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Zhang Z, Aoki H, Umezawa K, Kranrod J, Miyazaki N, Oshima T, Hirao T, Miura Y, Seubert J, Ito K, Aoki S. Potential role of lipophagy impairment for anticancer effects of glycolysis-suppressed pancreatic ductal adenocarcinoma cells. Cell Death Discov 2024; 10:166. [PMID: 38580661 PMCID: PMC10997792 DOI: 10.1038/s41420-024-01933-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 03/21/2024] [Accepted: 03/25/2024] [Indexed: 04/07/2024] Open
Abstract
Although increased aerobic glycolysis is common in various cancers, pancreatic ductal adenocarcinoma (PDAC) cells can survive a state of glycolysis suppression. We aimed to identify potential therapeutic targets in glycolysis-suppressed PDAC cells. By screening anticancer metabolic compounds, we identified SP-2509, an inhibitor of lysine-specific histone demethylase 1A (LSD1), which dramatically decreased the growth of PDAC PANC-1 cells and showed an anti-tumoral effect in tumor-bearing mice. The growth of glycolysis-suppressed PANC-1 cells was also inhibited by another LSD1 inhibitor, OG-L002. Similarly, the other two PDAC cells (PK-1 and KLM-1) with suppressed glycolysis exhibited anticancer effects against SP-2509. However, the anticancer effects on PDAC cells were unrelated to LSD1. To investigate how PDAC cells survive in a glycolysis-suppressed condition, we conducted proteomic analyses. These results combined with our previous findings suggested that glucose-starvation causes PDAC cells to enhance mitochondrial oxidative phosphorylation. In particular, mitochondrial fatty acid metabolism was identified as a key factor contributing to the survival of PDAC cells under glycolysis suppression. We further demonstrated that SP-2509 and OG-L002 disturbed fatty acid metabolism and induced lipid droplet accumulation through the impairment of lipophagy, but not bulk autophagy. These findings indicate a significant potential association of lipophagy and anticancer effects in glycolysis-suppressed PDAC cells, offering ideas for new therapeutic strategies for PDAC by dual inhibition of glycolysis and fatty acids metabolism.
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Affiliation(s)
- Zhiheng Zhang
- Laboratory of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba-city, Chiba, 260-8675, Japan
| | - Haruna Aoki
- Laboratory of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba-city, Chiba, 260-8675, Japan
| | - Keitaro Umezawa
- Research Team for Mechanism of Aging, Tokyo Metropolitan Institute of Gerontology, 35‑2 Sakae‑cho, Itabashi‑ku, Tokyo, 173‑0015, Japan
| | - Joshua Kranrod
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, 2026-M Katz Group Centre for Pharmacy and Health Research, 11361-97 Ave, Edmonton, AB, T6G 2E1, Canada
| | - Natsumi Miyazaki
- Laboratory of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba-city, Chiba, 260-8675, Japan
| | - Taichi Oshima
- Laboratory of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba-city, Chiba, 260-8675, Japan
| | - Takuya Hirao
- Divisions of Clinical Pharmacokinetics, Department of Pharmaceutical Sciences, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara, Tochigi, 324-8501, Japan
| | - Yuri Miura
- Research Team for Mechanism of Aging, Tokyo Metropolitan Institute of Gerontology, 35‑2 Sakae‑cho, Itabashi‑ku, Tokyo, 173‑0015, Japan
| | - John Seubert
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, 2026-M Katz Group Centre for Pharmacy and Health Research, 11361-97 Ave, Edmonton, AB, T6G 2E1, Canada
- Department of Pharmacology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, T6G 2E1, Canada
| | - Kousei Ito
- Laboratory of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba-city, Chiba, 260-8675, Japan
| | - Shigeki Aoki
- Laboratory of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba-city, Chiba, 260-8675, Japan.
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Miyazaki N, Shiratori R, Oshima T, Zhang Z, Valencia R, Kranrod J, Fang L, Seubert JM, Ito K, Aoki S. PINK1-dependent and Parkin-independent mitophagy is involved in reprogramming of glycometabolism in pancreatic cancer cells. Biochem Biophys Res Commun 2022; 625:167-173. [DOI: 10.1016/j.bbrc.2022.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 08/02/2022] [Indexed: 11/27/2022]
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Uno N, Takata S, Komoto S, Miyamoto H, Nakayama Y, Osaki M, Mayuzumi R, Miyazaki N, Hando C, Abe S, Sakuma T, Yamamoto T, Suzuki T, Nakajima Y, Oshimura M, Tomizuka K, Kazuki Y. Panel of human cell lines with human/mouse artificial chromosomes. Sci Rep 2022; 12:3009. [PMID: 35194085 PMCID: PMC8863800 DOI: 10.1038/s41598-022-06814-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 02/04/2022] [Indexed: 11/25/2022] Open
Abstract
Human artificial chromosomes (HACs) and mouse artificial chromosomes (MACs) are non-integrating chromosomal gene delivery vectors for molecular biology research. Recently, microcell-mediated chromosome transfer (MMCT) of HACs/MACs has been achieved in various human cells that include human immortalised mesenchymal stem cells (hiMSCs) and human induced pluripotent stem cells (hiPSCs). However, the conventional strategy of gene introduction with HACs/MACs requires laborious and time-consuming stepwise isolation of clones for gene loading into HACs/MACs in donor cell lines (CHO and A9) and then transferring the HAC/MAC into cells via MMCT. To overcome these limitations and accelerate chromosome vector-based functional assays in human cells, we established various human cell lines (HEK293, HT1080, hiMSCs, and hiPSCs) with HACs/MACs that harbour a gene-loading site via MMCT. Model genes, such as tdTomato, TagBFP2, and ELuc, were introduced into these preprepared HAC/MAC-introduced cell lines via the Cre-loxP system or simultaneous insertion of multiple gene-loading vectors. The model genes on the HACs/MACs were stably expressed and the HACs/MACs were stably maintained in the cell lines. Thus, our strategy using this HAC/MAC-containing cell line panel has dramatically simplified and accelerated gene introduction via HACs/MACs.
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Affiliation(s)
- Narumi Uno
- Division of Genome and Cellular Functions, Department of Molecular and Cellular Biology, Faculty of Medicine, School of Life Science, Tottori University, 86 Nishi-cho, Yonago, Tottori, 683-8503, Japan.
- Chromosome Engineering Research Center, Tottori University, 86 Nishi-cho, Yonago, Tottori, 683-8503, Japan.
- Laboratory of Bioengineering, Faculty of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachiohji, Tokyo, 192-0392, Japan.
| | - Shuta Takata
- Division of Genome and Cellular Functions, Department of Molecular and Cellular Biology, Faculty of Medicine, School of Life Science, Tottori University, 86 Nishi-cho, Yonago, Tottori, 683-8503, Japan
| | - Shinya Komoto
- Division of Genome and Cellular Functions, Department of Molecular and Cellular Biology, Faculty of Medicine, School of Life Science, Tottori University, 86 Nishi-cho, Yonago, Tottori, 683-8503, Japan
| | - Hitomaru Miyamoto
- Division of Genome and Cellular Functions, Department of Molecular and Cellular Biology, Faculty of Medicine, School of Life Science, Tottori University, 86 Nishi-cho, Yonago, Tottori, 683-8503, Japan
| | - Yuji Nakayama
- Division of Radioisotope Science, Research Initiative Center, Organization for Research Initiative and Promotion, Tottori University, 86 Nishi-cho, Yonago, Tottori, 683-8503, Japan
| | - Mitsuhiko Osaki
- Chromosome Engineering Research Center, Tottori University, 86 Nishi-cho, Yonago, Tottori, 683-8503, Japan
- Division of Experimental Pathology, Department of Biomedical Sciences, Faculty of Medicine, Tottori University, Yonago, Tottori, 683-8503, Japan
| | - Ryota Mayuzumi
- Laboratory of Bioengineering, Faculty of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachiohji, Tokyo, 192-0392, Japan
| | - Natsumi Miyazaki
- Laboratory of Bioengineering, Faculty of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachiohji, Tokyo, 192-0392, Japan
| | - Chiaki Hando
- Laboratory of Bioengineering, Faculty of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachiohji, Tokyo, 192-0392, Japan
| | - Satoshi Abe
- Chromosome Engineering Research Center, Tottori University, 86 Nishi-cho, Yonago, Tottori, 683-8503, Japan
| | - Tetsushi Sakuma
- Division of Integrated Sciences for Life, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Takashi Yamamoto
- Division of Integrated Sciences for Life, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Teruhiko Suzuki
- Stem Cell Project, Tokyo Metropolitan Institute of Medical Science, Kamikitazawa, Setagaya-ku, Tokyo, 156-8506, Japan
| | - Yoshihiro Nakajima
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa, 761-0395, Japan
| | - Mitsuo Oshimura
- Chromosome Engineering Research Center, Tottori University, 86 Nishi-cho, Yonago, Tottori, 683-8503, Japan
| | - Kazuma Tomizuka
- Laboratory of Bioengineering, Faculty of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachiohji, Tokyo, 192-0392, Japan
| | - Yasuhiro Kazuki
- Division of Genome and Cellular Functions, Department of Molecular and Cellular Biology, Faculty of Medicine, School of Life Science, Tottori University, 86 Nishi-cho, Yonago, Tottori, 683-8503, Japan.
- Chromosome Engineering Research Center, Tottori University, 86 Nishi-cho, Yonago, Tottori, 683-8503, Japan.
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Miyazaki N, Kobayashi T, Komiya T, Okada T, Ishida Y, Fukui H, Ogihara Y, Uchino H. Postoperative malignant hyperthermia confirmed by calcium-induced calcium release rate after breast cancer surgery, in which prompt recognition and immediate dantrolene administration were life-saving: a case report. J Med Case Rep 2021; 15:201. [PMID: 33863374 PMCID: PMC8052646 DOI: 10.1186/s13256-021-02681-0] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 01/13/2021] [Indexed: 11/22/2022] Open
Abstract
Background Malignant hyperthermia (MH) is a rare genetic disease characterized by the development of very serious symptoms, and hence prompt and appropriate treatment is required. However, postoperative MH is very rare, representing only 1.9% of cases as reported in the North American Malignant Hyperthermia Registry (NAMHR). We report a rare case of a patient who developed sudden postoperative hyperthermia after mastectomy, which was definitively diagnosed as MH by the calcium-induced calcium release rate (CICR) measurement test. Case presentation A 61-year-old Japanese woman with a history of stroke was hospitalized for breast cancer surgery. General anesthesia was introduced by propofol, remifentanil, and rocuronium. After intubation, anesthesia was maintained using propofol and remifentanil, and mastectomy and muscle flap reconstruction surgery was performed and completed without any major problems. After confirming her spontaneous breathing, sugammadex was administered and she was extubated. Thereafter, systemic shivering and masseter spasm appeared, and a rapid increase in body temperature (maximum: 38.9 °C) and end-tidal carbon dioxide (ETCO2) (maximum: 59 mmHg) was noted. We suspected MH and started cooling the body surface of the axilla, cervix, and body trunk, and administered chilled potassium-free fluid and dantrolene. After her body temperature dropped and her shivering improved, dantrolene administration was ended, and finally she was taken to the intensive care unit (ICU). Body cooling was continued within the target range of 36–37 °C in the ICU. No consciousness disorder, hypotension, increased serum potassium level, metabolic acidosis, or cola-colored urine was observed during her ICU stay. Subsequently, her general condition improved and she was discharged on day 12. Muscle biopsy after discharge was performed and provided a definitive diagnosis of MH. Conclusions The occurrence of MH can be life-threatening, but its frequency is very low, and genetic testing and muscle biopsy are required to confirm the diagnosis. On retrospective evaluation using the malignant hyperthermia scale, the present case was almost certainly that of a patient with MH. Prompt recognition and immediate treatment with dantrolene administration and body cooling effectively reversed a potentially fatal syndrome. This was hence a valuable case of a patient with postoperative MH that led to a confirmed diagnosis by CICR.
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Affiliation(s)
- Natsumi Miyazaki
- Department of Anesthesia, Tokyo Medical University, 6-7-1 Nishi-shinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan
| | - Takayuki Kobayashi
- Department of Anesthesia, Tokyo Medical University, 6-7-1 Nishi-shinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan
| | - Takako Komiya
- Department of Plastic Surgery, Tokyo Medical University, 6-7-1 Nishi-shinjuku, Shinjuku-ku, Tokyo, Japan
| | - Toshio Okada
- Department of Anesthesia, Tokyo Medical University, 6-7-1 Nishi-shinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan
| | - Yusuke Ishida
- Department of Anesthesia, Tokyo Medical University, 6-7-1 Nishi-shinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan
| | - Hidekimi Fukui
- Department of Anesthesia, Tokyo Medical University, 6-7-1 Nishi-shinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan
| | - Yukihiko Ogihara
- Department of Anesthesia, Tokyo Medical University, 6-7-1 Nishi-shinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan.
| | - Hiroyuki Uchino
- Department of Anesthesia, Tokyo Medical University, 6-7-1 Nishi-shinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan
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Watanabe T, Okada H, Kanamori H, Miyazaki N, Tsujimoto A, Nawa T, Tanaka T, Kawasaki M, Fujiwara T, Fujiwara H, Genzou G. P1505In situ nuclear DNA methylation in human failing hearts with dilated cardiomyopathy. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- T Watanabe
- Gifu University Graduate School of Medicine, Cardiology, Gifu, Japan
| | - H Okada
- Gifu University Graduate School of Medicine, Emergency and Disaster Medicine, Gifu, Japan
| | - H Kanamori
- Gifu University Graduate School of Medicine, Cardiology, Gifu, Japan
| | - N Miyazaki
- Asahi University, Internal Medicine, Mizuho, Japan
| | - A Tsujimoto
- Gifu University Graduate School of Medicine, Cardiology, Gifu, Japan
| | - T Nawa
- Gifu University Graduate School of Medicine, Cardiology, Gifu, Japan
| | - T Tanaka
- Gifu University Graduate School of Medicine, Cardiology, Gifu, Japan
| | - M Kawasaki
- Gifu University Graduate School of Medicine, Cardiology, Gifu, Japan
| | - T Fujiwara
- Sonoda Women's University, Food and Nutrition, Amagasaki, Japan
| | - H Fujiwara
- Hyogo Prefectural Amagasaki General Medical Center, Amagasaki, Japan
| | - G Genzou
- Asahi University, Internal Medicine, Mizuho, Japan
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Yano T, Isozaki T, Ueda S, Miyazaki N, Kurihara R, Kato R, Miyazono S. An Experimental Study of Blowdown Thrust and Jet Forces for a Pipe under Boiling Water Reactor Loss-of-Coolant Accident Conditions. NUCL SCI ENG 2017. [DOI: 10.13182/nse84-a18592] [Citation(s) in RCA: 6] [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: 11/12/2022]
Affiliation(s)
- T. Yano
- Japan Atomic Energy Research Institute, Tokai Research Establishment, Department of Nuclear Safety Research, Tokai-mura, Naka-gun, Ibaraki-ken, Japan
| | - T. Isozaki
- Japan Atomic Energy Research Institute, Tokai Research Establishment, Department of Nuclear Safety Research, Tokai-mura, Naka-gun, Ibaraki-ken, Japan
| | - S. Ueda
- Japan Atomic Energy Research Institute, Tokai Research Establishment, Department of Nuclear Safety Research, Tokai-mura, Naka-gun, Ibaraki-ken, Japan
| | - N. Miyazaki
- Japan Atomic Energy Research Institute, Tokai Research Establishment, Department of Nuclear Safety Research, Tokai-mura, Naka-gun, Ibaraki-ken, Japan
| | - R. Kurihara
- Japan Atomic Energy Research Institute, Tokai Research Establishment, Department of Nuclear Safety Research, Tokai-mura, Naka-gun, Ibaraki-ken, Japan
| | - R. Kato
- Japan Atomic Energy Research Institute, Tokai Research Establishment, Department of Nuclear Safety Research, Tokai-mura, Naka-gun, Ibaraki-ken, Japan
| | - S. Miyazono
- Japan Atomic Energy Research Institute, Tokai Research Establishment, Department of Nuclear Safety Research, Tokai-mura, Naka-gun, Ibaraki-ken, Japan
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Kurishiba R, Endo T, Miyazaki N, Wang Y, Oka H, Sato Y, Sawa A, Hashimoto N, Ohnuki S. B23-P-16Multi-layer Method combined with Nano-indentation, FIB and XTEM for Nano-hardness Measurement. Microscopy (Oxf) 2015. [DOI: 10.1093/jmicro/dfv290] [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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Mine N, Taniguchi W, Nishio N, Izumi N, Miyazaki N, Yamada H, Nakatsuka T, Yoshida M. Synaptic modulation of excitatory synaptic transmission by nicotinic acetylcholine receptors in spinal ventral horn neurons. Neuroscience 2015; 290:18-30. [PMID: 25613686 DOI: 10.1016/j.neuroscience.2015.01.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Revised: 01/09/2015] [Accepted: 01/10/2015] [Indexed: 12/18/2022]
Abstract
Nicotinic acetylcholine receptors (nAChRs) are distributed widely in the central nervous system and play important roles in higher brain functions, including learning, memory, and recognition. However, functions of the cholinergic system in spinal motoneurons remain poorly understood. In this study, we investigated the actions of presynaptic and postsynaptic nAChRs in spinal ventral horn neurons by performing whole-cell patch-clamp recordings on lumbar slices from male rats. The application of nicotine or acetylcholine generated slow inward currents and increased the frequency and amplitude of spontaneous excitatory postsynaptic currents (sEPSCs). Slow inward currents by acetylcholine or nicotine were not inhibited by tetrodotoxin (TTX) or glutamate receptor antagonists. In the presence of TTX, the frequency and amplitude of miniature excitatory postsynaptic currents (mEPSCs) were also increased by acetylcholine or nicotine. A selective α4β2 nicotinic receptor antagonist, dihydro-β-erythroidine hydrobromide (DhβE), significantly decreased nicotine-induced inward currents without affecting the enhancement of sEPSCs and mEPSCs. In addition, a selective α7 nicotinic receptor antagonist, methyllycaconitine, did not affect either nicotine-induced inward currents or the enhancement of sEPSCs and mEPSCs. These results suggest that α4β2 AChRs are localized at postsynaptic sites in the spinal ventral horn, non-α4β2 and non-α7 nAChRs are located presynaptically, and nAChRs enhance excitatory synaptic transmission in the spinal ventral horn.
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Affiliation(s)
- N Mine
- Department of Orthopedic Surgery, Wakayama Medical University, Wakayama 641-8510, Japan
| | - W Taniguchi
- Pain Research Center, Kansai University of Health Sciences, Kumatori, Osaka 590-0482, Japan.
| | - N Nishio
- Pain Research Center, Kansai University of Health Sciences, Kumatori, Osaka 590-0482, Japan
| | - N Izumi
- Department of Orthopedic Surgery, Wakayama Medical University, Wakayama 641-8510, Japan
| | - N Miyazaki
- Department of Orthopedic Surgery, Wakayama Medical University, Wakayama 641-8510, Japan
| | - H Yamada
- Department of Orthopedic Surgery, Wakayama Medical University, Wakayama 641-8510, Japan
| | - T Nakatsuka
- Pain Research Center, Kansai University of Health Sciences, Kumatori, Osaka 590-0482, Japan
| | - M Yoshida
- Department of Orthopedic Surgery, Wakayama Medical University, Wakayama 641-8510, Japan
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Endo T, Sugino Y, Ohono N, Ukai S, Miyazaki N, Wang Y, Ohnuki S. Three-dimensional characterization of ODS ferritic steel using by FIB-SEM serial sectioning method. Microscopy (Oxf) 2014; 63 Suppl 1:i23. [DOI: 10.1093/jmicro/dfu052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Tanaka H, Kanazawa M, Kawakami T, Kido K, Kifune M, Kubo M, Tamimoto Y, Tokitou T, Tokushige A, Nibu K, Miyazaki N, Mitasato H, Yamamoto K, Yamamoto M, Watada T, Fukuta S, Taguchi T. FRI0236 Efficacy and safety of tocilizumab therapy in rheumatoid arthritis: prevalence and predictive factors of sustained remission. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2013-eular.1363] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Misaka S, Miyazaki N, Fukushima T, Yamada S, Kimura J. Effects of green tea extract and (-)-epigallocatechin-3-gallate on pharmacokinetics of nadolol in rats. Phytomedicine 2013; 20:1247-1250. [PMID: 23920278 DOI: 10.1016/j.phymed.2013.07.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Revised: 05/16/2013] [Accepted: 07/02/2013] [Indexed: 06/02/2023]
Abstract
Green tea catechins have been shown to affect the activities of drug transporters in vitro, including P-glycoprotein and organic anion transporting polypeptides. However, it remains unclear whether catechins influence the in vivo disposition of substrate drugs for these transporters. In the present study, we investigated effects of green tea extract (GTE) and (-)-epigallocatechin-3-gallate (EGCG) on pharmacokinetics of a non-selective hydrophilic β-blocker nadolol, which is reported to be a substrate for several drug transporters and is not metabolized by cytochrome P450 enzymes. Male Sprague-Dawley rats received GTE (400 mg/kg), EGCG (150 mg/kg) or saline (control) by oral gavage, 30 min before a single intragastric administration of 10 mg/kg nadolol. Plasma and urinary concentrations of nadolol were determined using high performance liquid chromatography. Pharmacokinetic parameters were estimated by a noncompartmental analysis. Pretreatment with GTE resulted in marked reductions in the maximum concentration (Cmax) and area under the time-plasma concentration curve (AUC) of nadolol by 85% and 74%, respectively, as compared with control. In addition, EGCG alone significantly reduced Cmax and AUC of nadolol. Amounts of nadolol excreted into the urine were decreased by pretreatments with GTE and EGCG, while the terminal half-life of nadolol was not different among groups. These results suggest that the coadministration with green tea catechins, particularly EGCG, causes a significant alteration in the pharmacokinetics of nadolol, possibly through the inhibition of its intestinal absorption mediated by uptake transporters.
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Affiliation(s)
- S Misaka
- Department of Pharmacology, School of Medicine, Fukushima Medical University, Fukushima, Japan.
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Nishio N, Taniguchi W, Sugimura YK, Takiguchi N, Yamanaka M, Kiyoyuki Y, Yamada H, Miyazaki N, Yoshida M, Nakatsuka T. Reactive oxygen species enhance excitatory synaptic transmission in rat spinal dorsal horn neurons by activating TRPA1 and TRPV1 channels. Neuroscience 2013; 247:201-12. [PMID: 23707800 DOI: 10.1016/j.neuroscience.2013.05.023] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [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: 02/02/2013] [Revised: 05/02/2013] [Accepted: 05/14/2013] [Indexed: 12/17/2022]
Abstract
Central neuropathic pain (CNP) in the spinal cord, such as chronic pain after spinal cord injury (SCI), is an incurable ailment. However, little is known about the spinal cord mechanisms underlying CNP. Recently, reactive oxygen species (ROS) have been recognized to play an important role in CNP of the spinal cord. However, it is unclear how ROS affect synaptic transmission in the dorsal horn of the spinal cord. To clarify how ROS impact on synaptic transmission, we investigated the effects of ROS on synaptic transmission in rat spinal cord substantia gelatinosa (SG) neurons using whole-cell patch-clamp recordings. Administration of tert-butyl hydroperoxide (t-BOOH), an ROS donor, into the spinal cord markedly increased the frequency and amplitude of spontaneous excitatory postsynaptic currents (sEPSCs) in SG neurons. This t-BOOH-induced enhancement was not suppressed by the Na(+) channel blocker tetrodotoxin. However, in the presence of a non-N-methyl-D-aspartate glutamate receptor antagonist, 6-cyano-7-nitroquinoxaline-2,3-dione, t-BOOH did not generate any sEPSCs. Furthermore, in the presence of a transient receptor potential ankyrin 1 (TRPA1) channel antagonist (HC-030031) or a transient receptor potential vanilloid 1 (TRPV1) channel antagonist (capsazepine or AMG9810), the t-BOOH-induced increase in the frequency of sEPSCs was inhibited. These results indicate that ROS enhance the spontaneous release of glutamate from presynaptic terminals onto SG neurons through TRPA1 and TRPV1 channel activation. Excessive activation of these ion channels by ROS may induce central sensitization in the spinal cord and result in chronic pain such as that following SCI.
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Affiliation(s)
- N Nishio
- Pain Research Center, Kansai University of Health Sciences, Kumatori, Osaka 590-0482, Japan
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Miyazaki N, Matsumoto J, Alberici F, Palmisano A, Maritati F, Oliva E, Buzio C, Vaglio A, Mjoen G, Norby GE, Vikse BE, Svarstad E, Rune B, Knut A, Szymczak M, Kuzniar J, Kopec W, Marchewka Z, Klinger M, Arrizabalaga P, Silvarino R, Sant F, Espinosa G, Sole M, Cervera R, Gude D, Chennamsetty S, Demin A, Kozlov V, Lisukov I, Kotova O, Sizikov A, Sergeevicheva V, Demina L, Borjesson O, Wendt M, Avik A, Qureshi AR, Bratt J, Miller EJ, Gunnarsson I, Bruchfeld A, Sugiyama K, Hasegawa M, Yamamoto K, Hayashi H, Koide S, Murakami K, Tomita M, Yoshida S, Yuzawa Y, Yew S, Jayne D, Westman K, Hoglund P, Flossman O, Mahr A, Luqmani R, Robson J, Thervet E, Levi C, Guiard E, Roland M, Nochy D, Daniliuc C, Guillevin L, Mouthon L, Jacquot C, Karras A, Kimura Y, Morita H, Debiec H, Yamada H, Miura N, Banno S, Ronco P, Imai H, Shin DH, Famee D, Koo HM, Han SH, Choi KH, Yoo TH, Kang SW, Fofi C, Fofi C, Scabbia L, Festuccia F, Stoppacciaro A, Mene' P, Shimizu A, Fukui M, MII A, Kaneko T, Masuda Y, Iino Y, Katayama Y, Fukuda Y, Kuroki A, Matsumoto K, Akizawa T, Jurubita R, Ismail G, Bobeica R, Rusu E, Zilisteanu D, Andronesi A, Motoi O, Ditoiu V, Copaci I, Voiculescu M, Irazabal MV, Eirin A, Lieske JC, Beck LH, Dillon JJ, Nachman PH, Sethi S, Erickson SB, Cattran DC, Fervenza FC, Svobodova B, Hruskova Z, Janatkova I, Jancova E, Tesar V, Seo MS, Kwon SH, Lee EB, You JY, Hyun YK, Woo SA, Park MY, Choi SJ, Jeon JS, Noh H, Kim JG, Han DC, Hwang SD, Choi TY, Jin SY, Kwon SH, Loiacono E, Loiacono E, Defedele D, Puccinelli MP, Camilla R, Gallo R, Peruzzi L, Rollino C, Beltrame G, Ferro M, Vergano L, Campolo F, Amore A, Coppo R, Knoop T, Vikse BE, Svarstad E, Bostad L, Leivestad T, Bjorneklett R, Teranishi J, Yamamoto R, Nagasawa Y, Shoji T, Iwatani H, Okada N, Moriyama T, Yamauchi A, Tsubakihara Y, Imai E, Rakugi H, Isaka Y, Koo HM, Doh FM, Kim SJ, Kang SW, Choi KH, Han DS, Han SH, Suzuki Y, Matsuzaki K, Suzuki H, Okazaki K, Yanagawa H, Maiguma M, Muto M, Sato T, Horikoshi S, Novak J, Hotta O, Tomino Y, Gutierrez* E, Zamora I, Ballarin J, Arce Y, Jimenez S, Quereda C, Olea T, Martinez-Ara J, Segarra A, Bernis C, Garcia A, Goicoechea M, Garcia de Vinuesa S, Rojas J, Praga M, Ristovska V, Petrushevska G, Grcevska L, Knoop T, Vikse BE, Svarstad E, Bostad L, Leivestad T, Bjorneklett R, Satake K, Shimizu Y, Mugitani N, Suzuki H, Suzuki Y, Horikoshi S, Honda S, Shibuya K, Shibuya A, Tomino Y, Papale M, Rocchetti MT, DI Paolo S, Suriano IV, D'apollo A, Vocino G, Montemurno E, Varraso L, Grandaliano G, Gesualdo L, Huerta A, Bomback AS, Canetta PA, Radhakrishnan J, Herlitz L, Stokes B, D'agati V, Markowitz G, Appel GB, Ristovska V, Grcevska L, Mouna H, Nasr BD, Mrabet I, Ahmed L, Sabra A, Mohamed Ammeur F, Mezri E, Habib S, Innocenti M, Pasquariello A, Pasquariello G, Mattei P, Bottai A, Fumagalli G, Bozzoli L, Samoni S, Cupisti A, Caldin B, Hung J, Repizo L, Malheiros DM, Barros R, Woronik V, Giammarresi C, Bono L, Ferrantelli A, Tortorici C, Licavoli G, Rotolo U, Huang X, Wang Q, Shi M, Chen W, Liu Z, Scarpioni R, Cantarini L, Lazzaro A, Ricardi M, Albertazzi V, Melfa L, Concesi C, Vallisa D, Cavanna L, Gungor G, Ataseven H, Demir A, Solak Y, Biyik M, Ozturk B, Polat I, Kiyici A, Ozer Cakir O, Polat H, Martinez-Ara J, Castillo I, Carreno V, Aguilar A, Madero R, Hernandez E, Bernis C, Bartolome J, Gea F, Selgas R, El Aggan HAM, El Banawy HS, Wagdy E, Tchebotareva N, LI O, Bobkova I, Kozlovskaya L, Varshavskiy V, Golicina E, Chen Y, Gong Z, Chen X, Tang L, Zhou J, Cao X, Wei R, Koo EH, Koo EH, Park JH, Kim HK, Kim MS, Jang HR, Lee JE, Huh W, Kim DJ, Oh HY, Kim YG, Tchebotareva N, Bobkova I, Kozlovskaya L, LI O, Eskova O, Shvetsov M, Golytsina E, Varshavskiy V, Popova O, Quaglia M, Monti S, Fenoglio R, Menegotto A, Airoldi A, Izzo C, Rizzo MA, Dianzani U, Stratta P, Vaglio A, Vaglio A, Alberici F, Gianfreda D, Buzio C. Primary and secondary glomerulonephritis I. Nephrol Dial Transplant 2012. [DOI: 10.1093/ndt/gfs223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Agnes H, Kalman P, Jozsef A, Henrik B, Mucsi I, Kamata K, Sano T, Naito S, Okamoto T, Okina C, Kamata M, Murano J, Kobayashi K, Uchida M, Aoyama T, Takeuchi Y, Nagaba Y, Sakamoto H, Torino C, Torino C, Panuccio V, Clementi A, Garozzo M, Bonanno G, Boito R, Natale G, Cicchetti T, Chippari A, Logozzo D, Alati G, Cassani S, Sellaro A, D'arrigo G, Tripepi G, Roberta A, Postorino M, Mallamaci F, Zoccali C, Buonanno E, Brancaccio S, Fimiani V, Napolitano P, Spadola R, Morrone L, DI Iorio B, Russo D, Betriu A, Martinez-Alonso M, Vidal T, Valdivielso J, Fernandez E, Bernadette F, Jean-Baptiste B, Frimat L, Madala ND, Thusi GP, Sibisi N, Mazibuko BG, Assounga AGH, Tsai NC, Wang HH, Chen YC, Hung CC, Hwang SJ, Chen HC, Branco P, Adragao T, Birne R, Martins AR, Vizinho R, Gaspar A, Grilo MJ, Barata JD, Bonhorst D, Adragao P, Kim JS, Yang JW, Kim MK, Choi SO, Han BG, Nathalie N, Sunny E, Glorieux G, Daniela B, Fellype B, Sophie L, Horst D L, Ziad M, Raymond V, Yanai M, Okada K, Takeuchi K, Nitta K, Takahashi S, Morena M, Jaussent I, Halkovich A, Dupuy AM, Bargnoux AS, Chenine L, Leray-Moragues H, Klouche K, Vernhet H, Canaud B, Cristol JP, Shutov A, Serov V, Kuznetsova J, Menzorov M, Serova D, Petrescu L, Zugravu A, Capusa C, Stancu S, Cinca S, Anghel C, Timofte D, Medrihan L, Ionescu D, Mircescu G, Hsu TW, Kuo KL, Hung SC, Tarng DC, Lee S, Kim I, Lee D, Rhee H, Song S, Seong E, Kwak I, Holzmann M, Gardell C, Jeppsson A, Sartipy U, Solak Y, Yilmaz MI, Caglar K, Saglam M, Yaman H, Sonmez A, Unal HU, Gok M, Gaipov A, Kayrak M, Eyileten T, Turk S, Vural A, DI Lullo L, Floccari F, Rivera R, Granata A, D'amelio A, Logias F, Otranto G, Malaguti M, Santoboni A, Fiorini F, Connor T, Oygar D, Nitsch D, Gale D, Steenkamp R, Neild GH, Maxwell P, Louise Hogsbro I, Redal-Baigorri B, Sautenet B, Halimi JM, Caille A, Goupille P, Giraudeau B, Solak Y, Yilmaz MI, Caglar K, Saglam M, Yaman H, Unal HU, Gok M, Oguz Y, Gaipov A, Yenicesu M, Cetinkaya H, Eyileten T, Turk S, Vural A, Chen YC, Wang HH, Tsai NC, Hung CC, Hwang SJ, Chen HC, Ishimoto Y, Ohki T, Sugahara M, Kanemitsu T, Kobayashi M, Uchida L, Kotera N, Tanaka S, Sugimoto T, Mise N, Miyazaki N, Matsumoto J, Murata I, Yoshida G, Morishita K, Ushikoshi H, Nishigaki K, Ogura S, Minatoguchi S, Harvey R, Harvey R, Ala A, Banerjee D, Farmer C, Irving J, Hobbs H, Wheeler T, Klebe B, Stevens P, Selim G, Selim G, Stojceva-Taneva O, Tozija L, Stojcev N, Gelev S, Dzekova-Vidimliski P, Pavleska S, Sikole A, Qureshi AR, Evans M, Stendahl M, Prutz KG, Elinder CG, Tamagaki K, Kado H, Nakata M, Kitani T, Ota N, Ishida R, Matsuoka E, Shiotsu Y, Ishida M, Mori Y, Christelle M, Rognant N, Evelyne D, Sophie F, Laurent J, Maurice L, Silverwood R, Pierce M, Kuh D, Savage C, Ferro C, Nitsch D, Moniek DG, De Goeij M, Nynke H, Gurbey O, Joris R, Friedo D, Clayton P, Grace B, Cass A, Mcdonald S, Lorenzo V, Martin Conde M, Betriu A, Dusso A, Valdivielso JM, Fernandez E, Roggeri DP, Cannella G, Cozzolino M, Mazzaferro S, Messa P, Brancaccio D, De Souza Faria R, Fernandes N, Lovisi J, Moura Marta M, Reboredo M, Do Vale Pinheiro B, Bastos M, Hundt F, Hundt F, Pabst S, Hammerstingl C, Gerhardt T, Skowasch D, Woitas R, Lopes AA, Silva LF, Matos CM, Martins MS, Silva FA, Lopes GB, Pizzarelli F, Dattolo P, Tripepi G, Michelassi S, Rossi C, Bandinelli S, Mieth M, Mass R, Ferrucci L, Zoccali C, Parisi S, Arduino S, Attini R, Fassio F, Biolcati M, Pagano A, Bossotti C, Ferraresi M, Gaglioti P, Todros T, Piccoli GB, Salgado TM, Arguello B, Benrimoj SI, Fernandez-Llimos F, Bailey P, Tomson C, Ben-Shlomo Y, Santoro A, Rucci P, Mandreoli M, Caruso F, Corradini M, Flachi M, Gibertoni D, Rigotti A, Russo G, Fantini M, Mahapatra HS, Choudhury S, Buxi G, Sharma N, Gupta Y, Sekhar V, Mahapatra HS, Choudhury S, Buxi G, Sharma N, Gupta Y, Sekhar V, Yanagisawa N, Ando M, Ajisawa A, Tsuchiya K, Nitta K, Janusz O, Mikolaj M, Jacek M, Boleslaw R, Prakash S, Coffin R, Schold J, Einstadter D, Stark S, Rodgers D, Howard M, Sehgal A, Stevens P, Irving J, Wheeler T, Klebe B, Farmer C, Palmer S, Tong A, Manns B, Craig J, Ruospo M, Gargano L, Strippoli G, Ruospo M, Palmer S, Vecchio M, Gargano L, Petruzzi M, De Benedictis M, Pellegrini F, Strippoli G, Ohno Y, Ishimura E, Naganuma T, Kondo K, Fukushima W, Mui K, Inaba M, Hirota Y, Sun X, Sun X, Jiang S, Gu H, Chen Y, XI C, Qiao X, Chen X, Daher E, Junior GS, Jacinto CN, Pimentel RS, Aguiar GBR, Lima CB, Borges RC, Mota LPC, Melo JVL, Melo SA, Canamary VT, Alves M, Araujo SMHA, Chen YC, Hung CC, Huang YK, Tsai NC, Wang HH, Hung CC, Hwang SJ, Chen HC, Rogacev K, Cremers B, Zawada A, Seiler S, Binder N, Ege P, Grosse-Dunker G, Heisel I, Hornof F, Jeken J, Rebling N, Ulrich C, Scheller B, Bohm M, Fliser D, Heine GH, Robinson B, Wang M, Bieber B, Fluck R, Kerr PG, Wikstrom B, Krishnan M, Nissenson A, Pisoni RL, Mykleset S, Osthus TB, Waldum B, Os I, Buttigieg J, Buttigieg J, Cassar A, Farrugia Agius J, Redal-Baigorri B, Hara M, Ando M, Tsuchiya K, Nitta K, Yamato M, Yasuda K, Sasaki K. Clinical Nephrology - Epidemiology II. Nephrol Dial Transplant 2012. [DOI: 10.1093/ndt/gfs236] [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: 11/13/2022] Open
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Miyazaki N, Akita F, Nakagawa A, Omura T, Iwasaki K. Structural analysis of rice dwarf virus in vitroand in vivo. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311094293] [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: 11/10/2022] Open
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Miyazaki N, Wu B, Hagiwara K, Wang CY, Xing L, Hammar L, Higashiura A, Tsukihara T, Nakagawa A, Omura T, Cheng RH. The functional organization of the internal components of Rice dwarf virus. J Biochem 2010; 147:843-50. [DOI: 10.1093/jb/mvq017] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [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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Narazaki T, Sato K, Abernathy KJ, Marshall GJ, Miyazaki N. Sea turtles compensate deflection of heading at the sea surface during directional travel. ACTA ACUST UNITED AC 2010; 212:4019-26. [PMID: 19946080 DOI: 10.1242/jeb.034637] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Air-breathing marine animals, including sea turtles, utilise two fundamentally different environments (i.e. sea surface and underwater) during migration. Many satellite telemetry studies have shown travel paths at relatively large spatio-temporal scales, discussing the orientation and navigation mechanisms that guide turtles. However, as travel paths obtained by satellite telemetry only reflect movements at the surface, little is known about movements and orientation ability underwater. In this study, to assess orientation ability both at the surface and underwater, fine-scale 3-D movements of free-ranging loggerhead turtles Caretta caretta were reconstructed by using multi-sensor data loggers. Video systems ('Crittercam') were also used to record the behaviour of the turtles and the visual information surrounding the turtles. During August and October in 2006 and 2007, eight turtles were released from Otsuchi Bay, Japan (39 degrees 20'30N, 141 degrees 56'00E), and a total of 118 h of 3-D movements were reconstructed. Turtles maintained highly straight-line courses (straightness index >0.95) during 41% of the total duration (i.e. 'travelling periods'). During travelling periods, turtles swam continuously, maintaining unidirectional heading throughout dives whereas turtles changed heading remarkably at the surface. Despite highly directional movements during dives, travel direction tended to shift by the end of dives lasting 10 minutes or more. Such deflections seemed to be compensated during subsequent surfacing periods because there was a negative relationship between changes in travel direction arising during dives and subsequent surfacing periods. Therefore, remarkable changes in heading at the surface could be interpreted as direction-searching behaviour. Our results suggested that turtles undertaking directional travel were more dependent on directional information that was reliable at the surface.
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Affiliation(s)
- T Narazaki
- Department of Natural Environmental Studies, Graduate School of Frontier Science, The University of Tokyo, 1-15-1 Minamidai, Nakano, Tokyo 164-8639, Japan.
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Katoh-Semba R, Kaneko R, Kitajima S, Tsuzuki M, Ichisaka S, Hata Y, Yamada H, Miyazaki N, Takahashi Y, Kato K. Activation of p38 mitogen-activated protein kinase is required for in vivo brain-derived neurotrophic factor production in the rat hippocampus. Neuroscience 2009; 163:352-61. [PMID: 19524026 DOI: 10.1016/j.neuroscience.2009.06.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2009] [Revised: 04/26/2009] [Accepted: 06/04/2009] [Indexed: 10/20/2022]
Abstract
Several lines of evidence strongly suggest that brain-derived neurotrophic factor (BDNF) is associated with the formation, storage and recall of memory in the hippocampus and that it is important to maintain a considerable level of hippocampal BDNF in order to keep normal functions. BDNF can be synthesized in an activity-dependent manner. In fact, kainic acid or AMPA enhances BDNF levels in hippocampal granule neurons. However, the mechanisms of BDNF production are largely unclear. Recently, we have found that riluzole, which blocks voltage-gated sodium channels and thereby reduces glutamate release, actually strengthens immunoreactivity of BDNF in hippocampal granule neurons of rats. Therefore, we examined the riluzole-activated signaling pathways for BDNF production. Riluzole increased levels of phospho-p38 mitogen-activated protein kinase (p38 MAPK), as well as BDNF levels. Inhibition of p38 MAPK by SB203580 reduced riluzole effects, while activation of p38 MAPK by anisomycin increased levels of BDNF, suggesting that p38 MAPK can mediate BDNF production. Riluzole-induced elevation of phospho-activating transcription factor-2, a transcription factor downstream of p38 MAPK, was also observed. A blocker of N-type voltage-gated calcium channels reduced the effects of riluzole on BDNF production and p38 MAPK activation. We also examined a possible involvement of the adenosine A1 receptor in BDNF production because riluzole can influence ecto-nucleotide levels. An A1 receptor agonist inhibited riluzole-induced elevation of BDNF levels, whereas an antagonist not only increased levels of BDNF and active p38 MAPK but also augmented riluzole effects. These results indicate that, in the rat hippocampus, there is an in vivo signaling pathway for BDNF synthesis mediated by p38 MAPK, and that N-type voltage-gated calcium channels and/or adenosine A1 receptors contribute to p38 MAPK activation.
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Affiliation(s)
- R Katoh-Semba
- Institute for Developmental Research, Aichi Human Service Center, Kasugai, Aichi, 480-0392, Japan.
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Miyazaki N, Wang CY, Higashiura A, Nakagawa A, Li TC, Takeda N, Xing L, Tomitake T, Miyamura T, Cheng R. Crystallization and structure determination of recombinant hepatitis E virus-like particle. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308089538] [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: 11/11/2022] Open
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Iwasaki K, Miyazaki N, Ito T, Takagi J. Structures of the laminin-binding integrins. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308080641] [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: 11/11/2022] Open
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Omura T, Miyazaki N, Naitow H, Wei T, Shimizu T, Cheng R, Nakagawa A, Tsukihara T. The assembly process of the double-layered capsids of phytoreoviruses. Acta Crystallogr A 2008. [DOI: 10.1107/s010876730809781x] [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: 11/10/2022] Open
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Naitow H, Miyazaki N, Tsukihara T, Nakagawa A, Omura T, Kamiya N. The N-terminal induced-fit loops of capsid protein of rice dwarf virus stabilize capsid of the virus. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308089526] [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: 11/10/2022] Open
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Watanabe Y, Wei Q, Yang D, Chen X, Du H, Yang J, Sato K, Naito Y, Miyazaki N. Swimming behavior in relation to buoyancy in an open swimbladder fish, the Chinese sturgeon. J Zool (1987) 2008. [DOI: 10.1111/j.1469-7998.2008.00451.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Harino H, Ohji M, Wattayakorn G, Adulyanukosol K, Arai T, Miyazaki N. Accumulation of organotin compounds in tissues and organs of stranded whales along the coasts of Thailand. Arch Environ Contam Toxicol 2007; 53:119-25. [PMID: 17285238 DOI: 10.1007/s00244-006-0128-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2006] [Accepted: 09/16/2006] [Indexed: 05/13/2023]
Abstract
Concentrations of butyltin (BT) and phenyltin (PT) compounds were measured in organs and tissues of five species of whales (Bride's whale [Balaenoptera edeni], false killer whale [Pseudorca crassidens], pygmy sperm whale [Kogia breviceps], short-finned pilot whale [Globicephala macrorhynchus], and sperm whale [Physeter macrocephalus]) found stranded on the coasts of Thailand. The mean concentrations of BTs in various whales were in the range of 0.157 to 1.03 mg kg(-1 )wet weight, which were higher levels than the reported concentrations in whales from other countries. PT concentrations were also detected in the range of 0.022 to 1.14 mg kg(-1) wet weight. The concentrations of BTs and PTs in whales were higher than those in mussels from the coastal area of Thailand. Concentrations of tributyltin (TBT) and triphenyltin (TPT) compounds in whale organs and tissues were also compared, and it was found that TBT concentrations were generally higher in liver and lower in lung. TPT concentrations were higher in liver and blubber and lower in lung. Ratios of TBT degradation products in whale liver, namely monobutyltin (MBT) and dibutyltin (DBT), were higher than the ratios of TBT. TPTs in liver were found to be dominant among PTs. The patterns of BTs and PTs in false killer whale liver were different from those in the other whales by cluster analysis. Their concentrations in false killer whales were the highest among all whales in this study. False killer whales feed on squid and large pelagic fish containing higher concentrations of organotin (OT) compounds, so the differences in patterns and concentrations of OTs in liver between false killer whales and the other whales may be caused by difference in diet.
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Affiliation(s)
- H Harino
- Osaka City Institute of Public Health and Environmental Sciences, Tohjo-cho, 8-34, Tennoji-ku, Osaka, 543-0026, Japan.
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Kabir MK, Kawata S, Adachi K, Tobita H, Miyazaki N, Kumagai H, Katada M, Kitagawa S. Iron-Chloranilate Intercalation Compounds: Synthesis, Crystal Structures, and Thermal Properties. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587250008026187] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- M. K. Kabir
- a Department of Chemistry , Shizuoka University , 836 Oya, Shizuoka , 422-8529 , Japan
| | - S. Kawata
- a Department of Chemistry , Shizuoka University , 836 Oya, Shizuoka , 422-8529 , Japan
| | - K. Adachi
- a Department of Chemistry , Shizuoka University , 836 Oya, Shizuoka , 422-8529 , Japan
| | - H. Tobita
- b Department of Chemistry , Tokyo Metropolitan University , Minami Ohsawa, Hachiouji, Tokyo , 192-0397 , Japan
| | - N. Miyazaki
- a Department of Chemistry , Shizuoka University , 836 Oya, Shizuoka , 422-8529 , Japan
| | - H. Kumagai
- b Department of Chemistry , Tokyo Metropolitan University , Minami Ohsawa, Hachiouji, Tokyo , 192-0397 , Japan
| | - M. Katada
- b Department of Chemistry , Tokyo Metropolitan University , Minami Ohsawa, Hachiouji, Tokyo , 192-0397 , Japan
| | - S. Kitagawa
- c Department of Synthetic Chemistry and Biological Chemistry , Graduate School of Engineering, Kyoto University , Yoshida, Sakyo-ku, Kyoto , 606-8501 , Japan
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Limbong D, Kumampung J, Ayhuan D, Arai T, Miyazaki N. Mercury pollution related to artisanal gold mining in north Sulawesi Island, Indonesia. Bull Environ Contam Toxicol 2005; 75:989-96. [PMID: 16400589 DOI: 10.1007/s00128-005-0847-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2005] [Accepted: 08/26/2005] [Indexed: 05/06/2023]
Affiliation(s)
- D Limbong
- International Coastal Research Center, Ocean Research Institute, The University of Tokyo, Akahama, Otsuchi, Iwate Japan
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Akita F, Tee CK, Tanaka H, Miyazaki N, Nanba K, Nakaishi Y, Ono Y, Yamashita E, Suzuki M, Tsukihara T, Nakagawa A. X-ray crystallographic structure of virus like particle from hyperthermophilic archaea Pyrococcus furiosus. Acta Crystallogr A 2005. [DOI: 10.1107/s010876730508997x] [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: 11/10/2022] Open
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Takayama K, Ichiki M, Kawasaki M, Ninomiya K, Miyazaki N, Kuba M, Harada T, Nakanishi Y. P-580 Phase II study of biweekly paclitaxel plus carboplatin in patients with non-small cell lung cancer (NSCLC); Kyushu Thoracic Oncology Group (KTOG) 0107. Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)81073-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ikemoto T, Kunito T, Tanaka H, Baba N, Miyazaki N, Tanabe S. Detoxification mechanism of heavy metals in marine mammals and seabirds: interaction of selenium with mercury, silver, copper, zinc, and cadmium in liver. Arch Environ Contam Toxicol 2004; 47:402-13. [PMID: 15386135 DOI: 10.1007/s00244-004-3188-9] [Citation(s) in RCA: 166] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Subcellular distribution of mercury, selenium, silver, copper, zinc, and cadmium was determined in the liver of northern fur seals (Callorhinus ursinus), black-footed albatrosses (Diomedea nigripes), and Dall's porpoises (Phocoenoides dalli). Mercury, selenium, and silver were preferentially accumulated in nuclear, lysosomal, and mitochondrial fraction with an increase in their hepatic concentrations, whereas copper, zinc, and cadmium were accumulated mainly in cytosol with an increase in the hepatic concentrations for all three species. To gain insight into the existing state of the metals, they were extracted with four extractants--sodium dodecylsulfate (SDS); 2-mercaptoethanol; 2-mercaptoethanol + guanidinium thiocyanate; and copper sulfate (CuSO4)--at several concentrations from nuclear, lysosomal, and mitochondrial fraction in liver from a specimen of northern fur seal. Extraction efficiencies of the metals for 2-mercaptoethanol + guanidinium thiocyanate and CuSO4 were much higher than those for SDS and 2-mercaptoethanol. Also, for all individuals of the three species, metals were extracted by the three extractants--2% SDS; 0.25 mol/L 2-mercaptoethanol + 5 mol/L guanidinium thiocyanate; and 0.1 mol/L CuSO4--from nuclear, lysosomal, and mitochondrial fraction of liver. In the northern fur seals with higher concentration of mercury, the molar ratio of selenium to mercury approached unity in the nonextractable fraction of 0.25 mol/L 2-mercaptoethanol + 5 mol/L guanidinium thiocyanate, suggesting the possible formation of mercuric selenide (HgSe) with increasing hepatic concentration. Because the nonextractable content of mercury and its distribution were larger for black-footed albatross than those for the other two species, it was suggested that the black-footed albatross has a stronger ability to form a stable compound(s) of mercury in the liver. It is notable that the existing state of silver was similar to that of mercury as judged by their subcellular distribution and the extraction tests, suggesting that silver also interacted with selenium in the liver of marine animals used in this study.
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Affiliation(s)
- T Ikemoto
- Center for Marine Environmental Studies, Ehime University, Bunkyo-cho 2-5, Matsuyama 790-8577, Japan
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Limbong D, Kumampung J, Rumengan IFM, Arai T, Miyazaki N. Mercury concentrations in the community drinking water sources around Manado City, North Sulawesi, Indonesia. Bull Environ Contam Toxicol 2004; 73:506-510. [PMID: 15386172 DOI: 10.1007/s00128-004-0458-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Affiliation(s)
- D Limbong
- Faculty of Fisheries and Marine Science, Sam Ratulangi University, Manado 95115, Indonesia
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Takayama K, Ichiki M, Kawasaki M, Ninomiya K, Miyazaki N, Kuba M, Iwami F, Nakanishi Y. Biweekly combination chemotherapy with paclitaxel and carboplatin for advanced non-small cell lung cancer. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.7335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- K. Takayama
- Research Instituite for Diseases of the Chest, Kyushu University, Fukuoka, Japan; Kyushu Thoracic Oncology Group, Fukuoka, Japan
| | - M. Ichiki
- Research Instituite for Diseases of the Chest, Kyushu University, Fukuoka, Japan; Kyushu Thoracic Oncology Group, Fukuoka, Japan
| | - M. Kawasaki
- Research Instituite for Diseases of the Chest, Kyushu University, Fukuoka, Japan; Kyushu Thoracic Oncology Group, Fukuoka, Japan
| | - K. Ninomiya
- Research Instituite for Diseases of the Chest, Kyushu University, Fukuoka, Japan; Kyushu Thoracic Oncology Group, Fukuoka, Japan
| | - N. Miyazaki
- Research Instituite for Diseases of the Chest, Kyushu University, Fukuoka, Japan; Kyushu Thoracic Oncology Group, Fukuoka, Japan
| | - M. Kuba
- Research Instituite for Diseases of the Chest, Kyushu University, Fukuoka, Japan; Kyushu Thoracic Oncology Group, Fukuoka, Japan
| | - F. Iwami
- Research Instituite for Diseases of the Chest, Kyushu University, Fukuoka, Japan; Kyushu Thoracic Oncology Group, Fukuoka, Japan
| | - Y. Nakanishi
- Research Instituite for Diseases of the Chest, Kyushu University, Fukuoka, Japan; Kyushu Thoracic Oncology Group, Fukuoka, Japan
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Arai T, Maeda M, Yamakawa H, Kamatani A, Ohji M, Miyazaki N. Uptake and elimination of trace metals in shells of abalones Haliotis spp. Bull Environ Contam Toxicol 2003; 71:75-82. [PMID: 12945845 DOI: 10.1007/s00128-003-0133-y] [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: 05/24/2023]
Affiliation(s)
- T Arai
- Otsuchi Marine Research Center, Ocean Research Institute, The University of Tokyo, 2-106-1, Akahama, Otsuchi, Iwate 028-1102, Japan
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Yang J, Kunito T, Tanabe S, Miyazaki N. Comparative study of mercury in liver and muscle of Dall's porpoise (Phocoenoides dalli) off Sanriku coast of Japan. ACTA ACUST UNITED AC 2003. [DOI: 10.1051/jp4:20030562] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Abstract
The muscles of mastication and their related skull characters in the Caspian seal (Phoca caspica) were anatomically examined and compared with those of the Baikal (Phoca sibirica) and ringed (Phoca hispida) seals. A well-developed masseter muscle was observed in the Caspian seal, whereas the temporal muscle consisted of thin bundles. The skull of the Caspian seal possessed the same thin frontal bone and the dorso-ventrally developed zygomatic arch found in the Baikal seal that are required to install the enlarged eyeball into the orbit. The temporal bone was not robust, and the digastric muscle was well-developed in the ventral space of the auditory bulla. The present results suggest that the skull form of the Caspian seal has changed morphologically from its ringed seal-like ancestors, and suggest that the evolutionary strategy of the muscles of mastication in the Caspian seal is principally consistent with that of the Baikal seal.
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Affiliation(s)
- H Endo
- Department of Zoology, National Science Museum, Tokyo, Japan.
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Nakagawa A, Miyazaki N, Taka J, Naitow H, Ogawa A, Fujimoto Z, Mizuno H, Azuma T, Watanabe Y, Omura T, Cheng RH, Tsukihara T. The atomic structure of a double shelled virus, rice dwarf virus. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302085574] [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: 11/11/2022] Open
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Miyazaki N, Taka J, Naitou H, Ogawa A, Nakagawa A, Fujimoto Z, Mizuno H, Higashi T, Watanabe Y, Omura T, Cheng RH, Tsukihara T. Assembly mechanism of a double-shelled virus, rice dwarf virus. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302096393] [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: 11/10/2022] Open
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Abstract
Heat-induced cell death and apoptosis were studied with respect to intracellular ATP. Studies on the relationship between hyperthermic cell-killing at 44 degrees C and cellular ATP levels in four cell lines grown as monolayers and six cell lines grown in suspension showed good correlations between cellular ATP levels and the sensitivity to heat. D(0) values (the dose required to reduce survival in the linear portion of the response by 63%) linearly increased with an increase in cellular ATP levels. No such changes in sensitivity to heat were observed between the cells cultured at different cell densities, regardless of the change in the cellular ATP level. These results suggest that cellular intrinsic ability to supply ATP rather than the level of pooled ATP per se is responsible for the thermal response. Heat-induced apoptosis in L5178Y cells was observed following treatment at 42 degrees C for 70 min, 44 degrees C for 20 min or 47 degrees C for 3 min, which corresponded to surviving fractions of 25, 0.6 and 0.8%, respectively, but not at 47 degrees C for 20 min, indicating that mild heat shock induced apoptosis. 2-deoxyglucose (2DG) and 2,4-dinitrophenol (DNP) increased the sensitivity to heat and affected the mode of cell death. Cells treated with 2DG and DNP (2DG/DNP) were heated at 42 degrees C for 20 min, and then incubated at 37 degrees C for up to 2h in the presence or absence of 2DG/DNP. In the absence of 2DG/DNP, the cellular ATP level recovered to 76% of the control level and DNA ladder formation was observed, whereas in the presence of 2DG/DNP, the cellular ATP level was further decreased (3-7% of the control) and no DNA fragmentation was detected. These results suggest that the inhibition of ATP synthesis is closely associated with the enhancement of sensitivity to heat and that ATP is required for the induction of apoptosis.
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Affiliation(s)
- N Miyazaki
- Tokyo Metropolitan Industrial Technology Research Institute, Komazawa Office, 2-11-1, Fukazawa, Setagaya-ku, Tokyo 158-0081, Japan.
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Watanabe I, Kunito T, Tanabe S, Amano M, Koyama Y, Miyazaki N, Petrov EA, Tatsukawa R. Accumulation of heavy metals in Caspian seals (Phoca caspica). Arch Environ Contam Toxicol 2002; 43:109-120. [PMID: 12045881 DOI: 10.1007/s00244-001-0055-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Concentrations of heavy metals (Fe, Mn, Zn, Cu, Pb, Ni, Cd, Co, and Hg) were determined in the muscle, liver, and kidney of 42 Caspian seals and fishes collected from the Caspian Sea in 1993. Higher Mn and lower Fe and Cu concentrations were found in the liver in comparison with other marine pinnipeds. Lower Cu concentrations in the liver appear to be a common feature in small seals belonging to subgenus Pusa, which include ringed, Baikal, and Caspian seals. However, low Fe and high Mn in livers were specific to Caspian seal. Concentrations of toxic metals such as Hg and Cd were relatively low. Pinniped species can be divided into two groups, based on accumulations of Cd or Hg in the liver. Interestingly, it was found that Cd-accumulating groups feed on invertebrates, whereas the preferred diet of Hg accumulators is fish. Caspian seals seemed to belong to the Hg-accumulating group.Cd and Hg concentrations in the liver and kidney of young animals increased with age. Mercury concentrations in adult animals increased with age continuously, whereas Cd concentrations in adult animals decreased. This trend might be due to preferential feeding habits and shift in ratio of Hg and Cd in the diet ( i.e., invertebrates to fish).
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Affiliation(s)
- I Watanabe
- Department of Environment Conservation, Ehime University, Tarumi 3-5-7, Matsuyama 790-8566, Japan
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Anan Y, Kunito T, Ikemoto T, Kubota R, Watanabe I, Tanabe S, Miyazaki N, Petrov EA. Elevated concentrations of trace elements in Caspian seals (Phoca caspica) found stranded during the mass mortality events in 2000. Arch Environ Contam Toxicol 2002; 42:354-362. [PMID: 11910465 DOI: 10.1007/s00244-001-0004-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Concentrations of V, Mn, Fe, Cr, Co, Cu, Zn, As, Se, Mo, Ag, Cd, Tl, Hg, Pb, and organic mercury (Org-Hg) were determined in liver, kidney, and muscle of healthy Caspian seals ( Phoca caspica) collected in 1998. These concentrations were compared with those of seals infected with canine distemper virus (CDV) found stranded along the coastal areas in 2000. Concentrations of toxic elements (As, Ag, Cd, Tl, Hg, Pb, and Org-Hg) in Caspian seals stranded in 2000 were comparable or lower than those of samples collected in 1998 and in other pinnipeds. Thus it may be inferred that these elements were not the causative agents in the deaths of the seals. In contrast, concentrations of Zn and Fe were much higher in diseased Caspian seals than those in other pinnipeds. Zinc concentrations in all tissues of Caspian seals also increased during 1993-2000. Furthermore, negative correlations were found between blubber thickness and hepatic and renal Zn concentrations. These results imply the disturbance in homeostatic control and nutritional status of essential elements in Caspian seals stranded in 2000.
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Affiliation(s)
- Y Anan
- Center for Marine Environmental Studies (CMES), Ehime University, Tarumi 3-5-7, Matsuyama 790-8566, Japan
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Kajiwara N, Niimi S, Watanabe M, Ito Y, Takahashi S, Tanabe S, Khuraskin LS, Miyazaki N. Organochlorine and organotin compounds in Caspian seals (Phoca caspica) collected during an unusual mortality event in the Caspian Sea in 2000. Environ Pollut 2002; 117:391-402. [PMID: 11911523 DOI: 10.1016/s0269-7491(01)00200-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Polychlorinated biphenyls (PCBs), organochlorine pesticides and organotin compounds were determined in the blubber and liver of Caspian seals (Phoca caspica) found stranded on the coast of the Caspian Sea during an outbreak of canine distemper virus (CDV) in 2000. Among organochlorines analyzed, DDTs were the most dominant contaminants with concentrations ranging from 6.3 to 470 microg/g on a lipid-weight basis. Caspian seals collected in 2000 during the epizootic had higher concentrations of organochlorines than healthy individuals sampled in 1998. However, the blubber layer was generally thinner in the seals collected in 2000 than those in the previous surveys. Although compositions of organochlorine pesticides in seals suggested that the contamination status in the Caspian Sea is improving, the levels found in Caspian seals in 2000 were comparable to those in other marine mammals that have suffered from epizootics. This implies that the present status of contamination found in Caspian seals poses a risk of immunosuppression. Concentrations of butyltin compounds in livers of seals ranged from 0.49 to 17 ng/g on a wet-weight basis and octyltin compounds were below limit of detection in all the samples analyzed, suggesting less contamination by organotin compounds in the Caspian Sea.
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Affiliation(s)
- N Kajiwara
- Center for Marine Environmental Studies, Ehime University, Tarumi, Matsuyama, Japan
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Nakata H, Sakakibara A, Kanoh M, Kudo S, Watanabe H, Nagai N, Miyazaki N, Asano Y, Tanabe S. Evaluation of mitogen-induced responses in marine mammal and human lymphocytes by in-vitro exposure of butyltins and non-ortho coplanar PCBs. Environ Pollut 2002; 120:245-253. [PMID: 12395836 DOI: 10.1016/s0269-7491(02)00155-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The effects of exposure to butyltin compounds (BTs: tributyltin; TBT, dibutyltin; DBT and monobutyltin; MBT) and non-ortho coplanar PCBs (IUPAC 77, 126 and 169) on marine mammals and human lymphocyte were evaluated. Peripheral blood mononuclear cells (PBMCs) isolated from Dall's porpoises (Phocoenoides dalli), bottlenose dolphins (Tursiops truncatus), a California sealion (Zalophus californianus), a larga seal (Phocoa largha) and humans (Homo sapiens) were exposed at varying concentrations of BTs and coplanar PCBs. Concanavalin A (Con A)-stimulated mitogenesis found significantly suppressed (P<0.01) when the cells were exposed at 300 nM (89 ng/ml) of TBT and 330 nM of DBT (77 ng/ml), while MBT showed little cytotoxicity at treatment levels of up to 3,600 nM (620 ng/ml). BTs concentrations in the liver of Dall's porpoises from Japanese coastal waters ranged between 81-450 ng/g for TBT and 200-1,100 ng/g (wet wt.) for DBTs, which is greater than the cytotoxic levels registered in this study. In contrast, non-ortho coplanar PCBs did not suppress cell proliferation at concentrations of up to 30 nM (10 ng/ml). The residue levels of coplanar PCBs in the blubber of Dall's porpoises were 0.12-1.3 ng/g, which were one order of lower than those levels that do cell proliferation. When cells were exposed to a mixture of TBT/DBTand coplanar PCBs, the proliferation was significantly reduced to 33 nM DBT plus 34 nM CB-77 and 33 nM DBT plus 28 nM CB-169 mixtures, respectively. The investigations relating the contaminant-induced immunosuppression in marine mammals have been focused on persistent organochlorines such as PCBs. pesticides and dioxin compounds. However, this study suggested the possibility of BTs could also pose a serious threat to the immune functions in free-ranging marine mammals and humans.
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Affiliation(s)
- H Nakata
- Graduate School of Science and Technology, Kumamoto University, Japan.
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Ohashi K, Miyazaki N, Tanabe S, Nakata H, Miura R, Fujita K, Wakasa C, Uema M, Shiotani M, Takahashi E, Kai C. Seroepidemiological survey of distemper virus infection in the Caspian Sea and in Lake Baikal. Vet Microbiol 2001; 82:203-10. [PMID: 11470542 DOI: 10.1016/s0378-1135(01)00371-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Forty Caspian seals were surveyed seroepidemiologically between 1993 and 1998 around the times of mass mortality that occurred in 1997 in the Caspian Sea and seven Baikal seals were also surveyed in 1998. Virus neutralizing tests and ELISA clearly suggested that distemper virus epidemic was caused in Caspian seals before the spring of 1997 and that CDV infection continued to occur in Lake Baikal in recent years.
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Affiliation(s)
- K Ohashi
- Laboratory of Animal Research Center, Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8634, Japan
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Abstract
A comparative study on the butyltin levels in various organisms showed that marked bioaccumulation occurs in certain lower trophic levels; i.e. from seawater to phytoplankton and into caprellid amphipods, Caprella spp. Caprella spp., which inhabit algal communities and aquaculture beds in the subtidal zone, are small crustaceans with reduced movement and a life-span of less than 3 months. These characteristics indicate that Caprella spp. may be well-suited for monitoring butyltin residue changes over small spatial and temporal scales. Two groups of organisms, mussels and neogastropods, have been mainly used for monitoring butyltin in shallow water ecosystems. These invertebrates mainly inhabit the intertidal zone where the butyltin levels vary widely depending on the immersion period and exposure to the sea surface microlayer. Monitoring using neogastropods may also over estimate exposures after restrictions on tributyltin, since neogastropods show an irreversible response to residue changes owing to their long life-spans. Thus, we propose usage of Caprella spp. to monitor temporal and spatial changes in baseline concentrations of butyltins.
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Affiliation(s)
- I Takeuchi
- Otsuchi Marine Research Center, Ocean Research Institute, The University of Tokyo, Akahama, Iwate, Japan.
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Okamoto Y, Miyazaki N, Kurumagawa H, Fujino K, Mori K, Shimizu S, Ishikawa K. Relationship between morbidity and body mass index of mariners in the Japan Maritime Self-Defense Force Fleet Escort Force. Mil Med 2001; 166:681-4. [PMID: 11515316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023] Open
Abstract
To establish a practical weight management program for mariners in the Japan Maritime Self-Defense Force (JMSDF) Fleet Escort Force, the relationship between morbidity and body mass index (BMI) was studied. To estimate morbidity, 10 medical problems were used as indices (hyperlipidemia, hyperuricemia, diabetes mellitus, lung disease, heart disease, upper gastrointestinal tract disease, hypertension, renal disease, liver disease, and anemia). A curvilinear relationship was found between morbidity and BMI, in which a BMI of 17.5 was associated with the lowest morbidity. This curvilinear pattern was more complex than a curve reported previously for Japanese civilians. Using the present curve and aiming for a BMI of 17.5 will help in the design and implementation of a practical management program for health promotion in the JMSDF.
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Affiliation(s)
- Y Okamoto
- Japan Defense Agency, 5-1 Motomura-cho, Ichigaya, Shinjuku, Tokyo, Japan 162-8801.
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Iwatani Y, Shimada Y, Ohshima T, Kusunoki N, Yamazaki T, Miyazaki N. [Postoperative chemotherapy with a novel oral anticancer drug composed of tegafur, gimeracil and oteracil potassium to curability C scirrhus type gastric cancer]. Gan To Kagaku Ryoho 2001; 28:1129-32. [PMID: 11525030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
We report the a case of 60-year-old male whose final finding was curability C and stage IV scirrhus type gastric cancer because of N3, CY1 and DM (+) treated with a novel oral anticancer drug composed of tegafur (FT), Gimeracil (CDHP) and Oteracil Potassium (Oxo) in a molar ratio of 1:04:1 after operation. This drug was administered orally twice daily after meals at a dose of 80 mg/body/day. One cycle consisted of consecutive administration for 28 days and 14 days rest, and this treatment cycle was repeated twice. Postoperative abdominal CT showed swollen paraaortic lymph nodes regarded as metastasis. However, they were reduced after 1 cycle and remained so. The serum carcinoembryonic antigen (CEA) level had decreased after 1 cycle. The patient's performance status (PS) had also recovered without severe side effects. It was considered that this anticancer drug composed of FT, CDHP and Oxo was effective to scirrhus type gastric cancer and useful as an adjuvant chemotherapy in view of the patient's living quality.
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Affiliation(s)
- Y Iwatani
- Dept. of Gastroenterological Surgery, Hyogo Prefectural Kaibara Hospital
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Aizawa H, Inoue H, Miyazaki N, Hara N. Histamine-induced increase in isometric tension of smooth muscle is mediated by local vagus nerve in human bronchus. Respiration 2001; 67:652-6. [PMID: 11124648 DOI: 10.1159/000056295] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The vagus nerve is reported to play an important role in the regulation of airway responsiveness. OBJECTIVE In the present study, we investigated the role of the local vagus nerve in the changes in isometric tension of smooth muscle induced by histamine in the human airway. METHODS Eight human lung tissue specimens were obtained at thoracic surgery, and 24 bronchial smooth muscle strips were used for isometric tension recording. The changes in isometric tension were induced by histamine in the presence or absence of physostigmine (10(-6) M), atropine (10(-6) M), and/or tetrodotoxin (10(-6) M). RESULTS We found that: (1) histamine induced a dose-dependent increase in the isometric tension in human bronchial smooth muscle; (2) physostigmine (10(-6) M) significantly potentiated the amplitude of the histamine-induced increase in isometric tension; (3) atropine (10(-6) M) significantly suppressed the histamine-induced increase in isometric tension; (4) tetrodotoxin (10(-6) M), did not affect the histamine-induced increase in isometric tension of smooth muscle, and (5) in the presence of tetrodotoxin, atropine significantly suppressed the histamine-induced increase in isometric tension. CONCLUSION These findings suggest that the histamine-induced increase in isometric tension is mediated partly by acetylcholine, presumably released by the direct action of histamine on the vagus efferent nerve terminals without the central reflex via vagus nerve.
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Affiliation(s)
- H Aizawa
- Clinical Research Institute, National Fukuoka-Higashi Hospital, Koga, Japan.
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Inagaki S, Ohoka Y, Sugimoto H, Fujioka S, Amazaki M, Kurinami H, Miyazaki N, Tohyama M, Furuyama T. Sema4c, a transmembrane semaphorin, interacts with a post-synaptic density protein, PSD-95. J Biol Chem 2001; 276:9174-81. [PMID: 11134026 DOI: 10.1074/jbc.m009051200] [Citation(s) in RCA: 54] [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: 11/06/2022] Open
Abstract
Semaphorins are known to act as chemorepulsive molecules that guide axons during neural development. Sema4C, a group 4 semaphorin, is a transmembrane semaphorin of unknown function. The cytoplasmic domain of Sema4C contains a proline-rich region that may interact with some signaling proteins. In this study, we demonstrate that Sema4C is enriched in the adult mouse brain and associated with PSD-95 isoforms containing PDZ (PSD-95/DLG/ZO-1) domains, such as PSD-95/SAP90, PSD-93/chapsin110, and SAP97/DLG-1, which are concentrated in the post-synaptic density of the brain. In the neocortex, S4C is enriched in the synaptic vesicle fraction and Triton X-100 insoluble post-synaptic density fraction. Immunostaining for Sema4C overlaps that for PSD-95 in superficial layers I-IV of the neocortex. In neocortical culture, S4C is colocalized with PSD-95 in neurons, with a dot-like pattern along the neurites. Sema4C thus may function in the cortical neurons as a bi-directional transmembrane ligand through interacting with PSD-95.
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Affiliation(s)
- S Inagaki
- Group of Neurobiology, School of Allied Health Sciences, Osaka University Faculty of Medicine, Yamadaoka 1-7, Suita-shi, Osaka, 565-0871, Japan.
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Tanaka H, Miyazaki N, Oashi K, Teramoto S, Shiratori M, Hashimoto M, Ohmichi M, Abe S. IL-18 might reflect disease activity in mild and moderate asthma exacerbation. J Allergy Clin Immunol 2001; 107:331-6. [PMID: 11174201 DOI: 10.1067/mai.2001.112275] [Citation(s) in RCA: 112] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND IL-18, identified as an IFN-gamma-inducing factor, is a proinflammatory cytokine that plays an important role in TH1 cell activation. Recently, it was reported that histamine induced IL-18 and that IL-18 might act as a coinducer of TH1 and TH2 cytokines. OBJECTIVE The aim was to evaluate the contribution of IL-18 to asthma exacerbation. METHODS Serum IL-18, soluble IL-2 receptor, eosinophil cationic protein, and plasma IFN-gamma levels, as well as peak expiratory flow were measured in patients with stable asthma (n = 28), acute mild or moderate asthma (n = 23), or pulmonary sarcoidosis (n = 35) and in healthy subjects (n = 26). We compared the serum IL-18 levels between patients with acute asthma and those in remission and examined the time course in acute exacerbation after asthma therapy. RESULTS Significantly higher serum IL-18 levels were found in patients with acute asthma (215 +/- 33 pg/mL, mean +/- SE; P = .02) and pulmonary sarcoidosis (239 +/- 27 pg/mL, P = .008) than in control subjects (127 +/- 11 pg/mL), but the plasma IFN-gamma level was significantly elevated in only pulmonary sarcoidosis (P < .001). In pulmonary sarcoidosis the IL-18 values significantly correlated with the IFN-gamma levels (r = 0.61, P < .001), but in acute asthma they did not. The IL-18 levels during acute asthma exacerbation were significantly higher (P = .01) than on remission days. In acute asthma, circulating IL-18 levels significantly correlated with serum soluble IL-2 receptor levels (r = 0.77, P < .0001) but not with serum eosinophil cationic protein levels. The IL-18 level had a tendency to inversely correlate with peak expiratory flow. The elevated IL-18 levels in acute asthma quickly decreased on day 3 (P = .02) and day 7 (P = .002) after therapy. CONCLUSION It was suggested that IL-18 may play a potential role to activate immunologic responses and may reflect disease activity in mild and moderate asthma exacerbation.
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Affiliation(s)
- H Tanaka
- Third Department of Internal Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
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Abstract
The biological characteristics of right-sided colon cancer were examined in 74 colon cancers with regard to clinicopathological parameters, proliferative activity and p53 expression. Significant differences between right-sided and left-sided colon cancer were found in age, tumor size, histological type and lymphatic vessel invasion. The proliferating cell nuclear antigen labeling index did not significantly differ between the two cancers. The frequency of p53 overexpression was lower in the former than in the latter. The results suggested that right-sided colon cancer did not differ from left-sided colon cancer in proliferative activity except for its tendency to be locally advanced and to differ in carcinogenesis.
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Affiliation(s)
- Y Iwatani
- The Department of Gastroenterological Surgery, Hyogo Prefectural Kaibara Hospital, Hikami-Gun, Hyogo 669-3395, Japan.
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Minh TB, Watanabe M, Tanabe S, Miyazaki N, Jefferson TA, Prudente MS, Subramanian A, Karuppiah S. Widespread contamination by tris(4-chlorophenyl)methane and tris(4-chlorophenyl)methanol in cetaceans from the North Pacific and Asian coastal waters. Environ Pollut 2000; 110:459-468. [PMID: 15092825 DOI: 10.1016/s0269-7491(99)00316-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/1999] [Accepted: 11/10/1999] [Indexed: 05/24/2023]
Abstract
For understanding global distribution, transport and behavior of tris(4-chlorophenyl)methane (TCPMe) and tris(4-chlorophenyl)methanol (TCPMOH), the two newly identified microcontaminants, the present study determined their concentrations and other persistent organochlorines (OCs) in the blubber of nine species of adult male cetaceans collected from various locations in the North Pacific Ocean and coastal waters of some Asian countries, during 1985-97. Concentrations of TCPMe and TCPMOH were found to be highest in northern right whale dolphins, which may be attributable to wide distribution of this species, including some heavily polluted areas such as coastal California. Elevated residue levels of TCPMe and TCPMOH were observed in both off-shore and coastal species, suggesting widespread contamination of these compounds in the marine environment. Higher contamination of TCPMe and TCPMOH was found in cetaceans from temperate and cold waters than those from tropical regions. The latitudinal distribution of TCPMe and TCPMOH in cetaceans from the North Pacific and Asian coastal waters was similar to that of DDTs, suggesting less transportable nature of TCPMe and TCPMOH in the marine environment. Data on the occurrence of TCPMe and TCPMOH further indicated high bioaccumulation potential of these compounds, which was comparable to DDTs. Relative concentrations of TCPMe/TCPMOH in cetaceans were apparently higher than those observed in seals, suggestive of lower metabolic capacity for these compounds in cetaceans than in pinnipeds, which is similar to classic contaminants like polychlorinated biphenyls and DDTs.
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Affiliation(s)
- T B Minh
- Center for Marine Environmental Studies, Ehime University, Tarumi 3-5-7, Matsuyama 790-8566, Japan
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