiation exposure in Ukraine, taking both internal and external exposure into account. J Environ Radioact 2023; 266-267:107238. [PMID: 37413824 DOI: 10.1016/j.jenvrad.2023.107238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 06/27/2023] [Indexed: 07/08/2023]
Affiliation(s)
- Ken Inoue
- Research and Education Faculty, Medical Sciences Cluster, Health Service Center, Kochi University 2-5-1, Akebono-cho, Kochi-shi, Kochi, 780-8520, Japan; The Center for Peace, Hiroshima University 1-1-89, Higashisendamachi, Naka-ku, Hiroshima-shi, Hiroshima, 730-0053, Japan.
| | - Noriyuki Kawano
- The Center for Peace, Hiroshima University 1-1-89, Higashisendamachi, Naka-ku, Hiroshima-shi, Hiroshima, 730-0053, Japan.
| | - Nariaki Fujimoto
- Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima-shi, Hiroshima, 734-8553, Japan.
| | - Nobuo Takeichi
- Takeichi Clinic, 1-33, Nishikoujinmachi, Minami-ku, Hiroshima-shi, Hiroshima, 732-0806, Japan; Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima-shi, Hiroshima, 734-8553, Japan.
| | - Masaharu Hoshi
- The Center for Peace, Hiroshima University 1-1-89, Higashisendamachi, Naka-ku, Hiroshima-shi, Hiroshima, 730-0053, Japan.
| |
Collapse
|
6
|
Inoue K, Fujita Y, Fukunaga T, Kawano N. Specific measures to enhance suicide prevention in Japan. Med Sci Law 2023; 63:262-263. [PMID: 36437703 DOI: 10.1177/00258024221142660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Affiliation(s)
- Ken Inoue
- Research and Education Faculty, Medical Sciences Cluster, Health Service Center, Kochi University, Kochi, Japan
| | | | | | - Noriyuki Kawano
- The Center for Peace, Hiroshima University, Hiroshima, Japan
| |
Collapse
|
7
|
Inoue K, Fujita Y, Takeshita H, Kamura M, Kawano N. Discussion of the Urgent Problem of Young Carers in Japan. Asia Pac J Public Health 2023; 35:235-236. [PMID: 36658791 DOI: 10.1177/10105395231151290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Ken Inoue
- Research and Education Faculty, Medical Sciences Cluster, Health Service Center, Kochi University, Kochi, Japan
| | - Yasuyuki Fujita
- Faculty of Medicine, Shimane University, Shimane, Japan.,Department of Legal Medicine, Faculty of Medicine, Shimane University, Shimane, Japan
| | - Haruo Takeshita
- Department of Legal Medicine, Faculty of Medicine, Shimane University, Shimane, Japan
| | | | - Noriyuki Kawano
- The Center for Peace, Hiroshima University, Hiroshima, Japan
| |
Collapse
|
8
|
Stepanenko V, Sato H, Fujimoto N, Shichijo K, Toyoda S, Kawano N, Endo S, Kaprin A, Ivanov S, Shegay P, Petukhov A, Kolyzhenkov T, Bogacheva V, Chaizhunusova N, Shabdarbaeva D, Zhumadilov K, Hoshi M. External dose estimates of laboratory rats and mice during exposure to dispersed neutron-activated 56Mn powder. J Radiat Res 2022; 63:i16-i20. [PMID: 35968989 PMCID: PMC9377039 DOI: 10.1093/jrr/rrac032] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 04/13/2022] [Indexed: 06/01/2023]
Abstract
Estimates of external absorbed dose in experimental animals exposed to sprayed neutron-activated 56Mn powder are necessary for comparison with internal absorbed doses estimated under the same exposure conditions, which is required for a correct interpretation of the observed biological effects. It has been established that the measured dose of external absorbed dose as a result of gamma irradiation range 1-15 mGy, which is order of magnitude less than the maximal dose of internal gamma and beta irradiation of the whole body of the same experimental animals irradiated under the same conditions: according to the available literature data, the maximal values of absorbed dose of internal gamma-beta irradiation of the whole body are in the range of 330 mGy-1200 mGy for mice and 100 mGy-150 mGy for rats. It is concluded that under the conditions of experiments with dispersed neutron-activated powder 56MnO2, internal gamma-beta irradiation of experimental animals is the main factor of radiation exposure compared to external gamma irradiation.
Collapse
Affiliation(s)
- Valeriy Stepanenko
- Corresponding author. A. Tsyb Medical Radiological Research Center – Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation. Tel: +7 (8439) 97002;
| | - Hitoshi Sato
- Ibaraki Prefectural University of Health Sciences, 4669-2, Ami-machi, Inashiki-gun, Ibaraki 300-0394, Japan
| | - Nariaki Fujimoto
- Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima 734-8551, Japan
| | - Kazuko Shichijo
- Atomic Bomb Disease Institute, Nagasaki University, 1-12-4, Sakamoto, Nagasaki 852-8102, Japan
| | - Shin Toyoda
- Department of Applied Physics, Okayama University of Science, 1-1 Ridai, Kita-ku, Okayama 700-0005, Japan
| | - Noriyuki Kawano
- The Center for Peace, Hiroshima University, Higashisenda-machi 1-1-89, Naka-ku, Hiroshima 730-0053, Japan
| | - Satoru Endo
- Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi- Hiroshima 739-8527, Japan
| | - Andrey Kaprin
- National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | - Sergey Ivanov
- A. Tsyb Medical Radiological Research Center – Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | - Peter Shegay
- National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | - Alexey Petukhov
- A. Tsyb Medical Radiological Research Center – Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | - Timofey Kolyzhenkov
- A. Tsyb Medical Radiological Research Center – Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | - Victoria Bogacheva
- A. Tsyb Medical Radiological Research Center – Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | | | | | - Kassym Zhumadilov
- L.N. Gumilyov Eurasian National University, Munaipasova Str. 13, Nur Sultan 010008, Kazakhstan
| | - Masaharu Hoshi
- Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima 734-8551, Japan
| |
Collapse
|
9
|
Stepanenko V, Kaprin A, Ivanov S, Shegay P, Sato H, Toyoda S, Kawano N, Fujimoto N, Endo S, Bogacheva V, Kolyzhenkov T, Khailov A, Zhumadilov K, Zhumalina A, Yerimbetova D, Hoshi M. Estimation of 'dose-depth' profile in the surface layers of a quartz-containing tile from the former Hiroshima University building indicates the possible presence of beta-irradiation from residual radioactivity after A-bombing. J Radiat Res 2022; 63:i54-i60. [PMID: 35968988 PMCID: PMC9377027 DOI: 10.1093/jrr/rrac029] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 01/24/2022] [Indexed: 06/01/2023]
Abstract
The problem of differentiating between primary irradiation and exposure due to residual radioactivity following A-bombing (including beta-exposure), is the subject of special attention and discussions in order to understand the health effects following the Hiroshima and Nagasaki A-bombings, especially among newcomers to cities soon after the detonations. In this work, the method of single quartz grain luminescence retrospective dosimetry was applied for a retrospective estimation of the 'dose-depth' profile in a quartz-containing tile extracted from the building of former Hiroshima University (HU), which was a 'witness' of the Hiroshima atomic bombing on the 6 August 1945. It has been shown that results of retrospective estimates of the 'dose-depth' profile using the method of optically stimulated luminescence (OSL) from inclusions of quartz grains in very thin layers of the sample, in combination with the calculations of the 'dose-depth' profile using the Monte Carlo method, indicates the possible presence of beta irradiation of thin layers of the sample located near the surface of the tile facing the air, where there is no electronic equilibrium from gamma radiation.
Collapse
Affiliation(s)
- Valeriy Stepanenko
- Corresponding author. A. Tsyb Medical Radiological Research Center branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation, Tel.: +7 (8439) 97002, E-mail address:
| | - Andrey Kaprin
- National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | - Sergey Ivanov
- A. Tsyb Medical Radiological Research Center – Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | - Peter Shegay
- National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | - Hitoshi Sato
- Ibaraki Prefectural University of Health Sciences, 4669-2, Ami-chyo Ami, Inashiki-gun, Ibaraki 300-0394, Japan
| | - Shin Toyoda
- Department of Applied Physics, Okayama University of Science, 1-1 Ridai, Kita-ku, Okayama 700-0005, Japan
| | - Noriyuki Kawano
- The Center for Peace Hiroshima University, Higashisenda-machi 1-1-89, Naka-ku, Hiroshima 730-0053, Japan
| | - Nariaki Fujimoto
- Research Institute for Radiation Biology and Medicine Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima 734-8551, Japan
| | - Satoru Endo
- Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1, Kagamiyama, Higashi, Hiroshima 739-8527, Japan
| | - Viktoria Bogacheva
- A. Tsyb Medical Radiological Research Center – Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | - Timofey Kolyzhenkov
- A. Tsyb Medical Radiological Research Center – Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | - Artem Khailov
- A. Tsyb Medical Radiological Research Center – Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | - Kassym Zhumadilov
- L.N. Gumilyov Eurasian National University, Munaipasova Str. 13, Nur Sultan 010008, Kazakhstan
| | - Aidana Zhumalina
- L.N. Gumilyov Eurasian National University, Munaipasova Str. 13, Nur Sultan 010008, Kazakhstan
| | - Dana Yerimbetova
- L.N. Gumilyov Eurasian National University, Munaipasova Str. 13, Nur Sultan 010008, Kazakhstan
| | - Masaharu Hoshi
- Research Institute for Radiation Biology and Medicine Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima 734-8551, Japan
| |
Collapse
|
10
|
Stepanenko V, Kaprin A, Ivanov S, Shegay P, Bogacheva V, Sato H, Shichijo K, Toyoda S, Kawano N, Ohtaki M, Fujimoto N, Endo S, Chaizhunusova N, Shabdarbaeva D, Zhumadilov K, Hoshi M. Microdistribution of internal radiation dose in biological tissues exposed to 56Mn dioxide microparticles. J Radiat Res 2022; 63:i21-i25. [PMID: 35968986 PMCID: PMC9377032 DOI: 10.1093/jrr/rrac023] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 11/03/2021] [Revised: 04/10/2022] [Indexed: 06/01/2023]
Abstract
Manganese-56 (56Mn) was one of the dominant neutron-activated radionuclides during the first hours following the atomic-bombing of Hiroshima and Nagasaki. The radiation spectrum of 56Mn and the radiation emission from excited levels of 56Fe following 56Mn beta-decay include gamma-quanta, beta-particles, Auger electrons and X-rays. The dispersion of neutron activated 56Mn in the air can lead to entering of radioactive microparticles into the lungs. The investigation of spatial microdistribution of an internal dose in biological tissue exposed to 56Mn is an important matter with regards to the possible elevated irradiation of the lung alveoli and alveolar ducts. The Monte Carlo code (MCNP-4C) was used for the calculation of absorbed doses in biological tissue around 56Mn dioxide microparticles. The estimated absorbed dose has a very essential gradient in the epithelium cells of lung alveoli and alveolar duct: from 61 mGy/decay on the surface of simple squamous cells of epithelium to 0.15 mGy/decay at distance of 0.3 μm, which is maximal cell thickness. It has been concluded that epithelial cells of these pulmonary microstructures are selectively irradiated by low-energy electrons: short-range component of beta-particles spectrum and Auger electrons. The data obtained are important for the interpretation of biological experiments implementing dispersed neutron-activated 56Mn dioxide powder.
Collapse
Affiliation(s)
- Valeriy Stepanenko
- Corresponding author. A. Tsyb Medical Radiological Research Center – Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation, Tel.: +7 (8439) 97002, E-mail address:
| | - Andrey Kaprin
- National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | - Sergey Ivanov
- A. Tsyb Medical Radiological Research Center – Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | - Peter Shegay
- National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | - Viktoria Bogacheva
- A. Tsyb Medical Radiological Research Center – Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | - Hitoshi Sato
- Ibaraki Prefectural University of Health Sciences, 4669-2, Ami-chyo Ami, Inashiki-gun, Ibaraki 300-0394, Japan
| | - Kazuko Shichijo
- Atomic Bomb Disease Institute, Nagasaki University, 1-12-4, Sakamoto, Nagasaki 852-8523, Japan
| | - Shin Toyoda
- Department of Applied Physics, Okayama University of Science, 1-1 Ridai, Kita-ku, Okayama 700-0005, Japan
| | - Noriyuki Kawano
- The Center for Peace Hiroshima University, Higashisenda-machi 1-1-89, Naka-ku, Hiroshima 730-0053, Japan
| | - Megu Ohtaki
- Research Institute for Radiation Biology and Medicine Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima 734-8551, Japan
| | - Nariaki Fujimoto
- Research Institute for Radiation Biology and Medicine Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima 734-8551, Japan
| | - Satoru Endo
- Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1, Kagamiyama, Higashi, Hiroshima 739-8527, Japan
| | | | | | - Kassym Zhumadilov
- Eurasian National University named after L.N. Gumilyov, Munaipasova Str. 13, Astana 010008, Kazakhstan
| | - Masaharu Hoshi
- Research Institute for Radiation Biology and Medicine Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima 734-8551, Japan
| |
Collapse
|
11
|
Inoue K, Kameo S, Murayama Y, Takeichi N, Noso Y, Hoshi M, Kawano N, Takeshita H, Fujita Y. Suicides following an earthquake: Japanese proposals arising from post-earthquake analyses. Med Sci Law 2022; 62:158-159. [PMID: 34709077 DOI: 10.1177/00258024211049598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Affiliation(s)
- Ken Inoue
- Research and Education Faculty, Medical Sciences Cluster, Health Service Center, 12888Kochi University, Kochi, Japan
| | - Satomi Kameo
- Department of Public Health, 38357Gunma University Graduate School of Medicine, Gunma, Japan
- Department of Nutrition, College of Nutrition, Koshien University, Hyogo, Japan
| | - Yuri Murayama
- Department of Public Health, 38357Gunma University Graduate School of Medicine, Gunma, Japan
- Department of Psychiatry, Gunma University Hospital, Gunma, Japan
| | | | - Yoshihiro Noso
- Department of Health Services Management, 12799Hiroshima International University, Hiroshima, Japan
| | - Masaharu Hoshi
- The Center for Peace, 12803Hiroshima University, Hiroshima, Japan
| | - Noriyuki Kawano
- The Center for Peace, 12803Hiroshima University, Hiroshima, Japan
| | - Haruo Takeshita
- Department of Legal Medicine, Faculty of Medicine, Shimane University, Shimane, Japan
| | - Yasuyuki Fujita
- Department of Legal Medicine, Faculty of Medicine, Shimane University, Shimane, Japan
- Faculty of Medicine, and Department of Environmental Medicine and Public Health, 175764Faculty of Medicine, Shimane University, Shimane, Japan
| |
Collapse
|
12
|
Hashioka S, Inoue K, Otsuki K, Hayashida M, Wake R, Kawano N, Takeshita H, Inagaki M. Contribution of “Genuine Microglia” to Alzheimer's Disease Pathology. Front Aging Neurosci 2022; 14:815307. [PMID: 35401156 PMCID: PMC8989142 DOI: 10.3389/fnagi.2022.815307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 03/03/2022] [Indexed: 11/13/2022] Open
Affiliation(s)
- Sadayuki Hashioka
- Department of Psychiatry, Faculty of Medicine, Shimane University, Izumo, Japan
- *Correspondence: Sadayuki Hashioka
| | - Ken Inoue
- Medical Sciences Cluster, Health Service Center, Research and Education Faculty, Kochi University, Kochi, Japan
| | - Koji Otsuki
- Department of Psychiatry, Faculty of Medicine, Shimane University, Izumo, Japan
| | - Maiko Hayashida
- Department of Psychiatry, Faculty of Medicine, Shimane University, Izumo, Japan
| | - Rei Wake
- Department of Psychiatry, Faculty of Medicine, Shimane University, Izumo, Japan
| | - Noriyuki Kawano
- The Center for Peace, Hiroshima University, Hiroshima, Japan
| | - Haruo Takeshita
- Department of Legal Medicine, Faculty of Medicine, Shimane University, Izumo, Japan
| | - Masatoshi Inagaki
- Department of Psychiatry, Faculty of Medicine, Shimane University, Izumo, Japan
| |
Collapse
|
13
|
Inoue K, Murayama Y, Kawano N. Are Japanese actually taking leaves of absence? Ind Health 2022; 60:86-87. [PMID: 34615833 PMCID: PMC8825462 DOI: 10.2486/indhealth.2021-0093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 05/24/2021] [Indexed: 06/13/2023]
Affiliation(s)
- Ken Inoue
- Research and Education Faculty, Medical Sciences Cluster, and the Head of the Health Service Center, Kochi University, Japan
| | | | | |
Collapse
|
14
|
Inoue K, Kawano N, Takeichi N, Noso Y, Hoshi M. A combined scientific and public health approach is needed to evaluate the health impacts of internal exposure to radiation. Lancet Reg Health West Pac 2021; 15:100296. [PMID: 34708215 PMCID: PMC8524187 DOI: 10.1016/j.lanwpc.2021.100296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Accepted: 09/17/2021] [Indexed: 12/03/2022]
Affiliation(s)
- Ken Inoue
- Professor of Research and Education Faculty, Medical Sciences Cluster, and a head of Health Service Center, Kochi University, 2-5-1 Akebono-cho, Kochi-shi, Kochi 780-8520, Japan
| | - Noriyuki Kawano
- Professor and a head of The Center for Peace, Hiroshima University, 1-1-89, Higashisendamachi, Naka-ku, Hiroshima-shi, Hiroshima 730-0053, Japan
| | - Nobuo Takeichi
- Director of Takeichi Clinic and a visiting professor of Hiroshima University, 1-33, Nishikoujinmachi, Minami-ku, Hiroshima-shi, Hiroshima 732-0806, Japan
| | - Yoshihiro Noso
- Professor of Department of Health Services Management, Hiroshima International University, 555-36, Kurosegakuendai, Higashihiroshima-shi, Hiroshima 739-2695, Japan
| | - Masaharu Hoshi
- Emeritus professor of Hiroshima University, 1-1-89, Higashisendamachi, Naka-ku, Hiroshima-shi, Hiroshima 730-0053, Japan
| |
Collapse
|
15
|
Inoue K, Murayama Y, Kawano N. Potential Deaths of Personnel Involved in Measures to Deal With COVID-19 Due to Overwork as a Result of Current Working Patterns. Asia Pac J Public Health 2021; 34:314-315. [PMID: 34696625 DOI: 10.1177/10105395211053727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
16
|
Fujita Y, Inoue K, Kawano N, Noso Y, Chaizhunusova N, Ospanova N, Seksenbayev N, Moldagaliyev T, Tokesheva A, Zhunussov YT, Takeichi N, Hoshi M, Ohira Y. The need for detailed study of course credit earned and the comprehension of material by college students as a result of major changes in university course formats due to COVID-19 and actions based on those findings. Int Marit Health 2021; 72:245-246. [PMID: 34604999 DOI: 10.5603/imh.2021.0047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 05/24/2021] [Indexed: 11/25/2022] Open
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Nobuo Takeichi
- Hiroshima University, Hiroshima, Japan.,Takeichi Clinic, Hiroshima, Japan
| | | | - Yoshiyuki Ohira
- International University of Health and Welfare, School of Medicine, Chiba, Japan
| |
Collapse
|
17
|
Inoue K, Ohira Y, Kawano N, Takeshita H, Hashioka S. Seeking to address issues with COVID-19 vaccines in Japan and to resolve global problems with vaccination programmes. Int Marit Health 2021; 72:142. [PMID: 34212355 DOI: 10.5603/imh.2021.0024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 06/01/2021] [Indexed: 11/25/2022] Open
Affiliation(s)
| | - Yoshiyuki Ohira
- International University of Health and Welfare, School of Medicine, Chiba, Japan
| | | | | | | |
Collapse
|
18
|
Inoue K, Seksenbayev N, Chaizhunusova N, Moldagaliyev T, Ospanova N, Tokesheva S, Zhunussov YT, Takeichi N, Noso Y, Hoshi M, Kawano N. An Exploration of the Labor, Financial, and Economic Factors Related to Suicide in the Republic of Kazakhstan. Int J Environ Res Public Health 2021; 18:ijerph18136992. [PMID: 34208831 PMCID: PMC8297109 DOI: 10.3390/ijerph18136992] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/17/2021] [Accepted: 06/28/2021] [Indexed: 12/27/2022]
Abstract
The Republic of Kazakhstan has one of the world’s highest suicide rates. A detailed study of the risk factors for suicide in that country is therefore important. We investigated country-wide statistics related to labor, financial, and economic factors and whether any of these factors contribute to the risk of suicide in Kazakhstan. Using the 20 year period from 2000 to 2019, we examined the annual suicide rates overall (all citizens) and for males and females in Kazakhstan, annual unemployment rates, annual rates of increase in the country’s consumer price index, annual total exports, and annual total imports. We then calculated the correlations between the suicide rates and these four items. We also performed a multiple regression analysis of the relationship between the suicide rate and those four items. The results of these analyses indicated that the unemployment rate was the correlation coefficient most highly correlated with the suicide rate; unemployment was significantly related to suicide and should be targeted as a risk factor in suicide prevention interventions in Kazakhstan. With this in mind, organizations, government agencies, and professionals in relevant fields need to devise and implement suicide prevention measures.
Collapse
Affiliation(s)
- Ken Inoue
- Research and Education Faculty, Medical Sciences Cluster, Health Service Center, Kochi University, Kochi 780-8520, Japan
- The Center for Peace, Hiroshima University, Hiroshima 730-0053, Japan; (M.H.); (N.K.)
- Correspondence:
| | - Nursultan Seksenbayev
- Department of Psychiatry, Semey Medical University, Semey 071400, Kazakhstan; (N.S.); (T.M.); (N.O.)
| | - Nailya Chaizhunusova
- Department of Public Health, Semey Medical University, Semey 071400, Kazakhstan; (N.C.); (S.T.)
| | - Timur Moldagaliyev
- Department of Psychiatry, Semey Medical University, Semey 071400, Kazakhstan; (N.S.); (T.M.); (N.O.)
| | - Nargul Ospanova
- Department of Psychiatry, Semey Medical University, Semey 071400, Kazakhstan; (N.S.); (T.M.); (N.O.)
| | - Sholpan Tokesheva
- Department of Public Health, Semey Medical University, Semey 071400, Kazakhstan; (N.C.); (S.T.)
| | - Yersin T. Zhunussov
- Chairman of the Board-Rector, Semey Medical University, Semey 071400, Kazakhstan;
| | | | - Yoshihiro Noso
- Department of Health Services Management, Hiroshima International University, Hiroshima 739-2695, Japan;
| | - Masaharu Hoshi
- The Center for Peace, Hiroshima University, Hiroshima 730-0053, Japan; (M.H.); (N.K.)
| | - Noriyuki Kawano
- The Center for Peace, Hiroshima University, Hiroshima 730-0053, Japan; (M.H.); (N.K.)
| |
Collapse
|
19
|
Inoue K, Fujita Y, Kawano N. The need to devise government-spearheaded measures to prevent loneliness and isolation in conjunction with the spread of COVID-19 in Japan. Public Health 2021; 198:e3. [PMID: 34016460 PMCID: PMC8020074 DOI: 10.1016/j.puhe.2021.03.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 03/17/2021] [Indexed: 11/18/2022]
Affiliation(s)
- K Inoue
- Research and Education Faculty, Medical Sciences Cluster, Health Service Center, Kochi University, 2-5-1 Akebono-cho, Kochi-shi, Kochi 780-8520, Japan.
| | - Y Fujita
- Faculty of Medicine, Shimane University, 89-1, Enya-cho, Izumo, Shimane 693-8501, Japan.
| | - N Kawano
- The Center for Peace, Hiroshima University, 1-1-89, Higashisendamachi, Naka-ku, Hiroshima-shi, Hiroshima 730-0053, Japan.
| |
Collapse
|
20
|
Inoue K, Seksenbayev N, Moldagaliyev T, Noso Y, Takeichi N, Ohira Y, Sarsembina Z, Ospanova N, Kawano N, Takeshita H, Hoshi M. Adequate measures to prevent medical personnel from contracting COVID-19 should be promptly implemented: support from numerous agencies is needed. Int Marit Health 2020; 71:296. [DOI: 10.5603/imh.2020.0050] [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] [Received: 10/12/2020] [Accepted: 10/12/2020] [Indexed: 11/25/2022] Open
|
21
|
Stepanenko V, Kaprin A, Ivanov S, Shegay P, Zhumadilov K, Petukhov A, Kolyzhenkov T, Bogacheva V, Zharova E, Iaskova E, Chaizhunusova N, Shabdarbayeva D, Amantayeva G, Baurzhan A, Ruslanova B, Abishev Z, Apbassova M, Kairkhanova Y, Uzbekov D, Khismetova Z, Zhunussov Y, Fujimoto N, Sato H, Shichijo K, Nakashima M, Sakaguchi A, Toyoda S, Kawano N, Ohtaki M, Otani K, Endo S, Yamamoto M, Hoshi M. Internal doses in experimental mice and rats following exposure to neutron-activated 56MnO 2 powder: results of an international, multicenter study. Radiat Environ Biophys 2020; 59:683-692. [PMID: 32989569 PMCID: PMC7544755 DOI: 10.1007/s00411-020-00870-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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: 03/21/2020] [Accepted: 08/31/2020] [Indexed: 05/02/2023]
Abstract
The experiment was performed in support of a Japanese initiative to investigate the biological effects of irradiation from residual neutron-activated radioactivity that resulted from the A-bombing. Radionuclide 56Mn (T1/2 = 2.58 h) is one of the main neutron-activated emitters during the first hours after neutron activation of soil dust particles. In our previous studies (2016-2017) related to irradiation of male Wistar rats after dispersion of 56MnO2 powder, the internal doses in rats were found to be very inhomogeneous: distribution of doses among different organs ranged from 1.3 Gy in small intestine to less than 0.0015 Gy in some of the other organs. Internal doses in the lungs ranged from 0.03 to 0.1 Gy. The essential pathological changes were found in lung tissue of rats despite a low level of irradiation. In the present study, the dosimetry investigations were extended: internal doses in experimental mice and rats were estimated for various activity levels of dispersed neutron-activated 56MnO2 powder. The following findings were noted: (a) internal radiation doses in mice were several times higher in comparison with rats under similar conditions of exposure to 56MnO2 powder. (b) When 2.74 × 108 Bq of 56MnO2 powder was dispersed over mice, doses of internal irradiation ranged from 0.81 to 4.5 Gy in the gastrointestinal tract (small intestine, stomach, large intestine), from 0.096 to 0.14 Gy in lungs, and doses in skin and eyes ranged from 0.29 to 0.42 Gy and from 0.12 to 0.16 Gy, respectively. Internal radiation doses in other organs of mice were much lower. (c) Internal radiation doses were significantly lower in organs of rats with the same activity of exposure to 56MnO2 powder (2.74 × 108 Bq): 0.09, 0.17, 0.29, and 0.025 Gy in stomach, small intestine, large intestine, and lungs, respectively. (d) Doses of internal irradiation in organs of rats and mice were two to four times higher when they were exposed to 8.0 × 108 Bq of 56MnO2 (in comparison with exposure to 2.74 × 108 Bq of 56MnO2). (e) Internal radiation doses in organs of mice were 7-14 times lower with the lowest 56MnO2 amount (8.0 × 107 Bq) in comparison with the highest amount, 8.0 × 108 Bq, of dispersed 56MnO2 powder. The data obtained will be used for interpretation of biological effects in experimental mice and rats that result from dispersion of various levels of neutron-activated 56MnO2 powder, which is the subject of separate studies.
Collapse
Affiliation(s)
- Valeriy Stepanenko
- Medical Radiological Research Center named after A.F. Tsyb-branch of "National Medical Research Center of Radiology" Ministry of Health of the Russian Federation, Koroleva Str. 4, Obninsk, 249036, Kaluga, Russian Federation.
| | - Andrey Kaprin
- National Medical Research Center of Radiology, Ministry of Health of the Russian Federation, Koroleva Str. 4, Obninsk, 249036, Kaluga, Russian Federation
| | - Sergey Ivanov
- Medical Radiological Research Center named after A.F. Tsyb-branch of "National Medical Research Center of Radiology" Ministry of Health of the Russian Federation, Koroleva Str. 4, Obninsk, 249036, Kaluga, Russian Federation
| | - Peter Shegay
- National Medical Research Center of Radiology, Ministry of Health of the Russian Federation, Koroleva Str. 4, Obninsk, 249036, Kaluga, Russian Federation
| | - Kassym Zhumadilov
- Eurasian National University named after L.N. Gumilyov, Astana, 2 Satpayev Str., Nur-Sultan, 010000, Republic of Kazakhstan
| | - Aleksey Petukhov
- Medical Radiological Research Center named after A.F. Tsyb-branch of "National Medical Research Center of Radiology" Ministry of Health of the Russian Federation, Koroleva Str. 4, Obninsk, 249036, Kaluga, Russian Federation
| | - Timofey Kolyzhenkov
- Medical Radiological Research Center named after A.F. Tsyb-branch of "National Medical Research Center of Radiology" Ministry of Health of the Russian Federation, Koroleva Str. 4, Obninsk, 249036, Kaluga, Russian Federation
| | - Viktoria Bogacheva
- Medical Radiological Research Center named after A.F. Tsyb-branch of "National Medical Research Center of Radiology" Ministry of Health of the Russian Federation, Koroleva Str. 4, Obninsk, 249036, Kaluga, Russian Federation
| | - Elena Zharova
- National Medical Research Center of Radiology, Ministry of Health of the Russian Federation, Koroleva Str. 4, Obninsk, 249036, Kaluga, Russian Federation
| | - Elena Iaskova
- Medical Radiological Research Center named after A.F. Tsyb-branch of "National Medical Research Center of Radiology" Ministry of Health of the Russian Federation, Koroleva Str. 4, Obninsk, 249036, Kaluga, Russian Federation
| | | | | | - Gaukhar Amantayeva
- Semey Medical University, 103 Abay Str., Semey, 071400, Republic of Kazakhstan
| | - Arailym Baurzhan
- Semey Medical University, 103 Abay Str., Semey, 071400, Republic of Kazakhstan
| | - Bakhyt Ruslanova
- Semey Medical University, 103 Abay Str., Semey, 071400, Republic of Kazakhstan
| | - Zhaslan Abishev
- Semey Medical University, 103 Abay Str., Semey, 071400, Republic of Kazakhstan
| | - Madina Apbassova
- Semey Medical University, 103 Abay Str., Semey, 071400, Republic of Kazakhstan
| | - Ynkar Kairkhanova
- Semey Medical University, 103 Abay Str., Semey, 071400, Republic of Kazakhstan
| | - Darkhan Uzbekov
- Semey Medical University, 103 Abay Str., Semey, 071400, Republic of Kazakhstan
| | - Zaituna Khismetova
- Semey Medical University, 103 Abay Str., Semey, 071400, Republic of Kazakhstan
| | - Yersin Zhunussov
- Semey Medical University, 103 Abay Str., Semey, 071400, Republic of Kazakhstan
| | - Nariaki Fujimoto
- Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
| | - Hitoshi Sato
- Ibaraki Prefectural University of Health Sciences, 4669-2 Ami-chyo Ami, Inashiki-gun, Ibaraki, 300-0394, Japan
| | - Kazuko Shichijo
- Atomic Bomb Disease, Institute, Nagasaki University, 1-12-4, Sakamoto, Nagasaki, 852-8102, Japan
| | - Masahiro Nakashima
- Atomic Bomb Disease, Institute, Nagasaki University, 1-12-4, Sakamoto, Nagasaki, 852-8102, Japan
| | - Aya Sakaguchi
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1, Tsukuba-shi Tennodai, Ibaraki, 305-8571, Japan
| | - Shin Toyoda
- Department of Applied Physics, Okayama University of Science, 1-1 Ridai, Kita-ku, Okayama, 700-0005, Japan
| | - Noriyuki Kawano
- The Center for Peace, Hiroshima University, Higashisenda-machi 1-1-89, Naka-ku, Hiroshima, 730-0053, Japan
| | - Megu Ohtaki
- Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
| | - Keiko Otani
- The Center for Peace, Hiroshima University, Higashisenda-machi 1-1-89, Naka-ku, Hiroshima, 730-0053, Japan
| | - Satoru Endo
- Graduate School of Engineering, Hiroshima University, 1-4-1, Kagamiyama, Higashi, Hiroshima, 739-8527, Japan
| | - Masayoshi Yamamoto
- Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-Cho, Kanazawa, 920-1192, Japan
| | - Masaharu Hoshi
- The Center for Peace, Hiroshima University, Higashisenda-machi 1-1-89, Naka-ku, Hiroshima, 730-0053, Japan
| |
Collapse
|
22
|
Inoue K, Hashioka S, Kawano N. Risk of an Increase in Suicide Rates Associated With Economic Downturn due to COVID-19 Pandemic. Asia Pac J Public Health 2020; 32:367. [PMID: 32639165 DOI: 10.1177/1010539520940893] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
23
|
Chaizhunusova N, Madiyeva M, Tanaka K, Hoshi M, Kawano N, Noso Y, Takeichi N, Rakhypbekov T, Urazalina N, Dovgal G, Rymbaeva T, Tokanova S, Beisengazina M, Kembayeva K, Inoue K. Cytogenetic abnormalities of the descendants of permanent residents of heavily contaminated East Kazakhstan. Radiat Environ Biophys 2017; 56:337-343. [PMID: 28993937 DOI: 10.1007/s00411-017-0717-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 09/18/2017] [Indexed: 06/07/2023]
Abstract
More than 400 nuclear explosion tests were conducted at the Semipalatinsk Nuclear Test Site (SNTS) and significant radioactive substances were released. The long-term consequences of the activities at the SNTS and the appearance of any hereditary effects remain insufficiently studied about 25 years after the test site was closed. The population living in villages near the SNTS are considered to have been heavily exposed to external and internal radiation. This study aims to perform an assessment and comprehensive cytogenetic analysis of the inhabitants living near the SNTS, and their first-(F1) and second-(F2) generation children. Residents of the East Kazakhstan region living in the area covered by the former SNTS were included in the study. To evaluate the hereditary effects of nuclear testing, comprehensive chromosome analyses were performed in lymphocytes using conventional Giemsa and fluorescent in situ hybridization methods in 115 F1 and F2 descendants in the villages of Dolon and Sarzhal, which were heavily contaminated. The parents of the subjects had permanently lived in the villages. A higher number of stable-type chromosome aberrations such as translocations was found in these residents than in 80 residents of the control area, Kokpecty, which indicates the possibility that radiation had biological effects on the exposed subjects.
Collapse
Affiliation(s)
- Nailya Chaizhunusova
- Department of Nutrition and Hygienic Disciplines, Semey State Medical University, Abay st. 103, Semey, 071400, Kazakhstan
| | - Madina Madiyeva
- Department of Oncology and Visual Diagnostic, Semey State Medical University, Abay st. 103, Semey, 071400, Kazakhstan
| | - Kimio Tanaka
- Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima, 734-8553, Japan
| | | | | | - Yoshihiro Noso
- Department of General Medicine, Faculty of Medicine, Shimane University, Shimane, 693-8501, Japan
| | - Nobuo Takeichi
- Department of General Medicine, Faculty of Medicine, Shimane University, Shimane, 693-8501, Japan
- Takeichi Clinic, Hiroshima, 732-0806, Japan
| | - Tolebay Rakhypbekov
- Department of Nutrition and Hygienic Disciplines, Semey State Medical University, Abay st. 103, Semey, 071400, Kazakhstan
| | - Nailya Urazalina
- Department of Nutrition and Hygienic Disciplines, Semey State Medical University, Abay st. 103, Semey, 071400, Kazakhstan
| | - Galina Dovgal
- Department of Nutrition and Hygienic Disciplines, Semey State Medical University, Abay st. 103, Semey, 071400, Kazakhstan
| | - Tamara Rymbaeva
- Department of Oncology and Visual Diagnostic, Semey State Medical University, Abay st. 103, Semey, 071400, Kazakhstan
| | - Sholpan Tokanova
- Department of Nutrition and Hygienic Disciplines, Semey State Medical University, Abay st. 103, Semey, 071400, Kazakhstan
| | - Meruert Beisengazina
- Department of Nutrition and Hygienic Disciplines, Semey State Medical University, Abay st. 103, Semey, 071400, Kazakhstan
| | - Kulypash Kembayeva
- Department of Nutrition and Hygienic Disciplines, Semey State Medical University, Abay st. 103, Semey, 071400, Kazakhstan
| | - Ken Inoue
- Health Service Center, Kochi University, 2-5-1, Akebono-cho, Kochi-shi, Kochi, 780-8520, Japan.
| |
Collapse
|
24
|
Kawano N, Iwamoto K, Ozaki N. DRIVING-RELATED RISKS AND MOBILITY IN ELDERLY DRIVERS WITH MCI. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.4350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- N. Kawano
- Institutes of Innovation for Future Society, Nagoya University, Nagoya, Japan,
- Department of Psychiatry, Nagoya University, Nagoya, Japan
| | - K. Iwamoto
- Department of Psychiatry, Nagoya University, Nagoya, Japan
| | - N. Ozaki
- Department of Psychiatry, Nagoya University, Nagoya, Japan
| |
Collapse
|
25
|
Stepanenko V, Rakhypbekov T, Otani K, Endo S, Satoh K, Kawano N, Shichijo K, Nakashima M, Takatsuji T, Sakaguchi A, Kato H, Onda Y, Fujimoto N, Toyoda S, Sato H, Dyussupov A, Chaizhunusova N, Sayakenov N, Uzbekov D, Saimova A, Shabdarbaeva D, Skakov M, Vurim A, Gnyrya V, Azimkhanov A, Kolbayenkov A, Zhumadilov K, Kairikhanova Y, Kaprin A, Galkin V, Ivanov S, Kolyzhenkov T, Petukhov A, Yaskova E, Belukha I, Khailov A, Skvortsov V, Ivannikov A, Akhmedova U, Bogacheva V, Hoshi M. Internal exposure to neutron-activated 56Mn dioxide powder in Wistar rats: part 1: dosimetry. Radiat Environ Biophys 2017; 56:47-54. [PMID: 28188481 DOI: 10.1007/s00411-016-0678-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 12/23/2016] [Indexed: 06/06/2023]
Abstract
There were two sources of ionizing irradiation after the atomic bombings of Hiroshima and Nagasaki: (1) initial gamma-neutron irradiation at the moment of detonation and (2) residual radioactivity. Residual radioactivity consisted of two components: radioactive fallout containing fission products, including radioactive fissile materials from nuclear device, and neutron-activated radioisotopes from materials on the ground. The dosimetry systems DS86 and DS02 were mainly devoted to the assessment of initial radiation exposure to neutrons and gamma rays, while only brief considerations were given for the estimation of doses caused by residual radiation exposure. Currently, estimation of internal exposure of atomic bomb survivors due to dispersed radioactivity and neutron-activated radioisotopes from materials on the ground is a matter of some interest, in Japan. The main neutron-activated radionuclides in soil dust were 24Na, 28Al, 31Si, 32P, 38Cl, 42K, 45Ca, 46Sc, 56Mn, 59Fe, 60Co, and 134Cs. The radionuclide 56Mn (T 1/2 = 2.58 h) is known as one of the dominant beta- and gamma emitters during the first few hours after neutron irradiation of soil and other materials on ground, dispersed in the form of dust after a nuclear explosion in the atmosphere. To investigate the peculiarities of biological effects of internal exposure to 56Mn in comparison with external gamma irradiation, a dedicated experiment with Wistar rats exposed to neutron-activated 56Mn dioxide powder was performed recently by Shichijo and coworkers. The dosimetry required for this experiment is described here. Assessment of internal radiation doses was performed on the basis of measured 56Mn activity in the organs and tissues of the rats and of absorbed fractions of internal exposure to photons and electrons calculated with the MCNP-4C Monte Carlo using a mathematical rat phantom. The first results of this international multicenter study show that the internal irradiation due to incorporated 56Mn powder is highly inhomogeneous, and that the most irradiated organs of the experimental animals are: large intestine, small intestine, stomach, and lungs. Accumulated absorbed organ doses were 1.65, 1.33, 0.24, 0.10 Gy for large intestine, small intestine, stomach, and lungs, respectively. Other organs were irradiated at lower dose levels. These results will be useful for interpretation of the biological effects of internal exposure of experimental rats to powdered 56Mn as observed by Shichijo and coworkers.
Collapse
Affiliation(s)
- Valeriy Stepanenko
- Medical Radiological Research Center (MRRC) named after A.F. Tsyb - National Medical Research Radiological Center of the Health Ministry of the Russian Federation, Koroliova Str. 4, Obninsk, Kaluga Region, 249036, Russian Federation.
| | - Tolebay Rakhypbekov
- Semey State Medical University, Kazakhstan, Abay Str., 103, Semey, 071400, Republic of Kazakhstan
| | - Keiko Otani
- Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
| | - Satoru Endo
- Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
| | - Kenichi Satoh
- Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
| | - Noriyuki Kawano
- Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
| | - Kazuko Shichijo
- Nagasaki University, 1-12-4, Sakamoto, Nagasaki, 852-8102, Japan
| | | | | | - Aya Sakaguchi
- University of Tsukuba, 1-1-1, Tsukuba-shi Tennodai, Ibaraki, 305-8571, Japan
| | - Hiroaki Kato
- University of Tsukuba, 1-1-1, Tsukuba-shi Tennodai, Ibaraki, 305-8571, Japan
| | - Yuichi Onda
- University of Tsukuba, 1-1-1, Tsukuba-shi Tennodai, Ibaraki, 305-8571, Japan
| | - Nariaki Fujimoto
- Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
| | - Shin Toyoda
- Okayama University of Science, 1-1, Kitaku Ridai-cho, Kita-ku, Okayama, 700-0005, Japan
| | - Hitoshi Sato
- Ibaraki Prefectural University of Health Science, 4669-2, Ami-chyo Ami, Inashiki-gun, Ibaraki, Japan
| | - Altay Dyussupov
- Semey State Medical University, Kazakhstan, Abay Str., 103, Semey, 071400, Republic of Kazakhstan
| | - Nailya Chaizhunusova
- Semey State Medical University, Kazakhstan, Abay Str., 103, Semey, 071400, Republic of Kazakhstan
| | - Nurlan Sayakenov
- Semey State Medical University, Kazakhstan, Abay Str., 103, Semey, 071400, Republic of Kazakhstan
| | - Darkhan Uzbekov
- Semey State Medical University, Kazakhstan, Abay Str., 103, Semey, 071400, Republic of Kazakhstan
| | - Aisulu Saimova
- Semey State Medical University, Kazakhstan, Abay Str., 103, Semey, 071400, Republic of Kazakhstan
| | - Dariya Shabdarbaeva
- Semey State Medical University, Kazakhstan, Abay Str., 103, Semey, 071400, Republic of Kazakhstan
| | - Mazhin Skakov
- National Nuclear Center of the Republic of Kazakhstan, Krasnoarmeyskaya Str., 2, Build 54 B, 071100, Kurchatov, Republic of Kazakhstan
| | - Alexandr Vurim
- National Nuclear Center of the Republic of Kazakhstan, Krasnoarmeyskaya Str., 2, Build 54 B, 071100, Kurchatov, Republic of Kazakhstan
| | - Vyacheslav Gnyrya
- National Nuclear Center of the Republic of Kazakhstan, Krasnoarmeyskaya Str., 2, Build 54 B, 071100, Kurchatov, Republic of Kazakhstan
| | - Almas Azimkhanov
- National Nuclear Center of the Republic of Kazakhstan, Krasnoarmeyskaya Str., 2, Build 54 B, 071100, Kurchatov, Republic of Kazakhstan
| | - Alexander Kolbayenkov
- National Nuclear Center of the Republic of Kazakhstan, Krasnoarmeyskaya Str., 2, Build 54 B, 071100, Kurchatov, Republic of Kazakhstan
| | - Kasym Zhumadilov
- Eurasian National University named after L.N. Gumilyov, Munaipasova Str. 13, Astana, 010008, Republic of Kazakhstan
| | - Yankar Kairikhanova
- Semey State Medical University, Kazakhstan, Abay Str., 103, Semey, 071400, Republic of Kazakhstan
| | - Andrey Kaprin
- Medical Radiological Research Center (MRRC) named after A.F. Tsyb - National Medical Research Radiological Center of the Health Ministry of the Russian Federation, Koroliova Str. 4, Obninsk, Kaluga Region, 249036, Russian Federation
| | - Vsevolod Galkin
- Medical Radiological Research Center (MRRC) named after A.F. Tsyb - National Medical Research Radiological Center of the Health Ministry of the Russian Federation, Koroliova Str. 4, Obninsk, Kaluga Region, 249036, Russian Federation
| | - Sergey Ivanov
- Medical Radiological Research Center (MRRC) named after A.F. Tsyb - National Medical Research Radiological Center of the Health Ministry of the Russian Federation, Koroliova Str. 4, Obninsk, Kaluga Region, 249036, Russian Federation
| | - Timofey Kolyzhenkov
- Medical Radiological Research Center (MRRC) named after A.F. Tsyb - National Medical Research Radiological Center of the Health Ministry of the Russian Federation, Koroliova Str. 4, Obninsk, Kaluga Region, 249036, Russian Federation
| | - Aleksey Petukhov
- Medical Radiological Research Center (MRRC) named after A.F. Tsyb - National Medical Research Radiological Center of the Health Ministry of the Russian Federation, Koroliova Str. 4, Obninsk, Kaluga Region, 249036, Russian Federation
| | - Elena Yaskova
- Medical Radiological Research Center (MRRC) named after A.F. Tsyb - National Medical Research Radiological Center of the Health Ministry of the Russian Federation, Koroliova Str. 4, Obninsk, Kaluga Region, 249036, Russian Federation
| | - Irina Belukha
- Medical Radiological Research Center (MRRC) named after A.F. Tsyb - National Medical Research Radiological Center of the Health Ministry of the Russian Federation, Koroliova Str. 4, Obninsk, Kaluga Region, 249036, Russian Federation
| | - Artem Khailov
- Medical Radiological Research Center (MRRC) named after A.F. Tsyb - National Medical Research Radiological Center of the Health Ministry of the Russian Federation, Koroliova Str. 4, Obninsk, Kaluga Region, 249036, Russian Federation
| | - Valeriy Skvortsov
- Medical Radiological Research Center (MRRC) named after A.F. Tsyb - National Medical Research Radiological Center of the Health Ministry of the Russian Federation, Koroliova Str. 4, Obninsk, Kaluga Region, 249036, Russian Federation
| | - Alexander Ivannikov
- Medical Radiological Research Center (MRRC) named after A.F. Tsyb - National Medical Research Radiological Center of the Health Ministry of the Russian Federation, Koroliova Str. 4, Obninsk, Kaluga Region, 249036, Russian Federation
| | - Umukusum Akhmedova
- Medical Radiological Research Center (MRRC) named after A.F. Tsyb - National Medical Research Radiological Center of the Health Ministry of the Russian Federation, Koroliova Str. 4, Obninsk, Kaluga Region, 249036, Russian Federation
| | - Viktoria Bogacheva
- Medical Radiological Research Center (MRRC) named after A.F. Tsyb - National Medical Research Radiological Center of the Health Ministry of the Russian Federation, Koroliova Str. 4, Obninsk, Kaluga Region, 249036, Russian Federation
| | - Masaharu Hoshi
- Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
| |
Collapse
|
26
|
Akiyama H, Nose M, Ohtsuki N, Hisaka S, Takiguchi H, Tada A, Sugimoto N, Fuchino H, Inui T, Kawano N, Hayashi S, Hishida A, Kudo T, Sugiyama K, Abe Y, Mutsuga M, Kawahara N, Yoshimatsu K. Evaluation of the safety and efficacy of Glycyrrhiza uralensis root extracts produced using artificial hydroponic and artificial hydroponic-field hybrid cultivation systems. J Nat Med 2016; 71:265-271. [PMID: 27848205 DOI: 10.1007/s11418-016-1058-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [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: 05/24/2016] [Accepted: 10/24/2016] [Indexed: 11/25/2022]
Abstract
Glycyrrhiza uralensis roots used in this study were produced using novel cultivation systems, including artificial hydroponics and artificial hydroponic-field hybrid cultivation. The equivalency between G. uralensis root extracts produced by hydroponics and/or hybrid cultivation and a commercial Glycyrrhiza crude drug were evaluated for both safety and efficacy, and there were no significant differences in terms of mutagenicity on the Ames tests. The levels of cadmium and mercury in both hydroponic roots and crude drugs were less than the limit of quantitation. Arsenic levels were lower in all hydroponic roots than in the crude drug, whereas mean lead levels in the crude drug were not significantly different from those in the hydroponically cultivated G. uralensis roots. Both hydroponic and hybrid-cultivated root extracts showed antiallergic activities against contact hypersensitivity that were similar to those of the crude drug extracts. These study results suggest that hydroponic and hybrid-cultivated roots are equivalent in safety and efficacy to those of commercial crude drugs. Further studies are necessary before the roots are applicable as replacements for the currently available commercial crude drugs produced from wild plant resources.
Collapse
Affiliation(s)
- H Akiyama
- National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo, 158-8501, Japan.
| | - M Nose
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku, Nagoya, 468-8503, Japan
| | - N Ohtsuki
- National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo, 158-8501, Japan
| | - S Hisaka
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku, Nagoya, 468-8503, Japan
| | - H Takiguchi
- National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo, 158-8501, Japan
| | - A Tada
- National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo, 158-8501, Japan
| | - N Sugimoto
- National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo, 158-8501, Japan
| | - H Fuchino
- Tsukuba Division, Research Center for Medicinal Plant Resources, National Institutes of Biomedical Innovation, Health and Nutrition, 1-2 Hachimandai, Tsukuba, Ibaraki, 303-0843, Japan
| | - T Inui
- Tsukuba Division, Research Center for Medicinal Plant Resources, National Institutes of Biomedical Innovation, Health and Nutrition, 1-2 Hachimandai, Tsukuba, Ibaraki, 303-0843, Japan
| | - N Kawano
- Tsukuba Division, Research Center for Medicinal Plant Resources, National Institutes of Biomedical Innovation, Health and Nutrition, 1-2 Hachimandai, Tsukuba, Ibaraki, 303-0843, Japan
| | - S Hayashi
- Hokkaido Division, Research Center for Medicinal Plant Resources, National Institutes of Biomedical Innovation, Health and Nutrition, 108-4 Aza Ohashi, Nayoro, Hokkaido, 096-0065, Japan
| | - A Hishida
- Hokkaido Division, Research Center for Medicinal Plant Resources, National Institutes of Biomedical Innovation, Health and Nutrition, 108-4 Aza Ohashi, Nayoro, Hokkaido, 096-0065, Japan
| | - T Kudo
- Kajima Technical Research Institute, Kajima Corporation, 19-1, Tobitakyu 2-chome, Chofushi, Tokyo, 182-0036, Japan
| | - K Sugiyama
- National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo, 158-8501, Japan
| | - Y Abe
- National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo, 158-8501, Japan
| | - M Mutsuga
- National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo, 158-8501, Japan
| | - N Kawahara
- Tsukuba Division, Research Center for Medicinal Plant Resources, National Institutes of Biomedical Innovation, Health and Nutrition, 1-2 Hachimandai, Tsukuba, Ibaraki, 303-0843, Japan
| | - K Yoshimatsu
- Tsukuba Division, Research Center for Medicinal Plant Resources, National Institutes of Biomedical Innovation, Health and Nutrition, 1-2 Hachimandai, Tsukuba, Ibaraki, 303-0843, Japan
| |
Collapse
|
27
|
Abstract
To determine whether Ki-67 (MIB-1) and p53 have prognostic value in ependymomas, clinicopathologic study was undertaken in 29 patients with this tumor. The clinical course correlated well with the histological grade according to the World Health Organization (WHO) grading system, and it was the worst in patients with anaplastic ependymoma. The percent expression of MIB-1 and p53 correlated with the histological grade of malignancy. With regard to the subtypes of benign ependymoma, the clinical course was the worst in clear-cell ependymoma, which had a significantly higher expression of MIB-1 and p53 than the other subtypes. Tanycytic ependymoma showed the most benign clinical course and the lowest expression of MIB-1 and p53. Although the WHO grading generally tended to correlate with the clinical course of ependymomas, these two subtypes--clear-cell ependymoma and tanycytic ependymoma--exhibited biological properties different from those of other grade II ependymomas.
Collapse
Affiliation(s)
- S Suzuki
- Department of Neurosurgery, Kitasato University School of Medicine, Kanagawa, Japan
| | | | | | | | | | | |
Collapse
|
28
|
Imanaka T, Endo S, Kawano N, Tanaka K. Radiation exposure and disease questionnaires of early entrants after the Hiroshima bombing. Radiat Prot Dosimetry 2012; 149:91-96. [PMID: 21914640 DOI: 10.1093/rpd/ncr370] [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: 05/31/2023]
Abstract
It is popularly known that people who entered into the ground-zero area shortly after the atomic bombings in Hiroshima and Nagasaki suffered from various syndromes similar to acute radiation effects. External exposures from neutron-induced radionuclides in soil have recently been reassessed based on DS02 calculations as functions of both distance from the hypocentres and elapsed time after the explosions. Significant exposure due to induced radiation can be determined for those who entered the area within 1000 m from the hypocentres shortly after the bombing. Although it was impossible to track the action of each of the survivors over the days or weeks following the bombings in order to make reliable dose estimates for their exposures to soil activation or fallout, four individuals among those early entrants were investigated here to describe useful information of what happened shortly after the bombing.
Collapse
Affiliation(s)
- Tetsuji Imanaka
- Research Reactor Institute, Kyoto University, Kumatori-cho, Osaka 590-0494, Japan.
| | | | | | | |
Collapse
|
29
|
Matsumoto K, Goossens S, Ishihara Y, Liu Q, Kikuchi F, Iwata T, Namiki N, Noda H, Hanada H, Kawano N, Lemoine FG, Rowlands DD. An improved lunar gravity field model from SELENE and historical tracking data: Revealing the farside gravity features. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009je003499] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
30
|
Kawano N, Ito J, Kashiwazaki N, Yoshida M. Phosphorylation of the MAPK Pathway has an Essential Role in the Acrosome Reaction in Miniature Pig Sperm. Reprod Domest Anim 2010; 45:263-8. [DOI: 10.1111/j.1439-0531.2008.01279.x] [Citation(s) in RCA: 5] [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: 11/29/2022]
|
31
|
Araki H, Tazawa S, Noda H, Ishihara Y, Goossens S, Sasaki S, Kawano N, Kamiya I, Otake H, Oberst J, Shum C. Lunar Global Shape and Polar Topography Derived from Kaguya-LALT Laser Altimetry. Science 2009; 323:897-900. [DOI: 10.1126/science.1164146] [Citation(s) in RCA: 216] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
|
32
|
Abstract
Spermatozoa generated in the testis are immature and incompetent for fertilization. During their journey toward the egg, the sperm acquire fertility and achieving fertilization. These sperm modifications to ensure fertilization are induced by many female or male extra-sperm factors: for example, sperm motility-activating factors from the egg jelly, sperm attractants from the eggs, and decapacitation factors from the seminal plasma. The factors controlling sperm fertility are myriad and species specific; they may be peptides, sugar chains, or small organic compounds. Nevertheless, the fundamental mechanisms underlying fertilization must be common among all animals; increase in [Ca(2+)](i) triggers all the steps in the process of fertilization, and cAMP plays important roles in many steps. Elucidating the dynamic functional and morphological changes in sperm cells is important for understanding the regulation of fertilization. Here, we introduce the diversity and generality of the control of sperm fertility.
Collapse
Affiliation(s)
- M Yoshida
- Misaki Marine Biological Station, Graduate School of Science, University of Tokyo, Miura, Kanagawa, Japan.
| | | | | |
Collapse
|
33
|
Yokoyama K, Ishikawa N, Igarashi S, Kawano N, Masuda N, Hamaguchi W, Yamasaki S, Koganemaru Y, Hattori K, Miyazaki T, Ogino SI, Matsumoto Y, Takeuchi M, Ohta M. Potent and orally bioavailable CCR4 antagonists: Synthesis and structure-activity relationship study of 2-aminoquinazolines. Bioorg Med Chem 2008; 17:64-73. [PMID: 19081254 DOI: 10.1016/j.bmc.2008.11.020] [Citation(s) in RCA: 25] [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] [Received: 09/16/2008] [Revised: 11/07/2008] [Accepted: 11/08/2008] [Indexed: 12/01/2022]
Abstract
Starting with a series of CC chemokine receptor-4 (CCR4) antagonists developed in a previous study, the potency was improved by replacing the pyrrolidine moiety of N-(4-chlorophenyl)-6,7-dimethoxy-2-(4-pyrrolidin-1-ylpiperidin-1-yl)quinazolin-4-amine 2 with a 3-(hydroxymethyl)piperidine. The resulting compound (1'-{4-[(4-chlorophenyl)amino]-6,7-dimethoxyquinazolin-2-yl}-1,4'-bipiperidin-3-yl)methanol 8ic was a strong inhibitor of human/mouse chemotaxis. Oral administration of 8ic showed anti-inflammatory activity in a murine model of acute dermatitis (oxazolone-induced contact hypersensitivity test) in a dose-dependent manner.
Collapse
Affiliation(s)
- Kazuhiro Yokoyama
- Drug Discovery Research, Astellas Pharma Inc., 21 Miyukigaoka, Tsukuba-shi, Ibaraki 305-8585, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Zharlyganova D, Harada H, Harada Y, Shinkarev S, Zhumadilov Z, Zhunusova A, Tchaizhunusova NJ, Apsalikov KN, Kemaikin V, Zhumadilov K, Kawano N, Kimura A, Hoshi M. High frequency of AML1/RUNX1 point mutations in radiation-associated myelodysplastic syndrome around Semipalatinsk nuclear test site. J Radiat Res 2008; 49:549-555. [PMID: 18724045 DOI: 10.1269/jrr.08040] [Citation(s) in RCA: 17] [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: 05/26/2023]
Abstract
It is known that bone marrow is a sensitive organ to ionizing radiation, and many patients with acute myeloid leukemia (AML) or myelodysplastic syndrome (MDS) have been diagnosed in radiation-treated cases and atomic bomb survivors in Hiroshima and Nagasaki. The AML1/RUNX1 gene has been known to be frequently mutated in MDS/AML patients among atomic bomb survivors and radiation therapy-related MDS/AML patients. In this study, we investigated the AML1 mutations in radiation-exposed patients with MDS/AML among the residents near the Semipalatinsk Nuclear Test Site (SNTS), where the risk of solid cancers and leukemias was increased due to the radiation effects. AML1 mutations were identified in 7 (39%) of 18 radiation-exposed MDS/AML patients. In contrast, no AML1 mutation was found in 13 unexposed MDS/AML cases. The frequency of AML1 mutations in radiation-exposed patients with MDS/AML was significantly higher compared with unexposed patients (p < 0.05).We also found a significant correlation between individual estimated doses and AML1 mutations (p < 0.05). Considering these results, AML1 point mutations might be a useful biomarker that differentiates radio-induced MDS/AML from spontaneous MDS/AML.
Collapse
Affiliation(s)
- Dinara Zharlyganova
- Department of Radiation Biophysics, Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Yokoyama K, Ishikawa N, Igarashi S, Kawano N, Masuda N, Hattori K, Miyazaki T, Ogino SI, Orita M, Matsumoto Y, Takeuchi M, Ohta M. Potent CCR4 antagonists: synthesis, evaluation, and docking study of 2,4-diaminoquinazolines. Bioorg Med Chem 2008; 16:7968-74. [PMID: 18694645 DOI: 10.1016/j.bmc.2008.07.062] [Citation(s) in RCA: 20] [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: 06/25/2008] [Revised: 07/22/2008] [Accepted: 07/23/2008] [Indexed: 11/28/2022]
Abstract
A series of CC chemokine receptor-4 (CCR4) antagonists were examined in a previous report in an attempt to improve metabolic stability in human liver microsomes. In this study, the cycloheptylamine moiety of N-cycloheptyl-6,7-dimethoxy-2-(4-pyrrolidin-1-ylpiperidin-1-yl)quinazolin-4-amine 1 was replaced with the p-chloroaniline moiety, and the resulting compound, N-(4-chlorophenyl)-6,7-dimethoxy-2-(4-pyrrolidin-1-ylpiperidin-1-yl)quinazolin-4-amine (8c), retained its potency ([(35)S]GTPgammaS-binding inhibition and CCL22-induced chemotaxis in humans/mice). Based on the structure-activity relationships (SAR), a homology model was constructed for CCR4 to explain the binding mode of 8c. Overall, there was good agreement between the docking pose of the CCR4 homology model and the human [(35)S]GTPgammaS assay results. Administration of 8c in a murine model of acute dermatitis showed anti-inflammatory activity (oxazolone-induced contact hypersensitivity test).
Collapse
Affiliation(s)
- Kazuhiro Yokoyama
- Drug Discovery Research, Astellas Pharma Inc., 21 Miyukigaoka, Tsukuba-shi, Ibaraki 305-8585, Japan.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Hirabayashi K, Kawano N, Ohtaki M, Harada Y, Harada H, Muldagaliyev T, Apsalikov K, Hoshi M. Health status of radiation exposed residents living near the Semipalatinsk Nuclear Test Site based on health assessment by interview. Hiroshima J Med Sci 2008; 57:27-35. [PMID: 18578364] [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: 05/26/2023]
Abstract
The purpose of the present paper is to examine the aftereffects of radiation exposure on residents of villages near the Semipalatinsk Nuclear Test Site (SNTS) in Kazakhstan. Our Hiroshima University (Japan) research team began field research in 2002 by means of health assessments conducted via interviews. We focus on persons who responded to questions concerning their medical conditions and symptoms. In this paper, we summarize and analyze, using multiple linear logistic regression analysis, the answers obtained by questionnaire survey. The results show: (1) 31% of the residents reported that they felt bad or were in very poor health. (2) Residents living in villages having higher radiation levels were more likely to report having poor or very poor health, minor complaints such as loss of sleep, headaches, nighttime sweating and swollen arms or legs, and the need for nursing care in performing activities of daily living. (3) Symptoms reported by over 40% of the respondents included high blood pressure, heart disease and arthralgia/ lower back pain/ arthritis. Our results suggest that radiation exposure in the Semipalatinsk area is one of the causes of poor health in general among residents. There is also a possibility that radiation exposure has influenced the incidence of some specific medical conditions.
Collapse
Affiliation(s)
- Kyoko Hirabayashi
- Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | | | | | | | | | | | | | | |
Collapse
|
37
|
Taooka Y, Takeichi N, Noso Y, Kawano N, Apsalikov KN, Hoshi M. Increased T-cell receptor mutation frequency in radiation-exposed residents living near the Semipalatinsk nuclear test site. J Radiat Res 2006; 47 Suppl A:A179-81. [PMID: 16571935 DOI: 10.1269/jrr.47.a179] [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] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
From 1949 to 1989, 488 nuclear explosions were carried out in Semipalatinsk, and the cancer risk is increased in this region. Measuring somatic-cell mutation frequencies may be a useful tool for evaluating cancer risk within radiation-exposed populations. Here, we report the first evidence of increased T-cell receptor (TCR) mutations in peripheral blood from radiation-exposed residents of Semipalatinsk. The TCR mutation frequency in the highly exposed residents (Dolon and Sarzhal) was significantly higher than in the control group (Kokpekti). There was no statistically significant difference between the control group and the weakly exposed group (Kaynar and Semipalatinsk-city). The TCR mutation assay appeared to be a useful biological dosimeter even after a period of 40 years since radiation exposure. This may be the result of specific conditions, such as the presence of internal exposure.
Collapse
Affiliation(s)
- Yasuyuki Taooka
- Research Institute for Radiation Biology and Medicine, Hiroshima University, Japan.
| | | | | | | | | | | |
Collapse
|
38
|
Stepanenko VF, Hoshi M, Bailiff IK, Ivannikov AI, Toyoda S, Yamamoto M, Simon SL, Matsuo M, Kawano N, Zhumadilov Z, Sasaki MS, Rosenson RI, Apsalikov KN. Around Semipalatinsk nuclear test site: progress of dose estimations relevant to the consequences of nuclear tests (a summary of 3rd Dosimetry Workshop on the Semipalatinsk nuclear test site area, RIRBM, Hiroshima University, Hiroshima, 9-11 of March, 2005). J Radiat Res 2006; 47 Suppl A:A1-13. [PMID: 16571923 DOI: 10.1269/jrr.47.a1] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The paper is an analytical overview of the main results presented at the 3rd Dosimetry Workshop in Hiroshima(9-11 of March 2005), where different aspects of the dose reconstruction around the Semipalatinsk nuclear test site(SNTS) were discussed and summarized. The results of the international intercomparison of the retrospective luminescence dosimetry(RLD) method for Dolon' village(Kazakhstan) were presented at the Workshop and good concurrence between dose estimations by different laboratories from 6 countries (Japan, Russia, USA, Germany, Finland and UK) was pointed out. The accumulated dose values in brick for a common depth of 10mm depth obtained independently by all participating laboratories were in good agreement for all four brick samples from Dolon' village, Kazakhstan, with the average value of the local gamma dose due to fallout (near the sampling locations) being about 220 mGy(background dose has been subtracted).Furthermore, using a conversion factor of about 2 to obtain the free-in-air dose, a value of local dose approximately 440 mGy is obtained, which supports the results of external dose calculations for Dolon': recently published soil contamination data, archive information and new models were used for refining dose calculations and the external dose in air for Dolon village was estimated to be about 500 mGy. The results of electron spin resonance(ESR) dosimetry with tooth enamel have demonstrated the notable progress in application of ESR dosimetry to the problems of dose reconstruction around the Semipalatinsk nuclear test site. At the present moment, dose estimates by the ESR method have become more consistent with calculated values and with retrospective luminescence dosimetry data, but differences between ESR dose estimates and RLD/calculation data were noted. For example mean ESR dose for eligible tooth samples from Dolon' village was estimated to be about 140 mGy(above background dose), which is less than dose values obtained by RLD and calculations. A possible explanation of the differences between ESR and RLD/calculations doses is the following: for interpretation of ESR data the "shielding and behaviour" factors for investigated persons should be taken into account. The "upper level" of the combination of "shielding and behaviour" factors of dose reduction for inhabitants of Dolon' village of about 0.28 was obtained by comparing the individual ESR tooth enamel dose estimates with the calculated mean dose for this settlement. The biological dosimetry data related to the settlements near SNTS were presented at the Workshop. A higher incidence of unstable chromosome aberrations, micronucleus in lymphocytes, nuclear abnormalities of thyroid follicular cells, T-cell receptor mutations in peripheral blood were found for exposed areas (Dolon', Sarjal) in comparison with unexposed ones(Kokpekty). The significant greater frequency of stable translocations (results of analyses of chromosome aberrations in lymphocytes by the FISH technique) was demonstrated for Dolon' village in comparison with Chekoman(unexposed village). The elevated level of stable translocations in Dolon' corresponds to a dose of about 180 mSv, which is close to the results of ESR dosimetry for this village. The importance of investigating specific morphological types of thyroid nodules for thyroid dosimetry studies was pointed out. In general the 3rd Dosimetry Workshop has demonstrated remarkable progress in developing an international level of common approaches for retrospective dose estimations around the SNTS and in understanding the tasks for the future joint work in this direction. In the framework of a special session the problems of developing a database and registry in order to support epidemiological studies around SNTS were discussed. The results of investigation of psychological consequences of nuclear tests, which are expressed in the form of verbal behaviour, were presented at this session as well.
Collapse
Affiliation(s)
- Valeriy F Stepanenko
- Research Institute for Radiation Biology and Medicine (RIRBM), Hiroshima University, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Kawano N, Ohtaki M. Remarkable experiences of the nuclear tests in residents near the Semipalatinsk nuclear test site: analysis based on the questionnaire surveys. J Radiat Res 2006; 47 Suppl A:A199-207. [PMID: 16571938 DOI: 10.1269/jrr.47.a199] [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: 05/08/2023]
Abstract
The main objective of this paper is to identify salient experiences of those who were exposed to radiation by the nuclear tests at the Semipalatinsk Nuclear Tests Site (SNTS). In 2002, our research team of the Research Institute for Radiation Biology and Medicine, Hiroshima University, started to conduct some field research by means of a questionnaire survey. Through this, we expected to examine the health condition of the residents near the SNTS, identify their experiences from the nuclear tests, and understand the exposure path. This attempt at clarifying the reality of radiation exposure at Semipalatinsk through the use of a survey research method is the first of its kind. Among the responses to our survey, the present paper focuses mainly upon responses to the questions concerning the experiences of the nuclear tests. It deals mainly with direct experiences of nuclear tests of the residents characteristic to Semipalatinsk, including some new experiences hitherto unnoticed. The present paper touches upon their concrete direct experiences of flash, bomb blast, heat, rain and dust. We also discuss distinct experiences in Semipalatinsk such as evacuation, through the additional use of their testimonies. The data have been compared with the results obtained in a similar survey made in Hiroshima and Nagasaki. For the data analysis, a statistical method called logistic multiple linear regression analysis has been used.
Collapse
Affiliation(s)
- Noriyuki Kawano
- Research Institute for Radiation Biology and Medicine, Hiroshima University, Japan.
| | | |
Collapse
|
40
|
Kawano N, Hirabayashi K, Matsuo M, Taooka Y, Hiraoka T, Apsalikov KN, Moldagaliev T, Hoshi M. Human suffering effects of nuclear tests at Semipalatinsk, Kazakhstan: established on the basis of questionnaire surveys. J Radiat Res 2006; 47 Suppl A:A209-17. [PMID: 16571939 DOI: 10.1269/jrr.47.a209] [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: 05/08/2023]
Abstract
The main objective of the present paper is to explore the effects of radiation exposure on the inhabitants near the Semipalatinsk Nuclear Tests Site (SNTS), Kazakhstan. Our research team of the Research Institute for Radiation Biology and Medicine, Hiroshima University, started in 2002 to conduct a field research study using questionnaire surveys. The present paper attempts to clarify health effects and mental problems on the inhabitants by using our questionnaire surveys. Among the responses to our survey, the present paper focuses upon responses to the questions concerning their health and mental problems. The data in Semipalatinsk have been compared with the results obtained in a similar survey conducted by Hiroshima and Nagasaki cities. The results show: (1) 33% of the residents replied that they felt bad or had very bad health conditions. (2) 70% of the residents strongly recognized a causal relationship between their bad health conditions and the nuclear tests. (3) The diseases that over 30% of respondents possessed are arthralgia/ lower back pain/ arthritis, high-blood pressure, heart disease and digestive system disease. (4) Acute radiation injuries from 1949 to 1962 that over 20% of respondents experienced were headaches and general malaise. (5) Concerning their mental condition, 22% of respondents felt easily frustrated and agitated and 21% experienced nightmare.
Collapse
Affiliation(s)
- Noriyuki Kawano
- Research Institute for Radiation Biology and Medicine, Hiroshima University, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
41
|
Matsuo M, Kawano N, Satoh K, Apsalikov KN, Moldagaliev T. Overall image of nuclear tests and their human effects at Semipalatinsk: an attempt at analyses based on verbal data. J Radiat Res 2006; 47 Suppl A:A219-24. [PMID: 16571940 DOI: 10.1269/jrr.47.a219] [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] [Indexed: 05/08/2023]
Abstract
The present paper is part of an attempt at finally reconstructing the realities of nuclear tests and their human effects near Semipalatinsk, Kazakhstan. As a first step, it tries to reconstruct the overall image of nuclear tests and their human effects. Our data are 199 written testimonies of those affected by radiation, which were collected in 2002 and 2003. We statistically processed them, and categorized those words and expressions, which occurred most frequently in the testimonies, and obtained some forty categories, which represent the experiences, feelings, desires of those affected by radiation. Next, we conducted a principal component analysis of the categories. The result shows: (1) The experiences of the nuclear tests are arranged along the time axis, with direct experiences of the nuclear tests forming one coherent part of the perception and memory, and with other subsequent experiences forming another. (2) Of the latter, we can discern a core of the experiences on human effects such as "disease," "death," "family," "radiation," and so on. (3) And around this core, we see two different trends: one pointing to the current distress and plight, and the other pointing to future fear and hope.
Collapse
|
42
|
Shimada Y, Taniguchi N, Matsuhisa A, Akane H, Kawano N, Suzuki T, Tobe T, Kakefuda A, Yatsu T, Tahara A, Tomura Y, Kusayama T, Wada KI, Tsukada J, Orita M, Tsunoda T, Tanaka A. Synthesis and biological activity of novel 4,4-difluorobenzazepine derivatives as non-peptide antagonists of the arginine vasopressin V1A receptor. Bioorg Med Chem 2005; 14:1827-37. [PMID: 16290163 DOI: 10.1016/j.bmc.2005.10.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2005] [Revised: 10/19/2005] [Accepted: 10/20/2005] [Indexed: 11/25/2022]
Abstract
To find potent and selective antagonists of the arginine vasopressin (AVP) V1A receptor, optimization studies of compounds structurally related to (Z)-N-{4'-[(4,4-difluoro-5-carbamoylmethylidene-2,3,4,5-tetrahydro-1H-1-benzazepin-1-yl)carbonyl]phenyl}carboxamide were performed. The synthesis and pharmacological properties of these compounds are described. We first investigated the effect of the carboxamide moiety, and found that a 2-methylfuran-3-carbonyl group at this position increased V1A binding affinity and selectivity for the V1A receptor versus the V2 receptor. The amino group of the 5-carbamoylmethylidene moiety was also examined, and a 4-piperidinopiperidino group was found to be optimal at this position. The hemifumarate of compound 12l (YM218) was shown to exhibit potent binding affinity, V1A receptor selectivity, and in vivo antagonist activity.
Collapse
Affiliation(s)
- Yoshiaki Shimada
- Drug Discovery Research, Astellas Pharma Inc., Tsukuba, Ibaraki 300-2698, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Hisamichi H, Naito R, Toyoshima A, Kawano N, Ichikawa A, Orita A, Orita M, Hamada N, Takeuchi M, Ohta M, Tsukamoto SI. Synthetic studies on novel Syk inhibitors. Part 1: Synthesis and structure–activity relationships of pyrimidine-5-carboxamide derivatives. Bioorg Med Chem 2005; 13:4936-51. [PMID: 15990316 DOI: 10.1016/j.bmc.2005.05.033] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2005] [Revised: 05/17/2005] [Accepted: 05/17/2005] [Indexed: 10/25/2022]
Abstract
Spleen tyrosine kinase (Syk) is a non-receptor-type tyrosine kinase which mediates diverse responses in haematopoietic cells. Therefore, Syk is an attractive therapeutic target, and in a study of Syk inhibitors as potentially new therapeutic agents, we discovered the 4-anilinopyrimidine-5-carboxamides. Enzyme screening indicated that an aminoethylamino moiety at the 2-position of the pyrimidine ring was important for Syk inhibitory activity, and an investigation of the substituents at the 4-position revealed that an anilino moiety substituted at the meta position was preferred. These compounds showed high selectivity for Syk, compared to other kinases, such as ZAP-70, c-Src, and PKC, and exhibited good inhibitory activities against 5-HT release from RBL-cells. Among them, compound 9a inhibited the passive cutaneous anaphylaxis reaction in mice, with an ID50 of 13 mg/kg following subcutaneous administration. These results suggest that our compounds are worthy of further evaluation as new anti-allergic agents.
Collapse
Affiliation(s)
- Hiroyuki Hisamichi
- Institute for Drug Discovery Research, Astellas Pharma Inc., 21 Miyukigaoka, Tsukuba, Ibaraki 305-8585, Japan.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Kawano N, Ishikawa F, Shimoda K, Yasukawa M, Nagafuji K, Miyamoto T, Baba E, Tanaka T, Yamasaki S, Gondo H, Otsuka T, Ohshima K, Shultz LD, Akashi K, Harada M. Efficient engraftment of primary adult T-cell leukemia cells in newborn NOD/SCID/β2-microglobulinnull mice. Leukemia 2005; 19:1384-90. [PMID: 15959532 DOI: 10.1038/sj.leu.2403829] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Adult T-cell leukemia (ATL) develops via multiple oncogenic steps in human T-cell leukemia virus type I (HTLV-I) carriers. To better understand pathogenesis of ATL, we developed a novel xenogeneic engraftment model in which primary ATL cells are intravenously transplanted into neonatal nonobese diabetic (NOD)/severe-combined immunodeficiency (SCID)/beta2-microglobulin(null) (NOD/SCID/beta2m(null)) mice. Acute-type ATL cells engrafted in the peripheral blood and in the lymph nodes of recipients at a high efficiency. Engrafted ATL cells were dually positive for human CD4 and CD25, and displayed patterns of HTLV-I integration identical to those of donors by Southern blot analysis. These cells infiltrated into recipients' liver, and formed nodular lesions, recapitulating the clinical feature of each patient. In contrast, in smoldering-type ATL cases, multiple clones of ATL cells engrafted efficiently in NOD/SCID/beta2m(null) mice. When smoldering-type ATL cells were retransplanted into secondary NOD/SCID/beta2m(null) recipients, single HTLV-I-infected clones became predominant, suggesting that clones with dominant proliferative activity can be competitively selected in this xenogeneic system. Taken together, the NOD/SCID/beta2m(null) newborn system is useful to understand kinetics, metastasis, and disease progression of ATL in vivo.
Collapse
Affiliation(s)
- N Kawano
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medicine, Fukuoka, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Shimada Y, Akane H, Taniguchi N, Matsuhisa A, Kawano N, Tanaka A. Stereoselective Synthesis of Methyl (Z)-(4,4-Difluoro-2,3,4,5-tetrahydro-1H-1-benzazepin-5-ylidene)acetate Using a Dianion Horner-Wadsworth-Emmons Reagent. Chem Pharm Bull (Tokyo) 2005; 53:589-90. [PMID: 15863939 DOI: 10.1248/cpb.53.589] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Stereoselective synthesis of methyl (Z)-(4,4-difluoro-2,3,4,5-tetrahydro-1H-1-benzazepin-5-ylidene)acetate (1a) is described. Z-selectivity of the Horner-Wadsworth-Emmons (HWE) reaction was obtained based on an investigation of the reaction conditions for introduction of a methylidene group onto the 5-position of benzazepine.
Collapse
Affiliation(s)
- Yoshiaki Shimada
- Institute for Drug Discovery Research, Yamanouchi Pharmaceutical Co., Ltd., 21 Miyukigaoka, Tsukuba, Ibaraki 305-8585, Japan.
| | | | | | | | | | | |
Collapse
|
46
|
Utsuki S, Oka H, Sato Y, Kawano N, Tsuchiya B, Kobayashi I, Fujii K. Invasive meningioma is associated with a low expression of E-cadherin and beta-catenin. Clin Neuropathol 2005; 24:8-12. [PMID: 15696778] [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: 05/01/2023] Open
Abstract
Invasive meningioma shows benign histological features (WHO grade 1) and the brain expansion at the tumor-brain interface, and recurs more frequently than common meningiomas. To determine the mechanism of brain expansion, we studied the relationship between invasive meningioma and cell adhesion molecules. Immunostaining for E-cadherin (E-CH), N-cadherin (N-CH), beta-catenin, and Ki-67 was performed in 103 meningiomas that consisted of 61 meningothelial meningiomas, 25 fibrous meningiomas, 12 invasive meningiomas and 5 anaplastic meningiomas. All tumors were negative for N-CH. All the 61 meningothelial meningiomas, 10 of 12 invasive meningiomas, and 3 of 5 anaplastic meningiomas were positive for both E-CH and beta-catenin, while these were both negative in all of the fibrous meningiomas. In invasive meningiomas, the expansive part of the tumor showed a lower rate (4/12 tumors) of E-CH and beta-catenin positivity, while the central part showed a higher rate (10/12 tumors). The Ki-67 labeling index was higher in invasive and anaplastic meningiomas than in meningothelial meningiomas. These results suggest that a reduction in cell adhesion molecules and increased proliferative activity may be related, which may lead to a better understanding of the mechanism of meningioma expansion in the future.
Collapse
Affiliation(s)
- S Utsuki
- Department of Neurosurgery, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan.
| | | | | | | | | | | | | |
Collapse
|
47
|
Shimada Y, Akane H, Taniguchi N, Matsuhisa A, Kawano N, Kikuchi K, Yatsu T, Tahara A, Tomura Y, Kusayama T, Wada KI, Tsukada J, Tsunoda T, Tanaka A. Preparation of Highly Potent and Selective Non-Peptide Antagonists of the Arginine Vasopressin V1A Receptor by Introduction of a 2-Ethyl-1H-1-imidazolyl Group. Chem Pharm Bull (Tokyo) 2005; 53:764-9. [PMID: 15997131 DOI: 10.1248/cpb.53.764] [Citation(s) in RCA: 9] [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: 11/22/2022]
Abstract
To find a new series of arginine vasopressin (AVP) V1A receptor antagonists, the influence of the 2-phenyl group of 2-phenyl-4'-[(2,3,4,5-tetrahydro-1H-1-benzazepin-1-yl)carbonyl]benzanilide (7) was investigated. Replacement of the 2-phenyl group by a 2-ethyl-1H-imidazol-1-yl group was effective in yielding a V1A-selective compound. Moreover, this imidazolyl group was introduced in the same position in YM-35471 (6), and further studies of these compounds were performed. Consequently, we found that the (Z)-4'-({4,4-difluoro-5-[(N-cyclopropylcarbamoyl)methylene]-2,3,4,5-tetrahydro-1H-1-benzazepin-1-yl}carbonyl)-2-(2-ethyl-1H-1-imidazol-1-yl)benzanilide (9f) exhibited highly potent affinity and selectivity, and was the most potent antagonist for the V1A receptor among our compounds. The synthesis and pharmacological evaluation of these compounds are described in this paper.
Collapse
Affiliation(s)
- Yoshiaki Shimada
- Institute for Drug Discovery Research, Yamanouchi Pharmaceutical Co., Ltd., Tsukuba, Ibaraki, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
48
|
Kawano N, Shimada M, Terada T. Motility and penetration competence of frozen–thawed miniature pig spermatozoa are substantially altered by exposure to seminal plasma before freezing. Theriogenology 2004; 61:351-64. [PMID: 14662134 DOI: 10.1016/s0093-691x(03)00218-8] [Citation(s) in RCA: 21] [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: 10/27/2022]
Abstract
The objective was to determine if exposure of spermatozoa to seminal plasma before freezing decreases its freezability, assessed by percentage motile cells (using computer-assisted semen analysis) and in vitro penetration ability (using in vitro fertilization and chlortetracycline fluorescence assessment). Ejaculated spermatozoa from miniature pigs were washed by centrifugation within 20 min after collection, then incubated in seminal plasma or modified Hulsenberg VIII diluents (mHM). When the spermatozoa were cryopreserved, spermatozoa incubated in seminal plasma before freezing had significantly lower post-thaw motility than spermatozoa incubated in mHM. The incubation of spermatozoa in seminal plasma also significantly prevented frozen-thawed spermatozoa from penetrating the oocytes. The second experiment, using unfrozen spermatozoa, was to determine if the incubation of spermatozoa with seminal plasma reduced penetration ability before freezing, resulting in a significantly lower penetration rate after freezing (compared with spermatozoa incubated without seminal plasma). The penetration competence of unfrozen spermatozoa was significantly decreased by incubation in seminal plasma, but no difference in motility was observed between spermatozoa exposed to seminal plasma versus mHM. We concluded that ejaculated seminal plasma contained some factor(s) that modified the sperm before freezing and reduced the freezability and post-thaw penetration competence of spermatozoa.
Collapse
Affiliation(s)
- N Kawano
- Animal Reproduction Lab, Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8528, Japan
| | | | | |
Collapse
|
49
|
Yamasaki S, Henzan H, Ohno Y, Yamanaka T, Iino T, Itou Y, Kuroiwa M, Maeda M, Kawano N, Kinukawa N, Miyamoto T, Nagafuji K, Shimoda K, Inaba S, Hayashi S, Taniguchi S, Shibuya T, Gondo H, Otsuka T, Harada M. Influence of transplanted dose of CD56+ cells on development of graft-versus-host disease in patients receiving G-CSF-mobilized peripheral blood progenitor cells from HLA-identical sibling donors. Bone Marrow Transplant 2003; 32:505-10. [PMID: 12942097 DOI: 10.1038/sj.bmt.1704165] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We investigated effects of variations in the cellular composition of G-CSF-mobilized peripheral blood progenitor cell (G-PBPC) allografts on clinical outcomes of allogeneic PBPC transplantation. We retrospectively analyzed transplanted doses of various immunocompetent cells from 27 HLA-identical sibling donors in relation to engraftment, incidence of graft-versus-host disease (GVHD), and survival. Significant variability was documented in both absolute numbers and relative proportions of CD34+, CD2+, CD3+, CD4(high)+, CD4+25+, CD8(high)+, CD19+, CD56+, and CD56+16+ cells contained in these allografts. Stepwise Cox regression analysis revealed that the CD56+ cell dose was significantly inversely correlated with the incidence of GVHD. Thus, there was a significantly higher incidence of grade II acute GVHD in patients receiving a lower CD56+16+ cell dose (hazard ratio (HR) 0.0090; 95% confidence interval (CI), <0.00001-3.38; P=0.031), a higher incidence of chronic GVHD in those receiving allografts with a lower CD56+16+ to CD34+ ratio (HR <0.00001; 95% CI <0.00001-0.0007; P=0.0035), and a higher incidence of extensive chronic GVHD in those receiving allografts with a lower CD56+ to CD34+ ratio (HR <0.00001; 95% CI <0.00001-0.053; P=0.0083). These results suggest that CD56+ cells in G-PBPC allografts from HLA-identical sibling donors may play an important role in preventing the development of GVHD.
Collapse
Affiliation(s)
- S Yamasaki
- Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Macák J, Mukensnábl P, Kawano N, Bobot L, Dusková M, Vácha P. [Intra-abdominal desmoplastic small-cell tumor of the peritoneum]. Cesk Patol 2003; 39:69-75. [PMID: 12874904] [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: 03/03/2023]
Abstract
The authors described three cases of intraabdominal desmoplastic small round cell tumour of the peritoneum (IDSRT). In one case the patient was a woman, and in the other two men. The age ranged from 20-29 years. Common of all the cases was a rapid onset of clinical symptoms during the period of twelve to eighteen months. In one case, a 22-year-old woman presented with a symptomless course of disease documented by medical examination one month ago. Intensive chemotherapy was applied but two patients died of generalisation. The 22-year-old woman is alive but with clinical evidence of generalisation in the abdominal cavity. The "classical" type of IDSRT was found in all the cases. Sharply demarcated groups of tumour cells of different size were surrounded by dense fibrous stroma. In some regions desmoplastic areas prevailed. In one case the tumour consisted of round and oval cells resembling a lymphoma. In the other two cases, the slightly elongated cells were present. Immunohistologically, the small round cells were positive for cytokeratins with antibody AE1-AE3. Membrane and dot-like paranuclear positivity were found. In 2 cases the reaction to desmin was seen in a dot-like paranuclear distribution, whereas the reaction to smooth muscle actin (MSA) was negative. In all the cases positivity to vimentin and neuron specific enolase (NSE) were apparent. Negative reactions were found for WT-1 antibody in all three cases. In one of the cases the RT PCR reaction for chimeric gene EWS/WT1 was performed, and found to be negative. Many different tumour types, such as lymphoma, Ewing sarcoma/PNET, neuroblastoma, alveolar rhabdomyosarcoma, malignant mesothelioma must be excluded. Cytogenetic examination should be performed on tumours with a "non-typical" histological pattern and uncommon immunohistological examinations.
Collapse
Affiliation(s)
- J Macák
- Ustav patologické anatomie Lékarské fakulty Univerzity Palackého, Fakultní nemocnice, Laborator imunohistologických a speciálních metod, Olomouc
| | | | | | | | | | | |
Collapse
|