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Shimoyama M, Kawamoto S, Nakatani Y, Banba N, Nagashima Y, Tomoe T, Sugiyama T, Ueno A, Kitahara K, Kawabe A, Otani N, Sugimura H, Yasu T. Effects of salt intake reduction by urinary sodium to potassium ratio self-monitoring method. Hypertens Res 2024:10.1038/s41440-024-01655-1. [PMID: 38600280 DOI: 10.1038/s41440-024-01655-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 02/24/2024] [Accepted: 03/01/2024] [Indexed: 04/12/2024]
Abstract
Effective and feasible educational methods are needed to control salt intake. We performed a single-center, non-randomized controlled study to investigate the effectiveness and feasibility of self-monitoring using a urinary sodium/potassium (Na/K) ratio-measuring device in patients with difficulty in reducing salt intake. This study included 160 patients with hypertension, chronic kidney disease, or heart disease who were followed up in the outpatient clinic of the Dokkyo Medical University Nikko Medical Center. Urinary Na/K ratio measuring Na/K ratio meter were loaned for 2-6 weeks to the treatment (T) group (n = 80) and not to the patients in the control (C) group (n = 80). In the T group, patients were instructed to measure the urinary Na/K ratio at least three times a day and maintain a Na/K ratio below 2.0. Salt reduction education and home blood pressure measurement guidance continued in both groups. The mean device loan period in the T group was 25.1 days, the mean number of measurements was 3.0 times/day, and the proportion of patients achieving three measurements per day was 48.8% (39/80). Self-monitoring using the urinary Na/K ratio meter successfully reduced salt intake by -1.9 g/day at the second visit (p < 0.001) in the T group. In contrast, no change was observed over time in the C group. Self-monitoring using the urinary Na/K ratio meter successfully reduced salt intake in patients with difficulty reducing salt intake.
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Affiliation(s)
- Masahiro Shimoyama
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, 145-1 Moritomo, Nikko, Tochigi, 321 -1298, Japan
| | - Shinya Kawamoto
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, 145-1 Moritomo, Nikko, Tochigi, 321 -1298, Japan.
| | - Yuki Nakatani
- Department of Diabetes and Endocrinology, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Nobuyuki Banba
- Department of Diabetes and Endocrinology, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Yasuko Nagashima
- Department of Diabetes and Endocrinology, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Takashi Tomoe
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, 145-1 Moritomo, Nikko, Tochigi, 321 -1298, Japan
| | - Takushi Sugiyama
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, 145-1 Moritomo, Nikko, Tochigi, 321 -1298, Japan
| | - Asuka Ueno
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, 145-1 Moritomo, Nikko, Tochigi, 321 -1298, Japan
| | - Keijiro Kitahara
- Department of Cardiology, Dokkyo Medical University, Nikko Medical Center, Nikko, Tochigi, Japan
| | - Atsuhiko Kawabe
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, 145-1 Moritomo, Nikko, Tochigi, 321 -1298, Japan
| | - Naoyuki Otani
- Department of Cardiology, Dokkyo Medical University, Nikko Medical Center, Nikko, Tochigi, Japan
| | - Hiroyuki Sugimura
- Department of Cardiology, Dokkyo Medical University, Nikko Medical Center, Nikko, Tochigi, Japan
| | - Takanori Yasu
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, 145-1 Moritomo, Nikko, Tochigi, 321 -1298, Japan
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2
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Tsukamoto Y, Natsumeda M, Takahashi H, Ueno A, Sakai K, Shida K, Seto H, Saito T, Shibuma S, Nakayama Y, Tanaka Y, Nakano T, Ohta A, Maruyama K, Okada M, Eda T, Seki Y, Yoneoka Y, Shimizu H, Okamoto K, Kakita A, Oishi M. Clinical, imaging, and molecular features of radiation-induced glioblastomas developing more than 20 years after radiation therapy for intracranial germinomatous germ cell tumor: illustrative cases. J Neurosurg Case Lessons 2023; 6:CASE23361. [PMID: 37870755 PMCID: PMC10584087 DOI: 10.3171/case23361] [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: 07/15/2023] [Accepted: 09/18/2023] [Indexed: 10/24/2023]
Abstract
BACKGROUND Germinomatous germ cell tumor is highly sensitive to chemoradiotherapy; patients are expected to survive for decades. Many radiation-induced malignant gliomas (RIMGs) occur >10 years after radiotherapy. Standard therapy for RIMGs has not been established because of the lesion's rarity, the patient's shorter survival period, and the risk of radiation necrosis by repeat radiation. OBSERVATIONS Two patients, a 32-year-old man and a 50-year-old man, developed glioblastomas more than 20 years after radiation monotherapy for germinoma with or without mature teratoma. The first patient showed a tumor in the left frontotemporal region with disseminated lesions and died 2 months after partial resection of the tumor without responding to the chemotherapy with temozolomide and bevacizumab. Methylation classifier analysis classified the pathology as closest to diffuse pediatric-type high-grade glioma, Rtk1 subtype. The second patient showed a tumor mass in the brainstem and left cerebellar peduncle, which worsened progressively during chemotherapy with temozolomide and bevacizumab. The tumor transiently responded to stereotactic radiotherapy with the CyberKnife. However, the patient died of RIMG recurrence-related aspiration pneumonia 11 months after the biopsy. Methylation classifier analysis classified the pathology as closest to infratentorial pilocytic astrocytoma. LESSONS Chemoradiotherapy may improve the survival of patients with RIMGs. Furthermore, molecular features may influence the clinical, locoregional, and pathological features of RIMG.
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Affiliation(s)
| | - Manabu Natsumeda
- Departments of Neurosurgery and
- Advanced Treatment of Neurological Diseases Branch, Brain Research Institute, Niigata University, Niigata, Japan
| | - Haruhiko Takahashi
- Departments of Neurosurgery and
- Pathology, Brain Research Institute, Niigata University, Niigata, Japan
| | | | | | | | | | | | | | | | - Yuki Tanaka
- Pathology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Toshimichi Nakano
- Department of Radiology and Radiation Oncology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Atsushi Ohta
- Department of Radiology and Radiation Oncology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Katsuya Maruyama
- Department of Radiology, Niigata Neurosurgery Hospital, Niigata, Japan
| | | | - Takeyoshi Eda
- Division of Pharmacy, Medical and Dental Hospital, Niigata University, Niigata, Japan; and
| | - Yasuhiro Seki
- Department of Neurosurgery, Uonuma Kikan Hospital, Uonuma Institute of Community Medicine, Medical and Dental Hospital, Niigata University, Niigata, Japan
| | - Yuichirou Yoneoka
- Department of Neurosurgery, Uonuma Kikan Hospital, Uonuma Institute of Community Medicine, Medical and Dental Hospital, Niigata University, Niigata, Japan
| | - Hiroshi Shimizu
- Pathology, Brain Research Institute, Niigata University, Niigata, Japan
| | | | - Akiyoshi Kakita
- Pathology, Brain Research Institute, Niigata University, Niigata, Japan
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Abe K, Kitago M, Matsuda S, Shinoda M, Yagi H, Abe Y, Oshima G, Hori S, Endo Y, Yokose T, Miura E, Kubota N, Ueno A, Masugi Y, Ojima H, Sakamoto M, Kitagawa Y. Epstein-Barr virus-associated inflammatory pseudotumor variant of follicular dendritic cell sarcoma of the liver: a case report and review of the literature. Surg Case Rep 2022; 8:220. [PMID: 36484868 PMCID: PMC9733763 DOI: 10.1186/s40792-022-01572-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Accepted: 11/22/2022] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Follicular dendritic cell sarcoma is a rare stromal tumor with no standard treatment. However, some reports have revealed that follicular dendritic cell sarcoma has an inflammatory pseudotumor variant associated with Epstein-Barr virus infection that has a relatively good prognosis. In this report, we present a case of a resected inflammatory pseudotumor variant of follicular dendritic cell sarcoma of the liver, and have reviewed the literature on the clinicopathological, molecular, and genomic features of this tumor. CASE PRESENTATION The inflammatory pseudotumor variant of follicular dendritic cell sarcoma originates only in the liver or spleen, causes no symptoms, and is more common in middle-aged Asian women. It has no characteristic imaging features, which partially explains why the inflammatory pseudotumor variant of follicular dendritic cell sarcoma is difficult to diagnose. Pathologically, the inflammatory pseudotumor variant of follicular dendritic cell sarcoma has spindle cells mixed with inflammatory cells and is variably positive for follicular dendritic cell markers (CD21, CD23, and CD35) and Epstein-Barr virus-encoded RNA. On genetic analysis, patients with this tumor high levels of latent membrane protein 1 gene expression and extremely low levels of host C-X-C Chemokine Receptor type 7 gene expression, indicating that the inflammatory pseudotumor variant of follicular dendritic cell sarcoma has a latent Epstein-Barr virus type 2 infection. CONCLUSIONS The inflammatory pseudotumor variant of follicular dendritic cell sarcoma is an Epstein-Barr virus-associated tumor and a favorable prognosis by surgical resection, similar to Epstein-Barr virus-associated gastric cancer.
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Affiliation(s)
- K. Abe
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - M. Kitago
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - S. Matsuda
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - M. Shinoda
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - H. Yagi
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - Y. Abe
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - G. Oshima
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - S. Hori
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - Y. Endo
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - T. Yokose
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - E. Miura
- grid.26091.3c0000 0004 1936 9959Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - N. Kubota
- grid.26091.3c0000 0004 1936 9959Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - A. Ueno
- grid.26091.3c0000 0004 1936 9959Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - Y. Masugi
- grid.26091.3c0000 0004 1936 9959Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - H. Ojima
- grid.26091.3c0000 0004 1936 9959Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - M. Sakamoto
- grid.26091.3c0000 0004 1936 9959Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - Y. Kitagawa
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
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4
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Terasaki K, Ueno A, Mizuno C, Shima T, Okanoue T. Gastrointestinal: Pembrolizumab-induced gastric ulcer occurring as an immune-related adverse event. J Gastroenterol Hepatol 2022; 37:1472. [PMID: 35141946 DOI: 10.1111/jgh.15788] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 01/04/2022] [Accepted: 01/12/2022] [Indexed: 12/09/2022]
Affiliation(s)
- K Terasaki
- Department of Gastroenterology and Hepatology, Saiseikai Suita Hospital, Osaka, Japan
| | - A Ueno
- Department of Urology, Saiseikai Suita Hospital, Osaka, Japan
| | - C Mizuno
- Department of Gastroenterology and Hepatology, Saiseikai Suita Hospital, Osaka, Japan
| | - T Shima
- Department of Gastroenterology and Hepatology, Saiseikai Suita Hospital, Osaka, Japan
| | - T Okanoue
- Department of Gastroenterology and Hepatology, Saiseikai Suita Hospital, Osaka, Japan
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Uema A, Tamura Y, Uejima T, Hoshiai M, Ueno A, Nagao M, Tomoe T, Ono S, Maeno E, Mizuguchi S, Kawabe A, Sugiyama T, Yasu T. Early diastolic mitral regurgitation in left ventricular aneurysm. Heart Vessels 2021; 37:683-690. [PMID: 34689257 DOI: 10.1007/s00380-021-01958-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 10/01/2021] [Indexed: 11/29/2022]
Abstract
Diastolic mitral regurgitation is a type of functional mitral regurgitation that develops via a reversal of the left atrioventricular pressure gradient during diastole. This study aimed to explore the mechanism underlying early diastolic mitral regurgitation (EDMR) in patients with left ventricular (LV) aneurysms after anterior myocardial infarction (AMI) by assessing the intraventricular pressure difference using vector flow mapping. We enrolled 23 consecutive patients with LV aneurysms (with and without EDMR) and 15 healthy men as controls. In the control group, LV suction began from the apex during early diastole. In contrast, the blood that pooled in the apical aneurysm during systole generated a relatively higher pressure at the apex than at the basal LV during early diastole; consequently, the pressure reversal phenomenon occurred in the LV. Compared to the EDMR- group, the EDMR + group (n = 7) exhibited a significantly higher diastolic time ratio ([time from the second heart sound to the pressure inversion point]/[total diastolic time]) (P < 0.001). The diastolic time ratio was significantly correlated with log BNP, but not with E/A, E/E', or the left atrial expansion index. In conclusion, EDMR in LV aneurysm may be due to a prolonged diastolic time ratio leading to prolonged pressure inversion in the LV during early diastole.
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Affiliation(s)
- Atsuko Uema
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, 632 Takatoku, Nikko, Tochigi, 321-2593, Japan
| | - Yuma Tamura
- Department of Rehabilitation, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Tokuhisa Uejima
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Minato-ku, Nishiazabu, Tokyo, Japan
| | - Megumi Hoshiai
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, 632 Takatoku, Nikko, Tochigi, 321-2593, Japan
| | - Asuka Ueno
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, 632 Takatoku, Nikko, Tochigi, 321-2593, Japan
| | - Moeko Nagao
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, 632 Takatoku, Nikko, Tochigi, 321-2593, Japan
| | - Takashi Tomoe
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, 632 Takatoku, Nikko, Tochigi, 321-2593, Japan
| | - Shoya Ono
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, 632 Takatoku, Nikko, Tochigi, 321-2593, Japan
| | - Eikou Maeno
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, 632 Takatoku, Nikko, Tochigi, 321-2593, Japan
| | - Satoshi Mizuguchi
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, 632 Takatoku, Nikko, Tochigi, 321-2593, Japan
| | - Atsuhiko Kawabe
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, 632 Takatoku, Nikko, Tochigi, 321-2593, Japan
| | - Takushi Sugiyama
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, 632 Takatoku, Nikko, Tochigi, 321-2593, Japan
| | - Takanori Yasu
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, 632 Takatoku, Nikko, Tochigi, 321-2593, Japan.
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6
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Hoshiai M, Ochiai K, Tamura Y, Tsurumi T, Terashima M, Tamiya H, Maeno E, Mizuguchi S, Tomoe T, Kawabe A, Uema A, Ueno A, Sugiyama T, Horie Y, Sugimura H, Koike R, Yasu T. Effects of whole-body neuromuscular electrical stimulation device on hemodynamics, arrhythmia, and sublingual microcirculation. Heart Vessels 2021; 36:844-852. [PMID: 33547929 PMCID: PMC8093154 DOI: 10.1007/s00380-020-01755-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 12/04/2020] [Indexed: 12/12/2022]
Abstract
Neuromuscular electrical stimulation has been used to treat cardiovascular diseases and other types of muscular dysfunction. A novel whole-body neuromuscular electrical stimulation (WB-NMES) wearable device may be beneficial when combined with voluntary exercises. This study aimed to investigate the safety and effects of the WB-NMES on hemodynamics, arrhythmia, and sublingual microcirculation. The study included 19 healthy Japanese volunteers, aged 22-33 years, who were not using any medication. Electrocardiogram (ECG), echocardiography, and blood sampling were conducted before a 20-min WB-NMES session and at 0 and 10 min after termination of WB-NMES. Their tolerable maximum intensity was recorded using numeric rating scale. Arrhythmia was not detected during neuromuscular electrical stimulation or during 10 min of recovery. Blood pressure, heart rate, left ventricular ejection fraction, and diastolic function remained unchanged; however, mild mitral regurgitation was transiently observed during WB-NMES in a single male participant. A decrease in blood glucose and an increase in blood lactate levels were observed, but no changes in blood fluidity, sublingual microcirculation, blood levels of noradrenaline, or oxidative stress were shown. WB-NMES is safe and effective for decreasing blood glucose and increasing blood lactate levels without changing the blood fluidity or microcirculation in healthy people.
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Affiliation(s)
- Megumi Hoshiai
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Kaori Ochiai
- Department of Rehabilitation, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Yuma Tamura
- Department of Rehabilitation, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Tomoki Tsurumi
- Department of Rehabilitation, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Masato Terashima
- Department of Rehabilitation, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Hajime Tamiya
- Department of Rehabilitation, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Eikou Maeno
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Satoshi Mizuguchi
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Takashi Tomoe
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Atsuhiko Kawabe
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Atsuko Uema
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Asuka Ueno
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Takushi Sugiyama
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Yasuto Horie
- Department of Cardiology, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Hiroyuki Sugimura
- Department of Cardiology, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Ryousuke Koike
- Department of Pulmonology, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan
| | - Takanori Yasu
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center, Nikko, Tochigi, Japan.
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7
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Tamiya H, Tamura Y, Mochi S, Akazawa Y, Mochi Y, Banba N, Nakatani Y, Hoshiai M, Ueno A, Nagao M, Tomoe T, Onozaki M, Uema A, Kawabe A, Sugiyama T, Yasu T. Extended Sedentary Time Increases the Risk of All-Cause Death and New Cardiovascular Events in Patients With Diabetic Kidney Disease. Circ J 2020; 84:2190-2197. [PMID: 33116002 DOI: 10.1253/circj.cj-20-0407] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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] [Indexed: 11/09/2022]
Abstract
BACKGROUND Sedentary behavior may be an independent risk factor for cardiovascular events. This study aimed to clarify the effects of extended sedentary time in patients with diabetic kidney disease (DKD) on the risk of all-cause death and new events.Methods and Results:A prospective cohort study was performed over 39 months. The study included 173 patients with DKD who completed the International Physical Activity Questionnaire (IPAQ) (101 men; mean age, 71±11 years); 37 patients (21.4%) were diagnosed with cardiovascular disease (CVD). New events were defined as all-cause death, cerebral stroke, or CVD requiring hospitalization or commencing hemodialysis (HD). Data were analyzed using a multivariate Cox proportional hazard regression model with variables, including sedentary time. There were 34 cases of new events during the observation period, including 4 cases of stroke, 20 cases of CVD, 4 cases of HD implementation, and 6 cases of death. Hazard ratio (HR) calculations for the new event onset group identified sedentary time as a significant independent variable. The independent variable that was identified as a significant predictor of new events was the sedentary time (60 min/day; HR: 1.23, 95% CI: 1.05-1.45, P=0.012). CONCLUSIONS Extended sedentary time increased the risk of new cardiovascular or renal events and/or all-cause death in patients with DKD.
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Affiliation(s)
- Hajime Tamiya
- Department of Rehabilitation, Dokkyo Medical University Nikko Medical Center
| | - Yuma Tamura
- Department of Rehabilitation, Dokkyo Medical University Nikko Medical Center
| | - Syusuke Mochi
- Department of Rehabilitation, Dokkyo Medical University Nikko Medical Center
| | - Yusuke Akazawa
- Department of Rehabilitation, Dokkyo Medical University Nikko Medical Center
| | - Yumi Mochi
- Department of Rehabilitation, Dokkyo Medical University Nikko Medical Center
| | - Nobuyuki Banba
- Department of Diabetes and Endocrinology, Dokkyo Medical University Nikko Medical Center
| | - Yuki Nakatani
- Department of Diabetes and Endocrinology, Dokkyo Medical University Nikko Medical Center
| | - Megumi Hoshiai
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center
| | - Asuka Ueno
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center
| | - Moeko Nagao
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center
| | - Takashi Tomoe
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center
| | - Masato Onozaki
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center
| | - Atsuko Uema
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center
| | - Atsuhiko Kawabe
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center
| | - Takushi Sugiyama
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center
| | - Takanori Yasu
- Department of Cardiovascular Medicine and Nephrology, Dokkyo Medical University Nikko Medical Center
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8
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Lu C, Dufour A, Ueno A, Jijon H, Prowse K, Novak KL, Panaccione R, Hirota SA. A13 PROTEINS AND FIBROSTENOTIC CROHN’S DISEASE; WHO SHOWED UP TO THE PARTY? J Can Assoc Gastroenterol 2019. [DOI: 10.1093/jcag/gwz006.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- C Lu
- Gastroenterology, University of Calgary, Calgary AB, AB, Canada
| | - A Dufour
- Gastroenterology, University of Calgary, Calgary AB, AB, Canada
| | - A Ueno
- Gastroenterology, University of Calgary, Calgary AB, AB, Canada
| | - H Jijon
- Gastroenterology, University of Calgary, Calgary AB, AB, Canada
| | - K Prowse
- McMaster University, Hamilton, AB, Canada
| | - K L Novak
- Gastroenterology, University of Calgary, Calgary AB, AB, Canada
| | - R Panaccione
- Gastroenterology, University of Calgary, Calgary AB, AB, Canada
| | - S A Hirota
- Physiology & Pharmacology, University of Calgary, Calgary, AB, Canada
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9
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Ueno A, Yamaguchi K, Sudo M, Imai S. Is sarcopenia associated with increased toxicity of neoadjuvant/adjuvant chemotherapy for breast cancer? Ann Oncol 2018. [DOI: 10.1093/annonc/mdy426.017] [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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10
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Murai A, Kitahara K, Terada H, Ueno A, Ohmori Y, Kobayashi M, Horio F. Ingestion of paddy rice increases intestinal mucin secretion and goblet cell number and prevents dextran sodium sulfate-induced intestinal barrier defect in chickens. Poult Sci 2018; 97:3577-3586. [PMID: 29850863 DOI: 10.3382/ps/pey202] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 04/26/2018] [Indexed: 11/20/2022] Open
Abstract
Paddy rice is a potential feed grain for chickens, whose strong gizzards can crush the hull. Here, we investigated whether paddy rice rich in hull-derived water-insoluble dietary fiber stimulates intestinal mucin secretion and production, as well as the possible involvement of paddy rice in intestinal barrier function. Layer male chicks at 7 d of age were divided into four groups according to the diet: corn, polished rice, brown rice, or paddy rice (650 g/kg diet), which they ate for 14 consecutive days. At 21 d of age, the birds were refed their experimental diets, and small intestinal mucin fractions were collected to determine intestinal mucin content. Small intestinal mucin secretion was induced most strongly in the paddy rice group (Experiment 1). The rank order of diet-induced mucin secretion was paddy rice > corn = brown rice > polished rice. Ileal MUC2 gene expression and ileal number of goblet cells were highest in the paddy rice group (Experiment 1). A study of bromodeoxy-U uptake into ileal epithelial cells indicated the increase in goblet cells in the paddy rice group was related to accelerate epithelial cell migration (Experiment 2). A single supplementation of isolated rice hulls without kernels increased MUC2 gene expression and goblet cell numbers (Experiment 3), suggesting the importance of the hull's bulk-forming capacity on mucin production. Finally, chicks fed corn or paddy rice were orally administered dextran sodium sulfate (DSS) to disrupt intestinal barrier function. In the DSS-treated birds, the intestinal permeability of fluorescein isothiocyanate dextran in the everted gut sacs was much lower in the paddy rice group than in the corn group (Experiment 4), showing that paddy rice protects against mucosal disruption. In conclusion, ingestion of paddy rice increases intestinal mucin secretion and production through enhanced MUC2 gene expression and epithelial turnover and prevents DSS-induced intestinal barrier defects in chickens.
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Affiliation(s)
- A Murai
- Laboratory of Animal Nutrition, Department of Animal Sciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - K Kitahara
- Laboratory of Animal Nutrition, Department of Animal Sciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - H Terada
- Laboratory of Animal Nutrition, Department of Animal Sciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - A Ueno
- Laboratory of Animal Nutrition, Department of Animal Sciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Y Ohmori
- Laboratory of Animal Anatomy, Department of Animal Sciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - M Kobayashi
- Laboratory of Animal Nutrition, Department of Animal Sciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - F Horio
- Laboratory of Animal Nutrition, Department of Animal Sciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
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Ino Y, Tachi T, Ueno A, Otsubo M, Katsuno H, Noguchi Y, Sakai C, Iguchi K, Kawakami C, Fujisaki K, Teramachi H. Clinic-level factors associated with collaboration with community pharmacies in Japan. Pharmazie 2018; 73:545-552. [PMID: 30223940 DOI: 10.1691/ph.2018.8542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
The aim of this study was to clarify the clinic-level factors related to experiences of and attitudes toward collaboration with community pharmacies. We conducted a postal questionnaire survey of all clinics in Gifu, Japan, assessing the experiences and attitudes of representative clinical staff regarding the following activities in collaboration with community pharmacists: regional care meetings/service adjustment meetings, case study conferences, joint workshops/continuing education conferences, community services, information sharing through medical cooperation networks, and accompanying community pharmacists during home care. The factors significantly related to experiences of joint workshops/continuing education conferences included home care visits (odds ratio [OR] 2.39) and a 100 % out-of-hospital prescription ratio (OR 4.80). In contrast, only home care visits were significantly associated with consideration of information sharing through medical cooperation networks and accompanying community pharmacists during home care (OR 2.06 and 11.91, respectively). Finally, the factors significantly associated with considering implementing case study conferences and joint workshops/continuing education conferences included home care visits (OR 4.64 and 2.98, respectively) and a 100% out-of-hospital prescription ratio (OR 4.64 and 6.38). Overall, having more opportunities to communicate with community pharmacists and other healthcare professionals appeared to facilitate clinics' consideration of collaboration with community pharmacies, along with actual experiences.
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Affiliation(s)
- K Kariya
- First Department of Internal Medicine, Hirosaki University School of Medicine, Hirosaki, Japan
| | - K Aihara
- First Department of Internal Medicine, Hirosaki University School of Medicine, Hirosaki, Japan
| | - A Ueno
- First Department of Internal Medicine, Hirosaki University School of Medicine, Hirosaki, Japan
| | - A Kimura
- The Division of Blood Transfusion, Hirosaki University School of Medicine, Hirosaki, Japan
| | - Y Yoshida
- First Department of Internal Medicine, Hirosaki University School of Medicine, Hirosaki, Japan
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13
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Ota K, Takahashi K, Agishi T, Sonda T, Oka T, Ueda S, Amemiya H, Shiramizu T, Okazaki H, Akiyama N, Hasegawa A, Kawamura T, Takagi H, Ueno A. Multicentre trial of ABO-incompatible kidney transplantation. Transpl Int 2018. [DOI: 10.1111/tri.1992.5.s1.40] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [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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14
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Mochizuki Y, Kubota T, Hata Y, Miyazaki M, Suyama Y, Enaida H, Ueno A, Ishibashi T. Surgical Results of Combined Pars Plana Vitrectomy, Phacoemulsification, and Intraocular Lens Implantation for various Vitreoretinal Diseases. Eur J Ophthalmol 2018; 16:279-86. [PMID: 16703547 DOI: 10.1177/112067210601600214] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE To evaluate the results and complications of combined pars plana vitrectomy (PPV), phacoemulsification and aspiration (PEA), and intraocular lens (IOL) implantation. METHODS A total of 117 eyes from 114 patients who had undergone PPV combined with PEA and IOL implantation were retrospectively analyzed. Combined surgery was performed for a wide variety of vitreoretinal diseases. Intraoperative and postoperative complications were also reviewed. RESULTS The postoperative BCVA improved by 2 lines or more in 85 eyes (72.6%). Intraoperative complications consisted of retinal tears in 14 eyes (12.0%) and posterior capsular rupture in 2 eyes (1.7%). Iatrogenic retinal tears occurred more frequently in eyes with a macular hole than in eyes with any other disease (p=0.005, chi-square test). Postoperative complications consisted of posterior capsule opacification (PCO) (21 eyes), transient IOP elevation (29 eyes), vitreous hemorrhage (6 eyes), anterior chamber fibrin exudation (11 eyes), posterior iris synechia (8 eyes), neovascular glaucoma (1 eye), and recurrent retinal detachment (RD) (2 eyes). Fibrin exudation occurred more frequently in eyes with proliferative diabetic retinopathy (PDR) and RD than in eyes with any other disease (p=0.03, chi-square test). PCO occurred more frequently in eyes with PDR than in eyes with any other disease (p=0.03, chi-square test). CONCLUSIONS The present study suggests that a high success rate can be achieved when recently improved PPV techniques are combined wi th PEA and IOL implantation. The complications that were observed following this combined treatment varied with respect to the vitreoretinal disease present prior to surgery.
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Affiliation(s)
- Y Mochizuki
- Department of Ophthalmology, National Nagasaki Medical Center, Nagasaki, Japan
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15
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Ueno A, Kawabe A, Sugiyama T, Ishikawa M, Uema A, Shimoyama M, Horie Y, Hoshi T, Sugimura H, Yasu T. Out-of-hospital cardiac arrest related to coronary arterial spasm in three elderly patients with no obstructive coronary artery disease. J Cardiol Cases 2017; 16:154-157. [DOI: 10.1016/j.jccase.2017.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 07/07/2017] [Accepted: 07/12/2017] [Indexed: 10/19/2022] Open
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16
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Ueno A, Yoshinaga T, Katoh N, Akagawa Y, Tazawa K, Miyazaki D, Ichinose S, Kanaya K, Horiuchi T, Sekijima Y. Clinical features and treatment outcome of patients with dural arteriovenous fistula who were referred to neurology department. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3319] [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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17
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Nomura S, Ueno A, Miyazaki D, Kishida D, Hineno A, Shimojima Y, Sekijima Y. Clinical features and treatment outcome of four patients with anti-signal recognition particle antibody positive necrotizing myopathy. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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18
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Hamano T, Hayashi K, Nagata M, Matsubara R, Ikebata Y, Ito T, Ibe A, Fujita Y, Kusaka Y, Shirafuji N, Sasaki H, Kitazaki Y, Yamaguchi T, Enomoto S, Endo Y, Ueno A, Matsunaga A, Ikawa M, Yamamura O, Nakamoto Y. Efficacy of short questionnaire for screening of early stage of dementia. Trial in Fukui prefecture, Japan. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.931] [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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19
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Hayashi K, Hamano T, Asano R, Sasaki H, Kitasaki Y, Endo Y, Enomoto S, Shirafuji N, Matsunaga A, Ueno A, Ikawa M, Yamamura O, Nakamoto Y. Reduction of serum cholinesterase by cholinesterase inhibitor (Donepezil, Galantamine, or Rivastigmine). J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.936] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Akagawa Y, Ueno A, Ikeda J, Matsushima A, Miyazaki D, Ishii W, Sekijima Y. Investigation on favorable prognostic factors in patients with non-HIV, non- natalizumab, progressive multifocal leukoencephalopathy. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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21
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Ueno A, Yamamura Y, Fujita K, Shibutou N, Yamamura M. SAT0339 The Efficacy of The 2015 Eular/acr Recommendations for The Management of Polymyalgia Rheumatica in Japanese Patients. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.5442] [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: 11/04/2022]
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22
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Yamamura Y, Fujita K, Shibutou N, Ueno A, Yamamura M. AB0834 Acute Calcium Pyrophosphate Crystal Arthritis as A Cause of Sudden Onset of Fever and Arthritis in Geriatric Patients. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.5310] [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: 11/04/2022]
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23
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Fujita K, Yamamura Y, Nomura Y, Shibutou N, Ueno A, Maruyama K, Ombe T, Hiramatsu M, Yamamura M. SAT0172 Comparison of Efficacy and Safety of Biologic Agents between Elderly-Onset and Younger-Onset Rheumatoid Arthritis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.5388] [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: 11/04/2022]
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24
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Ueno A, Ohkoshi K, Ikegami K, Takagi A, Asano H, Oguri H. Fine-tuning to minimize emittances of J-PARC RF-driven H⁻ ion source. Rev Sci Instrum 2016; 87:02B130. [PMID: 26932012 DOI: 10.1063/1.4932573] [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
The Japan Proton Accelerator Research Complex (J-PARC) cesiated RF-driven H(-) ion source has been successfully operated for about one year. By the world's brightest level beam, the J-PARC design beam power of 1 MW was successfully demonstrated. In order to minimize the transverse emittances, the rod-filter-field (RFF) was optimized by changing the triple-gap-lengths of each of pairing five piece rod-filter-magnets. The larger emittance degradation seems to be caused by impurity-gases than the RFF. The smaller beam-hole-diameter of the extraction electrode caused the more than expected improvements on not only the emittances but also the peak beam intensity.
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Affiliation(s)
- A Ueno
- J-PARC Center, Tokai-Mura, Naka-Gun, Ibaraki-Ken 319-1195, Japan
| | - K Ohkoshi
- J-PARC Center, Tokai-Mura, Naka-Gun, Ibaraki-Ken 319-1195, Japan
| | - K Ikegami
- J-PARC Center, Tokai-Mura, Naka-Gun, Ibaraki-Ken 319-1195, Japan
| | - A Takagi
- J-PARC Center, Tokai-Mura, Naka-Gun, Ibaraki-Ken 319-1195, Japan
| | - H Asano
- J-PARC Center, Tokai-Mura, Naka-Gun, Ibaraki-Ken 319-1195, Japan
| | - H Oguri
- J-PARC Center, Tokai-Mura, Naka-Gun, Ibaraki-Ken 319-1195, Japan
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25
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Ueno A, Ohkoshi K, Ikegami K, Takagi A, Asano H, Oguri H. Pre-conditioning procedure suitable for internal-RF-antenna of J-PARC RF-driven H⁻ ion source. Rev Sci Instrum 2016; 87:02B129. [PMID: 26932011 DOI: 10.1063/1.4932323] [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
The Japan Proton Accelerator Research Complex (J-PARC) cesiated RF-driven H(-) ion source has been successfully operated for about 1 yr. By the world brightest level beam, the J-PARC design beam power of 1 MW was successfully demonstrated. Although no internal-RF-antenna failure, except for the once caused by an excess cesium due to a misoperation, occurred in the operation, many antennas failed in pre-conditionings for the first hundred days. The antenna failure rate was drastically decreased by using an antenna with coating thicker than a standard value and the pre-conditioning procedure repeating 15 min 25 kW RF-power operation and impurity-gas evacuation a few times, before the full power (50 kW) operation.
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Affiliation(s)
- A Ueno
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - K Ohkoshi
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - K Ikegami
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - A Takagi
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - H Asano
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - H Oguri
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
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Shibata T, Nishida K, Mochizuki S, Mattei S, Lettry J, Hatayama A, Ueno A, Oguri H, Ohkoshi K, Ikegami K, Takagi A, Asano H, Naito F. Numerical study of plasma generation process and internal antenna heat loadings in J-PARC RF negative ion source. Rev Sci Instrum 2016; 87:02B128. [PMID: 26932010 DOI: 10.1063/1.4931787] [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
A numerical model of plasma transport and electromagnetic field in the J-PARC (Japan Proton Accelerator Research Complex) radio frequency ion source has been developed to understand the relation between antenna coil heat loadings and plasma production/transport processes. From the calculation, the local plasma density increase is observed in the region close to the antenna coil. Electrons are magnetized by the magnetic field line with absolute magnetic flux density 30-120 Gauss which leads to high local ionization rate. The results suggest that modification of magnetic configuration can be made to reduce plasma heat flux onto the antenna.
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Affiliation(s)
- T Shibata
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - K Nishida
- Keio University, Hiyoshi, Kohoku-ku, Yokohama-shi, Kanagawa-ken 223-8522, Japan
| | - S Mochizuki
- Keio University, Hiyoshi, Kohoku-ku, Yokohama-shi, Kanagawa-ken 223-8522, Japan
| | - S Mattei
- European Organization for Nuclear Research (CERN), 1211 Geneva 23, Switzerland
| | - J Lettry
- European Organization for Nuclear Research (CERN), 1211 Geneva 23, Switzerland
| | - A Hatayama
- Keio University, Hiyoshi, Kohoku-ku, Yokohama-shi, Kanagawa-ken 223-8522, Japan
| | - A Ueno
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - H Oguri
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - K Ohkoshi
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - K Ikegami
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - A Takagi
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - H Asano
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - F Naito
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
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27
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Oguri H, Ohkoshi K, Ikegami K, Takagi A, Asano H, Ueno A, Shibata T. Status of the RF-driven H⁻ ion source for J-PARC linac. Rev Sci Instrum 2016; 87:02B138. [PMID: 26932020 DOI: 10.1063/1.4935641] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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
For the upgrade of the Japan Proton Accelerator Research Complex linac beam current, a cesiated RF-driven negative hydrogen ion source was installed during the 2014 summer shutdown period, with subsequent operations commencing on September 29, 2014. The ion source has been successfully operating with a beam current and duty factor of 33 mA and 1.25% (500 μs and 25 Hz), respectively. The result of recent beam operation has demonstrated that the ion source is capable of continuous operation for approximately 1100 h. The spark rate at the beam extractor was observed to be at a frequency of less than once a day, which is an acceptable level for user operation. Although an antenna failure occurred during operation on October 26, 2014, no subsequent serious issues have occurred since then.
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Affiliation(s)
- H Oguri
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - K Ohkoshi
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - K Ikegami
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - A Takagi
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - H Asano
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - A Ueno
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - T Shibata
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
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28
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Yamamura Y, Matuura I, Nomura Y, Fujita K, Momoki N, Ueno A, Maruyama K, Hiramatu M, Yamamura M. THU0572 Heterogeneity of IGG4-Related Disease in Terms of Organ Damage, Treatment Response and Prognosis. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.6484] [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: 11/04/2022]
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29
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Fujita K, Shibuto N, Yamamura Y, Nomura Y, Momoki N, Ueno A, Nakao K, Maruyama K, Yamamura M. SAT0539 TAFRO Syndrome: A Unique Mimicker of Systemic Lupus Erythematosus. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.5875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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30
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Okimura K, Maeta K, Kobayashi N, Goto M, Kano N, Ishihara T, Ishikawa T, Tsumura H, Ueno A, Miyao Y, Sakuma S, Kinugasa F, Takahashi N, Miura T. Characterization of ASKP1240, a fully human antibody targeting human CD40 with potent immunosuppressive effects. Am J Transplant 2014; 14:1290-9. [PMID: 24731050 PMCID: PMC4225473 DOI: 10.1111/ajt.12678] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 01/14/2014] [Accepted: 01/29/2014] [Indexed: 01/25/2023]
Abstract
Blocking the CD40-CD154 interaction is reported to be effective for transplantation management and autoimmune disease models in rodents and nonhuman primates. However, clinical trials with anti-CD154 mAbs were halted because of high incidence of thromboembolic complications. Thus, we generated and characterized a fully human anti-CD40 mAb ASKP1240, as an alternative to anti-CD154 mAb. In vitro ASKP1240 concentration-dependently inhibited human peripheral blood mononuclear cell proliferation induced by soluble CD154. In addition, ASKP1240 did not destabilize platelet thrombi under physiological high shear conditions while mouse anti-human CD154 mAb (mu5C8) did. And ASKP1240 itself did not activate platelet and endothelial cells. In vivo administration of ASKP1240 (1 or 10 mg/kg, intravenously) to cynomolgus monkeys, weekly for 3 weeks, significantly attenuated both delayed-type hypersensitivity and specific antibody formation evoked by tetanus toxoid. The immunosuppressive effect was well correlated with the CD40 receptor saturation. Thus, these results suggest that ASKP1240 is immunosuppressive but not prothromboembolic, and as such appears to be a promising therapeutic candidate for the management of solid organ transplant rejection and autoimmune diseases therapy.
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Affiliation(s)
- K Okimura
- Development Research Laboratories, Kyowa Hakko Kirin Co., Ltd.Shizuoka, Japan,*Corresponding author: Kazumichi Okimura,
| | - K Maeta
- Development Research Laboratories, Kyowa Hakko Kirin Co., Ltd.Shizuoka, Japan
| | - N Kobayashi
- Development Research Laboratories, Kyowa Hakko Kirin Co., Ltd.Shizuoka, Japan
| | - M Goto
- Development Research Laboratories, Kyowa Hakko Kirin Co., Ltd.Shizuoka, Japan
| | - N Kano
- Biologics Research Laboratories, Kyowa Hakko Kirin Co., Ltd.Tokyo, Japan
| | - T Ishihara
- Bio Process Research and Development Laboratories, Kyowa Hakko Kirin Co., Ltd.Gunma, Japan
| | - T Ishikawa
- Bio Process Research and Development Laboratories, Kyowa Hakko Kirin Co., Ltd.Gunma, Japan
| | - H Tsumura
- Bio Process Research and Development Laboratories, Kyowa Hakko Kirin Co., Ltd.Gunma, Japan
| | - A Ueno
- Bio Process Research and Development Laboratories, Kyowa Hakko Kirin Co., Ltd.Gunma, Japan
| | - Y Miyao
- Drug Metabolism Research Laboratories, Astellas Pharma, Inc.Osaka, Japan
| | - S Sakuma
- Drug Safety Research Laboratories, Astellas Pharma, Inc.Osaka, Japan
| | - F Kinugasa
- Translational and Development Pharmacology—US, Astellas Pharma Global Development, Inc.Northbrook, IL
| | - N Takahashi
- Biologics Research Laboratories, Kyowa Hakko Kirin Co., Ltd.Tokyo, Japan
| | - T Miura
- Development Research Laboratories, Kyowa Hakko Kirin Co., Ltd.Shizuoka, Japan
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Ueno A, Koizumi I, Ohkoshi K, Ikegami K, Takagi A, Yamazaki S, Oguri H. Dependence of beam emittance on plasma electrode temperature and rf-power, and filter-field tuning with center-gapped rod-filter magnets in J-PARC rf-driven H(-) ion source. Rev Sci Instrum 2014; 85:02B133. [PMID: 24593573 DOI: 10.1063/1.4854195] [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: 06/03/2023]
Abstract
The prototype rf-driven H(-) ion-source with a nickel plated oxygen-free-copper (OFC) plasma chamber, which satisfies the Japan Proton Accelerator Research Complex (J-PARC) 2nd stage requirements of a H(-) ion beam current of 60 mA within normalized emittances of 1.5 π mm mrad both horizontally and vertically, a flat top beam duty factor of 1.25% (500 μs × 25 Hz) and a life-time of more than 50 days, was reported at the 3rd international symposium on negative ions, beams, and sources (NIBS2012). The experimental results of the J-PARC ion source with a plasma chamber made of stainless-steel, instead of nickel plated OFC used in the prototype source, are presented in this paper. By comparing these two sources, the following two important results were acquired. One was that the about 20% lower emittance was produced by the rather low plasma electrode (PE) temperature (TPE) of about 120 °C compared with the typically used TPE of about 200 °C to maximize the beam current for the plasma with the abundant cesium (Cs). The other was that by using the rod-filter magnets with a gap at each center and tuning the gap-lengths, the filter-field was optimized and the rf-power necessary to produce the J-PARC required H(-) ion beam current was reduced typically 18%. The lower rf-power also decreases the emittances.
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Affiliation(s)
- A Ueno
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - I Koizumi
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - K Ohkoshi
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - K Ikegami
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - A Takagi
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - S Yamazaki
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - H Oguri
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
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Yamazaki S, Ikegami K, Ohkoshi K, Ueno A, Koizumi I, Takagi A, Oguri H. Operation and development status of the J-PARC ion source. Rev Sci Instrum 2014; 85:02B136. [PMID: 24593576 DOI: 10.1063/1.4858155] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A cesium-free H(-) ion source driven with a LaB6 filament is being operated at the Japan Proton Accelerator Research Complex (J-PARC) without any serious trouble since the restoration from the March 2011 earthquake. The H(-) ion current from the ion source is routinely restricted approximately 19 mA for the lifetime of the filament. In order to increase the beam power at the linac beam operation (January to February 2013), the beam current from the ion source was increased to 22 mA. At this operation, the lifetime of the filament was estimated by the reduction in the filament current. According to the steep reduction in the filament current, the break of the filament was predicted. Although the filament has broken after approximately 10 h from the steep current reduction, the beam operation was restarted approximately 8 h later by the preparation for the exchange of new filament. At the study time for the 3 GeV rapid cycling synchrotron (April 2013), the ion source was operated at approximately 30 mA for 8 days. As a part of the beam current upgrade plan for the J-PARC, the front end test stand consisting of the ion source and the radio frequency quadrupole is under preparation. The RF-driven H(-) ion source developed for the J-PARC 2nd stage requirements will be tested at this test stand.
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Affiliation(s)
- S Yamazaki
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - K Ikegami
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - K Ohkoshi
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - A Ueno
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - I Koizumi
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - A Takagi
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - H Oguri
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
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Murata H, Miyauchi Y, Katoh T, Ueno A, Yodogawa K, Iwasaki Y, Hayashi M, Tanaka K, Simizu W, Mizuno K. Clinical and electrophysiological characteristics of electrical storm of monomorphic ventricular tachycardia refractory to intravenous amiodarone. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p1345] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kugawa F, Dalkhuren SO, Ueno A, Yamashita K. Novel morphological features in the death of MCF-7 human breast cancer cells after exposure to anticancer drugs. Pharmazie 2012; 67:862-869. [PMID: 23136722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Cell death of human breast cancer cell line MCF-7/pDsRed2-Mito, caused by independent- or multi-administration of three anticancer drugs, cyclophosphamide [CPA], doxorubicin [DXR], and 5-fluorouracil [5-FU], was studied using fluorescence and electron microscopy. In our previous study using cell viability assays, microscopic inspection of heterochromatin condensation, a DNA fragmentation assay, and flow cytometric analyses, the death of MCF-7 cells was classified into two groups. The cell death induced by CPA or 5-FU was classified as apoptotic, while the cell death induced by DXR treatment or a mixture of all three anticancer drugs was classified as non-apoptotic. Here, we examined the morphology of the whole cell and its organelles, including the mitochondria, using electron microscopy. Mitochondria are of particular interest because they are the key organelle for the molecular apoptotic-death cascade. To monitor mitochondrial morphology, we used our previously constructed MCF-7/pDsRed2-Mito line, generated by introducing the pDsRed2-Mito vector into MCF-7 cells. The mitochondria in these cells emit red fluorescence. We found that the administration of DXR alone or of all three anticancer drugs together resulted in the clumping of the red-fluorescent materials on both sides of the round dying cells, interrupted by the nucleus. Detailed electron microscopic observation revealed that the novel morphology of the dying MCF-7 cells might be owing, not to destruction of the mitochondrial membrane, but to the tight structure of the nuclear membrane. Other anticancer drugs showed different, characteristic features in electron microscopic images, which suggested that death induced by anti-cancer drugs in the human breast cancer cell line, MCF-7, may result from any of a number of diverse processes.
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Affiliation(s)
- F Kugawa
- Department of Biopharmaceutics, School of Pharmacy, Hyogo University of Health Sciences Hyogo, Japan.
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Arikawa A, Yoshida S, Yoshikawa H, Ishikawa K, Yamaji Y, Arita RI, Ueno A, Ishibashi T. Case of novel PITX2 gene mutation associated with Peters' anomaly and persistent hyperplastic primary vitreous. Eye (Lond) 2010; 24:391-3. [PMID: 19461663 DOI: 10.1038/eye.2009.114] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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Ueno A, Oguri H, Ikegami K, Namekawa Y, Ohkoshi K, Tokuchi A. An innovative high-power constant-current pulsed-arc power-supply for a high-density pulsed-arc-plasma ion-source using a LaB6-filament. Rev Sci Instrum 2010; 81:02A718. [PMID: 20192388 DOI: 10.1063/1.3271249] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
An innovative high-power constant-current (CC) pulsed-arc (PA) power-supply (PS) indispensable for a high-density PA plasma ion-source using a lanthanum hexaboride (LaB(6)) filament was devised by combining a constant-voltage (CV) PA-PS, which is composed of an insulated gate bipolar transistor (IGBT) switch, a CV direct-current (dc) PS and a 270 mF capacitor with a CC-PA-PS, which is composed of an IGBT-switch, a CC-dc-PS and a 400 microH inductor, through the inductor. The hybrid-CC-PA-PS succeeded in producing a flat arc-pulse with a peak power of 56 kW (400 A x 140 V) and a duty factor of more than 1.5% (600 micros x 25 Hz) for Japan Proton Accelerator Research Complex (J-PARC) H(-) ion-source stably. It also succeeded in shortening the 99% rising-time of the arc-pulse-current to about 20 micros and tilting up or down the arc-pulse-current arbitrarily and almost linearly by changing the setting voltage of its CV-dc-PS.
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Affiliation(s)
- A Ueno
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan.
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Ohkoshi K, Namekawa Y, Ueno A, Oguri H, Ikegami K. Development of an H- ion source for Japan Proton Accelerator Research Complex upgrade. Rev Sci Instrum 2010; 81:02A716. [PMID: 20192386 DOI: 10.1063/1.3277140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A cesium (Cs) free H(-) ion source driven with a lanthanum hexaboride (LaB(6)) filament was adopted as an ion source for the first stage of the Japan Proton Accelerator Research Complex (J-PARC). At present, the maximum H(-) ion current produced by the ion source is 38 mA, using which J-PARC can produce a proton beam power of 0.6 MW by accelerating it with the 181 MeV linac and the 3 GeV rapid cycling synchrotron. In order to satisfy the beam power of 1 MW required for the second stage of the J-PARC in the near future, we have to increase the ion current to more than 60 mA. Therefore, we have started to develop a Cs-seeded ion source by adding an external Cs-seeding system to a J-PARC test ion source that has a structure similar to that of the J-PARC ion source except for the fact that the plasma chamber is slightly larger. As a result, a H(-) ion current of more than 70 mA was obtained from the ion source using a tungsten filament instead of a LaB(6) filament with a low arc discharge power of 15 kW (100 V, 150 A).
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Affiliation(s)
- K Ohkoshi
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan.
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Oguri H, Ueno A, Ikegami K, Namekawa Y, Ohkoshi K. Recent operation status of Japan Proton Accelerator Research Complex H- ion source. Rev Sci Instrum 2010; 81:02A715. [PMID: 20192385 DOI: 10.1063/1.3266138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A cesium-free H(-) ion source driven with a LaB(6) filament is being operated at the Japan Proton Accelerator Research Complex for approximately three years without any serious trouble. In the beam commissioning or supply runs, the ion source has been operated in two different modes such as low current mode of 5 mA and high current mode of 30 mA. The total interruption time during the runs due to the ion source failure is approximately 50 h, which correspond to the ion source availability of 99%. After a long-term operation, the surface of the filament and the plasma electrode become discolored with dark partially. The result of surface analysis with field emission scanning electron microscope showed that most of the dark material is formed with boron. At the beam test performed in the interval of the run, we demonstrated that the H(-) current increased by miniaturizing the LaB(6) filament.
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Affiliation(s)
- H Oguri
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan.
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Ikegami K, Ueno A, Oguri H, Namekawa Y, Ohkoshi K. A survey of optimal filament shape in a Japan Proton Accelerator Research Complex H- ion source. Rev Sci Instrum 2010; 81:02A717. [PMID: 20192387 DOI: 10.1063/1.3277158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Dependence of various shapes of lanthanum hexaboride (LaB(6)) filaments on H(-) ion currents (I_H(-)'s) was examined by using the first Japan Proton Accelerator Research Complex (J-PARC) test ion source. It is almost the same with the J-PARC H(-) ion source (J-PARC-IS) except for the maximum arc current (290 A instead of 400 A). An I_H(-) of 35.2 mA was extracted by using a cylindrical double-spiral LaB(6) filament with a diameter of 29.5 mm and a length of 35.5 mm, which is the same one used in J-PARC-IS. It increased to 43.4 mA with a flat triple-hairpin LaB(6) filament. The I_H(-) is considered to be increased by the enlargement of the high density plasma region near the plasma electrode aperture and the reduction of the LaB(6) filament unemission area located in the high density plasma region.
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Affiliation(s)
- K Ikegami
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan.
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Ueno A, Oguri H, Ikegami K, Namekawa Y, Ohkoshi K. Interesting experimental results in Japan Proton Accelerator Research Complex H- ion-source development (invited). Rev Sci Instrum 2010; 81:02A720. [PMID: 20192389 DOI: 10.1063/1.3271243] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The following interesting experimental results observed in Japan Proton Accelerator Research Complex (J-PARC) H(-) ion-source developments are reviewed. It was proven that almost all of H(-) ions were produced with surface reactions in cesium (Cs)-free J-PARC H(-) ion-sources. The world's most intense class H(-) ion current of 38 mA in Cs-free ion sources for a high-energy linac was attained by an optimal shape and high temperature of the plasma electrode (PE), usage of a lanthanum hexaboride (LaB(6)) filament, and a newly devised high-power constant-current pulsed-arc power supply indispensable for it. It was also proven that the H(-) ion current could be increased to more than 40 mA by optimizing LaB(6)-filament shape. The surface elemental analysis of the PE after operation with a LaB(6)-filament showed that it was coated by boron (B) 95.5%, lanthanum (La) 2.5%, and oxygen (O) 1.9%. The H(-) ion current decreased by about 20% when a tungsten (W) filament was used instead of a LaB(6)-filament. The H(-) ion current could not be increased by seeding cesium (Cs) if the LaB(6)-filament was used. On the other hand, it was increased to more than 70 mA with much lower arc current of 150 A if Cs was seeded when a W-filament was used.
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Affiliation(s)
- A Ueno
- J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan.
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Ito A, Abe N, Ueno A, Koseki Y, Mori E, Tashiro M, Fujii T. Amygdala activity associated with unpleasant emotion induced by social appraisal: A PET study. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)72137-8] [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: 11/26/2022] Open
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Koseki Y, Abe N, Ueno A, Ito A, Mori E, Tashiro M, Fujii T. The brain empathic responses modulated by the affective link between self and others: A PET study. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)71989-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Abe N, Ueno A, Shigemune Y, Suzuki M, Mori E, Tashiro M, Fujii T. Right temporal lobe activity associated with the retrieval of family relationships in person identification: A positron emission tomography study. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)70152-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Ueno A, Abe N, Suzuki M, Shigemune Y, Hirayama K, Mori E, Tashiro M, Itoh M, Fujii T. Reactivation of the medial temporal lobe and visual association areas during the retrieval of visual information: a positron emission tomography study. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)70480-x] [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: 10/20/2022] Open
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Mochizuki Y, Enaida H, Hisatomi T, Hata Y, Miura M, Arita R, Kawahara S, Kita T, Ueno A, Ishibashi T. The internal limiting membrane peeling with brilliant blue G staining for retinal detachment due to macular hole in high myopia. Br J Ophthalmol 2008; 92:1009. [DOI: 10.1136/bjo.2007.126300] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Tago K, Takihana Y, Ueno A. Renal Functional Reserve in Kidney Transplants. Aktuelle Urol 2008. [DOI: 10.1055/s-2008-1060670] [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: 10/21/2022]
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47
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Oguri H, Ueno A, Namekawa Y, Ohkoshi K, Kondo Y, Ikegami K. Development and operation of a Cs-free J-PARC H(-) ion source. Rev Sci Instrum 2008; 79:02A506. [PMID: 18315127 DOI: 10.1063/1.2801369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A cesium-free H(-) ion source driven with a LaB(6) filament was developed for the J-PARC. It was operated for the J-PARC linac beam commissioning, which was started on 20 November 2006. Eight runs of 2 or 3 week beam commissioning were done until the end of June 2007. The source was mainly operated with a duty factor of 0.8% (320 micros and 25 Hz) while providing a 5 mA beam typically. Each interval of the runs, precise optimizations, such as the filament position, and so on, are examined. At present, a H(-) beam with a current of 38 mA and a rms normalized emittance of 0.22 pi mm mrad is extracted with a duty factor of 0.8% (320 micros and 25 Hz).
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Affiliation(s)
- H Oguri
- Japan Atomic Energy Agency (JAEA), Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan.
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Ueno A, Enaida H, Hata Y, Hisatomi T, Nakamura T, Mochizuki Y, Sakamoto T, Ishibashi T. Long-term clinical outcomes and therapeutic benefits of triamcinolone-assisted pars plana vitrectomy for proliferative vitreoretinopathy: a case study. Eur J Ophthalmol 2007; 17:392-8. [PMID: 17534822 DOI: 10.1177/112067210701700320] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
PURPOSE To investigate intraoperative visibility and long-term clinical outcome following triamcinolone acetonide (TA)-assisted pars plana vitrectomy (PPV) for proliferative vitreoretinopathy (PVR). METHODS A retrospective interventional noncomparative clinical study was carried out on 21 eyes from 21 patients with more than grade C2 PVR, all of whom underwent TA-assisted PPV. Two of the specimens were observed with an electron microscope. After treatment, outcome measures, including changes in best-corrected visual acuity (BCVA), intraocular pressure (IOP) elevation, corneal pathology, and occurrence of endophthalmitis, were recorded. Patient follow-up time was >36 months (mean +/-standard deviation = 47.3 +/- 6.7 months). RESULTS TA improved the intraoperative visualization of the epiretinal membrane (ERM), allowing it to be easily removed together with the partially internal limiting membrane (ILM) using micro forceps. The excised tissue consisted of proliferative cells and an extracellular matrix underlying the ILM. After the operation, 71.4% of the eyes had improved BCVA. Three of the eyes showed sustained IOP elevation (14.3%); two of these cases were controlled by the administration of eyedrops, while the third required filtering surgery. In two cases, an absorption delay of the TA granule on the retinal surface was observed. One eye developed corneal stromal opacity. No other severe complications occurred during the observation period. CONCLUSIONS TA-assisted PPV offers improved visualization during the surgical management of PVR, and allows surgeons to excise the ERM safely and effectively without the risk of serious complications.
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Affiliation(s)
- A Ueno
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Ikeda Y, Yonemitsu Y, Onimaru M, Nakano T, Miyazaki M, Kohno R, Nakagawa K, Ueno A, Sueishi K, Ishibashi T. The regulation of vascular endothelial growth factors (VEGF-A, -C, and -D) expression in the retinal pigment epithelium. Am J Ophthalmol 2007. [DOI: 10.1016/j.ajo.2007.02.010] [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]
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Ueno A, Manabe S, Uchikawa Y. Acoustic feedback system with digital signal processor to alert the subject and quantitative visualization of arousal reaction induced by the sound using dynamic characteristics of saccadic eye movement: a preliminary study. Conf Proc IEEE Eng Med Biol Soc 2007; 2005:6149-52. [PMID: 17281668 DOI: 10.1109/iembs.2005.1615898] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A new system has been developed to assess human alertness and to alert the subject with acoustic stimulation in accordance with the assessed level of alertness. Dynamic characteristics of saccadic eye movement (saccade: SC) were used to calculate an alertness index. Digital signal processor was adopted for the calculation. The system was tested through eye tracking tasks. The results indicated that the developed system could awaken the subject by feeding sound back to the subject. Also, arousal reaction induced by the sound was visualized quantitatively by analyzing values of the alertness index after the stimulation. These results indicate applicability of the system not only to awakening device for accident prevention, but also to a tool for investigating effects of the stimulation.
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Affiliation(s)
- A Ueno
- Department of Electronic and Computer Engineering, Tokyo Denki University, Saitama, Japan
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