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Besisa NHA, Yoon KS, Yamauchi M. In situ electrochemical regeneration of active 1,4-NADH for enzymatic lactic acid formation via concerted functions on Pt-modified TiO 2/Ti. Chem Sci 2024; 15:3240-3248. [PMID: 38425536 PMCID: PMC10901512 DOI: 10.1039/d3sc04104b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 12/13/2023] [Indexed: 03/02/2024] Open
Abstract
Nicotinamide adenine dinucleotide (NAD+) and its reduced form (NADH) are key cofactors serving as essential hydrogen acceptors and donors to facilitate energy and material conversions under mild conditions. We demonstrate direct electrochemical conversion to achieve highly efficient regeneration of enzymatically active 1,4-NADH using a Pt-modified TiO2 catalyst grown directly on a Ti mesh electrode (Pt-TOT). Spectral analyses revealed that defects formed by the inclusion of Pt species in the lattice of TiO2 play a critical role in the regeneration process. In particular, Pt-TOT containing approximately 3 atom% of Pt exhibited unprecedented efficiency in the electrochemical reduction of NAD+ at the lowest overpotential to date. This exceptional performance led to the production of active 1,4-NADH with a significantly high yield of 86 ± 3% at -0.6 V vs. Ag/AgCl (-0.06 V vs. RHE) and an even higher yield of 99.5 ± 0.4% at a slightly elevated negative potential of -0.8 V vs. Ag/AgCl (-0.2 V vs. RHE). Furthermore, the electrochemically generated NADH was directly applied in the enzymatic conversion of pyruvic acid to lactic acid using lactate dehydrogenase.
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Affiliation(s)
- Nada H A Besisa
- Department of Chemistry, Graduate School of Science, Kyushu University Fukuoka 819-0395 Japan
| | - Ki-Seok Yoon
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University Fukuoka 819-0395 Japan
| | - M Yamauchi
- Department of Chemistry, Graduate School of Science, Kyushu University Fukuoka 819-0395 Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University Fukuoka 819-0395 Japan
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University Fukuoka 819-0395 Japan
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University Sendai 980-8577 Miyagi Japan
- Research Center for Negative Emissions Technologies (K-Nets), Kyushu University Fukuoka 819-0395 Japan
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2
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Hara K, Ujiie A, Suzuki S, Okumura T, Kubo M, Shinozaki H, Yamauchi M, Tsuchiya T, Takebayashi K, Shimozawa N, Koga M, Hashimoto K. Analysis of five cases showing false-high Hemoglobin A1c due to reduced catalase activity. Endocr J 2024; 71:39-44. [PMID: 38030260 DOI: 10.1507/endocrj.ej23-0212] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2023] Open
Abstract
We encountered five cases that exhibited false-high Hemoglobin A1c (HbA1c) levels when samples were examined using the enzyme-based NORUDIA N HbA1c kit. HbA1c levels were higher than those obtained using other methods, such as HPLC, immune-based methods, and other enzyme-based kits. This kit produced inaccurate results for HbA1c when residual peroxides were present in samples. The addition of peroxidase solution restored false-high HbA1c levels in the five cases, indicating that reduced catalase activity was responsible for these values because catalase eliminates peroxide. Catalase activity and gene mutations were examined in the five cases and an immunohistological analysis was performed to assess the expression of catalase. Cases #1 and 2 were diagnosed as acatalasemia and cases #3, 4, and 5 as hypocatalasemia based on compound heterozygous SNP and heterozygous splicing mutations in the catalase gene. Therefore, impaired catalase activity was responsible for false-high HbA1c levels measured by the NORUDIA N HbA1c kit.
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Affiliation(s)
- Kenji Hara
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Saitama 343-8555, Japan
| | - Atsushi Ujiie
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Saitama 343-8555, Japan
| | - Shiori Suzuki
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Saitama 343-8555, Japan
| | - Takenori Okumura
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Saitama 343-8555, Japan
| | - Mio Kubo
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Saitama 343-8555, Japan
| | - Hiroyuki Shinozaki
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Saitama 343-8555, Japan
| | - Mototaka Yamauchi
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Saitama 343-8555, Japan
| | - Takafumi Tsuchiya
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Saitama 343-8555, Japan
| | - Kohzo Takebayashi
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Saitama 343-8555, Japan
| | - Nobuyuki Shimozawa
- Division of Genomics Research, Life Science Research Center, Gifu University, Gifu 501-1193, Japan
| | - Masafumi Koga
- Department of Internal Medicine, Hakuhokai Central Hospital, Hyogo 661-0953, Japan
| | - Koshi Hashimoto
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Saitama 343-8555, Japan
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Yamauchi M, Ono A, Amioka K, Fujii Y, Uchikawa S, Fujino H, Nakahara T, Murakami E, Okamoto W, Kawaoka T, Miki D, Tsuge M, Imamura M, Nelson H, Kato Y, Kimura M, Suzuki N, Aikata H, Chayama K. P-141 Lenvatinib activates potential anti-tumor immunity by increasing infiltration of immune cells and interferon response in tumor microenvironment of advanced hepatocellular carcinoma. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.04.231] [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: 11/01/2022] Open
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Kobayashi N, Toyama H, Kubo R, Matsuda Y, Okada Y, Ejima Y, Yamauchi M. Bicarbonate in Arteries Measured Preoperatively for Cadaveric Single-lung Transplantation is Related to Intraoperative Extra-Corporeal Membrane Oxygenation Use: A Retrospective Preliminary Study. Int J Organ Transplant Med 2021; 12:37-42. [PMID: 36570358 PMCID: PMC9758997] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Background There are no known predictors of extracorporeal membrane oxygenation (ECMO) induction for single lung transplantation. Objective The purpose of the present study was to clarify the relationship between variables and ECMO requirements in single lung transplantation. Methods This study included adult patients who underwent cadaveric single lung transplantation between 2010 and 2019. After general anesthesia, the transplanted lungs were ventilated in all cases. The analysis included 38 patients in the ECMO required (RQ) group and 12 patients in the ECMO non-required (FR) group. Comparisons were made between the two groups for data affecting ECMO implementation, and data that were significantly different were subjected to multivariate analysis. Results Prior to anesthesia, the bicarbonate (HCO3-) value of the FR group was lower than that of the RQ group (24.6±2.7 vs. 29.7±5.3 mmol/L, p=0.005). Multivariate analysis showed that the cut-off bicarbonate value was 29.6. The area under the receiver operating characteristic curve (AUROC) of the model was 0.869 (R2: 0.331), with a sensitivity of 79% and a specificity of 88%. The odds ratio was 1.63 for every unit increase in the bicarbonate value (95%CI: 1.11-2.39, p<0.001). Further, the FR group had higher arterial blood pressure (mean: 79.0±11.5 vs. 68.9±8.3 mmHg, p=0.030), less blood loss (432±385 vs. 1,623±1,997 g, p<0.001), shorter operation time (417±44 vs. 543±111 min, p<0.001), and shorter ICU stay (11±9 vs. 25±38 days, p=0.039). Conclusion Preoperative evaluation of bicarbonate could predict the need for ECMO for single lung transplantation.
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Affiliation(s)
- N. Kobayashi
- Department of Anesthesiology and Perioperative Medicine, School of Medicine, Tohoku University, Japan,Correspondence: Naoya Kobayashi, MD, PhD, Department of Anesthesiology, Tohoku University Hospital 1-1 Seiryomachi, Aoba, Sendai, Japan, 980-857
| | - H. Toyama
- Department of Anesthesiology and Perioperative Medicine, School of Medicine, Tohoku University, Japan
| | - R. Kubo
- Department of Anesthesiology and Perioperative Medicine, School of Medicine, Tohoku University, Japan
| | - Y. Matsuda
- Department of Thoracic Surgery, Institute of Development, Aging and Cancer, Tohoku University, Japan
| | - Y. Okada
- Department of Thoracic Surgery, Institute of Development, Aging and Cancer, Tohoku University, Japan
| | - Y. Ejima
- Department of Surgical Center and Supply, Tohoku University, Japan
| | - M. Yamauchi
- Department of Anesthesiology and Perioperative Medicine, School of Medicine, Tohoku University, Japan
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Takebayashi K, Suzuki T, Yamauchi M, Hara K, Tsuchiya T, Inukai T, Hashimoto K. Association of circulating soluble lectin-like oxidized low-density lipoprotein receptor-1 with inflammatory markers and urinary albumin excretion in patients with type 2 diabetes. SAGE Open Med 2021; 9:20503121211064468. [PMID: 34992779 PMCID: PMC8724995 DOI: 10.1177/20503121211064468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 11/16/2021] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVES The main purpose of the study was to study the association between circulating soluble lectin-like oxidized low-density lipoprotein receptor-1 levels and various markers, including inflammatory markers such as high-sensitivity C-reactive protein and fibrinogen, serum lipids, and renal function, in patients with poorly controlled type 2 diabetes. METHODS The subjects were 70 patients (men 45, women 25) who were hospitalized for treatment of poor glycemic control. Plasma soluble lectin-like oxidized low-density lipoprotein receptor-1 levels were assayed using a sandwich chemiluminescence enzyme immunoassay. RESULTS Circulating soluble lectin-like oxidized low-density lipoprotein receptor-1 was significantly positively correlated with lectin-like oxidized low-density lipoprotein-1 ligands containing apolipoprotein B, reflecting modified low-density lipoprotein, and with inflammatory markers such as high-sensitivity C-reactive protein and fibrinogen. In addition, there was a significant positive correlation between soluble lectin-like oxidized low-density lipoprotein receptor-1 and urinary albumin excretion. CONCLUSIONS Soluble lectin-like oxidized low-density lipoprotein receptor-1 may serve as a marker reflecting the degrees of inflammation and albuminuria in patients with poorly controlled type 2 diabetes.
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Affiliation(s)
- Kohzo Takebayashi
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Koshigaya, Japan
| | - Tatsuhiko Suzuki
- Department of Emergency and Critical Care Medicine, Emergency and Critical Care Center, Dokkyo Medical University Saitama Medical Center, Koshigaya, Japan
| | - Mototaka Yamauchi
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Koshigaya, Japan
| | - Kenji Hara
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Koshigaya, Japan
| | - Takafumi Tsuchiya
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Koshigaya, Japan
| | - Toshihiko Inukai
- Department of Internal Medicine, Seibu General Hospital, Omiya, Japan
| | - Koshi Hashimoto
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Koshigaya, Japan
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Takebayashi K, Furukawa S, Okumura T, Kubo M, Ujiie A, Yamauchi M, Shinozaki H, Hara K, Tsuchiya T, Ono Y, Inukai T, Hashimoto K. Severe Non-Islet Cell Hypoglycemia From Ileum-Origin Gastrointestinal Stromal Tumor Producing Insulin-Like Growth Factor-2 in a Patient With Liver Cirrhosis Due to Chronic Hepatitis B. J Clin Med Res 2020; 12:824-830. [PMID: 33447317 PMCID: PMC7781283 DOI: 10.14740/jocmr4326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 09/05/2020] [Indexed: 11/11/2022] Open
Abstract
Non-islet cell tumor hypoglycemia (NICTH) is a rare paraneoplastic syndrome, and NICTH associated with gastrointestinal stromal tumor (GIST) is even more rare. Herein, we describe a patient with severe NICTH due to GIST who had developed liver cirrhosis as a consequence of chronic hepatitis B. Although circulating insulin, C-peptide, and insulin-like growth factor-1 (IGF-1) levels were significantly decreased, in contrast to our expectations, the growth hormone (GH) level was slightly elevated. Steroid therapy with prednisolone appeared to be effective for the prevention of severe and continuous hypoglycemia.
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Affiliation(s)
- Kohzo Takebayashi
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Saitama Medical Center, Koshigaya, Saitama, Japan
| | - Sho Furukawa
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Saitama Medical Center, Koshigaya, Saitama, Japan
| | - Takenori Okumura
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Saitama Medical Center, Koshigaya, Saitama, Japan
| | - Mio Kubo
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Saitama Medical Center, Koshigaya, Saitama, Japan
| | - Atsushi Ujiie
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Saitama Medical Center, Koshigaya, Saitama, Japan
| | - Mototaka Yamauchi
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Saitama Medical Center, Koshigaya, Saitama, Japan
| | - Hiroyuki Shinozaki
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Saitama Medical Center, Koshigaya, Saitama, Japan
| | - Kenji Hara
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Saitama Medical Center, Koshigaya, Saitama, Japan
| | - Takafumi Tsuchiya
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Saitama Medical Center, Koshigaya, Saitama, Japan
| | - Yuko Ono
- Department of Pathology, Dokkyo Saitama Medical Center, Koshigaya, Saitama, Japan
| | - Toshihiko Inukai
- Department of Internal Medicine, Seibu General Hospital, Omiya, Saitama, Japan
| | - Koshi Hashimoto
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Saitama Medical Center, Koshigaya, Saitama, Japan
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Yamauchi-Kawaura C, Fujii K, Yamauchi M, Imai K, Ikeda M, Narai K, Shimizu H. DEVELOPMENT OF A JAPANESE INFANT HEAD-CHEST PHANTOM AND INVESTIGATION OF THE CURRENT STATUS OF INFANT HEAD CT EXAMINATIONS IN JAPAN. Radiat Prot Dosimetry 2020; 188:65-72. [PMID: 31836891 DOI: 10.1093/rpd/ncz261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 09/12/2019] [Indexed: 06/10/2023]
Abstract
The aim of this study was to develop a head-chest phantom that could mimic the physique of a Japanese 0.5-year-old child and to investigate the current status of exposure dose in infant head computed tomography examinations in Japan. The phantom was produced by machine processing, and radiophotoluminescence glass dosemeters were installed in the phantom for dose measurement. Organ doses were measured for seven different head scan protocols routinely used in three hospitals. In this study, the average dose of the brain and lens within the scan region was equivalent to that measured using infant phantoms in previous studies. In contrast, the doses of both salivary glands and thyroid glands adjacent to the scan region were 1.4-1.8 times higher than those in previous studies. Expansion of the scan area accompanied by a transition of the scan mode from non-helical to helical may have resulted in the differences in organ doses.
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Affiliation(s)
- C Yamauchi-Kawaura
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - K Fujii
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - M Yamauchi
- Division of Radiology, Aichi Medical University Hospital, Nagakute, Aichi 480-1195, Japan
| | - K Imai
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - M Ikeda
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - K Narai
- Techno-Rad, Inc., 50-8, Higashi Arami, Tai, Miyama-cho, Kuze-gun, Kyoto 613-0036, Japan
| | - H Shimizu
- Department of Radiation Oncology, Aichi Cancer Center Hospital, 1-1 Kanokoden, Chikusa-ku, Nagoya 464-8681, Japan
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Hara K, Koga M, Shinozaki H, Yamauchi M, Suzuki T, Naruse R, Tsuchiya T, Takebayashi K, Inukai T, Hashimoto K. Hb Phnom Penh Showing Falsely High or Reasonable HbA1c Values Depending on the Type of High-performance Liquid Chromatography System. Intern Med 2020; 59:805-809. [PMID: 31787693 PMCID: PMC7118387 DOI: 10.2169/internalmedicine.3306-19] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
We herein report a 50-year-old Chinese woman with Hb Phnom Penh (α117Phe-Ile-α118Thr) showing high or reasonable HbA1c values depending on the type of high-performance liquid chromatography (HPLC) system. A high HbA1c value of 7.5% (HPLC assay: G9) and a reasonable HbA1c value of 5.2% (assay unknown) were observed. Therefore, the patient was refereed to our hospital; the oral glucose tolerance test showed normal glucose tolerance. The HbA1c values measured by an enzymatic assay, immunoassay, and affinity assay, as well as most HPLC assays were within the reference range, whereas those measured by the Tosoh HPLC systems were high.
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Affiliation(s)
- Kenji Hara
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Japan
| | - Masafumi Koga
- Department of Internal Medicine, Hakuhokai Central Hospital, Japan
| | - Hiroyuki Shinozaki
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Japan
| | - Mototaka Yamauchi
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Japan
| | - Tatsuhiko Suzuki
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Japan
| | - Rika Naruse
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Japan
| | - Takafumi Tsuchiya
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Japan
| | - Kohzo Takebayashi
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Japan
| | - Toshihiko Inukai
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Japan
| | - Koshi Hashimoto
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Japan
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Yamauchi-Kawaura C, Fujii K, Yamauchi M, Yamamoto S, Kozuka M, Ohzawa N, Suga N, Ito N. SHAPE ESTIMATION OF BOWTIE FILTERS BASED ON THE LUMINESCENCE FROM POLYETHYLENE TEREPHTHALATE RESIN BY X-RAY IRRADIATION. Radiat Prot Dosimetry 2019; 185:432-439. [PMID: 30916354 DOI: 10.1093/rpd/ncz031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 01/27/2019] [Accepted: 02/28/2019] [Indexed: 06/09/2023]
Abstract
In this study, we devised a novel method estimating the bowtie filter shapes by imaging luminescence from a polyethylene terephthalate (PET) resin with X-ray irradiation in a computed tomography (CT) scanner. The luminescence distribution of the PET resin corresponding to the thickness of bowtie filter was imaged using a charge-coupled device camera. On the assumption that the material of bowtie filter is aluminium (Al), the shape of bowtie filters was estimated from the correlation between Al attenuation curves and the angular-dependent luminance attenuation profiles according to the thickness of bowtie filters. Dose simulations based on the estimated bowtie filter shapes were performed using head and body PMMA phantoms with 16 and 32 cm in diameter. The simulated values of head and body weighted CT dose index (CTDIw) based on bowtie filter shape by the luminescence imaging method agreed within ~9% with the measured values by a dosemeter.
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Affiliation(s)
- C Yamauchi-Kawaura
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - K Fujii
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - M Yamauchi
- Division of Radiology, Aichi Medical University Hospital, Nagakute, Aichi 480-1195, Japan
| | - S Yamamoto
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - M Kozuka
- Department of Radiological Technology, School of Health Sciences, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - N Ohzawa
- Department of Radiological Technology, School of Health Sciences, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - N Suga
- Department of Radiological Technology, School of Health Sciences, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - N Ito
- Department of Radiological Technology, School of Health Sciences, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
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10
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Matsuda N, Fukuda N, Yamauchi M, Tsunoyama Y, Tomita S, Kita M. HIGH BACKGROUND AREA FOR RADIATION EDUCATION. Radiat Prot Dosimetry 2019; 184:294-297. [PMID: 31330016 DOI: 10.1093/rpd/ncz084] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 04/03/2019] [Indexed: 06/10/2023]
Abstract
This paper describes our trial experience of the use of high radiation area for radiation education. We used environmental samples collected from the high radiation area in Fukushima prefecture and India, for the practice of radiation measurement and health risk assessment in Nagasaki University Medical School. We also carried out the field monitoring seminar for students in the existing exposure areas in Tottori prefecture and the Yamakiya observatory in Fukushima. Although the evaluation of educational effectiveness is still underway, both types of education appeared attractive for the students mostly due to the exposure from natural environment in our real life which was not achieved by using an artificial radiation source in a classroom.
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Affiliation(s)
- N Matsuda
- Atomic Bomb Disease Institute, Nagasaki University, 1-12-4 Sakamoto, Nagasaki, Japan
| | - N Fukuda
- Atomic Bomb Disease Institute, Nagasaki University, 1-12-4 Sakamoto, Nagasaki, Japan
| | - M Yamauchi
- Atomic Bomb Disease Institute, Nagasaki University, 1-12-4 Sakamoto, Nagasaki, Japan
| | - Y Tsunoyama
- Radioisotope Research Center, Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto, Japan
| | - S Tomita
- Radiation Research and Management Center, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Japan
| | - M Kita
- Organization for Research Initiative and Promotion, Tottori University, 4-101 Koyama-cho Minami, Tottori, Japan
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11
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Uzawa K, Amelio AL, Tanzawa H, Yamauchi M. Response to Letter to the Editor: "Aberrant Collagen Cross-linking in Human Oral Squamous Cell Carcinoma". J Dent Res 2019; 98:823. [PMID: 31140896 DOI: 10.1177/0022034519853263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- K Uzawa
- 1 Department of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, Chiba, Japan.,2 Department of Oral Science, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - A L Amelio
- 3 Department of Oral and Craniofacial Health Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,4 Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - H Tanzawa
- 1 Department of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, Chiba, Japan.,2 Department of Oral Science, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - M Yamauchi
- 3 Department of Oral and Craniofacial Health Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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12
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Saito T, Uzawa K, Terajima M, Shiiba M, Amelio A, Tanzawa H, Yamauchi M. Aberrant Collagen Cross-linking in Human Oral Squamous Cell Carcinoma. J Dent Res 2019; 98:517-525. [DOI: 10.1177/0022034519828710] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Tumor progression is a complex process involving extracellular matrix (ECM) remodeling and stiffening. However, the mechanisms that govern these processes and their roles in tumor progression are still poorly understood. In this study, we performed bioinformatics, immunohistochemical, and biochemical analyses to examine if collagen cross-linking is associated with tumor stage and regional lymph node metastasis (RLNM) in oral squamous cell carcinoma (OSCC). We found that the genes encoding key enzymes for cross-linking are frequently overexpressed in oral, head, and neck cancers. Specifically, the enzymes lysyl hydroxylase 2 (LH2) or lysyl oxidase (LOX) and LOX-like 2 (LOXL2) were significantly upregulated in late-stage tumors and associated with poor patient prognosis. The protein levels of these enzymes in the primary human OSCC were also significantly increased in late-stage tumors and markedly elevated in the RLNM-positive tumors. Notably, while overall LOX/LOXL2-catalyzed collagen cross-links were enriched in late-stage and RLNM-positive tumors, LH2-mediated stable cross-links were significantly increased. To our knowledge, this is the first study to investigate the association of collagen cross-linking and expression of key enzymes regulating this process with OSCC stage. The data indicate a critical role for collagen cross-linking in OSCC tumor progression and metastasis, which may provide insights into development of novel therapeutic strategies to prevent OSCC progression.
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Affiliation(s)
- T. Saito
- Department of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, Chiba, Japan
| | - K. Uzawa
- Department of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, Chiba, Japan
- Department of Oral Science, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - M. Terajima
- Department of Oral and Craniofacial Health Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - M. Shiiba
- Department of Medical Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - A.L. Amelio
- Department of Oral and Craniofacial Health Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - H. Tanzawa
- Department of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, Chiba, Japan
- Department of Oral Science, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - M. Yamauchi
- Department of Oral and Craniofacial Health Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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13
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Yamauchi M, Hata S, Eguchi H, Kitano S, Fukushima T, Higashi M, Sadakiyo M, Kato K. Catalytic enhancement on Ti–Zr complex oxide particles for electrochemical hydrogenation of oxalic acid to produce an alcoholic compound by controlling electronic states and oxide structures. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01541h] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ti0.9Zr0.1O2 complex oxide particles exhibit superior catalytic performances for the direct power storage into glycolic acid via electroreduction of oxalic acid due to favorable crystallinity.
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Affiliation(s)
- M. Yamauchi
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Nishi-ku
- Japan
| | - S. Hata
- Department of Applied Chemistry
- Faculty of Engineering
- Sanyo-Onoda City University
- Sanyo-Onoda
- Japan
| | - H. Eguchi
- Department of Chemistry
- Graduate School of Science
- Kyushu University
- Nishi-ku
- Japan
| | - S. Kitano
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Nishi-ku
- Japan
| | - T. Fukushima
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Nishi-ku
- Japan
| | - M. Higashi
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Nishi-ku
- Japan
| | - M. Sadakiyo
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Nishi-ku
- Japan
| | - K. Kato
- RIKEN SPring-8 Center
- Sayo-gun
- Japan
- JST
- PRESTO
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14
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Yamauchi-Kawaura C, Yamamoto S, Fujii K, Komori M, Yamauchi M, Ohzawa N, Kozuka M, Suga N, Ito N, Fukuyama A. MEASUREMENT OF INTERNAL RADIATION DOSE DISTRIBUTION IN CT EXAMINATIONS USING POLYETHYLENE TEREPHTHALATE RESIN. Radiat Prot Dosimetry 2018; 181:303-309. [PMID: 29444315 DOI: 10.1093/rpd/ncy026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 02/06/2018] [Indexed: 06/08/2023]
Abstract
This study proposes a new dosimetry method for the estimation of the internal radiation dose distribution of a subject undergoing computed tomography (CT) examinations. In this novel method, dose distribution of a subject by CT scans was estimated based on radiophotoluminance distribution with polyethylene terephthalate (PET) resin which was cut to the average head size of a Japanese 1-year-old child. The difference in dose distribution depending on the type of bowtie filter was visualized by imaging luminance distribution with the PET phantom using a charge-coupled device camera. Dose distribution images simulated from a water phantom of the same size as the PET phantom were compared with the luminance distribution images. The linear correlation was demonstrated between luminance of the PET phantom and the simulated water dose. In comparison with the simulated water doses and the converted water doses from luminance of the PET phantom, the relative differences were within 20%.
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Affiliation(s)
- C Yamauchi-Kawaura
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya, Japan
| | - S Yamamoto
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya, Japan
| | - K Fujii
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya, Japan
| | - M Komori
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya, Japan
| | - M Yamauchi
- Division of Radiology, Aichi Medical University Hospital, Nagakute, Aichi, Japan
| | - N Ohzawa
- Department of Radiological Technology, School of Health Sciences, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya, Japan
| | - M Kozuka
- Department of Radiological Technology, School of Health Sciences, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya, Japan
| | - N Suga
- Department of Radiological Technology, School of Health Sciences, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya, Japan
| | - N Ito
- Department of Radiological Technology, School of Health Sciences, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya, Japan
| | - A Fukuyama
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya, Japan
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15
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Takebayashi K, Ujiie A, Kubo M, Furukawa S, Yamauchi M, Shinozaki H, Suzuki T, Naruse R, Hara K, Tsuchiya T, Inukai T. Isolated Adrenocorticotropic Hormone Deficiency and Severe Hypercalcemia After Destructive Thyroiditis in a Patient on Nivolumab Therapy With a Malignant Melanoma. J Clin Med Res 2018; 10:358-362. [PMID: 29511426 PMCID: PMC5827922 DOI: 10.14740/jocmr3257w] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 11/20/2017] [Indexed: 11/25/2022] Open
Abstract
We describe a 58-year-old man with a malignant melanoma metastasis to the liver. After initiation of nivolumab therapy, he developed destructive thyroiditis and subsequently simultaneous isolated adrenocorticotropic hormone (ACTH) deficiency and severe hypercalcemia. Although isolated ACTH deficiency and hypercalcemia due to nivolumab therapy are both rare occurrences, these conditions can often cause a severe clinical course accompanied by a disturbance of consciousness. Therefore, clinicians should pay attention to these possible side effects of nivolumab if the patients have clinical symptoms, such as fatigue and a disturbance of consciousness.
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Affiliation(s)
- Kohzo Takebayashi
- Department of Internal Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya, Saitama, Japan
| | - Atsushi Ujiie
- Department of Internal Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya, Saitama, Japan
| | - Mio Kubo
- Department of Internal Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya, Saitama, Japan
| | - Sho Furukawa
- Department of Internal Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya, Saitama, Japan
| | - Mototaka Yamauchi
- Department of Internal Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya, Saitama, Japan
| | - Hiroyuki Shinozaki
- Department of Internal Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya, Saitama, Japan
| | - Tatsuhiko Suzuki
- Department of Internal Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya, Saitama, Japan
| | - Rika Naruse
- Department of Internal Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya, Saitama, Japan
| | - Kenji Hara
- Department of Internal Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya, Saitama, Japan
| | - Takafumi Tsuchiya
- Department of Internal Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya, Saitama, Japan
| | - Toshihiko Inukai
- Department of Internal Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya, Saitama, Japan
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16
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Guo H, Tsai CL, Chen Y, Terajima M, Yamauchi M, Alvarado S, Cho E, Dalby K, Phillips G, Tainer J, Kurie J. Structure-Based Drug Design Targeting a Pro-Metastatic Collagen Lysyl Hydroxylase. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.06.048] [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: 10/19/2022]
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17
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Tsuchiya B, Nagata S, Toh K, Shikama T, Yamauchi M, Nishitani T. Radiation Damage of Proton Conductive Ceramics Under 14 MeV Fast Neutron Irradiation. Fusion Science and Technology 2017. [DOI: 10.13182/fst05-a800] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- B. Tsuchiya
- Institute for Materials Research, Tohoku University: 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan, and
| | - S. Nagata
- Institute for Materials Research, Tohoku University: 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan, and
| | - K. Toh
- Institute for Materials Research, Tohoku University: 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan, and
| | - T. Shikama
- Institute for Materials Research, Tohoku University: 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan, and
| | - M. Yamauchi
- Japan Atomic Energy Research Institute, Tokai Research Establishment: Facility of Fast Neutron Source, Tokai-mura, Ibaraki 319-1195, Japan, and
| | - T. Nishitani
- Japan Atomic Energy Research Institute, Tokai Research Establishment: Facility of Fast Neutron Source, Tokai-mura, Ibaraki 319-1195, Japan, and
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18
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Abstract
Several studies have indicated differences in bond strength of dental materials to crown and root dentin. To investigate the potential differences in matrix properties between these locations, we analyzed upper root and crown dentin in human third molars for ultimate tensile strength and collagen biochemistry. In both locations, tensile strength tested perpendicular to the direction of dentinal tubules (undemineralized crown = 140.4 ± 48.6/root = 95.9 ± 26.1; demineralized crown = 16.6 ± 6.3/root = 29.0 ± 12.4) was greater than that tested parallel to the tubular direction (undemineralized crown = 73.1 ± 21.2/root = 63.2 ± 22.6; demineralized crown = 9.0 ± 3.9/root = 16.2 ± 8.0). The demineralized specimens showed significantly greater tensile strength in root than in crown. Although the collagen content was comparable in both locations, two major collagen cross-links, dehydrodihydroxylysinonorleucine/its ketoamine and pyridinoline, were significantly higher in the root (by ~ 30 and ~ 55%, respectively) when compared with those in the crown. These results indicate that the profile of collagen cross-linking varies as a function of anatomical location in dentin and that the difference may partly explain the site-specific tensile strength.
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Affiliation(s)
- P A Miguez
- Dental Research Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7455, USA
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Yamauchi-Kawaura C, Fujii K, Akahane K, Yamauchi M, Obara S, Narai K, Katsu T, Imai K, Ikeda M. DEVELOPMENT OF AGE-SPECIFIC JAPANESE PHYSICAL PHANTOMS FOR DOSE EVALUATION IN INFANT CT EXAMINATIONS. Radiat Prot Dosimetry 2016; 171:483-502. [PMID: 26420904 DOI: 10.1093/rpd/ncv420] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 09/03/2015] [Accepted: 09/04/2015] [Indexed: 06/05/2023]
Abstract
Secondary to the previous development of age-specific Japanese head phantoms, the authors designed Japanese torso phantoms for dose assessment in infant computed tomography (CT) examinations and completed a Japanese 3-y-old head-torso phantom. For design of age-specific torso phantoms (0, 0.5, 1 and 3 y old), anatomical structures were measured from CT images of Japanese infant patients. From the CT morphometry, it was found that rib cages of Japanese infants were smaller than those in Europeans and Americans. Radiophotoluminescence glass dosemeters were used for dose measurement of a 3-y-old head-torso phantom. To examine the validity of the developed phantom, organ and effective doses by the in-phantom dosimetry system were compared with simulation values in a web-based CT dose calculation system (WAZA-ARI). The differences in doses between the two systems were <20 % at the doses of organs within scan regions and effective doses in head, chest and abdominopelvic CT examinations.
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Affiliation(s)
- C Yamauchi-Kawaura
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - K Fujii
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - K Akahane
- Medical Exposure Research Promotion Section, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - M Yamauchi
- Division of Radiology, Aichi Medical University Hospital, Nagakute, Aichi 480-1195, Japan
| | - S Obara
- Medical Exposure Research Promotion Section, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - K Narai
- Techno-Rad, Inc., 50-8, Higashi Arami, Tai, Miyama-cho, Kuze-gun, Kyoto 613-0036, Japan
| | - T Katsu
- Division of Radiology, Nagoya University Hospital, Tsurumai-cho, Showa-ku, Nagoya 466-8560, Japan
| | - K Imai
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - M Ikeda
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
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Yamauchi M, Maruyama S, Ohashi N, Toyabe K, Matsumoto Y. Epitaxial growth of atomically flat KBr(111) films via a thin film ionic liquid in a vacuum. CrystEngComm 2016. [DOI: 10.1039/c6ce00620e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Yamauchi-Kawaura C, Fujii K, Akahane K, Yamauchi M, Narai K, Aoyama T, Katsu T, Obara S, Imai K, Ikeda M. Development of age-specific Japanese head phantoms for dose evaluation in paediatric head CT examinations. Radiat Prot Dosimetry 2015; 163:188-201. [PMID: 24821932 DOI: 10.1093/rpd/ncu155] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this study, the authors developed age-specific physical head phantoms simulating the physique of Japanese children for dose evaluation in paediatric head computed tomography (CT) examinations. Anatomical structures at 99 places in 0-, 0.5-, 1- and 3-y-old Japanese patients were measured using DICOM viewer software from CT images, and the head phantom of each age was designed. For trial manufacture, a 3-y-old head phantom consisting of acrylic resin and gypsum was produced by machine processing. Radiation doses for the head phantom were measured with radiophotoluminescence glass dosemeters and Si-pin photodiode dosemeters. To investigate whether the phantom shape was suitable for dose evaluation, organ doses in the same scan protocol were compared between the 3-y-old head and commercially available anthropomorphic phantoms having approximately the same head size. The doses of organs in both phantoms were equivalent. The authors' designed paediatric head phantom will be useful for dose evaluation in paediatric head CT examinations.
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Affiliation(s)
- C Yamauchi-Kawaura
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - K Fujii
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - K Akahane
- Radiological Protection Section, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - M Yamauchi
- Division of Radiology, Aichi Medical University Hospital, Nagakute, Aichi 480-1195, Japan
| | - K Narai
- Techno-Rad, Inc., 50-8, Higashi Arami, Tai, Miyama-cho, Kuze-gun, Kyoto 613-0036, Japan
| | - T Aoyama
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - T Katsu
- Division of Radiology, Nagoya University Hospital, Tsurumai-cho, Showa-ku, Nagoya 466-8560, Japan
| | - S Obara
- Radiological Protection Section, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - K Imai
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
| | - M Ikeda
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
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Fukuda T, Imai K, Yamauchi M, Teramae M, Hashiguchi Y, Ichimura T, Yasui T, Sumi T. Primary peritoneal cancer: study of 14 cases and comparison with epithelial ovarian cancer. EUR J GYNAECOL ONCOL 2015; 36:49-53. [PMID: 25872334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
PURPOSE OF INVESTIGATION Primary peritoneal carcinoma (PPC) is histologically similar to ovarian serous carcinoma, but its biochemical features remain obscure. The authors investigated and compared clinical findings, treatments, and outcomes of patients with PPS and those with epithelial ovarian cancer (EOC) patients. MATERIALS AND METHODS The authors retrospectively reviewed data from 14 patients with PPC and 219 patients with EOC treated at the present hospital from January 2005 to December 2012, including demographic data, pathologic findings, treatments, and outcomes. RESULTS Patients with PPC were significantly older (62.6 ± 8.4 years) than those with EOC (56.3 ± 11.3 years) (p = 0.045). There was no significant difference in serum CA-125 levels. The five-year survival rates did not differ significantly between patients with PPC (61.1%) and those with EOC (60.3%; p = 0.78); nor between patients with PPC and those with Stage III serous EOC (43.8%; p = 0.40). CONCLUSIONS Treatment strategies for EOC applied to PPC apparently led to similar survival patterns among the two patient groups. Cytoreductive surgery combined with pre/postoperative platinum-containing chemotherapy may be effective for PPC patients.
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Isobe M, Ogawa K, Miyake H, Hayashi H, Kobuchi T, Nakano Y, Watanabe K, Uritani A, Misawa T, Nishitani T, Tomitaka M, Kumagai T, Mashiyama Y, Ito D, Kono S, Yamauchi M, Takeiri Y. Wide dynamic range neutron flux monitor having fast time response for the Large Helical Device. Rev Sci Instrum 2014; 85:11E114. [PMID: 25430293 DOI: 10.1063/1.4891049] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [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
A fast time response, wide dynamic range neutron flux monitor has been developed toward the LHD deuterium operation by using leading-edge signal processing technologies providing maximum counting rate up to ∼5 × 10(9) counts/s. Because a maximum total neutron emission rate over 1 × 10(16) n/s is predicted in neutral beam-heated LHD plasmas, fast response and wide dynamic range capabilities of the system are essential. Preliminary tests have demonstrated successful performance as a wide dynamic range monitor along the design.
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Affiliation(s)
- M Isobe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K Ogawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H Miyake
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H Hayashi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T Kobuchi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y Nakano
- Department of Materials, Physics and Energy Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - K Watanabe
- Department of Materials, Physics and Energy Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - A Uritani
- Department of Materials, Physics and Energy Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - T Misawa
- Kyoto University Research Reactor Institute, Kumatori 590-0494, Japan
| | - T Nishitani
- Japan Atomic Energy Agency, Rokkasho 039-3212, Japan
| | - M Tomitaka
- Toshiba Corporation, Fuchu 183-8511, Japan
| | - T Kumagai
- Toshiba Corporation, Fuchu 183-8511, Japan
| | | | - D Ito
- Toshiba Corporation, Fuchu 183-8511, Japan
| | - S Kono
- Toshiba Corporation, Fuchu 183-8511, Japan
| | - M Yamauchi
- Toshiba Nuclear Engineering Services Corporation, Yokohama 235-8523, Japan
| | - Y Takeiri
- National Institute for Fusion Science, Toki 509-5292, Japan
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Iwakiri R, Higuchi K, Kato M, Fujishiro M, Kinoshita Y, Watanabe T, Takeuchi T, Yamauchi M, Sanomura M, Nakagawa H, Sugisaki N, Okada Y, Ogawa H, Arakawa T, Fujimoto K. Randomised clinical trial: prevention of recurrence of peptic ulcers by rabeprazole in patients taking low-dose aspirin. Aliment Pharmacol Ther 2014; 40:780-95. [PMID: 25100080 DOI: 10.1111/apt.12907] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 05/28/2014] [Accepted: 07/18/2014] [Indexed: 12/21/2022]
Abstract
BACKGROUND Few studies have evaluated the effects of rabeprazole on low-dose aspirin (LDA)-induced gastroduodenal injuries. AIM To conduct a randomised, double-blind, triple-dummy, active-controlled, multicentre trial, named the PLANETARIUM study, to assess the efficacy, dose-response relationship and safety of rabeprazole for peptic ulcer recurrence in Japanese patients on long-term LDA therapy. METHODS Eligible patients had a history of endoscopically confirmed peptic ulcers and were receiving long-term LDA (81 or 100 mg/day) therapy for cardiovascular or cerebrovascular protection. Subjects were randomly segregated into three groups receiving rabeprazole 10 mg once daily (standard dose in Japan), rabeprazole 5 mg once daily, or teprenone (geranylgeranylacetone; mucosal protective agent commercially available in Japan) 50 mg three times per day as an active control. The primary endpoint was recurrence of peptic ulcers over 24 weeks. RESULTS Among 472 randomised subjects, 452 subjects (n = 151, 150, 151, respectively) constituted the full analysis set. The cumulative recurrence rates of peptic ulcers over 24 weeks in the 10- and 5-mg rabeprazole groups were 1.4% and 2.8%, respectively, both of which were significantly lower than that in the teprenone group (21.7%). The cumulative occurrence rate of bleeding ulcers over 24 weeks in the teprenone group was 4.6%, while bleeding ulcers were not observed in the 10- or 5-mg rabeprazole groups. Rabeprazole was well tolerated at both doses. CONCLUSION Rabeprazole prevents the recurrence of peptic ulcers with no evidence of a major dose-response effect in subjects on low-dose aspirin therapy.
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Affiliation(s)
- R Iwakiri
- Department of Internal Medicine & Gastrointestinal Endoscopy, Saga Medical School, Saga, Japan
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Morioka A, Sato S, Ochiai K, Sakasai A, Hori J, Yamauchi M, Nishitani T, Kaminaga A, Masaki K, Sakurai S, Hayashi T, Matsukawa M, Tamai H, Ishida S. Neutron Tranamission Experiment of Boron-doped Resin for the JT-60SC Neutron Shield using 2.45 Mev Neutron Source. J NUCL SCI TECHNOL 2014. [DOI: 10.1080/00223131.2004.10875657] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [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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Yamauchi M, Okubo K, Tsukuda T, Kato K, Takata M, Takeda S. Hydrogen-induced structural transformation of AuCu nanoalloys probed by synchrotron X-ray diffraction techniques. Nanoscale 2014; 6:4067-4071. [PMID: 24608274 DOI: 10.1039/c3nr06327e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In situ X-ray diffraction measurements reveal that the transformation of a AuCu nanoalloy from a face-centered-cubic to an L10 structure is accelerated under a hydrogen atmosphere. The structural transformation rate for the AuCu nanoalloy under hydrogen above 433 K was found to be 100 times faster than that in a vacuum, which is the first quantitative observation of hydrogen-induced ordering of nanoalloys.
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Affiliation(s)
- M Yamauchi
- WPI-I2CNER, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
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Nakagawa Y, Yamauchi M, Ogawa R, Watada M, Mizukami K, Okimoto T, Kodama M, Murakami K, Fujioka T. Complete pancreas divisum with patulous minor papilla complicated by multifocal branch-duct intraductal papillary mucinous neoplasms. Endoscopy 2014; 45 Suppl 2 UCTN:E199-200. [PMID: 23832506 DOI: 10.1055/s-0033-1344160] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- Y Nakagawa
- Department of Gastroenterology, Faculty of Medicine, Oita University, Yufu, Japan.
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Miguez PA, Terajima M, Nagaoka H, Ferreira JAR, Braswell K, Ko CC, Yamauchi M. Recombinant biglycan promotes bone morphogenetic protein-induced osteogenesis. J Dent Res 2014; 93:406-11. [PMID: 24482033 DOI: 10.1177/0022034514521237] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The aim of this study was to determine the effects of glutathione-S-transferase-fused recombinant biglycan (GST-BGN) on craniofacial bone regeneration. We recently demonstrated a positive effect of tissue-derived BGN on bone morphogenetic protein 2 (BMP-2) function, which is exerted likely via the BGN core protein. Here, we investigated the effects of GST-BGN lacking any posttranslational modifications on BMP-2 function in vitro and in vivo. In the C2C12 cell culture system, BMP-2-induced Smad 1/5/8 phosphorylation and alkaline phosphatase activity were both enhanced by the addition of GST-BGN. For the in vivo effect, we employed a Sprague-Dawley rat mandible defect model utilizing 1 µg (optimal) or 0.1 µg (suboptimal) of BMP-2 combined with 0, 2, 4, or 8 µg of GST-BGN. At 2 weeks post-surgery, newly formed bone was evaluated by microcomputed tomography and histologic analyses. The results revealed that the greatest amounts of bone within the defect were formed in the groups of suboptimal BMP-2 combined with 4 or 8 µg of GST-BGN. Also, bone was well organized versus that formed by the optimal dose of BMP. These results indicate that recombinant BGN is an efficient substrate to promote low-dose BMP-induced osteogenesis.
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Affiliation(s)
- P A Miguez
- North Carolina Oral Health Institute, The University of North Carolina at Chapel Hill, USA
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Yamauchi-Kawaura C, Yamauchi M, Imai K, Ikeda M, Aoyama T. Image quality and age-specific dose estimation in head and chest CT examinations with organ-based tube-current modulation. Radiat Prot Dosimetry 2013; 157:193-205. [PMID: 23734058 DOI: 10.1093/rpd/nct137] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The purpose of this study was to investigate the effects of an organ-based tube-current modulation (OBTCM) system on image quality and age-specific dose in head and chest CT examinations. Image noise, contrast-to-noise ratio (CNR) and image entropy were assessed using statistical and entropy analyses. Radiation doses for newborn, 6-y-old child and adult phantoms were measured with in-phantom dosimetry systems. The quality of CT images obtained with OBTCM was not different from that obtained without OBTCM. In head CT scans, the eye lens dose decreased by 20-33 % using OBTCM. In chest CT scans, breast dose decreased by 5-32 % using OBTCM. Posterior skin dose, however, increased by 11-20 % using OBTCM in head and chest CT scans. The reduction of effective dose using OBTCM was negligibly small. Detailed image quality and dose information provided in this study can be effectively used for OBTCM application.
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Affiliation(s)
- C Yamauchi-Kawaura
- Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
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Yamauchi M, Shinozaki K, Ikeda S, Nitta T, Doi M. Comparison Between Primary Tumor Resection and Primary Chemotherapy for Patients with Unresectable Colorectal Cancer. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt459.108] [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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Kanazawa I, Tanaka K, Ogawa N, Yamauchi M, Yamaguchi T, Sugimoto T. Undercarboxylated osteocalcin is positively associated with free testosterone in male patients with type 2 diabetes mellitus. Osteoporos Int 2013; 24:1115-9. [PMID: 22669468 DOI: 10.1007/s00198-012-2017-7] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Accepted: 04/09/2012] [Indexed: 11/26/2022]
Abstract
UNLABELLED Although a recent study showed that undercarboxylated osteocalcin (ucOC) is important for male fertility and testosterone production by testes, little is known about the relationship between ucOC and testosterone in humans. We found for the first time that ucOC is positively associated with free testosterone in men with type 2 diabetes. INTRODUCTION The ucOC has been shown to play a key role in energy metabolism as an endocrine hormone. Although a recent animal study demonstrated that ucOC is also important for male fertility and testosterone production by the testes, association between serum osteocalcin and testosterone levels has not been understood in humans. METHODS Sixty-nine male patients with type 2 diabetes were recruited and chemical bone markers [total osteocalcin (TOC), ucOC, bone-specific alkaline phosphatase (BAP), and urinary N-terminal cross-linked telopeptide of type I collagen (uNTX)], gonadotropic hormones [luteinizing hormone (LH) and follicle-stimulating hormone (FSH)], and free testosterone (FT) were measured. RESULTS Multiple regression analysis showed that ucOC and ucOC/TOC ratio were associated positively with FT and negatively with LH (for ucOC, β = 0.30, p = 0.042 and β = -0.52, p = 0.048; for ucOC/TOC ratio, β = 0.31, p = 0.031 and β = -0.54, p = 0.036, respectively) independently of age, duration of diabetes, body mass index, and hemoglobin A1c. ucOC and ucOC/TOC ratio were significantly associated with FT even after adjusting for LH and FSH (β = 0.24, p = 0.042 and β = 0.25, p = 0.031, respectively). However, neither TOC, BAP, nor uNTX was associated with the gonadotropic hormones or FT levels. CONCLUSIONS The present study indicates for the first time that ucOC is associated positively with FT and negatively with LH in type 2 diabetes. These findings support the recent evidence that ucOC is involved in testosterone production in male subjects.
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Affiliation(s)
- I Kanazawa
- Department of Internal Medicine 1, Shimane University Faculty of Medicine, 89-1 Enya-cho, Izumo, Shimane 693 8501, Japan.
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Yamauchi M, Shinozaki K, Doi M, Hamai K. Impressive Cases of Advanced Gastric Cancer Successfully Managed with Trastuzumab Containing Chemotherapy. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32455-8] [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: 10/25/2022] Open
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Hamai K, Shinozaki K, Okamoto Y, Yamauchi M, Doi M. Two Autopsy Cases of Cancer of Unknown Primary which were Needed to be Distinguished from Adrenal Cancer. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32524-2] [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: 11/28/2022] Open
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Yamauchi M, Lundin R, Woch J. The interplanetary magnetic fieldByeffects on large-scale field-aligned currents near local noon: Contributions from cusp part and noncusp part. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/92ja02934] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Adachi I, Aihara H, Asner DM, Aulchenko V, Aushev T, Aziz T, Bakich AM, Bay A, Bhardwaj V, Bhuyan B, Bischofberger M, Bondar A, Bozek A, Bračko M, Browder TE, Chen P, Cheon BG, Chilikin K, Chistov R, Cho K, Choi SK, Choi Y, Dalseno J, Danilov M, Doležal Z, Drásal Z, Eidelman S, Epifanov D, Fast JE, Gaur V, Gabyshev N, Garmash A, Goh YM, Golob B, Haba J, Hara K, Hara T, Hayasaka K, Hayashii H, Higuchi T, Horii Y, Hoshi Y, Hou WS, Hsiung YB, Hyun HJ, Iijima T, Ishikawa A, Itoh R, Iwabuchi M, Iwasaki Y, Iwashita T, Julius T, Kapusta P, Katayama N, Kawasaki T, Kichimi H, Kiesling C, Kim HJ, Kim HO, Kim JB, Kim JH, Kim KT, Kim YJ, Kinoshita K, Ko BR, Koblitz S, Kodyš P, Korpar S, Križan P, Krokovny P, Kuhr T, Kumar R, Kumita T, Kuzmin A, Kwon YJ, Lange JS, Lee SH, Li J, Li Y, Liu C, Liu Y, Liu ZQ, Liventsev D, Louvot R, Matvienko D, McOnie S, Miyabayashi K, Miyata H, Miyazaki Y, Mizuk R, Mohanty GB, Mori T, Muramatsu N, Nakano E, Nakao M, Nakazawa H, Neubauer S, Nishida S, Nishimura K, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen SL, Onuki Y, Ozaki H, Pakhlov P, Pakhlova G, Park HK, Park KS, Pedlar TK, Pestotnik R, Petrič M, Piilonen LE, Poluektov A, Röhrken M, Rozanska M, Sahoo H, Sakai K, Sakai Y, Sanuki T, Sato Y, Schneider O, Schwanda C, Schwartz AJ, Senyo K, Shebalin V, Shen CP, Shibata TA, Shiu JG, Shwartz B, Sibidanov A, Simon F, Singh JB, Smerkol P, Sohn YS, Sokolov A, Solovieva E, Stanič S, Starič M, Sumihama M, Sumisawa K, Sumiyoshi T, Tanaka S, Tatishvili G, Teramoto Y, Tikhomirov I, Trabelsi K, Tsuboyama T, Uchida M, Uehara S, Uglov T, Unno Y, Uno S, Ushiroda Y, Vahsen SE, Varner G, Varvell KE, Vinokurova A, Vorobyev V, Wang CH, Wang MZ, Wang P, Watanabe M, Watanabe Y, Williams KM, Won E, Yabsley BD, Yamamoto H, Yamashita Y, Yamauchi M, Yusa Y, Zhang ZP, Zhilich V, Zupanc A, Zyukova O. Precise measurement of the CP violation parameter sin2φ1 in B0→(cc¯)K0 decays. Phys Rev Lett 2012; 108:171802. [PMID: 22680852 DOI: 10.1103/physrevlett.108.171802] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Indexed: 06/01/2023]
Abstract
We present a precise measurement of the CP violation parameter sin2φ1 and the direct CP violation parameter A(f) using the final data sample of 772×10(6) BB[over ¯] pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. One neutral B meson is reconstructed in a J/ψK(S)(0), ψ(2S)K(S)(0), χ(c1)K(S)(0), or J/ψK(L)(0) CP eigenstate and its flavor is identified from the decay products of the accompanying B meson. From the distribution of proper-time intervals between the two B decays, we obtain the following CP violation parameters: sin2φ1=0.667±0.023(stat)±0.012(syst) and A(f)=0.006±0.016(stat)±0.012(syst).
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Affiliation(s)
- I Adachi
- High Energy Accelerator Research Organization (KEK), Tsukuba, Japan
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Bondar A, Garmash A, Mizuk R, Santel D, Kinoshita K, Adachi I, Aihara H, Arinstein K, Asner DM, Aushev T, Aziz T, Bakich AM, Barberio E, Belous K, Bhardwaj V, Bischofberger M, Bozek A, Bračko M, Browder TE, Chang MC, Chang P, Chen A, Cheon BG, Chilikin K, Chistov R, Cho IS, Cho K, Choi SK, Choi Y, Dalseno J, Danilov M, Doležal Z, Drutskoy A, Eidelman S, Epifanov D, Fast JE, Gaur V, Gabyshev N, Goh YM, Golob B, Haba J, Hara T, Hayasaka K, Hoshi Y, Hyun HJ, Iijima T, Inami K, Ishikawa A, Iwabuchi M, Iwasaki Y, Iwashita T, Julius T, Kang JH, Kawasaki T, Kichimi H, Kiesling C, Kim JB, Kim JH, Kim KT, Kim MJ, Kim YJ, Ko BR, Kobayashi N, Koblitz S, Kodyš P, Korpar S, Križan P, Kuhr T, Kumar R, Kumita T, Kuzmin A, Lange JS, Lee SH, Li J, Li Y, Libby J, Liu C, Liu ZQ, Liventsev D, Louvot R, Matvienko D, McOnie S, Miyata H, Miyazaki Y, Mohanty GB, Moll A, Muramatsu N, Mussa R, Nakao M, Natkaniec Z, Neubauer S, Niiyama M, Nishida S, Nishimura K, Nitoh O, Nozaki T, Olsen SL, Onuki Y, Pakhlov P, Pakhlova G, Park H, Park HK, Pedlar TK, Petrič M, Piilonen LE, Poluektov A, Prim M, Ritter M, Röhrken M, Ryu S, Sahoo H, Sakai Y, Santel D, Sanuki T, Schneider O, Schwanda C, Senyo K, Sevior ME, Shapkin M, Shebalin V, Shibata TA, Shiu JG, Shwartz B, Simon F, Smerkol P, Sohn YS, Sokolov A, Solovieva E, Starič M, Sumihama M, Sumiyoshi T, Tanaka S, Tatishvili G, Teramoto Y, Tikhomirov I, Uchida M, Uehara S, Uglov T, Ushiroda Y, Vahsen SE, Varner G, Vinokurova A, Wang CH, Wang MZ, Wang P, Wang XL, Watanabe Y, Williams KM, Won E, Yabsley BD, Yamashita Y, Yamauchi M, Yuan CZ, Yusa Y, Zhang ZP, Zhilich V, Zhulanov V, Zupanc A, Zyukova O. Observation of two charged bottomoniumlike resonances in Υ(5S) decays. Phys Rev Lett 2012; 108:122001. [PMID: 22540572 DOI: 10.1103/physrevlett.108.122001] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2011] [Indexed: 05/31/2023]
Abstract
We report the observation of two narrow structures in the mass spectra of the π(±)Υ(nS) (n=1, 2, 3) and π(±)h(b)(mP) (m=1, 2) pairs that are produced in association with a single charged pion in Υ(5S) decays. The measured masses and widths of the two structures averaged over the five final states are M(1)=(10,607.2±2.0) MeV/c2, Γ(1)=(18.4±2.4) MeV, and M(2)=(10,652.2±1.5) MeV/c2, Γ(2)=(11.5±2.2) MeV. The results are obtained with a 121.4 fb(-1) data sample collected with the Belle detector in the vicinity of the Υ(5S) resonance at the KEKB asymmetric-energy e+ e- collider.
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Affiliation(s)
- A Bondar
- Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090
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Imai K, Ikeda M, Kawaura C, Aoyama T, Enchi Y, Yamauchi M. Dose reduction and image quality in CT angiography for cerebral aneurysm with various tube potentials and current settings. Br J Radiol 2012; 85:e673-81. [PMID: 22253346 DOI: 10.1259/bjr/63268088] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES The purpose of this study is to investigate the image quality on both axial and three-dimensional CT angiograms of the brain at various tube potentials and currents, and to propose the use of descriptors for evaluating the image quality of three-dimensional CT angiograms using entropy analysis. METHODS A head phantom was used as a target object. Axial CT and three-dimensional CT angiograms were obtained at various effective milliampere-second values (49-350 mAs) and tube potentials (80-140 kVp) with a 64-row detector CT scanner. Lens doses were measured using a planar silicon pin-photodiode system. The signal-to-noise ratio (SNR) and streak artefacts on the axial CT angiograms were evaluated and the image quality of the three-dimensional CT angiograms was assessed using entropy analysis. RESULTS Lens doses increased with tube potential and effective milliampere-seconds. From the evaluation of SNR and streak artefacts on axial CT angiograms, we found that the image quality was improved by setting the tube potential at 100 kVp. However, there was little visual difference in the image quality for 100 kVp between 252 (effective value recommended by the manufacturer) and 350 mAs (maximum effective value). In the entropy analysis of the image quality of three-dimensional CT angiograms, the mutual information (information gain) per lens dose was largest at 80 kVp and 252 mAs. CONCLUSION Our results suggested that the suitable tube potentials for axial CT and three-dimensional CT angiograms were 100 and 80 kVp, respectively, and the effective milliampere-second value recommended by the manufacturer was appropriate.
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Affiliation(s)
- K Imai
- Department of Radiological Technology, Nagoya University School of Health Sciences, Nagoya, Japan.
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Nakagawa Y, Nagai T, Okawara H, Nakashima H, Hisamatsu A, Shuto M, Yamauchi M, Kai S, Yokoyama S, Murakami K, Fujioka T. Acute hemorrhagic colitis induced by the oral administration of oseltamivir used for influenza A treatment. Endoscopy 2011; 43 Suppl 2 UCTN:E261. [PMID: 21837605 DOI: 10.1055/s-0030-1256524] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [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: 12/10/2022]
Affiliation(s)
- Y Nakagawa
- Department of Gastroenterology, Oita Kouseiren Tsurumi Hospital, Beppu, Japan.
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Won E, Ko BR, Adachi I, Aihara H, Arinstein K, Asner DM, Aushev T, Bakich AM, Barberio E, Bay A, Bhardwaj V, Bhuyan B, Bischofberger M, Bondar A, Bozek A, Bračko M, Brodzicka J, Browder TE, Chang P, Chen A, Chen P, Cheon BG, Chilikin K, Cho IS, Cho K, Choi SK, Choi Y, Dalseno J, Danilov M, Doležal Z, Drásal Z, Drutskoy A, Eidelman S, Fast JE, Gaur V, Gabyshev N, Garmash A, Goh YM, Golob B, Haba J, Hara T, Hayasaka K, Hayashii H, Horii Y, Hoshi Y, Hou WS, Hsiung YB, Hyun HJ, Iijima T, Inami K, Ishikawa A, Itoh R, Iwabuchi M, Iwasaki Y, Iwashita T, Joshi NJ, Julius T, Kang JH, Katayama N, Kawasaki T, Kichimi H, Kim HJ, Kim HO, Kim JB, Kim JH, Kim KT, Kim MJ, Kim SK, Kim YJ, Kinoshita K, Kobayashi N, Koblitz S, Kodyš P, Korpar S, Križan P, Kumita T, Kuzmin A, Kwon YJ, Lange JS, Lee MJ, Lee SH, Li J, Li Y, Libby J, Lim CL, Liu C, Liu Y, Liventsev D, Louvot R, McOnie S, Miyabayashi K, Miyata H, Miyazaki Y, Mizuk R, Mohanty GB, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Neubauer S, Nishida S, Nishimura K, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen SL, Onuki Y, Pakhlov P, Pakhlova G, Park H, Park HK, Park KS, Pestotnik R, Petrič M, Piilonen LE, Röhrken M, Ryu S, Sahoo H, Sakai K, Sakai Y, Sanuki T, Schneider O, Schwanda C, Schwartz AJ, Senyo K, Seon O, Sevior ME, Shen CP, Shibata TA, Shiu JG, Simon F, Singh JB, Smerkol P, Sohn YS, Sokolov A, Solovieva E, Stanič S, Starič M, Sumihama M, Sumiyoshi T, Suzuki S, Tatishvili G, Teramoto Y, Trabelsi K, Uchida M, Uehara S, Uglov T, Unno Y, Uno S, Usov Y, Vahsen SE, Varner G, Vinokurova A, Wang CH, Wang MZ, Wang P, Watanabe M, Watanabe Y, Williams KM, Yabsley BD, Yamashita Y, Yamauchi M, Zhang ZP, Zhilich V, Zhulanov V, Zupanc A, Zyukova O. Observation of D+ → K(+)η(') and search for CP violation in D+ → π(+)η(') decays. Phys Rev Lett 2011; 107:221801. [PMID: 22182020 DOI: 10.1103/physrevlett.107.221801] [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: 07/04/2011] [Indexed: 05/31/2023]
Abstract
We report the first observation of the doubly Cabibbo-suppressed decays D(+)→K(+)η((')) using a 791 fb(-1) data sample collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The ratio of the branching fractions of doubly Cabibbo-suppressed relative to singly Cabibbo-suppressed D(+)→π(+)η((')) decays are B(D(+)→K(+)η)/B(D(+)→π(+)η)=(3.06±0.43±0.14)% and B(D(+)→K(+)η')/B(D(+)→π(+)η')=(3.77±0.39±0.10)%. From these, we find that the relative final-state phase difference between the tree and annihilation amplitudes in D(+) decays, δ(TA), is (72±9)° or (288±9)°. We also report the most precise measurements of CP asymmetries to date: A(CP)(D(+)→π(+)η)=(+1.74±1.13±0.19)% and A(CP)(D(+)→π(+)η')=(-0.12±1.12±0.17)%.
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Fujii K, Akahane K, Miyazaki O, Horiuchi T, Shimada A, Nagmatsu H, Yamauchi M, Yamauchi-Kawaura C, Kawasaki T. Evaluation of organ doses in CT examinations with an infant anthropomorphic phantom. Radiat Prot Dosimetry 2011; 147:151-155. [PMID: 21743079 DOI: 10.1093/rpd/ncr289] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The aim of this study is to evaluate organ doses in infant CT examinations with multi-detector row CT scanners. Radiation doses were measured with radiophotoluminescence glass dosemeters set in various organ positions within a 1-y-old child anthropomorphic phantom and organ doses were evaluated from the measurement values. Doses for tissues or organs within the scan range were 28-36 mGy in an infant head CT, 3-11 mGy in a chest CT, 5-11 mGy in an abdominal-pelvic CT and 2-14 mGy in a cardiac CT. The doses varied by the differences in the types of CT scanners and scan parameters used at each medical facility. Compared with those for children of various ages, the doses in an infant CT protocol were found to be similar to or slightly smaller than those in a paediatric CT for 5- or 6-y-old children.
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Affiliation(s)
- K Fujii
- Department of Radiation, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, Japan.
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Boushell LW, Nagaoka H, Nagaoka H, Yamauchi M. Increased matrix metalloproteinase-2 and bone sialoprotein response to human coronal caries. Caries Res 2011; 45:453-9. [PMID: 21876355 DOI: 10.1159/000330601] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2010] [Accepted: 06/28/2011] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND It has been suggested that host matrix metalloproteinase-2 (MMP-2) present in dentin may be involved in caries progression, however, its response to caries is not known. Bone sialoprotein (BSP) has been implicated in dentin mineralization and MMP-2 modulation. OBJECTIVE To identify and compare the distribution of MMP-2 and BSP in healthy human coronal dentin and those with early caries. METHODS Freshly extracted 3rd molars and premolars with and without early caries were fixed, demineralized and subjected to immunohistochemistry using a monoclonal anti-MMP-2 antibody and monoclonal anti-BSP antibody with an avidin-biotin complex method. Immunoreactivity was visualized with 3,3'-diaminobenzidine substrate and observed under light microscopy. RESULTS Immunohistochemical analysis revealed that MMP-2 and BSP are not detected in the tubule lumens of healthy dentin. However, intense immunoreactivity for MMP-2 and BSP was detected in association with the full length of the caries-affected dentinal tubules. The MMP-2 and BSP at the dentino-enamel junction appeared unaltered. CONCLUSION The results indicate that MMP-2 and BSP may be actively secreted by odontoblasts in response to carious insult. MMP-2 and BSP accumulation in the caries-affected dentinal tubules may indicate their potential involvement in the host defense mechanism which results in calcification of regions affected by the carious process.
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Affiliation(s)
- L W Boushell
- Department of Operative Dentistry, University of North Carolina, Chapel Hill, NC 27599, USA.
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Nakagawa Y, Nagai T, Okawara H, Nakashima H, Hisamatsu A, Syutou M, Yamauchi M, Kai S, Nakayama T, Yokoyama S, Murakami K, Fujioka T. Minute primary extramedullary plasmacytomas of the large intestine. Endoscopy 2011; 43 Suppl 2 UCTN:E105-6. [PMID: 21424997 DOI: 10.1055/s-0030-1256138] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [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: 12/27/2022]
Affiliation(s)
- Y Nakagawa
- Department of Gastroenterology, Oita Kouseiren Tsurumi Hospital, Tsurumi, Beppu, Japan.
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Ko BR, Won E, Arinstein K, Aushev T, Bakich AM, Balagura V, Barberio E, Belous K, Bhardwaj V, Bhuyan B, Bischofberger M, Bondar A, Bozek A, Bračko M, Brodzicka J, Browder TE, Chen A, Chen P, Cheon BG, Chiang CC, Cho IS, Cho K, Choi KS, Choi SK, Choi Y, Eidelman S, Epifanov D, Feindt M, Gabyshev N, Garmash A, Golob B, Ha H, Haba J, Hayashii H, Horii Y, Hoshi Y, Hou WS, Hyun HJ, Iijima T, Inami K, Ishikawa A, Itoh R, Iwabuchi M, Iwashita T, Julius T, Kang JH, Kawasaki T, Kiesling C, Kim HO, Kim MJ, Kim YJ, Kinoshita K, Kodyš P, Korpar S, Križan P, Kumar R, Kuzmin A, Kwon YJ, Kyeong SH, Lee MJ, Lee SH, Liu C, Liventsev D, Louvot R, Matyja A, Miyabayashi K, Miyata H, Miyazaki Y, Mizuk R, Mohanty GB, Mori T, Nakano E, Nakao M, Nishida S, Nishimura K, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen SL, Pakhlov P, Park CW, Park H, Park HK, Pestotnik R, Petrič M, Piilonen LE, Poluektov A, Röhrken M, Sakai Y, Schneider O, Schwanda C, Schwartz AJ, Senyo K, Sevior ME, Shapkin M, Shebalin V, Shen CP, Shiu JG, Shwartz B, Simon F, Singh JB, Smerkol P, Sohn YS, Solovieva E, Stanič S, Starič M, Sumihama M, Sumisawa K, Sumiyoshi T, Tanaka S, Teramoto Y, Trabelsi K, Uchida M, Uehara S, Uglov T, Unno Y, Usov Y, Varner G, Varvell KE, Vinokurova A, Wang CH, Wang MZ, Watanabe Y, Yamashita Y, Yamauchi M, Zhang ZP, Zhilich V, Zhulanov V, Zupanc A, Zyukova O. Search for CP violation in the decays D(0)→K(S)(0)P(0). Phys Rev Lett 2011; 106:211801. [PMID: 21699287 DOI: 10.1103/physrevlett.106.211801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2011] [Indexed: 05/31/2023]
Abstract
We have searched for CP violation in the decays D(0)→K(S)(0)P(0) where P(0) denotes a neutral pseudoscalar meson that is either a π(0), η, or η' using KEKB asymmetric-energy e(+)e(-) collision data corresponding to an integrated luminosity of 791 fb(-1) collected with the Belle detector. No evidence of significant CP violation is observed. We report the most precise CP asymmetry measurement in the decay D(0)→K(S)(0)π(0) to date: A(CP)(D(0)→K(S)(0)π(0))=(-0.28±0.19±0.10)%. We also report the first measurements of CP asymmetries in the decays D(0)→K(S)(0)η and D(0)→K(S)(0)η': A(CP)(D(0)→K(S)(0)η)=(+0.54±0.51±0.16)% and A(CP)(D(0)→K(S)(0)η')=(+0.98±0.67±0.14)%, respectively.
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Yamauchi-Kawara C, Fujii K, Aoyama T, Yamauchi M, Koyama S. Radiation dose evaluation in multidetector-row CT imaging for acute stroke with an anthropomorphic phantom. Br J Radiol 2011; 83:1029-41. [PMID: 21088088 DOI: 10.1259/bjr/52267127] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
This study evaluated radiation dose and dose reduction in CT imaging for acute stroke. Radiation doses in three types of CT imaging (i.e. non-contrast-enhanced CT, CT perfusion (CTP) and CT angiography (CTA)) were measured with an in-phantom dosimetry system for 4-, 16- and 64-detector CT scanners in 5 hospitals. To examine the relationship between image quality and radiation dose in CTA, image contrast-to-noise ratio was evaluated. Doses to the brain, lens, salivary glands and local skin obtained with scan protocols in routine use were: 42-71 mGy, 30-88 mGy, 3.9-7.3 mGy and 40-97 mGy in non-contrast-enhanced CT; 41-75 mGy, 9.9-10 mGy, 1.5-2.1 mGy and 107-143 mGy in CTP; and 8.2-55 mGy, 26-69 mGy, 2.0-73 mGy and 32-72 mGy in CTA. For the combination of these CT examinations, on average a patient would receive 236 mGy for the maximum local skin dose and 4.2 mSv for the effective dose evaluated by the International Commission on Radiological Protection (ICRP) 103. Effective doses in CTP in this study were less than those obtained with representative protocols of Western countries. Average effective doses in each CT examination were not more than 1.5 mSv. The use of reduced kV and a narrow scan range would be effective in dose reduction of CTA and CTP, and intermittent scanning would be essential in CTP. Although lens and maximum local skin doses were far less than the thresholds for deterministic effects, since radiation risks would be increased in repeated CT examinations, efforts should be devoted to dose reduction in stroke CT examinations.
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Suzuki K, Yamauchi M, Yamashita S. ATM-dependent cellular response to DNA double strand breaks plays a pivotal role in the maintenance of the integrity of the genome. Radiat Prot Dosimetry 2011; 143:279-283. [PMID: 21224259 DOI: 10.1093/rpd/ncq533] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
ATM-dependent cellular response to DNA double strand breaks plays a pivotal role in the maintenance of the integrity of the genome. Upon irradiation, activated ataxia-telangiectasia mutated (ATM) proteins phosphorylate various downstream mediators and effectors, such as histone H2AX, MDC1, 53BP1 and NBS1. These proteins create discrete foci within the nuclei, which are detectable under fluorescence microscopes. Interestingly, the size of the foci is also increasing as increasing the time after irradiation. Particularly, the residual foci form large foci, the sizes of which reach approximately 2 μm in diameter. We confirmed that such 'foci growth' is a mechanism, by which DNA damage signal is amplified. Especially, a proper DNA damage response of cells to lower doses of ionising radiation required amplification of the ATM-dependent damage signal by recruiting the DNA damage checkpoint factors to the site of chromatin.
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Affiliation(s)
- K Suzuki
- Atomic Bomb Disease Institute, Graduate School of Biomedical Sciences, Nagasaki University, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan.
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Nagamatsu A, Murakami K, Yokota A, Yamazaki J, Yamauchi M, Kitajo K, Kumagai H, Tawara H. Space radiation damage to HDTV camera CCDs onboard the international space station. RADIAT MEAS 2011. [DOI: 10.1016/j.radmeas.2010.11.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Kanazawa I, Yamaguchi T, Yamauchi M, Yamamoto M, Kurioka S, Yano S, Sugimoto T. Serum undercarboxylated osteocalcin was inversely associated with plasma glucose level and fat mass in type 2 diabetes mellitus. Osteoporos Int 2011; 22:187-94. [PMID: 20165834 DOI: 10.1007/s00198-010-1184-7] [Citation(s) in RCA: 171] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2009] [Accepted: 12/17/2009] [Indexed: 12/13/2022]
Abstract
UNLABELLED Although recent animal studies have shown that undercarboxylated osteocalcin acts as a hormone regulating glucose metabolism and fat mass, little is known about the relationships in humans. We reported here for the first time that undercarboxylated osteocalcin were associated with glucose/fat metabolism in patients with type 2 diabetes. INTRODUCTION Recent studies have shown that undercarboxylated osteocalcin (ucOC) acts as a hormone regulating glucose metabolism and fat mass. We investigated the relationship between ucOC as well as other bone turnover markers [serum OC, bone-specific alkaline phosphatase (BAP), and urinary N-terminal cross-linked telopeptide of type-I collagen] versus serum levels of glucose, fasting serum C-peptide, and adiponectin as well as the amount of fat mass in type 2 diabetes. METHODS A total of 180 men and 109 postmenopausal women were consecutively recruited, and radiographic and biochemical characteristics were collected. Fat mass was measured by dual X-ray absorptiometry (DXA) and computed tomography (CT). RESULTS In men, ucOC negatively correlated with percent trunk fat (%trunk fat; by DXA) and visceral/subcutaneous fat ratio (by CT) as well as fasting plasma glucose and HbA(1c) (at least p < 0.05). Multiple regression analysis showed that these associations were still significant independent of age, duration of diabetes, body stature, and renal function as well as glucose or fat metabolism, whereas BAP, another bone formation marker, did not correlate with any variable. On the other hand, although ucOC also negatively correlated with %fat and %trunk fat as well as HbA(1c) (at least p < 0.05) in postmenopausal women, we found no significant association in multiple regression analysis. CONCLUSIONS These findings suggest that ucOC is associated with plasma glucose level and fat mass in men with type 2 diabetes.
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Affiliation(s)
- I Kanazawa
- Department of Internal Medicine 1, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo, Shimane, 693-8501, Japan.
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Kanazawa I, Yamaguchi T, Yano S, Yamamoto M, Yamauchi M, Kurioka S, Sugimoto T. Baseline atherosclerosis parameter could assess the risk of bone loss during pioglitazone treatment in type 2 diabetes mellitus. Osteoporos Int 2010; 21:2013-8. [PMID: 20130841 DOI: 10.1007/s00198-009-1161-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2009] [Accepted: 12/07/2009] [Indexed: 10/19/2022]
Abstract
SUMMARY We found that serum osteocalcin, femoral bone mineral density (F-BMD), and 1/3R-BMD were decreased during pioglitazone treatment in patients with type 2 diabetes. Moreover, baseline atherosclerosis parameter, serum insulin-like growth factor-I (IGF-I), and urinary N-terminal cross-linked telopeptide of type I collagen (uNTX) values were associated with changes in bone mineral density (BMD). Therefore, these parameters could assess the risk of BMD reduction in patients treated with pioglitazone. INTRODUCTION The aim of this study was to investigate the effects of pioglitazone or metformin on bone mass and atherosclerosis in patients with type 2 diabetes. METHODS A total of 55 Japanese patients were enrolled in this 1-year open-label study and randomized to either pioglitazone (n = 22, 15-30 mg/day) or metformin (n = 23, 500-750 mg/day) groups. BMD at the lumbar spine, femoral neck (F), and one third of the radius (1/3R), bone markers, and atherosclerosis parameters were measured. RESULTS In the pioglitazone group, serum osteocalcin significantly decreased at 6 months (p < 0.05), although it almost recovered to baseline level at 12 months. F-BMD significantly decreased at 6 months (p < 0.05), and 1/3R-BMD significantly decreased at 6 and 12 months (p < 0.05), while bone markers or BMD at any site were not changed in the metformin group. Although atherosclerosis parameters were not changed in the pioglitazone group, intima-media thickness (IMT)-mean significantly increased at 6 months (p < 0.05) and plaque score significantly increased at 6 and 12 months (p < 0.01) in the metformin group. In the pioglitazone group, %changes in F-BMD were significantly and negatively correlated with baseline IMT-Max, IMT-mean, and plaque scores (r = -0.61, p < 0.01; r = -0.71, p < 0.01; and r = -0.68, p < 0.01, respectively), and %changes in 1/3R-BMD were significantly and negatively correlated with baseline uNTX and IMT-Max (r = -0.57, p < 0.01 and r = -0.48, p < 0.05, respectively) and positively with IGF-I (r = 0.45, p < 0.05). CONCLUSIONS Baseline IMT, uNTX, and IGF-I could assess the risk of BMD reduction in diabetic patients treated with pioglitazone.
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Affiliation(s)
- I Kanazawa
- Department of Internal Medicine 1, Shimane University Faculty of Medicine, 89-1 Enya-cho, Izumo, Shimane, 693-8501, Japan.
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Nishimura K, Browder TE, Adachi I, Aihara H, Arinstein K, Aushev T, Bakich AM, Balagura V, Barberio E, Belous K, Bhardwaj V, Bischofberger M, Bondar A, Bozek A, Bračko M, Chang MC, Chao Y, Chen A, Chen KF, Chen P, Cheon BG, Chiang CC, Cho IS, Choi Y, Dalseno J, Danilov M, Doležal Z, Drutskoy A, Eidelman S, Gabyshev N, Golob B, Ha H, Haba J, Hara T, Hayasaka K, Hayashii H, Horii Y, Hoshi Y, Hou WS, Hyun HJ, Iijima T, Inami K, Itoh R, Iwabuchi M, Iwasaki Y, Joshi NJ, Julius T, Kang JH, Kapusta P, Kawai H, Kawasaki T, Kichimi H, Kiesling C, Kim HJ, Kim HO, Kim MJ, Kim YJ, Kinoshita K, Ko BR, Kodyš P, Korpar S, Križan P, Kumita T, Kuzmin A, Kwon YJ, Kyeong SH, Lange JS, Lee MJ, Lee SH, Li J, Liu C, Liu Y, Liventsev D, Louvot R, Matyja A, McOnie S, Miyabayashi K, Miyata H, Miyazaki Y, Mohanty GB, Mori T, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Ogawa S, Ohshima T, Olsen SL, Ostrowicz W, Pakhlova G, Park CW, Park H, Park HK, Park KS, Pestotnik R, Petrič M, Piilonen LE, Röhrken M, Ryu S, Sahoo H, Sakai Y, Schneider O, Schwanda C, Schwartz AJ, Senyo K, Seon O, Sevior ME, Shapkin M, Shen CP, Shiu JG, Simon F, Smerkol P, Sokolov A, Solovieva E, Starič M, Sumiyoshi T, Suzuki S, Teramoto Y, Trabelsi K, Uehara S, Uglov T, Unno Y, Uno S, Varner G, Varvell KE, Vervink K, Wang CH, Wang MZ, Wang P, Watanabe Y, Wicht J, Williams KM, Won E, Yamashita Y, Yamauchi M, Zhang CC, Zhang ZP, Zhou P, Zhulanov V, Zivko T, Zupanc A, Zyukova O. First measurement of inclusive B→Xsη decays. Phys Rev Lett 2010; 105:191803. [PMID: 21231162 DOI: 10.1103/physrevlett.105.191803] [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: 08/19/2010] [Indexed: 05/30/2023]
Abstract
We report a first measurement of inclusive B→Xsη decays, where Xs is a charmless state with unit strangeness. The measurement is based on a pseudoinclusive reconstruction technique and uses a sample of 657×10(6)BB pairs accumulated with the Belle detector at the KEKB e+e- collider. For MXs < 2.6 GeV/c2, we measure a branching fraction of [26.1±3.0(stat)-2.1+1.9(syst)-7.1+4.0(model)]×10(-5) and a direct CP asymmetry of ACP=-0.13±0.04-0.03+0.02. Over half of the signal occurs in the range MXs > 1.8 GeV/c2.
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Affiliation(s)
- K Nishimura
- University of Hawaii, Honolulu, Hawaii 96822, USA
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Ishikawa M, Kondoh T, Ookawa K, Fujita K, Yamauchi M, Hayakawa A, Nishitani T, Kusama Y. Development of in-vessel components of the microfission chamber for ITER. Rev Sci Instrum 2010; 81:10D308. [PMID: 21033834 PMCID: PMC2973982 DOI: 10.1063/1.3485080] [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] [Received: 05/17/2010] [Accepted: 07/26/2010] [Indexed: 05/30/2023]
Abstract
Microfission chambers (MFCs) will measure the total neutron source strength in ITER. The MFCs will be installed behind blanket modules in the vacuum vessel (VV). Triaxial mineral insulated (MI) cables will carry signals from the MFCs. The joint connecting triaxial MI cables in the VV must be considered because the MFCs and the MI cables will be installed separately at different times. Vacuum tight triaxial connector of the MI cable has been designed and a prototype has been constructed. Performance tests indicate that the connector can be applied to the ITER environment. A small bending-radius test of the MI cable indicates no observed damage at a curvature radius of 100 mm.
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Affiliation(s)
- M Ishikawa
- Japan Atomic Energy Agency, 801-1, Mukoyama, Naka 311-0193, Japan.
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