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Sekimoto S, Inaba T. Characterization of Meloidogyne enterolobii intercepted from baobab ( Adansonia digitata L.) seedlings from Thailand during Japanese import plant quarantine inspection. Helminthologia 2023; 60:263-271. [PMID: 38152472 PMCID: PMC10750247 DOI: 10.2478/helm-2023-0027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 07/07/2023] [Indexed: 12/29/2023] Open
Abstract
In April 2019, baobab (Adansonia digitata L.) seedlings from Thailand, exhibiting galls on the roots, were intercepted during an import plant quarantine inspection at Chubu Centrair International Airport, Japan. Root-knot nematodes (RKNs) were extracted from the galled roots of baobab seedlings and identified by morphological, morphometrical and molecular methods as the guava root-knot nematode, Meloidogyne enterolobii Yang & Eisenback. The morphology and morphometrics of the intercepted population were similar to those of the original and subsequent descriptions of M. enterolobii. The sequences of D2-D3 of 28S rRNA, mtDNA intergenic COII-16S rRNA and COI genes obtained in this study matched well (99-100% similarity) with each of the gene sequences of M. enterolobii deposited in GenBank. Phylogenetic analysis of these genes revealed that the intercepted population clustered with M. enterolobii and clearly differed from other RKN species. To the best of our knowledge, this is the first report of M. enterolobii from baobab.
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Affiliation(s)
- S. Sekimoto
- Research Division, Yokohama Plant Protection Station, Ministry of Agriculture, Forestry and Fisheries (MAFF), Yokohama, Kanagawa231-0801, Japan
| | - T. Inaba
- Chubu Airport Sub-station, Nagoya Plant Protection Station, MAFF, Tokoname, Aichi479-0881, Japan
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Sekimoto S, Oyama G, Bito K, Tsuchiya M, Kikuchi S, Takimoto B, Ichihashi T, Bautista JMP, Nuermaimaiti M, Sasaki F, Nakamura R, Iwamuro H, Ito M, Umemura A, Hattori N. Three-dimensional gait analysis of the effect of directional steering on gait in patients with Parkinson's disease. Parkinsonism Relat Disord 2023; 114:105770. [PMID: 37499354 DOI: 10.1016/j.parkreldis.2023.105770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 07/17/2023] [Accepted: 07/17/2023] [Indexed: 07/29/2023]
Abstract
INTRODUCTION Deep Brain Stimulation (DBS) is an option to treat advanced Parkinson's Disease (PD), but can cause gait disturbance due to stimulation side efffects. This study aims to evaluate the objective effect of directional current steering by DBS on gait performance in PD, utilizing a three-dimensional gait analysis system. METHODS Eleven patients diagnosed with PD and were implanted with directional lead were recruited. The direction of the pyramidal tract (identified by the directional mode screening) was set as 0°. Patients performed the six-meter-walk test and the time up-and-go (TUG) test while an analysis system recorded gait parameters utilizing a three-dimensional motion capture camera. The gait parameters were measured for the baseline, the directional steering at eight angles (0°, 45°, 90°, 135°, 180°, 225°, 270°, and 315°), and the conventional ring mode with 1, 2, and 3 mA. Pulse width and frequency were fixed. Placebo stimulation (0 mA) was used for a control. RESULTS Eleven patients completed the study. No significant difference were observed between gait parameters during the directional, baseline, placebo, or ring modes during the six-meter-walk test (p > 0.05). During the TUG test, stride length was significantly different between 0° and other directions (p < 0.001), but no significant differences were observed for the other gait parameters. Stride width was non-significantly narrower in the direction of 0°. CONCLUSION Controlling stimulation using directional steering may improve gait in patients with PD, while avoiding pyramidal side effects.
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Affiliation(s)
- Satoko Sekimoto
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Genko Oyama
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan; Department of Neurodegenerative and Demented Disorders, Juntendo University School of Medicine, Tokyo, Japan; Department of Research and Therapeutics for Movement Disorders, Juntendo University School of Medicine, Tokyo, Japan.
| | - Kotatsu Bito
- Analytical Science Research Laboratories, Kao Corporation, Tokyo, Japan
| | - Masaru Tsuchiya
- Analytical Science Research Laboratories, Kao Corporation, Tokyo, Japan
| | - Sho Kikuchi
- Analytical Science Research Laboratories, Kao Corporation, Tokyo, Japan
| | - Baku Takimoto
- Analytical Science Research Laboratories, Kao Corporation, Tokyo, Japan
| | - Toshiki Ichihashi
- Analytical Science Research Laboratories, Kao Corporation, Tokyo, Japan
| | | | | | - Fuyuko Sasaki
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Ryota Nakamura
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Hirokazu Iwamuro
- Department of Research and Therapeutics for Movement Disorders, Juntendo University School of Medicine, Tokyo, Japan; Department of Neurosurgery, Juntendo University School of Medicine, Tokyo, Japan
| | - Masanobu Ito
- Department of Psychiatry, Juntendo University School of Medicine, Tokyo, Japan
| | - Atsushi Umemura
- Department of Research and Therapeutics for Movement Disorders, Juntendo University School of Medicine, Tokyo, Japan; Department of Neurosurgery, Juntendo University School of Medicine, Tokyo, Japan
| | - Nobutaka Hattori
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan; Department of Neurodegenerative and Demented Disorders, Juntendo University School of Medicine, Tokyo, Japan; Department of Research and Therapeutics for Movement Disorders, Juntendo University School of Medicine, Tokyo, Japan
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Sasaki F, Oyama G, Hirozane Y, Yamashita R, Sekimoto S, Hattori N. Impaired virtual space-tilting perception in Parkinson's disease with Pisa syndrome. Parkinsonism Relat Disord 2022; 104:30-34. [PMID: 36208613 DOI: 10.1016/j.parkreldis.2022.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 08/14/2022] [Accepted: 09/07/2022] [Indexed: 01/09/2023]
Abstract
INTRODUCTION The mechanism of Pisa syndrome in Parkinson's disease (PD) is unclear. We aimed to analyze the spatial perception of patients with PD with Pisa syndrome using virtual reality. METHODS In total, 16 patients with Pisa syndrome, 16 age-matched patients without Pisa syndrome, and 16 age-matched controls were included. They viewed the virtual room gradually tilting to different 8 directions randomized across trials. The 75% discrimination threshold angle and the mean tilting discrimination angle for each direction were evaluated. Participants' lateral trunk deviation was measured using Kinect. Neuropsychological status was evaluated, using the Mini-Mental Status Examination (MMSE), the Japanese version of the Montreal-Cognitive Assessment, Frontal Assessment Battery, and the color-word interference task of the Stroop test. Visuospatial abilities were assessed using Benton Judgement of Line Orientation, and vestibular function was evaluated using Subjective Visual Vertical (SVV). RESULTS The 75% discrimination threshold in the tilting discrimination angle was larger in all directions for those in the Pisa syndrome group compared to patients in the without Pisa syndrome group and those in the control group. There were significant differences between the three groups for Front-Right, Right, and Back. Patients with Pisa syndrome showed a significantly worse performance in these tests compared with controls and tended to have worse SVV performance compared with patients without Pisa syndrome. CONCLUSION The present findings support the hypothesis of visuo-spatial disability and/or attentional impairment in patients with Pisa syndrome.
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Affiliation(s)
- Fuyuko Sasaki
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Genko Oyama
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan; Department of Neurodegenerative and Demented Disorders, Juntendo University Graduate School of Medicine, Tokyo, Japan; Department of Home Medical Care System Based on Information and Communication Technology, Juntendo University Graduate School of Medicine, Tokyo, Japan; Department of Drug Development for Parkinson's Disease, Juntendo University Graduate School of Medicine, Tokyo, Japan; Department of PRO-Based Integrated Data Analysis in Neurological Disorders, Juntendo University Graduate School of Medicine, Tokyo, Japan; Department of Research and Therapeutics for Movement Disorders, Juntendo University Graduate School of Medicine, Tokyo, Japan.
| | | | - Ryo Yamashita
- Research, Takeda Pharmaceutical Company Limited, Japan
| | - Satoko Sekimoto
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Nobutaka Hattori
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan; Department of Neurodegenerative and Demented Disorders, Juntendo University Graduate School of Medicine, Tokyo, Japan; Department of Home Medical Care System Based on Information and Communication Technology, Juntendo University Graduate School of Medicine, Tokyo, Japan; Department of Drug Development for Parkinson's Disease, Juntendo University Graduate School of Medicine, Tokyo, Japan; Department of PRO-Based Integrated Data Analysis in Neurological Disorders, Juntendo University Graduate School of Medicine, Tokyo, Japan; Department of Research and Therapeutics for Movement Disorders, Juntendo University Graduate School of Medicine, Tokyo, Japan
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Wong JK, Deuschl G, Wolke R, Bergman H, Muthuraman M, Groppa S, Sheth SA, Bronte-Stewart HM, Wilkins KB, Petrucci MN, Lambert E, Kehnemouyi Y, Starr PA, Little S, Anso J, Gilron R, Poree L, Kalamangalam GP, Worrell GA, Miller KJ, Schiff ND, Butson CR, Henderson JM, Judy JW, Ramirez-Zamora A, Foote KD, Silburn PA, Li L, Oyama G, Kamo H, Sekimoto S, Hattori N, Giordano JJ, DiEuliis D, Shook JR, Doughtery DD, Widge AS, Mayberg HS, Cha J, Choi K, Heisig S, Obatusin M, Opri E, Kaufman SB, Shirvalkar P, Rozell CJ, Alagapan S, Raike RS, Bokil H, Green D, Okun MS. Proceedings of the Ninth Annual Deep Brain Stimulation Think Tank: Advances in Cutting Edge Technologies, Artificial Intelligence, Neuromodulation, Neuroethics, Pain, Interventional Psychiatry, Epilepsy, and Traumatic Brain Injury. Front Hum Neurosci 2022; 16:813387. [PMID: 35308605 PMCID: PMC8931265 DOI: 10.3389/fnhum.2022.813387] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 01/11/2022] [Indexed: 01/09/2023] Open
Abstract
DBS Think Tank IX was held on August 25-27, 2021 in Orlando FL with US based participants largely in person and overseas participants joining by video conferencing technology. The DBS Think Tank was founded in 2012 and provides an open platform where clinicians, engineers and researchers (from industry and academia) can freely discuss current and emerging deep brain stimulation (DBS) technologies as well as the logistical and ethical issues facing the field. The consensus among the DBS Think Tank IX speakers was that DBS expanded in its scope and has been applied to multiple brain disorders in an effort to modulate neural circuitry. After collectively sharing our experiences, it was estimated that globally more than 230,000 DBS devices have been implanted for neurological and neuropsychiatric disorders. As such, this year's meeting was focused on advances in the following areas: neuromodulation in Europe, Asia and Australia; cutting-edge technologies, neuroethics, interventional psychiatry, adaptive DBS, neuromodulation for pain, network neuromodulation for epilepsy and neuromodulation for traumatic brain injury.
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Affiliation(s)
- Joshua K. Wong
- Department of Neurology, Fixel Institute for Neurological Diseases, University of Florida, Gainesville, FL, United States
| | - Günther Deuschl
- Department of Neurology, Christian-Albrechts-University, Kiel, Germany
| | - Robin Wolke
- Department of Neurology, Christian-Albrechts-University, Kiel, Germany
| | - Hagai Bergman
- Department of Medical Neurobiology (Physiology), Institute of Medical Research Israel-Canada, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Muthuraman Muthuraman
- Biomedical Statistics and Multimodal Signal Processing Unit, Section of Movement Disorders and Neurostimulation, Focus Program Translational Neuroscience, Department of Neurology, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Sergiu Groppa
- Biomedical Statistics and Multimodal Signal Processing Unit, Section of Movement Disorders and Neurostimulation, Focus Program Translational Neuroscience, Department of Neurology, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Sameer A. Sheth
- Department of Neurological Surgery, Baylor College of Medicine, Houston, TX, United States
| | - Helen M. Bronte-Stewart
- The Human Motor Control and Neuromodulation Laboratory, Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford University, Stanford, CA, United States
| | - Kevin B. Wilkins
- The Human Motor Control and Neuromodulation Laboratory, Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford University, Stanford, CA, United States
| | - Matthew N. Petrucci
- The Human Motor Control and Neuromodulation Laboratory, Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford University, Stanford, CA, United States
| | - Emilia Lambert
- The Human Motor Control and Neuromodulation Laboratory, Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford University, Stanford, CA, United States
| | - Yasmine Kehnemouyi
- The Human Motor Control and Neuromodulation Laboratory, Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford University, Stanford, CA, United States
| | - Philip A. Starr
- Department of Neurological Surgery, Kavli Institute for Fundamental Neuroscience, University of California, San Francisco, San Francisco, CA, United States
| | - Simon Little
- Department of Neurological Surgery, Kavli Institute for Fundamental Neuroscience, University of California, San Francisco, San Francisco, CA, United States
| | - Juan Anso
- Department of Neurological Surgery, Kavli Institute for Fundamental Neuroscience, University of California, San Francisco, San Francisco, CA, United States
| | - Ro’ee Gilron
- Department of Neurological Surgery, Kavli Institute for Fundamental Neuroscience, University of California, San Francisco, San Francisco, CA, United States
| | - Lawrence Poree
- Department of Anesthesia, University of California, San Francisco, San Francisco, CA, United States
| | - Giridhar P. Kalamangalam
- Department of Neurology, Wilder Center for Epilepsy Research, University of Florida, Gainesville, FL, United States
| | | | - Kai J. Miller
- Department of Neurosurgery, Mayo Clinic, Rochester, NY, United States
| | - Nicholas D. Schiff
- Department of Neurology, Weill Cornell Brain and Spine Institute, Weill Cornell Medicine, New York, NY, United States
| | - Christopher R. Butson
- Department of Neurology, Fixel Institute for Neurological Diseases, University of Florida, Gainesville, FL, United States
| | - Jaimie M. Henderson
- Department of Neurosurgery, Stanford University, Stanford, CA, United States
| | - Jack W. Judy
- Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, United States
| | - Adolfo Ramirez-Zamora
- Department of Neurology, Fixel Institute for Neurological Diseases, University of Florida, Gainesville, FL, United States
| | - Kelly D. Foote
- Department of Neurosurgery, Fixel Institute for Neurological Diseases, University of Florida, Gainesville, FL, United States
| | - Peter A. Silburn
- Queensland Brain Institute, University of Queensland and Saint Andrews War Memorial Hospital, Brisbane, QLD, Australia
| | - Luming Li
- National Engineering Laboratory for Neuromodulation, School of Aerospace Engineering, Tsinghua University, Beijing, China
| | - Genko Oyama
- Department of Neurology, Faculty of Medicine, Juntendo University, Tokyo, Japan
| | - Hikaru Kamo
- Department of Neurology, Faculty of Medicine, Juntendo University, Tokyo, Japan
| | - Satoko Sekimoto
- Department of Neurology, Faculty of Medicine, Juntendo University, Tokyo, Japan
| | - Nobutaka Hattori
- Department of Neurology, Faculty of Medicine, Juntendo University, Tokyo, Japan
| | - James J. Giordano
- Neuroethics Studies Program, Department of Neurology, Georgetown University Medical Center, Washington, DC, United States
| | - Diane DiEuliis
- US Department of Defense Fort Lesley J. McNair, National Defense University, Washington, DC, United States
| | - John R. Shook
- Department of Philosophy and Science Education, University of Buffalo, Buffalo, NY, United States
| | - Darin D. Doughtery
- Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
| | - Alik S. Widge
- Department of Psychiatry, University of Minnesota, Minneapolis, MN, United States
| | - Helen S. Mayberg
- Department of Neurology and Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Jungho Cha
- Department of Neurology and Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Kisueng Choi
- Department of Neurology and Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Stephen Heisig
- Department of Neurology and Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Mosadolu Obatusin
- Department of Neurology and Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Enrico Opri
- Department of Neurology, Emory University, Atlanta, GA, United States
| | - Scott B. Kaufman
- Department of Psychology, Columbia University, New York, NY, United States
| | - Prasad Shirvalkar
- The Human Motor Control and Neuromodulation Laboratory, Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford University, Stanford, CA, United States
- Department of Anesthesiology (Pain Management) and Neurology, University of California, San Francisco, San Francisco, CA, United States
| | - Christopher J. Rozell
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, United States
| | - Sankaraleengam Alagapan
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, United States
| | - Robert S. Raike
- Restorative Therapies Group Implantables, Research and Core Technology, Medtronic Inc., Minneapolis, MN, United States
| | - Hemant Bokil
- Boston Scientific Neuromodulation Corporation, Valencia, CA, United States
| | - David Green
- NeuroPace, Inc., Mountain View, CA, United States
| | - Michael S. Okun
- Department of Neurology, Fixel Institute for Neurological Diseases, University of Florida, Gainesville, FL, United States
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Ogawa M, Oyama G, Sekimoto S, Hatano T, Hattori N. Current Status of Telemedicine for Parkinson's Disease in Japan: A Single-Center Cross-Sectional Questionnaire Survey. J Mov Disord 2021; 15:58-61. [PMID: 34937160 PMCID: PMC8820888 DOI: 10.14802/jmd.21096] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 10/08/2021] [Indexed: 11/24/2022] Open
Abstract
Objective Using telemedicine is a way to improve the accessibility of specialists for patients with Parkinson's disease (PD); however, it is not widely used in Japan. We investigated the efficacy of telemedicine in PD by using a single-center cross-sectional questionnaire survey. Methods We sent a questionnaire to patients who agreed to participate from among 52 patients with PD who had used telemedicine services at Juntendo University Hospital from October 2017 to November 2018. Caregivers were asked to respond to one question separately. Results A total of 38 patients responded to the questionnaire. Most patients were satisfied with the telemedicine consultation (7.8 ± 1.9), reporting that it was effective in reducing their travel burden. Twenty-one patients attended a telemedicine consultation with their caregivers, and their satisfaction was high (8.4 ± 1.8). Conclusion In a specific cohort in Japan, patients with PD and their caregivers were mostly satisfied with the telemedicine service.
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Affiliation(s)
- Mayuko Ogawa
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan.,Department of Neurodegenerative and Demented Disorders, Juntendo University School of Medicine, Tokyo, Japan
| | - Genko Oyama
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan.,Department of Neurodegenerative and Demented Disorders, Juntendo University School of Medicine, Tokyo, Japan.,Department of Home Medical Care System based on Information and Communication Technology, Juntendo University School of Medicine, Tokyo, Japan.,Department of Drug Development for Parkinson's Disease, Juntendo University School of Medicine, Tokyo, Japan
| | - Satoko Sekimoto
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Taku Hatano
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan.,Department of Neurodegenerative and Demented Disorders, Juntendo University School of Medicine, Tokyo, Japan.,Department of Drug Development for Parkinson's Disease, Juntendo University School of Medicine, Tokyo, Japan
| | - Nobutaka Hattori
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan.,Department of Neurodegenerative and Demented Disorders, Juntendo University School of Medicine, Tokyo, Japan.,Department of Home Medical Care System based on Information and Communication Technology, Juntendo University School of Medicine, Tokyo, Japan.,Department of Drug Development for Parkinson's Disease, Juntendo University School of Medicine, Tokyo, Japan
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Sekimoto S, Oyama G, Chiba S, Nuermaimaiti M, Sasaki F, Hattori N. Holomedicine: Proof of the Concept of Interactive Three‐Dimensional Telemedicine. Mov Disord 2020; 35:1719-1720. [DOI: 10.1002/mds.28249] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 07/27/2020] [Accepted: 07/30/2020] [Indexed: 11/08/2022] Open
Affiliation(s)
- Satoko Sekimoto
- Department of Neurology Juntendo University School of Medicine Bunkyo‐ku Japan
| | - Genko Oyama
- Department of Neurology Juntendo University School of Medicine Bunkyo‐ku Japan
- Department of Neurodegenerative and Dementia Disorders Juntendo University Faculty of Medicine Bunkyo‐ku Japan
| | - Shinji Chiba
- National Technology Office Microsoft Japan Co., Ltd. Tokyo Japan
| | | | - Fuyuko Sasaki
- Department of Neurology Juntendo University School of Medicine Bunkyo‐ku Japan
| | - Nobutaka Hattori
- Department of Neurology Juntendo University School of Medicine Bunkyo‐ku Japan
- Department of Neurodegenerative and Dementia Disorders Juntendo University Faculty of Medicine Bunkyo‐ku Japan
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7
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Lee JS, Kanai K, Suzuki M, Kim WS, Yoo HS, Fu Y, Kim DK, Jung BC, Choi M, Oh KW, Li Y, Nakatani M, Nakazato T, Sekimoto S, Funayama M, Yoshino H, Kubo SI, Nishioka K, Sakai R, Ueyama M, Mochizuki H, Lee HJ, Sardi SP, Halliday GM, Nagai Y, Lee PH, Hattori N, Lee SJ. Arylsulfatase A, a genetic modifier of Parkinson's disease, is an α-synuclein chaperone. Brain 2020; 142:2845-2859. [PMID: 31312839 DOI: 10.1093/brain/awz205] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 05/13/2019] [Accepted: 05/15/2019] [Indexed: 12/31/2022] Open
Abstract
Mutations in lysosomal genes increase the risk of neurodegenerative diseases, as is the case for Parkinson's disease. Here, we found that pathogenic and protective mutations in arylsulfatase A (ARSA), a gene responsible for metachromatic leukodystrophy, a lysosomal storage disorder, are linked to Parkinson's disease. Plasma ARSA protein levels were changed in Parkinson's disease patients. ARSA deficiency caused increases in α-synuclein aggregation and secretion, and increases in α-synuclein propagation in cells and nematodes. Despite being a lysosomal protein, ARSA directly interacts with α-synuclein in the cytosol. The interaction was more extensive with protective ARSA variant and less with pathogenic ARSA variant than wild-type. ARSA inhibited the in vitro fibrillation of α-synuclein in a dose-dependent manner. Ectopic expression of ARSA reversed the α-synuclein phenotypes in both cell and fly models of synucleinopathy, the effects correlating with the extent of the physical interaction between these molecules. Collectively, these results suggest that ARSA is a genetic modifier of Parkinson's disease pathogenesis, acting as a molecular chaperone for α-synuclein.
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Affiliation(s)
- Jun Sung Lee
- Department of Biomedical Sciences, Neuroscience Research Institute, and Department of Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Kazuaki Kanai
- Department of Neurology, Juntendo University, School of Medicine, Tokyo 113-8421, Japan
| | - Mari Suzuki
- Diabetic Neuropathy Project, Department of Sensory and Motor Systems, Tokyo Metropolitan Institute of Medical Science, Tokyo 156-8506, Japan.,Department of Neurotherapeutics, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
| | - Woojin S Kim
- Brain and Mind Centre, Sydney Medical School, The University of Sydney, Camperdown, NSW, Australia
| | - Han Soo Yoo
- Department of Neurology, Yonsei University College of Medicine, Seoul, Korea
| | - YuHong Fu
- Brain and Mind Centre, Sydney Medical School, The University of Sydney, Camperdown, NSW, Australia
| | - Dong-Kyu Kim
- Department of Biomedical Sciences, Neuroscience Research Institute, and Department of Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Byung Chul Jung
- Department of Biomedical Sciences, Neuroscience Research Institute, and Department of Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Minsun Choi
- Department of Biomedical Sciences, Neuroscience Research Institute, and Department of Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Kyu Won Oh
- Department of Biomedical Sciences, Neuroscience Research Institute, and Department of Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Yuanzhe Li
- Department of Neurology, Juntendo University, School of Medicine, Tokyo 113-8421, Japan
| | - Mitsuyoshi Nakatani
- Department of Neurology, Juntendo University, School of Medicine, Tokyo 113-8421, Japan
| | - Tomoko Nakazato
- Department of Neurology, Juntendo University, School of Medicine, Tokyo 113-8421, Japan
| | - Satoko Sekimoto
- Department of Neurology, Juntendo University, School of Medicine, Tokyo 113-8421, Japan
| | - Manabu Funayama
- Department of Neurology, Juntendo University, School of Medicine, Tokyo 113-8421, Japan
| | - Hiroyo Yoshino
- Department of Neurology, Juntendo University, School of Medicine, Tokyo 113-8421, Japan
| | - Shin-Ichiro Kubo
- Department of Neurology, Juntendo University, School of Medicine, Tokyo 113-8421, Japan
| | - Kenya Nishioka
- Department of Neurology, Juntendo University, School of Medicine, Tokyo 113-8421, Japan
| | - Ryusuke Sakai
- Department of Neurotherapeutics, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan.,Department of Neurology, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
| | - Morio Ueyama
- Department of Neurotherapeutics, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
| | - Hideki Mochizuki
- Department of Neurology, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
| | - He-Jin Lee
- Departmen of Anatomy, School of Medicine, Konkuk University, Seoul, Korea
| | | | - Glenda M Halliday
- Brain and Mind Centre, Sydney Medical School, The University of Sydney, Camperdown, NSW, Australia
| | - Yoshitaka Nagai
- Department of Neurotherapeutics, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan.,Department of Neurology, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
| | - Phil Hyu Lee
- Department of Neurology, Yonsei University College of Medicine, Seoul, Korea
| | - Nobutaka Hattori
- Department of Neurology, Juntendo University, School of Medicine, Tokyo 113-8421, Japan
| | - Seung-Jae Lee
- Department of Biomedical Sciences, Neuroscience Research Institute, and Department of Medicine, Seoul National University College of Medicine, Seoul, Korea
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Ito M, Sasaki F, Katsuta N, Sekimoto S, Jo T, Nakamura R, Nakajima A, Oyama G, Shimo Y, Iwamuro H, Umemura A, Ohnuma T, Hattori N. Young age and severity of motor function are risk factors for psychosis after subthalamic nucleus deep brain stimulation for Parkinson's disease. Psychiatry Clin Neurosci 2020; 74:328-329. [PMID: 32057166 DOI: 10.1111/pcn.12991] [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] [Received: 10/17/2019] [Revised: 12/08/2019] [Accepted: 02/10/2020] [Indexed: 11/27/2022]
Affiliation(s)
- Masanobu Ito
- Department of Psychiatry, Faculty of Medicine, Juntendo University, Tokyo, Japan
| | - Fuyuko Sasaki
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan
| | - Narimasa Katsuta
- Department of Psychiatry, Faculty of Medicine, Juntendo University, Tokyo, Japan
| | - Satoko Sekimoto
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan
| | - Takayuki Jo
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan
| | - Ryota Nakamura
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan
| | - Asuka Nakajima
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan
| | - Genko Oyama
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan
| | - Yasushi Shimo
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan.,Department of Research and Therapeutics for Movement Disorders, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Hirokazu Iwamuro
- Department of Research and Therapeutics for Movement Disorders, Juntendo University Graduate School of Medicine, Tokyo, Japan.,Department of Neurosurgery, Faculty of Medicine, Juntendo University, Tokyo, Japan
| | - Atsushi Umemura
- Department of Research and Therapeutics for Movement Disorders, Juntendo University Graduate School of Medicine, Tokyo, Japan.,Department of Neurosurgery, Faculty of Medicine, Juntendo University, Tokyo, Japan
| | - Tohru Ohnuma
- Department of Psychiatry, Faculty of Medicine, Juntendo University, Tokyo, Japan
| | - Nobutaka Hattori
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan
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9
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Bautista JMP, Oyama G, Nuermaimaiti M, Sekimoto S, Sasaki F, Hatano T, Nishioka K, Ito M, Umemura A, Ishibashi Y, Shimo Y, Hattori N. Rescue Levodopa/Carbidopa Intestinal Gel for Secondary Deep Brain Stimulation Failure. J Mov Disord 2020; 13:57-61. [PMID: 31986869 PMCID: PMC6987528 DOI: 10.14802/jmd.19051] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Accepted: 11/12/2019] [Indexed: 11/24/2022] Open
Abstract
Objective The long-term efficacy of deep brain stimulation (DBS) for motor fluctuations in advanced Parkinson’s disease (PD) has been well established; however, motor fluctuations may recur over time despite multiple adjustments of DBS settings and medications. Methods We conducted a retrospective chart review of three patients for whom levodopa-carbidopa intestinal gel (LCIG) was additionally administered as a rescue therapy for secondary DBS failure due to the recurrence of motor fluctuations. Results The three patients had advanced PD with a disease duration of 14–19 years, and had undergone DBS for motor fluctuations refractory to standard medical management. LCIG was administered to the patients because of symptom recurrence years after DBS and provided complementary effects in all patients. Conclusion The cases presented here show that rescue LCIG therapy may be a complementary treatment option for patients with post-DBS advanced PD who have a recurrence of troublesome motor complications.
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Affiliation(s)
- Juan Miguel Pilar Bautista
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan.,Department of Neurology, St. Luke's Medical Center, Quezon City, Philippines
| | - Genko Oyama
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | | | - Satoko Sekimoto
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Fuyuko Sasaki
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Taku Hatano
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Kenya Nishioka
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Masanobu Ito
- Department of Psychiatry, Juntendo University School of Medicine, Tokyo, Japan
| | - Atsushi Umemura
- Department of Neurosurgery, Juntendo University School of Medicine, Tokyo, Japan.,Department of Research and Therapeutics for Movement Disorders, Juntendo University School of Medicine, Tokyo, Japan
| | - Yuji Ishibashi
- Department of Gastroenterology and Minimally Invasive Surgery, Juntendo University School of Medicine, Tokyo, Japan
| | - Yasushi Shimo
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan.,Department of Research and Therapeutics for Movement Disorders, Juntendo University School of Medicine, Tokyo, Japan
| | - Nobutaka Hattori
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan.,Department of Research and Therapeutics for Movement Disorders, Juntendo University School of Medicine, Tokyo, Japan
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10
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Shimo Y, Hatano T, Sakurai M, Sekimoto S, Marisdina S, Hattori N. Freezing of gait in Parkinson's disease may share the mechanisms of dystonia. Neurol Sci 2019; 41:1285-1286. [PMID: 31776866 DOI: 10.1007/s10072-019-04155-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 11/14/2019] [Indexed: 10/25/2022]
Affiliation(s)
- Yasushi Shimo
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan. .,Department of Research and Therapeutics for Movement Disorders, School of Medicine, Juntendo University, Tokyo, Japan.
| | - Taku Hatano
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan
| | - Mayu Sakurai
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan
| | - Satoko Sekimoto
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan
| | - Selly Marisdina
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan.,Department of Neurology Mohammad Hoesin Hospital Faculty of Medicine, Sriwijaya University, Palembang, Indonesia
| | - Nobutaka Hattori
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan
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11
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Nakamura T, Sekimoto S, Oyama G, Shimo Y, Hattori N, Kajimoto H. Pilot feasibility study of a semi-automated three-dimensional scoring system for cervical dystonia. PLoS One 2019; 14:e0219758. [PMID: 31393884 PMCID: PMC6687132 DOI: 10.1371/journal.pone.0219758] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Accepted: 07/01/2019] [Indexed: 12/02/2022] Open
Abstract
The objective of this study is to test the feasibility of a semi-automated scoring system for the Toronto Western Spasmodic Torticollis Scale (TWSTRS) severity scale in patients with cervical dystonia. The TWSTRS requires training and experience. We previously developed a system to measure neck angle by analyzing three-dimensional position, obtained using Kinect, a marker-less three-dimensional depth sensor. The system can track patients’ faces and bodies, automatically analyze neck angles, and semi-automatically calculate the TWSTRS severity scale score. We compared the TWSTRS severity scale scores calculated by the system with the video-based scores calculated by a neurologist trained in movement disorders. A correlation coefficient analysis was then conducted. Absolute accuracy was measured using intra-class correlation (ICC) (3,1), with 95% limits of agreement. To analyze the subscales, Cohen's kappa coefficient (κ) was calculated. A p-value of < .05 was considered statistically significant. Thirty patients were enrolled. Their average age was 52.3±16.0 years, and the male to female ratio was 3:2. The average disease duration was 11.3±12.7 years. Total score measurements by the system were significantly correlated with those rated by the movement disorder-trained neurologist (r = .596, p < .05). There was a significant correlation (r = .655, p < .05) with regard to the automated part of the scale. An adequate ICC (3,1) of .562 was obtained for total severity score (p < .001, 95% confidence interval [CI]: .259–.765), while the equivalent score was .617 for the total automated part (p < .001, 95% CI .336–.798). Our three-dimensional motion capture system, which can measure head angles and semi-automatically calculate the TWSTRS severity scale score utilizing a single-depth camera, demonstrated adequate validity and reliability. This low-cost and portable system could be applied by general practitioners treating cervical dystonia to obtain objective measurements.
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Affiliation(s)
- Takuto Nakamura
- Department of Informatics, The University of Electro-communications, Tokyo, Japan
- Japan Society for the Promotion of Science, Tokyo, Japan
| | - Satoko Sekimoto
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Genko Oyama
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Yasushi Shimo
- Department of Informatics, The University of Electro-communications, Tokyo, Japan
| | - Nobutaka Hattori
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
- * E-mail:
| | - Hiroyuki Kajimoto
- Department of Informatics, The University of Electro-communications, Tokyo, Japan
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12
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Nakajima A, Shimo Y, Sekimoto S, Kamagata K, Jo T, Oyama G, Umemura A, Hattori N. Dopamine transporter imaging predicts motor responsiveness to levodopa challenge in patients with Parkinson's disease: A pilot study of DATSCAN for subthalamic deep brain stimulation. J Neurol Sci 2018; 385:134-139. [PMID: 29406893 DOI: 10.1016/j.jns.2017.12.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Revised: 12/18/2017] [Accepted: 12/25/2017] [Indexed: 01/06/2023]
Abstract
Imaging studies are necessary prior to subthalamic deep brain stimulation (STN-DBS). Dopamine transporter (DAT) imaging is a powerful tool for visualizing dopamine terminals in the striatum, but its usefulness in STN-DBS is unclear. Here, we retrospectively investigated the relationship between motor symptoms and the specific binding ratio (SBR) on DAT imaging in patients with Parkinson's disease (PD). We included 23 consecutive patients (9 female; 14 male) who were evaluated for DBS eligibility between October 2013 and October 2014 and subsequently received bilateral STN-DBS. Correlation and simple regression analyses were performed on SBR values and clinical parameters before and after surgery. SBR value was negatively correlated with Unified Parkinson's Disease Rating Scale (UPDRS) motor score in the "ON" state before surgery (rs=-0.637, p=0.001) and positively correlated with the reduction of the levodopa equivalent daily dose by surgery (r=0.422, p=0.045). A simple regression analysis revealed that SBR value was positively correlated with UPDRS motor score improvement after levodopa challenge before surgery (p=0.001, R2=0.423). DAT imaging may be useful in STN-DBS candidate selection and the identification of the therapeutic mechanism of STN-DBS in patients with advanced PD and motor symptom fluctuations.
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Affiliation(s)
- Asuka Nakajima
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan
| | - Yasushi Shimo
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan; Department of Research and Therapeutics for Movement Disorders, School of Medicine, Juntendo University, Tokyo, Japan.
| | - Satoko Sekimoto
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan
| | - Koji Kamagata
- Department of Radiology, School of Medicine, Juntendo University, Tokyo, Japan
| | - Takayuki Jo
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan
| | - Genko Oyama
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan
| | - Atsushi Umemura
- Department of Research and Therapeutics for Movement Disorders, School of Medicine, Juntendo University, Tokyo, Japan; Department of Neurosurgery, School of Medicine, Juntendo University, Tokyo, Japan
| | - Nobutaka Hattori
- Department of Neurology, School of Medicine, Juntendo University, Tokyo, Japan
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13
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Tokushige S, Matsuda S, Oyama G, Shimo Y, Umemura A, Sekimoto S, Sasaki T, Inomata-Terada S, Yugeta A, Hamada M, Ugawa Y, Hattori N, Tsuji S, Terao Y. How deep brain stimulation affects saccades in visual scanning in Parkinson's disease patients. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2936] [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: 11/25/2022]
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14
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Sekimoto S, Oyama G, Hatano T, Sasaki F, Nakamura R, Jo T, Shimo Y, Hattori N. The effectiveness of telemedicine system in Parkinson’s disease: A pilot study. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2064] [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: 11/27/2022]
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15
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Tokushige S, Terao Y, Matsuda S, Oyama G, Shimo Y, Umemura A, Sekimoto S, Sasaki T, Inomata-Terada S, Yugeta A, Hamada M, Ugawa Y, Hattori N, Tsuji S. The effect of deep brain stimulation on visual scanning of Parkinson’s disease patients. Brain Stimul 2017. [DOI: 10.1016/j.brs.2017.01.111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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16
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Tsukada R, Oyama G, Shimo Y, Sekimoto S, Jo T, Nakajima A, Umemura A, Arai H, Hattori N. Interleaving stimulation with a combination of bipolar and monopolar configurations for secondary failure of bilateral subthalamic stimulation in Parkinson's disease. ACTA ACUST UNITED AC 2016. [DOI: 10.1111/ncn3.12085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Rina Tsukada
- Department of Neurology Juntendo University School of MedicineTokyo Japan
| | - Genko Oyama
- Department of Neurology Juntendo University School of MedicineTokyo Japan
| | - Yasushi Shimo
- Department of Neurology Juntendo University School of MedicineTokyo Japan
- Department of Research and Therapeutics for Movement Disorders Juntendo University School of Medicine Tokyo Japan
| | - Satoko Sekimoto
- Department of Neurology Juntendo University School of MedicineTokyo Japan
| | - Takayuki Jo
- Department of Neurology Juntendo University School of MedicineTokyo Japan
| | - Asuka Nakajima
- Department of Neurology Juntendo University School of MedicineTokyo Japan
| | - Atsushi Umemura
- Department of Research and Therapeutics for Movement Disorders Juntendo University School of Medicine Tokyo Japan
- Department of Neurosurgery Juntendo University School of Medicine Tokyo Japan
| | - Hajime Arai
- Department of Neurosurgery Juntendo University School of Medicine Tokyo Japan
| | - Nobutaka Hattori
- Department of Neurology Juntendo University School of MedicineTokyo Japan
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17
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Yashima H, Sekimoto S, Ninomiya K, Kasamatsu Y, Shima T, Takahashi N, Shinohara A, Matsumura H, Satoh D, Iwamoto Y, Hagiwara M, Nishiizumi K, Caffee MW, Shibata S. Measurements of the neutron activation cross sections for Bi and Co at 386 MeV. Radiat Prot Dosimetry 2014; 161:139-143. [PMID: 24368868 DOI: 10.1093/rpd/nct334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Neutron activation cross sections for Bi and Co at 386 MeV were measured by activation method. A quasi-monoenergetic neutron beam was produced using the (7)Li(p,n) reaction. The energy spectrum of these neutrons has a high-energy peak (386 MeV) and a low-energy tail. Two neutron beams, 0° and 25° from the proton beam axis, were used for sample irradiation, enabling a correction for the contribution of the low-energy neutrons. The neutron-induced activation cross sections were estimated by subtracting the reaction rates of irradiated samples for 25° irradiation from those of 0° irradiation. The measured cross sections were compared with the findings of other studies, evaluated in relation to nuclear data files and the calculated data by Particle and Heavy Ion Transport code System code.
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Affiliation(s)
- H Yashima
- Research Reactor Institute, Kyoto University, Kumatori, Osaka 590-0494, Japan
| | - S Sekimoto
- Research Reactor Institute, Kyoto University, Kumatori, Osaka 590-0494, Japan
| | - K Ninomiya
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Y Kasamatsu
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - T Shima
- Research Center for Nuclear Physics, Osaka University, Suita, Osaka 567-0047, Japan
| | - N Takahashi
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - A Shinohara
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - H Matsumura
- High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan
| | - D Satoh
- Japan Atomic Energy Agency, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
| | - Y Iwamoto
- Japan Atomic Energy Agency, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
| | - M Hagiwara
- High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan
| | - K Nishiizumi
- Space Sciences Laboratory, University of California, Berkeley, CA 94720-7450, USA
| | - M W Caffee
- Department of Physics, Purdue University, West Lafayette, IN 47907, USA
| | - S Shibata
- Research Reactor Institute, Kyoto University, Kumatori, Osaka 590-0494, Japan
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18
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Ito S, Nakassuka K, Sekimoto S, Miyata K, Inomata M, Yoshida T, Tamai N, Saeki T, Sato K. Provoked coronary spasm at chronic stage predicts cardiovascular events in patients who underwent successful complete coronary revascularization with first-generation drug-eluting stents. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht310.p4814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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19
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Delfanazari K, Asai H, Tsujimoto M, Kashiwagi T, Kitamura T, Yamamoto T, Sawamura M, Ishida K, Watanabe C, Sekimoto S, Minami H, Tachiki M, Klemm RA, Hattori T, Kadowaki K. Tunable terahertz emission from the intrinsic Josephson junctions in acute isosceles triangular Bi₂Sr₂CaCu₂O₈+δ mesas. Opt Express 2013; 21:2171-2184. [PMID: 23389198 DOI: 10.1364/oe.21.002171] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In order to determine if the mesa geometry might affect the properties of the coherent terahertz (THz) radiation emitted from the intrinsic Josephson junctions in mesas constructed from single crystals of the high-temperature superconductor, Bi₂Sr₂CaCu₂O₈+δ, we studied triangular mesas. For equilateral triangular mesas, the observed emission was found to be limited to the single mesa TM(1,0) mode. However, tunable radiation over the range from 0.495 to 0.934 THz was found to arise from an acute isosceles triangular mesa. This 47% tunability is the widest yet observed from the outer current-voltage characteristic branch of such mesas of any geometry. Although the radiation at a few of the frequencies in the tunable range appear to have been enhanced by cavity resonances, most frequencies are far from such resonance frequencies, and can only be attributed to the ac-Josephson effect.
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Affiliation(s)
- K Delfanazari
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8573, Japan.
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Ebihara M, Sekimoto S, Shirai N, Hamajima Y, Yamamoto M, Kumagai K, Oura Y, Ireland TR, Kitajima F, Nagao K, Nakamura T, Naraoka H, Noguchi T, Okazaki R, Tsuchiyama A, Uesugi M, Yurimoto H, Zolensky ME, Abe M, Fujimura A, Mukai T, Yada Y. Neutron Activation Analysis of a Particle Returned from Asteroid Itokawa. Science 2011; 333:1119-21. [DOI: 10.1126/science.1207865] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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21
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Shiojiri M, Maeda T, Hirota Y, Isshiki T, Sekimoto S, Iwauchi K, Keda YI. High-resolution electron microscopy of BaxK2-xFexTi6-xO13 crystals in polar-glass state. J Microsc 2011. [DOI: 10.1111/j.1365-2818.1986.tb02759.x] [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: 11/30/2022]
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22
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Sekimoto S, Kobayashi T, Takamiya K, Ebihara M, Shibata S. Instrumental neutron activation analysis of spherule samples recovered from the Pacific ocean sea sediment and Antarctic ice sheet. J Radioanal Nucl Chem 2007. [DOI: 10.1007/s10967-007-0601-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Shiojiri M, Kaito C, Sekimoto S, Nakamura N. Polarity and inversion twins in ZnSe crystals observed by high-resolution electron microscopy. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/01418618208239574] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Morimura Y, Hoshi K, Tomita T, Hanyu T, Sekimoto S, Sato A. A twenty-year period in mass screening for uterine cervical cancer in Fukushima Prefecture. Fukushima J Med Sci 1998; 44:59-67. [PMID: 10091378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023] Open
Abstract
To explore the change in age distribution of patients with uterine cervical cancer and its precursors, we analyzed 2,168,923 women in a series of mass screening for uterine cervical cancer in Fukushima Prefecture. The first examination rate was not increased over a 20-year period. During the screening period, severe dysplasia was found in 693 women, carcinoma in situ in 672 women, microinvasive carcinoma in 517 women, and frank invasive carcinoma in 421 women. The numbers of patients with frank invasive carcinoma was decreased gradually in every age group, which might reflect the effectiveness of our mass screening project. Although the detection rates of severe dysplasia, carcinoma in situ and microinvasive carcinoma have not changed in patients groups over 40 years old, the detection rates were increased in patients under the age of 39. These results may reflect a recent tendency for cervical cancer to increase in young women. It is important, therefore, to increase the screening rate for young women to prevent the progression with advanced cervical cancer.
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Affiliation(s)
- Y Morimura
- Department of Obstetrics and Gynecology, Fukushima Medical University School of Medicine, Fukushima City, Japan
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Abstract
Several EEG studies have reported an early component of the visual evoked potential. However, it is controversial whether this component is cortical or subcortical. Our study has aimed to clarify this problem using MEG and EEG in nine normal volunteers. A total of 4000 stimuli were presented to the monocular visual hemifield through a light-proof stimulating goggle and the visual evoked magnetic field and visual evoked potential was measured above the occipital lobe. The early component was observed in three of the nine subjects. The latency ranged from 40 to 45 ms in MEG and from 39 to 47 ms in EEG. The result of dipole localization analysis showed that its origin was cortical, and specifically, the striate cortex.
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Affiliation(s)
- K Yoneda
- Department of Cognitive Neuroscience, Faculty of Medicine, University of Tokyo, Japan
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26
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Abstract
Changes in tubulin solubility during neurite formation were studied biochemically using rat dorsal root ganglion neurons in culture. When fractionated with Ca(2+)-containing buffer at low temperature, a considerable proportion of total cellular tubulin was recovered in the insoluble fraction. We designated this cold/Ca(2+)-insoluble tubulin (InsT) and distinguished it from cold/Ca(2+)-soluble tubulin (SoIT). From the relative amount of InsT, neurite formation was found to proceed through two distinct stages. The first 6 days after plating (stage 1) in which the proportion of InsT increased dramatically (from 5 to 60%) coincided with neurite outgrowth. In the following period (stage 2), a constant level of InsT was maintained, whereas neurite maturation took place. Pulse-labeling experiments further revealed that the two stages differed significantly in terms of tubulin metabolism. High rates of synthesis as well as conversion from SoIT to InsT were observed in stage 1, whereas stage 2 was characterized by a decrease in both of these rates and an increase in the rate of degradation. The results show for the first time the coordinated changes in tubulin metabolism that underlie the process of neurite formation.
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Affiliation(s)
- S Sekimoto
- Department of Molecular and Cellular Neurobiology, Gunma University School of Medicine, Japan
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27
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Abstract
Actin is one of the major cytoskeletal proteins carried in slow axonal transport. Since more than 50% of actin in the axon was recovered in the high-speed supernatant, we looked for G-actin-binding proteins in slow axonal transport. Two weeks after injection of L-[35S]methionine into the rat spinal cord (L3-L5), labeled proteins in the sciatic nerve were extracted and those with potential abilities to interact with G-actin were detected by two independent methods: (A) DNAase I affinity chromatography and (B) blot overlay with biotinylated actin. By method (A), a 68 kDa Ca(2+)-dependent binding protein and a 45 kDa Ca(2+)-independent binding protein were detected. The 68 kDa protein was also a major protein binding to actin in method (B). The 68 kDa protein was identified with the Ca(2+)-dependent phospholipid binding protein annexin VI by two-dimensional electrophoresis and Western blotting. As annexin VI is a component of slow axonal transport, it does not seem to be bound to membranous organelles in the axon. Our results suggest that annexin VI may play a role in the control of actin assembly and membrane-microfilament interaction.
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Affiliation(s)
- K Tanaka
- Department of Molecular and Cellular Neurobiology, Gunma University School of Medicine, Japan
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28
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Abstract
In order to determine the would healing process in the portio vaginalis uteri, 3[H]-thymidine incorporation and hydroxyproline concentration in the granulation tissue were measured histochemically after CO2-laser treatment. As a result, the squamous epithelium showed the thymidine uptake in extended regions in the first week and in basel cell hyperplastic regions in the second week. The uptake was seen in the reserve cell hyperplastic regions of the epithelium from the 2nd week. Hydroxyproline concentration peaks mostly appeared within one week after the laser treatment. After cryosurgery, the peaks mostly appeared after two weeks or more. These results indicated that, the stromas and then the squamous and columnar epithelial cells in turn were regenerated after CO2-laser treatment, and that the regeneration occurred earlier after laser treatment than after cryosurgery.
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Affiliation(s)
- K Hoshi
- Department of Obstetrics and Gynecology, Fukushima Medical College
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29
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Abstract
The major 68-kDa protein found selectively in the faster of the two subcomponents of slow axonal transport [group IV or slow component b (SCb)] in the rat sciatic nerve has been characterized. It was found to contain two distinct classes of proteins, S1 and S2, both of which have isoelectric points of 5.7, but differ in their solubility in the presence of calcium. The S1 protein, which contributes up to 70% of the 68-kDa component, was soluble in the presence or absence of calcium, whereas the S2 protein was bound to the cytoskeleton in a calcium-dependent manner. Further characterization of the two proteins by peptide mapping and immunological methods revealed that the S1 protein belonged to a family of proteins related to the 70-kDa heat shock protein, whereas the S2 protein was identical to 68-kDa calelectrin (annexin VI). Selective occurrence in SCb of these proteins with potential abilities to regulate protein-protein or protein-membrane interactions suggests that they may play important roles in the control of cytoskeletal organization in the axon, because SCb contains mainly cytoskeletal proteins in a more dynamic form compared with the slowest rate component, slow component a, which is enriched in the stably polymerized form of these proteins.
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Affiliation(s)
- S Sekimoto
- Department of Molecular and Cellular Neurobiology, Gunma University School of Medicine, Japan
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30
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Shiojiri M, Hirota Y, Isshiki T, Okashita K, Sekimoto S. High-resolution transmission electron microscopy of inorganic materials in cellular and topological random systems. J Electron Microsc Tech 1989; 12:281-95. [PMID: 2795234 DOI: 10.1002/jemt.1060120311] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The structure of amorphous Se films, in the topological random system, has been studied by the computer-simulation, electron diffraction (ED), and high-resolution transmission electron microscopy (HRTEM). As an example of HRTEM of the cellular random system, our recent investigation on Ba-ferrites is reviewed beforehand. In HRTEM images of spin-glass BaTi2-xSnxFe4O11 (x less than 0.6), magnetic clusters or clusters of FeO6-octahedra surrounded by TiO6-octahedra have been found. The structure of BaSn2Fe4O11 (x = 2) has been determined. The ordering of Sn (Ti) and Fe ions increases with increasing x, which interprets the change from the spin-glass state to nonspin-glass state at x = 0.6. It is shown that a cluster of polarized lattice ions is detectable in images of polar-glass BaxK2-xFexTi6-xO13 (x greater than or equal to 1.2). The structure models of amorphous Se films forming on a substrate have been constructed on a computer, and their radial distribution function (RDF) and HRTEM images have been calculated. Experimental RDF and HRTEM images have been obtained from vacuum-deposited amorphous Se films and are compared with the calculated ones. It is concluded that in the as-deposited films most of Se molecules may be composed of Se atoms as small as three and that by the electron-beam irradiation the molecules link to form spiral chains in amorphous state and then arrange to have the hexagonal crystal structure.
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Affiliation(s)
- M Shiojiri
- Department of Physics, Kyoto Institute of Technology, Japan
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31
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Sekimoto S. [Studies on interleukin 1 production and fibroblast stimulating activity of alveolar macrophages obtained from patients with connective tissue diseases accompanying interstitial pneumonia]. Arerugi 1987; 36:951-60. [PMID: 3502071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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32
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Sekimoto S, Saito Y, Ohara M, Nishimaki T, Kasukawa R. [The differential cell counts of bronchoalveolar lavage fluid and interleukin 1 production by alveolar macrophages in patients with collagen-vascular diseases complicated with interstitial pneumonia]. Arerugi 1986; 35:968-74. [PMID: 3492189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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33
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Sekimoto S. [Treatment of neoplasms of the uterine cervix by CO2 laser]. Gan No Rinsho 1985; 31:679-84. [PMID: 4032753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
CO2 evaporation was undertaken on 241 patients with cervical intraepithelial neoplasia. The results obtained six weeks after the treatment revealed disappearance of 89.6% of the lesions, and the therapeutic results obtained one year after reirradiation were favorable; 97.5% of the lesions had disappeared. However, not a few patients have some neoplasms of the uterine cervix to which this therapy is not applicable. Therefore, conization was started for treatment combined with diagnosis by means of CO2 laser. The therapeutic effect has been studied in 64 patients to date. Five patients with carcinoma of stage Ia and four patients with endoepithelial carcinoma who had undergone hysterectomy after conization were examined for the presence or absence of residual lesions. The lesions had disappeared completely. The remaining 64 patients who had not undergone hysterectomy are now under follow-up study, and a residual lesion was observed in only one patient, suggesting the possibility of treating a large number of CIN patients by evaporation combined with conization.
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34
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Inagaki M, Suzuki T, Nakano N, Sekimoto S, Ishikawa H, Kitano S. [Analysis of two types of seesaw nystagmus]. Nippon Ganka Gakkai Zasshi 1983; 87:498-506. [PMID: 6637671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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35
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Inagaki M, Kashima Y, Suzuki T, Nakano N, Sekimoto S, Ishikawa H, Kitano S. [Oculomotor nerve in the cavernous sinus]. Nippon Ganka Gakkai Zasshi 1983; 87:921-926. [PMID: 6673546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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36
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Kaito C, Nakamura N, Teranishi K, Sekimoto S, Shiojiri M. High resolution electron microscopic studies of the polymorphic transformation and crystal structures of low-temperature Ag2Se phases. ACTA ACUST UNITED AC 1982. [DOI: 10.1002/pssa.2210710113] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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37
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Inagaki M, Suzuki T, Sekimoto S, Ishikawa H, Ishikawa T. [A case of Wallenberg's syndrome with ocular lateropulsion and seesaw nystagmus]. Rinsho Shinkeigaku 1982; 22:295-9. [PMID: 7127972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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38
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Ishikawa H, Sekimoto S, Nakano N. [An application of the Arden grating test to normal population and amblyopic patients (author's transl)]. Nippon Ganka Gakkai Zasshi 1979; 83:1549-55. [PMID: 525584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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39
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Kika K, Sekimoto S. [Concept and practice of suction delivery]. Sanfujinka No Jissai 1967; 16:748-53. [PMID: 5630915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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40
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Okawa T, Sekimoto S. A case of bladder-paralysis, considered a side effect with an imidazole derivative, metronidazole. J Jpn Obstet Gynecol Soc 1964; 11:225-8. [PMID: 5886444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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