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Izumi H, Demura M, Imai A, Ogawa R, Fukuchi M, Okubo T, Tabata T, Mori H, Yoshida T. Developmental synapse pathology triggered by maternal exposure to the herbicide glufosinate ammonium. Front Mol Neurosci 2023; 16:1298238. [PMID: 38098940 PMCID: PMC10720911 DOI: 10.3389/fnmol.2023.1298238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 11/09/2023] [Indexed: 12/17/2023] Open
Abstract
Environmental and genetic factors influence synapse formation. Numerous animal experiments have revealed that pesticides, including herbicides, can disturb normal intracellular signals, gene expression, and individual animal behaviors. However, the mechanism underlying the adverse outcomes of pesticide exposure remains elusive. Herein, we investigated the effect of maternal exposure to the herbicide glufosinate ammonium (GLA) on offspring neuronal synapse formation in vitro. Cultured cerebral cortical neurons prepared from mouse embryos with maternal GLA exposure demonstrated impaired synapse formation induced by synaptic organizer neuroligin 1 (NLGN1)-coated beads. Conversely, the direct administration of GLA to the neuronal cultures exhibited negligible effect on the NLGN1-induced synapse formation. The comparison of the transcriptomes of cultured neurons from embryos treated with maternal GLA or vehicle and a subsequent bioinformatics analysis of differentially expressed genes (DEGs) identified "nervous system development," including "synapse," as the top-ranking process for downregulated DEGs in the GLA group. In addition, we detected lower densities of parvalbumin (Pvalb)-positive neurons at the postnatal developmental stage in the medial prefrontal cortex (mPFC) of offspring born to GLA-exposed dams. These results suggest that maternal GLA exposure induces synapse pathology, with alterations in the expression of genes that regulate synaptic development via an indirect pathway distinct from the effect of direct GLA action on neurons.
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Affiliation(s)
- Hironori Izumi
- Department of Molecular Neuroscience, Faculty of Medicine, University of Toyama, Toyama, Japan
- Research Center for Idling Brain Science, University of Toyama, Toyama, Japan
| | - Maina Demura
- Department of Molecular Neuroscience, Faculty of Medicine, University of Toyama, Toyama, Japan
| | - Ayako Imai
- Department of Molecular Neuroscience, Faculty of Medicine, University of Toyama, Toyama, Japan
- Research Center for Idling Brain Science, University of Toyama, Toyama, Japan
| | - Ryohei Ogawa
- Department of Radiology, Faculty of Medicine, University of Toyama, Toyama, Japan
| | - Mamoru Fukuchi
- Laboratory of Molecular Neuroscience, Faculty of Pharmacy, Takasaki University of Health and Welfare, Gunma, Japan
| | - Taisaku Okubo
- Laboratory for Biological Information Processing, Faculty of Engineering, University of Toyama, Toyama, Japan
| | - Toshihide Tabata
- Laboratory for Biological Information Processing, Faculty of Engineering, University of Toyama, Toyama, Japan
| | - Hisashi Mori
- Department of Molecular Neuroscience, Faculty of Medicine, University of Toyama, Toyama, Japan
- Research Center for Idling Brain Science, University of Toyama, Toyama, Japan
- Research Center for Pre-Disease Science, University of Toyama, Toyama, Japan
| | - Tomoyuki Yoshida
- Department of Molecular Neuroscience, Faculty of Medicine, University of Toyama, Toyama, Japan
- Research Center for Idling Brain Science, University of Toyama, Toyama, Japan
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Saito Y, Kitamura K, Yokoyama A, Tabata T. Assessment of memory recognition using a smartphone-based test system: A pilot study. Medicine (Baltimore) 2023; 102:e35525. [PMID: 37904347 PMCID: PMC10615526 DOI: 10.1097/md.0000000000035525] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 09/15/2023] [Indexed: 11/01/2023] Open
Abstract
BACKGROUND Elucidation of the detailed nature of age-related memory decline requires analysis of memory performance in large populations of various ages. To promote large-scale studies, we developed a smartphone-based self-test for memory recognition. We examined whether this test could detect age-related memory decline and the effects of aerobic exercise on memory. METHODS Seventy-eight younger and 42 older participants were randomly divided into active and passive groups. Both groups took a memory recognition test (consisting of 2 sessions separated by a 48-hour interval) conducted on smartphones. The participants answered the positive and negative affect schedule questionnaire at the beginning and end of each session. In the first session, the participants performed cognitive tasks on 90 photographs displayed on a smartphone screen. Immediately after the cognitive tasks, the active group performed a bout of light aerobic exercise for 10 minutes, while the passive group remained calm for 10 minutes. In the second session, the participants were tested on the recognition of 90 previously observed photographs and 90 distractor photographs. RESULTS Passive older participants had ~40% to ~50% lower recognition scores (RSs) than passive younger participants did. Moreover, the aerobic exercise used in this study improved the RSs of active younger participants by up to ~40% compared with those of passive younger participants, while such an improvement was not observed in older participants. The RS did not depend on the affect levels evaluated using positive and negative affect schedule questionnaire. CONCLUSIONS These results demonstrated that the smartphone-based test could detect age-related decline and could promote behavior modification that may lead to memory enhancement, as reported in previous studies using conventional laboratory tests. The results of the smartphone-based test were not influenced by the subjects affect. This indicates the possibility of large-scale memory studies and healthcare for memory performance by using personal mobile devices.
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Affiliation(s)
- Yukari Saito
- Graduate School of Pharma-Medical Sciences, University of Toyama, Gofuku, Toyama, Toyama, Japan
| | - Kazuki Kitamura
- Graduate School of Science and Engineering, University of Toyama, Gofuku, Toyama, Toyama, Japan
| | | | - Toshihide Tabata
- Laboratory for Biological Information Processing, Faculty of Engineering, University of Toyama, Gofuku, Toyama, Toyama, Japan
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Han SH, Shimada Y, Sadr A, Tagami J, Tabata T, Nakagawa H, Yang SE. Effects of Material Thickness and Pretreatment on the Interfacial Gap of Translucent Zirconia Restorations with Self-adhesive Resin Cement. Oper Dent 2022; 47:535-548. [DOI: 10.2341/21-024-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/16/2021] [Indexed: 11/07/2022]
Abstract
SUMMARY
Purpose
The first objective was to determine if the dual-curing of self-adhesive resin cement (SAC) with reduced light penetrating through zirconia had an effect on interfacial gap of zirconia restorations. The second purpose was to examine whether pretreatment methods for universal adhesive affected interfacial gap. The last aim was to compare the microhardness of SAC polymerized under different zirconia thicknesses.
Methods and Materials
This study evaluated self-adhesive resin cement (RelyX U200, 3M ESPE) after different pretreatment with universal adhesive (Single Bond Universal, 3M ESPE) under different polymerization conditions. CAD/CAM inlay cavities were prepared on extracted third molars. Translucent zirconia restorations were milled using Katana UTML (Kuraray). The teeth were divided into three groups: Groups I, II, and III in which the restoration thicknesses were 1, 2, and 3 mm. Each Group had three subgroups according to different pretreatment methods. For subgroup-1, no pretreatment was done on the prepared cavity. For subgroup-2, universal adhesive was applied and light-cured before cement placement (precure method). For subgroup-3, universal adhesive was applied; however, light-curing was done after cement placement (cocure method). After thermo-cycling, the interfacial gap at the restoration-tooth interface was investigated using swept-source optical coherence tomography imaging. Finally, microhardness was measured for SAC under different zirconia thicknesses. For statistical analysis, the interfacial gap was analyzed using two-way analysis of variance (ANOVA) to test the effect of cavity depth and pretreatment. In terms of each cavity depth and pretreatment, the interfacial gap was compared using one-way ANOVA and Scheffe’s test. One-way ANOVA was also performed for comparison of the Vickers hardness results.
Results
Different thicknesses of the restoration resulted in differences in interfacial gaps except between the precure method of Groups I and II (p<0.05). The effect of universal adhesive pretreatment was different depending on the restoration thickness with exceptions in Groups I and III (p<0.05). Vickers hardness number decreased as the low radiant exposure of light was applied (p<0.05).
Conclusion
Interfacial gap of zirconia restorations can differ depending on the material thickness, pretreatment, and activation mode. Reduced light intensity penetrating through zirconia may lead to higher interfacial gap percentage and lower microhardness of the self-adhesive resin cement. Application of a universal adhesive showed similar or reduced interfacial gaps in the cement space.
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Affiliation(s)
- S-H Han
- Seung-Hoon Han, DDS, PhD, assistant professor, Department of Conservative Dentistry, St Vincent Hospital, College of Medicine, The Catholic University of Korea
| | - Y Shimada
- Yasushi Shimada, DDS, PhD, professor, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - A Sadr
- Alireza Sadr, DDS, PhD, associate professor, Department of Restorative Dentistry, School of Dentistry, University of Washington
| | - J Tagami
- Junji Tagami, DDS, PhD, professor emeritus, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - T Tabata
- Tomoko Tabata, DDS, PhD, assistant professor, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - H Nakagawa
- Hisaichi Nakagawa, DDS, PhD, assistant professor, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - S-E Yang
- *Sung-Eun Yang, DDS, PhD, professor, Department of Conservative Dentistry, Seoul St Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Tsujimura A, Kamae Y, Kawasaki H, Nagai H, Kano M, Tabata T. Carbon powder-filled microelectrode: An easy-to-fabricate probe for cellular electrochemistry. Anal Biochem 2021; 629:114316. [PMID: 34314725 DOI: 10.1016/j.ab.2021.114316] [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] [Received: 12/27/2020] [Revised: 07/05/2021] [Accepted: 07/23/2021] [Indexed: 10/20/2022]
Abstract
Carbon fiber and carbon fiber disc microelectrodes are widely used for electrochemical detection of biochemicals released from cells. However, fabricating these types of microelectrodes is difficult and time-consuming. Here, we report an easy-to-fabricate, carbon powder-filled microelectrode consisting of a pulled glass capillary backfilled with carbon powder. Carbon tip size and responsiveness can be controlled by adjusting the settings of the puller. Carbon powder-filled microelectrodes with tip opening diameters of 7-24 μm detected sub-micromolar to sub-millimolar levels of dopamine and catecholamines released from PC-12 cells. This simple microelectrode should promote further work on cellular and tissue electrochemistry.
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Affiliation(s)
- Asuka Tsujimura
- Laboratory for Biological Information Processing, Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama, 930-8555, Japan.
| | - Yuhi Kamae
- Laboratory for Biological Information Processing, Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama, 930-8555, Japan.
| | - Hikaru Kawasaki
- Laboratory for Biological Information Processing, Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama, 930-8555, Japan.
| | - Haruki Nagai
- Laboratory for Biological Information Processing, Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama, 930-8555, Japan.
| | - Masanobu Kano
- Department of Neurophysiology, Graduate School of Medicine, The University of Tokyo, Tokyo, 113-0033, Japan; International Research Center for Neurointelligence (WPI-IRCN), The University of Tokyo Institutes for Advanced Study (UTIAS), The University of Tokyo, Tokyo, 113-0033, Japan.
| | - Toshihide Tabata
- Laboratory for Biological Information Processing, Faculty of Engineering, University of Toyama, 3190 Gofuku, Toyama, 930-8555, Japan.
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Machida H, Matsuo K, Yamagami W, Ebina Y, Kobayashi Y, Tabata T, Kaneuchi M, Nagase S, Enomoto T, Mikami M. Intraoperative capsule rupture, postoperative chemotherapy, and survival of women with stage I epithelial ovarian cancer: A JSOG-JSGO joint study. Gynecol Oncol 2020. [DOI: 10.1016/j.ygyno.2020.06.127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Sakairi H, Kamikubo Y, Abe M, Ikeda K, Ichiki A, Tabata T, Kano M, Sakurai T. G Protein-Coupled Glutamate and GABA Receptors Form Complexes and Mutually Modulate Their Signals. ACS Chem Neurosci 2020; 11:567-578. [PMID: 31977183 DOI: 10.1021/acschemneuro.9b00599] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Molecular networks containing various proteins mediate many types of cellular processes. Elucidation of how the proteins interact will improve our understanding of the molecular integration and physiological and pharmacological propensities of the network. One of the most complicated and unexplained interactions between proteins is the inter-G protein-coupled receptor (GPCR) interaction. Recently, many studies have suggested that an interaction between neurotransmitter GPCRs may mediate diverse modalities of neural responses. The B-type gamma-aminobutyric acid (GABA) receptor (GBR) and type-1 metabotropic glutamate receptor (mGluR1) are GPCRs for GABA and glutamate, respectively, and each plays distinct roles in controlling neurotransmission. We have previously reported the possibility of their functional interaction in central neurons. Here, we examined the interaction of these GPCRs using stable cell lines and rat cerebella. Cell-surface imaging and coimmunoprecipitation analysis revealed that these GPCRs interact on the cell surface. Furthermore, fluorometry revealed that these GPCRs mutually modulate signal transduction. These findings provide solid evidence that mGluR1 and GBR have intrinsic abilities to form complexes and to mutually modulate signaling. These findings indicate that synaptic plasticity relies on a network of proteins far more complex than previously assumed.
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Affiliation(s)
- Hakushun Sakairi
- Department of Pharmacology, Juntendo University School of Medicine, Hongo 2-1-1, Bunkyo-ku, Tokyo 113-8421, Japan
| | - Yuji Kamikubo
- Department of Pharmacology, Juntendo University School of Medicine, Hongo 2-1-1, Bunkyo-ku, Tokyo 113-8421, Japan
| | - Masayoshi Abe
- Laboratory for Biological Information Processing, Faculty of Engineering and Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555, Japan
| | - Keisuke Ikeda
- Laboratory for Biological Information Processing, Faculty of Engineering and Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555, Japan
| | - Arata Ichiki
- Laboratory for Biological Information Processing, Faculty of Engineering and Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555, Japan
| | - Toshihide Tabata
- Laboratory for Biological Information Processing, Faculty of Engineering and Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555, Japan
| | - Masanobu Kano
- Department of Neurophysiology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Tokyo 113-0033, Japan
| | - Takashi Sakurai
- Department of Pharmacology, Juntendo University School of Medicine, Hongo 2-1-1, Bunkyo-ku, Tokyo 113-8421, Japan
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Amin H, Sasaki N, Yamashita T, Mizoguchi T, Hayashi T, Emoto T, Matsumoto T, Yoshida N, Tabata T, Horibe S, Kawauchi S, Rikitake Y, Hirata K. 1436Overexpression of Cytotoxic T-Lymphocyte Associated Antigen-4 suppresses aortic immunoinflammatory responses and prevents angiotensin II-induced abdominal aortic aneurysm formation in mice. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Aims
Vascular inflammation via T-cell-mediated immune responses has been shown to be critically involved in the pathogenesis of abdominal aortic aneurysm (AAA). T-cell coinhibitory molecule cytotoxic T-lymphocyte–associated antigen-4 (CTLA-4) is known to act as a potent negative regulator of immune responses. However, the role of this molecule in the development of AAA remains completely unknown. In the present study, we determined the effects of CTLA-4 overexpression on experimental AAA.
Methods and results
We continuously infused 12-week-old CTLA-4 transgenic (CTLA-4-Tg)/apolipoprotein E–deficient (Apoe−/−) mice (n=35) or control Apoe−/− mice (n=40) fed a high-cholesterol diet with angiotensin II by implanting osmotic mini-pumps and evaluated the development of AAA. Ninety percent of angiotensin II-infused mice developed AAA, with 50% mortality because of aneurysm rupture. Overexpression of CTLA-4 significantly reduced the incidence (66%), mortality (26%), and diameter (18%) of AAA (incidence: P=0.0104; mortality: P=0.031; diameter: P=0.011). These protective effects were associated with a decreased number of effector CD4+ T cells and the downregulated expression of costimulatory molecules CD80 and CD86, ligands for CTLA-4, on CD11c+ dendritic cells in lymphoid tissues. In addition, by performing in situ zymography of the abdominal aortic aneurysm lesions, we observed a trend toward a decrease in MMP activity in the aneurysmal lesion following overexpression of CTLA-4. Finally, CTLA-4-Tg/Apoe−/− mice had reduced macrophage and CD4+ T cell accumulation and MMP activity in the aneurysmal lesion, leading to attenuated aortic inflammation, preserved vessel integrity, and decreased susceptibility to AAA and aortic rupture.
Conclusion
Our findings suggest that CTLA-4 protects against AAA by suppressing immunoinflammatory responses and could be an attractive therapeutic target for AAA.
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Affiliation(s)
- H Amin
- Faculty of Medicine Universitas Indonesia, Jakarta, Indonesia
| | - N Sasaki
- Kobe Pharmaceutical University, Laboratory of Medical Pharmaceutics, Kobe, Japan
| | - T Yamashita
- Kobe University, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - T Mizoguchi
- Kobe University, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - T Hayashi
- Kobe University, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - T Emoto
- Kobe University, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - T Matsumoto
- Kobe University, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - N Yoshida
- Kobe University, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - T Tabata
- Kobe University, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - S Horibe
- Kobe Pharmaceutical University, Laboratory of Medical Pharmaceutics, Kobe, Japan
| | - S Kawauchi
- Kobe Pharmaceutical University, Laboratory of Medical Pharmaceutics, Kobe, Japan
| | - Y Rikitake
- Kobe Pharmaceutical University, Laboratory of Medical Pharmaceutics, Kobe, Japan
| | - K Hirata
- Kobe University, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
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Machida H, Matsuo K, Yamagami W, Ebina Y, Kobayashi Y, Tabata T, Kaneuchi M, Nagase S, Enomoto T, Mikami M. Trends and characteristics of epithelial ovarian cancer in Japan: JSGO-JSOG joint study. Gynecol Oncol 2019. [DOI: 10.1016/j.ygyno.2019.04.248] [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: 10/26/2022]
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Kaku N, Shimada T, Tabata T, Tagomori H, Abe T, Zhang J, Tsumurai H. Three-dimensional architecture of the ligamentum teres in the human hip joint. Muscles Ligaments Tendons J 2019. [DOI: 10.32098/mltj.03.2017.06] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- N. Kaku
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu City, Oita, Japan
| | - T. Shimada
- Oita College of Judo Therapy and Acupuncture-Moxibustion, Yufu City, Oita, Japan
| | - T. Tabata
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu City, Oita, Japan
| | - H. Tagomori
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu City, Oita, Japan
| | - T. Abe
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu City, Oita, Japan
| | - J.J. Zhang
- Department of Matrix Medicine, Faculty of Medicine, Oita University, Yufu City, Oita, Japan
| | - H. Tsumurai
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu City, Oita, Japan
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Abe T, Kaku N, Tabata T, Tagomori H, Tsumura H. Clinical results of hemiarthroplasty using new bipolar cups for stage 3 or lower osteonecrosis of the femoral head: a retrospective study. Musculoskelet Surg 2018; 102:241-246. [PMID: 29151233 DOI: 10.1007/s12306-017-0524-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 11/09/2017] [Indexed: 06/07/2023]
Abstract
PURPOSE The aim of this study was to evaluate clinical and radiographic findings of stage 3 or lower osteonecrosis of the femoral head (ONFH) with intact acetabular cartilage in patients treated with bipolar hemiarthroplasty (BHA). METHODS A total of 79 hips that underwent BHA for ONFH were included in this study. The average observation period was 7.6 years. Clinical results were evaluated using the Harris hip score. We performed radiographic analysis to assess the migration of the outer cup, the permanent image around the outer cup, and loosening of the stem. RESULTS The total Harris hip score improved from 50 points before surgery to 92 points at final follow-up, while pain improved from 14 points to 36 points. Flexion improved from 94° to 120° and abduction from 27° to 37°. One patient on dialysis showed progress in terms of inward migration, and revision surgery was performed on the patient 14 years after the original surgery. CONCLUSIONS Midterm performance of BHA for stage 3 or lower ONFH at our hospital was good.
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Affiliation(s)
- T Abe
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hazamacho, Yufu, Oita, 879-5593, Japan
| | - N Kaku
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hazamacho, Yufu, Oita, 879-5593, Japan.
| | - T Tabata
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hazamacho, Yufu, Oita, 879-5593, Japan
| | - H Tagomori
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hazamacho, Yufu, Oita, 879-5593, Japan
| | - H Tsumura
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hazamacho, Yufu, Oita, 879-5593, Japan
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Abe M, Kinoshita K, Matsuoka K, Nakada T, Miura K, Hata Y, Nishida N, Tabata T. Lack of modulatory effect of the SCN5A R1193Q polymorphism on cardiac fast Na+ current at body temperature. PLoS One 2018; 13:e0207437. [PMID: 30419068 PMCID: PMC6231685 DOI: 10.1371/journal.pone.0207437] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 10/31/2018] [Indexed: 01/08/2023] Open
Abstract
SCN5A encodes the main subunit of the NaV1.5 channel, which mediates the fast Na+ current responsible for generating cardiac action potentials. The single nucleotide polymorphism SCN5A(R1193Q), which results in an amino acid replacement in the subunit, is common in East Asia. SCN5A(R1193Q) is often identified in patients with type 3 long QT syndrome and Brugada syndrome. However, its linkage to arrhythmic disorders is under debate. Previous electrophysiological studies performed at room temperature inconsistently reported the gain- or loss-of-function effect of SCN5A(R1193Q) on the NaV1.5 channel. More recently, it was theoretically predicted that SCN5A(R1193Q) would exert a loss-of-function effect at body temperature. Here, we experimentally assessed whether SCN5A(R1193Q) modulates the NaV1.5 channel at various temperatures including normal and febrile body temperatures. We compared voltage-gated Na+ currents in SCN5A(R1193Q)-transfected and wild-type SCN5A-transfected HEK293T cells using a whole-cell voltage-clamp technique. First, we made comparisons at constant temperatures of 25°C, 36.5°C, and 38°C, and found no difference in the conductance density, voltage dependence of gating, or time dependence of gating. This suggested that SCN5A(R1193Q) does not modulate the NaV1.5 channel regardless of temperature. Second, we made comparisons while varying the temperature from 38°C to 26°C in 3 min, and again observed no difference in the time course of the amplitude or time dependence of gating during the temperature change. This also indicated that SCN5A(R1193Q) does not modulate the NaV1.5 channel in response to an acute body temperature change. Therefore, SCN5A(R1193Q) may not be a monogenic factor that triggers arrhythmic disorders.
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Affiliation(s)
- Masayoshi Abe
- Laboratory for Biological Information Processing, Graduate School of Science and Engineering, University of Toyama, Toyama City, Toyama, Japan
| | - Koshi Kinoshita
- Department of Legal Medicine, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama, Toyama City, Toyama, Japan
| | - Kenta Matsuoka
- Laboratory for Biological Information Processing, Graduate School of Science and Engineering, University of Toyama, Toyama City, Toyama, Japan
| | - Takahito Nakada
- Laboratory for Biological Information Processing, Graduate School of Science and Engineering, University of Toyama, Toyama City, Toyama, Japan
| | - Kimiaki Miura
- Laboratory for Biological Information Processing, Graduate School of Science and Engineering, University of Toyama, Toyama City, Toyama, Japan
| | - Yukiko Hata
- Department of Legal Medicine, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama, Toyama City, Toyama, Japan
| | - Naoki Nishida
- Department of Legal Medicine, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama, Toyama City, Toyama, Japan
| | - Toshihide Tabata
- Laboratory for Biological Information Processing, Graduate School of Science and Engineering, University of Toyama, Toyama City, Toyama, Japan
- * E-mail:
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Kumagai A, Sasaki T, Matsuoka K, Abe M, Tabata T, Itoh Y, Fuchino H, Wugangerile S, Suga M, Yamaguchi T, Kawahara H, Nagaoka Y, Kawabata K, Furue MK, Takemori H. Monitoring of glutamate-induced excitotoxicity by mitochondrial oxygen consumption. Synapse 2018; 73:e22067. [PMID: 30120794 DOI: 10.1002/syn.22067] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 08/07/2018] [Accepted: 08/14/2018] [Indexed: 12/14/2022]
Abstract
Dysfunction of mitochondrial activity is often associated with the onset and progress of neurodegenerative diseases. Membrane depolarization induced by Na+ influx increases intracellular Ca2+ levels in neurons, which upregulates mitochondrial activity. However, overlimit of Na+ influx and its prolonged retention ultimately cause excitotoxicity leading to neuronal cell death. To return the membrane potential to the normal level, Na+ /K+ -ATPase exchanges intracellular Na+ with extracellular K+ by consuming a large amount of ATP. This is a reason why mitochondria are important for maintaining neurons. In addition, astrocytes are thought to be important for supporting neighboring neurons by acting as energy providers and eliminators of excessive neurotransmitters. In this study, we examined the meaning of changes in the mitochondrial oxygen consumption rate (OCR) in primary mouse neuronal populations. By varying the medium constituents and using channel modulators, we found that pyruvate rather than lactate supported OCR levels and conferred on neurons resistance to glutamate-mediated excitotoxicity. Under a pyruvate-restricted condition, our OCR monitoring could detect excitotoxicity induced by glutamate at only 10 μM. The OCR monitoring also revealed the contribution of the N-methyl-D-aspartate receptor and Na+ /K+ -ATPase to the toxicity, which allowed evaluating spontaneous excitation. In addition, the OCR monitoring showed that astrocytes preferentially used glutamate, not glutamine, for a substrate of the tricarboxylic acid cycle. This mechanism may be coupled with astrocyte-dependent protection of neurons from glutamate-mediated excitotoxicity. These results suggest that OCR monitoring would provide a new powerful tool to analyze the mechanisms underlying neurotoxicity and protection against it.
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Affiliation(s)
- Ayako Kumagai
- Cell Signaling and Metabolic Disease, National Institute of Biomedical Innovation, Health and Nutrition, Osaka, Japan.,Life Science and Biotechnology, Chemistry, Materials and Bioengineering, Kansai University, Osaka, Japan
| | - Tsutomu Sasaki
- Department of Neurology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Kenta Matsuoka
- Laboratory for Biological Information Processing, Graduate School of, Science and Engineering, University of Toyama, Toyama, Japan
| | - Masayoshi Abe
- Laboratory for Biological Information Processing, Graduate School of, Science and Engineering, University of Toyama, Toyama, Japan
| | - Toshihide Tabata
- Laboratory for Biological Information Processing, Graduate School of, Science and Engineering, University of Toyama, Toyama, Japan
| | - Yumi Itoh
- Cell Signaling and Metabolic Disease, National Institute of Biomedical Innovation, Health and Nutrition, Osaka, Japan
| | - Hiroyuki Fuchino
- Research Center for Medicinal Plant Resources, Tukuba Division, National Institutes of Biomedical Innovation, Health and Nutrition, Tsukuba, Japan
| | - Sartagul Wugangerile
- Cell Signaling and Metabolic Disease, National Institute of Biomedical Innovation, Health and Nutrition, Osaka, Japan
| | - Mika Suga
- Stem Cell Cultures, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan
| | - Tomoko Yamaguchi
- Stem Cell Regulation, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan
| | - Hidehisa Kawahara
- Life Science and Biotechnology, Chemistry, Materials and Bioengineering, Kansai University, Osaka, Japan
| | - Yasuo Nagaoka
- Life Science and Biotechnology, Chemistry, Materials and Bioengineering, Kansai University, Osaka, Japan
| | - Kenji Kawabata
- Stem Cell Regulation, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan
| | - Miho Kusuda Furue
- Stem Cell Cultures, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan
| | - Hiroshi Takemori
- Cell Signaling and Metabolic Disease, National Institute of Biomedical Innovation, Health and Nutrition, Osaka, Japan.,Faculty of Engineering, Depaetment of Chemistry and Biomolecular Science, Gifu University, Gifu, Japan
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13
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Yokoyama R, Kinoshita K, Hata Y, Abe M, Matsuoka K, Hirono K, Kano M, Nakazawa M, Ichida F, Nishida N, Tabata T. A mutant HCN4 channel in a family with bradycardia, left bundle branch block, and left ventricular noncompaction. Heart Vessels 2018; 33:802-819. [DOI: 10.1007/s00380-018-1116-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Accepted: 01/05/2018] [Indexed: 01/09/2023]
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14
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Hagiwara A, Hori M, Yokoyama K, Takemura MY, Andica C, Tabata T, Kamagata K, Suzuki M, Kumamaru KK, Nakazawa M, Takano N, Kawasaki H, Hamasaki N, Kunimatsu A, Aoki S. Synthetic MRI in the Detection of Multiple Sclerosis Plaques. AJNR Am J Neuroradiol 2016; 38:257-263. [PMID: 27932506 DOI: 10.3174/ajnr.a5012] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 09/20/2016] [Indexed: 12/21/2022]
Abstract
BACKGROUND AND PURPOSE Synthetic MR imaging enables the creation of various contrast-weighted images including double inversion recovery and phase-sensitive inversion recovery from a single MR imaging quantification scan. Here, we assessed whether synthetic MR imaging is suitable for detecting MS plaques. MATERIALS AND METHODS Quantitative and conventional MR imaging data on 12 patients with MS were retrospectively analyzed. Synthetic T2-weighted, FLAIR, double inversion recovery, and phase-sensitive inversion recovery images were produced after quantification of T1 and T2 values and proton density. Double inversion recovery images were optimized for each patient by adjusting the TI. The number of visible plaques was determined by a radiologist for a set of these 4 types of synthetic MR images and a set of conventional T1-weighted inversion recovery, T2-weighted, and FLAIR images. Conventional 3D double inversion recovery and other available images were used as the criterion standard. The total acquisition time of synthetic MR imaging was 7 minutes 12 seconds and that of conventional MR imaging was 6 minutes 29 seconds The lesion-to-WM contrast and lesion-to-WM contrast-to-noise ratio were calculated and compared between synthetic and conventional double inversion recovery images. RESULTS The total plaques detected by synthetic and conventional MR images were 157 and 139, respectively (P = .014). The lesion-to-WM contrast and contrast-to-noise ratio on synthetic double inversion recovery images were superior to those on conventional double inversion recovery images (P = .001 and < 0.001, respectively). CONCLUSIONS Synthetic MR imaging enabled detection of more MS plaques than conventional MR imaging in a comparable acquisition time. The contrast for MS plaques on synthetic double inversion recovery images was better than on conventional double inversion recovery images.
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Affiliation(s)
- A Hagiwara
- From the Departments of Radiology (A.H., M.H., M.Y.T., C.A., T.T., K.K., M.S., K.K.K., M.N., N.T., H.K., N.H., S.A.) .,Department of Radiology (A.H., A.K.), Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - M Hori
- From the Departments of Radiology (A.H., M.H., M.Y.T., C.A., T.T., K.K., M.S., K.K.K., M.N., N.T., H.K., N.H., S.A.)
| | - K Yokoyama
- Neurology (K.Y.), Juntendo University School of Medicine, Tokyo, Japan
| | - M Y Takemura
- From the Departments of Radiology (A.H., M.H., M.Y.T., C.A., T.T., K.K., M.S., K.K.K., M.N., N.T., H.K., N.H., S.A.)
| | - C Andica
- From the Departments of Radiology (A.H., M.H., M.Y.T., C.A., T.T., K.K., M.S., K.K.K., M.N., N.T., H.K., N.H., S.A.)
| | - T Tabata
- From the Departments of Radiology (A.H., M.H., M.Y.T., C.A., T.T., K.K., M.S., K.K.K., M.N., N.T., H.K., N.H., S.A.)
| | - K Kamagata
- From the Departments of Radiology (A.H., M.H., M.Y.T., C.A., T.T., K.K., M.S., K.K.K., M.N., N.T., H.K., N.H., S.A.)
| | - M Suzuki
- From the Departments of Radiology (A.H., M.H., M.Y.T., C.A., T.T., K.K., M.S., K.K.K., M.N., N.T., H.K., N.H., S.A.)
| | - K K Kumamaru
- From the Departments of Radiology (A.H., M.H., M.Y.T., C.A., T.T., K.K., M.S., K.K.K., M.N., N.T., H.K., N.H., S.A.)
| | - M Nakazawa
- From the Departments of Radiology (A.H., M.H., M.Y.T., C.A., T.T., K.K., M.S., K.K.K., M.N., N.T., H.K., N.H., S.A.).,Department of Radiological Sciences (M.N.), Graduate School of Human Health Sciences, Tokyo Metropolitan University, Tokyo, Japan
| | - N Takano
- From the Departments of Radiology (A.H., M.H., M.Y.T., C.A., T.T., K.K., M.S., K.K.K., M.N., N.T., H.K., N.H., S.A.)
| | - H Kawasaki
- From the Departments of Radiology (A.H., M.H., M.Y.T., C.A., T.T., K.K., M.S., K.K.K., M.N., N.T., H.K., N.H., S.A.)
| | - N Hamasaki
- From the Departments of Radiology (A.H., M.H., M.Y.T., C.A., T.T., K.K., M.S., K.K.K., M.N., N.T., H.K., N.H., S.A.)
| | - A Kunimatsu
- Department of Radiology (A.H., A.K.), Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - S Aoki
- From the Departments of Radiology (A.H., M.H., M.Y.T., C.A., T.T., K.K., M.S., K.K.K., M.N., N.T., H.K., N.H., S.A.)
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15
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Abstract
PURPOSE To compare the past and present bipolar hip arthroplasty (BHA) models in terms of balance between pull-out strength and oscillation angle (OA). METHODS The pull-out strength and OA of 8 BHA models were compared: UPF-II, IBC, and Tandem XLPE (Smith & Nephew); Ringloc x (Biomet); J-FX (DePuy); Bipolar (Nakashima Medical); Multipolar (Zimmer); and Centrax (Stryker). RESULTS Respectively for the UPF-II, IBC, Tandem, Ringloc, J-FX, Nakashima Bipolar, Multipolar, and Centrax, the mean pull-out strength was 2219 N, 3303 N, 1503 N, 951 N, 1453 N, 1856 N, 1536 N, and 753 N, whereas the mean OA was 54.2°, 53.8°, 64.0°, 73.2°, 63.0°, 65.4°, 55.6°, and 75.4°. The OA was lower in the integrated types. For pull-out strength of the locking mechanism, the integrated type (IBC and Nakashima) was stronger than the metal or polyethylene ring-lock type (all others). The pull-out strength and OA were negatively correlated (r= -0.881, p=0.007), and the balance between the 2 varied for different models. CONCLUSION There is a trade-off between the pullout strength and OA; optimal balance between the 2 should be based on each patient's need.
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Affiliation(s)
- N Kaku
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu City, Oita, Japan
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16
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Nonobe Y, Yokoyama T, Kamikubo Y, Yoshida S, Hisajima N, Shinohara H, Shiraishi Y, Sakurai T, Tabata T. Application of surface plasmon resonance imaging to monitoring G protein-coupled receptor signaling and its modulation in a heterologous expression system. BMC Biotechnol 2016; 16:36. [PMID: 27068216 PMCID: PMC4828886 DOI: 10.1186/s12896-016-0266-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [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: 10/22/2015] [Accepted: 04/07/2016] [Indexed: 01/30/2023] Open
Abstract
Background G protein-coupled receptors (GPCRs) are ubiquitous surface proteins mediating various biological responses and thus, important targets for therapeutic drugs. GPCRs individually produce their own signaling as well as modulate the signaling of other GPCRs. Real-time observation of GPCR signaling and modulation in living cells is key to molecular study of biological responses and pharmaceutical development. However, fluorescence imaging, the technique widely used for this purpose, requires a fluorescent dye which may inhibit biological responses or a fluorescent-tagged target protein created through time-consuming genetic manipulation. In this study, we applied two-dimensional surface plasmon resonance (SPR) imaging to monitoring the translocation of protein kinase C (PKC), a major GPCR-coupled signaling molecule in the widely used HEK293 cell lines and examined whether the signaling of, and, modulation between heterologously expressed GPCRs can be measured without fluorescent labeling. Results We cultured HEK293 cells on the gold-plated slide glass and evoked SPR at the interface between the cell’s plasma membrane and the gold surface with incident light. The translocation of activated native PKC to the plasma membrane is expected to alter the incident angle-SPR extent relation, and this could be detected as a change in the intensity of light reflection from the specimen illuminated at a fixed incident angle. Direct activation of PKC with 12-O-tetradecanoylphorbol-13-acetate increased the reflection intensity. This increase indeed reported PKC translocation because it was reduced by a pre-treatment with bisindolylmaleimide-1, a PKC inhibitor. We further applied this technique to a stable HEK293 cell line heterologously expressing the GPCRs type-1 metabotropic glutamate receptor (mGluR1) and adenosine A1 receptor (A1R). (RS)-3,5-dihydroxyphenylglycine, a mGluR1 agonist, increased the reflection intensity, and the PKC inhibitor reduced this increase. A pre-treatment with (R)-N6-phenylisopropyladenosine, an A1R-selective agonist suppressed mGluR1-mediated reflection increase. These results suggest that our technique can detect PKC translocation initiated by ligand binding to mGluR1 and its modulation by A1R. Conclusions SPR imaging turned out to be utilizable for monitoring GPCR-mediated PKC translocation and its modulation by a different GPCR in a heterologous expression system. This technique provides a powerful yet easy-to-use tool for molecular study of biological responses and pharmaceutical development.
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Affiliation(s)
- Yuki Nonobe
- Laboratory for Medical Information Sensing, Graduate School of Science and Engineering, University of Toyama, 3190 Gokufu, Toyama, Toyama, 930-8555, Japan
| | - Tomoki Yokoyama
- Laboratory for Medical Information Sensing, Graduate School of Science and Engineering, University of Toyama, 3190 Gokufu, Toyama, Toyama, 930-8555, Japan
| | - Yuji Kamikubo
- Department of Pharmacology, Juntendo University School of Medicine, Hongo 2-1-1, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Sho Yoshida
- Laboratory for Medical Information Sensing, Graduate School of Science and Engineering, University of Toyama, 3190 Gokufu, Toyama, Toyama, 930-8555, Japan
| | - Nozomi Hisajima
- Laboratory for Medical Information Sensing, Graduate School of Science and Engineering, University of Toyama, 3190 Gokufu, Toyama, Toyama, 930-8555, Japan
| | - Hiroaki Shinohara
- Laboratory for Bioelectronics, Graduate School of Innovative Life Science, University of Toyama, 3190 Gokufu, Toyama, Toyama, 930-8555, Japan
| | - Yuki Shiraishi
- Laboratory for Bioelectronics, Graduate School of Innovative Life Science, University of Toyama, 3190 Gokufu, Toyama, Toyama, 930-8555, Japan
| | - Takashi Sakurai
- Department of Pharmacology, Juntendo University School of Medicine, Hongo 2-1-1, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Toshihide Tabata
- Laboratory for Medical Information Sensing, Graduate School of Science and Engineering, University of Toyama, 3190 Gokufu, Toyama, Toyama, 930-8555, Japan.
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17
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Kinoshita K, Takahashi H, Hata Y, Nishide K, Kato M, Fujita H, Yoshida S, Murai K, Mizumaki K, Nishida K, Yamaguchi Y, Kano M, Tabata T, Nishida N. SCN5A(K817E), a novel Brugada syndrome-associated mutation that alters the activation gating of NaV1.5 channel. Heart Rhythm 2016; 13:1113-1120. [PMID: 26776555 DOI: 10.1016/j.hrthm.2016.01.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Indexed: 01/16/2023]
Abstract
BACKGROUND Brugada syndrome (BrS) is an inherited lethal arrhythmic disorder characterized by syncope and sudden cardiac death from ventricular tachyarrhythmias. Here we identified a novel K817E mutation of SCN5A gene in a man with type 1 BrS electrocardiogram pattern using next-generation sequencing targeted for 73 cardiac disorder-related genes. SCN5A encodes the α-subunit of NaV1.5 voltage-gated Na(+) channel, and some of its mutations are linked to BrS. The proband had no mutation in any of the other arrhythmia-related genes sequenced. OBJECTIVE We investigated whether the K817E mutation causes a functional change of NaV1.5 channel responsible for the BrS phenotype. METHODS We compared the electrophysiological properties of the whole-cell currents mediated by wild-type and mutant channels heterologously expressed in human embryonic kidney 293 cells by using a voltage-clamp technique. RESULTS The K817E mutation reduced the Na(+) current density by 39.0%-91.4% at membrane potentials from -55 to -5 mV. This reduction resulted from a ~24-mV positive shift in the voltage dependence of activation. The mutation also decelerated recovery from both fast and intermediate inactivation, whereas it had little effect on the cell surface expression, single-channel conductance, voltage-dependence of fast inactivation, entry into intermediate inactivation, use-dependent loss of channel availability, or closed-state inactivation. CONCLUSION The K817E mutation of SCN5A gene leads to loss of function of NaV1.5 channel and may underlie the BrS phenotype of the proband.
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Affiliation(s)
- Koshi Kinoshita
- Department of Legal Medicine, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama-shi, Toyama, Japan
| | - Hiroyuki Takahashi
- Laboratory for Neural Information Technology, Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama-shi, Toyama, Japan
| | - Yukiko Hata
- Department of Legal Medicine, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama-shi, Toyama, Japan
| | - Kohki Nishide
- Laboratory for Neural Information Technology, Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama-shi, Toyama, Japan
| | - Mario Kato
- Laboratory for Neural Information Technology, Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama-shi, Toyama, Japan
| | - Hiroki Fujita
- Laboratory for Neural Information Technology, Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama-shi, Toyama, Japan
| | - Sho Yoshida
- Laboratory for Neural Information Technology, Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama-shi, Toyama, Japan
| | - Kazutaka Murai
- Laboratory for Neural Information Technology, Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama-shi, Toyama, Japan
| | - Koichi Mizumaki
- Clinical Research and Ethics Center, University of Toyama, 2630 Sugitani, Toyama-shi, Toyama, Japan
| | - Kunihiro Nishida
- Second Department of Internal Medicine, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama-shi, Toyama, Japan
| | - Yoshiaki Yamaguchi
- Second Department of Internal Medicine, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama-shi, Toyama, Japan
| | - Masanobu Kano
- Department of Neurophysiology, Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, Japan
| | - Toshihide Tabata
- Laboratory for Neural Information Technology, Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama-shi, Toyama, Japan
| | - Naoki Nishida
- Department of Legal Medicine, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama-shi, Toyama, Japan.
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18
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Nakatsuka K, Miki T, Nishizawa Y, Tabata T, Inoue T, Morii H, Ogata E. Circulating bone Gla protein in end-stage renal disease determined by newly developed two-site immunoradiometric assay. Contrib Nephrol 2015; 90:147-54. [PMID: 1959340 DOI: 10.1159/000420137] [Citation(s) in RCA: 9] [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: 12/29/2022]
Abstract
As a marker for bone formation, bone Gla protein (BGP) levels in the circulation have been measured in clinical research and management for metabolic bone diseases. We evaluated the clinical availability of a newly developed two-site immunoradiometric assay (IRMA) for human BGP and determined the serum BGP concentrations using this methodology in patients with abnormal calcium metabolism including those with end-stage renal disease undergoing maintenance dialysis. A cross-reactivity test revealed that this assay system specifically recognizes intact molecules (1-49) of BGP and excludes fragments of the molecules (1-19, 12-33, 23-33). Serum BGP levels in dialysis patients were positively correlated with those by conventional radioimmunoassay (RIA) (r = 0.918, p less than 0.00001, n = 37) as well as normal individuals (r = 0.935, p less than 0.0001, n = 16). However, the levels of BGP determined by IRMA were estimated to be significantly lower than those by RIA (23.6 +/- 9.8 vs. 29.6 +/- 9.1 ng/ml, p less than 0.00001). These results suggest that this IRMA system, with a rapid and easy procedure, excludes fragment forms of BGP in the circulation, which are found in uremic sera and probably attributed to increased bone resorption. Further studies are needed to ensure that serum intact BGP levels mainly reflect BGP production in osteoblasts, particularly in end-stage renal disease.
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Affiliation(s)
- K Nakatsuka
- Second Department of Internal Medicine, Osaka City University Medical School, Japan
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19
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Kunimoto M, Tamura S, Yoshie O, Tabata T. Epstein-Barr virus in Waldeyer's lymphatic tissue. Adv Otorhinolaryngol 2015; 47:151-60. [PMID: 1333723 DOI: 10.1159/000421735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- M Kunimoto
- Department of Otorhinolaryngology, Wakayama Medical College, Japan
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20
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Tabata T. The concept of focal infection of tonsil. Adv Otorhinolaryngol 2015; 47:193-5. [PMID: 1456133 DOI: 10.1159/000421743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- T Tabata
- Department of Otorhinolaryngology, Wakayama Medical College, Japan
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21
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Affiliation(s)
- K Kuki
- Department of Otolaryngology, Wakayama Medical College, Japan
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22
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Affiliation(s)
- M Kimura
- Department of Anatomy, Kansai Shinkyu College, Osaka, Japan
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23
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Hisajima N, Hata Y, Kinoshita K, Fukushima T, Nishida N, Kano M, Tabata T. The Susceptibilities of Human Ether-à-Go-Go-Related Gene Channel with the G487R Mutation to Arrhythmogenic Factors. Biol Pharm Bull 2015; 38:781-4. [DOI: 10.1248/bpb.b14-00630] [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] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Nozomi Hisajima
- Laboratory for Neural Information Technology, Graduate School of Science and Engineering, University of Toyama
| | - Yukiko Hata
- Department of Legal Medicine, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama
| | - Koshi Kinoshita
- Department of Legal Medicine, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama
| | - Toshiki Fukushima
- Laboratory for Neural Information Technology, Graduate School of Science and Engineering, University of Toyama
| | - Naoki Nishida
- Department of Legal Medicine, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama
| | - Masanobu Kano
- Department of Neurophysiology, Graduate School of Medicine, The University of Tokyo
| | - Toshihide Tabata
- Laboratory for Neural Information Technology, Graduate School of Science and Engineering, University of Toyama
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Rothuizen TC, Ocak G, Verschuren JJ, Dekker FW, Rabelink TJ, Jukema JW, Rotmans JI, Silva V, Raimann JG, Grassmann A, Marcelli D, Usvyat L, Canaud B, Kotanko P, Pecoits-Filho R, Consortium M, Strippoli GF, Sue YM, Tang CH, Chen TH, Hong CY, Ochi A, Ishimura E, Masuda M, Tsujimoto Y, Okuno S, Tabata T, Nishizawa Y, Inaba M, Moon Ki H, Do Hyoung K, Min Jee H, Hyun K, Wang Soo L, Su-Hyun K, Selim G, Stojceva-Taneva O, Tozija L, Dzekova-Vidimliski P, Trajceska L, Gelev S, Amitov V, Petronievic Z, Sikole A, Kee YK, Kim YL, Han JH, Oh HJ, Park JT, Han SH, Yoo TH, Kang SW, Okute Y, Shoji T, Sonoda M, Kuwamura Y, Tsujimoto Y, Tabata T, Shioi A, Tahara H, Emoto M, Inaba M, El Amrani M, Asserraji M, Benyahia M, Galloway PA, Yiu V, Hiemstra TF, Nilssen C, Zannad F, Jardine A, Schmieder R, Fellstrom B, Holdaas H, Mjoen G, Eftimovska - Otovic N, Babalj - Banskolieva E, Bogdanoska - Kostadinoska S, Grozdanovski R, Silva BC, Freitas GR, Silva VB, Abensur H, Luders C, Pereira BJ, Castro MC, Oliveira RB, Moyses RM, Elias RM, Perez De Jose A, Abad S, Vega A, Reque J, Quiroga B, Lopez-Gomez JM, Sasaki K, Yamguchi K, Hesaka A, Iwahashi E, Sakai S, Fujimoto T, Minami S, Fujita Y, Yokoyama K, Kidir V, Ersoy I, Altuntas A, Inal S, Do an A, Sezer MT, Azar H, Chacra D, Dabar G, Chelala D, Zhao L, Huang S, Liang T, Tang H, Turkmen K, Demirtas L, Akbas EM, Buyuklu M, Bakirci E, Kocyigit I, Ozcelik O, Guney I, Mumajesi S, Velaj A, Idrizi A, Pasko N, Cadri V, Barbullushi M, Bolleku E, Strakosh A, Cenaj A, Kacori V, Zekollari E, Rista E, Dusha D, Belba A, Thereska N, Gelev S, Toshev S, Trajceska L, Pavleska S, Selim G, Dzekova P, Shikole A, Naess H, Fellstrom B, Jardine AG, Schmieder RE, Zannad F, Holdaas H, Mjoen G, Sasaki K, Yamguchi S, Hesaka A, Iwahashi E, Sakai S, Fujimoto T, Minami S, Fujita Y, Yokoyama K, Bilevich O, Bunova S, Semchenko S, Schwermer K, Hoppe K, Klysz P, Baum E, Sikorska D, Radziszewska D, Sawatiuk P, Olejniczak P, Pawlaczyk K, Lindholm B, Oko A, El Amrani M, Asserraji M, Rbaibi A, El Kharass A, Benyahia M, Rroji ( Molla) M, Seferi S, Cafka M, Spahia N, Likaj E, Thereska N, Barbullushi M, Pelletier CC, Jolivot A, Kalbacher E, Panaye M, Bureau Du Colombier P, Juillard L, Burmeister JE, Mosmann CB, Bastos JP, Burmeister BO, Munaro G, Pereira JD, Youssef DW, Rosito GA. DIALYSIS CARDIOVASCULAR COMPLICATIONS 2. Nephrol Dial Transplant 2014. [DOI: 10.1093/ndt/gfu175] [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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25
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Kinoshita K, Komatsu T, Nishide K, Hata Y, Hisajima N, Takahashi H, Kimoto K, Aonuma K, Tsushima E, Tabata T, Yoshida T, Mori H, Nishida K, Yamaguchi Y, Ichida F, Fukurotani K, Inoue H, Nishida N. A590T mutation in KCNQ1 C-terminal helix D decreases IKs channel trafficking and function but not Yotiao interaction. J Mol Cell Cardiol 2014; 72:273-80. [PMID: 24713462 DOI: 10.1016/j.yjmcc.2014.03.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 02/28/2014] [Accepted: 03/26/2014] [Indexed: 12/21/2022]
Abstract
KCNQ1 encodes the α subunit of the voltage-gated channel that mediates the cardiac slow delayed rectifier K(+) current (IKs). Here, we report a KCNQ1 allele encoding an A590T mutation [KCNQ1(A590T)] found in a 39-year-old female with a mild QT prolongation. A590 is located in the C-terminal α helical region of KCNQ1 that mediates subunit tetramerization, membrane trafficking, and interaction with Yotiao. This interaction is known to be required for the proper modulation of IKs by cAMP. Since previous studies reported that mutations in the vicinity of A590 impair IKs channel surface expression and function, we examined whether and how the A590T mutation affects the IKs channel. Electrophysiological measurements in HEK-293T cells showed that the A590T mutation caused a reduction in IKs density and a right-shift of the current-voltage relation of channel activation. Immunocytochemical and immunoblot analyses showed the reduced cell surface expression of KCNQ1(A590T) subunit and its rescue by coexpression of the wild-type KCNQ1 [KCNQ1(WT)] subunit. Moreover, KCNQ1(A590T) subunit interacted with Yotiao and had a cAMP-responsiveness comparable to that of KCNQ1(WT) subunit. These findings indicate that the A590 of KCNQ1 subunit plays important roles in the maintenance of channel surface expression and function via a novel mechanism independent of interaction with Yotiao.
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Affiliation(s)
- Koshi Kinoshita
- Department of Legal Medicine, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, Toyama 930-0194, Japan
| | - Takuto Komatsu
- Laboratory for Neural Information Technology, Graduate School of Sciences and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555, Japan
| | - Kohki Nishide
- Laboratory for Neural Information Technology, Graduate School of Sciences and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555, Japan
| | - Yukiko Hata
- Department of Legal Medicine, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, Toyama 930-0194, Japan
| | - Nozomi Hisajima
- Laboratory for Neural Information Technology, Graduate School of Sciences and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555, Japan
| | - Hiroyuki Takahashi
- Laboratory for Neural Information Technology, Graduate School of Sciences and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555, Japan
| | - Katsuya Kimoto
- Laboratory for Neural Information Technology, Graduate School of Sciences and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555, Japan
| | - Kei Aonuma
- Laboratory for Neural Information Technology, Graduate School of Sciences and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555, Japan
| | - Eikichi Tsushima
- Laboratory for Neural Information Technology, Graduate School of Sciences and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555, Japan
| | - Toshihide Tabata
- Laboratory for Neural Information Technology, Graduate School of Sciences and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555, Japan
| | - Tomoyuki Yoshida
- Department of Molecular Neurosciences, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, Toyama 930-0194, Japan
| | - Hisashi Mori
- Department of Molecular Neurosciences, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, Toyama 930-0194, Japan
| | - Kunihiro Nishida
- Second Department of Internal Medicine, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, Toyama 930-0194, Japan
| | - Yoshiaki Yamaguchi
- Second Department of Internal Medicine, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, Toyama 930-0194, Japan
| | - Fukiko Ichida
- Department of Pediatrics, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, Toyama 930-0194, Japan
| | - Kenkichi Fukurotani
- Laboratory for Neural Information Technology, Graduate School of Sciences and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555, Japan
| | - Hiroshi Inoue
- Second Department of Internal Medicine, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, Toyama 930-0194, Japan
| | - Naoki Nishida
- Department of Legal Medicine, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, Toyama 930-0194, Japan.
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Yamaguchi Y, Nishide K, Kato M, Hata Y, Mizumaki K, Kinoshita K, Nonobe Y, Tabata T, Sakamoto T, Kataoka N, Nakatani Y, Ichida F, Mori H, Fukurotani K, Inoue H, Nishida N. Glycine/Serine polymorphism at position 38 influences KCNE1 subunit's modulatory actions on rapid and slow delayed rectifier K+ currents. Circ J 2014; 78:610-8. [PMID: 24419801 DOI: 10.1253/circj.cj-13-1126] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND KCNE1 encodes a modulator of KCNH2 and KCNQ1 delayed rectifier K(+) current channels. KCNE1 mutations might cause long QT syndrome (LQTS) by impairing KCNE1 subunit's modulatory actions on these channels. There are major and minor polymorphismic KCNE1 variants whose 38(th) amino acids are glycine and serine [KCNE1(38G) and KCNE1(38S) subunits], respectively. Despite its frequent occurrence, the influence of this polymorphism on the K(+) channels' function is unclear. METHODS AND RESULTS Patch-clamp recordings were obtained from human embryonic kidney -293T cells. KCNH2 channel current density in KCNE1(38S)-transfected cells was smaller than that in KCNE1(38G)-transfected cells by 34%. The voltage-sensitivity of the KCNQ1 channel current in KCNE1(38S)-transfected cells was lowered compared to that in KCNE1(38G)-transfected cells, with a +13mV shift in the half-maximal activation voltage. KCNH2 channel current density or KCNQ1 channel voltage-sensitivity was not different between KCNE1(38G)-transfected cells and cells transfected with both KCNE1(38G) and KCNE1(38S). Moreover, the KCNH2 channel current in KCNE1(38S)-transfected cells was more susceptible to E4031, a QT prolonging drug and a condition with hypokalemia, than that in KCNE1(38G)-transfected cells. CONCLUSIONS Homozygous inheritance of KCNE1(38S) might cause a mild reduction of the delayed rectifier K(+) currents and might thereby increase an arrhythmogenic potential particularly in the presence of QT prolonging factors. By contrast, heterozygous inheritance of KCNE1(38G) and KCNE1(38S) might not affect the K(+) currents significantly. (Circ J 2014; 78: 610-618).
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Ohuchi M, Hashimoto K, Ushiba A, Kishimoto T, Yamane T, Hamamoto T, Tabata T, Tsujita Y, Matsushiga M, Takahashi K, Matsumura K, Fujino K, Eguchi Y. Plasma platelet-derived microparticles to platelet count ratio as a marker of mortality in critically ill patients. Crit Care 2014. [PMCID: PMC4068881 DOI: 10.1186/cc13400] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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28
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Tabata T, Yamaguchi Y, Hata Y, Ichida F, Mori H. Modification of <i>KCNH2</i>-Encoded Cardiac Potassium Channels by KCNE1 Polymorphism. Circ J 2014; 78:2331. [DOI: 10.1253/circj.cj-14-0654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Toshihide Tabata
- Laboratory for Neural Information Technology, Graduate School of Sciences and Engineering, University of Toyama
| | | | - Yukiko Hata
- Department of Legal Medicine, University of Toyama
| | | | - Hisashi Mori
- Department of Molecular Neurosciences, University of Toyama
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Shirai Y, Sasajima T, Uchiyama S, Takegoshi Y, Tsushima E, Tabata T. [Activation of cerebellar B-type γ-aminobutyric acid receptor modulates optokinetic reflex adaptation]. YAKUGAKU ZASSHI 2013; 134:439-45. [PMID: 24304601 DOI: 10.1248/yakushi.13-00233] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The cerebellar cortex, the brain region responsible for motor coordination and learning expresses a high density of B-type γ-aminobutyric acid receptor (GABAbR). Previous in vitro and in situ studies indicated that cerebellar GABAbR may mediate multiple forms of inhibitory and excitatory modulation of cerebellar circuits. Nevertheless, the in vivo influence of cerebellar GABAbR activation is unclear. As the first step in addressing this issue, we examined how pharmacological activation of cerebellar GABAbR modulates optokinetic reflex (OKR), an involuntary cerebellum-dependent eye movement for stabilizing the retinal image against the drift of the visual scene. We injected baclofen, a GABAbR-selective agonist, or control saline into the cerebellar flocculi of adult mice and then performed 1-h OKR measurement sessions on two consecutive days. In the day 1 session, the baclofen (5 nM)-injected mice and control mice showed similar initial OKR gains and similar training-induced increases in the OKR gain (OKR adaptation). This result suggests that GABAbR activation does not affect cerebellar computation for executing OKR and formation of short-term memory for OKR adaptation. At the beginning of the day 2 session, the baclofen (5 nM or 50 μM)-injected mice showed an OKR gain higher than that achieved in the day 1 session while the control mice did not. This result suggests that GABAbR activation may facilitate the formation of OKR adaptation-related long-term memory. These findings provide a new insight into the functional architecture of the cerebellar circuits and indicate GABAbR to be a new target of pharmacological therapy against diseases with cerebellar dysfunction.
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Affiliation(s)
- Yoshihiro Shirai
- Laboratory for Neural Information Technology, Graduate School of Sciences and Engineering, University of Toyama
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30
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Takano M, Yamamoto K, Tabata T, Minegishi Y, Yokoyama T, Morita S, Ando Y, Sugiyama T, Ohashi Y, Sakata Y. Evaluation of UGT1A1 Genotyping for Predicting Individual Toxicity of Irinotecan Plus Platinum Analog Regimens. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt460.151] [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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31
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Kimoto K, Kinoshita K, Yokoyama T, Hata Y, Komatsu T, Tsushima E, Nishide K, Yamaguchi Y, Mizumaki K, Tabata T, Inoue H, Nishida N, Fukurotani K. Characterization of a novel mutant KCNQ1 channel subunit lacking a large part of the C-terminal domain. Biochem Biophys Res Commun 2013; 440:283-8. [PMID: 24070608 DOI: 10.1016/j.bbrc.2013.09.075] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Accepted: 09/13/2013] [Indexed: 11/25/2022]
Abstract
A mutation of KCNQ1 gene encoding the alpha subunit of the channel mediating the slow delayed rectifier K(+) current in cardiomyocytes may cause severe arrhythmic disorders. We identified KCNQ1(Y461X), a novel mutant gene encoding KCNQ1 subunit whose C-terminal domain is truncated at tyrosine 461 from a man with a mild QT interval prolongation. We made whole-cell voltage-clamp recordings from HEK-293T cells transfected with either of wild-type KCNQ1 [KCNQ1(WT)], KCNQ1(Y461X), or their mixture plus KCNE1 auxiliary subunit gene. The KCNQ1(Y461X)-transfected cells showed no delayed rectifying current. The cells transfected with both KCNQ1(WT) and KCNQ1(Y461X) showed the delayed rectifying current that is thought to be mediated largely by homomeric channel consisting of KCNQ1(WT) subunit because its voltage-dependence of activation, activation rate, and deactivation rate were similar to the current in the KCNQ1(WT)-transfected cells. The immunoblots of HEK-293T cell-derived lysates showed that KCNQ1(Y461X) subunit cannot form channel tetramers by itself or with KCNQ1(WT) subunit. Moreover, immunocytochemical analysis in HEK-293T cells showed that the surface expression level of KCNQ1(Y461X) subunit was very low with or without KCNQ1(WT) subunit. These findings suggest that the massive loss of the C-terminal domain of KCNQ1 subunit impairs the assembly, trafficking, and function of the mutant subunit-containing channels, whereas the mutant subunit does not interfere with the functional expression of the homomeric wild-type channel. Therefore, the homozygous but not heterozygous inheritance of KCNQ1(Y461X) might cause major arrhythmic disorders. This study provides a new insight into the structure-function relation of KCNQ1 channel and treatments of cardiac channelopathies.
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Affiliation(s)
- Katsuya Kimoto
- Laboratory for Neural Information Technology, Graduate School of Sciences and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
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Shirai Y, Asano K, Takegoshi Y, Uchiyama S, Nonobe Y, Tabata T. A simple machine vision-driven system for measuring optokinetic reflex in small animals. J Physiol Sci 2013; 63:395-9. [PMID: 23824466 PMCID: PMC10717073 DOI: 10.1007/s12576-013-0276-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2012] [Accepted: 06/09/2013] [Indexed: 11/30/2022]
Abstract
The optokinetic reflex (OKR) is useful to monitor the function of the visual and motor nervous systems. However, OKR measurement is not open to all because dedicated commercial equipment or detailed instructions for building in-house equipment is rarely offered. Here we describe the design of an easy-to-install/use yet reliable OKR measuring system including a computer program to visually locate the pupil and a mathematical procedure to estimate the pupil azimuth from the location data. The pupil locating program was created on a low-cost machine vision development platform, whose graphical user interface allows one to compose and operate the program without programming expertise. Our system located mouse pupils at a high success rate (~90 %), estimated their azimuth precisely (~94 %), and detected changes in OKR gain due to the pharmacological modulation of the cerebellar flocculi. The system would promote behavioral assessment in physiology, pharmacology, and genetics.
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Affiliation(s)
- Yoshihiro Shirai
- Laboratory for Neural Information Technology, Graduate School of Sciences and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555 Japan
- Present Address: Mitsubishi Electric Tokki Systems Corporation, 1-15-9 Osaki, Shinagawa-ku, Tokyo, 141-0032 Japan
| | - Kenta Asano
- Laboratory for Neural Information Technology, Graduate School of Sciences and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555 Japan
| | - Yoshihiro Takegoshi
- Laboratory for Neural Information Technology, Graduate School of Sciences and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555 Japan
| | - Shu Uchiyama
- Laboratory for Neural Information Technology, Graduate School of Sciences and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555 Japan
| | - Yuki Nonobe
- Laboratory for Neural Information Technology, Graduate School of Sciences and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555 Japan
| | - Toshihide Tabata
- Laboratory for Neural Information Technology, Graduate School of Sciences and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-8555 Japan
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Kinoshita K, Kimoto K, Komatsu T, Nishide K, Tabata T, Ichida F, Yamaguchi Y, Nishida K, Inoue H, Hata Y, Nishida N. Abstract 049: Functional Characterization of KCNQ1 Channel Subunit With an A590T Mutation. Circ Res 2013. [DOI: 10.1161/res.113.suppl_1.a049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background:
KCNQ1
encodes the alpha subunit of the voltage-gated K
+
channel that mediates the cardiac slow delayed rectifier K
+
current (I
Ks
). A mutation, A590T, in
KCNQ1
was incidentally identified in a 40 years old female. She had a mild QTc prolongation in electrocardiogram but has never experienced any cardiac events. A590 is located in the C-terminal domain forming a coiled-coil structure, which has been suggested as a pivotal component for subunit tetramerization and channel trafficking to the cell surface. The previously reported mutations around A590 result in markedly reduced cell surface expression and loss of functional channel. We, for the first time, examined whether and how the A590T mutation affects the I
Ks
channel function.
Methods:
To assess the trafficking and channel function of KCNQ1(A590T) mutant subunit, we performed immunostaining, immunoblotting, and voltage-clamp measurements in HEK-293T cells transfected with wild-type or the A590T mutant
KCNQ1
or their mixture (WT, A590T, and A590T/WT cells, respectively).
Results:
The density of a depolarization-activated current in the A590T cells was smaller than that in the WT cells. The threshold, half-maximal activation, and saturating voltages of the depolarization-activated current in the A590T cells were more positive than those in the WT cells. The immunoreactivity against KCNQ1 subunit on the cell surface in the A590T cells is lower than in WT cells. The A590T/WT cells had a similar density of the depolarization-activated current and a similar level of immunoreactivity against the channel subunit to the WT cells. Furthermore, the immunoblotting detected subunit oligomers in the membrane fraction of the A590T cells while their densities were lower than those of the WT cells.
Conclusion:
Although the A590T mutant subunit can form oligomers for itself, this subunit is not efficiently trafficked to the cell surface without the aid of the WT subunit. Thus, homozygous inheritance of the mutant
KCNQ1
might be pathogenic. By contrast, the cells expressing both the mutant and wild-type KCNQ1 subunit had normal I
Ks
and cell surface expression, indicating that the heterozygous inheritance of the mutant
KCNQ1
might not cause severe cardiac diseases.
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Affiliation(s)
- Koshi Kinoshita
- Dept of Legal Medicine, Graduate Sch of Medicine, Univ of Toyama, Toyama, Japan
| | - Katsuya Kimoto
- Laboratory of Neural Information Technology, Graduate Sch of Engineering, Univ of Toyama, Toyama, Japan
| | - Takuto Komatsu
- Laboratory of Neural Information Technology, Graduate Sch of Engineering, Univ of Toyama, Toyama, Japan
| | - Kohki Nishide
- Laboratory of Neural Information Technology, Graduate Sch of Engineering, Univ of Toyama, Toyama, Japan
| | - Toshihide Tabata
- Laboratory of Neural Information Technology, Graduate Sch of Engineering, Univ of Toyama, Toyama, Japan
| | - Fukiko Ichida
- Dept of Pediatrics, Sch of Medicine, Univ of Toyama, Toyama, Japan
| | - Yoshiaki Yamaguchi
- Second Dept of Internal Medicine, Sch of Medicine, Univ of Toyama, Toyama, Japan
| | - Kunihiro Nishida
- Second Dept of Internal Medicine, Sch of Medicine, Univ of Toyama, Toyama, Japan
| | - Hiroshi Inoue
- Second Dept of Internal Medicine, Sch of Medicine, Univ of Toyama, Toyama, Japan
| | - Yukiko Hata
- Dept of Legal Medicine, Graduate Sch of Medicine, Univ of Toyama, Toyama, Japan
| | - Naoki Nishida
- Dept of Legal Medicine, Graduate Sch of Medicine, Univ of Toyama, Toyama, Japan
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Gelev S, Toshev S, Trajceska L, Pavleska S, Selim G, Dzekova P, Shikole A, Gelev S, Toshev S, Trajceska L, Pavleska S, Selim G, Dzekova P, Shikole A, Ulu SM, Yilmaz F, Ahsen A, Akci A, Yuksel S, Mihaescu A, Olariu N, Avram C, Schiller O, Schiller A, Xiao DM, Niu JY, Gu Y, Drechsler C, van den Broek H, Vervloet M, Hoekstra T, Dekker F, Ketteler M, Brandenburg V, Turkvatan A, Kirkpantur A, Mandiroglu S, Afsar B, Seloglu B, Alkis M, Erkula S, GURBUZ H, Serin M, CALIK Y, Mandiroglu F, Balci M, Choi BS, Choi SR, Park HS, Hong YA, Chung BH, Kim YS, Yang CW, Kim YS, Park CW, Jung JY, Sung JY, Kim AJ, Kim HS, Lee C, Ro H, Chang JH, Lee HH, Chung W, Sezer S, Bal Z, Tutal E, Bal U, Erkmen Uyar M, Ozdemir Acar N, Karakas Y, Sahin G, Urfali F, Bal C, Akcar Degirmenci N, Sirmagul B, Janda K, Krzanowski M, Dumnicka P, Kusnierz-Cabala B, Sulowicz W, Balci M, Kirkpantur A, Mandiroglu S, Afsar B, Seloglu B, Alkis M, Serin M, CALIK Y, Erkula S, GURBUZ H, Mandiroglu F, Turkvatan A, Valtuille RA, Gonzalez MS, Casos ME, Yoshida T, Yamashita M, Hayashi M, Raikou VD, Tentolouris N, Makropoulos I, Kaisidis P, Boletis JN, Abdalla AA, Roche D, Forbes JF, Hannigan A, Hegarty A, Cronin CJ, Casserly LF, Stack AG, Guinsburg A, Raimann JG, Usvyat L, Kooman J, Marelli C, Etter M, Marcelli D, Levin NW, Kotanko P, Kim CS, Choi JS, Bae EH, Ma SK, Kim SW, Ryu JH, Lee S, Ryu DR, Kim SJ, Kang DH, Choi KB, Shoji T, Tsuchikura S, Shimomura N, Kakiya R, Tsujimoto Y, Tabata T, Emoto M, Nishizawa Y, Inaba M, Selim G, Stojceva-Taneva O, Tozija L, Georgievska-Ismail L, Gelev S, Dzekova-Vidimliski P, Trajceska L, Petronievic Z, Sikole A, Wu CJ, Pan CF, Chen HH, Lin CJ, Kim Y, Kim JK, Song YR, Kim SG, Kim HJ, Kuwahara M, Bannai K, Kikuchi K, Yamato H, Segawa H, Miyamoto KI, De Mauri A, Chiarinotti D, Ruva CE, David P, Capurro F, De Leo M, Han JH, Kim HR, Ko KI, Kim CH, Koo HM, Doh FM, Lee MJ, Oh HJ, Han SH, Yoo TH, Choi KH, Kang SW, Shibata K, Sohara H, Kuji T, Kawata S, Kogudhi N, Nishihara M, Satta H, Jung JY, Ro H, Lee C, Kim SM, Kim AJ, Kim HS, Chang JH, Lee HH, Chung W, Kramann R, Erpenbeck J, Becker M, Brandenburg V, Kruger T, Marx N, Floege J, Schlieper G, Power A, Fogarty D, Wheeler D, Kerschbaum J, Schwarz CP, Mayer G, Prajitno CW, Matsuzawa R, Matsunaga A, Ishii A, Abe Y, Yoneki K, Harada M, Takagi Y, Yoshida A, Takahira N, Sirch J, Pfeiffer S, Fischlein T, El-Nahid MS, Issac MS, Bal Z, Tutal E, Bal U, Erkmen Uyar M, Guliyev O, Sayin B, Sezer S, Bajari T, Hermann M, Gmeiner B, Regele H, Aumayr K, Gensberger ET, Scharrer S, Sengoge G, Novo A, Tania S, Anes E, Domingues A, Mendes E, Batista G, Viana J, Rroji M, Cafka M, Seferi S, Seiti J, Petrela E, Likaj E, Thereska N, Selim G, Stojceva-Taneva O, Tozija L, Georgievska-Ismail L, Gelev S, Dzekova-Vidimliski P, Trajceska L, Petronievic Z, Sikole A, Turkmen K, Ozcicek F, Erdur F, Turk S, Yeksan M, Tonbul H, Castellano S, Palomares I, Merello JI, Mandiroglu S, Torkvatan A, Balci M, Seloglu B, Alkis M, Serin M, Erkula S, Gurbuz H, Calik Y, Afsar B, Mandiroglu F, Kirkpantur A, Ulusal Okyay G, Okyay K, Polattas Solak E, Sahinaslan A, Pasaoglu O, Ayerden Ebinc F, Boztepe Derici U, Sindel S, Arinsoy T, Lee YK, Son SY, Choi MJ, Lee SM, Yoon JW, Koo JR, Noh JW, Vaziri ND, Matias P, Amaral T, Ferreira AC, Mendes M, Azevedo A, Jorge C, Aires I, Gil C, Ferreira A, Carretero Dios D, Merello Godino JI, Moran Risco JE, Castellano Gasch S, Schwermer K, Hoppe K, Klysz P, Radziszewska D, Sikorska D, Nealis J, Polcyn-Adamczak M, Zaremba-Drobnik D, Pawlaczyk K, Oko A, Mentese A, Yavuz A, Karahan C, Sumer A, Ozkan G, Ulusoy S, Yildiz G, Duman A, Aydin H, Yilmaz A, Hur E, Magden K, Cetin G, Candan F, Franczyk-Skora B, Gluba A, Kowalczyk M, Banach M, Rysz J, Novo A, Domingues A, Preto L, Sousa T, Mendes E, Batista G, Vaz J, Oue M, Kuragano T, Hamahata S, Fukao W, Toyoda K, Nakanishi T, Otsubo S, Tsuchiya K, Akiba T, Nitta K, Afsar B, Saglam M, Yuceturk C, Agca E, Tosic J, Djuric Z, Popovic J, Buzadzic I, Djuric P, Jankovic A, Dimkovic N, Simone S, Dell'Oglio MP, Ciccone M, Castellano G, Corciulo R, Balestra C, Giangrande M, Gigante M, Grandaliano G, Gesualdo L, Pertosa GP, Mohamed EA, Marouane B, Mohamed Reda EF, Aziz R, Hicham B, Youssef B, Abdennasser EK, Salaheddine T, Mohammed A, Hwang JC, Jiang MY, Lu YH, Wang CT, Grzegorzewska A, Cieszynski K, Niepolski L, Sowinska A, Abdallah E, Al-Helal B, Waked E, Abdel-Khalik A, Nabil M, El-Shanawany F, Tekce H, Kursat S, Bahadir Colak H, Aktas G, Ozcicek A, Turkmen K, Ozcicek F, Akbas E, Demirtas L, Ozbicer A, Cetinkay R, Capoglu I, Valocikova I, Valocik G, Vachalcova M, Kolesarova E, Nowak A, Friedrich B, Artunc F, Serra A, Breidthardt T, Twerenbold R, Peter M, Potocki M, Muller C. Cardiovascular complications in CKD 5D. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft147] [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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Tani T, Shimizu T, Obata T, Tabata T, Eguchi Y, Shoji H, Akabori H, Sonoda H, Endo Y. O-15 DIRECT-HEMOPERFUSION WITH POLYMYXIN-B IMMOBILIZED FIBER REDUCES PLASMA ENDOTOXIN AND INFLAMMATORY MEDIATORS IN SEPTIC PATIENTS. Transfus Apher Sci 2012. [DOI: 10.1016/s1473-0502(12)70016-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Shimizu T, Tani T, Obata T, Tabata T, Eguchi Y, Shoji H, Akabori H, Sonoda H, Endo Y. P-48 ALTERATION IN PLASMA ENDOTOXIN LEVEL DURING A LONGER DURATION OF DIRECT HEMOPERFUSION WITH A POLYMYXIN B-IMMOBILIZED FIBER COLUMN IN A PATIENT WITH SEPTIC SHOCK. Transfus Apher Sci 2012. [DOI: 10.1016/s1473-0502(12)70084-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kinoshita K, Yamaguchi Y, Nishide K, Kimoto K, Nonobe Y, Fujita A, Asano K, Tabata T, Mori H, Inoue H, Hata Y, Fukurotani K, Nishida N. A novel missense mutation causing a G487R substitution in the S2-S3 loop of human ether-à-go-go-related gene channel. J Cardiovasc Electrophysiol 2012; 23:1246-53. [PMID: 22764740 DOI: 10.1111/j.1540-8167.2012.02383.x] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
INTRODUCTION Mutations of human ether-à-go-go-related gene (hERG), which encodes a cardiac K(+) channel responsible for the acceleration of the repolarizing phase of an action potential and the prevention of premature action potential regeneration, often cause severe arrhythmic disorders. We found a novel missense mutation of hERG that results in a G487R substitution in the S2-S3 loop of the channel subunit [hERG(G487R)] from a family and determined whether this mutant gene could induce an abnormality in channel function. METHODS AND RESULTS We made whole-cell voltage-clamp recordings from HEK-293T cells transfected with wild-type hERG [hERG(WT)], hERG(G487R), or both. We measured hERG channel-mediated current as the "tail" of a depolarization-elicited current. The current density of the tail current and its voltage- and time-dependences were not different among all the cell groups. The time-courses of deactivation, inactivation, and recovery from inactivation and their voltage-dependences were not different among all the cell groups. Furthermore, we performed immunocytochemical analysis using an anti-hERG subunit antibody. The ratio of the immunoreactivity of the plasma membrane to that of the cytoplasm was not different between cells transfected with hERG(WT), hERG(G487R), or both. CONCLUSION hERG(G487R) can produce functional channels with normal gating kinetics and cell-surface expression efficiency with or without the aid of hERG(WT). Therefore, neither the heterozygous nor homozygous inheritance of hERG(G487R) is thought to cause severe cardiac disorders. hERG(G487R) would be a candidate for a rare variant or polymorphism of hERG with an amino acid substitution in the unusual region of the channel subunit.
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Affiliation(s)
- Koshi Kinoshita
- Department of Legal Medicine Second, Graduate School of Medical and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
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Coentrao L, Ribeiro C, Santos-Araujo C, Neto R, Pestana M, Kleophas W, Kleophas W, Karaboyas A, LI Y, Bommer J, Pisoni R, Robinson B, Port F, Celik G, Burcak Annagur B, Yilmaz M, Demir T, Kara F, Trigka K, Dousdampanis P, Vaitsis N, Aggelakou-Vaitsi S, Turkmen K, Guney I, Turgut F, Altintepe L, Tonbul HZ, Abdel-Rahman E, Sclauzero P, Galli G, Barbati G, Carraro M, Panzetta GO, Van Diepen M, Schroijen M, Dekkers O, Dekker F, Sikole A, Severova- Andreevska G, Trajceska L, Gelev S, Amitov V, Pavleska- Kuzmanovska S, Karaboyas A, Rayner H, LI Y, Vanholder R, Pisoni R, Robinson B, Port F, Hecking M, Jung B, Leung M, Huynh F, Chung T, Marchuk S, Kiaii M, Er L, Werb R, Chan-Yan C, Beaulieu M, Malindretos P, Makri P, Zagkotsis G, Koutroumbas G, Loukas G, Nikolaou E, Pavlou M, Gourgoulianni E, Paparizou M, Markou M, Syrgani E, Syrganis C, Raimann J, Usvyat LA, Bhalani V, Levin NW, Kotanko P, Huang X, Stenvinkel P, Qureshi AR, Riserus U, Cederholm T, Barany P, Heimburger O, Lindholm B, Carrero JJ, Chang JH, Sung JY, Jung JY, Lee HH, Chung W, Kim S, Han JS, Kim S, Chang JH, Jung JY, Chung W, Na KY, Raimann J, Usvyat LA, Kotanko P, Levin NW, Fragoso A, Pinho A, Malho A, Silva AP, Morgado E, Leao Neves P, Joki N, Tanaka Y, Iwasaki M, Kubo S, Hayashi T, Takahashi Y, Hirahata K, Imamura Y, Hase H, Castledine C, Gilg J, Rogers C, Ben-Shlomo Y, Caskey F, Na KY, Kim S, Chung W, Jung JY, Chang JH, Lee HH, Sandhu JS, Bajwa GS, Kansal S, Sandhu J, Jayanti A, Nikam M, Ebah L, Summers A, Mitra S, Agar J, Perkins A, Simmonds R, Tjipto A, Amet S, Launay-Vacher V, Laville M, Tricotel A, Frances C, Stengel B, Gauvrit JY, Grenier N, Reinhardt G, Clement O, Janus N, Rouillon L, Choukroun G, Deray G, Bernasconi A, Waisman R, Montoya AP, Liste AA, Hermes R, Muguerza G, Heguilen R, Iliescu EL, Martina V, Rizzo MA, Magenta P, Lubatti L, Rombola G, Gallieni M, Loirat C, Loirat C, Mellerio H, Labeguerie M, Andriss B, Savoye E, Lassale M, Jacquelinet C, Alberti C, Aggarwal Y, Baharani J, Tabrizian S, Ossareh S, Zebarjadi M, Azevedo P, Travassos F, Frade I, Almeida M, Queiros J, Silva F, Cabrita A, Rodrigues R, Couchoud C, Kitty J, Benedicte S, Fergus C, Cecile C, Couchoud C, Sahar B, Emmanuel V, Christian J, Rene E, Barahimi H, Mahdavi-Mazdeh M, Nafar M, Petruzzi M, De Benedittis M, Sciancalepore M, Gargano L, Natale P, Vecchio MC, Saglimbene V, Pellegrini F, Gentile G, Stroumza P, Frantzen L, Leal M, Torok M, Bednarek A, Dulawa J, Celia E, Gelfman R, Hegbrant J, Wollheim C, Palmer S, Johnson DW, Ford PJ, Craig JC, Strippoli GF, Ruospo M, El Hayek B, Hayek B, Baamonde E, Bosch E, Ramirez JI, Perez G, Ramirez A, Toledo A, Lago MM, Garcia-Canton C, Checa MD, Canaud B, Canaud B, Lantz B, Pisoni R, Granger-Vallee A, Lertdumrongluk P, Molinari N, Ethier J, Jadoul M, Gillespie B, Port F, Bond C, Wang S, Alfieri T, Braunhofer P, Newsome B, Wang M, Bieber B, Guidinger M, Bieber B, Wang M, Zuo L, Pisoni R, Yu X, Yang X, Qian J, Chen N, Albert J, Yan Y, Ramirez S, Bernasconi A, Waisman R, Beresan M, Lapidus A, Canteli M, Heguilen R, Tong A, Palmer S, Manns B, Craig J, Ruospo M, Gargano L, Strippoli G, Mortazavi M, Vahdatpour B, Shahidi S, Ghasempour A, Taheri D, Dolatkhah S, Emami Naieni A, Ghassami M, Khan M, Abdulnabi K, Pai P, Ruospo M, Petruzzi M, De Benedittis M, Sciancalepore M, Gargano L, Vecchio M, Saglimbene V, Natale P, Pellegrini F, Gentile G, Stroumza P, Frantzen L, Leal M, Torok M, Bednarek A, Dulawa J, Celia E, Gelfman R, Hegbrant J, Wollheim C, Palmer S, Johnson DW, Ford PJ, Craig JC, Strippoli GF, Muqueet MA, Muqueet MA, Hasan MJ, Kashem MA, Dutta PK, Liu FX, Noe L, Quock T, Neil N, Inglese G, Qian J, Bieber B, Guidinger M, Bieber B, Chen N, Yan Y, Pisoni R, Wang M, Zuo L, Yu X, Yang X, Wang M, Albert J, Ramirez S, Ossareh S, Motamed Najjar M, Bahmani B, Shafiabadi A, Helve J, Haapio M, Groop PH, Gronhagen-Riska C, Finne P, Helve J, Haapio M, Sund R, Groop PH, Gronhagen-Riska C, Finne P, Cai M, Baweja S, Clements A, Kent A, Reilly R, Taylor N, Holt S, Mcmahon L, Usvyat LA, Carter M, Van der Sande FM, Kooman J, Raimann J, Levin NW, Kotanko P, Usvyat LA, Malhotra R, Ouellet G, Penne EL, Raimann J, Thijssen S, Levin NW, Kotanko P, Etter M, Tashman A, Guinsburg A, Grassmann A, Barth C, Marelli C, Marcelli D, Van der Sande FM, Von Gersdorff G, Bayh I, Kooman J, Scatizzi L, Lam M, Schaller M, Thijssen S, Toffelmire T, Wang Y, Sheppard P, Usvyat LA, Levin NW, Kotanko P, Neri L, Andreucci VA, Rocca-Rey LA, Bertoli SV, Brancaccio D, Tjipto A, Simmonds R, Agar J, Huang X, Stenvinkel P, Qureshi AR, Riserus U, Cederholm T, Barany P, Heimburger O, Lindholm B, Carrero JJ, Vecchio M, Palmer S, De Berardis G, Craig J, Lucisano G, Johnson D, Pellegrini F, Nicolucci A, Sciancalepore M, Saglimbene V, Gargano L, Bonifati C, Ruospo M, Navaneethan SD, Montinaro V, Stroumza P, Zsom M, Torok M, Celia E, Gelfman R, Bednarek-Skublewska A, Dulawa J, Graziano G, Gentile G, Ferrari JN, Santoro A, Zucchelli A, Triolo G, Maffei S, Hegbrant J, Wollheim C, De Cosmo S, Manfreda VM, Strippoli GF, Janus N, Janus N, Launay-Vacher V, Juillard L, Rousset A, Butel F, Girardot-Seguin S, Deray G, Hannedouche T, Isnard M, Berland Y, Vanhille P, Ortiz JP, Janin G, Nicoud P, Touam M, Bruce E, Rouillon L, Laville M, Janus N, Juillard L, Rousset A, Butel F, Girardot-Seguin S, Deray G, Hannedouche T, Isnard M, Berland Y, Vanhille P, Ortiz JP, Janin G, Nicoud P, Touam M, Bruce E, Rouillon L, Laville M, Janus N, Launay-Vacher V, Juillard L, Rousset A, Butel F, Girardot-Seguin S, Deray G, Hannedouche T, Isnard M, Berland Y, Vanhille P, Ortiz JP, Janin G, Nicoud P, Touam M, Bruce E, Rouillon L, Laville M, Grace B, Clayton P, Cass A, Mcdonald S, Baharani J, Furumatsu Y, Kitamura T, Fujii N, Ogata S, Nakamoto H, Iseki K, Tsubakihara Y, Chien CC, Wang JJ, Hwang JC, Wang HY, Kan WC, Kuster N, Kuster N, Patrier L, Bargnoux AS, Morena M, Dupuy AM, Badiou S, Canaud B, Cristol JP, Desmet JM, Fernandes V, Collart F, Spinogatti N, Pochet JM, Dratwa M, Goffin E, Nortier J, Zilisteanu DS, Voiculescu M, Rusu E, Achim C, Bobeica R, Balanica S, Atasie T, Florence S, Anne-Marie S, Michel L, Cyrille C, Emmanuel V, Strakosha A, Strakosha A, Pasko N, Kodra S, Thereska N, Lowney A, Lowney E, Grant R, Murphy M, Casserly L, O' Brien T, Plant WD, Radic J, Radic J, Ljutic D, Kovacic V, Radic M, Dodig-Curkovic K, Sain M, Jelicic I, Fujii N, Hamano T, Nakano C, Yonemoto S, Okuno A, Katayama M, Isaka Y, Nordio M, Limido A, Postorino M, Nichelatti M, Khil M, Dudar I, Khil V, Shifris I, Momtaz M, Soliman AR, El Lawindi MI, Dzekova-Vidimliski P, Pavleska-Kuzmanovska S, Trajceska L, Nikolov I, Selim G, Gelev S, Amitov V, Sikole A, Shoji T, Kakiya R, Hayashi T, Tatsumi-Shimomura N, Tsujimoto Y, Tabata T, Shima H, Mori K, Fukumoto S, Tahara H, Koyama H, Emoto M, Ishimura E, Nishizawa Y, Inaba M. Epidemiology and outcome research in CKD 5D. Nephrol Dial Transplant 2012. [DOI: 10.1093/ndt/gfs227] [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: 11/13/2022] Open
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Umayahara K, Toita T, Kitagawa R, Hirashima Y, Tabata T, Aoki Y, Hamano T, Takizawa K, Mikami M, Group J. Phase II study of concurrent chemoradiotherapy with high-dose-rate intracavitary brachytherapy of low cumulative prescribed dose schedule for locally advanced cervical carcinoma in Japanese women (JGOG1066). Gynecol Oncol 2012. [DOI: 10.1016/j.ygyno.2011.12.068] [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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Kamikubo Y, Fujita Y, Shimomura T, Miyajima T, Fujino M, Tabata T, Fukurotani K, Kano M, Sakurai T. Adenosine A1 receptor interacts with mGluR1 and regulates cerebellar LTD. Neurosci Res 2011. [DOI: 10.1016/j.neures.2011.07.472] [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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Konda R, Osawa T, Nozawa T, Sugimura J, Fujioka T, Ishimoto Y, Ohki T, Uchida L, Kotera N, Tanaka M, Tanaka S, Sugimoto T, Mise N, Wu HY, Ko MJ, Yang JY, Hu FC, Chen SI, Jee SH, Chiu HC, Zumrutdal A, Hur E, Toz H, Ozkahya M, Usta M, Kayikcioglu LM, Sezis M, Asci G, Kahvecioglu S, Duman S, Ok E, Sakaguchi Y, Sonoda M, Kawabata H, Niihata K, Suzuki A, Shoji T, Tsubakihara Y, Emami Naini A, Moradi M, Mortazavi M, Shirani F, Gholamrezaei A, Demir S, San M, Koken T, Seok SJ, Gil HW, Yang JO, Lee EY, Hong SY, Stavroulopoulos A, Kossivakis A, Aresti V, Stamogiannos G, Kalliaropoulos A, Mentis A, Azak A, Huddam B, Kocak G, Altas AB, Sakaci M, Yalcin F, Ortabozkoyun L, Duranay M, Korukluoglu G, Eitner F, Scheithauer S, Mankartz J, Haefner H, Nowicki K, Floege J, Lemmen S, Hara S, Tanaka K, Suwabe T, Ubara Y, Takaichi K, Deleuze S, Bargnoux AS, Rivory JP, Rouanet C, Maurice F, Selcer I, Cristol JP, Dou Y, Thijssen S, Ouellet G, Kruse A, Rosales L, Kotanto P, Levin NW, Shahidi S, Sajjadieh S, Gholamrezaei A, Scholmann T, Straub M, Wagner D, Fliser D, Sester M, Sester U, Sikole A, Trajceska L, Selim G, Gelev S, Dzekova P, Amitov V, Arsov S, Strempska B, Bilinska M, Weyde W, Koszewicz M, Madziarska K, Golebiowski T, Klinger M, Ochi A, Ishimura E, Tsujimoto Y, Kakiya R, Tabata T, Mori K, Shoji T, Yasuda H, Nishizawa Y, Inaba M, Ezeonyeji A, Borg F, Harnett P, Dasgupta B, Raikou VD, Kyriaki D, Zeggos N, Skalioti C, Tzanatou H, Boletis JN, Viaene L, Meijers B, Bammens B, Vanrenterghem Y, Vanderschueren D, Evenepoel P, Ryu DR, An HR, Ryu JH, Yu M, Kim SJ, Kang DH, Choi KB, Miyamoto T, Rashid Qureshi A, Anderstam B, Yamamoto T, Alvestrand A, Stenvinkel P, Lindholm B, Axelsson J, Zitt E, Manamley N, Vervloet M, Georgianos P, Sarafidis P, Kanaki A, Divani M, Haidich AB, Sioulis A, Liakopoulos V, Papagianni A, Nikolaidis P, Lasaridis A, Morgado E, Pinho A, Guedes A, Guerreiro R, Mendes P, Bexiga I, Silva A, Marques J, Neves P. Pathophysiology and clinical studies in CKD 5D. Clin Kidney J 2011. [DOI: 10.1093/ndtplus/4.s2.57] [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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Iwamoto T, Yuta A, Tabata T, Sugimoto H, Hirai H, Kojima S, Gabazza EC, Sagawa N, Okuda M. Detection and prediction of carboplatin-related hypersensitivity reaction in patients with gynecologic cancer using basophil CD203c. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e19504] [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: 11/20/2022] Open
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Takekuma M, Hirashima Y, Ito K, Tsubamoto H, Tabata T, Arakawa A, Itani Y, Furukawa N, Murakoshi H, Takeuchi S. Phase II trial of paclitaxel and nedaplatin in patients with advanced/recurrent uterine cervical cancer: A Kansai Clinical Oncology Group study. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.5102] [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: 11/20/2022] Open
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Tsubamoto H, Inoue K, Kawaguchi R, Ito K, Takeuchi S, Shiozaki T, Itani Y, Arakawa A, Tabata T, Toyoda S. Phase II trial of weekly irinotecan and carboplatin for relapsed ovarian cancer: A Kansai Clinical Oncology Group study. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.5089] [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: 11/20/2022] Open
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Toiyama Y, Tanaka K, Yasuda H, Saigusa S, Fujikawa H, Mohri Y, Inoue Y, Miki C, Tabata T, Kusunoki M. Use of co-expression of HGF and c-Met to predict peritoneal dissemination established by autocrine HGF/c-Met signaling in gastric cancer. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.4_suppl.40] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
40 Background: Epithelial mesencymal transition (EMT) promotes facilitates migration and invasion of epithelial tumour cells. EMT is induced by growth factors implicated in theses process such as hepatocyte growth factor (HGF). Our aim of this study is whether HGF/c-Met pathway is associated with metastasis of gastric cancer (GC), especially in peritoneal dissemination (PD). Methods: HGF and c-Met expression and EMT related molecules were evaluated using real-time PCR and immunohistochemistry in GC tissues. The role of HGF/c-Met pathway for EMT and anoikis was determined and c-Met TKI (SU11274) was tested for their ability to block HGF-induced biological effects in vitro and vivo. Results: In HGF(-)c-Met(+) GC cells,recombinant HGF promoted EMT phenotype characterized by morphology, impaired E-cadherin and induction of Vimentin. HGF promoted cell growth, invasiveness, migration ability and inhibition of anoikis. SU11274 blocked HGF-induced EMT and the biological effects in vitro. In contrast of HGF(+)c-Met(+) GC cells, HGF exposure was not affected biological outcome of EMT and anoikis but SU11274 blocked biological effect as same as in HGF(-)c-Met(+) GC cells. In vivo, HGF(+)c-Met(+) GC cell line only established PD and SU11274 intraperitoneally caused an inhibition of PD growth. Clinically, HGF expression was significantly positive correlated with c-Met expression in GC specimens. Increased HGF and c-Met demonstrated a significantly associated with poor prognosis and can predict PD, respectively. Furthermore, HGF was one of the independent factors for predicting PD. Immunohistochemical analysis showed HGF and c-Met were predominantly co-expressed in cancer cell of both primary GC and PD. Conclusions: We have demonstrated that HGF/c-Met pathway as an inducer of EMT and anoikis inhibition in GC cell. Co-expression of HGF and c-Met implicates its potential to promote PD in GC. Blocking the autocrine HGF/c-Met pathway may be clinically useful for the treatment of PD in GC. No significant financial relationships to disclose.
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Affiliation(s)
- Y. Toiyama
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan; Mie University Graduate School of Medicine, Mie, Japan
| | - K. Tanaka
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan; Mie University Graduate School of Medicine, Mie, Japan
| | - H. Yasuda
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan; Mie University Graduate School of Medicine, Mie, Japan
| | - S. Saigusa
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan; Mie University Graduate School of Medicine, Mie, Japan
| | - H. Fujikawa
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan; Mie University Graduate School of Medicine, Mie, Japan
| | - Y. Mohri
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan; Mie University Graduate School of Medicine, Mie, Japan
| | - Y. Inoue
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan; Mie University Graduate School of Medicine, Mie, Japan
| | - C. Miki
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan; Mie University Graduate School of Medicine, Mie, Japan
| | - T. Tabata
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan; Mie University Graduate School of Medicine, Mie, Japan
| | - M. Kusunoki
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan; Mie University Graduate School of Medicine, Mie, Japan
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Hata Y, Mori H, Tanaka A, Fujita Y, Shimomura T, Tabata T, Kinoshita K, Nishida N. Identification and Characterization of a Novel Mutation M579Fs+75X in HERG. J Arrhythm 2011. [DOI: 10.4020/jhrs.27.pj3_045] [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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Iwata T, Tanaka K, Inoue Y, Toiyama Y, Hiro J, Saigusa S, Mohri Y, Miki C, Tabata T, Kusunoki M. Evaluation of macrophage inflammatory protein-3 alpha (MIP-3a) as a serum marker for prognosis of colorectal cancer. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.10585] [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: 11/20/2022] Open
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Ueno H, Koyama H, Tabata T, Nishizawa Y. Reply. Nephrol Dial Transplant 2010. [DOI: 10.1093/ndt/gfq039] [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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Fujita Y, Shimomura T, Hosoguchi M, Kano M, Fukurotani K, Tabata T. A new multiple-drug applicator with minimal drug cross-talk, leakage, and consumption. Neurosci Res 2010; 66:412-4. [PMID: 20060427 DOI: 10.1016/j.neures.2009.12.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2009] [Revised: 12/16/2009] [Accepted: 12/24/2009] [Indexed: 11/29/2022]
Abstract
The relative effects of multiple drugs give an important clue to dissect a neuronal mechanism and to seek for a candidate neurotherapeutical agent. Here we have devised a "flute" applicator which can deliver several drugs to a neural cell preparation. The applicator stands by, cleaning itself with bath perfusate and delivers drugs only during test applications. This minimizes drug cross-talk in and leakage from the applicator and drug consumption. Using the applicator, we successfully compared the relative effects of widely different doses of an agonist in single neurons. The flute applicator would be a useful tool for pharmacological analyses.
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Affiliation(s)
- Yosuke Fujita
- Laboratory for Neural Information Technology, Graduate School of Sciences and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
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Kamikubo Y, Fujita Y, Shimomura T, Tabata T, Fukurotani K, Sakurai T, Kano M. Signal-crosstalk between mGluR1 and A1R regulates LTD in cerebellar Purkinje cells. Neurosci Res 2010. [DOI: 10.1016/j.neures.2010.07.1501] [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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