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Lo Piccolo L, Umegawachi T, Yeewa R, Potikanond S, Nimlamool W, Prachayasittikul V, Gotoh Y, Yoshida H, Yamaguchi M, Jantrapirom S. A Novel Drosophila-based Drug Repurposing Platform Identified Fingolimod As a Potential Therapeutic for TDP-43 Proteinopathy. Neurotherapeutics 2023; 20:1330-1346. [PMID: 37493896 PMCID: PMC10480388 DOI: 10.1007/s13311-023-01406-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2023] [Indexed: 07/27/2023] Open
Abstract
Pathogenic changes to TAR DNA-binding protein 43 (TDP-43) leading to alteration of its homeostasis are a common feature shared by several progressive neurodegenerative diseases for which there is no effective therapy. Here, we developed Drosophila lines expressing either wild type TDP-43 (WT) or that carrying an Amyotrophic Lateral Sclerosis /Frontotemporal Lobar Degeneration-associating G384C mutation that recapitulate several aspects of the TDP-43 pathology. To identify potential therapeutics for TDP-43-related diseases, we implemented a drug repurposing strategy that involved three consecutive steps. Firstly, we evaluated the improvement of eclosion rate, followed by the assessment of locomotive functions at early and late developmental stages. Through this approach, we successfully identified fingolimod, as a promising candidate for modulating TDP-43 toxicity. Fingolimod exhibited several beneficial effects in both WT and mutant models of TDP-43 pathology, including post-transcriptional reduction of TDP-43 levels, rescue of pupal lethality, and improvement of locomotor dysfunctions. These findings provide compelling evidence for the therapeutic potential of fingolimod in addressing TDP-43 pathology, thereby strengthening the rationale for further investigation and consideration of clinical trials. Furthermore, our study demonstrates the utility of our Drosophila-based screening pipeline in identifying novel therapeutics for TDP-43-related diseases. These findings encourage further scale-up screening endeavors using this platform to discover additional compounds with therapeutic potential for TDP-43 pathology.
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Affiliation(s)
- Luca Lo Piccolo
- Center of Multidisciplinary Technology for Advanced Medicine (CMUTEAM), Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
- Faculty of Medicine, Musculoskeletal Science and Translational Research Centre (MSTR), Chiang Mai University, Chiang Mai, Thailand
| | | | - Ranchana Yeewa
- Center of Multidisciplinary Technology for Advanced Medicine (CMUTEAM), Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Saranyapin Potikanond
- Department of Pharmacology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Wutigri Nimlamool
- Department of Pharmacology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Virapong Prachayasittikul
- Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Chiang Mai, Thailand
| | - Yusuke Gotoh
- Platform Technology Research Unit, Sumitomo Pharma Co., Ltd, Kyoto, Japan
| | - Hideki Yoshida
- Department of Applied Biology, Kyoto Institute of Technology, Kyoto, Japan
| | | | - Salinee Jantrapirom
- Department of Pharmacology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
- Drosophila Centre for Human Diseases and Drug Discovery (DHD), Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
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Gotoh Y, Kotani T. An evaluation environment for high-performance computing combining supercomputing and cloud. IJGUC 2023. [DOI: 10.1504/ijguc.2023.10054822] [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: 03/19/2023]
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Mieno Y, Hayashi M, Hirochi M, Ikeda A, Kako H, Ina T, Maeda Y, Maeda S, Inoue T, Souma T, Watanabe T, Horiguchi T, Gotoh Y, Niwa Y, Yamatsuta K, Morikawa S, Sakakibara Y, Okamura T, Uozu S, Goto Y, Isogai S, Fujita S, Fukumoto J, Hosoda N, Imaizumi K. Availability of Home sleep apnea test equipment LS-140 on a comparison with Polysomnography. Fujita Med J 2022; 8:17-24. [PMID: 35233343 PMCID: PMC8874914 DOI: 10.20407/fmj.2020-014] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 10/30/2020] [Indexed: 11/18/2022]
Abstract
OBJECTIVE The prevalence of obstructive sleep apnea (OSA) in Japan is 9% among males and 3% among females. Up to 2.5 million patients are estimated to suffer from the disease, but limited number of facilities are capable of carrying out polysomnography (PSG), leaving more than 80% of these individuals are undiagnosed. In recent years, the development of new portable sleep monitoring (PMs) devices has been remarkable. We evaluate the correlation between the results of the LS-140 PMs device (Fukuda Denshi Tech Co. Ltd.), released in 2017, and those of PSG. METHODS We obtained contemporaneous data from the same patients by equipping 58 patients with PMs (LS-140) devices while they underwent PSG. Our primary outcome was Case 2 of the intraclass correlation coefficient (ICC), i.e., the ICC (2.1). And we used a Bland-Altman analysis to compare the apnea-hypopnea index (AHI) given by PSG and the respiratory event index (REI) given by LS-140 and examined the sensitivity and specificity of the REI relative to the AHI in the diagnosis of OSA. We also carried out the same comparison but in terms of the presence or absence of periodic limb movements (PLMs). RESULTS The ICC (2.1) between The REI and the AHI was 0.944, a rather high value (p<0.0001). The mean difference between AHI and REI values was -3.6 (p<0.0001), indicating a negative fixed bias. Sensitivity may decrease in groups with PLMs. CONCLUSION The REI and the AHI are highly correlated, giving LS-140 sufficient diagnostic sensitivity and specificity to screen for OSA.
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Affiliation(s)
- Yuki Mieno
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Masamichi Hayashi
- Fujita Health University Okazaki Medical Center, Okazaki, Aichi, Japan
| | - Mariko Hirochi
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Aki Ikeda
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Hisashi Kako
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Takuma Ina
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Yuri Maeda
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Shingo Maeda
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Takahiro Inoue
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Tomohide Souma
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Toshikazu Watanabe
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Tomoya Horiguchi
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Yusuke Gotoh
- Fujita Health University Okazaki Medical Center, Okazaki, Aichi, Japan
| | - Yoshikazu Niwa
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Kumiko Yamatsuta
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Sayako Morikawa
- Fujita Health University Okazaki Medical Center, Okazaki, Aichi, Japan
| | - Yosuke Sakakibara
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Takuya Okamura
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Sakurako Uozu
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Yasuhiro Goto
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Sumito Isogai
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Shiho Fujita
- Fujita Health University Clinical Laboratory Center, Toyoake, Aichi, Japan
| | - Junichi Fukumoto
- Fujita Health University Clinical Laboratory Center, Toyoake, Aichi, Japan
| | - Nami Hosoda
- Fujita Health University Clinical Laboratory Center, Toyoake, Aichi, Japan
| | - Kazuyoshi Imaizumi
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
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Gotoh Y, Yamaguchi T, Yatsuya H, Ikeda A, Okamura T, Sakakibara Y, Ina T, Maeda Y, Hirochi M, Kako H, Goto Y, Isogai S, Yamamoto N, Kondo M, Imaizumi K. Predictive risk factors for pneumothorax after transbronchial biopsy using endobronchial ultrasonography with a guide sheath. BMC Pulm Med 2021; 21:181. [PMID: 34051763 PMCID: PMC8164257 DOI: 10.1186/s12890-021-01551-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 05/17/2021] [Indexed: 11/18/2022] Open
Abstract
Background Pneumothorax is one complication of transbronchial biopsy (TBB) using endobronchial ultrasonography with a guide sheath (EBUS-GS-TBB). We sought to clarify the risk factors for pneumothorax after EBUS-GS-TBB under fluoroscopic guidance. Methods We retrospectively reviewed data from 916 patients who underwent EBUS-GS-TBB at Fujita Health University Hospital. We evaluated the following risk factors for pneumothorax after EBUS-GS-TBB: patient characteristics (sex, age, and pulmonary comorbidities); lesion data (location, size, existence of ground-glass opacities [GGOs], pleural involvement, computed tomography [CT] bronchus sign, visibility on fluoroscopy, and EBUS findings); final diagnosis; years of bronchoscopist experience; and guide sheath size. Univariate and multivariate logistic regression analyses were performed. Results Among the 916 patients, 30 (3.28%) presented with pneumothorax. With a univariate analysis, factors that independently predisposed to pneumothorax included lesions containing GGOs, lesions in sagittal lung segments on fluoroscopy, lesions that were not visible on fluoroscopy, and infectious lesions. A univariate analysis also showed that lesions in the right upper lobe or left upper division, as well as malignant lesions, were less likely to lead to pneumothorax. Age, underlying pulmonary disease, CT bronchus sign, EBUS findings, bronchoscopist experience, and guide sheath size did not influence the incidence of pneumothorax. A multivariate analysis revealed that only lesions containing GGOs (odds ratio [OR] 6.47; 95% confidence interval [CI] 2.13–19.6, P = 0.001) and lesions in lung segments with a sagittal orientation on fluoroscopy (OR 2.47; 95% CI 1.09–5.58, P = 0.029) were significant risk factors for EBUS-GS-TBB-related pneumothorax. Conclusions EBUS-GS-TBB of lesions containing GGOs or lesions located in sagittal lung segments on fluoroscopy correlate with a higher pneumothorax risk.
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Affiliation(s)
- Yusuke Gotoh
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Teppei Yamaguchi
- Department of Thoracic Oncology, Aichi Cancer Center Hospital, 1-1 Kanokoden, Chikusa-ku, Nagoya, Japan
| | - Hiroshi Yatsuya
- Department of Public Health and Health Systems, Graduate School of Medicine, Nagoya University, 65 Tsurumai-cho, Nagoya, Japan
| | - Aki Ikeda
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Takuya Okamura
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Yosuke Sakakibara
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Takuma Ina
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Yuri Maeda
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Mariko Hirochi
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Hisashi Kako
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Yasuhiro Goto
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Sumito Isogai
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Naoki Yamamoto
- Department of Ophthalmology, Kanazawa Medical University, Ishikawa, Japan
| | - Masashi Kondo
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Kazuyoshi Imaizumi
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
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Gotoh Y, Fujita T. Design and implementation of broadcasting system for selective contents considering interruption time. IJGUC 2020. [DOI: 10.1504/ijguc.2020.10028893] [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: 11/21/2022]
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Hayashi M, Yamamoto N, Hiramatsu N, Isogai S, Gotoh Y, Goto Y, Kondo M, Imaizumi K. A basic study on self-reconstitution of alveolar epithelium-like cells by tissue stem cells in mouse lung. In Vitro Cell Dev Biol Anim 2018; 54:648-657. [PMID: 30145679 DOI: 10.1007/s11626-018-0287-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 07/27/2018] [Indexed: 11/28/2022]
Abstract
In recent research on regenerative medicine, three-dimensional (3D) tissue reconstruction using the induced pluripotent stem cell (iPS cell) differentiated cells has attracted attention. In this study, mouse lungs at 1.5, 10, and 20 d old were subjected to enzyme treatment, and aggregates formed in serum-free suspension culture (3D-culture) were observed. The number of aggregates formed was the highest in 1.5 d. The cell aggregates in which the interior of the aggregate is filled and form small vacuoles and the organoid-like aggregates having a relatively large vacuole inside and forming the alveolar-like structure were observed. At 1.5 d, the formation ratio of the organoid-like aggregates was the highest and aggregate size was small at 20 d. For the cell aggregates derived from 1.5 d, positive cells of SSEA-1, CD29, CD90, CD105, alveolar epithelial stem cell marker of SP-C, and Sca-1 were observed in the center. In the cell aggregates derived from 10 d, the expression level of 1.5 d each protein markers and OCT4 gene of transcription factor was decreased, and furthermore, markers were hardly observed in the organoid-like aggregates derived from 10 d. In addition, cells surrounding the vacuole of organoid-like aggregate obtained over 10 d differentiated into periodic acid-Schiff (PAS), podoplanin-positive cells. When the formed cell aggregates were dispersed, cell aggregates and organoid-like aggregates were reformed. Comparing 3D-culture and adhesion culture (2D-culture), SP-C expression of 10 d of cells was maintained. Expression of markers of undifferentiated markers and alveolar tissue stem cells decreased when cell aggregates were cultured with the addition of fetal bovine serum.
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Affiliation(s)
- Masamichi Hayashi
- Department of Respiratory Medicine, School of Medicine, Fujita Health University, Toyoake, Aichi, 470-1192, Japan
| | - Naoki Yamamoto
- Regenerative Medicine Support Promotion Facility, Center for Research Promotion and Support, Fujita Health University, Toyoake, Aichi, 470-1192, Japan. .,Laboratory of Molecular Biology, Joint Research Support Promotion Facility, Center for Research Promotion and Support, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
| | - Noriko Hiramatsu
- Department of Respiratory Medicine, School of Medicine, Fujita Health University, Toyoake, Aichi, 470-1192, Japan
| | - Sumito Isogai
- Department of Respiratory Medicine, School of Medicine, Fujita Health University, Toyoake, Aichi, 470-1192, Japan
| | - Yusuke Gotoh
- Department of Respiratory Medicine, School of Medicine, Fujita Health University, Toyoake, Aichi, 470-1192, Japan
| | - Yasuhiro Goto
- Department of Respiratory Medicine, School of Medicine, Fujita Health University, Toyoake, Aichi, 470-1192, Japan
| | - Masashi Kondo
- Department of Respiratory Medicine, School of Medicine, Fujita Health University, Toyoake, Aichi, 470-1192, Japan
| | - Kazuyoshi Imaizumi
- Department of Respiratory Medicine, School of Medicine, Fujita Health University, Toyoake, Aichi, 470-1192, Japan
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Yamaguchi T, Gotoh Y, Hattori H, Katsuno H, Imaizumi K. Gastrointestinal perforation during treatment with erlotinib plus bevacizumab in two patients with non-small cell lung cancer exhibiting epidermal growth factor receptor mutations: A case report. Oncol Lett 2018; 16:1046-1050. [PMID: 29963181 DOI: 10.3892/ol.2018.8708] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 03/07/2017] [Indexed: 12/14/2022] Open
Abstract
A previous randomized phase II study in patients with non-small cell lung cancer (NSCLC) identified that combination treatment with erlotinib plus bevacizumab prolonged progression-free survival compared with erlotinib alone. However, combination bevacizumab and erlotinib treatment generally increased the risk of severe adverse events, including hemorrhage, thrombosis, fistula formation and gastrointestinal perforation. The present report describes two patients with NSCLC harboring epidermal growth factor receptor (EGFR) mutations, who experienced gastrointestinal perforation associated with erlotinib plus bevacizumab combination therapy. The first patient, a 67-year-old male with stage IIIB lung adenocarcinoma harboring a L858R point mutation in EGFR exon 21, received concurrent chemoradiotherapy. However, seven months later, the patient experienced a relapse and was administered erlotinib plus bevacizumab treatment. A total of two months subsequent to commencing treatment, the patient developed a perforated duodenal ulcer. The second patient, a 66-year-old male with lung adenocarcinoma harboring a deletion in EGFR exon 19 and multiple pulmonary metastases, demonstrated a partial response to erlotinib plus bevacizumab treatment. A total of seven months subsequent to starting treatment, the patient experienced lower abdominal pain, and abdominal computed tomography confirmed a diagnosis of colocutaneous fistula complicating sigmoid diverticulitis. Following repair of the perforation, both patients were restarted on erlotinib treatment alone. Gastrointestinal perforation may be a potentially severe adverse event of erlotinib plus bevacizumab combination therapy, even in the absence of tumor metastasis in the abdomen.
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Affiliation(s)
- Teppei Yamaguchi
- Department of Respiratory Medicine, Fujita Health University, Toyoake, Aichi 470-1192, Japan
| | - Yusuke Gotoh
- Department of Respiratory Medicine, Fujita Health University, Toyoake, Aichi 470-1192, Japan
| | - Hidekazu Hattori
- Department of Radiology, Fujita Health University, Toyoake, Aichi 470-1192, Japan
| | - Hidetoshi Katsuno
- Department of Surgery, Fujita Health University, Toyoake, Aichi 470-1192, Japan
| | - Kazuyoshi Imaizumi
- Department of Respiratory Medicine, Fujita Health University, Toyoake, Aichi 470-1192, Japan
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Affiliation(s)
- Y. Gotoh
- Central Research Laboratory, Hitachi, Ltd. Kokubunji, Tokyo 185 Japan (0423) 23-1111
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Hirohata Y, Shibahara T, Tanabe T, Oya Y, Arai T, Gotoh Y, Masaki K, Yagyu J, Oyaidzu M, Okuno K, Nishikawa M, Miya N. Retention of Hydrogen Isotopes in Divertor Tiles Used in JT-60U. Fusion Science and Technology 2017. [DOI: 10.13182/fst05-a986] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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)
- Y. Hirohata
- Hokkaido University, Sapporo, 060-8628 Japan
| | - T. Shibahara
- Nagoya University, Chikusa-ku, Nagoya, 464-8603 Japan
| | - T. Tanabe
- Nagoya University, Chikusa-ku, Nagoya, 464-8603 Japan
| | - Y. Oya
- The University of Tokyo, Bunkyo-ku, Tokyo, 113-0032 Japan,
| | - T. Arai
- Japan Atomic Energy Research Institute, Naka-gun, Ibaraki, 311-0913 Japan
| | - Y. Gotoh
- Japan Atomic Energy Research Institute, Naka-gun, Ibaraki, 311-0913 Japan
| | - K. Masaki
- Japan Atomic Energy Research Institute, Naka-gun, Ibaraki, 311-0913 Japan
| | - J. Yagyu
- Japan Atomic Energy Research Institute, Naka-gun, Ibaraki, 311-0913 Japan
| | - M. Oyaidzu
- Shizuoka University, Ohya, Shizuoka 422-8529, Japan
| | - K. Okuno
- Shizuoka University, Ohya, Shizuoka 422-8529, Japan
| | - M. Nishikawa
- Kyusyu University, Higashi-ku, Fukuoka,812-8581, Japan
| | - N. Miya
- Japan Atomic Energy Research Institute, Naka-gun, Ibaraki, 311-0913 Japan
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Abstract
Purpose
This study aims to propose and evaluate a searching scheme for a bichromatic reverse k-nearest neighbor (BRkNN) that has objects and queries in spatial networks. In this proposed scheme, the author’s search for the BRkNN of the query using an influence zone for each object with a network Voronoi diagram (NVD).
Design/methodology/approach
The author’s analyze and evaluate the performance of the proposed searching scheme.
Findings
The contribution of this paper is that it confirmed that the proposed searching scheme gives shorter processing time than the conventional linear search.
Research limitations/implications
A future direction of this study will involve making a searching scheme that reduces the processing time when objects move automatically on spatial networks.
Practical implications
In BRkNN, consider two groups in a convenience store, where several convenience stores, which are constructed in Groups A and B, operate in a given region. The author’s can use RNN is RkNN when k = 1 (RNN) effectively to set a new store considering the Euclidean and road distances among stores and the location relationship between Groups A and B.
Originality/value
In the proposed searching scheme, the author’s search for the BRkNN of the query for each object with an NVD using the influence zone, which is the region where an object in the spatial network recognizes the nearest neighbor for the query.
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Isogai S, Niwa Y, Yatsuya H, Hayashi M, Yamamoto N, Okamura T, Minezawa T, Goto Y, Yamaguchi T, Takeyama T, Sakakibara Y, Morikawa S, Horiguchi T, Gotoh Y, Mieno Y, Uozu S, Nakanishi T, Okazawa M, Sakakibara H, Imaizumi K. Increased airway hyperresponsiveness to adenosine in patients with aspirin intolerant asthma. Allergol Int 2017; 66:360-362. [PMID: 27816384 DOI: 10.1016/j.alit.2016.10.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 09/16/2016] [Accepted: 09/26/2016] [Indexed: 11/15/2022] Open
Affiliation(s)
- Sumito Isogai
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan.
| | - Yoshikazu Niwa
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Hiroshi Yatsuya
- Department of Public Health, Fujita Health University, Aichi, Japan
| | - Masamichi Hayashi
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Naoki Yamamoto
- Laboratory of Molecular Biology & Histochemistry, Fujita Health University, Aichi, Japan
| | - Takuya Okamura
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Tomoyuki Minezawa
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Yasuhiro Goto
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Teppei Yamaguchi
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Tomoko Takeyama
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Yosuke Sakakibara
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Sayako Morikawa
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Tomoya Horiguchi
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Yusuke Gotoh
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Yuki Mieno
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Sakurako Uozu
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Toru Nakanishi
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Mitsushi Okazawa
- Department of Respiratory Medicine, Daiyukai General Hospital, Aichi, Japan
| | | | - Kazuyoshi Imaizumi
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
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Nakane A, Gotoh Y, Ichihara J, Nagata H. New screening strategy and analysis for identification of allosteric modulators for glucagon-like peptide-1 receptor using GLP-1 (9-36) amide. Anal Biochem 2015; 491:23-30. [PMID: 26341912 DOI: 10.1016/j.ab.2015.08.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Revised: 08/22/2015] [Accepted: 08/24/2015] [Indexed: 12/25/2022]
Abstract
The glucagon-like peptide-1 receptor (GLP-1R) is an important physiologic regulator of insulin secretion and a major therapeutic target for diabetes mellitus. GLP-1 (7-36) amide (active form of GLP-1) is truncated to GLP-1 (9-36) amide, which has been described as a weak agonist of GLP-1R and the major form of GLP-1 in the circulation. New classes of positive allosteric modulators (PAMs) for GLP-1R may offer improved therapeutic profiles. To identify these new classes, we developed novel and robust primary and secondary high-throughput screening (HTS) systems in which PAMs were identified to enhance the GLP-1R signaling induced by GLP-1 (9-36) amide. Screening enabled identification of two compounds, HIT-465 and HIT-736, which possessed new patterns of modulation of GLP-1R. We investigated the ability of these compounds to modify GLP-1R signaling enhanced GLP-1 (9-36) amide- and/or GLP-1 (7-36) amide-mediated cyclic adenosine monophosphate (cAMP) accumulation. These compounds also had unique profiles with regard to allosteric modulation of multiple downstream signaling (PathHunter β-arrestin signaling, PathHunter internalization signaling, microscopy-based internalization assay). We found allosteric modulation patterns to be obviously different among HIT-465, HIT-736, and Novo Nordisk compound 2. This work may enable the design of new classes of drug candidates by targeting modulation of GLP-1 (7-36) amide and GLP-1 (9-36) amide.
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Affiliation(s)
- Atsushi Nakane
- Genomic Science Laboratories, Sumitomo Dainippon Pharma, Konohana-ku, Osaka 554-0022, Japan
| | - Yusuke Gotoh
- Genomic Science Laboratories, Sumitomo Dainippon Pharma, Konohana-ku, Osaka 554-0022, Japan
| | - Junji Ichihara
- Genomic Science Laboratories, Sumitomo Dainippon Pharma, Konohana-ku, Osaka 554-0022, Japan
| | - Hidetaka Nagata
- Genomic Science Laboratories, Sumitomo Dainippon Pharma, Konohana-ku, Osaka 554-0022, Japan.
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14
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Gotoh Y, Kita S, Fujii M, Tagashira H, Horie I, Arai Y, Uchida S, Iwamoto T. Genetic knockout and pharmacologic inhibition of NCX2 cause natriuresis and hypercalciuria. Biochem Biophys Res Commun 2015; 456:670-5. [DOI: 10.1016/j.bbrc.2014.12.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Accepted: 12/04/2014] [Indexed: 10/24/2022]
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15
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Yamada Y, Sakamoto S, Saduka T, Gotoh Y, Kaga M, Yanagisawa M, Kawamura K, Kamiya N, Imamoto T, Nihei N, Suzuki H, Ichikawa T. MP63-18 VALIDATION OF ACTIVE SURVEILLANCE CRITERIA FOR PATHOLOGICAL INSIGNIFICANT PROSTATE CANCER IN JAPANESE MEN. J Urol 2014. [DOI: 10.1016/j.juro.2014.02.1955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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Gotoh Y, Yoshihisa T, Taniguchi H, Kanazawa M. A scheduling method for heterogeneous clients on media data broadcasting. International Journal of Pervasive Computing and Communications 2013. [DOI: 10.1108/ijpcc-04-2013-0009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
PurposeThe purpose of this paper is to propose a scheduling method called the “Hierarchical Asynchronous Harmonic Broadcasting (H‐AHB)” method, to reduce the waiting time for heterogeneous clients.Design/methodology/approachThe authors analyze and evaluate the performance of the proposed H‐AHB method.FindingsIt was confirmed that the proposed method gives shorter average waiting time than the conventional methods.Research limitations/implicationsA future direction of this study will involve making a scheduling method where the server broadcasts multiple videos.Practical implicationsIn general broadcasting systems, the server broadcasts the same data repetitively and clients wait until the first portion of the data is broadcast. Although the server can deliver the data to many clients concurrently, clients have to wait until their desired data are broadcast.Originality/valueThe H‐AHB method further reduces waiting time by scheduling an effective broadcast that considers the number of clients' available channels.
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17
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Okumura W, Yamaguchi T, Ohkoshi Y, Gotoh Y, Nagura M. Direct Measurement of Fiber Temperature in the Continuous Drawing Process of PET Fiber Heated by CO2 Laser Radiation. INT POLYM PROC 2013. [DOI: 10.3139/217.1684] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Poly(ethylene terephthalate) (PET) fiber was heated by carbon dioxide laser radiation during the continuous drawing process. Numerical calculation shows that the PET fiber can be heated much more rapidly and uniformly by heat radiation than by convective heat transfer through the fiber surface. During CO2 laser heated drawing, temperature in the vicinity of a neck-like deformation can be measured on-line with high precision, because the neck-like deformation is located within a range of 0.5 mm. We measured the fiber temperature profiles on the drawing process by IR thermometer that has a range resolution of 0.355 mm. The temperature at which neck-like deformation of the fiber initiates is higher than Tg when draw ratio is less than 4.5, but lower than Tg when draw ratio is more than 5.5. The maximum fiber temperature in the drawing process increases with draw ratio, up to 208°C for a draw ratio of 6.0. The rate of orientation-induced crystallization in the drawing process was estimated by comparison of measured temperature profiles with calculated temperature profiles.
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Affiliation(s)
- W. Okumura
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - T. Yamaguchi
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - Y. Ohkoshi
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - Y. Gotoh
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - M. Nagura
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
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18
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Abstract
Abstract
Poly (ethylene terephthalate) (PET) fiber was heated by carbon dioxide laser radiation in the continuous drawing process. By this procedure, the position of the deformation region could be fixed precisely in the air. The location of neck-like deformation fluctuated within a range of about 0.2 mm for draw ratios of 4.0 to 4.5 and within a range of about 0.5 mm for draw ratios of 5.5 to 6.0, but the location fluctuated over a range of 1.0 mm for a draw ratio of 5.0. Fiber diameter profiles, which were used to calculate Hencky strain rate profiles and apparent elongational viscosity profiles, were obtained from high-speed video camera images of the deformation region. Regardless of draw ratio, apparent elongational viscosity exhibited almost the same minimum value. Apparent elongational viscosity is much lower than the value obtained by measurement at a low, constant strain rate, but the elongational stress acting at the point where apparent elongational viscosity begins to increase steeply (Hencky strain of about 1.0) is of the same order of magnitude as the reported value. For draw ratios less than 5.0, the temperature where apparent viscosity is lowest is about 100 to 120°C, which corresponds to the flow temperature of amorphous PET, whereas for draw ratios exceeding 5.0 the temperature where apparent viscosity is lowest is about 80°C, which corresponds to the glass transition temperature. Thus, the former corresponds to so-called neck-like deformation typically observed in high-speed spinning, and the latter corresponds to necking typically observed in cold drawing. These two types of deformation appear in turns for a draw ratio of 5.0, and therefore the location of the deformation region fluctuates greatly. This measurement system can be used as a high-strain-rate elongational rheometer for analyzing practical polymer processing systems, which can easily measure the precise on-line deformation history with a time resolution in the μs level.
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Affiliation(s)
- W. Okumura
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - T. Kanegae
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - Y. Ohkoshi
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - Y. Gotoh
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - M. Nagura
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
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Nakabayashi T, Gotoh Y, Kamada N, Fujioka M, Ishihara T, Hirabayashi A, Sato H. Characterization of in vitro biotransformation of the new oral anticoagulants, the factor VIIa inhibitors AS1927819-00 and AS1932804-00. Pharmazie 2013; 68:406-413. [PMID: 23875246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We recently developed a prodrug (AS1932804-00, CMP) of the novel FVIIa inhibitor AS1924269-00, which possesses a carbamate amidine backbone. In addition, we developed another type of prodrug (AS1927819-00, OXP) with an oxime amidine backbone. In this study, we investigated the efficiency of conversion of these novel FVIIa prodrugs to their active forms by evaluating the production of the active form in vitro by using microsomes, mitochondria, and cryopreserved hepatocytes, and compared it with the in vivo conversion mechanisms of the prodrugs (oxime amidine vs. carbamate amidine). We observed that OXP and CMP showed improved oral absorption, and the efficiency of conversion of CMP to the active form was higher than that of OXP. The in vivo rate of conversion of OXP to its active form was low in rats, and compared to liver microsomes and mitochondria, cryopreserved hepatocytes supplemented with serum and coenzymes were an appropriate metabolic test tool. On the other hand, the efficiency of conversion of CMP to its active from could be appropriately evaluated using small intestinal microsomes. The development of a prodrug can be optimized when information about the stability of carboxylic acid esters in the presence of serum esterases, membrane permeability of intermediate forms, and differential tissue specificity to metabolic activities for carbamate and oxime backbones of amidine can be obtained.
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Affiliation(s)
- T Nakabayashi
- Pharmacokinetics Research Laboratories, Kissei Pharmaceutical Co., Ltd., 19-48 Yoshino, 399-8710 Matsumoto-City, Nagano-Pref, Japan.
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Nakabayashi T, Gotoh Y, Kamada N, Fujioka M, Ishihara T, Hirabayashi A, Sato H. Pharmacokinetics of the amidine prodrug of a novel oral anticoagulant factor VIIa inhibitor (AS1924269-00) in rats. Pharmazie 2013; 68:349-354. [PMID: 23802432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
AS1924269-00 is a promising orally applicable anticoagulant that inhibits FVIIa but has very low oral absorption. Therefore, in this study, we aimed to develop a prodrug of AS1924269-00, which possesses a carbamate-added amidine functional group, with high membrane permeability. We investigated the pharmacokinetics of the carbamate-type prodrug of AS1924269-00 in rats. The Caco-2 cell monolayer was used as an in vitro model and in parallel an artificial membrane permeability assay (PAMPA) was performed to examine the transport mechanisms of the prodrug. The bioavailability of the active form was determined to be only 0.3% in rats, but the oral absorption of the prodrug was markedly improved, and its bioavailability was 36%. Our in vivo result was consistent with the finding that compared to AS1924269-00, the prodrug showed favorable permeability in Caco-2 cells and PAMPA. We introduced carbamate into the amidine functional group of the FVIIa inhibitor, which possesses the amidine backbone, and converted it to a prodrug using carboxylic acid ethyl ester. This novel prodrug had favorable absorption and membrane permeability in vivo and in vitro. Thus, we suggest a clinical application of the carbamate-added amidine prodrug of the FVIIa inhibitor.
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Affiliation(s)
- T Nakabayashi
- Pharmacokinetics Research Laboratories, Kissei Pharmaceutical Co., Ltd., Nagano, Japan.
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Nakata K, Nakamura F, Ohkoshi Y, Gotoh Y, Nagura M, Hamano A, Takada S, Kikutani T. High-Strength PET Fibers Produced by Conjugated Melt Spinning and Laser Drawing. INT POLYM PROC 2013. [DOI: 10.3139/217.2573] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
The mechanical properties of conjugated-spun and laser drawn poly(ethylene terephthalate) (PET) fibers were investigated. The as-spun fibers used for the laser drawing were made by conjugated melt spinning with the copolymer of p-hydroxybenzoicacid and 2-hydroxy-6-naphthoicacid or polystyrene. The PET fibers prepared by conjugated spinning could be laser drawn to higher draw ratios under lower drawing stresses. The drawn fiber could be re-drawn up to a higher total draw ratio. Thus, a PET fiber having a tensile strength of 1.14 N/tex could be produced.
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Affiliation(s)
- K. Nakata
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - F. Nakamura
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - Y. Ohkoshi
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - Y. Gotoh
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - M. Nagura
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - A. Hamano
- Japan Chemical Innovation Institute, Tokyo, Japan
| | - S. Takada
- Japan Chemical Innovation Institute, Tokyo, Japan
| | - T. Kikutani
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Tokyo, Japan
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Uddin AJ, Ohkoshi Y, Gotoh Y, Nagura M, Endo R, Hara T. Effects of Take-up Speed of Melt Spinning on the Structure and Mechanical Propertiesof Maximally Laser Drawn PA9-T Fibers. INT POLYM PROC 2013. [DOI: 10.3139/217.0090] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
A new semiaromatic polyamide, PA9-T, was melt-spun at take-up speeds from 200 to 1000m min−1. The as-spun fibers were drawn with CO2 laser-heated drawing to their maximal draw ratio (DRmax). The drawing stress was recorded during this process. The effects of take-up speed of melt-spinning on maximally drawn fibers were characterized through measurements of density, birefringence, wide-angle X-ray diffraction, crystal orientation, tensile testing, and dynamic viscoelastic analysis. All as-spun fibers were essentially amorphous and their birefringence and density increased slightly with the increase of take-up speed. Lower take-up speeds yielded higher DRmax values, and fibers drawn to their DRmax exhibited superior structure and mechanical properties. The tensile strength and Young's modulus achieved were the highest reported to date for PA9-T: 737 MPa and 5.8 GPa, respectively.
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Affiliation(s)
- A. J. Uddin
- Faculty of Textile Science & Technology, Shinshu University, Nagano, Japan
| | - Y. Ohkoshi
- Faculty of Textile Science & Technology, Shinshu University, Nagano, Japan
| | - Y. Gotoh
- Faculty of Textile Science & Technology, Shinshu University, Nagano, Japan
| | - M. Nagura
- Faculty of Textile Science & Technology, Shinshu University, Nagano, Japan
| | - R. Endo
- Kuraray Co. Ltd., Kurashiki, Japan
| | - T. Hara
- Kuraray Co. Ltd., Kurashiki, Japan
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Maruo T, Gotoh Y, Nishimura H, Ohashi S, Toda T, Takahashi K. Oral administration of milk fermented with Lactococcus lactis subsp. cremoris FC protects mice against influenza virus infection. Lett Appl Microbiol 2012; 55:135-40. [PMID: 22642647 DOI: 10.1111/j.1472-765x.2012.03270.x] [Citation(s) in RCA: 29] [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: 11/28/2022]
Abstract
AIMS To evaluate the protective effects of oral administration of milk fermented with a Lactococcus strain against influenza virus (IFV) infection in a mouse model. METHODS AND RESULTS Milk fermented with exopolysaccharide-producing Lactococcus lactis subsp. cremoris (L. cremoris) FC was orally administered to BALB/c mice for 12 days. Mice were intranasally infected with IFV A/New Caledonia/20/99 (H1N1) on day 8, and survival was determined for 14 days after IFV infection. Survival rate and body weight loss after IFV infection in the L. cremoris FC fermented milk-administered group were significantly improved compared with those in the control group. In the unfermented milk-administered group, survival rate was not improved, whereas body weight loss was slightly improved compared with that in the control group. The mean virus titre in the lung of the L. cremoris FC fermented milk-administered group 3 days after infection was significantly decreased compared with that in the control group. CONCLUSIONS These results suggest that oral administration of milk fermented with L. cremoris FC protects mice against IFV infection. SIGNIFICANCE AND IMPACT OF THE STUDY These results demonstrate that oral administration of milk fermented with exopolysaccharide-producing Lactococcus strains might protect host animals against IFV infection.
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Affiliation(s)
- T Maruo
- Fujicco Co. Ltd, Hyogo, Japan
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Gotoh Y, Yoshihisa T, Taniguchi H, Kanazawa M. A scheduling method for continuous media data broadcasting considering commercial contents. International Journal of Pervasive Computing and Communications 2012. [DOI: 10.1108/17427371211221108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
PurposeThe purpose of this paper is to propose a scheduling method called the “Asynchronous Harmonic Broadcasting Considering Commercial (AHB‐CC)” method, to reduce waiting time for continuous media data broadcasting.Design/methodology/approachThe authors analyze and evaluate the performance of the proposed AHB‐CC method.FindingsThe authors confirm that the proposed method gives shorter average waiting times than the conventional methods.Research limitations/implicationsA future direction of this study will involve making a scheduling method where the server concurrently broadcasts data and commercial contents. Also, maximum buffer size needs to be considered.Practical implicationsIn general broadcasting systems, the server broadcasts the same data repetitively and clients wait until the first portion of the data is broadcast. Although the server can deliver the data to many clients concurrently, clients have to wait until their desired data are broadcast.Originality/valueThe AHB‐CC method presented in the paper further reduces waiting time by scheduling an effective broadcast that considers the playing time of commercial contents.
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25
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Sugimoto M, Itoh T, Gotoh Y, Kawahara T, Moriya H, Uchimura Y, Sugimoto Y. Enhanced clinical mastitis resistance in Holsteins with a FEZL p.Gly105(12_13) polymorphism. J Dairy Sci 2011; 94:2103-7. [PMID: 21427001 DOI: 10.3168/jds.2010-3362] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2010] [Accepted: 12/14/2010] [Indexed: 11/19/2022]
Abstract
Mastitis is a common infectious disease of the mammary gland and a major problem in the dairy industry. We previously reported that forebrain embryonic zinc finger-like (FEZL) encoding a stretch of 12 glycines (p.Gly105[12]) instead of 13 glycines (p.Gly105[13]) is associated with a lower somatic cell score (SCS) in a family derived from Walkway Chief Mark. Here we report that the p.Gly105[12] allele is associated with a significantly decreased incidence of clinical mastitis in a large Holstein population. We genotyped the FEZL polymorphism in 918 randomly collected Holstein sires, and investigated the effect of the polymorphism on the estimated breeding value (EBV) for SCS and milk, fat, solids-not-fat, and protein yield, and on the number of cattle with clinical mastitis among daughters derived from these sires. The average EBV for SCS among sires carrying the heterozygous p.Gly105[12] was significantly lower than that among sires carrying the homozygous p.Gly105[13], whereas we found no unfavorable effects of this polymorphism on EBV for milk, fat, solids-not-fat, and protein yield. The proportion of cows with clinical mastitis derived from sires carrying heterozygous p.Gly105[12] was significantly lower than that of daughters derived from sires carrying the homozygous p.Gly105[13]. Thus, selection of sires carrying p.Gly105[12] could be beneficial in the dairy industry by reducing the incidence of mastitis.
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Affiliation(s)
- M Sugimoto
- National Livestock Breeding Center, Fukushima 961-8511, Japan
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26
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Gotoh Y, Yoshihisa T, Taniguchi H, Kanazawa M. A scheduling method for waiting time reduction in node relay-based webcast considering available bandwidth. IJGUC 2011. [DOI: 10.1504/ijguc.2011.042945] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Takeya S, Yoneyama A, Miyamoto J, Gotoh Y, Ueda K, Hyodo K, Takeda T. Phase-contrast X-ray imaging of the gas diffusion layer of fuel cells. J Synchrotron Radiat 2010; 17:813-816. [PMID: 20975230 DOI: 10.1107/s0909049510040008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2010] [Accepted: 10/06/2010] [Indexed: 05/30/2023]
Abstract
The understanding of and in situ observation of the transport and distribution of water in carbon-paper gas diffusion layers (GDLs) using non-destructive imaging techniques is critical for achieving high performance in polymer electrolyte fuel cells (PEFCs). To investigate the behavior of water in GDLs of PEFCs, phase-contrast X-ray imaging via X-ray interferometric imaging (XII) and diffraction-enhanced imaging (DEI) were performed using 35 keV X-rays. The XII technique is useful for the radiographic imaging of GDLs and in situ observations of water evolution processes in operating PEFCs. DEI provides a way for tomographic imaging of GDLs in PEFCs. Because high-energy X-rays are applicable to the imaging of both carbon papers and heavy materials, which make up PEFCs, phase-contrast X-ray imaging techniques have proven to be valuable for investigation of GDLs.
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Affiliation(s)
- S Takeya
- Research Institute of Instrumentation Frontier, National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Japan.
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Abstract
X-ray diffraction study of solid CO(2) at room temperature has shown that the powder pattern of the high-pressure phase, which supersedes the low-pressure cubic Pa3 phase at about 10 gigapascals, is consistently interpreted in terms of an orthorhombic Cmca structure. The orthorhombic cell at 11.8 gigapascals has dimensions of 4.330 +/- 0.015, 4.657 +/- 0.005, 5.963 +/- 0.009 angstroms for its a, b, and c faces, respectively, and a volume of 120.3 +/- 0.5 cubic angstroms. Four molecules contained in the unit cell are located at the base-centered positions with their molecular axes inclined at about 52 degrees with respect to the crystallographic c axis. The volume change associated with the Pa3-Cmca transition is close to zero. The structural dimensions obtained for the high-pressure crystalline phase of CO(2) are of great importance for a theoretical understanding of the role of intermolecular interactions, including quadrupole-quadrupole interactions, in molecular condensation.
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Kawasaki Y, Gotoh Y, Tokuzen K, Kamimura M, Komeno T, Tomatsu M, Todoroki R, Nagasaki Y, Soga K, Tashiro F. Selective tumor imaging by a novel tumor specific aralin-infrared-to-visible phosphor conjugate. ACTA ACUST UNITED AC 2009. [DOI: 10.1088/1742-6596/191/1/012001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Gotoh H, Gohda T, Tanimoto M, Gotoh Y, Horikoshi S, Tomino Y. Contribution of subcutaneous fat accumulation to insulin resistance and atherosclerosis in haemodialysis patients. Nephrol Dial Transplant 2009; 24:3474-80. [DOI: 10.1093/ndt/gfp290] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [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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31
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Gotoh Y. Role of O atom modulation in the self-doped spin-ladder compound Sr 14Cu 24O 41. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308083694] [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: 11/11/2022] Open
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32
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Abstract
Inhibitor of NF-kappaB (IkappaB) kinase (IKK) and c-Jun NH(2)-terminal kinase (JNK) are stress inducible kinases that critically regulate numerous physiological and pathological processes. Transient activation of the downstream transcription factors NF-kappaB and AP-1, allows for stress inducible, inflammatory and innate immune gene expression programs. However, elevated chronic activity is associated with cancer and chronic inflammatory disease. Despite its relevance to human health, little is known about the molecular mechanisms that control constitutive activity of IKK and JNK. Here, we demonstrate that the serine/threonine kinase PKN1 plays a critical role in regulating constitutive IKK/JNK activity in unstimulated cells and report on the molecular mechanism. We identify TRAF1 as a substrate of PKN1 kinase activity in vitro and in vivo, and show that this phosphorylation event is required for attenuating downstream kinase activities. Furthermore, this silencing was dependent on TNFR2. Mutagenesis of the phospho-acceptor residue in TRAF1 abrogated PKN1-dependent recruitment to TNFR2. Our results suggest a model by which the stoichiometric ratio of TRAF1 and TRAF2 heteromeric complexes associated with TNFR2 control the tonic activity of JNK and IKK. TRAF1 phosphorylation by the ubiquitously expressed kinase PKN1 thereby plays a critical role in the negative regulation of tonic activity of the two central inflammatory signaling pathways.
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Affiliation(s)
- Tomohisa Kato
- Biosignal Research Center, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan.
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Hosaka H, Aoyagi K, Aihara M, Yamashiro D, Gotoh Y, Tomoko T, Osada M, Deura S, Shinpei S. Emotion is involved in decision making by prediction of reward – A study of sympathetic skin response. Clin Neurophysiol 2007. [DOI: 10.1016/j.clinph.2007.05.034] [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: 11/29/2022]
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Abstract
We report on two children with acute encephalopathy showing mild clinical manifestations and reversible white matter lesions. In both patients, MRI revealed high intensities on T (2)-weighted imaging and marked reductions of water diffusion in the white matter of the bilateral centrum semiovale and the corpus callosum. These abnormalities disappeared along with the neurological symptoms within a week in both patients. These children represent a characteristic group of patients among childhood acute encephalopathy.
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Affiliation(s)
- A Okumura
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan.
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35
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Toda K, Gotoh Y, Asakura T, Yabe I, Furuse H. Fluid viscosity of Aureobasidium pullulans cultures obtained at two different initial pH values. J Biosci Bioeng 2005; 89:258-61. [PMID: 16232739 DOI: 10.1016/s1389-1723(00)88829-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/1999] [Accepted: 12/20/1999] [Indexed: 10/18/2022]
Abstract
Aureobasidium pullulans IAM 5060 grown in media with initial pHs of 6 and 7 differed in its production of exopolysaccharides (EPS). Under the latter condition, EPS of a high molecular weight was produced in an especially large amount. The viscosity of the culture broths and the EPS solutions obtained by removing the microbial cells exhibited a marked non-Newtonian and complex behavior depending on the measurement method. The nature of the viscosity of the fluids is explained by means of several structural models of their constitutive particles.
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Affiliation(s)
- K Toda
- Institute of Molecular and Cellular Biosciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan
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36
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Oya Y, Hirohata Y, Tanabe T, Shibahara T, Kimura H, Oyaidzu M, Arai T, Masaki K, Gotoh Y, Okuno K, Miya N, Hino T, Tanaka S. Hydrogen isotope distributions and retentions in the inner divertor tile of JT-60U. Fusion Engineering and Design 2005. [DOI: 10.1016/j.fusengdes.2005.06.074] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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37
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Onoda M, Miyazaki Y, Kajitani T, Gotoh Y. Diffuse scattering from composite crystals containing stacking faults. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305080189] [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: 11/10/2022] Open
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38
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Sunayama J, Ando Y, Itoh N, Tomiyama A, Sakurada K, Sugiyama A, Kang D, Tashiro F, Gotoh Y, Kuchino Y, Kitanaka C. Physical and functional interaction between BH3-only protein Hrk and mitochondrial pore-forming protein p32. Cell Death Differ 2005; 11:771-81. [PMID: 15031724 DOI: 10.1038/sj.cdd.4401418] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Bcl-2 homology domain (BH) 3-only proteins of the proapoptotic Bcl-2 subfamily play a key role as initiators of mitochondria-dependent apoptosis. To date, at least 10 mammalian BH3-only proteins have been identified, and it is now being realized that they have different roles and mechanisms of regulation in the transduction of apoptotic signals to mitochondria. Hrk/DP5 is one of the mammalian BH3-only proteins implicated in a variety of physiological and pathological apoptosis, yet the molecular mechanism involved in Hrk-mediated apoptosis remains poorly understood. In an attempt to identify cellular proteins participating in Hrk-mediated apoptosis, we have conducted yeast two-hybrid screening for Hrk-interacting proteins and isolated p32, a mitochondrial protein that has been shown to form a channel consisting of its homotrimer. In vitro binding, co-immunoprecipitation, as well as immunocytochemical analyses verified specific interaction and colocalization of Hrk and p32, both of which depended on the presence of the highly conserved C-terminal region of p32. Importantly, Hrk-induced apoptosis was suppressed by the expression of p32 mutants lacking the N-terminal mitochondrial signal sequence (p32(74-282)) and the conserved C-terminal region (p32 (1-221)), which are expected to inhibit binding of Hrk competitively to the endogenous p32 protein and to disrupt the channel function of p32, respectively. Furthermore, small interfering RNA-mediated knockdown of p32 conferred protection against Hrk-induced apoptosis. Altogether, these results suggest that p32 may be a key molecule that links Hrk to mitochondria and is critically involved in the regulation of Hrk-mediated apoptosis.
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Affiliation(s)
- J Sunayama
- Institute of Molecular and Cellular Biosciences, University of Tokyo, Tokyo, Japan
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39
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Ogihara T, Asano T, Katagiri H, Sakoda H, Anai M, Shojima N, Ono H, Fujishiro M, Kushiyama A, Fukushima Y, Kikuchi M, Noguchi N, Aburatani H, Gotoh Y, Komuro I, Fujita T. Oxidative stress induces insulin resistance by activating the nuclear factor-kappa B pathway and disrupting normal subcellular distribution of phosphatidylinositol 3-kinase. Diabetologia 2004; 47:794-805. [PMID: 15127200 DOI: 10.1007/s00125-004-1391-x] [Citation(s) in RCA: 107] [Impact Index Per Article: 5.4] [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: 10/20/2003] [Accepted: 01/26/2004] [Indexed: 11/29/2022]
Abstract
AIMS/HYPOTHESIS Oxidative stress is associated with diabetes, hypertension and atherosclerosis. Insulin resistance is implicated in the development of these disorders. We tested the hypothesis that oxidative stress induces insulin resistance in rats, and endeavoured to identify mechanisms linking the two. METHODS Buthionine sulfoximine (BSO), an inhibitor of glutathione synthase, was administered to Sprague-Dawley rats and 3T3-L1 adipocytes. Glucose metabolism and insulin signalling both in vivo and in 3T3-L1 adipocytes were examined. In 3T3-L1 adipocytes, the effects of overexpression of a dominant negative mutant of inhibitory kappa B (I kappa B), one role of which is to block oxidative-stress-induced nuclear factor (NF)-kappa B activation, were investigated. RESULTS In rats given BSO for 2 weeks, the plasma lipid hydroperoxide level doubled, indicating increased oxidative stress. A hyperinsulinaemic-euglycaemic clamp study and a glucose transport assay using isolated muscle and adipocytes revealed insulin resistance in BSO-treated rats. BSO treatment also impaired insulin-induced glucose uptake and GLUT4 translocation in 3T3-L1 adipocytes. In BSO-treated rat muscle, adipose tissue and 3T3-L1 adipocytes, insulin-induced IRS-1 phosphorylation in the low-density microsome (LDM) fraction was specifically decreased, while that in whole cell lysates was not altered, and subsequent translocation of phosphatidylinositol (PI) 3-kinase from the cytosol and the LDM fraction was disrupted. BSO-induced impairments of insulin action and insulin signalling were reversed by overexpressing the dominant negative mutant of I kappa B, thereby suppressing NF-kappa B activation. CONCLUSIONS/INTERPRETATION Oxidative stress induces insulin resistance by impairing IRS-1 phosphorylation and PI 3-kinase activation in the LDM fraction, and NF-kappa B activation is likely to be involved in this process.
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Affiliation(s)
- T Ogihara
- Department of Internal Medicine, Graduate School of Medicine, University of Tokyo, Japan
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40
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Abstract
TOF-SIMS is used to investigate the interactions between D2O and hydrophobic molecules, such as CH4, CH3F, CH2F2, CHF3, and CF4, at cryogenic temperatures (15 K). By irradiation with a 1.5-keV He+ beam, the D(+)(D2O)n ions are ejected efficiently from the D2O nanoclusters physisorbed on the CF4 layer due to Coulomb explosion: the ion yields are by about two orders of magnitude higher than those from a thick D2O layer via the kinetic sputtering. The D(+)(D2O)n yields decrease on the CHnF(4-n) layer with increasing the number of the C-H group. This is because the Coulombic fission is quenched due to the delocalization of valence holes through the C-H...H-C and C-H...D2O contacts. A pure D2O film is hardly grown on the CH4 layer as a consequence of intermixing whereas the D2O molecules basically adsorb on the surfaces of fluoromethanes, suggesting the attractive (water-repellent) interactions in the C-H...D2O (C-F...D2O) contacts. The C-H...O bond behaves like a conventional O-H...O hydrogen bond as far as the collision-induced proton transfer reaction is concerned.
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Affiliation(s)
- R Souda
- Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
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41
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Gotoh Y, Oishi K, Shibata H, Yamagiwa A, Isagawa T, Nishimura T, Goyama E, Takahashi M, Mukai H, Ono Y. Protein kinase PKN1 associates with TRAF2 and is involved in TRAF2-NF-κB signaling pathway. Biochem Biophys Res Commun 2004; 314:688-94. [PMID: 14741690 DOI: 10.1016/j.bbrc.2003.12.148] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
PKN1 is a fatty acid and Rho-activated serine/threonine protein kinase whose catalytic domain is highly homologous to protein kinase C (PKC) family. In yeast two-hybrid screening for PKN1 binding proteins, we identified tumor necrosis factor alpha (TNFalpha) receptor-associated factor 2 (TRAF2). TRAF2 is one of the major mediators of TNF receptor superfamily transducing TNF signal to various functional targets, including activation of NF-kappaB, JNK, and apoptosis. FLAG-tagged PKN1 was co-immunoprecipitated with endogenous TRAF2 from HEK293 cell lysate, and in vitro binding assay using the deletion mutants of TRAF2 showed that PKN1 directly binds to the TRAF domain of TRAF2. PKN1 has the TRAF2-binding consensus sequences PXQX (S/T) at amino acid residues 580-584 (PIQES), and P580AQ582A mutant was not co-immunoprecipitated with TRAF2. Furthermore, the reduced expression of PKN1 by RNA interference (RNAi) down-regulated TRAF2-induced NF-kappaB activation in HEK293T cells. These results suggest that PKN1 is involved in TRAF2-NF-kappaB signaling pathway.
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Affiliation(s)
- Yusuke Gotoh
- Graduate School of Science and Technology, Kobe University, 657-8501, Kobe, Japan
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42
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Jalal Uddin A, Ohkoshi Y, Gotoh Y, Nagura M, Endo R, Hara T. Melt spinning and laser-heated drawing of a new semiaromatic polyamide, PA9-T fiber. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/polb.10710] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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43
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Hayashida H, Ishibashi F, Takahata H, Nishio T, Gotoh Y, Sato Y. New process for producing an extrusion laminated film without any chemical primer?non anchor coating extrusion laminating process. POLYM ENG SCI 2004. [DOI: 10.1002/pen.10333] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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44
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Abstract
The interaction of HCl with the D(2)O-ice surface has been investigated in the temperature range 15-200 K by utilizing time-of-flight secondary ion mass spectroscopy, temperature-programmed desorption, and x-ray photoelectron spectroscopy. The intensities of sputtered H(+)(D(2)O) and Cl(-) ions (the H(+) ions) are increased (decreased) markedly above 40 K due to the hydrogen bond formation between the HCl and D(2)O molecules. The HCl molecules which form ionic hydrates undergo H/D exchange at 110-140 K and a considerable fraction of them dissolves into the bulk above 140 K. The neutral hydrates of HCl should coexist as evidenced by the desorption of HCl above 170 K. They are incorporated completely in the D(2)O layer up to 140 K. The HCl molecules embedded in the thick D(2)O layer dissolve into the bulk, and the ionic hydrate tends to segregate to the surface above 150 K.
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Affiliation(s)
- M Kondo
- Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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45
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Okamoto Y, Gotoh Y, Shiraishi H, Nishida M. A human dual-color enzyme-linked immunospot assay for simultaneous detection of interleukin 2- and interleukin 4-secreting cells. Int Immunopharmacol 2004; 4:149-56. [PMID: 14975369 DOI: 10.1016/j.intimp.2003.08.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2003] [Revised: 07/02/2003] [Accepted: 08/25/2003] [Indexed: 11/26/2022]
Abstract
The enzyme-linked immunospot (ELISPOT) assay is an efficient technique for the enumeration of single cells secreting antibodies and cytokines. For simultaneous differentiation of individual cells producing interleukin-2 (IL-2) and interleukin-4 (IL-4) at a single cell level in human peripheral blood mononuclear cells (PBMCs), a human dual-color ELISPOT assay has been optimized. In the present system, the red spots corresponding to IL-2-secreting cells (T helper type 1, Th1, cells) were developed with horseradish peroxidase and the amino ethyl carbazole (AEC)/H2O2. The blue spots corresponding to IL-4-secreting cells (T helper type 2, Th2, cells) were developed with an alkaline phosphatase and the Vector blue. The usefulness of the assay method was tested. With this system, we could detect the IL-2- and IL-4-secreting cells simultaneously in human PBMCs of a juvenile rheumatoid arthritis (JRA) patient. This procedure provides useful information on clinical immune disorders.
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Affiliation(s)
- Y Okamoto
- Division of Health Care Pharmacy, Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan.
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46
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Souda R, Kawanowa H, Kondo M, Gotoh Y. Hydrogen bonding between water and methanol studied by temperature-programmed time-of-flight secondary ion mass spectrometry. J Chem Phys 2003. [DOI: 10.1063/1.1602055] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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47
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Okumura W, Ohkoshi Y, Gotoh Y, Nagura M. Correlation between the tensile properties and network draw ratio of CO2-laser-heated drawn poly(ethylene terephthalate) fibers. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/polb.10467] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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48
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Gotoh Y. Photopic Negative Response of Eyes with Normal-tension Glaucoma. Jpn J Ophthalmol 2003. [DOI: 10.1016/s0021-5155(02)00658-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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49
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Takahashi M, Gotoh Y, Isagawa T, Nishimura T, Goyama E, Kim HS, Mukai H, Ono Y. Regulation of a mitogen-activated protein kinase kinase kinase, MLTK by PKN. J Biochem 2003; 133:181-7. [PMID: 12761180 DOI: 10.1093/jb/mvg022] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
PKNalpha is a fatty acid- and Rho-activated serine/threonine protein kinase having a catalytic domain homologous to members of the protein kinase C family. Recently it was reported that PKNalpha is involved in the p38 mitogen-activated protein kinase (MAPK) signaling pathway. To date, however, how PKNalpha regulates the p38gamma MAPK signaling pathway is unclear. Here we demonstrate that PKNalpha efficiently phosphorylates MLTKalpha (MLK-like mitogen-activated protein triple kinase), which was recently identified as a MAPK kinase kinase (MAPKKK) for the p38 MAPK cascade. Phosphorylation of MLTKalpha by PKNalpha enhances its kinase activity in vitro. Expression of the kinase-negative mutant of PKNalpha inhibited the mobility shift of MLTKalpha caused by osmotic shock in SDS-PAGE. Furthermore, PKNalpha associates with each member of the p38gamma MAPK signaling pathway (p38gamma, MKK6, and MLTKalpha). These results suggest that PKNalpha functions as not only an upstream activator of MLTKalpha but also a putative scaffold protein for the p38gamma MAPK signaling pathway.
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Affiliation(s)
- Mikiko Takahashi
- Biosignal Research Center and Graduate School of Science and Technology, Kobe University, Kobe 657-8501, Japan
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50
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Okumura W, Ohkoshi Y, Gotoh Y, Nagura M, Urakawa H, Kajiwara K. Effects of the drawing form and draw ratio on the fiber structure and mechanical properties of CO2-laser-heated-drawn poly(ethylene terephthalate) fibers. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/polb.10673] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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