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Yamano Y. [Research on Occupational Poisoning and Biological Monitoring]. Sangyo Eiseigaku Zasshi 2024; 66:63-72. [PMID: 37766566 DOI: 10.1539/sangyoeisei.2023-026-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/29/2023]
Abstract
OBJECTIVE A new system for the regulation of chemical substances was introduced in Japan in April 2023. Unlike delineated rules, the new system does not specify any specific measures for individual substances, but is rather based on the management of health through the voluntary implementation of measures in order to reduce exposure to all dangerous/hazardous chemical substances. Regarding specific methods, exposures will be mainly elucidated through the measurement of a work environment. However, the necessity of biological monitoring should also be considered. This study aimed to identify the importance of biological monitoring by reviewing changes made over time in biological monitoring methods used for occupational poisoning. METHOD The study presents occupational poisoning by several compounds (methyl bromide, polycyclic aromatic hydrocarbons, and MOCA) and the corresponding biological monitoring methods utilized, as researched by the author. Changes in biological monitoring based on the history of the Study Group on Occupational Poisoning and Biological Monitoring of the Japan Society for Occupational Health are also introduced. RESULTS The areas of occupational poisoning at different times and cases of occupational cancer caused by exposure to chemical substances were presented in lectures held by the Study Group on Occupational Poisoning and Biological Monitoring. These lectures showed that although biological monitoring was previously implemented primarily by measuring the urinary metabolites of the exposed substance, the monitoring methods used have changed as the nature of exposure has changed, leading to the development of new tools that detect trace, low concentration, and mixed exposures. CONCLUSION The health management of workers handling chemical substances at occupational sites will be shifted to autonomous management. However, it should be noted that only biological monitoring can detect and prove true exposure. Particularly, risk assessment by biological monitoring is necessary for substances that are suspected to be absorbed through the skin, and the measurement methods used should continue to be developed and refined. The significance of biological monitoring will continue to increase.
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Affiliation(s)
- Yuko Yamano
- Department of Hygiene, Public Health and Preventive Medicine, Showa University, School of Medicine
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Michaels P, Kung F, Nguyen S, Slover C, Shortridge D, Streit J, Echols R, Takemura M, Yamano Y. 461 In vitro antibacterial activity of cefiderocol against a multinational collection of Pseudomonas aeruginosa isolates from people with cystic fibrosis: SENTRY 2020–2021. J Cyst Fibros 2022. [DOI: 10.1016/s1569-1993(22)01151-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Nagashima D, Izumo N, Yamauchi T, Okubo S, Yamano Y. Acrylamide reduced neurite outgrowth by suppressing p44/42 expression levels in PC12 cells. Saf Health Work 2022. [DOI: 10.1016/j.shaw.2021.12.1251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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4
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Yamano Y, Shigeko Okubo, Yamauchi T, Mitsutoshi T, Kenji N. Exposure to metal in dust in dental laboratories in Japan. Saf Health Work 2022. [DOI: 10.1016/j.shaw.2021.12.1470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Den H, Okubo S, Yamauchi T, Yamano Y, Kokaze A. Influence of lower trunk muscle mass on developing low back pain among health care workers: a prospective cohort study. Saf Health Work 2022. [DOI: 10.1016/j.shaw.2021.12.1208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Yamauchi T, Nagashima D, Okubo S, Yamano Y. Quantification of bromide ion in biological samples using headspace gas chromatography-mass spectrometry. Saf Health Work 2022. [DOI: 10.1016/j.shaw.2021.12.1499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Nakashita C, Xi L, Inoue Y, Kabura R, Masuda S, Yamano Y, Katoh T. Impact of dietary compositions and patterns on the prevalence of nonalcoholic fatty liver disease in Japanese men: a cross-sectional study. BMC Gastroenterol 2021; 21:342. [PMID: 34481454 PMCID: PMC8418738 DOI: 10.1186/s12876-021-01919-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 08/25/2021] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND This study aimed to examine the impact of dietary compositions and patterns on nonalcoholic fatty liver disease (NAFLD) morbidity in Japanese men. METHODS We conducted a cross-sectional study of 281 individuals who underwent comprehensive medical examinations during health screening. Dietary intake was assessed using a semi-quantitative food frequency questionnaire, and factor analysis was performed to detect dietary patterns. NAFLD was diagnosed by the presence of fatty liver on abdominal ultrasonography in nondrinkers (< 30 g/day), and patients were categorized into control (n = 192) and NAFLD groups (n = 89). RESULTS Compared with the control group, the NAFLD group consumed fewer mushrooms. Three dietary patterns were identified, namely, a healthy pattern, a western pattern, and a snack pattern. The score of healthy pattern was negatively correlated with the risk of NAFLD. Compared with the lowest tertile of the healthy pattern, the middle tertile was associated with a lower risk of NAFLD after adjusting for age, physical activity, and smoking (odds ratio: 0.47, 95% confidence interval: 0.25-0.91). After further adjustments for body mass index, the middle tertile was associated with a lower risk of NAFLD (odds ratio: 0.46, 95% confidence interval: 0.23-0.92). CONCLUSIONS A healthy dietary pattern comprising frequent intake of seaweeds, vegetables, mushrooms, pulses, and potatoes and starches was associated with a lower risk of NAFLD in Japanese men. In our opinion, this healthy pattern closely resembles the Japanese Washoku diet, indicating that adherence to Washoku may help prevent NAFLD.
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Affiliation(s)
- Chihiro Nakashita
- Department of Public Health, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjou, Chuo-ku, Kumamoto, 860-8556, Japan. .,Division of Food and Health Environmental Sciences, Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto, 3-1-100 Tsukide, Higashi-ku, Kumamoto, 862-8502, Japan.
| | - Lu Xi
- Department of Public Health, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjou, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Yasushi Inoue
- Department of Public Health, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjou, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Ryota Kabura
- Department of Public Health, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjou, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Shota Masuda
- Department of Public Health, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjou, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Yuko Yamano
- Department of Hygiene and Preventive Medicine, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Takahiko Katoh
- Department of Public Health, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjou, Chuo-ku, Kumamoto, 860-8556, Japan
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Nagashima D, Furukawa M, Yamano Y, Yamauchi T, Okubo S, Toho M, Ito Y, Izumo N. Zinc-containing Mohs' paste affects blood flow and angiogenesis suppression. ACTA ACUST UNITED AC 2021; 29:321-328. [PMID: 34417987 DOI: 10.1007/s40199-021-00409-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 07/20/2021] [Indexed: 10/20/2022]
Abstract
PURPOSE Mohs' paste, which is composed of zinc chloride and zinc oxide starch, is used for hemostasis of superficial malignancy in the clinical setting. We investigated the concentration of intramuscular zinc in mice after Mohs' paste application and evaluated its relationship with angiogenesis from the perspective of blood flow levels within 24 h. METHODS Male C57BL/6JJmsSlc mice were administered single dose of Mohs' paste at 25%, 50%, and 75% after unilateral hind limb surgery, and glycerin, a viscosity modifier, was administered to the control group (0%). Hind limb blood flow levels were measured with a laser Doppler perfusion imaging system (n = 6). The amounts of intramuscular zinc and vascular endothelial growth factor-A (VEGF-A) expression were analyzed using inductively coupled plasma mass spectrometry (ICP-MS) and western blotting, respectively (n = 5 or 3). RESULTS Blood flow levels were significantly decreased in the 50% group after 8 h, and significantly decreased in the 25% and 50% groups after 24 h. Intramuscular zinc was significantly increased in the 50% and 75% groups after 8 h. Western blotting showed that VEGF-A levels were significantly increased in the 25% and 50% groups after 8 h. Based on analytical experiments and biological investigation, we predicated the pharmacological effect of Mohs' paste and found over 50% of it is critical in the blood flow and angiogenesis suppression after more than 8 h of its application. CONCLUSIONS The results suggest that the mechanism of blood flow suppression is independent of VEGF-A levels and might suppress future angiogenesis. Our findings support that of previous studies, in which Mohs' paste was expected to induce hemostasis and suppress angiogenesis. It is an excellent ointment that facilitates hemostasis by suppressing blood flow regardless of angiogenesis, and may be apt for situations where hemostasis is required in the clinical setting.
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Affiliation(s)
- Daichi Nagashima
- Pharmaceutical Education Center, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama, Kanagawa, 245-0066, Japan.,General Health Medical Research Center, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama, Kanagawa, 245-0066, Japan
| | - Megumi Furukawa
- Pharmaceutical Education Center, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama, Kanagawa, 245-0066, Japan
| | - Yuko Yamano
- Department of Hygiene and Preventive Medicine, Showa University, 1-5-8 Hatanodai, Shinagawa, Tokyo, 142-8555, Japan
| | - Takenori Yamauchi
- Department of Hygiene and Preventive Medicine, Showa University, 1-5-8 Hatanodai, Shinagawa, Tokyo, 142-8555, Japan
| | - Shigeko Okubo
- Department of Hygiene and Preventive Medicine, Showa University, 1-5-8 Hatanodai, Shinagawa, Tokyo, 142-8555, Japan
| | - Masahiro Toho
- Laboratory of Pharmacotherapy, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama, Kanagawa, 245-0066, Japan
| | - Yoshihisa Ito
- Pharmaceutical Education Center, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama, Kanagawa, 245-0066, Japan
| | - Nobuo Izumo
- General Health Medical Research Center, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama, Kanagawa, 245-0066, Japan. .,Laboratory of Pharmacotherapy, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama, Kanagawa, 245-0066, Japan.
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Yamauchi T, Nagashima D, Okubo S, Kokaze A, Yamano Y. Quantification of bromide ion in biological samples using headspace gas chromatography-mass spectrometry. J Occup Health 2021; 63:e12274. [PMID: 34587337 PMCID: PMC8480881 DOI: 10.1002/1348-9585.12274] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 07/30/2021] [Accepted: 08/09/2021] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVES In this study, we aimed to establish a method for quantifying bromide ions (Br- ) in blood and urine using gas chromatograph-mass spectrometer (GC-MS) equipped with a headspace sampler, for biological monitoring of workers exposed to methyl bromide. METHODS Samples were mixed with dimethyl sulfate, and Br- ions were detected using GC-MS with a headspace sampler. The validity of the proposed method was evaluated based on most of the US FDA guidance. The values obtained were compared with reference values by analysis using SeronormTM Trace Elements Whole Blood L-1 RUO. RESULTS The calibration curve showed good linearity in the Br- concentration range of 0.1-20.0 mg/L, and the coefficient of determination R2 value was >.999. Intraday and interday accuracy values were 99.3%-103.1% and 97.4%-101.8%, respectively. The measured and reference values of Seronorm were concordant. Herein, eight urine and serum samples of workers were analyzed; the samples' Br- concentrations were known. The correlation coefficients of urine and serum samples were 0.97 and 0.96, respectively, and results were consistent. CONCLUSIONS This study established a simple and rapid method for the determination of Br- concentration in biological samples using GC-MS with a headspace sampler. Moreover, it can be used for biological monitoring of occupational exposure to methyl bromide and for the determination of Br- concentration in a wide range of biological samples.
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Affiliation(s)
- Takenori Yamauchi
- Department of Health and Preventive MedicineSchool of MedicineShowa UniversityTokyoJapan
| | - Daichi Nagashima
- Pharmaceutical Education CenterYokohama University of PharmacyKanagawaJapan
| | - Shigeko Okubo
- Department of Health and Preventive MedicineSchool of MedicineShowa UniversityTokyoJapan
| | - Akatsuki Kokaze
- Department of Health and Preventive MedicineSchool of MedicineShowa UniversityTokyoJapan
| | - Yuko Yamano
- Department of Health and Preventive MedicineSchool of MedicineShowa UniversityTokyoJapan
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Nakajima T, Yoshifuji H, Yamano Y, Handa H, Ohmura K, Mimori T, Terao C. THU0023 DETAILED PROFILE OF CO-OCCURRENCE OF RELAPSING POLYCHONDRITIS AND AUTOIMMUNE THYROID DISEASE. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.5349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Background:Relapsing polychondritis (RP) is a rare inflammatory disease, which is characterized by recurrent inflammation and destruction of cartilage tissues. RP also has the profile of autoimmune disease and is often complicated with other autoimmune disease. Autoimmune thyroid disease (AITD) is one of common autoimmune diseases, which consists of Graves’ disease (GD) and Hashimoto’s thyroiditis (HT). While RP is reported to be complicated with AITD1), there has been no study on detailed profile of co-occurrence of RP and AITD.Objectives:We aimed to reveal whether there is common (statistically significant) co-occurrence of RP and AITD. We also analyzed clinical and genetic profiles characterizing the co-occurrence.Methods:We recruited 117 patients with RP and checked their medical records in order to obtain the information about compilation of AITD and clinical features. In addition, we genotyped Human Leucocyte Antigen (HLA) A, B Cw, DRB1, DQB1 and DPB1 alleles for 88 of the 117 patients. Co-occurrence ratio was compared with prevalence of AITD in the Japanese population. Associations of co-occurrence of AITD with clinical manifestations or HLA alleles were analyzed among the patients.Results:Among the 117 patients with RP, 5 (4.3%) and 6 (5.1%) patients had GD and HT, respectively. Patients with RP were more likely to be complicated with GD (p=1.04×10-3, OR: 7.15, 95%CI 2.68~ 18.14) but not with HT (p=0.50, 95%CI 0.59~1.27), compared with prevalence in general Japanese population (0.62% and 5.9%, respectively2)). RP patients with GD showed a trend to have nasal involvement (100% vs 45.5%, p=0.023, OR: 2.58, 95%CI 1.09~∞). We did not observe any differences in clinical manifestation in patients with RP and HT. HLA- DPB1*02:02 demonstrated a trend toward GD complication (20% vs 2.3%, p=0.035, OR: 10.41, 95%CI 1.23~65.38). There were no association of HLA in the complication of HT among patients with RP.Conclusion:Patients with RP have high co-occurrence ratio of GD. Patients with the two diseases may be characterized by nasal involvement and HLA-DPB1*02:02.References:[1]Kung AW et al. Graves’ ophthalmopathy and relapsing polychondritis. Clin Exp Rheumatol. 1995 Jul-Aug;13(4):501-3.[2]Nagataki S et al. Thyroid diseases among atomic bomb survivors in Nagasaki. JAMA. 1994 Aug 3;272(5):364-70.Disclosure of Interests:Toshiki Nakajima Speakers bureau: Bristol-Myers Squibb and Novartis, Hajime Yoshifuji Grant/research support from: Astellas Pharma. (Outside the field of the present study.), Speakers bureau: Chugai Pharmaceutical. (Outside the field of the present study.), Yoshihisa Yamano: None declared, Hiroshi Handa: None declared, Koichiro Ohmura Grant/research support from: Astellas Pharma, AYUMI Pharmaceutical, Chugai Pharmaceutical, Daiichi Sankyo, Eisai, Japan Blood Products Organization, Mitsubishi Tanabe Pharma, Nippon Kayaku, Nippon Shinyaku, Sanofi, and Takeda Pharmaceutical., Speakers bureau: AbbVie, Actelion Pharmaceuticals Japan, Asahi Kasei Pharma, AYUMI Pharmaceutical, Bristol-Myers Squibb, Chugai Pharmaceutical, Eisai, Eli Lilly and Company, GlaxoSmithKline, Janssen Pharmaceutical, Mitsubishi Tanabe Pharma, Novartis Pharma, and Sanofi., Tsuneyo Mimori: None declared, Chikashi Terao Grant/research support from: Actelion, Speakers bureau: Asteras, Asahi Kasei Pharma, Ono and Tanabe-Mitsubishi
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Oi H, Yamano Y, Yokoyama T, Matsuda T, Morise M, Kataoka K, Kimura T, Kondoh Y. Weekly nab-PTX and weekly PTX for relapsed small cell lung cancer. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz437.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Tamaki K, Sato T, Tsugawa J, Fujioka S, Yagishita N, Araya N, Yamauchi J, Nagasaka M, Tsutsumi S, Yamano Y, Tsuboi Y. Cerebrospinal fluid CXCL10 as a surrogate marker of therapy-response and therapy-predict for HTLV-1-Associated myelopathy/tropical spastic paraparesis. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Hata A, Hasegawa M, Yamauchi T, Otomo Y, Miura M, Yamanaka K, Yamano Y, Fujitani N, Endo G. Metabolism of 3-[5'-deoxy-5'-(dimethylarsinoyl)-β-ribofuranosyloxy]-2-hydroxypropylene glycol in an artificial digestive system. Heliyon 2019; 5:e02079. [PMID: 31372544 PMCID: PMC6656958 DOI: 10.1016/j.heliyon.2019.e02079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 06/12/2019] [Accepted: 07/09/2019] [Indexed: 02/07/2023] Open
Abstract
Seaweeds contain large amounts of organoarsenic compounds, mostly arsenosugars (AsSug) and arsenolipids (AsLipid). AsSug is mainly metabolized into dimethylarsinic acid (DMAV) in humans. However, this metabolic process is not well understood. We investigated the metabolism of an AsSug, 3-[5'-deoxy-5'-(dimethylarsinoyl)-β-ribofuranosyloxy]-2-hydroxypropylene glycol (AsSug328), in the gastrointestinal tract using an in vitro artificial gastrointestinal digestion system. AsSug328 was incubated with gastric juice for 4 h, with bile-pancreatic juice for 0.5 h, and finally with enteric bacteria solution for 24 h. The conversion of arsenic compounds after artificial digestion was analyzed by HPLC-ICP-MS and HPLC-ESI-Q-TOF-MS. Our results show that artificial gastrointestinal digestion converted AsSug328 into thio-AsSug328. However, no formation of DMAV was detected. Under the artificial digestion system, the 5-deoxyribofuranose structure of AsSug was maintained. Therefore, AsSug should be absorbed in the intestinal tract after its sugar moiety is partially decomposed. They are then possibly metabolized to DMAV in the liver and subsequently excreted through urine.
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Affiliation(s)
- Akihisa Hata
- Faculty of Veterinary Medicine, Okayama University of Science, 1-3 Ikoino-oka, Imabari, Ehime, 794-8555, Japan
| | - Momoko Hasegawa
- Department of Medical Risk Management, Graduate School of Risk and Crisis Management, Chiba Institute of Science, 15-8 Shiomi-cho, Choshi, Chiba, 288-0025, Japan
| | - Takenori Yamauchi
- Department of Hygiene and Preventive Medicine, School of Medicine, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Yuki Otomo
- Department of Medical Risk Management, Graduate School of Risk and Crisis Management, Chiba Institute of Science, 15-8 Shiomi-cho, Choshi, Chiba, 288-0025, Japan
| | - Motofumi Miura
- Laboratory of Molecular Chemistry, School of Pharmacy, Nihon University, 7-7-1 Narashinodai, Funabashi, Chiba, 274-8555, Japan
| | - Kenzo Yamanaka
- Laboratory of Environmental Toxicology and Carcinogenesis, School of Pharmacy, Nihon University, 7-7-1 Narashinodai, Funabashi, Chiba, 274-8555, Japan
| | - Yuko Yamano
- Department of Hygiene and Preventive Medicine, School of Medicine, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Noboru Fujitani
- Biomedical Science Examination and Research Center, Okayama University of Science, 1-3 Ikoino-oka, Imabari, Ehime, 794-8555, Japan
| | - Ginji Endo
- Osaka Occupational Health Service Center, Japan Industrial Safety and Health Association, 2-3-8 Tosabori, Nishi-ku, Osaka, 550-0001, Japan
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HASHIMOTO S, Yamano Y, Tomokazu M, Hidehito Y. SAT-057 Fundamental study of arteriovenous fistula blood flow using transit time flow measurement. Kidney Int Rep 2019. [DOI: 10.1016/j.ekir.2019.05.080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Okubo S, Yamauchi T, Yamano Y. [Changes in the number of female presentations at the annual meeting of the Japan Society for Occupational Health]. Sangyo Eiseigaku Zasshi 2019; 61:108-114. [PMID: 30867340 DOI: 10.1539/sangyoeisei.2018-029-s] [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: 06/09/2023]
Affiliation(s)
- Shigeko Okubo
- Department of Hygiene and Preventive Medicine, School of Medicine, Showa University
| | - Takenori Yamauchi
- Department of Hygiene and Preventive Medicine, School of Medicine, Showa University
| | - Yuko Yamano
- Department of Hygiene and Preventive Medicine, School of Medicine, Showa University
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Nagashima D, Zhang L, Kitamura Y, Ichihara S, Watanabe E, Zong C, Yamano Y, Sakurai T, Oikawa S, Ichihara G. Proteomic analysis of hippocampal proteins in acrylamide-exposed Wistar rats. Arch Toxicol 2019; 93:1993-2006. [DOI: 10.1007/s00204-019-02484-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 05/15/2019] [Indexed: 01/08/2023]
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Yamauchi T, Takeuchi S, Yamano Y, Kuroda Y, Nakadate T. Estimation of the effective reproduction number of influenza based on weekly reports in Miyazaki Prefecture. Sci Rep 2019; 9:2539. [PMID: 30796315 PMCID: PMC6384943 DOI: 10.1038/s41598-019-39057-w] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 01/14/2019] [Indexed: 11/22/2022] Open
Abstract
In Japan, as part of surveillance for seasonal influenza, the number of patients per influenza sentinel site is counted on a weekly basis. Currently, reference values are set for the weekly reported number of influenza cases per sentinel, and pre-epidemic and epidemic warnings are issued based on these values. In this study, we examined the association between these reference values and the effective reproduction number (Rt) using surveillance data for Miyazaki Prefecture collected from 2010 to 2011. There are nine public health centre jurisdictions in this prefecture, and Rt exceeded 1.0 at the time when pre-epidemic warnings were issued in almost all the jurisdictions. Thus, it was indicated that the validity of the reference value was also high for influenza transmission. However, our results indicated the presence of secondary epidemic caused by infections originating both from other jurisdictions and inner jurisdictions, and it is occasionally not possible to evaluate the end of an epidemic in a jurisdiction using only the reference value of termination. It is necessary to establish new methods after considering the situation in the surrounding jurisdictions for more detailed epidemic predictions.
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Affiliation(s)
- Takenori Yamauchi
- Department of Hygiene, Public Health and Preventive Medicine Showa University, School of Medicine, Tokyo, Japan.
| | - Shouhei Takeuchi
- Department of Nutrition Science, Faculty of Nursing and Nutrition, University of Nagasaki, Nagasaki, Japan
| | - Yuko Yamano
- Department of Hygiene, Public Health and Preventive Medicine Showa University, School of Medicine, Tokyo, Japan
| | - Yoshiki Kuroda
- Department of Public Health, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Toshio Nakadate
- Department of Hygiene, Public Health and Preventive Medicine Showa University, School of Medicine, Tokyo, Japan
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Nakadate T, Yamano Y, Yamauchi T, Okubo S, Nagashima D. Assessing the chronic respiratory health risk associated with inhalation exposure to powdered toner for printing in actual working conditions: a cohort study on occupationally exposed workers over 10 years. BMJ Open 2018; 8:e022049. [PMID: 30341118 PMCID: PMC6196812 DOI: 10.1136/bmjopen-2018-022049] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Little epidemiological evidence exists regarding the chronic respiratory effects of inhaled powdered toner exposure in humans, although several case reports have suggested the existence of lung disorders that might be related to exposure to toner dust. OBJECTIVE We aimed to estimate the chronic health risk to humans associated with routine toner dust exposure in copier industry workers under current actual work conditions. DESIGN A prospective observational cohort study of occupational population. METHODS Changes in chest radiogram, spirometry measurements and serum and urine biomarkers of biomedical responses to extrinsic stress, as well as subjective symptoms were longitudinally observed for up to 10 years in Japanese copier industry workers responsible for the manufacturing, maintenance or recycling of powdered toner or toner-using machines. A total of 694 subjects who did not change their work category during the follow-up and were free from chronic respiratory diseases at the baseline survey provided reliable results on at least three survey occasions during 3 years or more of follow-up. RESULTS Typical fibrosis findings associated with pneumoconiosis was not observed on chest radiograms. No significant differences associated with toner exposure were noted in the frequency of new incidence of either non-specific findings on chest radiogram or serum fibrosis biomarkers (sialylated carbohydrate antigen KL-6 and surfactant protein D). However, the exposed subjects tended to show increases in the frequency of respiratory symptoms and reduced spirometry results during the follow-up compared with the control group, although significant differences were only seen in chronic cough. CONCLUSIONS Under the current reasonably controlled work environmental conditions, lung fibrotic changes caused by inhaled dust exposure, including powdered toner, appear to be relatively uncommon; however, non-specific temporal irritation causing subjective symptoms and inflammatory responses might exist.
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Affiliation(s)
- Toshio Nakadate
- Department of Hygiene, Public Health, and Preventive Medicine, Showa University School of Medicine, Tokyo, Japan
| | - Yuko Yamano
- Department of Hygiene, Public Health, and Preventive Medicine, Showa University School of Medicine, Tokyo, Japan
| | - Takenori Yamauchi
- Department of Hygiene, Public Health, and Preventive Medicine, Showa University School of Medicine, Tokyo, Japan
| | - Shigeko Okubo
- Department of Hygiene, Public Health, and Preventive Medicine, Showa University School of Medicine, Tokyo, Japan
| | - Daichi Nagashima
- Department of Hygiene, Public Health, and Preventive Medicine, Showa University School of Medicine, Tokyo, Japan
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19
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Araki A, Azuma K, Endo G, Endo Y, Fukushima T, Hara K, Hori H, Horie S, Horiguchi H, Ichiba M, Ichihara G, Ikeda M, Ishitake T, Ito A, Ito Y, Iwasawa S, Kakumu T, Kamijima M, Karita K, Katoh T, Kawai T, Kawamoto T, Kumagai S, Kusaka Y, Matsumoto A, Miyagawa M, Miyauchi H, Morimoto Y, Nagano K, Naito H, Nakajima T, Nakano M, Nomiyama T, Okuda H, Okuda M, Omae K, Sakurai H, Sato K, Sobue T, Suwazono Y, Takebayashi T, Takeshita T, Takeuchi A, Takeuchi A, Tanaka M, Tanaka S, Tsukahara T, Tsunoda M, Ueno S, Ueyama J, Umeda Y, Yamamoto K, Yamano Y, Yamauchi T, Yano E. Occupational Exposure Limits for ethylidene norbornene, ethyleneimine, benomyl, and 2,3-epoxypropyl methacrylate, and classifications on carcinogenicity. J Occup Health 2018; 60:333-335. [PMID: 29984740 PMCID: PMC6078844 DOI: 10.1539/joh.2018-0137-op] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
| | | | | | - Ginji Endo
- Japan Industrial Safety and Health Association
| | | | | | - Kunio Hara
- University of Occupational and Environmental Health
| | - Hajime Hori
- University of Occupational and Environmental Health
| | - Seichi Horie
- University of Occupational and Environmental Health
| | | | | | | | | | | | - Akiyoshi Ito
- University of Occupational and Environmental Health
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Susumu Ueno
- University of Occupational and Environmental Health
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20
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Koda M, Iwasaki M, Yamano Y, Lu X, Katoh T. Correction to: Association between NAT2, CYP1A1, and CYP1A2 genotypes, heterocyclic aromatic amines, and prostate cancer risk: a case control study in Japan. Environ Health Prev Med 2018; 23:30. [PMID: 29973138 PMCID: PMC6033284 DOI: 10.1186/s12199-018-0718-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Masahide Koda
- Department of Public Health, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjou, Chuo-ku, Kumamoto, 860-8556, Japan.
| | - Motoki Iwasaki
- Division of Epidemiology, Center for Public Health Sciences, National Cancer Center, Tokyo, Japan
| | - Yuko Yamano
- Department of Hygiene and Preventive Medicine, Showa University School of Medicine, Tokyo, Japan
| | - Xi Lu
- Department of Public Health, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjou, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Takahiko Katoh
- Department of Public Health, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjou, Chuo-ku, Kumamoto, 860-8556, Japan
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21
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Koda M, Iwasaki M, Yamano Y, Lu X, Katoh T. Association between NAT2, CYP1A1, and CYP1A2 genotypes, heterocyclic aromatic amines, and prostate cancer risk: a case control study in Japan. Environ Health Prev Med 2017; 22:72. [PMID: 29165164 PMCID: PMC5664586 DOI: 10.1186/s12199-017-0681-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 10/17/2017] [Indexed: 02/06/2023] Open
Abstract
Background Heterocyclic aromatic amines (HAAs) may confer prostate cancer risk; however, the evidence is inconclusive and the activity of HAA-metabolizing enzymes is modulated by gene variants. The purpose of our study was to determine whether there was evidence of an association between HAA intake, polymorphisms in NAT2, CYP1A1, and CYP1A2 and prostate cancer risk in Japanese men. Methods Secondary data analysis of an observational case control study was performed. Among 750 patients with prostate cancer and 870 healthy controls, 351 cases and 351 age-matched controls were enrolled for analysis. HAA intake was estimated using a food frequency questionnaire and genotypes were scored by TaqMan real-time PCR assay. Logistic regression analysis was conducted according to affected/control status. Results We found that high HAA intake was significantly associated with an increased risk of prostate cancer (odds ratio (OR), 1.90; 95% confidence interval (95% CI), 1.40–2.59). The increased risk of prostate cancer was observed among individuals with the NAT2 slow acetylator phenotype (OR, 1.65; 95% CI, 1.04–2.61), CYP1A1 GA + GG genotype (OR, 1.27; 95% CI, 1.02–1.59), and CYP1A2 CA + AA genotype (OR, 1.43; 95% CI, 1.03–2.00). In addition, CYP1A1 GA + GG genotypes were associated with increased cancer risk in low (OR, 2.05; 95% CI, 1.19–3.63), moderate (OR, 1.72; 95% CI, 1.07–2.76), and high (OR, 2.86; 95% CI, 1.83–4.47) HAA intake groups. Conclusions Our results suggest that high HAA intake is a risk factor of prostate cancer, and genotypes related to HAA metabolic enzymes can modulate the degree of the risk.
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Affiliation(s)
- Masahide Koda
- Department of Public Health, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjou, Chuo-ku, Kumamoto, 860-8556, Japan.
| | - Motoki Iwasaki
- Division of Epidemiology, Center for Public Health Sciences, National Cancer Center, Tokyo, Japan
| | - Yuko Yamano
- Department of Hygiene and Preventive Medicine, Showa University School of Medicine, Tokyo, Japan
| | - Xi Lu
- Department of Public Health, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjou, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Takahiko Katoh
- Department of Public Health, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjou, Chuo-ku, Kumamoto, 860-8556, Japan
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22
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Yamano Y, Sato T, Coler-Reilly A, Yagishita N, Araya N, Inoue E, Furuta R, Watanabe T, Uchimaru K, Matsuoka M, Matsumoto N, Hasegawa Y. Phase 1/2a study of Mogamulizumab, an anti-CCR4 monoclonal antibody, in patients with HTLV-1-associated myelopathy (HAM/TSP). J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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23
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Azuma K, Endo G, Endo Y, Fukushima T, Hara K, Hori H, Horie S, Horiguchi H, Ichiba M, Ichihara G, Ikeda M, Ishitake T, Ito A, Ito Y, Iwasawa S, Kamijima M, Karita K, Katoh T, Kawai T, Kawamoto T, Kishi R, Kumagai S, Kusaka Y, Matsumoto A, Miyagawa M, Miyauchi H, Morimoto Y, Nagano K, Naito H, Nakajima T, Nomiyama T, Okuda H, Omae K, Sakurai H, Sato K, Sobue T, Suwazono Y, Takebayashi T, Takeshita T, Takeuchi A, Takeuchi A, Tanaka M, Tanaka S, Tsukahara T, Tsunoda M, Ueno S, Ueyama J, Umeda Y, Yamano Y, Yamauchi T, Yano E. Occupational exposure limits for ethylene glycol monobutyl ether, isoprene, isopropyl acetate and propyleneimine, and classifications on carcinogenicity, occupational sensitizer and reproductive toxicant. J Occup Health 2017; 59:364-366. [PMID: 28652547 PMCID: PMC5557825 DOI: 10.1539/joh.17-0148-op] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
| | | | - Ginji Endo
- Japan Industrial Safety and Health Association
| | | | | | | | - Hajime Hori
- University of Occupational and Environmental Health, Japan
| | - Seichi Horie
- University of Occupational and Environmental Health, Japan
| | | | | | | | | | | | - Akiyoshi Ito
- University of Occupational and Environmental Health, Japan
| | | | | | | | | | | | | | | | | | - Shinji Kumagai
- University of Occupational and Environmental Health, Japan
| | | | | | | | | | - Yasuo Morimoto
- University of Occupational and Environmental Health, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Susumu Ueno
- University of Occupational and Environmental Health, Japan
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24
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Azuma K, Endo G, Endo Y, Hara K, Harada K, Hori H, Horie S, Horiguchi H, Ichiba M, Ichihara G, Ikeda M, Ishitake T, Ito A, Iwasawa S, Kamijima M, Karita K, Kawai T, Kawamoto T, Koizumi A, Kumagai S, Kusaka Y, Miyagawa M, Morimoto Y, Nagano K, Nasu T, Nomiyama T, Omae K, Sato K, Okuda H, Sakurai H, Sobue T, Suwazono Y, Takebayashi T, Takeshita T, Takeuchi A, Tanaka M, Tanaka S, Tsukahara T, Tsunoda M, Ueno S, Yamano Y, Yamauchi T, Yano E. Occupational Exposure Limits of lead, dimethylamine, n-butyl-2,3-epoxypropyl ether, and 2-ethyl-1-hexanol and carcinogenicity and occupational sensitizer classification. J Occup Health 2016; 58:385-7. [PMID: 27476813 PMCID: PMC5356935 DOI: 10.1539/joh.16-0155-op] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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25
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Minami M, Katsumata M, Miyake K, Inagaki H, Fan XH, Kubota H, Yamano Y, Kimura O. Dangerous Mixture of Household Detergents in an Old-style Toilet: a Case Report with Simulation Experiments of the Working Environment and Warning of Potential Hazard Relevant to the General Environment. Hum Exp Toxicol 2016; 11:27-34. [PMID: 1354456 DOI: 10.1177/096032719201100104] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A housewife cleaned toilet porcelain connected directly to a sewage storage tank with a mixture of cleaning agents; sodium hypochlorite (NaOCl) and hydrochloric acid (HCl) solutions. She complained of insomnia on the night after cleaning and suffered from severe metabolic acidosis with extremely low blood pH, PCO2 and bicarbonate values. She recovered from the acidosis after bicarbonate transfusion, plasmapheresis and plasma exchange. Permanent blindness ensued, however, from the third day after the event. These clinical symptoms suggested that the toxic substances responsible were chloramine and methyl chloride. Their generation was confirmed by in-vitro experiments, mixing NaOCl, HCl and pooled urine from normal people. In the simulation, the methyl chloride level far exceeded (100 000 ppm) the maximal allowable concentration recommended (ca 400 ppm) by the American Conference of Governmental Industrial Hygienists (ACGIH). Chloramine's toxic actions were confirmed using purified enzyme assay, and the inhibition of carbonic anhydrase and aldehyde dehydrogenase and the enhancement of superoxide dismutase activity were confirmed in neutral pH. The patient's clinical symptoms suggested that insomnia and permanent blindness seemed to be partly ascribable to chronic repetitive exposure to methyl chloride; catching a cold, drug intake and alcohol intake, in addition, precipitated the patient's visual loss. The possibility of this kind of intoxication with such a mixture of agents may lie latent in any situation where sewage or garbage are exposed to the open air.
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Affiliation(s)
- M Minami
- Department of Hygiene and Public Health, Nippon Medical School, Tokyo, Japan
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26
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Hanada M, Kojima A, Tobari H, Nishikiori R, Hiratsuka J, Kashiwagi M, Umeda N, Yoshida M, Ichikawa M, Watanabe K, Yamano Y, Grisham LR. Development of the negative ion beams relevant to ITER and JT-60SA at Japan Atomic Energy Agency. Rev Sci Instrum 2016; 87:02B322. [PMID: 26932050 DOI: 10.1063/1.4934584] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In order to realize negative ion sources and accelerators to be applicable to International Thermonuclear Experimental Reactor and JT-60 Super Advanced, a large cesium (Cs)-seeded negative ion source and a multi-aperture and multi-stage electric acceleration have been developed at Japan Atomic Energy Agency (JAEA). Long pulse production and acceleration of the negative ion beams have been independently carried out. The long pulse production of the high current beams has achieved 100 s at the beam current of 15 A by modifying the JT-60 negative ion source. The pulse duration time is increased three times longer than that before the modification. As for the acceleration, a pulse duration time has been also extended two orders of magnitudes from 0.4 s to 60 s. The developments of the negative ion source and acceleration at JAEA are well in progress towards the realization of the negative ion sources and accelerators for fusion applications.
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Affiliation(s)
- M Hanada
- Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan
| | - A Kojima
- Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan
| | - H Tobari
- Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan
| | - R Nishikiori
- Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan
| | - J Hiratsuka
- Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan
| | - M Kashiwagi
- Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan
| | - N Umeda
- Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan
| | - M Yoshida
- Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan
| | - M Ichikawa
- Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan
| | - K Watanabe
- Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan
| | - Y Yamano
- Saitama University, Saitama, Saitama-ken 338-8570, Japan
| | - L R Grisham
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
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27
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Kojima A, Hanada M, Tobari H, Nishikiori R, Hiratsuka J, Kashiwagi M, Umeda N, Yoshida M, Ichikawa M, Watanabe K, Yamano Y, Grisham LR. Development of design technique for vacuum insulation in large size multi-aperture multi-grid accelerator for nuclear fusion. Rev Sci Instrum 2016; 87:02B304. [PMID: 26932032 DOI: 10.1063/1.4931803] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Design techniques for the vacuum insulation have been developed in order to realize a reliable voltage holding capability of multi-aperture multi-grid (MAMuG) accelerators for fusion application. In this method, the nested multi-stage configuration of the MAMuG accelerator can be uniquely designed to satisfy the target voltage within given boundary conditions. The evaluation of the voltage holding capabilities of each acceleration stages was based on the previous experimental results about the area effect and the multi-aperture effect. Since the multi-grid effect was found to be the extension of the area effect by the total facing area this time, the total voltage holding capability of the multi-stage can be estimated from that per single stage by assuming the stage with the highest electric field, the total facing area, and the total apertures. By applying these consideration, the analysis on the 3-stage MAMuG accelerator for JT-60SA agreed well with the past gap-scan experiments with an accuracy of less than 10% variation, which demonstrated the high reliability to design MAMuG accelerators and also multi-stage high voltage bushings.
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Affiliation(s)
- A Kojima
- Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan
| | - M Hanada
- Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan
| | - H Tobari
- Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan
| | - R Nishikiori
- Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan
| | - J Hiratsuka
- Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan
| | - M Kashiwagi
- Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan
| | - N Umeda
- Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan
| | - M Yoshida
- Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan
| | - M Ichikawa
- Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan
| | - K Watanabe
- Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan
| | - Y Yamano
- Saitama University, Saitama, Saitama-ken 338-8570, Japan
| | - L R Grisham
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
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28
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Kurosawa H, Shimoda Y, Miura M, Kato K, Yamanaka K, Hata A, Yamano Y, Endo Y, Endo G. A novel metabolic activation associated with glutathione in dimethylmonothioarsinic acid (DMMTA(V))-induced toxicity obtained from in vitro reaction of DMMTA(V) with glutathione. J Trace Elem Med Biol 2016; 33:87-94. [PMID: 26653748 DOI: 10.1016/j.jtemb.2015.10.002] [Citation(s) in RCA: 10] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 09/02/2015] [Accepted: 10/13/2015] [Indexed: 10/22/2022]
Abstract
The purpose of the present study was to elucidate the metabolic processing of dimethylmonothioarsinic acid (DMMTA(V)), which is a metabolite of inorganic arsenic and has received a great deal of attention recently due to its high toxicity. The metabolites produced from an in vitro reaction with GSH were analyzed by high performance liquid chromatography-time of flight mass spectrometer (HPLC-TOFMS), HPLC with a photodiode array detector (PDA), and also gas chromatography-mass spectrometry (GC-MS) and GC with a flame photometric detector (FPD). The reaction of dimethylarsinic acid (DMA(V)) with GSH did not generate DMA(V)-SG but did generate dimethylarsinous acid (DMA(III)) or DMA(III)-SG. On the contrary, we confirmed that the reaction of DMMTA(V) with GSH directly produced the stable complex of DMMTA(V)-SG without reduction through a trivalent dimethylated arsenic such as DMA(III) and DMA(III)-SG. Furthermore, the present study suggests the production of hydrogen sulfide (H2S) and dimethylmercaptoarsine (DMA(III)-SH), a trivalent dimethylated arsenic, as well as DMA(III) and DMA(III)-SG in the decomposition process of DMMTA(V)-SG. These results indicate that the toxicity of DMMTA(V) depends not only on the formation of DMA(III) but also on at least those of H2S and DMA(III)-SH.
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Affiliation(s)
- Hidetoshi Kurosawa
- Laboratory of Environmental Toxicology and Carcinogenesis, Nihon University School of Pharmacy, Chiba 274-8555, Japan; Criminal Investigation Laboratory, Metropolitan Police Department, Tokyo 100-8929, Japan
| | - Yasuyo Shimoda
- Laboratory of Environmental Toxicology and Carcinogenesis, Nihon University School of Pharmacy, Chiba 274-8555, Japan
| | - Motofumi Miura
- Laboratory of Molecular Chemistry, Nihon University School of Pharmacy, Chiba 274-8555, Japan
| | - Koichi Kato
- Laboratory of Environmental Toxicology and Carcinogenesis, Nihon University School of Pharmacy, Chiba 274-8555, Japan
| | - Kenzo Yamanaka
- Laboratory of Environmental Toxicology and Carcinogenesis, Nihon University School of Pharmacy, Chiba 274-8555, Japan.
| | - Akihisa Hata
- Department of Medical Risk Management, Graduate School of Risk and Crisis Management, Chiba Institute of Science, Chiba 288-0025, Japan
| | - Yuko Yamano
- Department of Hygiene and Preventive Medicine, School of Medicine, Showa University, 142-8555, Japan
| | - Yoko Endo
- Research Center for Occupational Poisoning, Kansai Rosai Hospital, Hyogo 660-8511, Japan
| | - Ginji Endo
- Department of Preventive Medicine and Environmental Health, Graduate School of Medicine, Osaka City University, Osaka 545-8585, Japan
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29
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Lu X, Yamano Y, Takahashi H, Koda M, Fujiwara Y, Hisada A, Miyazaki W, Katoh T. Associations between estrogen receptor genetic polymorphisms, smoking status, and prostate cancer risk: a case-control study in Japanese men. Environ Health Prev Med 2015; 20:332-7. [PMID: 26251204 DOI: 10.1007/s12199-015-0471-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 05/16/2015] [Indexed: 10/23/2022] Open
Abstract
OBJECTIVE Prostate cancer (PCa) is one of the major causes of death among men. Our study investigated the association of ESR1 and ESR2 genotypes with susceptibility to PCa in relation to smoking status in Japanese. METHOD A case-control study was performed with 750 Japanese prostate cancer patients and 870 healthy controls. After age-matching in case-controls, 352 controls and 352 cases were enrolled in this study. By using logistic regression analysis, the different genotypes from ESR1 and ESR2 were analyzed according to case/control status. RESULT ESR2 rs4986938 AG and AG + AA genotypes were associated with significantly decreased risk of PCa (AG: OR = 0.68, 95 % CI 0.47-0.97, P < 0.05 and AG + AA: OR = 0.67, 95 % CI 0.47-0.94, P < 0.05). However, there was no significant association between ESR1 rs2234693 and PCa risk. When patients were grouped according to smoking status, the ESR2 rs1256049 AA genotype (OR = 0.48, 95 % CI 0.25-0.95, P < 0.05) and ESR2 rs4986938 AG + AA genotype (OR = 0.64, 95 % CI 0.41-1.00, P < 0.05) showed significantly decreased PCa risk in the ever-smoker group. CONCLUSION Our results suggest that the estrogen receptor ESR2 has a very important function to predict PCa and that different SNPs have different predictive values. Smoking may influence estrogenic activity and may influence PCa together with the estrogen receptor.
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Affiliation(s)
- Xi Lu
- Department of Public Health, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-Ku, Kumamoto, 860-8556, Japan,
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Yamano Y, Miyakawa S, Nakadate T. Association of arteriosclerosis index and oxidative stress markers in school children. Pediatr Int 2015; 57:449-54. [PMID: 25442064 DOI: 10.1111/ped.12545] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 08/29/2014] [Accepted: 11/17/2014] [Indexed: 01/01/2023]
Abstract
BACKGROUND Recent years have seen increased numbers of children with conditions that contribute strongly to atherosclerotic disease, such as passive smoking, obesity, and dyslipidemia. In the present study, we evaluated the utility of non-invasive urinary markers in preventing lifestyle-related diseases by comparing lipid metabolism-related parameters with oxidative stress markers in school children. METHODS Subjects were 85 first-grade students. The variables examined included the smoking in subjects' household; exercise habits; height and weight; blood pressure; and plasma total cholesterol, high-density lipoprotein cholesterol, triglyceride, leptin, blood sugar, urinary cotinine, 8-hydroxy-2'-deoxyguanosine (8-OHdG), and 8-isoprostaglandin F2α (IsoP). RESULTS Of the subjects, 10.6% were obese (% overweight ≥ 20%), 3.5% had a high-risk arteriosclerosis index (AI; 3 ≤ AI < 5), and 29.4% were passive smokers. No significant differences were seen between boys and girls for any of the measurement parameters. Both urinary 8-OHdG (6.8-24.5 ng/mg creatinine) and IsoP (0.9-7.4 ng/mg creatinine) were detected in all subjects, and a significant positive correlation was seen between the two markers. On multiple regression analysis using AI as an objective variable and all non-invasive markers as explanatory variables, urinary IsoP correlated most strongly with AI (P ≤ 0.01). CONCLUSIONS Risk factors for atherosclerosis in adults, such as obesity and hypercholesterolemia, are associated with oxidative stress and inflammation. The present findings of the strongest correlation between urinary IsoP and AI suggest that urinary IsoP may serve as a non-invasive and effective early marker in predicting risk in children of developing lifestyle-related diseases.
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Affiliation(s)
- Yuko Yamano
- Department of Hygiene and Preventive Medicine, Showa University School of Medicine, Tokyo, Japan
| | - Sanpei Miyakawa
- Department of Child Studies, Division of Child Studies, Seitoku University, Chiba, Japan
| | - Toshio Nakadate
- Department of Hygiene and Preventive Medicine, Showa University School of Medicine, Tokyo, Japan
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Yamauchi T, Yamano Y, Yamanaka K, Hata A, Nakadate T, Kuroda Y, Endo Y, Endo G. Possible production of arsenic hemoglobin adducts via exposure to arsine. J Occup Health 2015; 57:161-8. [PMID: 25735624 DOI: 10.1539/joh.14-0148-oa] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVES Arsine is an arsenic compound generated as a by-product in metal refineries. Accidental poisoning occurs sporadically; however, the administrative level for workers has not been established. Thus, it is essential to identify a highly specific biomarker for risk management in the workplace. The aim of this study was to identify an arsenic adduct, a potential biomarker, in the plasma. METHODS Preserved mouse blood was exposed to arsine in vitro, and the plasma was separated. The residual clot of the control sample was hemolyzed using ultrapure water, and the supernatant was collected. Plasma from mice exposed to arsine in vivo was also separated from blood. Immunoprecipitation assays were conducted using all samples after ultrafiltration, and three fractions were collected. The total arsenic concentration in each fraction was quantified using inductively coupled plasma mass spectrometry (ICP-MS). The three in vitro samples and the eluate fraction from immunoprecipitation were analyzed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS). RESULTS In the exposed samples, the arsenic concentration in the fraction containing immunocomplexes was higher when immunoprecipitation was conducted with an anti-globin antibody. Three peaks were specifically observed in arsine-exposed samples after MALDI-TOF-MS analysis. Two of them were around m/z 15,000, and the other was m/z 15,700. The latter peak was confirmed even after immunoprecipitation. CONCLUSIONS Globin forms an adduct with arsenic after both in vitro and in vivo exposure to arsine. This adduct together with hemoglobinuria could be a candidate biomarker of acute arsine poisoning in plasma.
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Affiliation(s)
- Takenori Yamauchi
- Department of Public Health Faculty of Medicine, University of Miyazaki
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Kato K, Yamanaka K, Shimoda Y, Yamano Y, Nagano K, Hata A, Endo Y, Tachikawa M, Endo G. Arsine toxicity is induced by inhalation but not by percutaneous exposure in hairless mice. J Toxicol Sci 2014; 39:301-10. [DOI: 10.2131/jts.39.301] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Koichi Kato
- Laboratory of Environmental Toxicology and Carcinogenesis, School of Pharmacy, Nihon University
| | - Kenzo Yamanaka
- Laboratory of Environmental Toxicology and Carcinogenesis, School of Pharmacy, Nihon University
| | - Yasuyo Shimoda
- Laboratory of Environmental Toxicology and Carcinogenesis, School of Pharmacy, Nihon University
| | - Yuko Yamano
- Department of Hygiene and Preventive Medicine, School of Medicine, Showa University
| | | | - Akihisa Hata
- Division of Clinical Laboratory Science, Department of Environmental Security System, Faculty of Risk and Crisis Management, Chiba Institute of Science
| | - Yoko Endo
- Research Center for Occupational Poisoning, Kansai Rosai Hospital
| | - Mariko Tachikawa
- Laboratory of Environmental Toxicology and Carcinogenesis, School of Pharmacy, Nihon University
| | - Ginji Endo
- Department of Preventive Medicine and Environmental Health, Graduate School of Medicine, Osaka City University
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Yamano Y, Hara K, Ichiba M, Hanaoka T, Pan G, Nakadate T. Urinary 1-hydroxypyrene as a comprehensive carcinogenic biomarker of exposure to polycyclic aromatic hydrocarbons: a cross-sectional study of coke oven workers in China. Int Arch Occup Environ Health 2013; 87:705-13. [DOI: 10.1007/s00420-013-0913-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Accepted: 10/02/2013] [Indexed: 12/15/2022]
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Tsutsumi A, Kagawa J, Yamano Y, Nakadate T, Shimizu S. Relation between cotinine in the urine and indices based on self-declared smoking habits. Environ Health Prev Med 2012; 6:240-7. [PMID: 21432341 DOI: 10.1007/bf02897976] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2001] [Accepted: 08/06/2001] [Indexed: 11/30/2022] Open
Abstract
OBJECTIVES The reliability of surveys on smoking habits based on questionnaires was investigated, using the urinary cotinine content as an objective index. METHODS The subjects tested were 2,849 office workers of middle age, who responded to questions concerning their smoking status, and also their urinary cotinine was measured by the HPLC method. RESULTS The boundary value between smokers and non-smokers, determined by the histogram independent of the questionnaire, was 63.1 and 79.4 ng/mg of creatinine for males and females, respectively. The rate of misclassification of the non-smokers and former smokers as smokers was 1.3% for males and 1.8% for females, whereas that of current smokers as non-smokers was 6.3% and 2.1%. We also assessed the effect of smoke inhalation on the urinary cotinine value, and found a significant difference for males in the cotinine value by the presence of inhalation and also its depth. CONCLUSIONS The rate of misclassification in this study was considered to be comparatively low. Several studies have also assessed the reliability of the questionnaire on smoking habits, and found different misclassification rates, indicating the dependence on the race and number of subjects tested. To our knowledge, there were only a few surveys on smoking among large groups, particularly in Japan, such as this one, therefore the results obtained in this study are meaningful.
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Affiliation(s)
- Akiko Tsutsumi
- Department of Hygiene and Public Health, School of Medicine, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, 162-8666, Tokyo, Japan,
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Akamatsu S, Takata R, Haiman CA, Takahashi A, Inoue T, Kubo M, Furihata M, Kamatani N, Inazawa J, Chen GK, Le Marchand L, Kolonel LN, Katoh T, Yamano Y, Yamakado M, Takahashi H, Yamada H, Egawa S, Fujioka T, Henderson BE, Habuchi T, Ogawa O, Nakamura Y, Nakagawa H. Common variants at 11q12, 10q26 and 3p11.2 are associated with prostate cancer susceptibility in Japanese. Nat Genet 2012; 44:426-9, S1. [PMID: 22366784 DOI: 10.1038/ng.1104] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Accepted: 01/12/2012] [Indexed: 12/22/2022]
Abstract
We have previously reported multiple loci associated with prostate cancer susceptibility in a Japanese population using a genome-wide association study (GWAS). To identify additional prostate cancer susceptibility loci, we genotyped nine SNPs that were nominally associated with prostate cancer (P < 1 × 10(-4)) in our previous GWAS in three independent studies of prostate cancer in Japanese men (2,557 individuals with prostate cancer (cases) and 3,003 controls). In a meta-analysis of our previous GWAS and the replication studies, which included a total of 7,141 prostate cancer cases and 11,804 controls from a single ancestry group, three new loci reached genome-wide significance on chromosomes 11q12 (rs1938781; P = 1.10 × 10(-10); FAM111A-FAM111B), 10q26 (rs2252004; P = 1.98 × 10(-8)) and 3p11.2 (rs2055109; P = 3.94 × 10(-8)). We also found suggestive evidence of association at a previously reported prostate cancer susceptibility locus at 2p11 (rs2028898; P = 1.08 × 10(-7)). The identification of three new susceptibility loci should provide additional insight into the pathogenesis of prostate cancer and emphasizes the importance of conducting GWAS in diverse populations.
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Affiliation(s)
- Shusuke Akamatsu
- Laboratory for Biomarker Development, Center for Genomic Medicine, RIKEN, Tokyo, Japan
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Kojima A, Hanada M, Hilmi A, Inoue T, Watanabe K, Taniguchi M, Kashiwagi M, Umeda N, Tobari H, Kobayashi S, Yamano Y, Grisham LR. Vacuum insulation of the high energy negative ion source for fusion application. Rev Sci Instrum 2012; 83:02B117. [PMID: 22380274 DOI: 10.1063/1.3672471] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Vacuum insulation on a large size negative ion accelerator with multiple extraction apertures and acceleration grids for fusion application was experimentally examined and designed. In the experiment, vacuum insulation characteristics were investigated in the JT-60 negative ion source with >1000 apertures on the grid with the surface area of ∼2 m(2). The sustainable voltages varied with a square root of the gap lengths between the grids, and decreased with number of the apertures and with the surface area of the grids. Based on the obtained results, the JT-60SA (super advanced) negative ion source is designed to produce 22 A, 500 keV D(-) ion beams for 100 s.
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Affiliation(s)
- A Kojima
- Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan.
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Pan G, Hanaoka T, Yu L, Na J, Yamano Y, Hara K, Ichiba M, Nakadate T, Kishi R, Wang P, Yin H, Zhang S, Feng Y. Associations between hazard indices of di-n-butylphthalateand di-2-ethylhexylphthalate exposure and serum reproductive hormone levels among occupationally exposed and unexposed Chinese men. ACTA ACUST UNITED AC 2011; 34:e397-406. [DOI: 10.1111/j.1365-2605.2011.01201.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Minami M, Takahashi H, Sasaki T, Matsumoto S, Sakai K, Inagaki H, Yamano Y, Miyake H. The effect of sleep restriction and psychological load on the diurnal metabolic changes in tryptamine-related compounds in human urine. Environ Health Prev Med 2011; 17:87-97. [PMID: 21655926 DOI: 10.1007/s12199-011-0222-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2010] [Accepted: 05/11/2011] [Indexed: 11/25/2022] Open
Abstract
OBJECTIVE The effect of a severely stressful situation (sleep restriction and psychological load) on the diurnal changes in novel tryptamine-related compounds (hydroxydiacetyltryptamine, sulphatoxymelatonin, and dihydromelatonin) was evaluated in human subjects for 16 days. METHODS The subjects were allowed to sleep for 5 h on days three through 12 and for 8 h on the other days. On days three through 12, the subjects were asked to perform a psychological task. The first two and the last 4 days were viewed as control days. A performance test was administered to evaluate the extent of the subjects' fatigue. Total urine was sampled by collecting it into bottles three times a day [(1) during the sleeping period, (2) in the morning, and (3) in the afternoon]. Seven tryptamine-related compounds in urine were assayed using HPLC-fluorometry. RESULTS The urine melatonin level was high at night and low during the day. In contrast, urinary levels of hydroxydiacetyltryptamine and sulphatoxydiacetyltryptamine were low at night and high during the day. Dihydromelatonin was undetectable in urine during the sleeping period. Sleep restriction and psychological load did not affect diurnal changes in urinary melatonin, hydroxydiacetyltryptamine, sulphatoxydiacetyltryptamine, or N-acetylserotonin levels. The concentrations of hydroxymelatonin and sulphatoxymelatonin in urine did not show diurnal changes and decreased gradually during the experimental days. A principal component analysis confirmed the diurnal changes and suggested two novel metabolic pathways: (1) N-acetylserotonin to sulphtoxydiacetyltryptamine via hydroxydiacetyltryptamine, and (2) melatonin to dihydromelatonin. CONCLUSION Severely stressful situations did not affect diurnal changes in melatonin, hydroxydiacetyltryptamine, sulphatoxydiacetyltryptamine, or N-acetylserotonin levels in urine.
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Affiliation(s)
- Masayasu Minami
- Chronic Fatigue Research Center, Institute for Science of Labour, 2-8-14 Sugao, Miyamae-ku, Kawasaki 216-8501, Japan.
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Yamano Y, Tokutake T, Ishizu S, Nakadate T. Occupational exposure in methyl bromide manufacturing workers: 17-year follow-up study of urinary bromide ion concentration for biological monitoring. Ind Health 2010; 49:133-138. [PMID: 20823625 DOI: 10.2486/indhealth.ms1143] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
To elucidate the circumstances of their occupational exposure to methyl bromide (MeBr), we conducted a 17-yr study on 124 workers employed by a MeBr manufacturer. Subjects were classified into three groups according to the nature of their work: synthesis group, filling group, and other group. Urinary concentrations of bromide ion (Br(-)) were assessed, and data attained via MeBr-health examinations were analyzed. The highest Br(-) concentrations were seen in the synthesis group, with a median value of 13.0 μg/mg CRE (2.5-51.8), followed by the filling group, with a concentration of 11.9 μg/mg CRE (3.1-34.8). Both values were significantly higher than the levels noted in the other group (p<0.001). Three major opportunities for exposure were identified: during exchange of reaction equipment for maintenance or cleaning, during operations to adjust for weight variations after filling canisters, or when canisters were recycled. Overall, however, the workplace environment concentration remained largely below the administrative control level throughout the study period. Therefore, while this was a relatively well-controlled workplace, exposure opportunities still arose when performing certain tasks, indicating the need for ongoing improvement in workplace procedures and underscoring the importance of biological monitoring.
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Affiliation(s)
- Yuko Yamano
- Department of Hygiene and Preventive Medicine, Showa University School of Medicine, Tokyo 142-8555, Japan.
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Homma T, Fujimura T, Maki H, Yamano Y, Shimada J, Kuwahara S. In vitro antibacterial activities of S-013420, a novel bicyclolide, against respiratory tract pathogens. J Antimicrob Chemother 2010; 65:1433-40. [DOI: 10.1093/jac/dkq147] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Abstract
BACKGROUND In recent years, a number of studies have reported that exposure to environmental tobacco smoke (ETS) reduces high-density lipoprotein cholesterol (HDL-C) levels in children, as well as in adults. Further, a number of countries have indicated that passive smoking increases the risk of early arteriosclerosis onset. Here, to evaluate the effects of ETS exposure, we conducted a cross-sectional epidemiological study on primary school children in Japan using answers from a questionnaire survey, as well as urine cotinine and lipid metabolism-related variable measurements. METHODS A total of 121 sixth-grade primary school children participated in this study by completing a questionnaire about their food intake, lifestyle and family smoking habits. Early in the morning, we also measured height, weight, blood pressure, serum levels of total cholesterol, triglyceride, HDL-C, and blood sugar, as well as urine levels of cotinine and creatinine under unfed conditions. RESULTS From the questionnaire, 40 and 81 children reported being exposed and not exposed to ETS, respectively. Serum HDL-C levels, which were adjusted for the degree of corpulence and exercise habits, were significantly lower in the passive smoker group than the non-passive-smoker group (65.3 and 72.1 mg/dL, respectively; P= 0.012). In addition, proportional differences in serum HDL-C levels were also observed based on the amount of cigarettes smoked at home by family members of the child. CONCLUSIONS Results suggest that ETS exposure at home is associated in a dose-related manner with lower serum HDL-C levels in primary school children. In addition, our results suggest that smoking in the presence of children who are not usually exposed to ETS increases the risk of arteriosclerosis. Given these findings, we strongly recommend the establishment of anti-passive-smoking measures.
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Affiliation(s)
- Kuniyo Hirata
- Showa University School of Medicine, Hygiene and Preventive Medicine, Tokyo, Japan
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Yamada H, Penney KL, Takahashi H, Katoh T, Yamano Y, Yamakado M, Kimura T, Kuruma H, Kamata Y, Egawa S, Freedman ML. Replication of Prostate Cancer Risk Loci in a Japanese Case–Control Association Study. ACTA ACUST UNITED AC 2009; 101:1330-6. [PMID: 19726753 DOI: 10.1093/jnci/djp287] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Hiroki Yamada
- Department of Urology, Jikei University School ofMedicine, Tokyo, Japan
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Manabe R, Kunugita N, Katoh T, Kuroda Y, Akiyama Y, Yamano Y, Uchiyama I, Arashidani K. [Questionnaire survey of workers in specific buildings regarding multiple chemical sensitivity]. Nihon Eiseigaku Zasshi 2008; 63:717-723. [PMID: 18840946 DOI: 10.1265/jjh.63.717] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
OBJECTIVES The purpose of this study was to investigate the incidence of multiple chemical sensitivity (MCS) and effectiveness of the Quick Environment Exposure and Sensitivity Inventory (QEESI) in Japanese workers in specific buildings. METHODS The survey was performed in 2004-2006 in Japan. QEESI (Japanese version) and a checklist on accumulation of fatigue developed by the Ministry of Health, Labour and Welfare were used in the examination of 410 workers in specific buildings. Three criteria of QEESI's "symptom severity", "chemical intolerance", and "other intolerance" were evaluated in this study. Clinical histories were also surveyed. RESULT Responses were obtained from 368 (89.8%) workers. The results showed that 132 (35.9%) individuals have been diagnosed as having allergy. Only two (0.5%) individuals were found to be MCS patients. There was no sick building syndrome patient. Applying the "high" criteria with QEESI to the standard of Miller and Ashford, we determined that only four (1.1%) individuals met all the three criteria, and 17 (4.6%) individuals met two of the three criteria. The QEESI score of allergy persons was higher than that of nonallergy persons. Among nonallergy persons, those who have a high score on accumulation of fatigue in the checklist showed a high score in QESSI. CONCLUSIONS These findings indicated that the QEESI score tended to increase with workload and be high in individuals with allergy. Therefore, careful consideration is required, when QEESI is applied for screening MCS patients in Japan.
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Affiliation(s)
- Ryuji Manabe
- Division of Public Health, Department of Social Medicine, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
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Manabe R, Kunugita N, Katoh T, Kuroda Y, Akiyama Y, Yamano Y, Uchiyama I, Arashidani K. [Investigation of air pollution in a shopping center and employees' personal exposure level]. Nihon Eiseigaku Zasshi 2008; 63:20-8. [PMID: 18306654 DOI: 10.1265/jjh.63.20] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVES To investigate the concentrations of chemicals found inside a shopping center (SC), we investigated the condition of air pollution in a SC and the personal exposure level of SC employees. METHODS The survey was performed in June 2006 in Kyushu. The chemicals studied were volatile organic compounds (VOCs) and aldehydes. The chemicals were collected by a personal passive sampler. RESULT Thirty-one VOCs and aldehydes were detected inside the SC. The results showed that the concentrations of all the chemicals detected in indoor air were less than those specified in the indoor air quality guideline of Ministry of Health, Labor and Welfare, Japan. The chemical concentrations in the SC decreased in the order of food corner > electric, clothing corner > outdoor and were clearly higher than those outdoors. Therefore, it is thought that the source of chemicals is indoors. The high indoor concentration of 2-ethyl-1-hexanol may be due to diffusion from the walls and floors. In addition, it is suggested that the personal exposure condition of the employees reflected the indoor concentration of each sales floor. The exposure level to formaldehyde was higher at nonworking time than at working time, suggesting that a larger exposure source exists in the place of residence than in the work place. CONCLUSIONS We found that indoor air quality in SC is maintained at good levels. This might be because of the Japanese strict regulations that require administrations of large-scale buildings to provide adequate ventilation and perform regular measurement of indoor air quality.
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Affiliation(s)
- Ryuji Manabe
- Division of Public Health, Department of Social Medicine, Faculty of Medicine, University of Miyazaki
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Abstract
Glutathione S-transferases (GSTs) are involved in the metabolism of a wide range of carcinogenic chemicals. In humans, cytosol GSTs are divided into eight classes: alpha (GSTA), mu (GSTM), pi (GSTP), theta (GSTT), tau (GSTZ), sigma (GSTS), omicron (GSTO) and kappa (GSTK). The allelic polymorphism of these enzymes is associated with variations in enzyme activity; hence, it may affect the concentration of activated carcinogenic chemicals in the body. In addition to the metabolism of chemical carcinogens, GSTs metabolize steroid hormones, compounds in the diet and other agents potentially involved in prostate carcinogenesis. Three genetic polymorphisms of GSTs, GSTM1*0 (null), GSTT1*0 (null) and GSTP1 A313G, have been well documented. No consistent associations between GSTM1, GSTT1 or GSTP1 genotypes and prostate cancer have been observed. Recent meta-analysis reports show that these polymorphisms of GSTM1, GSTT1 and GSTP1 are unlikely to be major determinants of susceptibility to prostate cancer.
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Affiliation(s)
- Takahiko Katoh
- Kumamoto University, Department of Public Health, Graduate school of Medical Sciences, Kumamoto 860-8556, Japan.
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Yamano Y, Takahashi M, Kobayashi S, Hanada M, Ikeda Y. Surface discharge related properties of fiberglass reinforced plastic insulator for use in neutral beam injector of JT-60U. Rev Sci Instrum 2008; 79:02A524. [PMID: 18315145 DOI: 10.1063/1.2828069] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Neutral beam injection (NBI) used for JT-60U is required to generate negative ions of 500 keV energies. To produce such high-energy ions, three-stage electrostatic accelerators consisting of three insulator rings made of fiberglass reinforced plastic (FRP) are applied. The surface discharges along FRP insulators are one of the most serious problems in the development of NBI. To increase the hold-off voltage against surface flashover events, it is necessary to investigate the FRP insulator properties related to surface discharges in vacuum. This paper describes surface flashover characteristics for FRP and alumina samples under vacuum condition. The results show that the fold-off voltages for FRP samples are inferior to those of alumina ceramics. In addition, measurement results of surface resistivity and volume resistivity under vacuum and atmospheric conditions, secondary electron emission characteristics, and cathodoluminescence under some keV electron beam irradiation are also reported. These are important parameters to analyze surface discharge of insulators in vacuum.
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Affiliation(s)
- Y Yamano
- School of Science and Engineering, Saitama University, Japan.
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Tsukino H, Omori H, Kohshi K, Yamano Y, Katoh T. Molecular epidemiology and urothelial cancer. J UOEH 2007; 29:265-89. [PMID: 17900006 DOI: 10.7888/juoeh.29.265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Tobacco smoking is the main cause of human urothelial cancer. It has been suggested that genetic susceptibility may contribute to the risk, because only a small portion of smokers develops urothelial cancer. Tobacco smoke contains many carcinogens which are activated or detoxified by phase-I or phase-II enzymes. The concentration of the ultimate carcinogen, which will react with DNA, is determined by the rate of activation and detoxification. Individuals with an increased rate of activation or a decreased rate of detoxification have a slightly higher level of bulky carcinogen-DNA adduct in the urothelial mucosa. Thus metabolic polymorphisms have been recognized as important determinants of carcinogen susceptibility, and recent efforts have shown that inter-individual differences in specific cytochrome P450 enzymes (CYPs), N-acetyltransferases (NAT), glutathione S-transferases (GST) and sulfotransferases (SULT) are often disproportionately represented in epidemiological studies between urothelial cancer cases and controls. It has been revealed that GSTM1 null genotype or NAT2 slow acetylator genotype may be associated with a small increase in urothelial cancer risk. Associations between other polymorphisms of metabolic enzymes and urothelial cancer are not well-known or are inconsistent. To reveal these associations, further well-designed and large-scale studies are needed.
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Affiliation(s)
- Hiromasa Tsukino
- Department of Urology, Faculty of Medicine, University of Miyazaki, Miyazaki 889-1692, Japan
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Nomura H, Uzawa K, Yamano Y, Fushimi K, Ishigami T, Kato Y, Saito K, Nakashima D, Higo M, Kouzu Y, Ono K, Ogawara K, Shiiba M, Bukawa H, Yokoe H, Tanzawa H. Network-based analysis of calcium-binding protein genes identifies Grp94 as a target in human oral carcinogenesis. Br J Cancer 2007; 97:792-801. [PMID: 17726464 PMCID: PMC2360381 DOI: 10.1038/sj.bjc.6603948] [Citation(s) in RCA: 18] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
To characterise Ca(2+) -binding protein gene expression changes in oral squamous cell carcinomas (OSCCs), we compared the gene expression profiles in OSCC-derived cell lines with normal oral tissues. One hundred Ca(2+) -binding protein genes differentially expressed in OSCCs were identified, and genetic pathways associated with expression changes were generated. Among genes mapped to the network with the highest significance, glucose-regulated protein 94 kDa (Grp94) was evaluated further for mRNA and protein expression in the OSCC cell lines, primary OSCCs, and oral premalignant lesions (OPLs). A significant (P<0.001) overexpression of Grp94 protein was observed in all cell lines compared to normal oral epithelium. Immunohistochemical analysis showed highly expressed Grp94 in primary OSCCs and OPLs, whereas most of the corresponding normal tissues had no protein immunoreaction. Real-time quantitative reverse transcriptase-PCR data agreed with the protein expression status. Moreover, overexpression of Grp94 in primary tumours was significantly (P<0.001) correlated with poor disease-free survival. The results suggested that Grp94 may have potential clinical application as a novel diagnosis and prognostic biomarker for human OSCCs.
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MESH Headings
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Blotting, Western
- Calcium-Binding Proteins/genetics
- Carcinoma, Squamous Cell/drug therapy
- Carcinoma, Squamous Cell/genetics
- Carcinoma, Squamous Cell/pathology
- Cell Line, Tumor
- Disease-Free Survival
- Fluorescent Antibody Technique, Direct
- Gene Expression Profiling
- Gene Expression Regulation, Neoplastic
- Humans
- Immunohistochemistry
- Kaplan-Meier Estimate
- Membrane Glycoproteins/genetics
- Membrane Glycoproteins/metabolism
- Mouth Neoplasms/drug therapy
- Mouth Neoplasms/genetics
- Mouth Neoplasms/pathology
- Neoplasm Staging
- Predictive Value of Tests
- Prognosis
- RNA, Messenger/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Up-Regulation
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Affiliation(s)
- H Nomura
- Department of Clinical Molecular Biology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - K Uzawa
- Department of Clinical Molecular Biology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
- Division of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
- E-mail:
| | - Y Yamano
- Department of Clinical Molecular Biology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - K Fushimi
- Department of Clinical Molecular Biology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - T Ishigami
- Department of Clinical Molecular Biology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - Y Kato
- Department of Clinical Molecular Biology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - K Saito
- Department of Clinical Molecular Biology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - D Nakashima
- Department of Clinical Molecular Biology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - M Higo
- Department of Clinical Molecular Biology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - Y Kouzu
- Department of Clinical Molecular Biology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - K Ono
- Division of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - K Ogawara
- Department of Clinical Molecular Biology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - M Shiiba
- Department of Clinical Molecular Biology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - H Bukawa
- Division of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - H Yokoe
- Division of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - H Tanzawa
- Department of Clinical Molecular Biology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
- Division of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
- Center of Excellence (COE) Program in the 21st Century, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
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Puccioni-Sohler M, Yamano Y, Rios M, Carvalho SMF, Vasconcelos CCF, Papais-Alvarenga R, Jacobson S. Differentiation of HAM/TSP from patients with multiple sclerosis infected with HTLV-I. Neurology 2007; 68:206-13. [PMID: 17224575 DOI: 10.1212/01.wnl.0000251300.24540.c4] [Citation(s) in RCA: 39] [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] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To better differentiate patients with human T lymphotropic virus type I (HTLV-I)-associated myelopathy/tropical spastic paraparesis (HAM/TSP) from patients with multiple sclerosis (MS) who are HTLV-I seropositive, we compared the HTLV-I antibodies and HTLV-I proviral DNA loads in CSF and peripheral blood mononuclear cells (PBMC). METHODS Intrathecal synthesis of HTLV-I antibodies and HTLV-I proviral DNA loads in CSF and PBMC were measured and compared in 39 Brazilian patients: 17 HAM/TSP and 22 HTLV-I-seropositive non-HAM/TSP (7 with other neurologic diseases, 11 asymptomatic carriers, and 4 HTLV-I-seropositive patients with an MS-like phenotype). In addition, we followed immunologic and virologic markers in comparison to the clinical course (by Kurtzke Expanded Disability Status Scale) of seven patients (five with HAM/TSP and two with an MS-like phenotype) for a mean period of 16 (SD +/- 5) months. RESULTS The proviral load in CSF and PBMC was higher in HAM/TSP than in non-HAM/TSP patients, except in the two HTLV-I-seropositive patients with an MS-like phenotype that also fulfilled the criteria for HAM/TSP. Higher HTLV-I proviral DNA load in CSF was associated with the higher proviral DNA load in PBMC and lower intrathecal synthesis of HTLV-I antibodies. These laboratory findings remained stable during follow-up. CONCLUSION The high proviral load in peripheral blood mononuclear cells or in CSF or both may be a good marker of human T lymphotropic virus type I (HTLV-I)-associated myelopathy/tropical spastic paraparesis (HAM/TSP) and can differentiate patients with HAM/TSP from patients with multiple sclerosis infected with HTLV-I.
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Affiliation(s)
- M Puccioni-Sohler
- Neurological Service, Gaffree Guinle University Hospital, Federal University of Rio de Janeiro State, Rio de Janeiro, Brazil.
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Nakadate T, Yamano Y, Adachi C, Kikuchi Y, Nishiwaki Y, Nohara M, Satoh T, Omae K. A cross sectional study of the respiratory health of workers handling printing toner dust. Occup Environ Med 2006; 63:244-9. [PMID: 16556743 PMCID: PMC2078083 DOI: 10.1136/oem.2005.020644] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND Although recent case reports have suggested possible respiratory effects of solid toner dust inhalation, this hypothesis has not been verified by epidemiological studies. OBJECTIVES To conduct a cross sectional study to evaluate the association between the biological indices of lung fibrosis and toner dust exposure in an occupational cohort handling solid toner dust in their work life. METHODS A total of 600 male toner workers and 212 control subjects were surveyed in terms of their subjective respiratory symptoms, pulmonary functions, and chest radiographic findings. In addition to the exposure history, the current working conditions and personal exposure levels to toner dust were also examined. RESULTS Although subjects handling toner for more than 20 years tended to show a higher prevalence of respiratory symptoms and minimal chest x ray abnormalities, there was no consistent relation between the exposure to toner dust and the biological responses of the respiratory system. CONCLUSION Deterioration of respiratory health related to toner dust exposure is less likely to occur in current well controlled work environments, especially if the powdered toner is handled carefully. Nonetheless, it is important to collect further epidemiological evidence on the biological effects of toner dust inhalation, preferably using a longitudinal study design.
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Affiliation(s)
- T Nakadate
- Department of Hygiene, Showa University School of Medicine, Tokyo, Japan.
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