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Kikkawa S, Fujiki Y, Chudatemiya V, Nagakari H, Shibusawa K, Hirayama J, Nakatani N, Yamazoe S. Water-Tolerant Superbase Polyoxometalate [H 2(Nb 6O 19)] 6- for Homogeneous Catalysis. Angew Chem Int Ed Engl 2024; 63:e202401526. [PMID: 38388816 DOI: 10.1002/anie.202401526] [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: 02/20/2024] [Accepted: 02/21/2024] [Indexed: 02/24/2024]
Abstract
Here, doubly protonated Lindqvist-type niobium oxide cluster [H2(Nb6O19)]6-, fabricated by microwave-assisted hydrothermal synthesis, exhibited superbase catalysis for Knoevenagel and crossed aldol condensation reactions accompanied by activating C-H bond with pKa >26 and proton abstraction from a base indicator with pKa=26.5. Surprisingly, [H2(Nb6O19)]6- exhibited water-tolerant superbase properties for Knoevenagel and crossed aldol condensation reactions in the presence of water, although it is well known that the strong basicity of metal oxides and organic superbase is typically lost by the adsorption of water. Density functional theory calculation revealed that the basic surface oxygens that share the corner of NbO6 units in [H2(Nb6O19)]8- maintained the negative charges even after proton adsorption. This proton capacity and the presence of un-protonated basic sites led to the water tolerance of the superbase catalysis.
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Affiliation(s)
- Soichi Kikkawa
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan
- Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, 1-30, Goryo-Ohara, Nishikyo-ku, Kyoto, 615-8245, Japan
| | - Yu Fujiki
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan
| | - Vorakit Chudatemiya
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan
| | - Hiroki Nagakari
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan
| | - Kazuki Shibusawa
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan
| | - Jun Hirayama
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan
- Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, 1-30, Goryo-Ohara, Nishikyo-ku, Kyoto, 615-8245, Japan
| | - Naoki Nakatani
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan
| | - Seiji Yamazoe
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan
- Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, 1-30, Goryo-Ohara, Nishikyo-ku, Kyoto, 615-8245, Japan
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST) 4-1-8, Honcho, Kawaguchi, Saitama, 332-0012, Japan
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Kobayashi-Sun J, Kobayashi I, Kashima M, Hirayama J, Kakikawa M, Yamada S, Suzuki N. Extremely low-frequency electromagnetic fields facilitate both osteoblast and osteoclast activity through Wnt/β-catenin signaling in the zebrafish scale. Front Cell Dev Biol 2024; 12:1340089. [PMID: 38385024 PMCID: PMC10879286 DOI: 10.3389/fcell.2024.1340089] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 01/26/2024] [Indexed: 02/23/2024] Open
Abstract
Electromagnetic fields (EMFs) have received widespread attention as effective, noninvasive, and safe therapies across a range of clinical applications for bone disorders. However, due to the various frequencies of devices, their effects on tissues/cells are vary, which has been a bottleneck in understanding the effects of EMFs on bone tissue. Here, we developed an in vivo model system using zebrafish scales to investigate the effects of extremely low-frequency EMFs (ELF-EMFs) on fracture healing. Exposure to 10 millitesla (mT) of ELF-EMFs at 60 Hz increased the number of both osteoblasts and osteoclasts in the fractured scale, whereas 3 or 30 mT did not. Gene expression analysis revealed that exposure to 10 mT ELF-EMFs upregulated wnt10b and Wnt target genes in the fractured scale. Moreover, β-catenin expression was enhanced by ELF-EMFs predominantly at the fracture site of the zebrafish scale. Inhibition of Wnt/β-catenin signaling by IWR-1-endo treatment reduced both osteoblasts and osteoclasts in the fractured scale exposed to ELF-EMFs. These results suggest that ELF-EMFs promote both osteoblast and osteoclast activity through activation of Wnt/β-catenin signaling in fracture healing. Our data provide in vivo evidence that ELF-EMFs generated with a widely used commercial AC power supply have a facilitative effect on fracture healing.
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Affiliation(s)
- Jingjing Kobayashi-Sun
- Department of Clinical Engineering, Faculty of Health Science, Komatsu University, Komatsu, Ishikawa, Japan
- Faculty of Biological Science and Technology, Institute of Science and Engineering, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Isao Kobayashi
- Faculty of Biological Science and Technology, Institute of Science and Engineering, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Makoto Kashima
- Department of Biomolecular Science, Faculty of Science, Toho University, Funabashi, Chiba, Japan
| | - Jun Hirayama
- Department of Clinical Engineering, Faculty of Health Science, Komatsu University, Komatsu, Ishikawa, Japan
| | - Makiko Kakikawa
- Faculty of Biological Science and Technology, Institute of Science and Engineering, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Sotoshi Yamada
- Department of Production System Engineering and Sciences, Faculty of Production System Engineering and Sciences, Komatsu University, Komatsu, Ishikawa, Japan
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Nobuo Suzuki
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Kanazawa, Ishikawa, Japan
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Watanabe K, Maruyama Y, Iwashita H, Kato H, Hirayama J, Hattori A. N1-Acetyl-5-methoxykynuramine, which decreases in the hippocampus with aging, improves long-term memory via CaMKII/CREB phosphorylation. J Pineal Res 2024; 76:e12934. [PMID: 38241676 DOI: 10.1111/jpi.12934] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 12/12/2023] [Accepted: 12/17/2023] [Indexed: 01/21/2024]
Abstract
Melatonin is a molecule ubiquitous in nature and involved in several physiological functions. In the brain, melatonin is converted to N1-acetyl-N2-formyl-5-methoxykynuramine (AFMK) and then to N1-acetyl-5-methoxykynuramine (AMK), which has been reported to strongly enhance long-term object memory formation. However, the synthesis of AMK in brain tissues and the underlying mechanisms regarding memory formation remain largely unknown. In the present study, young and old individuals from a melatonin-producing strain, C3H/He mice, were employed. The amount of AMK in the pineal gland and plasma was very low compared with those of melatonin at night; conversely, in the hippocampus, the amount of AMK was higher than that of melatonin. Indoleamine 2, 3-dioxygenase (Ido) mRNA was expressed in multiple brain tissues, whereas tryptophan 2,3-dioxygenase (Tdo) mRNA was expressed only in the hippocampus, and its lysate had melatonin to AFMK conversion activity, which was blocked by the TDO inhibitor. The expression levels of phosphorylated cAMP response element binding protein (CREB) and PSD-95 in whole hippocampal tissue were significantly increased with AMK treatment. Before increasing in the whole tissue, CREB phosphorylation was significantly enhanced in the nuclear fraction. In the Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis, we found that downregulated genes in hippocampus of old C3H/He mice were more enriched for long-term potentiation (LTP) pathway. Gene set enrichment analysis showed that LTP and neuroactive receptor interaction gene sets were enriched in hippocampus of old mice. In addition, Ido1 and Tdo mRNA expression was significantly decreased in the hippocampus of old mice compared with young mice, and the decrease in Tdo mRNA was more pronounced than Ido1. Furthermore, there was a higher decrease in AMK levels, which was less than 1/10 that of young mice, than in melatonin levels in the hippocampus of old mice. In conclusion, we first demonstrated the Tdo-related melatonin to AMK metabolism in the hippocampus and suggest a novel mechanism of AMK involved in LTP and memory formation. These results support AMK as a potential therapeutic agent to prevent memory decline.
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Affiliation(s)
- Kazuki Watanabe
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Komatsu, Ishikawa, Japan
| | - Yusuke Maruyama
- Department of Sport and Wellness, College of Sport and Wellness, Rikkyo University, Niiza, Saitama, Japan
| | - Hikaru Iwashita
- Department of Anatomy, Faculty of Medicine, Kansai Medical University, Hirakata, Osaka, Japan
- Department of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, Chiyoda-ku, Tokyo, Japan
| | - Haruyasu Kato
- Department of Sport and Wellness, College of Sport and Wellness, Rikkyo University, Niiza, Saitama, Japan
| | - Jun Hirayama
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Komatsu, Ishikawa, Japan
- Division of Health Sciences, Graduate School of Sustainable Systems Science, Komatsu University, Komatsu, Ishikawa, Japan
| | - Atsuhiko Hattori
- Department of Sport and Wellness, College of Sport and Wellness, Rikkyo University, Niiza, Saitama, Japan
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba, Japan
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Ikari T, Hirayama J, Rafiuddin MA, Furusawa Y, Tabuchi Y, Watanabe K, Hattori A, Kawashima R, Nakamura K, Srivastav AK, Toyota K, Matsubara H, Suzuki N. Data on plasma cortisol levels in nibbler fish Girella punctata reared under high-density conditions in either surface seawater or deep ocean water. Data Brief 2023; 49:109361. [PMID: 37496521 PMCID: PMC10365972 DOI: 10.1016/j.dib.2023.109361] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 06/26/2023] [Indexed: 07/28/2023] Open
Abstract
Deep ocean water (DOW) is the water obtained from depth of >200 m below the surface of Earth's oceans and is characterized by rich nutrients and cleanliness [1,2]. We have recently reported that DOW suppresses the high-density-induced increase of plasma cortisol levels (i.e., a stress marker) in Japanese flounder (Paralichthys olivaceus) [1]. The current study aimed to examine whether the cortisol-reducing effect of DOW was observed in other marine organisms as well by comparing the plasma cortisol levels of nibbler fish Girella punctata reared under high-density conditions between surface seawater (SSW) and DOW. The nibbler fish were caught from Tsukumo Bay of Noto Peninsula (Ishikawa Prefecture, Japan). The DOW was obtained from seawater 320 m below the Noto Bay surface at a facility (Aquas Noto, Ishikawa Prefecture, Japan), whereas SSW was obtained from Tsukumo Bay (Noto Peninsula, Ishikawa Prefecture). The dissolved oxygen was maintained at approximately 7 mg/L in DOW as well as in SSW. Before they were transferred to the high-density condition, nibbler fish were acclimated in SSW at 20°C for 1 week at a mean density of 100 g/62.5 L. To expose them to the high-density stress, each of fish was kept at a density of 10 kg/m3 in a single aquarium (60 × 25 × 30 cm) containing either SSW or DOW (n = 8). Subsequently, the fish were reared with SSW or DOW for 10 days at 20°C ± 1°C under a 12:12-h light-dark cycle. A heparin containing syringe was used to obtain the blood samples from the caudal vessels of the fish anesthetized with a 0.04% 2-phenoxyethanol (FUJIFILM Wako Pure Chemical Corporation). The blood sampling was performed on days 0, 5, and 10 after rearing in the small aquaria. The plasma samples were prepared from the collected blood by centrifuging it at 5200 × g for 5 min and the cortisol concentrations were determined using an enzyme-linked immunosorbent assay (ELISA) kit (Cosmo Bio Co. Ltd., Tokyo, Japan) from those samples. The plasma cortisol concentration of nibbler fish reared in SSW on day 10 was significantly higher than that on day 0, whereas those reared in DOW did not show significant difference on the respective days. The current data contributes to the generalization of the cortisol-reducing effect of DOW on fish, which has been proposed in Japanese flounder [1]. These data could be used for developing and designing experiments to analyze the mechanisms underlying the cortisol-reducing effects by using small fish such as zebrafish, a well-established animal model.
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Affiliation(s)
- Takahiro Ikari
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa 927-0553, Japan
| | - Jun Hirayama
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Komatsu, Ishikawa 923-0961, Japan
- Division of Health Sciences, Graduate School of Sustainable Systems Science, Komatsu University, Komatsu, Ishikawa 923-0961, Japan
| | - Muhammad Ahya Rafiuddin
- Noto Center for Fisheries Science and Technology, Kanazawa University, Ossaka, Noto-cho, Ishikawa 927-0552, Japan
| | - Yukihiro Furusawa
- Department of Pharmaceutical Engineering, Faculty of Engineering, Toyama Prefectural University, Kurokawa, Toyama 939-0398, Japan
| | - Yoshiaki Tabuchi
- Life Science Research Center, University of Toyama, Sugitani, Toyama 930-0194, Japan
| | - Kazuki Watanabe
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Komatsu, Ishikawa 923-0961, Japan
| | - Atsuhiko Hattori
- Department of Sport and Wellness, College of Sport and Wellness, Rikkyo University, Kitano, Niiza, Saitama 352-8558, Japan
| | - Ryotaro Kawashima
- Division of Health Sciences, Graduate School of Sustainable Systems Science, Komatsu University, Komatsu, Ishikawa 923-0961, Japan
| | - Kitaro Nakamura
- Division of Health Sciences, Graduate School of Sustainable Systems Science, Komatsu University, Komatsu, Ishikawa 923-0961, Japan
| | - Ajai K. Srivastav
- Department of Zoology, D.D.U. Gorakhpur University, Gorakhpur 273-009, India
| | - Kenji Toyota
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa 927-0553, Japan
| | - Hajime Matsubara
- Noto Center for Fisheries Science and Technology, Kanazawa University, Ossaka, Noto-cho, Ishikawa 927-0552, Japan
| | - Nobuo Suzuki
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa 927-0553, Japan
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5
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Fujiki Y, Matsuyama T, Kikkawa S, Hirayama J, Takaya H, Nakatani N, Yasuda N, Nitta K, Negishi Y, Yamazoe S. Counteranion-induced structural isomerization of phosphine-protected PdAu 8 and PtAu 8 clusters. Commun Chem 2023; 6:129. [PMID: 37340116 DOI: 10.1038/s42004-023-00929-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 06/12/2023] [Indexed: 06/22/2023] Open
Abstract
Controlling the geometric structures of metal clusters through structural isomerization allows for tuning of their electronic state. In this study, we successfully synthesized butterfly-motif [PdAu8(PPh3)8]2+ (PdAu8-B, B means butterfly-motif) and [PtAu8(PPh3)8]2+ (PtAu8-B) by the structural isomerization from crown-motif [PdAu8(PPh3)8]2+ (PdAu8-C, C means crown-motif) and [PtAu8(PPh3)8]2+ (PtAu8-C), induced by association with anionic polyoxometalate, [Mo6O19]2- (Mo6) respectively, whereas their structural isomerization was suppressed by the use of [NO3]- and [PMo12O40]3- as counter anions. DR-UV-vis-NIR and XAFS analyses and density functional theory calculations revealed that the synthesized [PdAu8(PPh3)8][Mo6O19] (PdAu8-Mo6) and [PtAu8(PPh3)8][Mo6O19] (PtAu8-Mo6) had PdAu8-B and PtAu8-B respectively because PdAu8-Mo6 and PtAu8-Mo6 had bands in optical absorption at the longer wavelength region and different structural parameters characteristic of the butterfly-motif structure obtained by XAFS analysis. Single-crystal and powder X-ray diffraction analyses revealed that PdAu8-B and PtAu8-B were surrounded by six Mo6 with rock salt-type packing, which stabilizes the semi-stable butterfly-motif structure to overcome high activation energy for structural isomerization.
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Affiliation(s)
- Yu Fujiki
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan
| | - Tomoki Matsuyama
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan
| | - Soichi Kikkawa
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan
- Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto, 615-8245, Japan
| | - Jun Hirayama
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan
- Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto, 615-8245, Japan
| | - Hikaru Takaya
- Department of Life & Health Sciences, Teikyo University of Science, 2-2-1 Senjyusakuragi, Adachi-ku, Tokyo, 120-0045, Japan
| | - Naoki Nakatani
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan
| | - Nobuhiro Yasuda
- Center for Synchrotron Radiation Research, Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Kiyofumi Nitta
- Center for Synchrotron Radiation Research, Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Yuichi Negishi
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Seiji Yamazoe
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan.
- Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto, 615-8245, Japan.
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Kawaguchi, Saitama, 332-0012, Japan.
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Ikari T, Furusawa Y, Tabuchi Y, Maruyama Y, Hattori A, Kitani Y, Toyota K, Nagami A, Hirayama J, Watanabe K, Shigematsu A, Rafiuddin MA, Ogiso S, Fukushi K, Kuroda K, Hatano K, Sekiguchi T, Kawashima R, Srivastav AK, Nishiuchi T, Sakatoku A, Yoshida MA, Matsubara H, Suzuki N. Kynurenine promotes Calcitonin secretion and reduces cortisol in the Japanese flounder Paralichthys olivaceus. Sci Rep 2023; 13:8700. [PMID: 37248272 DOI: 10.1038/s41598-023-35222-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 05/15/2023] [Indexed: 05/31/2023] Open
Abstract
Deep ocean water (DOW) exerts positive effects on the growth of marine organisms, suggesting the presence of unknown component(s) that facilitate their aquaculture. We observed that DOW suppressed plasma cortisol (i.e., a stress marker) concentration in Japanese flounder (Paralichthys olivaceus) reared under high-density condition. RNA-sequencing analysis of flounder brains showed that when compared to surface seawater (SSW)-reared fish, DOW-reared fish had lower expression of hypothalamic (i.e., corticotropin-releasing hormone) and pituitary (i.e., proopiomelanocortin, including adrenocorticotropic hormone) hormone-encoding genes. Moreover, DOW-mediated regulation of gene expression was linked to decreased blood cortisol concentration in DOW-reared fish. Our results indicate that DOW activated osteoblasts in fish scales and facilitated the production of Calcitonin, a hypocalcemic hormone that acts as an analgesic. We then provide evidence that the Calcitonin produced is involved in the regulatory network of genes controlling cortisol secretion. In addition, the indole component kynurenine was identified as the component responsible for osteoblast activation in DOW. Furthermore, kynurenine increased plasma Calcitonin concentrations in flounders reared under high-density condition, while it decreased plasma cortisol concentration. Taken together, we propose that kynurenine in DOW exerts a cortisol-reducing effect in flounders by facilitating Calcitonin production by osteoblasts in the scales.
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Grants
- 22009, 22015, 22016, 22017, 22044 The cooperative research program of the Institute of Nature and Environmental Technology, Kanazawa University
- 22009, 22015, 22016, 22017, 22044 The cooperative research program of the Institute of Nature and Environmental Technology, Kanazawa University
- 22009, 22015, 22016, 22017, 22044 The cooperative research program of the Institute of Nature and Environmental Technology, Kanazawa University
- 22009, 22015, 22016, 22017, 22044 The cooperative research program of the Institute of Nature and Environmental Technology, Kanazawa University
- 22009, 22015, 22016, 22017, 22044 The cooperative research program of the Institute of Nature and Environmental Technology, Kanazawa University
- 20K06718, 21K05725, 22J01508 JSPS
- 20K06718, 21K05725, 22J01508 JSPS
- 20K06718, 21K05725, 22J01508 JSPS
- 2209 The Salt Science Research Foundation
- JPMJTM19AP JST
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Affiliation(s)
- Takahiro Ikari
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-Cho, Ishikawa, 927-0553, Japan
| | - Yukihiro Furusawa
- Department of Pharmaceutical Engineering, Faculty of Engineering, Toyama Prefectural University, Kurokawa, Toyama, 939-0398, Japan
| | - Yoshiaki Tabuchi
- Life Science Research Center, University of Toyama, Sugitani, Toyama, 930-0194, Japan
| | - Yusuke Maruyama
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba, 272-0827, Japan
| | - Atsuhiko Hattori
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba, 272-0827, Japan
| | - Yoichiro Kitani
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-Cho, Ishikawa, 927-0553, Japan
| | - Kenji Toyota
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-Cho, Ishikawa, 927-0553, Japan
| | - Arata Nagami
- Noto Center for Fisheries Science and Technology, Kanazawa University, Osaka, Noto-Cho, Ishikawa, 927-0552, Japan
| | - Jun Hirayama
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Komatsu, Ishikawa, 923-0961, Japan
| | - Kazuki Watanabe
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba, 272-0827, Japan
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Komatsu, Ishikawa, 923-0961, Japan
| | - Atsushi Shigematsu
- Noto Center for Fisheries Science and Technology, Kanazawa University, Osaka, Noto-Cho, Ishikawa, 927-0552, Japan
| | - Muhammad Ahya Rafiuddin
- Noto Center for Fisheries Science and Technology, Kanazawa University, Osaka, Noto-Cho, Ishikawa, 927-0552, Japan
| | - Shouzo Ogiso
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-Cho, Ishikawa, 927-0553, Japan
| | - Keisuke Fukushi
- Institute of Nature and Environmental Technology, Kanazawa University, Kakuma, Kanazawa, Ishikawa, 920-1192, Japan
| | - Kohei Kuroda
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-Cho, Ishikawa, 927-0553, Japan
| | - Kaito Hatano
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-Cho, Ishikawa, 927-0553, Japan
| | - Toshio Sekiguchi
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-Cho, Ishikawa, 927-0553, Japan
| | - Ryotaro Kawashima
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Komatsu, Ishikawa, 923-0961, Japan
| | - Ajai K Srivastav
- Department of Zoology, D.D.U. Gorakhpur University, Gorakhpur, 273-009, India
| | - Takumi Nishiuchi
- Bioscience Core Facility, Research Center for Experimental Modeling of Human Disease, Kanazawa University, Takara-Machi, Kanazawa, Ishikawa, 920-1192, Japan
| | - Akihiro Sakatoku
- School of Science, Academic Assembly, University of Toyama, Gofuku, Toyama, 930-8555, Japan
| | - Masa-Aki Yoshida
- Marine Biological Science Section, Education and Research Center for Biological Resources, Faculty of Life and Environmental Science, Shimane University, Oki, Shimane, 685-0024, Japan
| | - Hajime Matsubara
- Noto Center for Fisheries Science and Technology, Kanazawa University, Osaka, Noto-Cho, Ishikawa, 927-0552, Japan
| | - Nobuo Suzuki
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-Cho, Ishikawa, 927-0553, Japan.
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Watanabe K, Nakano M, Maruyama Y, Hirayama J, Suzuki N, Hattori A. Nocturnal melatonin increases glucose uptake via insulin-independent action in the goldfish brain. Front Endocrinol (Lausanne) 2023; 14:1173113. [PMID: 37288290 PMCID: PMC10242130 DOI: 10.3389/fendo.2023.1173113] [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] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 05/09/2023] [Indexed: 06/09/2023] Open
Abstract
Melatonin, a neurohormone nocturnally produced by the pineal gland, is known to regulate the circadian rhythm. It has been recently reported that variants of melatonin receptors are associated with an increased risk of hyperglycemia and type 2 diabetes, suggesting that melatonin may be involved in the regulation of glucose homeostasis. Insulin is a key hormone that regulates circulating glucose levels and cellular metabolism after food intake in many tissues, including the brain. Although cells actively uptake glucose even during sleep and without food, little is known regarding the physiological effects of nocturnal melatonin on glucose homeostasis. Therefore, we presume the involvement of melatonin in the diurnal rhythm of glucose metabolism, independent of insulin action after food intake. In the present study, goldfish (Carassius auratus) was used as an animal model, since this species has no insulin-dependent glucose transporter type 4 (GLUT4). We found that in fasted individuals, plasma melatonin levels were significantly higher and insulin levels were significantly lower during the night. Furthermore, glucose uptake in the brain, liver, and muscle tissues also significantly increased at night. After intraperitoneal administration of melatonin, glucose uptake by the brain and liver showed significantly greater increases than in the control group. The administration of melatonin also significantly decreased plasma glucose levels in hyperglycemic goldfish, but failed to alter insulin mRNA expression in Brockmann body and plasma insulin levels. Using an insulin-free medium, we demonstrated that melatonin treatment increased glucose uptake in a dose-dependent manner in primary cell cultures of goldfish brain and liver cells. Moreover, the addition of a melatonin receptor antagonist decreased glucose uptake in hepatocytes, but not in brain cells. Next, treatment with N1-acetyl-5-methoxykynuramine (AMK), a melatonin metabolite in the brain, directly increased glucose uptake in cultured brain cells. Taken together, these findings suggest that melatonin is a possible circadian regulator of glucose homeostasis, whereas insulin acquires its effect on glucose metabolism following food intake.
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Affiliation(s)
- Kazuki Watanabe
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba, Japan
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Komatsu, Ishikawa, Japan
| | - Masaki Nakano
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba, Japan
| | - Yusuke Maruyama
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba, Japan
- Department of Sport and Wellness, College of Sport and Wellness, Rikkyo University, Niiza, Saitama, Japan
| | - Jun Hirayama
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Komatsu, Ishikawa, Japan
- Division of Health Sciences, Graduate School of Sustainable Systems Science, Komatsu University, Komatsu, Ishikawa, Japan
| | - Nobuo Suzuki
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Noto-Cho, Ishikawa, Japan
| | - Atsuhiko Hattori
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba, Japan
- Department of Sport and Wellness, College of Sport and Wellness, Rikkyo University, Niiza, Saitama, Japan
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8
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Hatano K, Yoshida MA, Hirayama J, Kitani Y, Hattori A, Ogiso S, Watabe Y, Sekiguchi T, Tabuchi Y, Urata M, Matsumoto K, Sakatoku A, Srivastav AK, Toyota K, Matsubara H, Suzuki N. Deep ocean water alters the cholesterol and mineral metabolism of squid Todarodes pacificus and suppresses its weight loss. Sci Rep 2023; 13:7591. [PMID: 37164992 PMCID: PMC10172372 DOI: 10.1038/s41598-023-34443-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 04/30/2023] [Indexed: 05/12/2023] Open
Abstract
This study is the first to demonstrate that deep ocean water (DOW) has physiological significant effects on squid. After 36 h of rearing squids, those reared with DOW had significantly higher total and free cholesterol levels and lower alanine transaminase activity in hemolymph as compared with those reared with surface sea water (SSW). SSW rearing also resulted in 6.95% weight loss, while DOW rearing caused only 2.5% weight loss, which might be due to liver metabolism suppression. Furthermore, both monovalent (sodium, chloride, and potassium ions) and divalent (calcium, inorganic phosphorus, and magnesium ions) ions in hemolymph were elevated when reared with DOW compared to those when reared with SSW. A study of genes expressed in the brain revealed that five genes were specifically remarked in DOW rearing. Most altered genes were neuropeptides, including those from vasopressin superfamily. These neuropeptides are involved in cholesterol and/or mineral metabolisms and physiological significant effects on squid. This study is the first report the effects of DOW on cholesterol and mineral metabolism of squid and will contribute to squid aquaculture using DOW.
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Affiliation(s)
- Kaito Hatano
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa, 927-0553, Japan
| | - Masa-Aki Yoshida
- Marine Biological Science Section, Education and Research Center for Biological Resources, Faculty of Life and Environmental Science, Shimane University, Oki, Shimane, 685-0024, Japan
| | - Jun Hirayama
- Department of Clinical Engineering, Faculty of Health Sciences and Division of Health Sciences, Graduate School of Sustainable Systems Science, Komatsu University, Komatsu, Ishikawa, 923-0961, Japan
| | - Yoichiro Kitani
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa, 927-0553, Japan
| | - Atsuhiko Hattori
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba, 272-0827, Japan
| | - Shouzo Ogiso
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa, 927-0553, Japan
| | - Yukina Watabe
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa, 927-0553, Japan
| | - Toshio Sekiguchi
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa, 927-0553, Japan
| | - Yoshiaki Tabuchi
- Life Science Research Center, University of Toyama, Sugitani, Toyama, 930-0194, Japan
| | - Makoto Urata
- Institute of Noto Satoumi Education and Studies, Ogi, Noto-cho, Ishikawa, 927-0553, Japan
| | - Kyoko Matsumoto
- Institute of Noto Satoumi Education and Studies, Ogi, Noto-cho, Ishikawa, 927-0553, Japan
| | - Akihiro Sakatoku
- School of Science, Academic Assembly, University of Toyama, Gofuku, Toyama, 930-8555, Japan
| | - Ajai K Srivastav
- Department of Zoology, D.D.U. Gorakhpur University, Gorakhpur, 273-009, India
| | - Kenji Toyota
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa, 927-0553, Japan
| | - Hajime Matsubara
- Noto Center for Fisheries Science and Technology, Kanazawa University, Ossaka, Noto-cho, Ishikawa, 927-0552, Japan
| | - Nobuo Suzuki
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa, 927-0553, Japan.
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9
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Ogiso S, Watanabe K, Maruyama Y, Miyake H, Hatano K, Hirayama J, Hattori A, Watabe Y, Sekiguchi T, Kitani Y, Furusawa Y, Tabuchi Y, Matsubara H, Nakagiri M, Toyota K, Sasayama Y, Suzuki N. Adaptation to the shallow sea floor environment of a species of marine worms, Oligobrachia mashikoi, generally inhabiting deep-sea water. Sci Rep 2023; 13:6299. [PMID: 37072482 PMCID: PMC10113264 DOI: 10.1038/s41598-023-33309-6] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 04/10/2023] [Indexed: 05/03/2023] Open
Abstract
Beard worms from the family Siboglinidae, are peculiar animals and are known for their symbiotic relationships with sulfur bacteria. Most Siboglinids inhabit the deep-sea floor, thus making difficult to make any observations in situ. One species, Oligobrachia mashikoi, occurs in the shallow depths (24.5 m) of the Sea of Japan. Taking advantage of its shallow-water habitat, the first ecological survey of O. mashikoi was performed over a course of 7 years, which revealed that its tentacle-expanding behavior was dependent on the temperature and illuminance of the sea water. Furthermore, there were significantly more O. mashikoi with expanding tentacles during the nighttime than during the daytime, and the prevention of light eliminated these differences in the number of expending tentacles. These results confirmed that the tentacle-expanding behavior is controlled by environmental light signals. Consistent with this, we identified a gene encoding a photoreceptor molecule, neuropsin, in O. mashikoi, and the expression thereof is dependent on the time of day. We assume that the described behavioral response of O. mashikoi to light signals represent an adaptation to a shallow-water environment within the predominantly deep-sea taxon.
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Affiliation(s)
- Shouzo Ogiso
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa, 927-0553, Japan
| | - Kazuki Watanabe
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba, 272-0827, Japan
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Komatsu, Ishikawa, 923-0961, Japan
| | - Yusuke Maruyama
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba, 272-0827, Japan
| | - Hiroshi Miyake
- School of Marine Biosciences, Kitasato University, Sagamihara, Kanagawa, 252-0373, Japan
| | - Kaito Hatano
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa, 927-0553, Japan
| | - Jun Hirayama
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Komatsu, Ishikawa, 923-0961, Japan
- Division of Health Sciences, Graduate School of Sustainable Systems Science, Komatsu University, Komatsu, Ishikawa, 923-0961, Japan
| | - Atsuhiko Hattori
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba, 272-0827, Japan
| | - Yukina Watabe
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa, 927-0553, Japan
| | - Toshio Sekiguchi
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa, 927-0553, Japan
| | - Yoichiro Kitani
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa, 927-0553, Japan
| | - Yukihiro Furusawa
- Department of Pharmaceutical Engineering, Faculty of Engineering, Toyama Prefectural University, Kurokawa, Toyama, 939-0398, Japan
| | - Yoshiaki Tabuchi
- Life Science Research Center, University of Toyama, Sugitani, Toyama, 930-0194, Japan
| | - Hajime Matsubara
- Noto Center for Fisheries Science and Technology, Kanazawa University, Ossaka, Noto-cho, Ishikawa, 927-0552, Japan
| | - Mana Nakagiri
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Komatsu, Ishikawa, 923-0961, Japan
| | - Kenji Toyota
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa, 927-0553, Japan
| | - Yuichi Sasayama
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa, 927-0553, Japan
| | - Nobuo Suzuki
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa, 927-0553, Japan.
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10
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Azuma N, Yokoi T, Tanaka T, Matsuzaka E, Saida Y, Nishina S, Terao M, Takada S, Fukami M, Okamura K, Maehara K, Yamasaki T, Hirayama J, Nishina H, Handa H, Yamaguchi Y. Integrator complex subunit 15 controls mRNA splicing and is critical for eye development. Hum Mol Genet 2023:7059315. [PMID: 36851842 DOI: 10.1093/hmg/ddad034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 02/16/2023] [Indexed: 03/01/2023] Open
Abstract
The eye and brain are composed of elaborately organized tissues, development of which is supported by spatiotemporally precise expression of a number of transcription factors and developmental regulators. Here we report the molecular and genetic characterization of Integrator complex subunit 15 (INTS15). INTS15 was identified in search for the causative gene(s) for an autosomal-dominant eye disease with variable individual manifestation found in a large pedigree. While homozygous Ints15 knockout mice are embryonic lethal, mutant mice lacking a small C-terminal region of Ints15 show ocular malformations similar to the human patients. INTS15 is highly expressed in the eye and brain during embryogenesis and stably interacts with the Integrator complex to support snRNA 3' end processing. Its knockdown resulted in missplicing of a large number of genes, probably as a secondary consequence, and substantially affected genes associated with eye and brain development. Moreover, studies using human iPS-derived neural progenitor cells showed that INTS15 is critical for axonal outgrowth in retinal ganglion cells. This study suggests a new link between general transcription machinery and a highly specific hereditary disease.
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Affiliation(s)
- Noriyuki Azuma
- Department of Ophthalmology and Laboratory for Visual Science, National Centre for Child Health and Development, Tokyo, Japan.,Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tadashi Yokoi
- Department of Ophthalmology and Laboratory for Visual Science, National Centre for Child Health and Development, Tokyo, Japan
| | - Taku Tanaka
- Department of Ophthalmology and Laboratory for Visual Science, National Centre for Child Health and Development, Tokyo, Japan.,Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | - Emiko Matsuzaka
- Department of Ophthalmology and Laboratory for Visual Science, National Centre for Child Health and Development, Tokyo, Japan
| | - Yuki Saida
- Department of Ophthalmology and Laboratory for Visual Science, National Centre for Child Health and Development, Tokyo, Japan
| | - Sachiko Nishina
- Department of Ophthalmology and Laboratory for Visual Science, National Centre for Child Health and Development, Tokyo, Japan
| | - Miho Terao
- Department of Systems BioMedicine, National Research Institute for Child Health and Development, Tokyo, Japan
| | - Shuji Takada
- Department of Systems BioMedicine, National Research Institute for Child Health and Development, Tokyo, Japan
| | - Maki Fukami
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - Kohji Okamura
- Department of Systems BioMedicine, National Research Institute for Child Health and Development, Tokyo, Japan
| | - Kayoko Maehara
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - Tokiwa Yamasaki
- Department of Physiology, School of Medicine, Keio University, Tokyo, Japan
| | - Jun Hirayama
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hiroshi Nishina
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hiroshi Handa
- Department of Chemical Biology, Tokyo Medical University, Tokyo, Japan
| | - Yuki Yamaguchi
- Department of Life Science and Technology, Tokyo Institute of Technology, Yokohama, Japan
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11
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Hirayama J, Hattori A, Takahashi A, Furusawa Y, Tabuchi Y, Shibata M, Nagamatsu A, Yano S, Maruyama Y, Matsubara H, Sekiguchi T, Suzuki N. Physiological consequences of space flight, including abnormal bone metabolism, space radiation injury, and circadian clock dysregulation: Implications of melatonin use and regulation as a countermeasure. J Pineal Res 2023; 74:e12834. [PMID: 36203395 DOI: 10.1111/jpi.12834] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [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: 08/30/2021] [Revised: 10/03/2022] [Accepted: 10/04/2022] [Indexed: 12/15/2022]
Abstract
Exposure to the space environment induces a number of pathophysiological outcomes in astronauts, including bone demineralization, sleep disorders, circadian clock dysregulation, cardiovascular and metabolic dysfunction, and reduced immune system function. A recent report describing experiments aboard the Space Shuttle mission, STS-132, showed that the level of melatonin, a hormone that provides the biochemical signal of darkness, was decreased during microgravity in an in vitro culture model. Additionally, abnormal lighting conditions in outer space, such as low light intensity in orbital spacecraft and the altered 24-h light-dark cycles, may result in the dysregulation of melatonin rhythms and the misalignment of the circadian clock from sleep and work schedules in astronauts. Studies on Earth have demonstrated that melatonin regulates various physiological functions including bone metabolism. These data suggest that the abnormal regulation of melatonin in outer space may contribute to pathophysiological conditions of astronauts. In addition, experiments with high-linear energy transfer radiation, a ground-based model of space radiation, showed that melatonin may serve as a protectant against space radiation. Gene expression profiling using an in vitro culture model exposed to space flight during the STS-132 mission, showed that space radiation alters the expression of DNA repair and oxidative stress response genes, indicating that melatonin counteracts the expression of these genes responsive to space radiation to promote cell survival. These findings implicate the use of exogenous melatonin and the regulation of endogenous melatonin as countermeasures for the physiological consequences of space flight.
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Affiliation(s)
- Jun Hirayama
- Department of Clinical Engineering, Faculty of Health Sciences & Division of Health Sciences, Graduate School of Sustainable Systems Science, Komatsu University, Komatsu, Japan
| | - Atsuhiko Hattori
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Japan
| | | | - Yukihiro Furusawa
- Department of Pharmaceutical Engineering, Faculty of Engineering, Toyama Prefectural University, Toyama, Japan
| | - Yoshiaki Tabuchi
- Life Science Research Center, University of Toyama, Toyama, Japan
| | - Masahiro Shibata
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Japan
| | | | - Sachiko Yano
- Japan Aerospace Exploration Agency, Tsukuba, Japan
| | - Yusuke Maruyama
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Japan
| | - Hajime Matsubara
- Noto Center for Fisheries Science and Technology, Kanazawa University, Noto-cho, Ishikawa, Japan
| | - Toshio Sekiguchi
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Noto-cho, Japan
| | - Nobuo Suzuki
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Noto-cho, Japan
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12
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Chudatemiya V, Kikkawa S, Hirayama J, Takahata R, Teranishi T, Tamura M, Yamazoe S. Bifunctional platinum‐incorporated polyoxoniobate derived catalyst for N‐formylation of piperidine using CO2. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200521] [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: 11/11/2022]
Affiliation(s)
- Vorakit Chudatemiya
- Tokyo Metropolitan University Graduate School of Science: Tokyo Toritsu Daigaku Rigakubu Daigakuin Rigaku Kenkyuka Chemistry 1-1 Minami-Osawa 192-0397 Hachioji-shi JAPAN
| | - Soichi Kikkawa
- Tokyo Metropolitan University Graduate School of Science: Tokyo Toritsu Daigaku Rigakubu Daigakuin Rigaku Kenkyuka Chemistry JAPAN
| | - Jun Hirayama
- Tokyo Metropolitan University Graduate School of Science: Tokyo Toritsu Daigaku Rigakubu Daigakuin Rigaku Kenkyuka Chemistry JAPAN
| | - Ryo Takahata
- Kyoto University: Kyoto Daigaku Institute for Chemical Research JAPAN
| | | | - Masazumi Tamura
- Osaka Metropolitan University: Osaka Koritsu Daigaku Research Center for Artificial Photosynthesis JAPAN
| | - Seiji Yamazoe
- Tokyo Metropolitan University Department of Chemistry, Graduate School of Science 1-1 Minami-Osawa, Hachioji 192-0397 Tokyo JAPAN
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13
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Hughes ATL, Attarian HP, Hirayama J. Editorial: The circadian circus – how our clocks keep us ticking. Front Neurosci 2022; 16:973727. [PMID: 36110095 PMCID: PMC9468928 DOI: 10.3389/fnins.2022.973727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 08/17/2022] [Indexed: 12/05/2022] Open
Affiliation(s)
- Alun Thomas Lloyd Hughes
- School of Biological and Environmental Sciences, Liverpool John Moores University, Liverpool, United Kingdom
- *Correspondence: Alun Thomas Lloyd Hughes
| | - Hrayr P. Attarian
- Center for Sleep Disorders, Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
- Hrayr P. Attarian
| | - Jun Hirayama
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Komatsu, Japan
- Division of Health Sciences, Graduate School of Sustainable Systems Science, Komatsu University, Komatsu, Japan
- Jun Hirayama
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14
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Kikkawa S, Fukuda S, Hirayama J, Shirai N, Takahata R, Suzuki K, Yamaguchi K, Teranishi T, Yamazoe S. Dual functional catalysis of [Nb 6O 19] 8--modified Au/Al 2O 3. Chem Commun (Camb) 2022; 58:9018-9021. [PMID: 35866742 DOI: 10.1039/d2cc02472a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A catalyst prepared by modifying the surface of Au nanoparticles (NPs) on Al2O3 with [Nb6O19]8- clusters had specific base and reduction abilities, and the reduction of p-nitrophenol to p-aminophenol using H2 as a reductant proceeded efficiently with the dual functional catalyst. At the interface between Au NPs and basic [Nb6O19]8-, heterolytically cleaved hydrogen species are generated, which can efficiently react with nitrophenolate ions generated by base catalysis. Moreover, this surface modification strategy was applicable to the reduction of other nitro compounds.
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Affiliation(s)
- Soichi Kikkawa
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-osawa, Hachioji, Tokyo 192-0397, Japan. .,Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto 615-8245, Japan
| | - Shoji Fukuda
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-osawa, Hachioji, Tokyo 192-0397, Japan.
| | - Jun Hirayama
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-osawa, Hachioji, Tokyo 192-0397, Japan. .,Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto 615-8245, Japan
| | - Naoki Shirai
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-osawa, Hachioji, Tokyo 192-0397, Japan.
| | - Ryo Takahata
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Kosuke Suzuki
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Tokyo 102-0076, Japan
| | - Kazuya Yamaguchi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Toshiharu Teranishi
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Seiji Yamazoe
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-osawa, Hachioji, Tokyo 192-0397, Japan. .,Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto 615-8245, Japan.,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Tokyo 102-0076, Japan
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15
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Kikkawa S, Amamoto K, Fujiki Y, Hirayama J, Kato G, Miura H, Shishido T, Yamazoe S. Direct Air Capture of CO 2 Using a Liquid Amine-Solid Carbamic Acid Phase-Separation System Using Diamines Bearing an Aminocyclohexyl Group. ACS Environ Au 2022; 2:354-362. [PMID: 37101968 PMCID: PMC10125313 DOI: 10.1021/acsenvironau.1c00065] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 04/28/2023]
Abstract
The phase separation between a liquid amine and the solid carbamic acid exhibited >99% CO2 removal efficiency under a 400 ppm CO2 flow system using diamines bearing an aminocyclohexyl group. Among them, isophorone diamine [IPDA; 3-(aminomethyl)-3,5,5-trimethylcyclohexylamine] exhibited the highest CO2 removal efficiency. IPDA reacted with CO2 in a CO2/IPDA molar ratio of ≥1 even in H2O as a solvent. The captured CO2 was completely desorbed at 333 K because the dissolved carbamate ion releases CO2 at low temperatures. The reusability of IPDA under CO2 adsorption-and-desorption cycles without degradation, the >99% efficiency kept for 100 h under direct air capture conditions, and the high CO2 capture rate (201 mmol/h for 1 mol of amine) suggest that the phase separation system using IPDA is robust and durable for practical use.
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Affiliation(s)
- Soichi Kikkawa
- Department
of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192−0397, Japan
- Elements
Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto 615−8245, Japan
| | - Kazushi Amamoto
- Department
of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192−0397, Japan
| | - Yu Fujiki
- Department
of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192−0397, Japan
| | - Jun Hirayama
- Department
of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192−0397, Japan
- Elements
Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto 615−8245, Japan
| | - Gen Kato
- Department
of Applied Chemistry for Environment, Graduate School of Urban Environmental
Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192−0397, Japan
| | - Hiroki Miura
- Elements
Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto 615−8245, Japan
- Research
Center for Hydrogen Energy-Based Society, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192−0397, Japan
- Department
of Applied Chemistry for Environment, Graduate School of Urban Environmental
Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192−0397, Japan
| | - Tetsuya Shishido
- Elements
Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto 615−8245, Japan
- Research
Center for Hydrogen Energy-Based Society, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192−0397, Japan
- Department
of Applied Chemistry for Environment, Graduate School of Urban Environmental
Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192−0397, Japan
| | - Seiji Yamazoe
- Department
of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192−0397, Japan
- Elements
Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto 615−8245, Japan
- Research
Center for Hydrogen Energy-Based Society, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192−0397, Japan
- Precursory
Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8, Honcho, Kawaguchi, Saitama 332-0012, Japan
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16
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Yamamoto T, Ikegame M, Furusawa Y, Tabuchi Y, Hatano K, Watanabe K, Kawago U, Hirayama J, Yano S, Sekiguchi T, Kitamura KI, Endo M, Nagami A, Matsubara H, Maruyama Y, Hattori A, Suzuki N. Osteoclastic and Osteoblastic Responses to Hypergravity and Microgravity: Analysis Using Goldfish Scales as a Bone Model. Zoolog Sci 2022; 39. [DOI: 10.2108/zs210107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 02/13/2022] [Indexed: 11/17/2022]
Affiliation(s)
- Tatsuki Yamamoto
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Housu-gun, Ishikawa 927-0553, Japan
| | - Mika Ikegame
- Department of Oral Morphology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Okayama 700-8525, Japan
| | - Yukihiro Furusawa
- Department of Pharmaceutical Engineering, Faculty of Engineering, Toyama Prefectural University, Kurokawa, Toyama 939-0398, Japan
| | - Yoshiaki Tabuchi
- Life Science Research Center, University of Toyama, Sugitani, Toyama 930-0194, Japan
| | - Kaito Hatano
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Housu-gun, Ishikawa 927-0553, Japan
| | - Kazuki Watanabe
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba 272-0827, Japan
| | - Umi Kawago
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Housu-gun, Ishikawa 927-0553, Japan
| | - Jun Hirayama
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Komatsu, Ishikawa 923-0961, Japan
| | - Sachiko Yano
- Japan Aerospace Exploration Agency, Tsukuba, Ibaraki 305-8505, Japan
| | - Toshio Sekiguchi
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Housu-gun, Ishikawa 927-0553, Japan
| | - Kei-ichiro Kitamura
- Department of Clinical Laboratory Science, Division of Health Sciences, Graduate School of Medical Science, Kanazawa University, Kodatsuno, Ishikawa 920-0942, Japan
| | - Masato Endo
- Laboratory of Fish Culture, Tokyo University of Marine Science and Technology, Minato-ku, Tokyo 108-8477, Japan
| | - Arata Nagami
- Noto Center for Fisheries Science and Technology, Kanazawa University, Ossaka, Noto-cho, Ishikawa 927-0552, Japan
| | - Hajime Matsubara
- Noto Center for Fisheries Science and Technology, Kanazawa University, Ossaka, Noto-cho, Ishikawa 927-0552, Japan
| | - Yusuke Maruyama
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba 272-0827, Japan
| | - Atsuhiko Hattori
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba 272-0827, Japan
| | - Nobuo Suzuki
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Housu-gun, Ishikawa 927-0553, Japan
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17
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Suzuki N, Honda M, Sato M, Yoshitake S, Kawabe K, Tabuchi Y, Omote T, Sekiguchi T, Furusawa Y, Toriba A, Tang N, Shimasaki Y, Nagato EG, Zhang L, Srivastav AK, Amornsakun T, Kitani Y, Matsubara H, Yazawa T, Hirayama J, Hattori A, Oshima Y, Hayakawa K. Hydroxylated benzo[c]phenanthrene metabolites cause osteoblast apoptosis and skeletal abnormalities in fish. Ecotoxicol Environ Saf 2022; 234:113401. [PMID: 35298967 DOI: 10.1016/j.ecoenv.2022.113401] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 02/19/2022] [Accepted: 03/06/2022] [Indexed: 06/14/2023]
Abstract
To study the toxicity of 3-hydroxybenzo[c]phenanthrene (3-OHBcP), a metabolite of benzo[c]phenanthrene (BcP), first we compared it with its parent compound, BcP, using an in ovo-nanoinjection method in Japanese medaka. Second, we examined the influence of 3-OHBcP on bone metabolism using goldfish. Third, the detailed mechanism of 3-OHBcP on bone metabolism was investigated using zebrafish and goldfish. The LC50s of BcP and 3-OHBcP in Japanese medaka were 5.7 nM and 0.003 nM, respectively, indicating that the metabolite was more than 1900 times as toxic as the parent compound. In addition, nanoinjected 3-OHBcP (0.001 nM) induced skeletal abnormalities. Therefore, fish scales with both osteoblasts and osteoclasts on the calcified bone matrix were examined to investigate the mechanisms of 3-OHBcP toxicity on bone metabolism. We found that scale regeneration in the BcP-injected goldfish was significantly inhibited as compared with that in control goldfish. Furthermore, 3-OHBcP was detected in the bile of BcP-injected goldfish, indicating that 3-OHBcP metabolized from BcP inhibited scale regeneration. Subsequently, the toxicity of BcP and 3-OHBcP to osteoblasts was examined using an in vitro assay with regenerating scales. The osteoblastic activity in the 3-OHBcP (10-10 to 10-7 M)-treated scales was significantly suppressed, while BcP (10-11 to 10-7 M)-treated scales did not affect osteoblastic activity. Osteoclastic activity was unchanged by either BcP or 3-OHBcP treatment at each concentration (10-11 to 10-7 M). The detailed toxicity of 3-OHBcP (10-9 M) in osteoblasts was then examined using gene expression analysis on a global scale with fish scales. Eight genes, including APAF1, CHEK2, and FOS, which are associated with apoptosis, were identified from the upregulated genes. This indicated that 3-OHBcP treatment induced apoptosis in fish scales. In situ detection of cell death by TUNEL methods was supported by gene expression analysis. This study is the first to demonstrate that 3-OHBcP, a metabolite of BcP, has greater toxicity than the parent compound, BcP.
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Affiliation(s)
- Nobuo Suzuki
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Noto-cho, Ishikawa 927-0553, Japan.
| | - Masato Honda
- Botanical Garden, Institute of Nature and Environmental Technology, Kanazawa University, Kakuma-machi, Ishikawa 920-1192, Japan
| | - Masayuki Sato
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Noto-cho, Ishikawa 927-0553, Japan
| | - Shuhei Yoshitake
- Laboratory of Marine Environmental Science, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Kimi Kawabe
- Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma, Ishikawa 920-1192, Japan
| | - Yoshiaki Tabuchi
- Life Science Research Center, University of Toyama, Sugitani, Toyama 930-0194, Japan
| | - Toshiki Omote
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Noto-cho, Ishikawa 927-0553, Japan
| | - Toshio Sekiguchi
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Noto-cho, Ishikawa 927-0553, Japan
| | - Yukihiro Furusawa
- Department of Pharmaceutical Engineering, Faculty of Engineering, Toyama Prefectural University, Kurokawa, Toyama 939-0398, Japan
| | - Akira Toriba
- Graduate School of Biomedical Sciences, Nagasaki University, Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Ning Tang
- Institute of Nature and Environmental Technology, Kanazawa University, Kakuma-machi, Ishikawa 920-1192, Japan
| | - Yohei Shimasaki
- Laboratory of Marine Environmental Science, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Edward G Nagato
- Graduate School of Faculty of Life and Environmental Sciences, Shimane University, Matsue, Shimane 690-8504, Japan
| | - Lulu Zhang
- Institute of Nature and Environmental Technology, Kanazawa University, Kakuma-machi, Ishikawa 920-1192, Japan
| | - Ajai K Srivastav
- Department of Zoology, D.D.U. Gorakhpur University, Gorakhpur 273-009, India
| | - Thumronk Amornsakun
- Fisheries Technology Program, Faculty of Science and Technology, Prince of Songkla University, Pattani 94000, Thailand
| | - Yoichiro Kitani
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Noto-cho, Ishikawa 927-0553, Japan
| | - Hajime Matsubara
- Noto Center for Fisheries Science and Technology, Kanazawa University, Osaka, Noto-cho, Ishikawa 927-0552, Japan
| | - Takashi Yazawa
- Department of Biochemistry, Asahikawa Medical University, Hokkaido 078-8510, Japan
| | - Jun Hirayama
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Komatsu, Ishikawa 923-0961, Japan
| | - Atsuhiko Hattori
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba 272-0827, Japan
| | - Yuji Oshima
- Laboratory of Marine Environmental Science, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Kazuichi Hayakawa
- Low Level Radioactivity Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Nomi city, Ishikawa 923-1224, Japan
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18
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Sato Y, Horiuchi H, Fukasawa S, Takesawa S, Hirayama J. Data on the in vitro elution of substances from three types of polysulfone membrane dialyzers as well as a non-polysulfone cellulose triacetate membrane dialyzer evaluated using ultraviolet absorption. Data Brief 2021; 39:107490. [PMID: 34746342 PMCID: PMC8554461 DOI: 10.1016/j.dib.2021.107490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 10/13/2021] [Indexed: 11/16/2022] Open
Abstract
We evaluated the influences of the priming process (washing with saline), saline circulation conditions, and saline incubation on the in vitro elution of substances from three types of polysulfone (PSu) membrane dialyzers sterilized using gamma irradiation [NV-15X (Toray Industries, Inc.)], autoclaving [RENAK-PS1.6 (Kawasumi Laboratories, Inc.)], or in-line steam [FX-140J (Fresenius Medical Care)] methods as well as a non-PSu cellulose triacetate (CTA) membrane dialyzer [FB-150U(NIPRO)]. The effect of priming was evaluated by circulating 1000 mL of saline through the dialyzers at a rate of 100 mL/min and measuring the elution level of the substances by determining their ultraviolet (UV) absorption at 220 nm using spectrophotometry. All the tested dialyzers showed that the elution of the substances decreased as per the order of sample collection. Primed dialyzers were used in the subsequent experiments. Circulating saline through the primed membrane dialyzers at a flow rate of 100 mL/min caused time-dependent elution of substances from all the tested dialyzers; increasing the flow rate to 200 mL/min did not have a significant effect on the time-dependence or elution amount at each time point (0–8 h). The elution was also evaluated after incubating the membrane dialyzers with saline for 24 h. A co-submitted article (Sato et al., 2021) detailed the preparation of the identical experimental circuits, as well as the influences of saline washing, saline circulation conditions, and saline incubation on the elution of the hydrophilic agent polyvinylpyrrolidone (PVP) from each dialyzer using the Müller method, which can enable specific detection of PVP (Müller, 1968). The relative elution levels of PVP among the dialyzers and the experimental conditions were different from those of substances determined using UV (220 nm) absorption. Our data might be used for further development of experiments for identifying non-PVP substances eluted from dialyzers by providing information regarding the conditions of the elutions and types of dialyzers from which they are eluted.
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Affiliation(s)
- Yoshinori Sato
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Ishikawa, Japan
| | - Hayato Horiuchi
- Department of Medical Engineering, National Center for Child Health and Development, Tokyo, Japan
| | - Shinji Fukasawa
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Ishikawa, Japan
| | - Shingo Takesawa
- Department of Medical Engineering, Kyushu University of Health and Welfare, Miyazaki, Japan
| | - Jun Hirayama
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Ishikawa, Japan
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19
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Yamamoto T, Ikegame M, Hirayama J, Kitamura KI, Tabuchi Y, Furusawa Y, Sekiguchi T, Endo M, Mishima H, Seki A, Yano S, Matsubara H, Hattori A, Suzuki N. Expression of sclerostin in the regenerating scales of goldfish and its increase under microgravity during space flight. Biomed Res 2021; 41:279-288. [PMID: 33268672 DOI: 10.2220/biomedres.41.279] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Osteocytes, osteoblasts (bone-forming cells), and osteoclasts (bone-resorbing cells) are the primary types of cells that regulate bone metabolism in mammals. Sclerostin produced in bone cells activates osteoclasts, inhibiting bone formation; excess production of sclerostin, therefore, leads to the loss of bone mass. Fish scales have been reported to have morphological and functional similarities to mammalian bones, making them a useful experimental system for analyzing vertebrate bone metabolism in vitro. However, whether fish scales contain cells producing sclerostin and/or osteocytes has not been determined. The current study demonstrated, for the first time, that sclerostin-containing cells exist in goldfish scales. Analysis of the distribution and shape of sclerostin-expressing cells provided evidence that osteoblasts produce sclerostin in goldfish scales. Furthermore, our results found that osteocyte-like cells exist in goldfish scales, which also produce sclerostin. Finally, we demonstrated that microgravity in outer space increased the level of sclerostin in the scales of goldfish, a finding suggesting that the induction of sclerostin is the mechanism underlying the activation of osteoclasts under microgravity.
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Affiliation(s)
- Tatsuki Yamamoto
- Noto Marine Laboratory, Division of Marine Environmental Studies, Institute of Nature and Environmental Technology, Kanazawa University
| | - Mika Ikegame
- Department of Oral Morphology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
| | - Jun Hirayama
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University
| | - Kei-Ichiro Kitamura
- Department of Clinical Laboratory Science, Division of Health Sciences, Graduate School of Medical Science, Kanazawa University
| | | | - Yukihiro Furusawa
- Department of Liberal Arts and Sciences, Toyama Prefectural University
| | - Toshio Sekiguchi
- Noto Marine Laboratory, Division of Marine Environmental Studies, Institute of Nature and Environmental Technology, Kanazawa University
| | - Masato Endo
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology
| | - Hiroyuki Mishima
- Department of Dental Engineering, Tsurumi University School of Dental Medicine
| | | | | | - Hajime Matsubara
- Noto Center for Fisheries Science and Technology, Kanazawa University
| | - Atsuhiko Hattori
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University
| | - Nobuo Suzuki
- Noto Marine Laboratory, Division of Marine Environmental Studies, Institute of Nature and Environmental Technology, Kanazawa University
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20
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Kitamura K, Hirayama J, Tabuchi Y, Minami T, Matsubara H, Hattori A, Suzuki N. Glyoxal-induced formation of advanced glycation end-products in type 1 collagen decreases both its strength and flexibility in vitro. J Diabetes Investig 2021; 12:1555-1559. [PMID: 33605082 PMCID: PMC8409810 DOI: 10.1111/jdi.13528] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 02/05/2021] [Accepted: 02/16/2021] [Indexed: 11/30/2022] Open
Abstract
The high plasma glucose induced in glucose metabolism disorders leads to the non-enzymatic glucose-dependent modification (glycation) of type 1 collagen, which is an essential component of bone tissue. The glycation of proteins induces the formation of advanced glycation end-products, such as carboxymethyl arginine, which is preferentially generated in glycated collagen. However, the effect of advanced glycation end-product formation on the characteristics of type 1 collagen remains unclear due to the lack of suitable in vitro experimental systems analyzing type 1 collagen. Here, we show that the glycation of type 1 collagen can be analyzed in vitro using a goldfish-scale bone model. Our study using these scales provides evidence that the advanced glycation end-product formation in type 1 collagen induced by glyoxal, the carboxymethyl arginine inducer, facilitates the crosslinking of type 1 collagen, decreasing both its strength and flexibility.
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Affiliation(s)
- Kei‐ichiro Kitamura
- Department of Clinical Laboratory ScienceGraduate School of Medical ScienceKanazawa UniversityKanazawaJapan
| | - Jun Hirayama
- Department of Clinical EngineeringFaculty of Health SciencesKomatsu UniversityKomatsuJapan
| | | | - Takao Minami
- Department of Clinical Laboratory ScienceGraduate School of Medical ScienceKanazawa UniversityKanazawaJapan
| | - Hajime Matsubara
- Noto Center for Fisheries Science and TechnologyKanazawa UniversityKanazawaJapan
| | - Atsuhiko Hattori
- Department of BiologyCollege of Liberal Arts and SciencesTokyo Medical and Dental UniversityIchikawaJapan
| | - Nobuo Suzuki
- Noto Marine LaboratoryInstitute of Nature and Environmental TechnologyKanazawa UniversityKanazawaJapan
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21
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Alifu Y, Kofuji S, Sunaga S, Kusaba M, Hirayama J, Nishina H. The Light-Inducible Genes Per2, Cry1a, and Cry2a Regulate Oxidative Status in Zebrafish. Biol Pharm Bull 2021; 44:1160-1165. [PMID: 34334501 DOI: 10.1248/bpb.b21-00432] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The circadian clock is a highly conserved 24 h biological oscillation mechanism and is affected by environmental stimuli such as light, food and temperature. Disruption of the circadian clock results in disorders of diverse biological processes, including the sleep-wake cycle and metabolism. Although we previously identified several components of the circadian clock in zebrafish, our understanding of the relationship between light-inducible clock genes and metabolism remains incomplete. To investigate how light-inducible clock genes regulate metabolism, we performed transcriptomic and metabolomic analyses of the light-inducible clock genes zPer2, zCry1a, and zCry2a in zebrafish. Transcriptomic analysis of zPer2/zCry1a double knockout (DKO) and zPer2/zCry1a/zCry2a triple knockout (TKO) mutants showed that their gene expression profiles differed from that of wild type (WT) zebrafish. In particular, mRNA levels of zKeap1a, which encodes an oxidative stress sensor, were increased in DKO and TKO mutants. Metabolomic analysis showed genotype-dependent alteration of metabolomic profiles. Principal component analysis (PCA) and partial least squares-discriminant analysis (PLS-DA) showed the alteration of cysteine/methionine metabolism and glutathione metabolism. Specifically, cysteine and glutathione were decreased but methionine sulfoxide was increased in TKO zebrafish. These results indicate that the light-inducible genes zPer2, zCry1a, and zCry2a are involved in regulating the oxidative status of zebrafish.
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Affiliation(s)
- Yikelamu Alifu
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University (TMDU)
| | - Satoshi Kofuji
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University (TMDU)
| | - Sachi Sunaga
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University (TMDU)
| | - Mizuki Kusaba
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University (TMDU)
| | - Jun Hirayama
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University
| | - Hiroshi Nishina
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University (TMDU)
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22
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Tabuchi Y, Hasegawa H, Suzuki N, Furusawa Y, Hirano T, Nagaoka R, Hirayama J, Hoshi N, Mochizuki T. Genetic response to low‑intensity ultrasound on mouse ST2 bone marrow stromal cells. Mol Med Rep 2021; 23:173. [PMID: 33398373 PMCID: PMC7821223 DOI: 10.3892/mmr.2020.11812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Accepted: 10/27/2020] [Indexed: 11/05/2022] Open
Abstract
Although low‑intensity ultrasound (LIUS) is a clinically established procedure, the early cellular effect of LIUS on a genetic level has not yet been studied. The current study investigated the early response genes elicited by LIUS in bone marrow stromal cells (BMSCs) using global‑scale microarrays and computational gene expression analysis tools. Mouse ST2 BMSCs were treated with LIUS [ISATA, 25 mW/cm2 for 20 min with a frequency of 1.11 MHz in a pulsed‑wave mode (0.2‑s burst sine waves repeated at 1 kHz)], then cultured for 0.5, 1 and 3 h at 37˚C. The time course of changes in gene expression was evaluated using GeneChip® high‑density oligonucleotide microarrays and Ingenuity® Pathway Analysis tools. The results were verified by reverse transcription‑quantitative polymerase chain reaction (RT‑qPCR). A single exposure of LIUS did not affect cell morphology, cell growth or alkaline phosphatase activity. However, 61 upregulated and 103 downregulated genes were identified from 0.5 to 3 h after LIUS treatment. Two significant gene networks, labeled E and H, were identified from the upregulated genes, while a third network, labeled T, was identified from the downregulated genes. Gene network E or H containing the immediate‑early genes FBJ osteosarcoma oncogene and early growth response 1 or the heat shock proteins heat shock protein 1a/b was associated mainly with the biological functions of bone physiology and protein folding or apoptosis, respectively. Gene network T containing transcription factors fos‑like antigen 1 and serum response factor was also associated with the biological functions of the gene expression. RT‑qPCR indicated that the expression of several genes in the gene networks E and H were elevated in LIUS‑treated cells. LIUS was demonstrated to induce gene expression after short application in mouse ST2 BMSCs. The results of the present study provide a basis for the elucidation of the detailed molecular mechanisms underlying the cellular effects of LIUS.
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Affiliation(s)
- Yoshiaki Tabuchi
- Division of Molecular Genetics Research, Life Science Research Center, University of Toyama, Toyama 930-0194, Japan
| | - Hideyuki Hasegawa
- Graduate School of Science and Engineering, University of Toyama, Toyama 930‑8555, Japan
| | - Nobuo Suzuki
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ishikawa 927‑0553, Japan
| | - Yukihiro Furusawa
- Department of Liberal Arts and Sciences, Toyama Prefectural University, Toyama 939-0398, Japan
| | - Tetsushi Hirano
- Division of Molecular Genetics Research, Life Science Research Center, University of Toyama, Toyama 930-0194, Japan
| | - Ryo Nagaoka
- Graduate School of Science and Engineering, University of Toyama, Toyama 930‑8555, Japan
| | - Jun Hirayama
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Komatsu 923‑0961, Japan
| | - Nobuhiko Hoshi
- Laboratory of Animal Molecular Morphology, Department of Animal Science, Graduate School of Agricultural Science, Kobe University, Kobe 657‑8501, Japan
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23
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Satter SS, Hirayama J, Kobayashi H, Nakajima K, Fukuoka A. Water-Resistant Pt Sites in Hydrophobic Mesopores Effective for Low-Temperature Ethylene Oxidation. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02816] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shazia S. Satter
- Institute for Catalysis, Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Jun Hirayama
- Institute for Catalysis, Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Hirokazu Kobayashi
- Institute for Catalysis, Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Kiyotaka Nakajima
- Institute for Catalysis, Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Atsushi Fukuoka
- Institute for Catalysis, Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
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24
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Igarashi-Migitaka J, Seki A, Ikegame M, Honda M, Sekiguchi T, Mishima H, Shimizu N, Matsubara H, Srivastav AK, Hirayama J, Maruyama Y, Kamijo-Ikemori A, Hirata K, Hattori A, Suzuki N. Oral administration of melatonin contained in drinking water increased bone strength in naturally aged mice. Acta Histochem 2020; 122:151596. [PMID: 32778234 DOI: 10.1016/j.acthis.2020.151596] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 07/01/2020] [Accepted: 07/09/2020] [Indexed: 12/20/2022]
Abstract
Melatonin has recently been found to be a possible new regulator of bone metabolism. However, the influence of melatonin in natural age-related osteoporosis has not been fully elucidated yet, although there have been some reports regarding postmenopausal osteoporosis with melatonin treatments. The present study investigated the effects of long-term melatonin administration during the aging process on bone metabolism. Using quantitative computed tomography methods, we found that the total bone density of both the femur metaphysis and diaphysis decreased significantly in 20-month-old male mice. In the metaphysis, both trabecular bone mass and Polar-Strength Strain Index (SSI), which is an index of bone strength, decreased significantly. Judging from bone histomorphometry analysis, trabecular bone in 20-month-old male mice decreases significantly with age and is small and sparse, as compared to that of 4-month-old male mice. Loss of trabecular bone is one possible cause of loss of bone strength in the femoral bone. In the metaphysis, the melatonin administration group had significantly higher trabecular bone density than the non-administration group. The Polar-SSI, cortical area, and periosteal circumference in the diaphysis was also significantly higher with melatonin treatments. Since the melatonin receptor, MT2, was detected in both osteoblasts and osteoclasts of the femoral bone of male mice, we expect that melatonin acts on osteoblasts and osteoclasts to maintain the bone strength of the diaphysis and metaphysis. Thus, melatonin is a potential drug for natural age-related osteoporosis.
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Furusawa Y, Yamamoto T, Hattori A, Suzuki N, Hirayama J, Sekiguchi T, Tabuchi Y. De novo transcriptome analysis and gene expression profiling of fish scales isolated from Carassius auratus during space flight: Impact of melatonin on gene expression in response to space radiation. Mol Med Rep 2020; 22:2627-2636. [PMID: 32945420 PMCID: PMC7466330 DOI: 10.3892/mmr.2020.11363] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 12/15/2019] [Accepted: 05/27/2020] [Indexed: 12/13/2022] Open
Abstract
Astronauts are inevitably exposed to two major risks during space flight, microgravity and radiation. Exposure to microgravity has been discovered to lead to rapid and vigorous bone loss due to elevated osteoclastic activity. In addition, long-term exposure to low-dose-rate space radiation was identified to promote DNA damage accumulation that triggered chronic inflammation, resulting in an increased risk for bone marrow suppression and carcinogenesis. In our previous study, melatonin, a hormone known to regulate the sleep-wake cycle, upregulated calcitonin expression levels and downregulated receptor activator of nuclear factor-κB ligand expression levels, leading to improved osteoclastic activity in a fish scale model. These results indicated that melatonin may represent a potential drug or lead compound for the prevention of bone loss under microgravity conditions. However, it is unclear whether melatonin affects the biological response induced by space radiation. The aim of the present study was to evaluate the effect of melatonin on the expression levels of genes responsive to space radiation. In the present study, to support the previous data regarding de novo transcriptome analysis of goldfish scales, a detailed and improved experimental method (e.g., PCR duplicate removal followed by de novo assembly, global normalization and calculation of statistical significance) was applied for the analysis. In addition, the transcriptome data were analyzed via global normalization, functional categorization and gene network construction to determine the impact of melatonin on gene expression levels in irradiated fish scales cultured in space. The results of the present study demonstrated that melatonin treatment counteracted microgravity- and radiation-induced alterations in the expression levels of genes associated with DNA replication, DNA repair, proliferation, cell death and survival. Thus, it was concluded that melatonin may promote cell survival and ensure normal cell proliferation in cells exposed to space radiation.
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Affiliation(s)
- Yukihiro Furusawa
- Department of Liberal Arts and Sciences, Toyama Prefectural University, Toyama 939‑0398, Japan
| | - Tatsuki Yamamoto
- Noto Marine Laboratory, Division of Marine Environmental Studies, Institute of Nature and Environmental Technology, Kanazawa University, Ishikawa 927‑0553, Japan
| | - Atsuhiko Hattori
- College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Chiba 272‑0827, Japan
| | - Nobuo Suzuki
- Noto Marine Laboratory, Division of Marine Environmental Studies, Institute of Nature and Environmental Technology, Kanazawa University, Ishikawa 927‑0553, Japan
| | - Jun Hirayama
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Ishikawa 923‑0961, Japan
| | - Toshio Sekiguchi
- Noto Marine Laboratory, Division of Marine Environmental Studies, Institute of Nature and Environmental Technology, Kanazawa University, Ishikawa 927‑0553, Japan
| | - Yoshiaki Tabuchi
- Division of Molecular Genetics Research, Life Science Research Center, University of Toyama, Toyama 930‑0194, Japan
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Hirayama J. Cryopreservation of Adherent Human Pluripotent Stem Cells via a Novel Dish Culture Preservation Method. Cryo Letters 2020; 41:230-236. [PMID: 33988652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
BACKGROUND Human induced pluripotent stem cells (hiPSCs) are valuable resources for cell therapy and drug discovery. Cryopreservation is a key technique used to realize these applications, which require a large number of cells. However, standard protocols for the preservation of the adherent cells involve multiple complicated steps, which can lead to technical difficulties. OBJECTIVE To develop a more efficient method for cryopreservation of adherent cells using culture dishes. MATERIALS AND METHODS Ice-seeding treatment was employed to avoid intercellular freezing, and rapid warming used to improve cell viability. RESULTS The immediate survival rate after thawing was 48%. The recovery period of cells cryopreserved by the dish culture method was shortened upon subsequent passage culture, and the time for re-cultured cells to reach the appropriate confluency was reduced by two days. CONCLUSION The hiPSCs can be successfully cryopreserved in culture dishes with improved viability and faster recovery. The optimization of the ice-seeding temperature and cooling rate increased the survival rate.
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Affiliation(s)
- J Hirayama
- Mayekawa MFG Co., Ltd., 2000 Tatsuzawa, Moriya, Ibaraki 302-0118, Japan.
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Hirayama J, Kobayashi H, Fukuoka A. Amorphization and Semi-Dry Conversion of Crystalline Cellulose to Oligosaccharides by Impregnated Phosphoric Acid. BCSJ 2020. [DOI: 10.1246/bcsj.20190287] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jun Hirayama
- Institute for Catalysis, Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Hirokazu Kobayashi
- Institute for Catalysis, Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Atsushi Fukuoka
- Institute for Catalysis, Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
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Nagao M, Misu S, Hirayama J, Otomo R, Kamiya Y. Magneli-Phase Titanium Suboxide Nanocrystals as Highly Active Catalysts for Selective Acetalization of Furfural. ACS Appl Mater Interfaces 2020; 12:2539-2547. [PMID: 31868342 DOI: 10.1021/acsami.9b19520] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Alongside TiO2, Magneli-phase titanium suboxide having the composition of TinO2n-1 is a kind of attractive functional materials composed of titanium. However, there still remain problems to be overcome in the synthesis of titanium suboxide; the existing synthesis methods require high temperature typically over 1000 °C and/or postsynthesis purification. This study presents a novel approach to synthesis of titanium suboxide nanoparticles through solid-phase reaction of TiO2 with TiH2. Crystal phases of titanium suboxide were easily controlled by changing TiO2/TiH2 molar ratios in a TiO2-TiH2 mixed precursor, and a series of titanium suboxide nanoparticles including Ti2O3, Ti3O5, Ti4O7, and Ti8O15 were successfully obtained. The reaction of TiO2 with TiH2 proceeded at a relatively low temperature due to the high reactivity of TiH2, giving titanium suboxide nanoparticles without any postsynthesis purification. Ti2O3 nanoparticles and TiO2 were applied as solid acid catalysts for reaction of furfural with 2-propanol. Ti2O3 showed a high catalytic activity and high selectivity for acetalization of furfural, while TiO2 showed only poor activity for transfer hydrogenation of furfural. The difference in catalytic properties is discussed in terms of the acid properties of Ti2O3 and TiO2.
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Okamoto-Uchida Y, Izawa J, Nishimura A, Hattori A, Suzuki N, Hirayama J. Post-translational Modifications are Required for Circadian Clock Regulation in Vertebrates. Curr Genomics 2019; 20:332-339. [PMID: 32476990 PMCID: PMC7235395 DOI: 10.2174/1389202919666191014094349] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 07/30/2019] [Revised: 09/05/2019] [Accepted: 09/06/2019] [Indexed: 01/01/2023] Open
Abstract
Circadian clocks are intrinsic, time-tracking systems that bestow upon organisms a survival advantage. Under natural conditions, organisms are trained to follow a 24-h cycle under environmental time cues such as light to maximize their physiological efficiency. The exact timing of this rhythm is established via cell-autonomous oscillators called cellular clocks, which are controlled by transcription/translation-based negative feedback loops. Studies using cell-based systems and genetic techniques have identified the molecular mechanisms that establish and maintain cellular clocks. One such mechanism, known as post-translational modification, regulates several aspects of these cellular clock components, including their stability, subcellular localization, transcriptional activity, and interaction with other proteins and signaling pathways. In addition, these mechanisms contribute to the integration of external signals into the cellular clock machinery. Here, we describe the post-translational modifications of cellular clock regulators that regulate circadian clocks in vertebrates.
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Affiliation(s)
- Yoshimi Okamoto-Uchida
- Division of Medicinal Safety Science, National Institute of Health Sciences, Tokyo, Japan
| | - Junko Izawa
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, 10-10 Doihara-machi, Komatsu, Ishikawa, 923-0921, Japan
| | - Akari Nishimura
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, 10-10 Doihara-machi, Komatsu, Ishikawa, 923-0921, Japan
| | - Atsuhiko Hattori
- College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba, Japan
| | - Nobuo Suzuki
- Noto Marine Laboratory, Division of Marine Environmental Studies, Institute of Nature and Environmental Technology, Kanazawa University, Noto-cho, Ishikawa 927-0553, Japan
| | - Jun Hirayama
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, 10-10 Doihara-machi, Komatsu, Ishikawa, 923-0921, Japan
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30
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Ikegame M, Hattori A, Tabata MJ, Kitamura K, Tabuchi Y, Furusawa Y, Maruyama Y, Yamamoto T, Sekiguchi T, Matsuoka R, Hanmoto T, Ikari T, Endo M, Omori K, Nakano M, Yashima S, Ejiri S, Taya T, Nakashima H, Shimizu N, Nakamura M, Kondo T, Hayakawa K, Takasaki I, Kaminishi A, Akatsuka R, Sasayama Y, Nishiuchi T, Nara M, Iseki H, Chowdhury VS, Wada S, Ijiri K, Takeuchi T, Suzuki T, Ando H, Matsuda K, Somei M, Mishima H, Mikuni‐Takagaki Y, Funahashi H, Takahashi A, Watanabe Y, Maeda M, Uchida H, Hayashi A, Kambegawa A, Seki A, Yano S, Shimazu T, Suzuki H, Hirayama J, Suzuki N. Melatonin is a potential drug for the prevention of bone loss during space flight. J Pineal Res 2019; 67:e12594. [PMID: 31286565 PMCID: PMC6771646 DOI: 10.1111/jpi.12594] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 06/19/2019] [Accepted: 06/19/2019] [Indexed: 12/30/2022]
Abstract
Astronauts experience osteoporosis-like loss of bone mass because of microgravity conditions during space flight. To prevent bone loss, they need a riskless and antiresorptive drug. Melatonin is reported to suppress osteoclast function. However, no studies have examined the effects of melatonin on bone metabolism under microgravity conditions. We used goldfish scales as a bone model of coexisting osteoclasts and osteoblasts and demonstrated that mRNA expression level of acetylserotonin O-methyltransferase, an enzyme essential for melatonin synthesis, decreased significantly under microgravity. During space flight, microgravity stimulated osteoclastic activity and significantly increased gene expression for osteoclast differentiation and activation. Melatonin treatment significantly stimulated Calcitonin (an osteoclast-inhibiting hormone) mRNA expression and decreased the mRNA expression of receptor activator of nuclear factor κB ligand (a promoter of osteoclastogenesis), which coincided with suppressed gene expression levels for osteoclast functions. This is the first study to report the inhibitory effect of melatonin on osteoclastic activation by microgravity. We also observed a novel action pathway of melatonin on osteoclasts via an increase in CALCITONIN secretion. Melatonin could be the source of a potential novel drug to prevent bone loss during space flight.
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Affiliation(s)
- Mika Ikegame
- Graduate School of Medicine, Dentistry and Pharmaceutical SciencesOkayama UniversityOkayamaJapan
| | - Atsuhiko Hattori
- College of Liberal Arts and SciencesTokyo Medical and Dental UniversityIchikawaJapan
| | - Makoto J. Tabata
- Graduate School of Tokyo Medical and Dental UniversityBunkyo‐kuJapan
| | - Kei‐ichiro Kitamura
- Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health SciencesKanazawa UniversityKodatsunoJapan
| | | | - Yukihiro Furusawa
- Department of Liberal Arts and SciencesToyama Prefectural UniversityToyamaJapan
| | - Yusuke Maruyama
- College of Liberal Arts and SciencesTokyo Medical and Dental UniversityIchikawaJapan
| | - Tatsuki Yamamoto
- Division of Marine Environmental Studies, Noto Marine Laboratory, Institute of Nature and Environmental TechnologyKanazawa UniversityNoto‐choJapan
| | - Toshio Sekiguchi
- Division of Marine Environmental Studies, Noto Marine Laboratory, Institute of Nature and Environmental TechnologyKanazawa UniversityNoto‐choJapan
| | - Risa Matsuoka
- College of Liberal Arts and SciencesTokyo Medical and Dental UniversityIchikawaJapan
| | - Taizo Hanmoto
- Division of Marine Environmental Studies, Noto Marine Laboratory, Institute of Nature and Environmental TechnologyKanazawa UniversityNoto‐choJapan
| | - Takahiro Ikari
- Division of Marine Environmental Studies, Noto Marine Laboratory, Institute of Nature and Environmental TechnologyKanazawa UniversityNoto‐choJapan
| | - Masato Endo
- Department of Marine BiosciencesTokyo University of Marine Science and TechnologyMinato‐kuJapan
| | | | - Masaki Nakano
- College of Liberal Arts and SciencesTokyo Medical and Dental UniversityIchikawaJapan
| | - Sayaka Yashima
- College of Liberal Arts and SciencesTokyo Medical and Dental UniversityIchikawaJapan
| | - Sadakazu Ejiri
- Division of Oral Structure, Function and DevelopmentAsahi University School of DentistryMizuhoJapan
| | | | - Hiroshi Nakashima
- Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health SciencesKanazawa UniversityKodatsunoJapan
| | - Nobuaki Shimizu
- Division of Marine Environmental Studies, Noto Marine Laboratory, Institute of Nature and Environmental TechnologyKanazawa UniversityNoto‐choJapan
| | - Masahisa Nakamura
- Faculty of Education and Integrated Arts and SciencesWaseda UniversityShinjuku‐kuJapan
| | - Takashi Kondo
- Graduate School of Medicine and Pharmaceutical SciencesUniversity of ToyamaToyamaJapan
| | - Kazuichi Hayakawa
- Low Level Radioactivity Laboratory, Institute of Nature and Environmental TechnologyKanazawa UniversityNomiJapan
| | - Ichiro Takasaki
- Graduate School of Science and EngineeringUniversity of ToyamaToyamaJapan
| | - Atsushi Kaminishi
- Division of Marine Environmental Studies, Noto Marine Laboratory, Institute of Nature and Environmental TechnologyKanazawa UniversityNoto‐choJapan
| | - Ryosuke Akatsuka
- College of Liberal Arts and SciencesTokyo Medical and Dental UniversityIchikawaJapan
| | - Yuichi Sasayama
- Division of Marine Environmental Studies, Noto Marine Laboratory, Institute of Nature and Environmental TechnologyKanazawa UniversityNoto‐choJapan
| | - Takumi Nishiuchi
- Institute for Gene Research, Advanced Science Research CenterKanazawa UniversityKanazawaJapan
| | - Masayuki Nara
- College of Liberal Arts and SciencesTokyo Medical and Dental UniversityIchikawaJapan
| | - Hachiro Iseki
- Graduate School of Tokyo Medical and Dental UniversityBunkyo‐kuJapan
| | | | | | - Kenichi Ijiri
- Radioisotope CenterUniversity of TokyoBunkyo‐kuJapan
| | - Toshio Takeuchi
- Department of Marine BiosciencesTokyo University of Marine Science and TechnologyMinato‐kuJapan
| | - Tohru Suzuki
- Graduate School of Agricultural ScienceTohoku UniversitySendaiJapan
| | - Hironori Ando
- Marine Biological Station, Sado Center for Ecological SustainabilityNiigata UniversitySadoJapan
| | - Kouhei Matsuda
- Laboratory of Regulatory Biology, Graduate School of Science and EngineeringUniversity of ToyamaToyamaJapan
| | - Masanori Somei
- Division of Marine Environmental Studies, Noto Marine Laboratory, Institute of Nature and Environmental TechnologyKanazawa UniversityNoto‐choJapan
| | - Hiroyuki Mishima
- Department of Dental EngineeringTsurumi University School of Dental MedicineYokohamaJapan
| | | | - Hisayuki Funahashi
- Department of Physical Therapy, Faculty of Makuhari Human CareTohto UniversityMihama‐kuJapan
| | | | - Yoshinari Watanabe
- Organization of Frontier Science and InnovationKanazawa UniversityKanazawaJapan
| | | | | | | | | | | | | | | | | | - Jun Hirayama
- Department of Clinical Engineering, Faculty of Health SciencesKomatsu UniversityKomatsuJapan
| | - Nobuo Suzuki
- Division of Marine Environmental Studies, Noto Marine Laboratory, Institute of Nature and Environmental TechnologyKanazawa UniversityNoto‐choJapan
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Okamoto-Uchida Y, Nishimura A, Izawa J, Hattori A, Suzuki N, Hirayama J. The Use of Chemical Compounds to Identify the Regulatory Mechanisms of Vertebrate Circadian Clocks. Curr Drug Targets 2019; 21:425-432. [PMID: 31556855 DOI: 10.2174/1389450120666190926143120] [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: 07/16/2019] [Revised: 09/04/2019] [Accepted: 09/11/2019] [Indexed: 11/22/2022]
Abstract
Circadian clocks are intrinsic, time-tracking processes that confer a survival advantage on an organism. Under natural conditions, they follow approximately a 24-h day, modulated by environmental time cues, such as light, to maximize an organism's physiological efficiency. The exact timing of this rhythm is established by cell-autonomous oscillators called cellular clocks, which are controlled by transcription-translation negative feedback loops. Studies of cell-based systems and wholeanimal models have utilized a pharmacological approach in which chemical compounds are used to identify molecular mechanisms capable of establishing and maintaining cellular clocks, such as posttranslational modifications of cellular clock regulators, chromatin remodeling of cellular clock target genes' promoters, and stability control of cellular clock components. In addition, studies with chemical compounds have contributed to the characterization of light-signaling pathways and their impact on the cellular clock. Here, the use of chemical compounds to study the molecular, cellular, and behavioral aspects of the vertebrate circadian clock system is described.
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Affiliation(s)
- Yoshimi Okamoto-Uchida
- Division of Medicinal Safety Science, National Institute of Health Sciences, Tokyo, Japan
| | - Akari Nishimura
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Komatsu, Ishikawa, Japan
| | - Junko Izawa
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Komatsu, Ishikawa, Japan
| | - Atsuhiko Hattori
- College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba, Japan
| | - Nobuo Suzuki
- Noto Marine Laboratory, Division of Marine Environmental Studies, Institute of Nature and Environmental Technology, Kanazawa University, Noto-cho, Ishikawa 927-0553, Japan
| | - Jun Hirayama
- Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Komatsu, Ishikawa, Japan
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32
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Hayashi K, Hirayama J, Goldsmith CE, Coulter WA, Millar BC, Dooley JSG, Loughrey A, Rooney PJ, Matsuda M, Moore JE. Exposure to clinical X-ray radiation does not alter antibiotic susceptibility or genotype profile in Gram-negative and Gram-positive clinical pathogens. Br J Biomed Sci 2019. [DOI: 10.1080/09674845.2012.12069137] [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: 10/26/2022]
Affiliation(s)
- K. Hayashi
- Northern Ireland Public Health Laboratory, Department of Bacteriology, Belfast City Hospital, Belfast, Northern Ireland
- Laboratory for Molecular Biology, School of Environmental Health Sciences, Azabu University, 1-17-71 Fuchinobe, Sagamihara, Japan
| | - J. Hirayama
- Northern Ireland Public Health Laboratory, Department of Bacteriology, Belfast City Hospital, Belfast, Northern Ireland
- Laboratory for Molecular Biology, School of Environmental Health Sciences, Azabu University, 1-17-71 Fuchinobe, Sagamihara, Japan
| | - C. E. Goldsmith
- Northern Ireland Public Health Laboratory, Department of Bacteriology, Belfast City Hospital, Belfast, Northern Ireland
| | - W. A. Coulter
- School of Dentistry, The Queen's University of Belfast, Royal Group of Hospitals, Belfast
| | - B. C. Millar
- Northern Ireland Public Health Laboratory, Department of Bacteriology, Belfast City Hospital, Belfast, Northern Ireland
| | - J. S. G. Dooley
- School of Biomedical Sciences, University of Ulster, Coleraine, Northern Ireland, UK
| | - A. Loughrey
- Northern Ireland Public Health Laboratory, Department of Bacteriology, Belfast City Hospital, Belfast, Northern Ireland
| | - P. J. Rooney
- Northern Ireland Public Health Laboratory, Department of Bacteriology, Belfast City Hospital, Belfast, Northern Ireland
| | - M. Matsuda
- Laboratory for Molecular Biology, School of Environmental Health Sciences, Azabu University, 1-17-71 Fuchinobe, Sagamihara, Japan
| | - J. E. Moore
- Northern Ireland Public Health Laboratory, Department of Bacteriology, Belfast City Hospital, Belfast, Northern Ireland
- School of Biomedical Sciences, University of Ulster, Coleraine, Northern Ireland, UK
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Hirayama J, Alifu Y, Hamabe R, Yamaguchi S, Tomita J, Maruyama Y, Asaoka Y, Nakahama KI, Tamaru T, Takamatsu K, Takamatsu N, Hattori A, Nishina S, Azuma N, Kawahara A, Kume K, Nishina H. The clock components Period2, Cryptochrome1a, and Cryptochrome2a function in establishing light-dependent behavioral rhythms and/or total activity levels in zebrafish. Sci Rep 2019; 9:196. [PMID: 30655599 PMCID: PMC6336812 DOI: 10.1038/s41598-018-37879-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 12/03/2018] [Indexed: 11/09/2022] Open
Abstract
The circadian clock generates behavioral rhythms to maximize an organism’s physiological efficiency. Light induces the formation of these rhythms by synchronizing cellular clocks. In zebrafish, the circadian clock components Period2 (zPER2) and Cryptochrome1a (zCRY1a) are light-inducible, however their physiological functions are unclear. Here, we investigated the roles of zPER2 and zCRY1a in regulating locomotor activity and behavioral rhythms. zPer2/zCry1a double knockout (DKO) zebrafish displayed defects in total locomotor activity and in forming behavioral rhythms when briefly exposed to light for 3-h. Exposing DKO zebrafish to 12-h light improved behavioral rhythm formation, but not total activity. Our data suggest that the light-inducible circadian clock regulator zCRY2a supports rhythmicity in DKO animals exposed to 12-h light. Single cell imaging analysis revealed that zPER2, zCRY1a, and zCRY2a function in synchronizing cellular clocks. Furthermore, microarray analysis of DKO zebrafish showed aberrant expression of genes involved regulating cellular metabolism, including ATP production. Overall, our results suggest that zPER2, zCRY1a and zCRY2a help to synchronize cellular clocks in a light-dependent manner, thus contributing to behavioral rhythm formation in zebrafish. Further, zPER2 and zCRY1a regulate total physical activity, likely via regulating cellular energy metabolism. Therefore, these circadian clock components regulate the rhythmicity and amount of locomotor behavior.
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Affiliation(s)
- Jun Hirayama
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University (TMDU), Tokyo, Japan. .,Department of Clinical Engineering, Faculty of Health Sciences, Komatsu University, Ishikawa, Japan.
| | - Yikelamu Alifu
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Rin Hamabe
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Sho Yamaguchi
- Department of Neuropharmacology, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan
| | - Jun Tomita
- Department of Neuropharmacology, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan
| | - Yusuke Maruyama
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University (TMDU), Ichikawa, Japan
| | - Yoichi Asaoka
- Department of Microbiology and Immunology, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Ken-Ichi Nakahama
- Department of Cellular Physiological Chemistry, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Teruya Tamaru
- Department of Physiology and Advanced Research Center for Medical Science, Toho University School of Medicine, Tokyo, Japan
| | - Ken Takamatsu
- Department of Physiology and Advanced Research Center for Medical Science, Toho University School of Medicine, Tokyo, Japan
| | - Nobuhiko Takamatsu
- Department of Biosciences, School of Science, Kitasato University, Sagamihara, Japan
| | - Atsuhiko Hattori
- Department of Biology, College of Liberal Arts and Sciences, Tokyo Medical and Dental University (TMDU), Ichikawa, Japan
| | - Sachiko Nishina
- Department of Ophthalmology and Laboratory for Visual Science, National Center for Child Health and Development, Tokyo, Japan
| | - Noriyuki Azuma
- Department of Ophthalmology and Laboratory for Visual Science, National Center for Child Health and Development, Tokyo, Japan
| | - Atsuo Kawahara
- Laboratory for Developmental Biology, Center for Medical Education and Sciences, Graduate School of Medical Science, University of Yamanashi, Yamanashi, Japan
| | - Kazuhiko Kume
- Department of Neuropharmacology, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan.
| | - Hiroshi Nishina
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.
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Hirayama J, Yasuda KI, Misu S, Otomo R, Kamiya Y. Drastic change in selectivity caused by addition of oxygen to the hydrogen stream for the hydrogenation of nitrite in water over a supported platinum catalyst. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00999j] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Product drastically changed from NH3 to N2 when O2 was added to the H2 stream for the hydrogenation of NO2− with H2 in water over Pt/Al2O3.
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Affiliation(s)
- Jun Hirayama
- Faculty of Environmental Earth Science
- Hokkaido University
- Sapporo 060-0810
- Japan
| | - Kei-ichiro Yasuda
- Graduate School of Environmental Science
- Hokkaido University
- Sapporo 060-0810
- Japan
| | - Sayaka Misu
- Graduate School of Environmental Science
- Hokkaido University
- Sapporo 060-0810
- Japan
| | - Ryoichi Otomo
- Faculty of Environmental Earth Science
- Hokkaido University
- Sapporo 060-0810
- Japan
| | - Yuichi Kamiya
- Faculty of Environmental Earth Science
- Hokkaido University
- Sapporo 060-0810
- Japan
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35
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Abstract
We report the host–guest chemistry between cyclodextrin and a bisdimethylglyoximato cobalt complex, cobaloxime.
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Affiliation(s)
- Masaru Kato
- Section of Environmental Materials Science
- Faculty of Environmental Earth Science
- Hokkaido University
- Sapporo 060-0810
- Japan
| | - Keita Kon
- Division of Environmental Materials Science
- Graduate School of Environmental Science
- Hokkaido University
- Sapporo 060-0810
- Japan
| | - Jun Hirayama
- Division of Environmental Materials Science
- Graduate School of Environmental Science
- Hokkaido University
- Sapporo 060-0810
- Japan
| | - Ichizo Yagi
- Section of Environmental Materials Science
- Faculty of Environmental Earth Science
- Hokkaido University
- Sapporo 060-0810
- Japan
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36
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Affiliation(s)
- R. D. Armstrong
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Park Place, Cardiff, United Kingdom CF10 3AT
| | - J. Hirayama
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Park Place, Cardiff, United Kingdom CF10 3AT
- Institute for Catalysis, Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo 001-0021, Japan
| | - D. W. Knight
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Park Place, Cardiff, United Kingdom CF10 3AT
| | - G. J. Hutchings
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Park Place, Cardiff, United Kingdom CF10 3AT
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37
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Satter SS, Hirayama J, Nakajima K, Fukuoka A. Low Temperature Oxidation of Trace Ethylene over Pt Nanoparticles Supported on Hydrophobic Mesoporous Silica. CHEM LETT 2018. [DOI: 10.1246/cl.180364] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shazia S. Satter
- Institute for Catalysis, Hokkaido University, Sapporo, Hokkaido 001-0021, Japan
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Jun Hirayama
- Institute for Catalysis, Hokkaido University, Sapporo, Hokkaido 001-0021, Japan
| | - Kiyotaka Nakajima
- Institute for Catalysis, Hokkaido University, Sapporo, Hokkaido 001-0021, Japan
| | - Atsushi Fukuoka
- Institute for Catalysis, Hokkaido University, Sapporo, Hokkaido 001-0021, Japan
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38
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Moore JE, Hirayama J, Hayashi K, Mason C, Coulter W, Matsuda M, Goldsmith CE. Examination of 16S-23S rRNA intergenic spacer region (ISR) heterogeneity in a population of clinical Streptococcus pneumoniae- a new laboratory epidemiological genotyping tool to aid outbreak analysis. Br J Biomed Sci 2018; 75:95-97. [DOI: 10.1080/09674845.2017.1382025] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- JE Moore
- Northern Ireland Public Health Laboratory, Department of Bacteriology, Belfast City Hospital, Belfast, Northern Ireland, UK
- School of Medicine, Dentistry and Biomedical Sciences, Queen’s University of Belfast, Royal Group of Hospitals, Belfast, Northern Ireland, UK
- School of Biomedical Sciences, University of Ulster, Coleraine, Northern Ireland, UK
| | - J Hirayama
- Northern Ireland Public Health Laboratory, Department of Bacteriology, Belfast City Hospital, Belfast, Northern Ireland, UK
- Laboratory for Molecular Biology, School of Environmental Health Sciences, Azabu University, Sagamihara, Japan
| | - K Hayashi
- Northern Ireland Public Health Laboratory, Department of Bacteriology, Belfast City Hospital, Belfast, Northern Ireland, UK
- Laboratory for Molecular Biology, School of Environmental Health Sciences, Azabu University, Sagamihara, Japan
| | - C Mason
- School of Medicine, Dentistry and Biomedical Sciences, Queen’s University of Belfast, Royal Group of Hospitals, Belfast, Northern Ireland, UK
| | - W Coulter
- School of Medicine, Dentistry and Biomedical Sciences, Queen’s University of Belfast, Royal Group of Hospitals, Belfast, Northern Ireland, UK
| | - M Matsuda
- Laboratory for Molecular Biology, School of Environmental Health Sciences, Azabu University, Sagamihara, Japan
| | - CE Goldsmith
- Northern Ireland Public Health Laboratory, Department of Bacteriology, Belfast City Hospital, Belfast, Northern Ireland, UK
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39
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Hirayama J, Kamiya Y. Tin-palladium supported on alumina as a highly active and selective catalyst for hydrogenation of nitrate in actual groundwater polluted with nitrate. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00730f] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We developed SnPd/Al2O3 showing high catalytic performance for the hydrogenation of NO3− in actual groundwater polluted with NO3−.
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Affiliation(s)
- Jun Hirayama
- Research Fellow of Japan Society for the Promotion of Science (JSPS)
- Tokyo 102-0083
- Japan
- Faculty of Environmental Earth Science
- Hokkaido University
| | - Yuichi Kamiya
- Faculty of Environmental Earth Science
- Hokkaido University
- Sapporo 060-0810
- Japan
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40
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Maruyama J, Inami K, Michishita F, Jiang X, Iwasa H, Nakagawa K, Ishigami-Yuasa M, Kagechika H, Miyamura N, Hirayama J, Nishina H, Nogawa D, Yamamoto K, Hata Y. Novel YAP1 Activator, Identified by Transcription-Based Functional Screen, Limits Multiple Myeloma Growth. Mol Cancer Res 2017; 16:197-211. [DOI: 10.1158/1541-7786.mcr-17-0382] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 09/20/2017] [Accepted: 10/10/2017] [Indexed: 11/16/2022]
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41
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Yamasaki T, Deki-Arima N, Kaneko A, Miyamura N, Iwatsuki M, Matsuoka M, Fujimori-Tonou N, Okamoto-Uchida Y, Hirayama J, Marth JD, Yamanashi Y, Kawasaki H, Yamanaka K, Penninger JM, Shibata S, Nishina H. Age-dependent motor dysfunction due to neuron-specific disruption of stress-activated protein kinase MKK7. Sci Rep 2017; 7:7348. [PMID: 28779160 PMCID: PMC5544763 DOI: 10.1038/s41598-017-07845-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 07/03/2017] [Indexed: 11/23/2022] Open
Abstract
c-Jun N-terminal kinase (JNK) is a member of the mitogen-activated protein kinase family and controls various physiological processes including apoptosis. A specific upstream activator of JNKs is the mitogen-activated protein kinase kinase 7 (MKK7). It has been reported that MKK7-JNK signaling plays an important regulatory role in neural development, however, post-developmental functions in the nervous system have not been elucidated. In this study, we generated neuron-specific Mkk7 knockout mice (MKK7 cKO), which impaired constitutive activation of JNK in the nervous system. MKK7 cKO mice displayed impaired circadian behavioral rhythms and decreased locomotor activity. MKK7 cKO mice at 8 months showed motor dysfunctions such as weakness of hind-limb and gait abnormality in an age-dependent manner. Axonal degeneration in the spinal cord and muscle atrophy were also observed, along with accumulation of the axonal transport proteins JNK-interacting protein 1 and amyloid beta precursor protein in the brains and spinal cords of MKK7 cKO mice. Thus, the MKK7-JNK signaling pathway plays important roles in regulating circadian rhythms and neuronal maintenance in the adult nervous system.
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Affiliation(s)
- Tokiwa Yamasaki
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Norie Deki-Arima
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Asahito Kaneko
- Laboratory of Physiology and Pharmacology, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Norio Miyamura
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Mamiko Iwatsuki
- Department of Hygiene and Public Health I, Tokyo Women's Medical University, Tokyo, Japan
| | - Masato Matsuoka
- Department of Hygiene and Public Health I, Tokyo Women's Medical University, Tokyo, Japan
| | - Noriko Fujimori-Tonou
- Laboratory for Molecular Dynamics of Mental Disorders, RIKEN Brain Science Institute, Wako, Saitama, 3510198, Japan
| | - Yoshimi Okamoto-Uchida
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Jun Hirayama
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Jamey D Marth
- Center for Nanomedicine, SBP Medical Discovery Institute, Department of Molecular, Cellular, and Developmental Biology, University of California Santa Barbara, Santa Barbara, California, USA
| | - Yuji Yamanashi
- Division of Genetics, Department of Cancer Biology, The Institute of Medical Science, The University of Tokyo, Shirokanedai, Minato-ku, Tokyo, 108-8639, Japan
| | - Hiroshi Kawasaki
- Department of Medical Neuroscience, Graduate School of Medical Sciences; Brain/Liver Interface Medicine Research Center, Kanazawa University, Kanazawa, Japan
| | - Koji Yamanaka
- Department of Neuroscience and Pathobiology, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
| | - Josef M Penninger
- IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna, Austria
| | - Shigenobu Shibata
- Laboratory of Physiology and Pharmacology, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Hiroshi Nishina
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan.
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42
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Negishi J, Omori Y, Shindo M, Takanashi H, Musha S, Nagayama S, Hirayama J, Nishina H, Nakakura T, Mogi C, Sato K, Okajima F, Mochimaru Y, Tomura H. Manganese and cobalt activate zebrafish ovarian cancer G-protein-coupled receptor 1 but not GPR4. J Recept Signal Transduct Res 2017; 37:401-408. [PMID: 28270026 DOI: 10.1080/10799893.2017.1298130] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Mammalian ovarian G-protein-coupled receptor 1 (OGR1) is activated by some metals in addition to extracellular protons and coupling to multiple intracellular signaling pathways. In the present study, we examined whether zebrafish OGR1, zebrafish GPR4, and human GPR4 (zOGR1, zGPR4, and hGPR4, respectively) could sense the metals and activate the intracellular signaling pathways. On one hand, we found that only manganese and cobalt of the tested metals stimulated SRE-promoter activities in zOGR1-overexpressed HEK293T cells. On the other hand, none of the metals tested stimulated the promoter activities in zGPR4- and hGPR4-overexpressed cells. The OGR1 mutant (H4F), which is lost to activation by extracellular protons, did not stimulate metal-induced SRE-promoter activities. These results suggest that zOGR1, but not GPR4, is also a metal-sensing G-protein-coupled receptor in addition to a proton-sensing G-protein-coupled receptor, although not all metals that activate hOGR1 activated zOGR1.
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Affiliation(s)
- Jun Negishi
- a Laboratory of Cell Signaling Regulation, Department of Life Sciences, School of Agriculture , Meiji University , Kawasaki , Japan
| | - Yuka Omori
- a Laboratory of Cell Signaling Regulation, Department of Life Sciences, School of Agriculture , Meiji University , Kawasaki , Japan
| | - Mami Shindo
- a Laboratory of Cell Signaling Regulation, Department of Life Sciences, School of Agriculture , Meiji University , Kawasaki , Japan
| | - Hayate Takanashi
- a Laboratory of Cell Signaling Regulation, Department of Life Sciences, School of Agriculture , Meiji University , Kawasaki , Japan
| | - Shiori Musha
- a Laboratory of Cell Signaling Regulation, Department of Life Sciences, School of Agriculture , Meiji University , Kawasaki , Japan
| | - Suminori Nagayama
- a Laboratory of Cell Signaling Regulation, Department of Life Sciences, School of Agriculture , Meiji University , Kawasaki , Japan
| | - Jun Hirayama
- b Department of Developmental and Regenerative Biology , Medical Research Institute, Tokyo Medical and Dental University , Tokyo , Japan
| | - Hiroshi Nishina
- b Department of Developmental and Regenerative Biology , Medical Research Institute, Tokyo Medical and Dental University , Tokyo , Japan
| | - Takashi Nakakura
- c Department of Anatomy, Graduate School of Medicine , Teikyo University , Tokyo , Japan
| | - Chihiro Mogi
- d Laboratory of Signal Transduction, Department of Molecular Medicine , Institute for Molecular and Cellular Regulation, Gunma University , Maebashi , Japan
| | - Koichi Sato
- d Laboratory of Signal Transduction, Department of Molecular Medicine , Institute for Molecular and Cellular Regulation, Gunma University , Maebashi , Japan
| | - Fumikazu Okajima
- e Laboratory of Pathophysiology, Department of Pharmacy, Faculty of Pharmaceutical Sciences , Aomori University , Aomori , Japan
| | - Yuta Mochimaru
- a Laboratory of Cell Signaling Regulation, Department of Life Sciences, School of Agriculture , Meiji University , Kawasaki , Japan
| | - Hideaki Tomura
- a Laboratory of Cell Signaling Regulation, Department of Life Sciences, School of Agriculture , Meiji University , Kawasaki , Japan.,f Institute of Endocrinology, Meiji University , Kawasaki , Japan
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43
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Hirayama J, Fujihara M, Shiba M, Ishikawa Y, Satake M, Tadokoro K, Takamoto S. Influence of a 6-h interruption of agitation on in vitro properties of volume-reduced washed platelets in M-sol additive solution. Transfus Med 2016; 26:303-4. [PMID: 27197047 DOI: 10.1111/tme.12313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 10/14/2015] [Accepted: 11/28/2015] [Indexed: 11/29/2022]
Affiliation(s)
- J Hirayama
- Research and Development Department, Japanese Red Cross Central Blood Institute, Tokyo, Japan.
| | - M Fujihara
- Japanese Red Cross Hokkaido Block Blood Center, Sapporo, Japan
| | - M Shiba
- Research and Development Department, Japanese Red Cross Central Blood Institute, Tokyo, Japan
| | - Y Ishikawa
- Research and Development Department, Japanese Red Cross Central Blood Institute, Tokyo, Japan
| | - M Satake
- Research and Development Department, Japanese Red Cross Central Blood Institute, Tokyo, Japan
| | - K Tadokoro
- Research and Development Department, Japanese Red Cross Central Blood Institute, Tokyo, Japan
| | - S Takamoto
- Japanese Red Cross Hokkaido Block Blood Center, Sapporo, Japan
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44
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Hirayama J, Kamiya Y. Combining the Photocatalyst Pt/TiO2 and the Nonphotocatalyst SnPd/Al2O3 for Effective Photocatalytic Purification of Groundwater Polluted with Nitrate. ACS Catal 2014. [DOI: 10.1021/cs5003564] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jun Hirayama
- Graduate School of Environmental Science, ‡Research Faculty of Environmental
Earth Science, Hokkaido University, Nishi 5, Kita 10, Kita-ku, Sapporo 060-0810, Japan
| | - Yuichi Kamiya
- Graduate School of Environmental Science, ‡Research Faculty of Environmental
Earth Science, Hokkaido University, Nishi 5, Kita 10, Kita-ku, Sapporo 060-0810, Japan
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45
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Shimomura T, Miyamura N, Hata S, Miura R, Hirayama J, Nishina H. The PDZ-binding motif of Yes-associated protein is required for its co-activation of TEAD-mediated CTGF transcription and oncogenic cell transforming activity. Biochem Biophys Res Commun 2013; 443:917-23. [PMID: 24380865 DOI: 10.1016/j.bbrc.2013.12.100] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Accepted: 12/12/2013] [Indexed: 01/03/2023]
Abstract
YAP is a transcriptional co-activator that acts downstream of the Hippo signaling pathway and regulates multiple cellular processes, including proliferation. Hippo pathway-dependent phosphorylation of YAP negatively regulates its function. Conversely, attenuation of Hippo-mediated phosphorylation of YAP increases its ability to stimulate proliferation and eventually induces oncogenic transformation. The C-terminus of YAP contains a highly conserved PDZ-binding motif that regulates YAP's functions in multiple ways. However, to date, the importance of the PDZ-binding motif to the oncogenic cell transforming activity of YAP has not been determined. In this study, we disrupted the PDZ-binding motif in the YAP (5SA) protein, in which the sites normally targeted by Hippo pathway-dependent phosphorylation are mutated. We found that loss of the PDZ-binding motif significantly inhibited the oncogenic transformation of cultured cells induced by YAP (5SA). In addition, the increased nuclear localization of YAP (5SA) and its enhanced activation of TEAD-dependent transcription of the cell proliferation gene CTGF were strongly reduced when the PDZ-binding motif was deleted. Similarly, in mouse liver, deletion of the PDZ-binding motif suppressed nuclear localization of YAP (5SA) and YAP (5SA)-induced CTGF expression. Taken together, our results indicate that the PDZ-binding motif of YAP is critical for YAP-mediated oncogenesis, and that this effect is mediated by YAP's co-activation of TEAD-mediated CTGF transcription.
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Affiliation(s)
- Tadanori Shimomura
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Norio Miyamura
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Shoji Hata
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Ryota Miura
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Jun Hirayama
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan.
| | - Hiroshi Nishina
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan.
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46
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Egg M, Köblitz L, Hirayama J, Schwerte T, Folterbauer C, Kurz A, Fiechtner B, Möst M, Salvenmoser W, Sassone-Corsi P, Pelster B. Linking oxygen to time: the bidirectional interaction between the hypoxic signaling pathway and the circadian clock. Chronobiol Int 2013; 30:510-29. [PMID: 23421720 DOI: 10.3109/07420528.2012.754447] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The circadian clock and the hypoxic signaling pathway play critical roles in physiological homeostasis as well as in tumorgenesis. Interactions between both pathways have repeatedly been reported for mammals during the last decade, the molecular basis, though, has not been identified so far. Expression levels of oxygen-regulated and circadian clock genes in zebrafish larvae (Danio rerio) and zebrafish cell lines were significantly altered under hypoxic conditions. Thus, long-term hypoxic incubation of larvae resulted in a dampening of the diurnal oscillation amplitude of the period1 gene expression starting only several hours after start of the hypoxic incubation. A significant decrease in the amplitude of the period1 circadian oscillation in response to hypoxia and in response to the hypoxic mimic CoCl2 was also observed using a zebrafish luciferase reporter cell line in constant darkness. In addition, activity measurements of zebrafish larvae using an infrared-sensitive camera demonstrated the loss of their usual circadian activity pattern under hypoxic conditions. To explore the functional basis of the observed cross-talk between both signaling pathways ChIP assays were performed. Increasing with the duration of hypoxia, a nearly 4-fold occupancy of hypoxia-inducible factor 1 (Hif-1α) at two specific E-box binding sites located in the period1 gene control region was shown, demonstrating therewith the transcriptional co-regulation of the core clock gene by the major transcription factor of the hypoxic pathway. On the other hand, circadian transgenic zebrafish cells, simulating a repressed or an overstimulated circadian clock, modified gene transcription levels of oxygen-regulated genes such as erythropoietin and vascular endothelial growth factor 165 and altered the hypoxia-induced increase in Hif-1α protein concentration. In addition, the amount of Hif-1α protein accumulated during the hypoxic response was shown to depend on the time of the day, with one maximum during the light phase and a second one during the dark phase. The direct binding of Hif-1α to the period1 gene control region provides a mechanistic explanation for the repeatedly observed interaction between hypoxia and the circadian clock. The cross-talk between both major signaling pathways was shown for the first time to be bidirectional and may provide the advantage of orchestrating a broad range of genes and metabolic pathways to cope with altered oxygen availabilities.
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Affiliation(s)
- Margit Egg
- Institut für Zoologie, Universität Innsbruck, Innsbruck, Austria.
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47
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Nakajima T, Tazumi A, Hirayama J, Hayashi K, Tasaki E, Asakura M, Yamasaki S, Moored JE, Millar BC, Matsubarak K, Matsuda M. Expression and analysis of a cytolethal distending toxin (cdt) gene operon in Campylobacter lari. Br J Biomed Sci 2012; 69:26-30. [PMID: 22558801 DOI: 10.1080/09674845.2012.11669918] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The present study examines the expression of cytolethal distending toxin (cdt) gene encoding a cytotoxin in Campylobacter lari (n=6 urease-negative [UN] C. lari; n=4 urease-positive thermophilic Campylobacter [UPTC]). When reverse transcription polymerase chain reaction (RT-PCR) was carried out with 10 C. lari isolates using a primer pair to amplify the cdtB gene transcript segment, an approximate 260 bp RT-PCR amplicon was generated with all the isolates. In addition, cdtA, cdtB and cdtC gene operon was identified to be polycistronicly transcribed in the C. lari cells. The cdtB gene translation in the C. lari cells was also confirmed by Western blot analysis. Thus, the cdt gene operon in C. lari organisms, including UN C. lari and UPTC, was expressed at the transcriptional and translational levels in the cells. The present results suggest that all three cdt genes may be functional in the cells.
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Affiliation(s)
- T Nakajima
- Laboratory of Molecular Biology, Graduate School of Environmental Health Sciences, Azabu University, Sagamihara, Japan
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48
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Hirayama J, Hayashi K, Goldsmith CE, Coulter WA, Millar BC, Dooley JSG, Matsuda M, Moore JE. Polymerase chain reaction amplification: effect of dyes and other staining agents employed in clinical microbiology laboratories. Br J Biomed Sci 2012; 69:35-7. [PMID: 22558804 DOI: 10.1080/09674845.2012.11978243] [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: 10/18/2022]
Affiliation(s)
- J Hirayama
- Northern Ireland Public Health Laboratory, Department of Bacteriology, Belfast City Hospital, Belfast, Northern Ireland, UK
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49
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Hata S, Hirayama J, Kajiho H, Nakagawa K, Hata Y, Katada T, Furutani-Seiki M, Nishina H. A novel acetylation cycle of transcription co-activator Yes-associated protein that is downstream of Hippo pathway is triggered in response to SN2 alkylating agents. J Biol Chem 2012; 287:22089-98. [PMID: 22544757 DOI: 10.1074/jbc.m111.334714] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Yes-associated protein (YAP) is a transcriptional co-activator that acts downstream of the Hippo signaling pathway and regulates multiple cellular processes. Although cytoplasmic retention of YAP is known to be mediated by Hippo pathway-dependent phosphorylation, post-translational modifications that regulate YAP in the nucleus remain unclear. Here we report the discovery of a novel cycle of acetylation/deacetylation of nuclear YAP induced in response to S(N)2 alkylating agents. We show that after treatment of cells with the S(N)2 alkylating agent methyl methanesulfonate, YAP phosphorylation mediated by the Hippo pathway is markedly reduced, leading to nuclear translocation of YAP and its acetylation. This YAP acetylation occurs on specific and highly conserved C-terminal lysine residues and is mediated by the nuclear acetyltransferases CBP (CREB binding protein) and p300. Conversely, the nuclear deacetylase SIRT1 is responsible for YAP deacetylation. Intriguingly, we found that YAP acetylation is induced specifically by S(N)2 alkylating agents and not by other DNA-damaging stimuli. These results identify a novel YAP acetylation cycle that occurs in the nucleus downstream of the Hippo pathway. Intriguingly, our findings also indicate that YAP acetylation is involved in responses to a specific type of DNA damage.
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Affiliation(s)
- Shoji Hata
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
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50
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Hirayama J, Kondo H, Miura YK, Abe R, Kamiya Y. Highly effective photocatalytic system comprising semiconductor photocatalyst and supported bimetallic non-photocatalyst for selective reduction of nitrate to nitrogen in water. CATAL COMMUN 2012. [DOI: 10.1016/j.catcom.2012.01.011] [Citation(s) in RCA: 31] [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: 10/14/2022] Open
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