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Tachibana T, Hoshi D, Nagashima Y. Erratum: Molecular Ion Desorption from LiF(110) Surfaces by Positron Annihilation [Phys. Rev. Lett. 131, 143201 (2023)]. Phys Rev Lett 2024; 132:079901. [PMID: 38427902 DOI: 10.1103/physrevlett.132.079901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Indexed: 03/03/2024]
Abstract
This corrects the article DOI: 10.1103/PhysRevLett.131.143201.
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Nagashima Y, Inokuchi M, Sato Y, Hasegawa T. Underweight in young Japanese women over time: a longitudinal retrospective study of the change in body mass index from ages 6 to 20 years. Ann Hum Biol 2024; 51:2345393. [PMID: 38685666 DOI: 10.1080/03014460.2024.2345393] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 04/15/2024] [Indexed: 05/02/2024]
Abstract
BACKGROUND The high prevalence of underweight in young women has become a serious health problem in Japan. When and how young women reach a low body mass index (BMI) has not been clarified. AIM To clarify the characteristics of BMI standard deviation scores (BMI SDS) trajectory of young Japanese women with underweight. SUBJECTS AND METHODS A total of 601 Japanese female university students aged 20 years were classified into underweight and healthy weight groups. Their school health check-up data were available from the ages of 6 to 20 years. We evaluated the estimated mean values of BMI SDS at each age and differences in BMI SDS (ΔBMI SDS) from 6 years to each age using a mixed-effects model and compared between the two groups at each age. RESULTS In the underweight group, the BMI SDS at every age (-1.67 to -0.91) and the ΔBMI SDS after 16 years of age (-0.76 to -0.38) were significantly lower than those in the healthy weight group (-0.41 to -0.13, -0.07 to 0.04), respectively. CONCLUSION Young Japanese women with underweight have at least two characteristics of BMI SDS trajectory: being constitutionally underweight and shifting their weight status from baseline towards underweight in their late teens.
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Affiliation(s)
- Yuka Nagashima
- Health Center, Keio University, Kanagawa, Japan
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
| | - Mikako Inokuchi
- Health Center, Keio University, Kanagawa, Japan
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
| | - Yasunori Sato
- Department of Preventive Medicine and Public Health, Keio University School of Medicine, Tokyo, Japan
| | - Tomonobu Hasegawa
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
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Ozaki A, Matsuda A, Maemura Y, Tada Y, Kasai T, Nagashima Y, Onaga C, Hara Y, Kitabatake K, Tsukimoto M, Tamori S, Sasaki K, Ohno S, Akimoto K. Luminal B Breast Cancer Coexpressing p62 and ALDH1A3 Is Less Susceptible to Radiotherapy. Anticancer Res 2024; 44:37-47. [PMID: 38160009 DOI: 10.21873/anticanres.16786] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 11/21/2023] [Accepted: 11/22/2023] [Indexed: 01/03/2024]
Abstract
BACKGROUND/AIM We have reported that p62 (also known as sequestosome 1) is needed for survival/proliferation and tumor formation by aldehyde dehydrogenase 1 (ALDH1) -positive cancer stem cells (CSCs) and that p62high ALDH1A3high expression is associated with a poor prognosis in luminal B breast cancer. However, the association between p62high ALDH1A3high and the benefit from radiotherapy in patients with luminal B breast cancer remains unclear. MATERIALS AND METHODS Datasets from the Molecular Taxonomy of Breast Cancer International Consortium (METABRIC) and The Cancer Genome Atlas (TCGA) were downloaded, and data from p62high ALDH1A3high luminal B patients treated without or with radiotherapy were analyzed by Kaplan-Meier and multivariate Cox regression analyses. We also performed an in vitro tumor sphere formation assay after X-ray irradiation using p62-knockdown ALDH1high luminal B BT-474 cells. RESULTS p62high ALDH1A3high patients had poorer clinical outcomes than other luminal B breast cancer patients treated with radiotherapy. The combination of p62 DsiRNA KD and X-ray irradiation suppressed in vitro tumor sphere formation by ALDH1high BT-474 cells. These results suggest that p62 is involved in the reduced effect of X-ray irradiation on ALDH1-positive luminal B breast CSCs. CONCLUSION p62 and ALDH1A3 may serve as prognostic biomarkers for luminal B breast cancer patients treated with radiotherapy. Additionally, the combination of p62 inhibition and radiotherapy could be useful for targeted strategies against ALDH1-positive luminal B breast CSCs.
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Affiliation(s)
- Ayaka Ozaki
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Akari Matsuda
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Yuki Maemura
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Yuna Tada
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Takahiro Kasai
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Yuka Nagashima
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Chotaro Onaga
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Yasushi Hara
- Research Institute for Biomedical Sciences, Tokyo University of Science, Chiba, Japan
| | - Kazuki Kitabatake
- Department of Pharmacy, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Mitsutoshi Tsukimoto
- Department of Pharmacy, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Shoma Tamori
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
- Research Division of Medical Data Science, Research Institute for Science and Technology, Tokyo University of Science, Chiba, Japan
| | - Kazunori Sasaki
- Laboratory of Cancer Biology, Institute for Diseases of Old Age, Juntendo University School of Medicine, Tokyo, Japan
| | - Shigeo Ohno
- Laboratory of Cancer Biology, Institute for Diseases of Old Age, Juntendo University School of Medicine, Tokyo, Japan
| | - Kazunori Akimoto
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan;
- Research Division of Medical Data Science, Research Institute for Science and Technology, Tokyo University of Science, Chiba, Japan
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Tachibana T, Hoshi D, Nagashima Y. Molecular Ion Desorption from LiF(110) Surfaces by Positron Annihilation. Phys Rev Lett 2023; 131:143201. [PMID: 37862658 DOI: 10.1103/physrevlett.131.143201] [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] [Received: 05/26/2023] [Revised: 09/02/2023] [Accepted: 09/11/2023] [Indexed: 10/22/2023]
Abstract
We have studied the desorption of positive ions from a LiF(110) crystal surface using positron and electron irradiation at 500 eV to examine the interaction between positrons and ionic crystals. Only monatomic ions, such as H^{+}, Li^{+}, and F^{+}, are detected under electron irradiation. However, positron irradiation leads to the significant desorption of ionic molecules, specifically, FH^{+} and F_{2}^{+}. Molecular ion yields are more sensitive to temperature than atomic ion yields. Based on the findings, we propose a desorption model in which positronic compounds are initially produced at the surface and subsequently desorbed as molecular ions via Auger decay following positron annihilation.
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Affiliation(s)
- T Tachibana
- Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
| | - D Hoshi
- Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
| | - Y Nagashima
- Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
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Ido T, Hasegawa M, Ikezoe R, Onchi T, Hanada K, Idei H, Kuroda K, Nagashima Y. Conceptual design of a heavy ion beam probe for the QUEST spherical tokamak. Rev Sci Instrum 2022; 93:113516. [PMID: 36461548 DOI: 10.1063/5.0101770] [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] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 08/11/2022] [Indexed: 06/17/2023]
Abstract
A heavy ion beam probe (HIBP) has been designed for the QUEST spherical tokamak to measure plasma turbulence and the profiles of electric potential profiles. Using a cesium ion beam with an energy of several 10 keV, the observable region covers most of the upper half of the plasma. Although the probe beam is deflected by the poloidal magnetic field produced by plasma current and poloidal coil currents, it can be detected under plasma current up to 150 kA by modifying the trajectories with two electrostatic sweepers. According to the numerical estimation of the intensity of the detected beam, sufficient signal intensity for measuring plasma turbulence can be obtained over almost the measurable area when the electron density is up to 1 × 1019 m-3, which is larger than the cut-off density of electron cyclotron heating in QUEST. The performance of the designed HIBP is sufficient to explore the mechanisms of heat and particle transport in magnetically confined plasmas, including the influence of plasma wall interactions, which is a goal of the QUEST project.
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Affiliation(s)
- T Ido
- RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - M Hasegawa
- RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - R Ikezoe
- RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - T Onchi
- RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - K Hanada
- RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - H Idei
- RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - K Kuroda
- RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - Y Nagashima
- RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
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Nemoto N, Samejima Y, Takenaka H, Yaguchi T, Kameda Y, Shimizu T, Sahara N, Takenaka H, Nagashima Y, Anzai H. The impact of right atrium and left atrium reverse remodeling for functional regurgitation of atrioventricular valve among patients who were underwent ablation for atrial fibrillation. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1653] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Atrial fibrillation (AF) is a risk factor of Regurgitation of Atrioventricular Valve and Regurgitation of Atrioventricular Valve is improved after ablation for AF. However, Mechanism of improvement of Tricuspid regurgitation (TR) and Mitral regurgitation (MR) after ablation for AF were unclear.
Methods
The one hundred fifty-seven cases consecutive patients who were underwent ablation for persistent AF were examined in this study. These patients were performed Holter ECG and Echocardiography 6 months after ablation for persistent AF. The area of the Right Atrium (RA), Left Atrium (LA), diameter of the tricuspid valve anulus and Mitral valve annulus, were measured by echocardiography at before and 6 months after ablation for AF. The reverse remodeling index (RRI) was defined as divided post area of RA and LA by pre area of RA and LA. The Improved group was defined as one or more than regurgitation grade improvements.
Results
TR improved in 56 cases (35.7%) of 157 cases and MR improved in 25 (16.6%) cases of 157 cases. The ratio of improved TR was significantly higher than ratio of improved MR (p<0.01). The difference in tricuspid annulus diameter before and after ablation for AF was significantly longer in TR improved group than in TR non-improved group. (4.9±5.3 mm vs 1.6±5.4 mm, p<0.01). The RRI of RA in TR improved group was significantly smaller than in TR non-improved group (0.73±0.19 vs 0.89±0.26 p<0.01). The difference in mitral annulus diameter before and after ablation for AF was not significant differences between MR improved group and MR non-improved group. The RRI of LA in MR improved group was significantly smaller than in MR non-improved group (0.79±0.22 vs 0.90±0.25 p<0.01). The RRI of RA was significantly smaller than RRI of LA among patients who were able to maintain sinus rhythm after ablation for persistent AF (0.79±0.23 vs 0.85±0.24 p=0.04).
Conclusion
Reverse remodeling of RA was higher than Reverse remodeling of LA among patients who were able to maintain sinus rhythm after ablation for persistent AF and Reverse remodeling of RA and LA were important factors of improvement of TR and MR after ablation for persistent AF. These results considered to be the cause why the improvement rate of TR was higher than the Improvement rate of MR after persistent AF.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- N Nemoto
- Ota Memorial Hospital , Ota-Shi , Japan
| | | | | | - T Yaguchi
- Ota Memorial Hospital , Ota-Shi , Japan
| | - Y Kameda
- Ota Memorial Hospital , Ota-Shi , Japan
| | - T Shimizu
- Ota Memorial Hospital , Ota-Shi , Japan
| | - N Sahara
- Ota Memorial Hospital , Ota-Shi , Japan
| | | | | | - H Anzai
- Ota Memorial Hospital , Ota-Shi , Japan
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Nagashima Y, Inokuchi M, Yasui Y, Uchida K, Tokumura M, Hasegawa T. Impact of school closure due to the coronavirus disease 2019 pandemic on body mass index in Japanese children: Retrospective longitudinal study. J Paediatr Child Health 2022; 58:1841-1846. [PMID: 35841347 DOI: 10.1111/jpc.16122] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 06/29/2022] [Accepted: 06/30/2022] [Indexed: 11/27/2022]
Abstract
AIM During the coronavirus disease 2019 pandemic, the governments of many countries responded to high levels of infection with lockdowns. As a result, some children were reported to experience weight gain. The aim of the present study was to examine the impact of school closures on body mass index (BMI) in Japanese children. METHODS This was a retrospective study of students enrolled in the participating schools (6- to 11-year-old elementary school students and 12- to 14-year-old junior high school students) between 2015 and 2020. Using school health check-up data, annual changes in the BMI standard deviation score (ΔBMI-SDS) were calculated. We compared ΔBMI-SDS in 2019-2020 with the corresponding control years. RESULTS 19 565 children with complete data were included in the analysis. Median ΔBMI-SDS in 2019-2020 were 0.24-0.35 in elementary school boys, 0.10-0.13 in junior high school boys, -0.02 to 0.15 in elementary school girls and -0.14 to -0.10 in junior high school girls. In comparison with every control year, ΔBMI-SDS in 2019-2020 were significantly higher in elementary school boys (control years: -0.07 to 0.14) and junior high school boys (control years: -0.04 to 0.06), and significantly lower in junior high school girls (control years: -0.06 to 0.09). CONCLUSION BMI-SDS increased significantly in elementary and junior high school boys, but decreased significantly in junior high school girls. The pandemic appears to have had an impact on Japanese children that was different from other countries.
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Affiliation(s)
- Yuka Nagashima
- Health Center, Keio University, Yokohama-shi, Japan.,Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
| | - Mikako Inokuchi
- Health Center, Keio University, Yokohama-shi, Japan.,Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
| | - Yosuke Yasui
- Health Center, Keio University, Yokohama-shi, Japan.,Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
| | - Keiko Uchida
- Health Center, Keio University, Yokohama-shi, Japan.,Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
| | - Mitsuaki Tokumura
- Health Center, Keio University, Yokohama-shi, Japan.,Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
| | - Tomonobu Hasegawa
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
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8
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Onaga C, Tamori S, Matsuoka I, Ozaki A, Motomura H, Nagashima Y, Sato T, Sato K, Tahata K, Xiong Y, Nakano Y, Mano Y, Miyazaki S, Sasaki K, Ohno S, Akimoto K. High SLC20A1 Expression Is Associated With Poor Prognosis for Radiotherapy of Estrogen Receptor-positive Breast Cancer. Cancer Diagn Progn 2022; 2:429-442. [PMID: 35813014 PMCID: PMC9254097 DOI: 10.21873/cdp.10126] [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] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 05/25/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND/AIM Radiotherapy is one of the main treatments for estrogen receptor-positive (ER+) breast cancer. However, in some ER+ breast cancer cases, radiotherapy is insufficient to inhibit progression and there is a lack of markers to predict radiotherapy insensitivity. Solute carrier family 20 member 1 (SLC20A1) is a sodium/inorganic phosphate symporter, which has been proposed to be a viable prognostic marker for luminal A and B types of ER+ breast cancer. The present study examined the possibility of SLC20A1 as a novel biomarker for the prediction of radiotherapy efficiency. PATIENTS AND METHODS The Molecular Taxonomy of Breast Cancer International Consortium dataset was downloaded from cBioportal and the prognosis of patients with high SLC20A1 expression (SLC20A1 high ) was compared with that of patients with low SLC20A1 expression, without or with radiotherapy and tumor stages I, II, and III, using the Kaplan-Meier method and multivariate Cox regression analyses of disease-specific and relapse-free survival. RESULTS Patients in the SLC20A1 high group with radiotherapy showed poor clinical outcomes in both luminal A and luminal B breast cancers. Furthermore, in luminal A breast cancer at tumor stage I, patients in the SLC20A1 high group with radiotherapy also showed poor clinical outcomes. Therefore, these results suggest that radiotherapy is insufficient for patients in the SLC20A1 high group for both luminal A and B types, and especially for the luminal A type at tumor stage I. CONCLUSION SLC20A1 can be used as a prognostic marker for the prediction of the efficacy of radiotherapy for luminal A and luminal B breast cancers.
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Affiliation(s)
- Chotaro Onaga
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Shoma Tamori
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Izumi Matsuoka
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Ayaka Ozaki
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Hitomi Motomura
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Yuka Nagashima
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Tsugumichi Sato
- Department of Pharmacy, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Keiko Sato
- Department of Information Sciences, Faculty of Science and Technology, Tokyo University of Science, Chiba, Japan
| | - Kouji Tahata
- Department of Information Sciences, Faculty of Science and Technology, Tokyo University of Science, Chiba, Japan
| | - Yuyun Xiong
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Yoshio Nakano
- Department of Pharmacy, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Yasunari Mano
- Department of Pharmacy, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Satoru Miyazaki
- Department of Pharmacy, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Kazunori Sasaki
- Laboratory of Cancer Biology, Institute for Diseases of Old Age, Juntendo University School of Medicine, Tokyo, Japan
| | - Shigeo Ohno
- Laboratory of Cancer Biology, Institute for Diseases of Old Age, Juntendo University School of Medicine, Tokyo, Japan
| | - Kazunori Akimoto
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
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Ozaki A, Motomura H, Tamori S, Onaga C, Nagashima Y, Kotori M, Matsuda C, Matsuda A, Mochizuki N, Sato T, Hara Y, Sato K, Miyagi Y, Nagashima Y, Hanawa T, Harada Y, Xiong Y, Sasaki K, Ohno S, Akimoto K. High Expression of p62 and ALDH1A3 Is Associated With Poor Prognosis in Luminal B Breast Cancer. Anticancer Res 2022; 42:3299-3312. [PMID: 35790283 DOI: 10.21873/anticanres.15818] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 06/06/2022] [Accepted: 06/08/2022] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM p62 (also known as sequestosome 1) is involved in cancer progression, and high expression of p62 indicates poor clinical outcome in several cancer types. However, the association between p62 gene expression and cancer stem cells (CSCs) in breast cancer subtypes remains unclear. MATERIALS AND METHODS In the present study, genomic datasets of primary breast cancer (The Cancer Genome Atlas, n=593; and Molecular Taxonomy of Breast Cancer International Consortium, n=2,509) were downloaded. p62 Expression was then examined in normal and breast cancer tissues derived from the same patients. Kaplan-Meier and multivariate Cox regression analyses were employed to evaluate disease-specific survival. Next, the effect on cell viability and in vitro tumor-sphere formation of p62 knockdown using targeted small interfering RNA was assessed by using cells with high activity of aldehyde dehydrogenase 1 (ALDH1high). RESULTS Patients with normal-like, luminal A or luminal B breast cancer with p62high had poor prognosis. Furthermore, patients with p62high ALDH1A3high luminal B type also exhibited poor prognoses. Knockdown of p62 suppressed viability and tumor-sphere formation by ALDH1high cells of the luminal B-type cell lines BT-474 and MDA-MB-361. These results suggest that p62 is essential for cancerous progression of ALDH1-positive luminal B breast CSCs, and contributes to poor prognosis of luminal B breast cancer. CONCLUSION p62 is potentially a prognostic marker and therapeutic target for ALDH1-positive luminal B breast CSCs.
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Affiliation(s)
- Ayaka Ozaki
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Hitomi Motomura
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Shoma Tamori
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Chotaro Onaga
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Yuka Nagashima
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Maho Kotori
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Chika Matsuda
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Akari Matsuda
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Nanako Mochizuki
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Tsugumichi Sato
- Department of Pharmacy, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Yasushi Hara
- Research Institute for Biomedical Sciences, Tokyo University of Science, Chiba, Japan
| | - Keiko Sato
- Department of Information Sciences, Faculty of Science and Technology, Tokyo University of Science, Chiba, Japan
| | - Yohei Miyagi
- Molecular Pathology and Genetics Division, Kanagawa Cancer Center Research Institute, Kanagawa, Japan
| | - Yoji Nagashima
- Department of Surgical Pathology, Tokyo Women's Medical University, Tokyo, Japan
| | - Takehisa Hanawa
- Department of Pharmacy, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Yohsuke Harada
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Yuyun Xiong
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Kazunori Sasaki
- Laboratory of Cancer Biology, Institute for Diseases of Old Age, Juntendo University School of Medicine, Tokyo, Japan
| | - Shigeo Ohno
- Laboratory of Cancer Biology, Institute for Diseases of Old Age, Juntendo University School of Medicine, Tokyo, Japan
| | - Kazunori Akimoto
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan;
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Onaga C, Tamori S, Matsuoka I, Ozaki A, Motomura H, Nagashima Y, Sato T, Sato K, Xiong Y, Sasaki K, Ohno S, Akimoto K. High expression of SLC20A1 is less effective for endocrine therapy and predicts late recurrence in ER-positive breast cancer. PLoS One 2022; 17:e0268799. [PMID: 35605014 PMCID: PMC9126382 DOI: 10.1371/journal.pone.0268799] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 05/08/2022] [Indexed: 12/02/2022] Open
Abstract
Estrogen receptor-positive (ER+) breast cancer intrinsically confers satisfactory clinical outcomes in response to endocrine therapy. However, a significant proportion of patients with ER+ breast cancer do not respond well to this treatment. Therefore, to evaluate the effects of endocrine therapy, there is a need for identification of novel markers that can be used at the time of diagnosis for predicting clinical outcomes, especially for early-stage and late recurrence. Solute carrier family 20 member 1 (SLC20A1) is a sodium/inorganic phosphate symporter that has been proposed to be a viable prognostic marker for the luminal A and luminal B types of ER+ breast cancer. In the present study, we examined the possible association of SLC20A1 expression with tumor staging, endocrine therapy and chemotherapy in the luminal A and luminal B subtypes of breast cancer. In addition, we analyzed the relationship between SLC20A1 expression and late recurrence in patients with luminal A and luminal B breast cancer following endocrine therapy. We showed that patients with higher levels of SLC20A1 expression (SLC20A1high) exhibited poorer clinical outcomes in those with tumor stage I luminal A breast cancer. In addition, this SLC20A1high subgroup of patients exhibited less responses to endocrine therapy, specifically in those with the luminal A and luminal B subtypes of breast cancer. However, patients with SLC20A1high showed good clinical outcomes following chemotherapy. Patients tested to be in the SLC20A1high group at the time of diagnosis also showed a higher incidence of recurrence compared with those with lower expression levels of SLC20A1, at >15 years for luminal A breast cancer and at 10–15 years for luminal B breast cancer. Therefore, we conclude that SLC20A1high can be used as a prognostic biomarker for predicting the efficacy of endocrine therapy and late recurrence for ER+ breast cancer.
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Affiliation(s)
- Chotaro Onaga
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Shoma Tamori
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Izumi Matsuoka
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Ayaka Ozaki
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Hitomi Motomura
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Yuka Nagashima
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Tsugumichi Sato
- Department of Pharmacy, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Keiko Sato
- Department of Information Sciences, Faculty of Sciences and Technology, Tokyo University of Science, Chiba, Japan
| | - Yuyun Xiong
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Kazunori Sasaki
- Laboratory of Cancer Biology, Institute for Diseases of Old Age, Juntendo University School of Medicine, Tokyo, Japan
| | - Shigeo Ohno
- Laboratory of Cancer Biology, Institute for Diseases of Old Age, Juntendo University School of Medicine, Tokyo, Japan
| | - Kazunori Akimoto
- Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
- * E-mail:
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11
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Mitsutake A, Nagashima Y, Mori H, Sawamura H, Toda T. Paracentral homonymous hemianopic scotoma caused by anterior choroidal artery infarction. QJM 2021; 114:417-418. [PMID: 33576381 DOI: 10.1093/qjmed/hcab031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- A Mitsutake
- Department of Neurology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Y Nagashima
- Department of Neurology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - H Mori
- Department of Radiology, School of Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke-shi, Tochigi 329-0498, Japan
| | - H Sawamura
- Department of Ophthalmology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - T Toda
- Department of Neurology , The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
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12
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Hanada K, Yoshida N, Hasegawa M, Oya M, Oya Y, Takagi I, Hatayama A, Shikama T, Idei H, Nagashima Y, Ikezoe R, Onchi T, Kuroda K, Kawasaki S, Higashijima A, Nagata T, Shimabukuro S, Nakamura K, Murakami S, Takase Y, Gao X, Liu H, Qian J. Overview of recent progress on steady state operation of all-metal plasma facing wall device QUEST. Nuclear Materials and Energy 2021. [DOI: 10.1016/j.nme.2021.101013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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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13
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Ido T, Fujisawa A, Takemura K, Kobayashi TK, Nishimura D, Kasuya N, Fukuyama A, Moon C, Yamasaki K, Inagaki S, Nagashima Y, Yamada T. Conceptual design of heavy ion beam probes on the PLATO tokamak. Rev Sci Instrum 2021; 92:053553. [PMID: 34243249 DOI: 10.1063/5.0041814] [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] [Received: 12/25/2020] [Accepted: 05/05/2021] [Indexed: 06/13/2023]
Abstract
Heavy ion beam probe (HIBP) systems have been designed for the new tokamak, PLATO [A. Fujisawa, AIP Conf. Proc. 1993, 020011 (2018)]. The designs have been completed, and the installations are in progress. Two HIBPs are being installed in toroidal sections 180° apart to investigate long-range correlations in the toroidal direction. Each HIBP consists of an injection beamline and a detection beamline as usual. Yet, one of the HIBPs is equipped with an additional detection beamline; the measurement positions of its two detection beamlines can be placed on almost the same magnetic surface yet at poloidal angles that differ by ∼180°. The use of three detection beamlines allows us to investigate spatial asymmetry and long-range correlations in both the toroidal and poloidal directions, simultaneously. The detected beam intensity is expected to be enough for turbulence measurements in almost the entire plasma region when the electron density is up to 1 × 1019 m-3 by selecting appropriate ion species for the probe beam. Each detector has three channels 10 mm apart, allowing measurement of local structures of micro-scale turbulence. Therefore, using the HIBPs on the PLATO tokamak will enable both local and global properties of plasma turbulence to be investigated, simultaneously.
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Affiliation(s)
- T Ido
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - A Fujisawa
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - K Takemura
- Department of Applied Energy, Nagoya University, Furocho, Chikusa, Nagoya 464-8603, Japan
| | - T-K Kobayashi
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - D Nishimura
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - N Kasuya
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - A Fukuyama
- Department of Nuclear Engineering, Kyoto University, Nisikyo-ku, Kyoto 615-8540, Japan
| | - C Moon
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - K Yamasaki
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - S Inagaki
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - Y Nagashima
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - T Yamada
- Faculty of Arts and Science, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
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14
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Yoneda N, Shikama T, Hanada K, Mori S, Onchi T, Kuroda K, Hasuo M, Ejiri A, Matsuzaki K, Osawa Y, Peng Y, Kawamata Y, Sakamoto S, Idei H, Ido T, Nakamura K, Nagashima Y, Ikezoe R, Hasegawa M, Higashijima A, Nagata T, Shimabukuro S. Toroidal flow measurements of impurity ions in QUEST ECH plasmas using multiple viewing chords emission spectroscopy. Nuclear Materials and Energy 2021. [DOI: 10.1016/j.nme.2021.100905] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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15
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Kuzmin A, Kobayashi M, Hanada K, Idei H, Onchi T, Mori S, Yoneda N, Shikama T, Hasuo M, Ido T, Nagashima Y, Ikezoe R, Hasegawa M, Kuroda K, Kono K, Matsuo S, Nagata T, Shimabukuro S, Higashijima A, Niiya I, Zushi H. Investigation of radial distribution of atomic hydrogen flux to the plasma facing components in steady state discharges in QUEST tokamak. Nuclear Materials and Energy 2021. [DOI: 10.1016/j.nme.2020.100872] [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: 10/22/2022]
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16
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Kawasuso A, Wada K, Miyashita A, Maekawa M, Iwamori H, Iida S, Nagashima Y. Positronium formation at 4H SiC(0001) surfaces. J Phys Condens Matter 2020; 33:035006. [PMID: 33017809 DOI: 10.1088/1361-648x/abbe7a] [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] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 10/05/2020] [Indexed: 06/11/2023]
Abstract
Positronium formation at 4H SiC(0001) surfaces were investigated upon the removal of natural oxide layers by hydrofluoric acid etching and heat treatment at 1000 K in ultra-high vacuum. Two types of positronium were observed in the positronium time-of-flight (PsTOF) measurements irrespective of conduction type and surface polarity. One type formed the major part of the PsTOF spectrum with a maximum energy of 4.7 ± 0.3 eV. This energy exceeded the theoretical value calculated with valence electrons. The PsTOF spectrum shape was different from those of metal surfaces, suggesting that the surface state electrons or conduction electrons need to be considered as the positronium source. Another positronium appeared at 1000 K in the tail of the PsTOF spectrum with a maximum energy of 0.2-0.5 eV. This thermally-assisted athermal positronium may be formed via the surface state positrons and electrons.
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Affiliation(s)
- A Kawasuso
- National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - K Wada
- National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - A Miyashita
- National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - M Maekawa
- National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - H Iwamori
- Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - S Iida
- Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Y Nagashima
- Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
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17
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Toshio T, Morita S, Toguchi M, Ogawa Y, Yoshida K, Iizuka J, Kondo T, Fukuda H, Ishihara H, Nagashima Y, Tanabe K. Detection of a peritumoral pseudocapsule in patients with renal cell carcinoma undergoing robot-assisted partial nephrectomy, using enhanced CT. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)33082-2] [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: 10/23/2022] Open
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18
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Nagata Y, Michishio K, Iizuka T, Kikutani H, Chiari L, Tanaka F, Nagashima Y. Motion-Induced Transition of Positronium through a Static Periodic Magnetic Field in the Sub-THz Region. Phys Rev Lett 2020; 124:173202. [PMID: 32412271 DOI: 10.1103/physrevlett.124.173202] [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] [Received: 02/21/2020] [Accepted: 04/07/2020] [Indexed: 06/11/2023]
Abstract
Atoms moving in a static periodic field experience a time-dependent oscillating field in their own rest frame. By tuning the frequency, an atomic transition can be induced. So far, this type of transition has been demonstrated in the EUV region or at higher frequencies by crystalline fields and in the microwave region by artificial fields. Here, we present the observation of the transition of positronium (Ps) in the sub-THz region by using an energy-tunable Ps beam with a multilayered magnetic grating. This grating produces a microsized periodic field, whose amplitude corresponds to a huge energy flux of ∼100 MW cm^{-2}, resulting in the efficient magnetic dipole transition.
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Affiliation(s)
- Y Nagata
- Department of Physics, Tokyo University of Science, 162-8601 Tokyo, Japan
| | - K Michishio
- National Institute of Advanced Industrial Science and Technology (AIST), 305-8568 Ibaraki, Japan
| | - T Iizuka
- Department of Physics, Tokyo University of Science, 162-8601 Tokyo, Japan
| | - H Kikutani
- Department of Physics, Tokyo University of Science, 162-8601 Tokyo, Japan
| | - L Chiari
- Department of Applied Chemistry and Biotechnology, Chiba University, 263-8522 Chiba, Japan
| | - F Tanaka
- Department of Physics, Tokyo University of Science, 162-8601 Tokyo, Japan
| | - Y Nagashima
- Department of Physics, Tokyo University of Science, 162-8601 Tokyo, Japan
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
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19
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Yamasaki K, Fujisawa A, Nagashima Y, Moon C, Inagaki S, Yamada T. Tomography system for two-dimensional observation of fluctuation in magnetized plasma. Rev Sci Instrum 2020; 91:033502. [PMID: 32259999 DOI: 10.1063/1.5144480] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Accepted: 02/28/2020] [Indexed: 06/11/2023]
Abstract
A tomography system is developed for observing local fluctuations, pursuing higher spatial resolution, over the entire plasma of a linear cylindrical plasma. The system is equipped with totally 126 lines-of-sight that are distributed equally to six sets of light guide arrays placed around the plasma. The system has succeeded in measuring the two-dimensional structure of plasma emission and resolving coherent fluctuation structures, with spatial resolution comparable to the ion Larmor radius.
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Affiliation(s)
- K Yamasaki
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
| | - A Fujisawa
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
| | - Y Nagashima
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
| | - C Moon
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
| | - S Inagaki
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
| | - T Yamada
- Faculty of Arts and Science, Kyushu University, Fukuoka 819-0395, Japan
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20
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Idei H, Onchi T, Kariya T, Tsujimura T, Kubo S, Kobayashi S, Sakaguchi M, Imai T, Hasegawa M, Nakamura K, Mishra K, Fukuyama M, Yunoki M, Kojima S, Watanabe O, Kuroda K, Hanada K, Nagashima Y, Ejiri A, Matsumoto N, Ono M, Higashijima A, Nagata T, Shimabukoro S, Takase Y, Fukuyama A, Murakami S. 28-GHz ECHCD system with beam focusing launcher on the QUEST spherical tokamak. Fusion Engineering and Design 2019. [DOI: 10.1016/j.fusengdes.2019.02.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Nakamura K, Alam M, Jiang Y, Mitarai O, Takechi M, Hasegawa M, Tokunaga K, Hanada K, Idei H, Nagashima Y, Onchi T, Kuroda K, Watanabe O, Higashijima A, Nagata T, Shimabukuro S, Kawasaki S, Fukuyama A. Plasma equilibrium based on EC-driven current profile with toroidal rotation on QUEST. Fusion Engineering and Design 2019. [DOI: 10.1016/j.fusengdes.2019.04.059] [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: 11/16/2022]
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22
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Onchi T, Idei H, Nakamura K, Nagata T, Kawasaki S, Ashida R, Fukuyama M, Hasegawa M, Ikezoe R, Higashijima A, Kuroda K, Nagashima Y, Hanada K. High voltage electrical system of 8.56 GHz CW klystron for electron cyclotron heating on QUEST spherical tokamak. Fusion Engineering and Design 2019. [DOI: 10.1016/j.fusengdes.2019.04.043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Nozaka A, Nishiwaki A, Nagashima Y, Endo S, Kuroki M, Nakajima M, Narukawa M, Kamisuki S, Arazoe T, Taguchi H, Sugawara F, Kamakura T. Chloramphenicol inhibits eukaryotic Ser/Thr phosphatase and infection-specific cell differentiation in the rice blast fungus. Sci Rep 2019; 9:9283. [PMID: 31243315 PMCID: PMC6594944 DOI: 10.1038/s41598-019-41039-x] [Citation(s) in RCA: 4] [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: 09/28/2018] [Accepted: 02/25/2019] [Indexed: 01/23/2023] Open
Abstract
Chloramphenicol (Cm) is a broad-spectrum classic antibiotic active against prokaryotic organisms. However, Cm has severe side effects in eukaryotes of which the cause remains unknown. The plant pathogenic fungus Magnaporthe oryzae, which causes rice blast, forms an appressorium to infect the host cell via single-cell differentiation. Chloramphenicol specifically inhibits appressorium formation, which indicates that Cm has a novel molecular target (or targets) in the rice blast fungus. Application of the T7 phage display method inferred that MoDullard, a Ser/Thr-protein phosphatase, may be a target of Cm. In animals Dullard functions in cell differentiation and protein synthesis, but in fungi its role is poorly understood. In vivo and in vitro analyses showed that MoDullard is required for appressorium formation, and that Cm can bind to and inhibit MoDullard function. Given that human phosphatase CTDSP1 complemented the MoDullard function during appressorium formation by M. oryzae, CTDSP1 may be a novel molecular target of Cm in eukaryotes.
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Affiliation(s)
- Akihito Nozaka
- Tokyo University of Science, Department of Applied Biological Science, Faculty of Science and Technology, 2641, Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Ayaka Nishiwaki
- Tokyo University of Science, Department of Applied Biological Science, Faculty of Science and Technology, 2641, Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Yuka Nagashima
- Tokyo University of Science, Department of Applied Biological Science, Faculty of Science and Technology, 2641, Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Shogo Endo
- Tokyo University of Science, Department of Applied Biological Science, Faculty of Science and Technology, 2641, Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Misa Kuroki
- Tokyo University of Science, Department of Applied Biological Science, Faculty of Science and Technology, 2641, Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Masahiro Nakajima
- Tokyo University of Science, Department of Applied Biological Science, Faculty of Science and Technology, 2641, Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Megumi Narukawa
- Osaka University, Research Institute for Microbial Diseases, Department of Molecular Microbiology, 3-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Shinji Kamisuki
- Azabu University, Department of Veterinary Science, Laboratory of Basic Education, 1-17-71 Fuchinobe, Chuo-ku, Sagamihara-shi, Kanagawa, 252-5201, Japan
| | - Takayuki Arazoe
- Tokyo University of Science, Department of Applied Biological Science, Faculty of Science and Technology, 2641, Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Hayao Taguchi
- Tokyo University of Science, Department of Applied Biological Science, Faculty of Science and Technology, 2641, Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Fumio Sugawara
- Tokyo University of Science, Department of Applied Biological Science, Faculty of Science and Technology, 2641, Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Takashi Kamakura
- Tokyo University of Science, Department of Applied Biological Science, Faculty of Science and Technology, 2641, Yamazaki, Noda, Chiba, 278-8510, Japan.
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24
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Jibiki N, Hirano A, Ochi T, Sakamoto A, Horiuchi K, Noguchi E, Omi Y, Ogura K, Inoue H, Kamio T, Naritaka Y, Fujibayashi M, Hiroshima K, Nagashima Y, Sakai S, Karasawa K, Okamoto T. Abstract OT2-02-01: A confirmation study of omitting axillary dissection in patients with breast cancer and positive sentinel nodes. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-ot2-02-01] [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] [Indexed: 11/16/2022]
Abstract
Abstract
Background
The omission of axillary dissection for positive sentinel-node breast cancer is considered the standard treatment for patients who undergo breast conserving surgery and radiation therapy, according to the results of ACOSOG-Z0011 and AMAROS trials. On the other hand, some surgeons still think that the surgical stress of axillary dissection is minimal, and dissection is permitted. Furthermore, Z0011 contains several problems, such as insufficient number of entry cases and lack of radiation field unity. Thus, we planned a prospective trial to confirm the safety of omitting axillary dissection in patients with breast cancer and positive sentinel nodes.
Trial design
This is a single arm, confirmation study of three medical centers. Prior to surgery, informed consent is obtained, and patients are registered primarily. After surgery, patients with 1 to 2 positive sentinel nodes, for whom axillary dissection was omitted, are finally included in this trial at final registration.
Eligibility criteria
Patients with histologically-diagnosed breast cancer, Tis–2, N0 based on a core needle biopsy, will be included in this trial. Eligible patients must be between 20 and 80 years of age, with a performance status of 0–2 and adequate organ function. They must not have undergone any prior operation, radiation therapy, chemotherapy, endocrine therapy, or immunotherapy.
Specific aims
The primary endpoint is 5-year (y) axillary recurrence rate. Secondary endpoints are 5-y overall survival, 5-y recurrence-free survival, 5-y local recurrence-free survival, the rate of upper-limb lymphedema, quality of life, and comparison of axillary recurrence rates between patients with two or more dissected nodes and those with only one positive node.
Statistical methods
The expected rate of axillary recurrence is 2.0%, and non-inferiority is defined as an axillary recurrence lesser than or equal to 5% in the axillary radiotherapy group. The sample size was calculated with a study power of 80% and type I error of 10% (two-sided). The required number of patients is estimated to be 189.
Present and target accrual
Patient accrual from the three medical centers was initiated in July 2016. We plan to enroll a total of 189 patients at final registration in this trial.
Citation Format: Jibiki N, Hirano A, Ochi T, Sakamoto A, Horiuchi K, Noguchi E, Omi Y, Ogura K, Inoue H, Kamio T, Naritaka Y, Fujibayashi M, Hiroshima K, Nagashima Y, Sakai S, Karasawa K, Okamoto T. A confirmation study of omitting axillary dissection in patients with breast cancer and positive sentinel nodes [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr OT2-02-01.
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Affiliation(s)
- N Jibiki
- Tokyo Women's Medical University Yachiyo Medical Center, Yachiyo, Japan; Tokyo Women's Medical University Medical Center East, Tokyo, Japan; Tokyo Women's Medical University Hospital, Tokyo, Japan
| | - A Hirano
- Tokyo Women's Medical University Yachiyo Medical Center, Yachiyo, Japan; Tokyo Women's Medical University Medical Center East, Tokyo, Japan; Tokyo Women's Medical University Hospital, Tokyo, Japan
| | - T Ochi
- Tokyo Women's Medical University Yachiyo Medical Center, Yachiyo, Japan; Tokyo Women's Medical University Medical Center East, Tokyo, Japan; Tokyo Women's Medical University Hospital, Tokyo, Japan
| | - A Sakamoto
- Tokyo Women's Medical University Yachiyo Medical Center, Yachiyo, Japan; Tokyo Women's Medical University Medical Center East, Tokyo, Japan; Tokyo Women's Medical University Hospital, Tokyo, Japan
| | - K Horiuchi
- Tokyo Women's Medical University Yachiyo Medical Center, Yachiyo, Japan; Tokyo Women's Medical University Medical Center East, Tokyo, Japan; Tokyo Women's Medical University Hospital, Tokyo, Japan
| | - E Noguchi
- Tokyo Women's Medical University Yachiyo Medical Center, Yachiyo, Japan; Tokyo Women's Medical University Medical Center East, Tokyo, Japan; Tokyo Women's Medical University Hospital, Tokyo, Japan
| | - Y Omi
- Tokyo Women's Medical University Yachiyo Medical Center, Yachiyo, Japan; Tokyo Women's Medical University Medical Center East, Tokyo, Japan; Tokyo Women's Medical University Hospital, Tokyo, Japan
| | - K Ogura
- Tokyo Women's Medical University Yachiyo Medical Center, Yachiyo, Japan; Tokyo Women's Medical University Medical Center East, Tokyo, Japan; Tokyo Women's Medical University Hospital, Tokyo, Japan
| | - H Inoue
- Tokyo Women's Medical University Yachiyo Medical Center, Yachiyo, Japan; Tokyo Women's Medical University Medical Center East, Tokyo, Japan; Tokyo Women's Medical University Hospital, Tokyo, Japan
| | - T Kamio
- Tokyo Women's Medical University Yachiyo Medical Center, Yachiyo, Japan; Tokyo Women's Medical University Medical Center East, Tokyo, Japan; Tokyo Women's Medical University Hospital, Tokyo, Japan
| | - Y Naritaka
- Tokyo Women's Medical University Yachiyo Medical Center, Yachiyo, Japan; Tokyo Women's Medical University Medical Center East, Tokyo, Japan; Tokyo Women's Medical University Hospital, Tokyo, Japan
| | - M Fujibayashi
- Tokyo Women's Medical University Yachiyo Medical Center, Yachiyo, Japan; Tokyo Women's Medical University Medical Center East, Tokyo, Japan; Tokyo Women's Medical University Hospital, Tokyo, Japan
| | - K Hiroshima
- Tokyo Women's Medical University Yachiyo Medical Center, Yachiyo, Japan; Tokyo Women's Medical University Medical Center East, Tokyo, Japan; Tokyo Women's Medical University Hospital, Tokyo, Japan
| | - Y Nagashima
- Tokyo Women's Medical University Yachiyo Medical Center, Yachiyo, Japan; Tokyo Women's Medical University Medical Center East, Tokyo, Japan; Tokyo Women's Medical University Hospital, Tokyo, Japan
| | - S Sakai
- Tokyo Women's Medical University Yachiyo Medical Center, Yachiyo, Japan; Tokyo Women's Medical University Medical Center East, Tokyo, Japan; Tokyo Women's Medical University Hospital, Tokyo, Japan
| | - K Karasawa
- Tokyo Women's Medical University Yachiyo Medical Center, Yachiyo, Japan; Tokyo Women's Medical University Medical Center East, Tokyo, Japan; Tokyo Women's Medical University Hospital, Tokyo, Japan
| | - T Okamoto
- Tokyo Women's Medical University Yachiyo Medical Center, Yachiyo, Japan; Tokyo Women's Medical University Medical Center East, Tokyo, Japan; Tokyo Women's Medical University Hospital, Tokyo, Japan
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25
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Michishio K, Chiari L, Tanaka F, Oshima N, Nagashima Y. A high-quality and energy-tunable positronium beam system employing a trap-based positron beam. Rev Sci Instrum 2019; 90:023305. [PMID: 30831693 DOI: 10.1063/1.5060619] [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] [Received: 09/20/2018] [Accepted: 01/17/2019] [Indexed: 06/09/2023]
Abstract
We constructed a new apparatus, built upon a trap-based slow positron beam, for the production of a collimated, energy-tunable positronium beam under ultra-high vacuum conditions employing the photodetachment of positronium negative ions. A slow positron generator consisting of a 22Na radioisotope (20 mCi) combined with a buffer-gas positron trap is employed to generate high-quality, nano-second positron bursts with a repetition rate of 1 Hz-1 kHz. The positron bursts are focused onto an efficient positron-to-positronium negative ion converter, a Na-coated W thin film in a transmission geometry, using a magnetic lens system. The ions emitted from the opposite surface of the film are electrostatically accelerated to a given energy and photodetached by a pulsed infrared laser to form a mono-energetic positronium beam with kinetic energies of 0.2 keV-3.3 keV. The achieved detection rate of Ps atoms is 23 cps at the energy of 3.3 keV with a signal-to-background ratio as high as 300. The energy spread of the beam was evaluated by comparing the result of the time-of-flight measurements and particle-tracking simulations. With the use of a collimator of 1 mm diameter, a coherent beam with an angular divergence of less than 0.3° is obtained. The obtained Ps beam, having a much higher quality than those reported hitherto, will open up a new field of experimental investigations, such as Ps interacting with a variety of materials and fundamental studies on Ps spectroscopy.
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Affiliation(s)
- K Michishio
- Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
| | - L Chiari
- Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
| | - F Tanaka
- Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
| | - N Oshima
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
| | - Y Nagashima
- Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
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Kobayashi T, Sasaki M, Ido T, Kamiya K, Miura Y, Nagashima Y, Ida K, Inagaki S, Fujisawa A, Itoh SI, Itoh K. Quantification of Turbulent Driving Forces for the Geodesic Acoustic Mode in the JFT-2M Tokamak. Phys Rev Lett 2018; 120:045002. [PMID: 29437414 DOI: 10.1103/physrevlett.120.045002] [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] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 11/29/2017] [Indexed: 06/08/2023]
Abstract
We investigate spatial structures of turbulence and turbulent transport modulated by the geodesic acoustic mode (GAM), from which the excitation mechanism of the GAM is discussed. The GAM is found to be predominantly excited through a localized Reynolds stress force, rather than the dynamic shearing force. The evaluated growth rate is larger than the linear damping coefficients and is on the same order of magnitude as the effective growth rate evaluated from time evolution in the GAM kinetic energy.
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Affiliation(s)
- T Kobayashi
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan
| | - M Sasaki
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
- Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
| | - T Ido
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan
| | - K Kamiya
- National Institutes for Quantum and Radiological Science and Technology, Naka 311-0193, Japan
| | - Y Miura
- Japan Atomic Energy Agency, Naka 311-0193, Japan
| | - Y Nagashima
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
- Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
| | - K Ida
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan
- Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
| | - S Inagaki
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
- Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
| | - A Fujisawa
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
- Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
| | - S-I Itoh
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
- Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
| | - K Itoh
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan
- Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
- Institute of Science and Technology Research, Chubu University, Kasugai 487-8501, Japan
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27
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von Schaewen A, Jeong IS, Rips S, Fukudome A, Tolley J, Nagashima Y, Fischer K, Kaulfuerst-Soboll H, Koiwa H. Improved recombinant protein production in Arabidopsis thaliana. Plant Signal Behav 2018; 13:e1486149. [PMID: 29932798 PMCID: PMC6110358 DOI: 10.1080/15592324.2018.1486149] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
UNLABELLED Production and isolation of recombinant proteins are key steps in modern Molecular Biology. Expression vectors and platforms for various hosts, including both prokaryotic and eukaryotic systems, have been used. In basic plant research, Arabidopsis thaliana is the central model for which a wealth of genetic and genomic resources is available, and enormous knowledge has been accumulated over the past years - especially since elucidation of its genome in 2000. However, until recently an Arabidopsis platform had been lacking for preparative-scale production of homologous recombinant proteins. We recently established an Arabidopsis-based super-expression system, and used it for a structural pilot study of a multi-subunit integral membrane protein complex. This review summarizes the benefits and further potential of the model plant system for protein productions. ABBREVIATIONS Nb, Nicotiana benthamiana; OT, oligosaccharyltransferase.
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Affiliation(s)
- A. von Schaewen
- Molekulare Physiologie der Pflanzen; Institut für Biologie & Biotechnologie der Pflanzen, Westfälische Wilhelms-Universität Münster, Münster, Germany
| | - I. S. Jeong
- Vegetable and Fruit Improvement Center; Department of Horticultural Sciences; and Molecular and Environmental Plant Science Program, Texas A&M University; College Station, Texas, USA
- Department of Biomedical Engineering College of Creative Convergence Engineering, Catholic Kwandong University, Gangneung, Gangwon-do, South Korea
| | - S. Rips
- Molekulare Physiologie der Pflanzen; Institut für Biologie & Biotechnologie der Pflanzen, Westfälische Wilhelms-Universität Münster, Münster, Germany
| | - A. Fukudome
- Vegetable and Fruit Improvement Center; Department of Horticultural Sciences; and Molecular and Environmental Plant Science Program, Texas A&M University; College Station, Texas, USA
| | - J. Tolley
- Vegetable and Fruit Improvement Center; Department of Horticultural Sciences; and Molecular and Environmental Plant Science Program, Texas A&M University; College Station, Texas, USA
| | - Y. Nagashima
- Vegetable and Fruit Improvement Center; Department of Horticultural Sciences; and Molecular and Environmental Plant Science Program, Texas A&M University; College Station, Texas, USA
| | - K. Fischer
- Molekulare Physiologie der Pflanzen; Institut für Biologie & Biotechnologie der Pflanzen, Westfälische Wilhelms-Universität Münster, Münster, Germany
| | - H. Kaulfuerst-Soboll
- Molekulare Physiologie der Pflanzen; Institut für Biologie & Biotechnologie der Pflanzen, Westfälische Wilhelms-Universität Münster, Münster, Germany
| | - H. Koiwa
- Vegetable and Fruit Improvement Center; Department of Horticultural Sciences; and Molecular and Environmental Plant Science Program, Texas A&M University; College Station, Texas, USA
- CONTACT Hisashi Koiwa
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Kobayashi T, Itoh K, Ido T, Kamiya K, Itoh SI, Miura Y, Nagashima Y, Fujisawa A, Inagaki S, Ida K. Turbulent transport reduction induced by transition on radial electric field shear and curvature through amplitude and cross-phase in torus plasma. Sci Rep 2017; 7:14971. [PMID: 29097702 PMCID: PMC5668279 DOI: 10.1038/s41598-017-14821-y] [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: 08/02/2017] [Accepted: 10/16/2017] [Indexed: 11/23/2022] Open
Abstract
Spatiotemporal evolutions of radial electric field and turbulence are measured simultaneously in the H-mode transition, which is a prototypical example of turbulence structure formation in high-temperature plasmas. In the dynamical phase where transport barrier is established abruptly, the time-space-frequency-resolved turbulent particle flux is obtained. Here we report the validation of the mechanism of transport barrier formation quantitatively. It is found that the particle flux is suppressed predominantly by reducing density fluctuation amplitude and cross phase between density fluctuation and potential fluctuation. Both radial electric field shear and curvature are responsible for the amplitude suppression as was predicted by theory. Turbulence amplitude reduction immediately responds to the growth of the radial electric field non-uniformity and saturates, while cross phase continuously approaches zero.
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Affiliation(s)
- T Kobayashi
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, 509-5292, Japan.
| | - K Itoh
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, 509-5292, Japan.,Institute of Science and Technology Research, Chubu University, Kasugai, 487-8501, Japan.,Research Center for Plasma Turbulence, Kyushu University, Kasuga, 816-8580, Japan
| | - T Ido
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, 509-5292, Japan
| | - K Kamiya
- National Institute for Quantum and Radiological Science and Technology, Naka, 311-0193, Japan
| | - S-I Itoh
- Research Center for Plasma Turbulence, Kyushu University, Kasuga, 816-8580, Japan.,Research Institute for Applied Mechanics, Kyushu University, Kasuga, 816-8580, Japan
| | - Y Miura
- Japan Atomic Energy Agency, Tokai, 319-1184, Japan
| | - Y Nagashima
- Research Center for Plasma Turbulence, Kyushu University, Kasuga, 816-8580, Japan.,Research Institute for Applied Mechanics, Kyushu University, Kasuga, 816-8580, Japan
| | - A Fujisawa
- Research Center for Plasma Turbulence, Kyushu University, Kasuga, 816-8580, Japan.,Research Institute for Applied Mechanics, Kyushu University, Kasuga, 816-8580, Japan
| | - S Inagaki
- Research Center for Plasma Turbulence, Kyushu University, Kasuga, 816-8580, Japan.,Research Institute for Applied Mechanics, Kyushu University, Kasuga, 816-8580, Japan
| | - K Ida
- National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, 509-5292, Japan.,Research Center for Plasma Turbulence, Kyushu University, Kasuga, 816-8580, Japan
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Nakamura K, Alam M, Jiang Y, Mitarai O, Kurihara K, Kawamata Y, Sueoka M, Takechi M, Hasegawa M, Tokunaga K, Araki K, Zushi H, Hanada K, Fujisawa A, Idei H, Nagashima Y, Kawasaki S, Nakashima H, Higashijima A, Nagata T, Fukuyama A. Plasma equilibrium based on RF-driven current profile without assuming nested magnetic surfaces on QUEST. Fusion Engineering and Design 2017. [DOI: 10.1016/j.fusengdes.2017.05.070] [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: 10/19/2022]
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30
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Tomari K, Goto M, Shimada A, Yagi H, Nagashima Y, Hasegawa Y. Five cases of childhood-onset Graves' disease treated with either surgery or radio-iodine therapy. Clin Pediatr Endocrinol 2017; 26:265-269. [PMID: 29026276 PMCID: PMC5627228 DOI: 10.1297/cpe.26.265] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 06/24/2017] [Indexed: 11/04/2022] Open
Abstract
There are three major therapeutic options for the treatment of Graves’ disease (GD):
antithyroid drugs (ATDs), thyroidectomy, and radio-iodine (RAI) therapy. ATDs are the
initial treatment option for children. However, some pediatric GD patients who are
initially treated with ATDs require other type of treatments later on. We reviewed the
medical records of childhood-onset GD cases retrospectively to report the clinical course
of patients who received either surgery or RAI therapy subsequent to treatment with ATDs.
Childhood-onset GD was successfully managed in five girls with non-ATD treatments at the
age of 7–14 yr following an unfavorable outcome of initial ATD treatment. Four cases had
surgery and one case was managed with RAI therapy. The reasons for switching to non-ATD
treatment included poor compliance, failure to maintain remission, serious adverse events
resulting from ATDs, and religious background. In conclusion, surgery and RAI therapy
could be good alternative treatment options for children with GD.
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Affiliation(s)
- Kouki Tomari
- Division of General Pediatrics, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan
| | - Masahiro Goto
- Division of General Pediatrics, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan.,Division of Endocrinology and Metabolism, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan
| | - Aya Shimada
- Division of Endocrinology and Metabolism, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan
| | - Hiroko Yagi
- Division of Endocrinology and Metabolism, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan
| | - Yuka Nagashima
- Division of Endocrinology and Metabolism, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan
| | - Yukihiro Hasegawa
- Division of General Pediatrics, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan.,Division of Endocrinology and Metabolism, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan
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31
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Kanda J, Nagashima Y, Ishiura H, Hayashi T, Shimizu J, Goto J, Kanbayashi T, Kira J, Tsuji S. DNMT1 p.Y495H mutation is frequently associated with cerebellar ataxia compared with p.Y495C mutation. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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32
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Kunimoto M, Nagashima Y, Osawa Y. The role of neurology specialists in cases of emergency calls by home care patients. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1732] [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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33
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Wang Z, Hanada K, Yoshida N, Shimoji T, Miyamoto M, Oya Y, Zushi H, Idei H, Nakamura K, Fujisawa A, Nagashima Y, Hasegawa M, Kawasaki S, Higashijima A, Nakashima H, Nagata T, Kawaguchi A, Fujiwara T, Araki K, Mitarai O, Fukuyama A, Takase Y, Matsumoto K. Measurement of thickness of film deposited on the plasma-facing wall in the QUEST tokamak by colorimetry. Rev Sci Instrum 2017; 88:093502. [PMID: 28964174 DOI: 10.1063/1.5000739] [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] [Received: 06/21/2016] [Accepted: 08/17/2017] [Indexed: 06/07/2023]
Abstract
After several experimental campaigns in the Kyushu University Experiment with Steady-state Spherical Tokamak (QUEST), the originally stainless steel plasma-facing wall (PFW) becomes completely covered with a deposited film composed of mixture materials, such as iron, chromium, carbon, and tungsten. In this work, an innovative colorimetry-based method was developed to measure the thickness of the deposited film on the actual QUEST wall. Because the optical constants of the deposited film on the PFW were position-dependent and the extinction coefficient k1 was about 1.0-2.0, which made the probing light not penetrate through some thick deposited films, the colorimetry method developed can only provide a rough value range of thickness of the metal-containing film deposited on the actual PFW in QUEST. However, the use of colorimetry is of great benefit to large-area inspections and to radioactive materials in future fusion devices that will be strictly prohibited from being taken out of the limited area.
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Affiliation(s)
- Z Wang
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - K Hanada
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - N Yoshida
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - T Shimoji
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - M Miyamoto
- Department of Material Science, Shimane University, Matsue, Shimane 690-8504, Japan
| | - Y Oya
- Faculty of Science, Shizuoka University, Ohya, Shizuoaka 422-8529, Japan
| | - H Zushi
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - H Idei
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - K Nakamura
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - A Fujisawa
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Y Nagashima
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - M Hasegawa
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - S Kawasaki
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - A Higashijima
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - H Nakashima
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - T Nagata
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - A Kawaguchi
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - T Fujiwara
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - K Araki
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - O Mitarai
- Institute of Industrial Science and Technology Research, Tokai University, Kumamoto 862-8652, Japan
| | - A Fukuyama
- Department of Nuclear Engineering, Kyoto University, Kyoto 606-8501, Japan
| | - Y Takase
- Graduate School of Frontier Sciences, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - K Matsumoto
- Honda R&D Co., Ltd. Automobile R&D Center, Haga, Tochigi 321-3393, Japan
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Yamasaki K, Fujisawa A, Nagashima Y. A proposal of Fourier-Bessel expansion with optimized ensembles of bases to analyse two dimensional image. Rev Sci Instrum 2017; 88:093507. [PMID: 28964170 DOI: 10.1063/1.5000744] [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] [Received: 05/22/2017] [Accepted: 08/17/2017] [Indexed: 06/07/2023]
Abstract
It is a critical issue to find the best set of fitting function bases in mode structural analysis of two dimensional images like plasma emission profiles. The paper proposes a method to optimize a set of the bases in the case of Fourier-Bessel function series, using their orthonormal property, for more efficient and precise analysis. The method is applied on a tomography image of plasma emission obtained with the Maximum-likelihood expectation maximization method in a linear cylindrical device. The result demonstrates the excellency of the method that realizes the smaller residual error and minimum Akaike information criterion using smaller number of fitting function bases.
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Affiliation(s)
- K Yamasaki
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - A Fujisawa
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Y Nagashima
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
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35
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Kuzmin A, Zushi H, Takagi I, Sharma S, Kobayashi M, Hirooka Y, Onchi T, Hanada K, Yoshida N, Nakamura K, Fujisawa A, Idei H, Nagashima Y, Hasegawa M, Mutoh T, Mishra K, Ohwada H. Spatial distribution of atomic and ion hydrogen flux and its effect on hydrogen recycling in long duration confined and non-confined plasmas. Nuclear Materials and Energy 2017. [DOI: 10.1016/j.nme.2017.03.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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36
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Sahara N, Nishihara S, Amemiya K, Nagashima Y, Nemoto NS, Anzai H, Nakamura M. P1513Long-term follow-up of ventricular lead performance in right ventricular sepal pacing and right ventricular apex pacing. Europace 2017. [DOI: 10.1093/ehjci/eux158.139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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37
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Shimada A, Takagi M, Nagashima Y, Miyai K, Hasegawa Y. A Novel Mutation in OTX2 Causes Combined Pituitary Hormone Deficiency, Bilateral Microphthalmia, and Agenesis of the Left Internal Carotid Artery. Horm Res Paediatr 2017; 86:62-9. [PMID: 27299576 DOI: 10.1159/000446280] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 04/15/2016] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Mutations in OTX2 cause hypopituitarism, ranging from isolated growth hormone deficiency to combined pituitary hormone deficiency (CPHD), which are commonly detected in association with severe eye abnormalities, including anophthalmia or microphthalmia. Pituitary phenotypes of OTX2 mutation carriers are highly variable; however, ACTH deficiency during the neonatal period is not common in previous reports. OBJECTIVE We report a novel missense OTX2 (R89P) mutation in a CPHD patient with severe hypoglycemia in the neonatal period due to ACTH deficiency, bilateral microphthalmia, and agenesis of the left internal carotid artery (ICA). RESULTS We identified a novel heterozygous mutation in OTX2 (c.266G>C, p.R89P). R89P OTX2 showed markedly reduced transcriptional activity of HESX1 and POU1F1 reporters compared with wild-type OTX2. A dominant negative effect was noted only in the transcription analysis with POU1F1 promoter. Electrophoretic mobility shift assay experiments showed that R89P OTX2 abrogated DNA-binding ability. CONCLUSION OTX2 mutations can cause ACTH deficiency in the neonatal period. Our study also shows that OTX2 mutations are associated with agenesis of the ICA. To the best of our knowledge, this is the first report of a transcription factor gene mutation, which was identified due to agenesis of the ICA of a patient with CPHD. This study extends our understanding of the phenotypic features, molecular mechanism, and developmental course associated with mutations in OTX2.
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38
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Kasai S, Kamiya K, Shinohara K, Kawashima H, Ogawa H, Uehara K, Miura Y, Okano F, Suzuki S, Hoshino K, Tsuzuki K, Sato M, Oasa K, Kusama Y, Yamauchi T, Nagashima Y, Ida K, Hidekuma S, Ido T, Hamada Y, Nishizawa A, Kawasumi Y, Uesugi Y, Okajima S, Kawahata K, Ejiri A, Amemiya H, Sadamoto Y. Plasma Diagnostics in JFT-2M. Fusion Science and Technology 2017. [DOI: 10.13182/fst06-a1097] [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)
- S. Kasai
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-shi, Ibaraki-ken 311-0193, Japan
| | - K. Kamiya
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-shi, Ibaraki-ken 311-0193, Japan
| | - K. Shinohara
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-shi, Ibaraki-ken 311-0193, Japan
| | - H. Kawashima
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-shi, Ibaraki-ken 311-0193, Japan
| | - H. Ogawa
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-shi, Ibaraki-ken 311-0193, Japan
| | - K. Uehara
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-shi, Ibaraki-ken 311-0193, Japan
| | - Y. Miura
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-shi, Ibaraki-ken 311-0193, Japan
| | - F. Okano
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-shi, Ibaraki-ken 311-0193, Japan
| | - S. Suzuki
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-shi, Ibaraki-ken 311-0193, Japan
| | - K. Hoshino
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-shi, Ibaraki-ken 311-0193, Japan
| | - K. Tsuzuki
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-shi, Ibaraki-ken 311-0193, Japan
| | - M. Sato
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-shi, Ibaraki-ken 311-0193, Japan
| | - K. Oasa
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-shi, Ibaraki-ken 311-0193, Japan
| | - Y. Kusama
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-shi, Ibaraki-ken 311-0193, Japan
| | - T. Yamauchi
- Japan Atomic Energy Research Institute, Kansai Research Establishment, Tokai-mura, Naka-gun Ibaraki-ken 319-1195, Japan
| | - Y. Nagashima
- Kyushu University, Research Institute for Applied Mechanics, Kasuga-shi, Fukuoka-ken 816-8580, Japan
| | - K. Ida
- National Institute for Fusion Science, Toki-shi, Gifu-ken 509-5292, Japan
| | - S. Hidekuma
- National Institute for Fusion Science, Toki-shi, Gifu-ken 509-5292, Japan
| | - T. Ido
- National Institute for Fusion Science, Toki-shi, Gifu-ken 509-5292, Japan
| | - Y. Hamada
- National Institute for Fusion Science, Toki-shi, Gifu-ken 509-5292, Japan
| | - A. Nishizawa
- National Institute for Fusion Science, Toki-shi, Gifu-ken 509-5292, Japan
| | - Y. Kawasumi
- National Institute for Fusion Science, Toki-shi, Gifu-ken 509-5292, Japan
| | - Y. Uesugi
- Kanazawa University, Kanazawa-shi, Ishikawa-ken 920-8667, Japan
| | - S. Okajima
- Chubu University, College of Engineering, Kasugai-shi, Aichi-ken 487-8501, Japan
| | - K. Kawahata
- Kanazawa University, Kanazawa-shi, Ishikawa-ken 920-8667, Japan
| | - A. Ejiri
- The University of Tokyo, Graduate School of Frontier Sciences, Kashiwa-shi, Chiba-ken 277-8561, Japan
| | - H. Amemiya
- Chuo University, The Faculty of Science and Engineering, Bunkyo-ku, Tokyo-to 112-8551, Japan
| | - Y. Sadamoto
- Joetsu University of Education, Joetsu-shi, Niigata-ken 943-8512, Japan
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39
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Ida K, Miura Y, Ido T, Nagashima Y, Shinohara K. Studies of Radial Electric Field Formation and Its Effect on Fluctuations and Transport Barriers in the JFT-2M Tokamak. Fusion Science and Technology 2017. [DOI: 10.13182/fst06-a1091] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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. Ida
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 507-5292, Japan
| | - Y. Miura
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Mukouyama 801-1 Naka City, Ibaraki 311-0193, Japan
| | - T. Ido
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 507-5292, Japan
| | - Y. Nagashima
- Research Institute for Applied Mechanics, Kyushu University, Japan
| | - K. Shinohara
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Mukouyama 801-1 Naka City, Ibaraki 311-0193, Japan
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40
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Tsuzuki K, Kimura H, Kusama Y, Sato M, Kawashima H, Kamiya K, Shinohara K, Ogawa H, Uehara K, Kurita G, Kasai S, Hoshino K, Isei N, Miura Y, Yamamoto M, Kikuchi K, Shibata T, Bakhtiari M, Hino T, Hirohata Y, Yamauchi Y, Yamaguchi K, Tsutsui H, Shimada R, Amemiya H, Nagashima Y, Ido T, Hamada Y. Characteristics of Plasma Operation with the Ferritic inside Wall and Its Compatibility with High-Performance Plasmas in JFT-2M. Fusion Science and Technology 2017. [DOI: 10.13182/fst06-a1095] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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. Tsuzuki
- Japan Atomic Energy Research Institute Naka Fusion Research Establishment, Naka-shi, Inaraki 319-0193, Japan
| | - H. Kimura
- Japan Atomic Energy Research Institute Naka Fusion Research Establishment, Naka-shi, Inaraki 319-0193, Japan
| | - Y. Kusama
- Japan Atomic Energy Research Institute Naka Fusion Research Establishment, Naka-shi, Inaraki 319-0193, Japan
| | - M. Sato
- Japan Atomic Energy Research Institute Naka Fusion Research Establishment, Naka-shi, Inaraki 319-0193, Japan
| | - H. Kawashima
- Japan Atomic Energy Research Institute Naka Fusion Research Establishment, Naka-shi, Inaraki 319-0193, Japan
| | - K. Kamiya
- Japan Atomic Energy Research Institute Naka Fusion Research Establishment, Naka-shi, Inaraki 319-0193, Japan
| | - K. Shinohara
- Japan Atomic Energy Research Institute Naka Fusion Research Establishment, Naka-shi, Inaraki 319-0193, Japan
| | - H. Ogawa
- Japan Atomic Energy Research Institute Naka Fusion Research Establishment, Naka-shi, Inaraki 319-0193, Japan
| | - K. Uehara
- Japan Atomic Energy Research Institute Naka Fusion Research Establishment, Naka-shi, Inaraki 319-0193, Japan
| | - G. Kurita
- Japan Atomic Energy Research Institute Naka Fusion Research Establishment, Naka-shi, Inaraki 319-0193, Japan
| | - S. Kasai
- Japan Atomic Energy Research Institute Naka Fusion Research Establishment, Naka-shi, Inaraki 319-0193, Japan
| | - K. Hoshino
- Japan Atomic Energy Research Institute Naka Fusion Research Establishment, Naka-shi, Inaraki 319-0193, Japan
| | - N. Isei
- Japan Atomic Energy Research Institute Naka Fusion Research Establishment, Naka-shi, Inaraki 319-0193, Japan
| | - Y. Miura
- Japan Atomic Energy Research Institute Naka Fusion Research Establishment, Naka-shi, Inaraki 319-0193, Japan
| | - M. Yamamoto
- Japan Atomic Energy Research Institute Naka Fusion Research Establishment, Naka-shi, Inaraki 319-0193, Japan
| | - K. Kikuchi
- Japan Atomic Energy Research Institute Naka Fusion Research Establishment, Naka-shi, Inaraki 319-0193, Japan
| | - T. Shibata
- Japan Atomic Energy Research Institute Naka Fusion Research Establishment, Naka-shi, Inaraki 319-0193, Japan
| | - M. Bakhtiari
- University of Wisconsin, Madison, Wisconsin 53706
| | - T. Hino
- Hokkaido University Sapporo, Hokkaido 060-8628, Japan
| | - Y. Hirohata
- Hokkaido University Sapporo, Hokkaido 060-8628, Japan
| | - Y. Yamauchi
- Hokkaido University Sapporo, Hokkaido 060-8628, Japan
| | - K. Yamaguchi
- Hokkaido University Sapporo, Hokkaido 060-8628, Japan
| | - H. Tsutsui
- Tokyo Institute of Technology, Meguro-ku Tokyo 152-8550, Japan
| | - R. Shimada
- Tokyo Institute of Technology, Meguro-ku Tokyo 152-8550, Japan
| | - H. Amemiya
- The Institute of Physical and Chemical Research, Wako, Saitama 351-0198, Japan
| | - Y. Nagashima
- National Institute for Fusion Science, Toki-shi 509-5292, Japan
| | - T. Ido
- National Institute for Fusion Science, Toki-shi 509-5292, Japan
| | - Y. Hamada
- National Institute for Fusion Science, Toki-shi 509-5292, Japan
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41
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Iida S, Wada K, Mochizuki I, Tachibana T, Yamashita T, Hyodo T, Nagashima Y. Emission of low-energy positronium from alkali-metal coated single-crystal tungsten surfaces. J Phys Condens Matter 2016; 28:475002. [PMID: 27662111 DOI: 10.1088/0953-8984/28/47/475002] [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: 06/06/2023]
Abstract
We have measured the time-of-flight of ortho-positronium emitted from Cs-, Na- and Li-coated single-crystal tungsten surfaces. The data obtained after the coating show a new positronium energy component with a specific energy loss in addition to the component whose emission energy is simply determined by the positron and the electron work functions. We suggest that this new component is attributed to the formation of positronium accompanied by inter-band transition and/or surface plasmon excitation at the surfaces.
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Affiliation(s)
- S Iida
- Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo, 162-8601, Japan
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42
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Takagi M, Miyoshi T, Nagashima Y, Shibata N, Yagi H, Fukuzawa R, Hasegawa T. Novel heterozygous mutation in the extracellular domain of FGFR1 associated with Hartsfield syndrome. Hum Genome Var 2016; 3:16034. [PMID: 27790375 PMCID: PMC5061861 DOI: 10.1038/hgv.2016.34] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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: 05/25/2016] [Revised: 07/30/2016] [Accepted: 08/08/2016] [Indexed: 11/12/2022] Open
Abstract
Heterozygous kinase domain mutations or homozygous extracellular domain mutations in FGFR1 have been reported to cause Hartsfield syndrome (HS), which is characterized by the triad of holoprosencephaly, ectrodactyly and cleft lip/palate. To date, more than 200 mutations in FGFR1 have been described; however, only 10 HS-associated mutations have been reported thus far. We describe a case of typical HS with hypogonadotropic hypogonadism (HH) harboring a novel heterozygous mutation, p.His253Pro, in the extracellular domain of FGFR1. This is the first report of an HS-associated heterozygous mutation located in the extracellular domain of FGFR1, thus expanding our understanding of the phenotypic features and further developmental course associated with FGFR1 mutations.
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Affiliation(s)
- Masaki Takagi
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan; Department of Pathology and Laboratory Medicine, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan
| | - Tatsuya Miyoshi
- Department of Endocrinology and Metabolism, Shikoku Medical Center for Children and Adults , Kagawa, Japan
| | - Yuka Nagashima
- Department of Endocrinology and Metabolism, Tokyo Metropolitan Children's Medical Center , Tokyo, Japan
| | - Nao Shibata
- Department of Endocrinology and Metabolism, Tokyo Metropolitan Children's Medical Center , Tokyo, Japan
| | - Hiroko Yagi
- Department of Endocrinology and Metabolism, Tokyo Metropolitan Children's Medical Center , Tokyo, Japan
| | - Ryuji Fukuzawa
- Department of Pathology and Laboratory Medicine, Tokyo Metropolitan Children's Medical Center , Tokyo, Japan
| | - Tomonobu Hasegawa
- Department of Pediatrics, Keio University School of Medicine , Tokyo, Japan
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43
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Takagi M, Shinohara H, Nagashima Y, Hasegawa Y, Narumi S, Hasegawa T. A novel dominant negative mutation in the intracellular domain of GHR is associated with growth hormone insensitivity. Clin Endocrinol (Oxf) 2016; 85:669-71. [PMID: 27234692 DOI: 10.1111/cen.13116] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Masaki Takagi
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
- Department of Endocrinology and Metabolism, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan
| | - Hiroyuki Shinohara
- Department of Endocrinology and Metabolism, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan
| | - Yuka Nagashima
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
- Department of Endocrinology and Metabolism, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan
| | - Yukihiro Hasegawa
- Department of Endocrinology and Metabolism, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan
| | - Satoshi Narumi
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
| | - Tomonobu Hasegawa
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan.
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44
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Zhao KJ, Nagashima Y, Diamond PH, Dong JQ, Itoh K, Itoh SI, Yan LW, Cheng J, Fujisawa A, Inagaki S, Kosuga Y, Sasaki M, Wang ZX, Wei L, Huang ZH, Yu DL, Hong WY, Li Q, Ji XQ, Song XM, Huang Y, Liu Y, Yang QW, Ding XT, Duan XR. Synchronization of Geodesic Acoustic Modes and Magnetic Fluctuations in Toroidal Plasmas. Phys Rev Lett 2016; 117:145002. [PMID: 27740841 DOI: 10.1103/physrevlett.117.145002] [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] [Received: 03/10/2016] [Indexed: 06/06/2023]
Abstract
The synchronization of geodesic acoustic modes (GAMs) and magnetic fluctuations is identified in the edge plasmas of the HL-2A tokamak. Mesoscale electric fluctuations (MSEFs) having components of a dominant GAM, and m/n=6/2 potential fluctuations are found at the same frequency as that of the magnetic fluctuations of m/n=6/2 (m and n are poloidal and toroidal mode numbers, respectively). The temporal evolutions of the MSEFs and the magnetic fluctuations clearly show the frequency entrainment and the phase lock between the GAM and the m/n=6/2 magnetic fluctuations. The results indicate that GAMs and magnetic fluctuations can transfer energy through nonlinear synchronization. Such nonlinear synchronization may also contribute to low-frequency zonal flow formation, reduction of turbulence level, and thus confinement regime transitions.
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Affiliation(s)
- K J Zhao
- Southwestern Institute of Physics, P.O. Box 432, Chendu 610041, China
| | - Y Nagashima
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Kasuga koen 6-1, 816-8580, Japan
| | - P H Diamond
- Center for Momentum Transport and Flow Organization, University of California at San Diego, California, San Diego 92093, USA
| | - J Q Dong
- Southwestern Institute of Physics, P.O. Box 432, Chendu 610041, China
- Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 310027, China
| | - K Itoh
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S-I Itoh
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Kasuga koen 6-1, 816-8580, Japan
| | - L W Yan
- Southwestern Institute of Physics, P.O. Box 432, Chendu 610041, China
| | - J Cheng
- Southwestern Institute of Physics, P.O. Box 432, Chendu 610041, China
| | - A Fujisawa
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Kasuga koen 6-1, 816-8580, Japan
| | - S Inagaki
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Kasuga koen 6-1, 816-8580, Japan
| | - Y Kosuga
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Kasuga koen 6-1, 816-8580, Japan
| | - M Sasaki
- Research Institute for Applied Mechanics, Kyushu University, Kasuga, Kasuga koen 6-1, 816-8580, Japan
| | - Z X Wang
- School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China
| | - L Wei
- School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China
| | - Z H Huang
- Southwestern Institute of Physics, P.O. Box 432, Chendu 610041, China
| | - D L Yu
- Southwestern Institute of Physics, P.O. Box 432, Chendu 610041, China
| | - W Y Hong
- Southwestern Institute of Physics, P.O. Box 432, Chendu 610041, China
| | - Q Li
- Southwestern Institute of Physics, P.O. Box 432, Chendu 610041, China
| | - X Q Ji
- Southwestern Institute of Physics, P.O. Box 432, Chendu 610041, China
| | - X M Song
- Southwestern Institute of Physics, P.O. Box 432, Chendu 610041, China
| | - Y Huang
- Southwestern Institute of Physics, P.O. Box 432, Chendu 610041, China
| | - Yi Liu
- Southwestern Institute of Physics, P.O. Box 432, Chendu 610041, China
| | - Q W Yang
- Southwestern Institute of Physics, P.O. Box 432, Chendu 610041, China
| | - X T Ding
- Southwestern Institute of Physics, P.O. Box 432, Chendu 610041, China
| | - X R Duan
- Southwestern Institute of Physics, P.O. Box 432, Chendu 610041, China
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45
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Arai N, Kawachi R, Matsuwaki R, Tachibana K, Karita S, Tanaka R, Nagashima Y, Takei H, Kondo H. P-272A RARE POST-LOBECTOMY COMPLICATION OF RIGHT-TO-LEFT SHUNT VIA FORAMEN OVALE. Interact Cardiovasc Thorac Surg 2016. [DOI: 10.1093/icvts/ivw260.269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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46
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Kobayashi T, Itoh K, Ido T, Kamiya K, Itoh SI, Miura Y, Nagashima Y, Fujisawa A, Inagaki S, Ida K, Hoshino K. Experimental Identification of Electric Field Excitation Mechanisms in a Structural Transition of Tokamak Plasmas. Sci Rep 2016; 6:30720. [PMID: 27489128 PMCID: PMC4973265 DOI: 10.1038/srep30720] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [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: 12/02/2015] [Accepted: 07/06/2016] [Indexed: 11/09/2022] Open
Abstract
Self-regulation between structure and turbulence, which is a fundamental process in the complex system, has been widely regarded as one of the central issues in modern physics. A typical example of that in magnetically confined plasmas is the Low confinement mode to High confinement mode (L-H) transition, which is intensely studied for more than thirty years since it provides a confinement improvement necessary for the realization of the fusion reactor. An essential issue in the L-H transition physics is the mechanism of the abrupt "radial" electric field generation in toroidal plasmas. To date, several models for the L-H transition have been proposed but the systematic experimental validation is still challenging. Here we report the systematic and quantitative model validations of the radial electric field excitation mechanism for the first time, using a data set of the turbulence and the radial electric field having a high spatiotemporal resolution. Examining time derivative of Poisson's equation, the sum of the loss-cone loss current and the neoclassical bulk viscosity current is found to behave as the experimentally observed radial current that excites the radial electric field within a few factors of magnitude.
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Affiliation(s)
- T. Kobayashi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Itoh
- National Institute for Fusion Science, Toki 509-5292, Japan
- Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
| | - T. Ido
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Kamiya
- National Institutes for Quantum and Radiological Science and Technology, Naka 311-0193, Japan
| | - S.-I. Itoh
- Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
| | - Y. Miura
- Japan Atomic Energy Agency, Tokai 319-1184, Japan
| | - Y. Nagashima
- Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
| | - A. Fujisawa
- Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
| | - S. Inagaki
- Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
| | - K. Ida
- National Institute for Fusion Science, Toki 509-5292, Japan
- Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
| | - K. Hoshino
- National Institutes for Quantum and Radiological Science and Technology, Naka 311-0193, Japan
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47
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Furui H, Ejiri A, Nagashima Y, Takase Y, Sonehara M, Tsujii N, Yamaguchi T, Shinya T, Togashi H, Homma H, Nakamura K, Takeuchi T, Yajima S, Yoshida Y, Toida K, Takahashi W, Yamazaki H. A model of plasma current through a hole of Rogowski probe including sheath effects. Review of Scientific Instruments 2016; 87:043503. [PMID: 27131670 DOI: 10.1063/1.4944941] [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: 06/05/2023]
Abstract
In TST-2 Ohmic discharges, local current is measured using a Rogowski probe by changing the angle between the local magnetic field and the direction of the hole of the Rogowski probe. The angular dependence shows a peak when the direction of the hole is almost parallel to the local magnetic field. The obtained width of the peak was broader than that of the theoretical curve expected from the probe geometry. In order to explain this disagreement, we consider the effect of sheath in the vicinity of the Rogowski probe. A sheath model was constructed and electron orbits were numerically calculated. From the calculation, it was found that the electron orbit is affected by E × B drift due to the sheath electric field. Such orbit causes the broadening of the peak in the angular dependence and the dependence agrees with the experimental results. The dependence of the broadening on various plasma parameters was studied numerically and explained qualitatively by a simplified analytical model.
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Affiliation(s)
- H Furui
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - A Ejiri
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | | | - Y Takase
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - M Sonehara
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - N Tsujii
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - T Yamaguchi
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - T Shinya
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - H Togashi
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - H Homma
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - K Nakamura
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - T Takeuchi
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - S Yajima
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - Y Yoshida
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - K Toida
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - W Takahashi
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - H Yamazaki
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
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48
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Inagaki S, Kobayashi T, Kosuga Y, Itoh SI, Mitsuzono T, Nagashima Y, Arakawa H, Yamada T, Miwa Y, Kasuya N, Sasaki M, Lesur M, Fujisawa A, Itoh K. A Concept of Cross-Ferroic Plasma Turbulence. Sci Rep 2016; 6:22189. [PMID: 26917218 PMCID: PMC4768185 DOI: 10.1038/srep22189] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 02/08/2016] [Indexed: 11/18/2022] Open
Abstract
The variety of scalar and vector fields in laboratory and nature plasmas is formed by plasma turbulence. Drift-wave fluctuations, driven by density gradients in magnetized plasmas, are known to relax the density gradient while they can generate flows. On the other hand, the sheared flow in the direction of magnetic fields causes Kelvin-Helmholtz type instabilities, which mix particle and momentum. These different types of fluctuations coexist in laboratory and nature, so that the multiple mechanisms for structural formation exist in extremely non-equilibrium plasmas. Here we report the discovery of a new order in plasma turbulence, in which chained structure formation is realized by cross-interaction between inhomogeneities of scalar and vector fields. The concept of cross-ferroic turbulence is developed, and the causal relation in the multiple mechanisms behind structural formation is identified, by measuring the relaxation rate and dissipation power caused by the complex turbulence-driven flux.
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Affiliation(s)
- S Inagaki
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-Koen, Kasuga-city, Fukuoka 816-8580, Japan.,Research Center for Plasma Turbulence, Kyushu University, 6-1 Kasuga-Koen, Kasuga-city, Fukuoka 816-8580 Japan
| | - T Kobayashi
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, Gifu 509-5292, Japan
| | - Y Kosuga
- Institute for Advanced Study, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, 812-8581, Fukuoka Japan
| | - S-I Itoh
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-Koen, Kasuga-city, Fukuoka 816-8580, Japan.,Research Center for Plasma Turbulence, Kyushu University, 6-1 Kasuga-Koen, Kasuga-city, Fukuoka 816-8580 Japan
| | - T Mitsuzono
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga-city, Fukuoka 816-8580, Japan
| | - Y Nagashima
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-Koen, Kasuga-city, Fukuoka 816-8580, Japan.,Research Center for Plasma Turbulence, Kyushu University, 6-1 Kasuga-Koen, Kasuga-city, Fukuoka 816-8580 Japan
| | - H Arakawa
- Teikyo University, 6-22 Misaki-machi, Omuta-city, Fukuoka 836-8505, Japan
| | - T Yamada
- Faculty of Arts and Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Y Miwa
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga-city, Fukuoka 816-8580, Japan
| | - N Kasuya
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-Koen, Kasuga-city, Fukuoka 816-8580, Japan.,Research Center for Plasma Turbulence, Kyushu University, 6-1 Kasuga-Koen, Kasuga-city, Fukuoka 816-8580 Japan
| | - M Sasaki
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-Koen, Kasuga-city, Fukuoka 816-8580, Japan.,Research Center for Plasma Turbulence, Kyushu University, 6-1 Kasuga-Koen, Kasuga-city, Fukuoka 816-8580 Japan
| | - M Lesur
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-Koen, Kasuga-city, Fukuoka 816-8580, Japan
| | - A Fujisawa
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-Koen, Kasuga-city, Fukuoka 816-8580, Japan.,Research Center for Plasma Turbulence, Kyushu University, 6-1 Kasuga-Koen, Kasuga-city, Fukuoka 816-8580 Japan
| | - K Itoh
- Research Center for Plasma Turbulence, Kyushu University, 6-1 Kasuga-Koen, Kasuga-city, Fukuoka 816-8580 Japan.,National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, Gifu 509-5292, Japan
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49
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Yokozawa T, Asano R, Nakamura T, Furuya M, Nagashima Y, Koyama-Sato M, Kanda Y, Hirahara F, Sakakibara H. Steroid cell tumour, not otherwise specified: Rare case with primary amenorrhoea in a 16-year-old. J OBSTET GYNAECOL 2015. [PMID: 26214349 DOI: 10.3109/01443615.2015.1022141] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- T Yokozawa
- a Department of Obstetrics and Gynecology , Yokohama City University School of Medicine , Yokohama , Japan
| | - R Asano
- a Department of Obstetrics and Gynecology , Yokohama City University School of Medicine , Yokohama , Japan
| | - T Nakamura
- a Department of Obstetrics and Gynecology , Yokohama City University School of Medicine , Yokohama , Japan
| | - M Furuya
- b Department of Pathology , Yokohama City University School of Medicine , Yokohama , Japan
| | - Y Nagashima
- b Department of Pathology , Yokohama City University School of Medicine , Yokohama , Japan.,c Department of Surgical Pathology , Tokyo Women's Medical University Hospital , Tokyo , Japan
| | - M Koyama-Sato
- a Department of Obstetrics and Gynecology , Yokohama City University School of Medicine , Yokohama , Japan
| | - Y Kanda
- a Department of Obstetrics and Gynecology , Yokohama City University School of Medicine , Yokohama , Japan
| | - F Hirahara
- a Department of Obstetrics and Gynecology , Yokohama City University School of Medicine , Yokohama , Japan
| | - H Sakakibara
- a Department of Obstetrics and Gynecology , Yokohama City University School of Medicine , Yokohama , Japan
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50
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Banerjee S, Zushi H, Nishino N, Mishra K, Onchi T, Kuzmin A, Nagashima Y, Hanada K, Nakamura K, Idei H, Hasegawa M, Fujisawa A. Dynamical programming based turbulence velocimetry for fast visible imaging of tokamak plasma. Rev Sci Instrum 2015; 86:033505. [PMID: 25832227 DOI: 10.1063/1.4914838] [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: 06/04/2023]
Abstract
An orthogonal dynamic programming (ODP) based particle image velocimetry (PIV) technique is developed to measure the time resolved flow field of the fluctuating structures at the plasma edge and scrape off layer (SOL) of tokamaks. This non-intrusive technique can provide two dimensional velocity fields at high spatial and temporal resolution from a fast framing image sequence and hence can provide better insights into plasma flow as compared to conventional probe measurements. Applicability of the technique is tested with simulated image pairs. Finally, it is applied to tangential fast visible images of QUEST plasma to estimate the SOL flow in inboard poloidal null-natural divertor configuration. This technique is also applied to investigate the intricate features of the core of the run-away dominated phase following the injection of a large amount of neutrals in the target Ohmic plasma. Development of the ODP-PIV code and its applicability on actual plasma images is reported.
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Affiliation(s)
- Santanu Banerjee
- Institute for Plasma Research, Bhat, Gandhinagar 382428, Gujarat, India
| | - H Zushi
- RIAM, Kyushu University, 6-1 Kasuga Koen, Kasuga-shi, Fukuoka 816-8580, Japan
| | - N Nishino
- Mechanical System Engineering, Hiroshima University, Hiroshima 739-8527, Japan
| | - K Mishra
- IGSES, Kyushu University, 6-1 Kasuga Koen, Kasuga-shi, Fukuoka 816-8580, Japan
| | - T Onchi
- RIAM, Kyushu University, 6-1 Kasuga Koen, Kasuga-shi, Fukuoka 816-8580, Japan
| | - A Kuzmin
- RIAM, Kyushu University, 6-1 Kasuga Koen, Kasuga-shi, Fukuoka 816-8580, Japan
| | - Y Nagashima
- RIAM, Kyushu University, 6-1 Kasuga Koen, Kasuga-shi, Fukuoka 816-8580, Japan
| | - K Hanada
- RIAM, Kyushu University, 6-1 Kasuga Koen, Kasuga-shi, Fukuoka 816-8580, Japan
| | - K Nakamura
- RIAM, Kyushu University, 6-1 Kasuga Koen, Kasuga-shi, Fukuoka 816-8580, Japan
| | - H Idei
- RIAM, Kyushu University, 6-1 Kasuga Koen, Kasuga-shi, Fukuoka 816-8580, Japan
| | - M Hasegawa
- RIAM, Kyushu University, 6-1 Kasuga Koen, Kasuga-shi, Fukuoka 816-8580, Japan
| | - A Fujisawa
- RIAM, Kyushu University, 6-1 Kasuga Koen, Kasuga-shi, Fukuoka 816-8580, Japan
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