1
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Kasahara H, Saito K, Seki T, Mutoh T. The design of a slit ICRF antenna in EU-DEMO. Fusion Engineering and Design 2023. [DOI: 10.1016/j.fusengdes.2023.113453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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2
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Saito K, Wang S, Wi H, Kim H, Kamio S, Nomura G, Seki R, Seki T, Kasahara H, Mutoh T. Development of power combination system for high-power and long-pulse ICRF heating in LHD. Fusion Engineering and Design 2019. [DOI: 10.1016/j.fusengdes.2018.12.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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3
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Ikeda M, Kasahara H, Nagashima K, Fujita Y, Ikeda Y. CSF and neuroimaging markers of ad presenting cortical superficial siderosis. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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4
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Matsushita M, Ozawa K, Suzuki T, Nakamura M, Nakano N, Kanchi S, Ichikawa D, Matsuki E, Sakurai M, Karigane D, Kasahara H, Tsukamoto N, Shimizu T, Mori T, Nakajima H, Okamoto S, Kawakami Y, Hattori Y. CXorf48 is a potential therapeutic target for achieving treatment-free remission in CML patients. Blood Cancer J 2017; 7:e601. [PMID: 28862699 PMCID: PMC5709753 DOI: 10.1038/bcj.2017.84] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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: 07/20/2017] [Accepted: 07/24/2017] [Indexed: 12/19/2022] Open
Abstract
Although the introduction of tyrosine kinase inhibitors (TKIs) has improved overall survival of patients with chronic myeloid leukemia (CML), about half of the patients eventually relapse after cessation of TKIs. In contrast, the remainder of the patients maintain molecular remission without TKIs, indicating that the patients' immune system could control proliferation of TKI-resistant leukemic stem cells (LSCs). However, the precise mechanism of immunity against CML-LSCs is not fully understood. We have identified a novel immune target, CXorf48, expressed in LSCs of CML patients. Cytotoxic T cells (CTLs) induced by the epitope peptide derived from CXorf48 recognized CD34+CD38- cells obtained from the bone marrow of CML patients. We detected CXorf48-specific CTLs in the peripheral blood mononuclear cells from CML patients who have discontinued imatinib after maintaining complete molecular remission for more than 2 years. Significantly, the relapse rate of CXorf48-specific CTL-negative patients was 63.6%, compared to 0% in CXorf48-specific CTL-positive patients. These results indicate that CXorf48 could be a promising therapeutic target of LSCs for immunotherapy to obtain durable treatment-free remission in CML patients.
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Affiliation(s)
- M Matsushita
- Division of Clinical Physiology and Therapeutics, Keio University, Faculty of Pharmacy, Shiabakoen, Minato-ku, Tokyo, Japan
| | - K Ozawa
- Division of Clinical Physiology and Therapeutics, Keio University, Faculty of Pharmacy, Shiabakoen, Minato-ku, Tokyo, Japan
| | - T Suzuki
- Division of Clinical Physiology and Therapeutics, Keio University, Faculty of Pharmacy, Shiabakoen, Minato-ku, Tokyo, Japan
| | - M Nakamura
- Division of Clinical Physiology and Therapeutics, Keio University, Faculty of Pharmacy, Shiabakoen, Minato-ku, Tokyo, Japan
| | - N Nakano
- Division of Clinical Physiology and Therapeutics, Keio University, Faculty of Pharmacy, Shiabakoen, Minato-ku, Tokyo, Japan
| | - S Kanchi
- Division of Clinical Physiology and Therapeutics, Keio University, Faculty of Pharmacy, Shiabakoen, Minato-ku, Tokyo, Japan
| | - D Ichikawa
- Division of Clinical Physiology and Therapeutics, Keio University, Faculty of Pharmacy, Shiabakoen, Minato-ku, Tokyo, Japan
| | - E Matsuki
- Division of Hematology, Department of Medicine, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan
| | - M Sakurai
- Division of Hematology, Department of Medicine, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan
| | - D Karigane
- Division of Hematology, Department of Medicine, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan
| | - H Kasahara
- Division of Hematology, Department of Medicine, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan
| | - N Tsukamoto
- Division of Cellular Signaling, Institute for Advanced Medical Research, Keio University, School of Medicine, Shinjuku-ku, Tokyo, Japan
| | - T Shimizu
- Division of Hematology, Department of Medicine, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan
| | - T Mori
- Division of Hematology, Department of Medicine, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan
| | - H Nakajima
- Division of Hematology, Department of Medicine, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan.,Department of Stem Cell and Immune Regulation, Yokohama City University Graduate School of Medicine, Kanazawa-ku, Yokohama, Japan
| | - S Okamoto
- Division of Hematology, Department of Medicine, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan
| | - Y Kawakami
- Division of Cellular Signaling, Institute for Advanced Medical Research, Keio University, School of Medicine, Shinjuku-ku, Tokyo, Japan
| | - Y Hattori
- Division of Clinical Physiology and Therapeutics, Keio University, Faculty of Pharmacy, Shiabakoen, Minato-ku, Tokyo, Japan
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5
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Osakabe M, Takeiri Y, Morisaki T, Motojima G, Ogawa K, Isobe M, Tanaka M, Murakami S, Shimizu A, Nagaoka K, Takahashi H, Nagasaki K, Takahashi H, Fujita T, Oya Y, Sakamoto M, Ueda Y, Akiyama T, Kasahara H, Sakakibara S, Sakamoto R, Tokitani M, Yamada H, Yokoyama M, Yoshimura Y. Current Status of Large Helical Device and Its Prospect for Deuterium Experiment. Fusion Science and Technology 2017. [DOI: 10.1080/15361055.2017.1335145] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- M. Osakabe
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - T. Morisaki
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - G. Motojima
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K. Ogawa
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M. Isobe
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M. Tanaka
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - S. Murakami
- Kyoto University, Department of Mechanical Engineering and Science, Kyoto 615-8540, Japan
| | - A. Shimizu
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - H. Takahashi
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K. Nagasaki
- Kyoto University, Institute of Advanced Energy, Gokasho, Uji, Kyoto 611-0011, Japan
| | - H. Takahashi
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - T. Fujita
- Nagoya University, Department of Energy Engineering and Science, Graduate School of Engineering, Furo-cho, Chikusa-ku, Nagoya 464-8093, Japan
| | - Y. Oya
- Shizuoka University, Radioscience Research Laboratory, Faculty of Science, 836, Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - M. Sakamoto
- University of Tsukuba, Plasma Research Center, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Ueda
- Osaka University, Graduate School of Engineering, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - T. Akiyama
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - H. Kasahara
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - S Sakakibara
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - R. Sakamoto
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M. Tokitani
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - H. Yamada
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M. Yokoyama
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
- SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - Y. Yoshimura
- National Institute for Fusion Science, Natural Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
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6
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Kumazawa R, Mutoh T, Saito K, Seki T, Kasahara H, Tokitani M, Masuzaki S, Ashikawa N, Nakamura Y, Kubo S, Shimozuma T, Yoshimura Y, Igami H, Takahashi H, Takeiri Y, Tsumori K, Osakabe M, Ikeda K, Nagaoka K, Kaneko O, Goto M, Sato K, Chikaraishi H, Ida K, Nagayama Y, Zhao Y, Kwak JG, Yoon JS. Progress in Steady-State Plasma Operation Using ICRF Heating on LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10839] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- R. Kumazawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Mutoh
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Saito
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Seki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Kasahara
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Tokitani
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Masuzaki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Ashikawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Nakamura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Kubo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Shimozuma
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Yoshimura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Igami
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Takahashi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Tsumori
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ikeda
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - O. Kaneko
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Goto
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Sato
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Chikaraishi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ida
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Nagayama
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Zhao
- Institute of Plasma Physics, Chinese Academy of Science, Hefei 230031, China
| | - J. G. Kwak
- Korea Advanced Energy Research Institute, 150 Deogjin-dong, Yuseong-gu, Daejeon, Republic of Korea
| | - J. S. Yoon
- Korea Advanced Energy Research Institute, 150 Deogjin-dong, Yuseong-gu, Daejeon, Republic of Korea
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7
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Saito K, Kumazawa R, Seki T, Kasahara H, Osakabe M, Isobe M, Shimpo F, Nomura G, Watari T, Murakami S, Sasao M, Mutoh T. ICRF Heating and Ion Tail Formation in LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10838] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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)
- K. Saito
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - R. Kumazawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Seki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Kasahara
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Isobe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - F. Shimpo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - G. Nomura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Watari
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Murakami
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - M. Sasao
- Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
| | - T. Mutoh
- National Institute for Fusion Science, Toki 509-5292, Japan
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8
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Affiliation(s)
- T. Mutoh
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - R. Kumazawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Seki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Saito
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Kasahara
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - F. Shimpo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - G. Nomura
- National Institute for Fusion Science, Toki 509-5292, Japan
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9
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Seki T, Mutoh T, Kumazawa R, Saito K, Nakamura Y, Sakamoto M, Watanabe T, Kubo S, Shimozuma T, Yoshimura Y, Igami H, Ohkubo K, Takeiri Y, Oka Y, Tsumori K, Osakabe M, Ikeda K, Nagaoka K, Kaneko O, Miyazawa J, Morita S, Narihara K, Shoji M, Masuzaki S, Goto M, Morisaki T, Peterson BJ, Sato K, Tokuzawa T, Ashikawa N, Nishimura K, Funaba H, Chikaraishi H, Takeuchi N, Notake T, Ogawa H, Torii Y, Shimpo F, Nomura G, Yokota M, Takahashi C, Kato A, Takase Y, Kasahara H, Ichimura M, Higaki H, Zhao YP, Kwak JG, Yamada H, Kawahata K, Ohyabu N, Ida K, Nagayama Y, Noda N, Watari T, Komori A, Sudo S, Motojima O. Study of Long-Pulse Plasma Experiment Using ICRF Heating in LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst06-a1234] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Seki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Mutoh
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - R. Kumazawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Saito
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Nakamura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | | | - T. Watanabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Kubo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Shimozuma
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Yoshimura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Igami
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ohkubo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Oka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Tsumori
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ikeda
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - O. Kaneko
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - J. Miyazawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Morita
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Narihara
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Shoji
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Masuzaki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Goto
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Morisaki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - B. J. Peterson
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Sato
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Tokuzawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Ashikawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Nishimura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Funaba
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Chikaraishi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Takeuchi
- Nagoya University, Faculty of Engineering, Nagoya 464-8601, Japan
| | - T. Notake
- Nagoya University, Faculty of Engineering, Nagoya 464-8601, Japan
| | - H. Ogawa
- Graduate University for Advanced Studies, Hayama 240-0162, Japan
| | - Y. Torii
- Kyoto University, Institute of Advanced Energy, Uji 611-0011, Japan
| | - F. Shimpo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - G. Nomura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Yokota
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - C. Takahashi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - A. Kato
- National Institute for Fusion Science, Toki 509-5292, Japan
| | | | | | | | - H. Higaki
- University of Tsukuba, Tsukuba, Japan
| | - Y. P. Zhao
- Institute of Plasma Physics, Academia Sinica, Hefei 230031, P.R. China
| | - J. G. Kwak
- Korea Atomic Energy Research Institute, Daejeon 305-600, Korea Rep
| | - H. Yamada
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Kawahata
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Ohyabu
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ida
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Nagayama
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Noda
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Watari
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - A. Komori
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Sudo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - O. Motojima
- National Institute for Fusion Science, Toki 509-5292, Japan
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10
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Mutoh* T, Nagaoka K, Takahashi H, Kasahara H, Osakabe M, Kubo S, Shimozuma T, Yoshimura Y, Tsumori K, Seki T, Saito K, Igami H, Nakano H, Ikeda K, Kisaki M, Seki R, Kamio S, Ii T, Nakamura Y, Takeiri Y, Kaneko O. High Power Heating and Steady State Operation in the Large Helical Device. Fusion Science and Technology 2017. [DOI: 10.13182/fst15-120] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Mutoh*
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - H. Takahashi
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - H. Kasahara
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - S. Kubo
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - T. Shimozuma
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - Y. Yoshimura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - K. Tsumori
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - T. Seki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - K. Saito
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - H. Igami
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - H. Nakano
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - K. Ikeda
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - M. Kisaki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - R. Seki
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - S. Kamio
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - T. Ii
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - Y. Nakamura
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
| | - O. Kaneko
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, 509-5292, Japan
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11
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Kasahara H, Mori T, Kato J, Koda Y, Kohashi S, Kikuchi T, Sakurai M, Yamane Y, Mikami S, Kameyama K, Takahashi Y, Okamoto S. Post-transplant lymphoproliferative disorder of the adrenal gland after allogeneic hematopoietic stem cell transplantation: report of two cases and literature review. Transpl Infect Dis 2015; 17:909-14. [DOI: 10.1111/tid.12461] [Citation(s) in RCA: 3] [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] [Received: 08/06/2015] [Revised: 08/24/2015] [Accepted: 08/26/2015] [Indexed: 12/01/2022]
Affiliation(s)
- H. Kasahara
- Division of Hematology; Department of Medicine; Keio University Hospital; Tokyo Japan
| | - T. Mori
- Division of Hematology; Department of Medicine; Keio University Hospital; Tokyo Japan
| | - J. Kato
- Division of Hematology; Department of Medicine; Keio University Hospital; Tokyo Japan
| | - Y. Koda
- Division of Hematology; Department of Medicine; Keio University Hospital; Tokyo Japan
| | - S. Kohashi
- Division of Hematology; Department of Medicine; Keio University Hospital; Tokyo Japan
| | - T. Kikuchi
- Division of Hematology; Department of Medicine; Keio University Hospital; Tokyo Japan
| | - M. Sakurai
- Division of Hematology; Department of Medicine; Keio University Hospital; Tokyo Japan
| | - Y. Yamane
- Division of Hematology; Department of Medicine; Keio University Hospital; Tokyo Japan
| | - S. Mikami
- Division of Diagnostic Pathology; Keio University Hospital; Tokyo Japan
| | - K. Kameyama
- Division of Diagnostic Pathology; Keio University Hospital; Tokyo Japan
| | - Y. Takahashi
- Department of Pediatrics; Nagoya University Graduate School of Medicine; Nagoya Japan
| | - S. Okamoto
- Division of Hematology; Department of Medicine; Keio University Hospital; Tokyo Japan
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12
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Kasahara H, Tomita T, Bohgaki M, Koike T. FRI0589 Use of Ultrasonography and Tomosynthesis Can Improve the Diagnostic Performance of Early Rheumatoid Arthritis. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.3242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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13
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Yoshimura Y, Kasahara H, Nagasaki K, Tokitani M, Ashikawa N, Ueda Y, Ito S, Kubo S, Shimozuma T, Igami H, Takahashi H, Nishiura M, Kobayashi S, Mizuno Y, Okada K, Ogasawara S, Makino R, Yamada I, Tokuzawa T, Tanaka K, Mutoh T, Yamada H. Long-pulse Plasma Discharges by Upgraded ECH System in the LHD. EPJ Web of Conferences 2015. [DOI: 10.1051/epjconf/20158702020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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14
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Bohgaki M, Kasahara H, Shimizu Y, Hattori T, Yasojima N, Kamishima T, Koike T. AB0994 Usefulness of Tomosynthesis in the Diagnosis of Early Rheumatoid Arthritis. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.3990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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15
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Hoson T, Soga K, Wakabayashi K, Hashimoto T, Karahara I, Yano S, Tanigaki F, Shimazu T, Kasahara H, Masuda D, Kamisaka S. Growth stimulation in inflorescences of an Arabidopsis tubulin mutant under microgravity conditions in space. Plant Biol (Stuttg) 2014; 16 Suppl 1:91-6. [PMID: 24148142 DOI: 10.1111/plb.12099] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Accepted: 07/18/2013] [Indexed: 05/24/2023]
Abstract
Cortical microtubules are involved in plant resistance to hypergravity, but their roles in resistance to 1 g gravity are still uncertain. To clarify this point, we cultivated an Arabidopsis α-tubulin 6 mutant (tua6) in the Cell Biology Experiment Facility on the Kibo Module of the International Space Station, and analyzed growth and cell wall mechanical properties of inflorescences. Growth of inflorescence stems was stimulated under microgravity conditions, as compared with ground and on-orbit 1 g conditions. The stems were 10-45% longer and their growth rate 15-55% higher under microgravity conditions than those under both 1 g conditions. The degree of growth stimulation tended to be higher in the tua6 mutant than the wild-type Columbia. Under microgravity conditions, the cell wall extensibility in elongating regions of inflorescences was significantly higher than the controls, suggesting that growth stimulation was caused by cell wall modifications. No clear differences were detected in any growth or cell wall property between ground and on-orbit 1 g controls. These results support the hypothesis that cortical microtubules generally play an important role in plant resistance to the gravitational force.
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Affiliation(s)
- T Hoson
- Department of Biology, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka, Japan
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16
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Saito K, Seki T, Kasahara H, Seki R, Kumazawa R, Nomura G, Shimpo F, Mutoh T. Design of optimized impedance transformer for ICRF antenna in LHD. Fusion Engineering and Design 2013. [DOI: 10.1016/j.fusengdes.2013.02.100] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Saito K, Kumazawa R, Seki T, Kasahara H, Yokota M, Nomura G, Shimpo F, Mutoh T. Current phase control test based on real-time measurement of impedance matrix of ICRF antennas. Fusion Engineering and Design 2011. [DOI: 10.1016/j.fusengdes.2011.02.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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18
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Suzuki T, Kasahara H. Determination of the specific surface free energy of natural quartz crystals using measurement of contact angle of liquid droplets. Cryst Res Technol 2010. [DOI: 10.1002/crat.201000308] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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19
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Tamura T, Mitsumori K, Muto S, Kasahara H, Kobayashi S, Okuhara Y, Hayashi M, Nagasawa T, Onozato T, Kuroda J. Fifty-two week chronic toxicity of enzymatically decomposed rutin in Wistar rats. Food Chem Toxicol 2010; 48:2312-8. [DOI: 10.1016/j.fct.2010.05.065] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2009] [Revised: 04/30/2010] [Accepted: 05/24/2010] [Indexed: 10/19/2022]
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20
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Yamada H, Imagawa S, Takeiri Y, Kaneko O, Mutoh T, Mito T, Chikaraishi H, Hamaguchi S, Ida K, Igami H, Ikeda K, Kasahara H, Kobayashi M, Kubo S, Kumazawa R, Maekawa R, Masuzaki S, Miyazawa J, Morisaki T, Morita S, Nagaoka K, Nakamura Y, Narushima Y, Osakabe M, Saito K, Sakakibara S, Sakamoto R, Seki T, Shimozuma T, Shoji M, Suzuki Y, Takahata K, Tamura H, Tsumori K, Watanabe K, Yamada S, Yanagi N, Yoshimura Y, Kawahata K, Ohyabu N, Komori A, Motojima O. 10 years of engineering and physics achievements by the Large Helical Device project. Fusion Engineering and Design 2009. [DOI: 10.1016/j.fusengdes.2009.01.068] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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21
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Kasahara H, Seki T, Kumazawa R, Saito K, Mutoh T, Kubo S, Shimozuma T, Igami H, Yoshimura Y, Takahashi H, Yamada I, Tokuzawa T, Ohdachi S, Morita S, Nomura G, Shimpo F, Komori A, Motojima O, Oosako T, Takase Y, Zhao Y, Kwak J. The observation of nonlinear ion cyclotron wave excitation during high-harmonic fast wave heating in the large helical device. Rev Sci Instrum 2008; 79:10E722. [PMID: 19044539 DOI: 10.1063/1.2973325] [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] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A wave detector, a newly designed magnetic probe, is installed in the large helical device (LHD). This wave detector is a 100-turn loop coil with electrostatic shield. Comparing a one-loop coil to this detector, this detector has roughly constant power coupling in the lower frequency range of 40 MHz, and it can easily detect magnetic wave in the frequency of a few megahertz. During high-harmonic fast wave heating, lower frequency waves (<10 MHz) were observed in the LHD for the first time, and for the power density threshold of lower frequency wave excitation (7.5 MHz) the power density of excited pumped wave (38.47 MHz) was approximately -46 dBmHz. These lower frequencies are kept constant for electron density and high energy particle distribution, and these lower frequency waves seem to be ion cyclotron waves caused by nonlinear wave-particle interaction, for example, parametric decay instability.
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Affiliation(s)
- H Kasahara
- National Institute for Fusion Science, Toki 509-5292, Japan.
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22
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Ozaki T, Goncharov P, Veshchev E, Tamura N, Sudo S, Seki T, Kasahara H, Takase Y, Ohsako T. Pellet charge exchange helium measurement using neutral particle analyzer in large helical device. Rev Sci Instrum 2008; 79:10E518. [PMID: 19044500 DOI: 10.1063/1.2978191] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
It is very important to investigate the confinement of alpha particles, which will be produced by nuclear reactions in ITER and fusion reactors. The pellet charge exchange (PCX) measurement is one of the most powerful methods because it can directly provide the profile of the alpha particle energy spectra in a plasma. In the large helical device, PCX using tracer encapsulated solid pellet (TESPEL) has been tried in many hydrogen and helium plasmas, including helium accelerated by using the cyclotron resonance heating. In the PCX, we use the compact neutral particle analyzer without simultaneous mass separation ability. The helium particle measurement can be achieved by the application of voltage in the condenser plate. The scattering of hydrogen particle is carefully considered during the estimation of the helium amount. The radial helium profiles can also be obtained by comparing four TESPEL injection shots with/without higher harmonic fast wave heating and at applied plate voltages for He or H, respectively.
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Affiliation(s)
- T Ozaki
- High Energy Particle Group, Wave Heating Group and LHD Experimental Group, National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
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23
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Saito K, Takahashi C, Yokota M, Nomura G, Shimpo F, Seki T, Kasahara H, Kumazawa R, Yoon J, Kwak J, Zhao Y, Mutoh T, Komori A. Real-time impedance matching system for ICRF heating in LHD. Fusion Engineering and Design 2008. [DOI: 10.1016/j.fusengdes.2008.01.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kobayashi M, Ohyabu N, Mutoh T, Kumazawa R, Feng Y, Shoji M, Morisaki T, Masuzaki S, Sagara A, Sakamoto R, Seki T, Miyazawa J, Watanabe T, Goto M, Ideda K, Kasahara H, Morita S, Peterson BJ, Ashikawa N, Saito K, Sakakibara S, Tokuzawa T, Nakamura Y, Narihara K, Yamada I, Yamada H, Komori A, Motojima O. Edge Transport Control with the Local Island Divertor and Recent Progress in LHD. Fusion Science and Technology 2007. [DOI: 10.13182/fst07-a1549] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Kobayashi
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - N. Ohyabu
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - T. Mutoh
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - R. Kumazawa
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - Y. Feng
- Max-Planck-Institute fuer Plasmaphysik, Teilinstitut Greifswald, Euratom Association, 17491 Greifswald, Germany
| | - M. Shoji
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - T. Morisaki
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - S. Masuzaki
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - A. Sagara
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - R. Sakamoto
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - T. Seki
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - J. Miyazawa
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - T. Watanabe
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - M. Goto
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - K. Ideda
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - H. Kasahara
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - S. Morita
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - B. J. Peterson
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - N. Ashikawa
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - K. Saito
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - S. Sakakibara
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - T. Tokuzawa
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - Y. Nakamura
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - K. Narihara
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - I. Yamada
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - H. Yamada
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - A. Komori
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
| | - O. Motojima
- National Institute for Fusion Science, Oroshi-cho 322-6, Toki city, 509-5292, Japan
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25
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Yamada T, Ejiri A, Shimada Y, Oosako T, Tsujimura J, Takase Y, Kasahara H. Direct measurement of density oscillation induced by a radio-frequency wave. Rev Sci Instrum 2007; 78:083502. [PMID: 17764321 DOI: 10.1063/1.2769351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
An O-mode reflectometer at a frequency of 25.85 GHz was applied to plasmas heated by the high harmonic fast wave (21 MHz) in the TST-2 spherical tokamak. An oscillation in the phase of the reflected microwave in the rf range was observed directly for the first time. In TST-2, the rf (250 kW) induced density oscillation depends mainly on the poloidal rf electric field, which is estimated to be about 0.2 kV/m rms by the reflectometer measurement. Sideband peaks separated in frequency by ion cyclotron harmonics from 21 MHz, and peaks at ion cyclotron harmonics which are suggested to be quasimodes generated by parametric decay, were detected.
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Affiliation(s)
- T Yamada
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Japan.
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26
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Kasahara H, Komamura K, Glogar D, Kodama K, Hirayama A, Mohl W. Do long term effects after PICSO endorse the potential of cardiac regeneration after acute myocardial infarction? Wien Klin Wochenschr 2007; 119:23-26. [PMID: 19618595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Affiliation(s)
- H Kasahara
- Department of Cardiothoracic Surgery, Medical University of Vienna, Vienna, Austria.
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27
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Shiraiwa S, Hanada K, Hasegawa M, Idei H, Kasahara H, Mitarai O, Nakamura K, Nishino N, Nozato H, Sakamoto M, Sasaki K, Sato K, Takase Y, Yamada T, Zushi H. Heating by an electron Bernstein wave in a spherical tokamak plasma via mode conversion. Phys Rev Lett 2006; 96:185003. [PMID: 16712369 DOI: 10.1103/physrevlett.96.185003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2006] [Indexed: 05/09/2023]
Abstract
The first successful high power heating of a high dielectric constant spherical tokamak plasma by an electron Bernstein wave (EBW) is reported. An EBW was excited by mode conversion (MC) of an mode cyclotron wave injected from the low magnetic field side of the TST-2 spherical tokamak. Evidence of electron heating was observed as increases in the stored energy and soft x-ray emission. The increased emission was concentrated in the plasma core region. A heating efficiency of over 50% was achieved, when the density gradient in the MC region was sufficiently steep.
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Affiliation(s)
- S Shiraiwa
- Graduate School of Frontier Sciences, University of Tokyo, Kashiwa 277-8561, Japan.
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28
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Tang YL, Tang Y, Zhang YC, Agarwal A, Kasahara H, Qian K, Shen L, Phillips MI. A hypoxia-inducible vigilant vector system for activating therapeutic genes in ischemia. Gene Ther 2006; 12:1163-70. [PMID: 15800659 DOI: 10.1038/sj.gt.3302513] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Hypoxia represents an endogenous pathophysiological signal underlying cell growth, adaptation and death in a variety of diseases, including ischemic heart diseases, stroke and solid tumors. A vigilant vector system depends on a gene switch which can sense the hypoxia signal occurring in ischemic events and turn on/off protective gene expressions when necessary. This system uses the oxygen-dependent degradation domain derived from hypoxia-inducible factor 1alpha as the hypoxia sensor and a double-vector system as signal amplifier. For treating ischemic heart diseases, a cardiac-specific MLC-2v promoter is used to deliver transgenes specifically to the heart. When tested in cardiomyocyte cultures, it produced a rapid and robust gene induction upon exposure to low oxygen. In a mouse model for myocardial infarction, the vigilant vectors turned on therapeutic genes such as heme oxygenase-1 in response to ischemia, significantly reduced apoptosis in the infarct area and improved cardiac functions. The hypoxia-regulated gene transfer afforded by the vigilant vectors may provide a powerful tool for delivering therapeutic proteins specifically to ischemic tissues with optimal physiological control.
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Affiliation(s)
- Y L Tang
- Department of Pediatrics, College of Medicine and All Children's Hospital Research Institute, University of South Florida, St Petersburg, FL 33701, USA
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29
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Takeuchi N, Seki T, Saito K, Watari T, Kumazawa R, Mutoh T, Torii Y, Nomura G, Kato A, Shimpo F, Takase Y, Kasahara H, Taniguchi T, Wada H, Kasuya N, Yamagishi K, Moeller CP, Saigusa M, Yanping Z. Studies of the Electrical Properties of the LHD Combline Antenna. Fusion Science and Technology 2005. [DOI: 10.13182/fst05-a1076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- N. Takeuchi
- Nagoya University, Department of Energy Engineering and Science, Furo-cho, Nagoya 464-8603, Japan
| | - T. Seki
- National Institute for Fusion Science, Toki-shi, Gifu 509-5292, Japan
| | - K. Saito
- National Institute for Fusion Science, Toki-shi, Gifu 509-5292, Japan
| | - T. Watari
- National Institute for Fusion Science, Toki-shi, Gifu 509-5292, Japan
| | - R. Kumazawa
- National Institute for Fusion Science, Toki-shi, Gifu 509-5292, Japan
| | - T. Mutoh
- National Institute for Fusion Science, Toki-shi, Gifu 509-5292, Japan
| | - Y. Torii
- Kyoto University Institute of Advanced Energy, Uji-shi, Kyoto 611-0011, Japan
| | - G. Nomura
- National Institute for Fusion Science, Toki-shi, Gifu 509-5292, Japan
| | - A. Kato
- National Institute for Fusion Science, Toki-shi, Gifu 509-5292, Japan
| | - F. Shimpo
- National Institute for Fusion Science, Toki-shi, Gifu 509-5292, Japan
| | - Y. Takase
- University of Tokyo Graduate School of Frontier Sciences and Graduate School Science Kashiwa-shi, Chiba 277-8561, Japan
| | - H. Kasahara
- University of Tokyo Graduate School of Frontier Sciences and Graduate School Science Kashiwa-shi, Chiba 277-8561, Japan
| | - T. Taniguchi
- University of Tokyo Graduate School of Frontier Sciences and Graduate School Science Kashiwa-shi, Chiba 277-8561, Japan
| | - H. Wada
- University of Tokyo Graduate School of Frontier Sciences and Graduate School Science Kashiwa-shi, Chiba 277-8561, Japan
| | - N. Kasuya
- University of Tokyo Graduate School of Frontier Sciences and Graduate School Science Kashiwa-shi, Chiba 277-8561, Japan
| | - K. Yamagishi
- University of Tokyo Graduate School of Frontier Sciences and Graduate School Science Kashiwa-shi, Chiba 277-8561, Japan
| | | | - M. Saigusa
- Ibaraki University, Hitachi-shi, Ibaraki 316-8511, Japan
| | - Z. Yanping
- Institute of Plasma Physics, Academia Sinica, Hofei 230031, China
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Yasuda M, Kiguchi T, Kasahara H, Ogino H, Ishikawa H. Effect of additives on transesterification activity of Rhizopus chinensis lipase. J Biosci Bioeng 2005; 90:681-3. [PMID: 16232933 DOI: 10.1263/jbb.90.681] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2000] [Accepted: 09/26/2000] [Indexed: 11/17/2022]
Abstract
The transesterification activity of powder lipase prepared from the purified lipase of Rhizopus chinensis cells by freeze-drying was quite low compared with that of acetone-dried cells. Additives which could enhance the transesterification activity of the freeze-dried powder lipase were screened. The freeze-dried lipases prepared with certain fatty acid methylesters or certain types of surfactants exhibited high transesterification activity. It was shown that not only the solubility of the freeze-dried lipase in n-hexane but also the organic solvent-stability was enhanced when methyl stearate was added to the lipase solution at the freeze-drying step.
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Affiliation(s)
- M Yasuda
- Department of Chemical Engineering, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Osaka 599-8531, Japan
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Kasahara H. [Clinical characteristics of aged patients with depression]. Seishin Shinkeigaku Zasshi 2002; 103:613-21. [PMID: 11692393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
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32
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Hashimoto S, Narita S, Kasahara H, Shirai K, Kobayashi T, Takanishi A, Sugano S, Yamaguchi J, Sawada H, Takanobu H, Shibuya K, Morita T, Kurata T, Onoe N, Ouchi K, Noguchi T, Niwa Y, Nagayama S, Tabayashi H, Matsui I, Obata M, Matsuzaki H, Murasugi A, Kobayashi T, Haruyama S, Okada T, Hidaki Y, Taguchi Y, Hoashi K, Morikawa E, Iwano Y, Araki D, Suzuki J, Yokoyama M, Dawa I, Nishino D, Inoue S, Hirano T, Soga E, Gen S, Yanada T, Kato K, Sakamoto S, Ishii Y, Matsuo S, Yamamoto Y, Sato K, Hagiwara T, Ueda T, Honda N, Hashimoto K, Hanamoto T, Kayaba S, Kojima T, Iwata H, Kubodera H, Matsuki R, Nakajima T, Nitto K, Yamamoto D, Kamizaki Y, Nagaike S, Kunitake Y, Morita S. Auton Robots 2002; 12:25-38. [DOI: 10.1023/a:1013202723953] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Kasahara H, Levine L, Tynes GK, Levine HG. [Pre-flight ground studies for the Water Offset Nutrient Delivery Experiment (WONDER): a spaceflight payload comparing two nutrient delivery systems for plant growth in space]. Biol Sci Space 2001; 15:232-3. [PMID: 11997618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/18/2023]
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34
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Karamloo F, Wangorsch A, Kasahara H, Davin LB, Haustein D, Lewis NG, Vieths S. Phenylcoumaran benzylic ether and isoflavonoid reductases are a new class of cross-reactive allergens in birch pollen, fruits and vegetables. Eur J Biochem 2001; 268:5310-20. [PMID: 11606193 DOI: 10.1046/j.0014-2956.2001.02463.x] [Citation(s) in RCA: 87] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We investigated the biochemical function of the birch pollen allergen Bet v 6 and its role in the IgE-cross-reactivity between birch pollen and plant foods, and characterized Pyr c 5, a Bet v 6-related food allergen, from pear; the proteins were expressed as His-Tag fusion proteins in Eschershia coli and purified by Ni-chelate affinity chromatography under native conditions. Nonfusion proteins were obtained by factor Xa protease treatment. The highest degree of amino-acid sequence identity of Pyr c 5 and Bet v 6 was found with a plant protein related to a defense mechanism, which we have named phenylcoumaran benzylic ether reductase (PCBER) based on its ability to catalyze the NADPH-dependent reduction of 8-5' linked lignans such as dehydrodiconiferyl alcohol to give isodihydrodehydrodiconiferyl alcohol. Enzymatic assays with recombinant Pyr c 5 and Bet v 6 showed PCBER catalytic activity for both recombinant allergens. Both Pyr c 5 and Bet v 6 allergens had similar IgE binding characteristics in immunoblotting and enzyme allergosorbent tests (EAST), and bound IgE from 10 sera of birch-pollen-allergic patients including six pear-allergic subjects. EAST inhibition experiments with Pyr c 5 as the solid phase antigen suggested that homologous allergens may be present in many vegetable foods such as apple, peach, orange, lychee fruit, strawberry, persimmon, zucchini (courgette), and carrot. In extracts of pear, apple, orange, and persimmon, the presence of proteins of approximately 30-35 kDa containing Bet v 6 cross-reactive epitopes was demonstrated with two Bet v 6-specific monoclonal antibodies. Recombinant Pyr c 5 triggered a strong, dose-dependent mediator release from basophils of a pear-allergic subject, suggesting that Pyr c 5 has the potential to elicit type I allergic reactions.
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Affiliation(s)
- F Karamloo
- Swiss Institute of Allergy and Asthma Research, Davos Platz, Switzerland
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35
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Thomas PS, Kasahara H, Edmonson AM, Izumo S, Yacoub MH, Barton PJ, Gourdie RG. Elevated expression of Nkx-2.5 in developing myocardial conduction cells. Anat Rec 2001; 263:307-13. [PMID: 11455540 DOI: 10.1002/ar.1106] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A number of different phenotypes emerge from the mesoderm-derived cardiomyogenic cells of the embryonic tubular heart, including those comprising the cardiac conduction system. The transcriptional regulation of this phenotypic divergence within the cardiomyogenic lineage remains poorly characterized. A relationship between expression of the transcription factor Nkx-2.5 and patterning to form cardiogenic mesoderm subsequent to gastrulation is well established. Nkx-2.5 mRNA continues to be expressed in myocardium beyond the looped, tubular heart stage. To investigate the role of Nkx-2.5 in later development, we have determined the expression pattern of Nkx-2.5 mRNA by in situ hybridization in embryonic chick, fetal mouse, and human hearts, and of Nkx-2.5 protein by immunolocalization in the embryonic chick heart. As development progresses, significant nonuniformities emerge in Nkx-2.5 expression levels. Relative to surrounding force-generating ("working") myocardium, elevated Nkx-2.5 mRNA signal becomes apparent in the specialized cells of the conduction system. Similar differences are found in developing chick, human, and mouse fetal hearts, and nuclear-localized Nkx-2.5 protein is prominently expressed in differentiating chick conduction cells relative to adjacent working myocytes. This tissue-restricted expression of Nkx-2.5 is transient and correlates with the timing of spatio-temporal recruitment of cells to the central and the peripheral conduction system. Our data represent the first report of a transcription factor showing a stage-dependent restriction to different parts of the developing conduction system, and suggest some commonality in this development between birds and mammals. This dynamic pattern of expression is consistent with the hypothesis that Nkx-2.5, and its level of expression, have a role in regulation and/or maintenance of specialized fate selection by embryonic myocardial cells.
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Affiliation(s)
- P S Thomas
- Department of Cardiothoracic Surgery, Imperial College School of Medicine, National Heart and Lung Institute, Dovehouse Street, London SW3 6LY, United Kingdom.
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36
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Kasahara H, Wakimoto H, Liu M, Maguire CT, Converso KL, Shioi T, Huang WY, Manning WJ, Paul D, Lawitts J, Berul CI, Izumo S. Progressive atrioventricular conduction defects and heart failure in mice expressing a mutant Csx/Nkx2.5 homeoprotein. J Clin Invest 2001; 108:189-201. [PMID: 11457872 PMCID: PMC203028 DOI: 10.1172/jci12694] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2001] [Accepted: 06/04/2001] [Indexed: 11/17/2022] Open
Abstract
A DNA nonbinding mutant of the NK2 class homeoprotein Nkx2.5 dominantly inhibits cardiogenesis in Xenopus embryos, causing a small heart to develop or blocking heart formation entirely. Recently, ten heterozygous CSX/NKX2.5 homeoprotein mutations were identified in patients with congenital atrioventricular (AV) conduction defects. All four missense mutations identified in the human homeodomain led to markedly reduced DNA binding. To examine the effect of a DNA binding-impaired mutant of mouse Csx/Nkx2.5 in the embryonic heart, we generated transgenic mice expressing one such allele, I183P, under the beta-myosin heavy chain promoter. Unexpectedly, transgenic mice were born apparently normal, but the accumulation of Csx/Nkx2.5(I183P) mutant protein in the embryo, neonate, and adult myocardium resulted in progressive and profound cardiac conduction defects and heart failure. P-R prolongation observed at 2 weeks of age rapidly progressed into complete AV block as early as 4 weeks of age. Expression of connexins 40 and 43 was dramatically decreased in the transgenic heart, which may contribute to the conduction defects in the transgenic mice. This transgenic mouse model may be useful in the study of the pathogenesis of cardiac dysfunction associated with CSX/NKX2.5 mutations in humans.
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Affiliation(s)
- H Kasahara
- Cardiovascular Division, Beth Israel Deaconess Medical Center, and Department of Medicine, Children's Hospital, Boston, Massachusetts, USA.
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37
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Kasahara H, Usami M. [Metabolic and nutritional management for treatment of carcinoma of the pancreas--in unresectable cases]. Nihon Rinsho 2001; 59 Suppl 5:650-3. [PMID: 11439620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
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38
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Kasahara H, Usami M. [Metabolic and nutritional management for treatment of carcinoma of the pancreas--in resectable cases]. Nihon Rinsho 2001; 59 Suppl 5:646-9. [PMID: 11439619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
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39
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Usami M, Kotani J, Kasahara H. [Perioperative nutritional support]. Nihon Rinsho 2001; 59 Suppl 5:738-41. [PMID: 11439642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Affiliation(s)
- M Usami
- Faculty of Health Science, Kobe University School of Medicine
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40
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Usami M, Kotani J, Kasahara H. [Preparation of enteral feeds and bacterial contamination]. Nihon Rinsho 2001; 59 Suppl 5:301-5. [PMID: 11439544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Affiliation(s)
- M Usami
- Faculty of Health Science, Kobe University School of Medicine
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41
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Kasahara H, Usheva A, Ueyama T, Aoki H, Horikoshi N, Izumo S. Characterization of homo- and heterodimerization of cardiac Csx/Nkx2.5 homeoprotein. J Biol Chem 2001; 276:4570-80. [PMID: 11042197 DOI: 10.1074/jbc.m004995200] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Csx/Nkx2.5 is an evolutionarily conserved homeodomain (HD)-containing transcription factor that is essential for early cardiac development. We found that the HD of Csx/Nkx2.5 binds as a monomer as well as a dimer to its DNA binding sites in the promoter of the atrial natriuretic factor (ANF) gene, an in vivo target gene of Csx/Nkx2.5. Csx/Nkx2.5 physically interacts with each other in vitro as well as in cells, and the HD is critical for homodimerization. Lys(193) and Arg(194), located at the COOH-terminal end of HD, are essential for dimerization. Lys(193) is also required for a specific interaction with the zinc finger transcription factor GATA4. Csx/Nkx2.5 can heterodimerize with other NK2 homeodomain proteins, Nkx2.3 and Nkx2.6/Tix, with different affinities. A single missense mutation, Ile(183) to Pro in the HD of Csx/Nkx2.5, preserved homodimerization function, but totally abolished DNA binding. Ile(183) --> Pro mutant acts in an inhibitory manner on wild type Csx/Nkx2.5 transcriptional activity through the ANF promoter in 10T1/2 cells. However, Ile(183) --> Pro mutant does not inhibit wild type Csx/Nkx2.5 function on the ANF promoter in cultured neonatal cardiac myocytes, possibly due to failure of dimerization in the presence of the target DNA. These results suggest that complex protein-protein interactions of Csx/Nkx2.5 play a role in its transcriptional regulatory function.
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Affiliation(s)
- H Kasahara
- Cardiovascular Division, Beth Israel Deaconess Medical Center, Department of Medicine, Harvard Medical School, Boston, Massachusetts 02215, USA.
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42
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Guo L, Lynch J, Nakamura K, Fliegel L, Kasahara H, Izumo S, Komuro I, Agellon LB, Michalak M. COUP-TF1 antagonizes Nkx2.5-mediated activation of the calreticulin gene during cardiac development. J Biol Chem 2001; 276:2797-801. [PMID: 11106640 DOI: 10.1074/jbc.c000822200] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Calreticulin, a Ca(2+) binding chaperone of the endoplasmic reticulum, is also highly expressed in the embryonic heart, and knockout of the calreticulin gene is lethal during embryogenesis because of impaired cardiac development. The protein is down-regulated after birth, and elevated expression of calreticulin in newborn hearts is associated with severe cardiac pathology and death. Here we show that the transcription factor Nkx2.5 activates expression of the calreticulin gene in the heart. Binding of chicken ovalbumin upstream promoter-transcription factor 1 to the Nkx2.5 binding site suppresses transcription from the calreticulin promoter. Nkx2.5 and chicken ovalbumin upstream promoter-transcription factor 1 play antagonistic roles in regulating the expression of calreticulin during cardiac development. These studies indicate that cardiac-specific transcription factor Nkx2.5 plays a central role in activating calreticulin expression and that there is a cooperation between chicken ovalbumin upstream promoter-transcription factor 1 and Nkx2.5 at the calreticulin promoter.
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Affiliation(s)
- L Guo
- Canadian Institutes of Health Research Group in Molecular Biology of Membrane Proteins, University of Alberta, Edmonton, Alberta, Canada
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43
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Yamamoto K, Kimura K, Ueda M, Kasahara H, Okada T. Infrared absorption by coupled surface-phonon-surface-plasmon modes in small GaAs crystals. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/18/11/017] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Affiliation(s)
- T Koike
- Department of Medicine II, Hokkaido University School of Medicine, Sapporo, Japan.
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Matsuura E, Inagaki J, Kasahara H, Yamamoto D, Atsumi T, Kobayashi K, Kaihara K, Zhao D, Ichikawa K, Tsutsumi A, Yasuda T, Triplett DA, Koike T. Proteolytic cleavage of beta(2)-glycoprotein I: reduction of antigenicity and the structural relationship. Int Immunol 2000; 12:1183-92. [PMID: 10917893 DOI: 10.1093/intimm/12.8.1183] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Binding of beta(2)-glycoprotein I (beta(2)-GPI)-dependent anticardiolipin antibodies (aCL) derived from antiphospholipid syndrome (APS) is significantly reduced in aCL ELISA due to loss of the phospholipid (PL) binding property of beta(2)-GPI by plasmin treatment. In the present study, the treatment generated a nicked form of beta(2)-GPI and resulted in loss of antigenicity for the autoantibodies detected in ELISA, using an beta(2)-GPI directly adsorbed polyoxygenated carboxylated plate, the assay system of which was not related to PL binding. The nicked form bound to neither Cu(2+)-oxidized low-density lipoprotein (oxLDL) nor to beta(2)-GPI-specific lipid ligands isolated from oxLDL, the result being a complete loss of subsequent binding of anti-beta(2)-GPI autoantibodies. The conformational change in the nicked domain V was predicted from its intact structure determined by an X-ray analysis (implemented in Protein Data Bank: 1C1Z), molecular modeling and epitope mapping of a monoclonal anti-beta(2)-GPI antibody, i.e. Cof-18, which recognizes the related structure. The analysis revealed that novel hydrophobic and electrostatic interactions appeared in domain V after the cleavage, thereby affecting the PL binding of beta(2)-GPI. Such a conformational change may have important implications for exposure of cryptic epitopes located in the domains such as domain IV.
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Affiliation(s)
- E Matsuura
- Department of Cell Chemistry, Institute of Cellular and Molecular Biology, Okayama University Medical School, 2-5-1 Shikata-cho, Okayama 700-8558, Japan
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46
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Ohira H, Tsutsumi A, Yasuda S, Horita T, Takeuchi R, Kasahara H, Miyoshi Y, Atsumi T, Ichikawa K, Koike T. [Severe neuro-Behçet with perforation of the intestine]. Nihon Naika Gakkai Zasshi 2000; 89:1435-7. [PMID: 10934776 DOI: 10.2169/naika.89.1435] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- H Ohira
- Department of Medicine II, Hokkaido University, Sapporo
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47
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Kasahara H, Lee B, Schott JJ, Benson DW, Seidman JG, Seidman CE, Izumo S. Loss of function and inhibitory effects of human CSX/NKX2.5 homeoprotein mutations associated with congenital heart disease. J Clin Invest 2000; 106:299-308. [PMID: 10903346 PMCID: PMC314312 DOI: 10.1172/jci9860] [Citation(s) in RCA: 126] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2000] [Accepted: 06/12/2000] [Indexed: 11/17/2022] Open
Abstract
CSX/NKX2.5 is an evolutionarily conserved homeodomain-containing (HD-containing) transcription factor that is essential for early cardiac development. Recently, ten different heterozygous CSX/NKX2.5 mutations were found in patients with congenital heart defects that are transmitted in an autosomal dominant fashion. To determine the consequence of these mutations, we analyzed nuclear localization, DNA binding, transcriptional activation, and dimerization of mutant CSX/NKX2.5 proteins. All mutant proteins were translated and located to the nucleus, except one splice-donor site mutant whose protein did not accumulate in the cell. All mutants that had truncation or missense mutations in the HD had severely reduced DNA binding activity and little or no transcriptional activation function. In contrast, mutants with intact HDs exhibit normal DNA binding to the monomeric binding site but had three- to ninefold reduction in DNA binding to the dimeric binding sites. HD missense mutations that preserved homodimerization ability inhibited the activation of atrial natriuretic factor by wild-type CSX/NKX2.5. Although our studies do not characterize the genotype-phenotype relationship of the ten human mutations, they identify specific abnormalities of CSX/NKX2.5 function essential for transactivation of target genes.
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Affiliation(s)
- H Kasahara
- Cardiovascular Division, Beth Israel Deaconess Medical Center, Department of Medicine, Harvard Medical School, Boston, Massachusetts, USA
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48
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Tanaka M, Kasahara H, Bartunkova S, Schinke M, Komuro I, Inagaki H, Lee Y, Lyons GE, Izumo S. Vertebrate homologs of tinman and bagpipe: roles of the homeobox genes in cardiovascular development. Dev Genet 2000; 22:239-49. [PMID: 9621431 DOI: 10.1002/(sici)1520-6408(1998)22:3<239::aid-dvg6>3.0.co;2-7] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In Drosophila, dorsal mesodermal specification is regulated by the homeobox genes tinman and bagpipe. Vertebrate homologs of tinman and bagpipe have been isolated in various species. Moreover, there are at least four different genes related to tinman in the vertebrate, which indicates that this gene has been duplicated during evolution. One of the murine homologs of tinman is the cardiac homeobox gene Csx or Nkx2.5. Gene targeting of Csx/Nkx2.5 showed that this gene is required for completion of the looping morphogenesis of the heart. However, it is not essential for the specification of the heart cell lineage. Early cardiac development might therefore be regulated by other genes, which may act either independently or in concert with Csx/Nkx2.5. Possible candidates might be other members of the NK2 class of homeobox proteins like Tix/Nkx2.6, Nkx2.3, nkx2.7, or cNkx2.8. Murine Tix/Nkx2.6 mRNA has been detected in the heart and pharyngeal endoderm (this study). Xenopus XNkx2.3 and chicken cNkx2.3 are expressed in the heart as well as in pharyngeal and gut endoderm. In contrast, murine Nkx2.3 is expressed in the gut and pharyngeal arches but not the heart. In zebrafish and chicken, two new NK-2 class homeoproteins, nkx2.7 and cNkx2.8, have been identified. Zebrafish nkx2.7 is expressed in both, the heart and pharyngeal endoderm. In the chicken, cNkx2.8 is expressed in the heart primordia and the primitive heart tube and becomes undetectable after looping. No murine homologs of nkx2.7 or cNkx2.8 have been found so far. The overlapping expression pattern of NK2 class homeobox genes in the heart and the pharynx may suggest a common origin of these two organs. In the Drosophila genome, the tinman gene is linked to another NK family gene named bagpipe. A murine homolog of bagpipe, Bax/Nkx3.1, is expressed in somites, blood vessels, and the male reproductive system during embryogenesis (this study), suggesting that this gene's function may be relevant for the development of these organs. A bagpipe homolog in Xenopus, Xbap, is expressed in the gut masculature and a region of the facial cartilage during development. In this paper, we discuss molecular mechanisms of cardiovascular development with particular emphasis on roles of transcription factors.
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Affiliation(s)
- M Tanaka
- Beth Israel Deaconess Medical Center, Department of Medicine, Harvard Medical School, Boston, Massachusetts, USA
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49
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Affiliation(s)
- N Tanaka
- Department of Internal Medicine, Suwa Red Cross Hospital, Nagano, Japan
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50
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Gang DR, Kasahara H, Xia ZQ, Vander Mijnsbrugge K, Bauw G, Boerjan W, Van Montagu M, Davin LB, Lewis NG. Evolution of plant defense mechanisms. Relationships of phenylcoumaran benzylic ether reductases to pinoresinol-lariciresinol and isoflavone reductases. J Biol Chem 1999; 274:7516-27. [PMID: 10066819 DOI: 10.1074/jbc.274.11.7516] [Citation(s) in RCA: 156] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Pinoresinol-lariciresinol and isoflavone reductase classes are phylogenetically related, as is a third, the so-called "isoflavone reductase homologs." This study establishes the first known catalytic function for the latter, as being able to engender the NADPH-dependent reduction of phenylcoumaran benzylic ethers. Accordingly, all three reductase classes are involved in the biosynthesis of important and related phenylpropanoid-derived plant defense compounds. In this investigation, the phenylcoumaran benzylic ether reductase from the gymnosperm, Pinus taeda, was cloned, with the recombinant protein heterologously expressed in Escherichia coli. The purified enzyme reduces the benzylic ether functionalities of both dehydrodiconiferyl alcohol and dihydrodehydrodiconiferyl alcohol, with a higher affinity for the former, as measured by apparent Km and Vmax values and observed kinetic 3H-isotope effects. It abstracts the 4R-hydride of the required NADPH cofactor in a manner analogous to that of the pinoresinol-lariciresinol reductases and isoflavone reductases. A similar catalytic function was observed for the corresponding recombinant reductase whose gene was cloned from the angiosperm, Populus trichocarpa. Interestingly, both pinoresinol-lariciresinol reductases and isoflavone reductases catalyze enantiospecific conversions, whereas the phenylcoumaran benzylic ether reductase only shows regiospecific discrimination. A possible evolutionary relationship among the three reductase classes is proposed, based on the supposition that phenylcoumaran benzylic ether reductases represent the progenitors of pinoresinol-lariciresinol and isoflavone reductases.
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Affiliation(s)
- D R Gang
- Institute of Biological Chemistry, Washington State University, Pullman, Washington 99164-6340, USA
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