1
|
Fujino Y, Ueyama M, Ishiguro T, Ozawa D, Ito H, Sugiki T, Murata A, Ishiguro A, Gendron T, Mori K, Tokuda E, Taminato T, Konno T, Koyama A, Kawabe Y, Takeuchi T, Furukawa Y, Fujiwara T, Ikeda M, Mizuno T, Mochizuki H, Mizusawa H, Wada K, Ishikawa K, Onodera O, Nakatani K, Petrucelli L, Taguchi H, Nagai Y. FUS regulates RAN translation through modulating the G-quadruplex structure of GGGGCC repeat RNA in C9orf72-linked ALS/FTD. eLife 2023; 12:RP84338. [PMID: 37461319 PMCID: PMC10393046 DOI: 10.7554/elife.84338] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023] Open
Abstract
Abnormal expansions of GGGGCC repeat sequence in the noncoding region of the C9orf72 gene is the most common cause of familial amyotrophic lateral sclerosis and frontotemporal dementia (C9-ALS/FTD). The expanded repeat sequence is translated into dipeptide repeat proteins (DPRs) by noncanonical repeat-associated non-AUG (RAN) translation. Since DPRs play central roles in the pathogenesis of C9-ALS/FTD, we here investigate the regulatory mechanisms of RAN translation, focusing on the effects of RNA-binding proteins (RBPs) targeting GGGGCC repeat RNAs. Using C9-ALS/FTD model flies, we demonstrated that the ALS/FTD-linked RBP FUS suppresses RAN translation and neurodegeneration in an RNA-binding activity-dependent manner. Moreover, we found that FUS directly binds to and modulates the G-quadruplex structure of GGGGCC repeat RNA as an RNA chaperone, resulting in the suppression of RAN translation in vitro. These results reveal a previously unrecognized regulatory mechanism of RAN translation by G-quadruplex-targeting RBPs, providing therapeutic insights for C9-ALS/FTD and other repeat expansion diseases.
Collapse
Grants
- Scientific Research on Innovative Areas (Brain Protein Aging and Dementia Control) 17H05699 Ministry of Education, Culture, Sports, Science and Technology
- Scientific Research on Innovative Areas (Brain Protein Aging and Dementia Control) 17H05705 Ministry of Education, Culture, Sports, Science and Technology
- Transformative Research Areas (A) (Multifaceted Proteins) 20H05927 Ministry of Education, Culture, Sports, Science and Technology
- Strategic Research Program for Brain Sciences 11013026 Ministry of Education, Culture, Sports, Science and Technology
- Scientific Research (B) 21H02840 Japan Society for the Promotion of Science
- Scientific Research (B) 20H03602 Japan Society for the Promotion of Science
- Scientific Research (C) 15K09331 Japan Society for the Promotion of Science
- Scientific Research (C) 19K07823 Japan Society for the Promotion of Science
- Scientific Research (C) 17K07291 Japan Society for the Promotion of Science
- Young Scientists (A) 17H05091 Japan Society for the Promotion of Science
- Young Scientists (B) 25860733 Japan Society for the Promotion of Science
- Challenging Exploratory Research 24659438 Japan Society for the Promotion of Science
- Challenging Exploratory Research 18K19515 Japan Society for the Promotion of Science
- Health Labor Sciences Research Grant for Research on Development of New Drugs H24-Soyaku-Sogo-002 Ministry of Health, Labor and Welfare, Japan
- Strategic Research Program for Brain Sciences JP15dm0107026 Japan Agency for Medical Research and Development
- Strategic Research Program for Brain Sciences JP20dm0107061 Japan Agency for Medical Research and Development
- Practical Research Projects for Rare/Intractable Diseases JP16ek0109018 Japan Agency for Medical Research and Development
- Practical Research Projects for Rare/Intractable Diseases JP19ek0109222 Japan Agency for Medical Research and Development
- Practical Research Projects for Rare/Intractable Diseases JP20ek0109316 Japan Agency for Medical Research and Development
- Platform Project for Supporting Drug Discovery and Life Science Research JP19am0101072 Japan Agency for Medical Research and Development
- Intramural Research Grants for Neurological and Psychiatric Disorders 27-7 National Center of Neurology and Psychiatry
- Intramural Research Grants for Neurological and Psychiatric Disorders 27-9 National Center of Neurology and Psychiatry
- Intramural Research Grants for Neurological and Psychiatric Disorders 30-3 National Center of Neurology and Psychiatry
- Intramural Research Grants for Neurological and Psychiatric Disorders 30-9 National Center of Neurology and Psychiatry
- Intramural Research Grants for Neurological and Psychiatric Disorders 3-9 National Center of Neurology and Psychiatry
- IBC Grant H28 Japan Amyotrophic Lateral Sclerosis Association
- 2017 Takeda Science Foundation
- 2016 Takeda Science Foundation
- 2018 SENSHIN Medical Research Foundation
Collapse
Affiliation(s)
- Yuzo Fujino
- Department of Neurology, Kindai University Faculty of Medicine, Osaka-Sayama, Japan
- Department of Neurology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Morio Ueyama
- Department of Neurology, Kindai University Faculty of Medicine, Osaka-Sayama, Japan
- Department of Neurotherapeutics, Osaka University Graduate School of Medicine, Suita, Japan
- Department of Degenerative Neurological Diseases, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Taro Ishiguro
- Department of Degenerative Neurological Diseases, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
- Department of Neurology and Neurological Science, Tokyo Medical and Dental University, Tokyo, Japan
| | - Daisaku Ozawa
- Department of Neurology, Kindai University Faculty of Medicine, Osaka-Sayama, Japan
- Department of Neurotherapeutics, Osaka University Graduate School of Medicine, Suita, Japan
| | - Hayato Ito
- School of Life Science and Technology, Tokyo Institute of Technology, Yokohama, Japan
| | - Toshihiko Sugiki
- Laboratory of Molecular Biophysics, Institute for Protein Research, Osaka University, Osaka, Japan
| | - Asako Murata
- Department of Regulatory Bioorganic Chemistry, The Institute of Scientific and28 Industrial Research, Osaka University, Osaka, Japan
| | - Akira Ishiguro
- Research Center for Micro-nano Technology, Hosei University, Tokyo, Japan
| | - Tania Gendron
- Department of Neuroscience, Mayo Clinic, Jacksonville, United States
| | - Kohji Mori
- Department of Psychiatry, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Eiichi Tokuda
- Department of Chemistry, Keio University, Kanagawa, Japan
| | - Tomoya Taminato
- Department of Neurology, Kindai University Faculty of Medicine, Osaka-Sayama, Japan
- Department of Neurotherapeutics, Osaka University Graduate School of Medicine, Suita, Japan
| | - Takuya Konno
- Department of Neurology, Clinical Neuroscience Branch, Brain Research Institute, Niigata University, Niigata, Japan
| | - Akihide Koyama
- Department of Neurology, Clinical Neuroscience Branch, Brain Research Institute, Niigata University, Niigata, Japan
| | - Yuya Kawabe
- Department of Psychiatry, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Toshihide Takeuchi
- Department of Neurotherapeutics, Osaka University Graduate School of Medicine, Suita, Japan
- Life Science Research Institute, Kindai University, Osaka, Japan
| | | | - Toshimichi Fujiwara
- Laboratory of Molecular Biophysics, Institute for Protein Research, Osaka University, Osaka, Japan
| | - Manabu Ikeda
- Department of Psychiatry, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Toshiki Mizuno
- Department of Neurology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hideki Mochizuki
- Department of Neurology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hidehiro Mizusawa
- Department of Neurology and Neurological Science, Tokyo Medical and Dental University, Tokyo, Japan
| | - Keiji Wada
- Department of Degenerative Neurological Diseases, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Kinya Ishikawa
- Department of Neurology and Neurological Science, Tokyo Medical and Dental University, Tokyo, Japan
| | - Osamu Onodera
- Department of Neurology, Clinical Neuroscience Branch, Brain Research Institute, Niigata University, Niigata, Japan
| | - Kazuhiko Nakatani
- Department of Regulatory Bioorganic Chemistry, The Institute of Scientific and28 Industrial Research, Osaka University, Osaka, Japan
| | | | - Hideki Taguchi
- School of Life Science and Technology, Tokyo Institute of Technology, Yokohama, Japan
- Cell Biology Center, Institute of Innovative Research, Tokyo Institute of Technology, Kanagawa, Japan
| | - Yoshitaka Nagai
- Department of Neurology, Kindai University Faculty of Medicine, Osaka-Sayama, Japan
- Department of Neurotherapeutics, Osaka University Graduate School of Medicine, Suita, Japan
- Department of Degenerative Neurological Diseases, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
- Department of Neurology, Osaka University Graduate School of Medicine, Osaka, Japan
| |
Collapse
|
2
|
Nishida Y, Ishiguro T, Yokota T. Tap-Elicited Clonus of the Biceps and Triceps Brachii. JAMA Neurol 2021; 79:194. [PMID: 34807237 DOI: 10.1001/jamaneurol.2021.4273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Yoichiro Nishida
- Department of Neurology and Neurological Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Taro Ishiguro
- Department of Neurology and Neurological Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takanori Yokota
- Department of Neurology and Neurological Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| |
Collapse
|
3
|
Ishiguro T, Nagai Y, Ishikawa K. Insight Into Spinocerebellar Ataxia Type 31 (SCA31) From Drosophila Model. Front Neurosci 2021; 15:648133. [PMID: 34113230 PMCID: PMC8185138 DOI: 10.3389/fnins.2021.648133] [Citation(s) in RCA: 4] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 03/31/2021] [Indexed: 11/13/2022] Open
Abstract
Spinocerebellar ataxia type 31 (SCA31) is a progressive neurodegenerative disease characterized by degeneration of Purkinje cells in the cerebellum. Its genetic cause is a 2.5- to 3.8-kb-long complex pentanucleotide repeat insertion containing (TGGAA)n, (TAGAA)n, (TAAAA)n, and (TAAAATAGAA)n located in an intron shared by two different genes: brain expressed associated with NEDD4-1 (BEAN1) and thymidine kinase 2 (TK2). Among these repeat sequences, (TGGAA)n repeat was the only sequence segregating with SCA31, which strongly suggests its pathogenicity. In SCA31 patient brains, the mutant BEAN1 transcript containing expanded UGGAA repeats (UGGAAexp) was found to form abnormal RNA structures called RNA foci in cerebellar Purkinje cell nuclei. In addition, the deposition of pentapeptide repeat (PPR) proteins, poly(Trp-Asn-Gly-Met-Glu), translated from UGGAAexp RNA, was detected in the cytoplasm of Purkinje cells. To uncover the pathogenesis of UGGAAexp in SCA31, we generated Drosophila models of SCA31 expressing UGGAAexp RNA. The toxicity of UGGAAexp depended on its length and expression level, which was accompanied by the accumulation of RNA foci and translation of repeat-associated PPR proteins in Drosophila, consistent with the observation in SCA31 patient brains. We also revealed that TDP-43, FUS, and hnRNPA2B1, motor neuron disease–linked RNA-binding proteins bound to UGGAAexp RNA, act as RNA chaperones to regulate the formation of RNA foci and repeat-associated translation. Further research on the role of RNA-binding proteins as RNA chaperones may also provide a novel therapeutic strategy for other microsatellite repeat expansion diseases besides SCA31.
Collapse
Affiliation(s)
- Taro Ishiguro
- Department of Neurology and Neurological Science, Tokyo Medical and Dental University, Bunkyo City, Japan
| | - Yoshitaka Nagai
- Department of Neurotherapeutics, Osaka University Graduate School of Medicine, Suita, Japan
| | - Kinya Ishikawa
- Department of Neurology and Neurological Science, Tokyo Medical and Dental University, Bunkyo City, Japan.,Department of Personalized Genomic Medicine for Health, Graduate School, Tokyo Medical and Dental University, Bunkyo City, Japan
| |
Collapse
|
4
|
Namba K, Niimi Y, Ishiguro T, Higaki A, Toma N, Komiyama M. Cauda Equina and Filum Terminale Arteriovenous Fistulas: Anatomic and Radiographic Features. AJNR Am J Neuroradiol 2020; 41:2166-2170. [PMID: 33033040 DOI: 10.3174/ajnr.a6813] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Accepted: 06/01/2020] [Indexed: 11/07/2022]
Abstract
Intradural AVF below the conus medullaris may develop either on the filum terminale or the cauda equina (lumbosacral and coccygeal radicular nerves). Although not a few filum terminale AVFs are found in the literature, only 3 detailed cauda equina AVFs have been reported. Here, we analyze the angiographic and MR imaging findings of our cauda equina and filum terminale AVF cases, supplemented with literature research to characterize the radiologic features of the 2 entities. On angiography, filum terminale AVFs were invariably supplied by the extension of the anterior spinal artery accompanied by a closely paralleling filum terminale vein. Cauda equina AVFs were fed by either a radicular or a spinal artery or both arteries, often with a characteristic wavy radicular-perimedullary draining vein. On thin-section axial MR imaging, the filum terminale AVF draining vein joined the spinal cord at the conus medullaris apex, but that of the cauda equina AVF joined above the conus medullaris apex.
Collapse
Affiliation(s)
- K Namba
- From the Center for Endovascular Therapy (K.N., A.H.), Division of Neuroendovascular Surgery, Jichi Medical University, Tochigi, Japan
| | - Y Niimi
- Department of Neuroendovascular Therapy (Y.N.), St. Luke's International Hospital, Tokyo, Japan
| | - T Ishiguro
- Department of Neurointervention (T.I., M.K.), Osaka City General Hospital, Osaka, Japan
| | - A Higaki
- From the Center for Endovascular Therapy (K.N., A.H.), Division of Neuroendovascular Surgery, Jichi Medical University, Tochigi, Japan
| | - N Toma
- Department of Neurosurgery (N.T.), Mie University Graduate School of Medicine, Mie, Japan
| | - M Komiyama
- Department of Neurointervention (T.I., M.K.), Osaka City General Hospital, Osaka, Japan
| |
Collapse
|
5
|
Iwase R, Ishiguro T, Fujita K, Ishibashi S, Yokota T. Dupilumab for Atopic Dermatitis, a Possible Risk Factor of Juvenile Ischemic Stroke: A Case Report. J Stroke Cerebrovasc Dis 2020; 29:104763. [PMID: 32265139 DOI: 10.1016/j.jstrokecerebrovasdis.2020.104763] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 02/10/2020] [Accepted: 02/13/2020] [Indexed: 11/28/2022] Open
Abstract
Dupilumab, a dual inhibitor of IL-4 and IL-13 cytokine signaling, is indicated for the treatment of moderate-to-severe atopic dermatitis, which leads to the control of atopic dermatitis. The cytokines IL-4 and IL-13 are related to vascular inflammation, which is mediated by vascular endothelial cells. We report the case of a 20-year-old man with atopic dermatitis treated with dupilumab for half a year, who presented with sudden onset of dizziness, nausea, and slight cerebellar ataxia. Brain magnetic resonance imaging revealed acute infarction in the bicerebellar hemispheres. No risk factors known to be associated with ischemic stroke in young adults were detected. We suspected this ischemic stroke might be related to dupilumab. The administration of dupilumab was discontinued, and he had no recurrence subsequently. IL-4 and IL-13, anti-inflammatory cytokines secreted from T helper 2 cells, suppress proinflammatory cytokines. Therefore, dupilumab, a dual inhibitor of IL-4 and IL-13 cytokine signaling, leads to the promotion of coagulation and thrombosis. We speculate that the activation of proinflammatory cytokines in vascular endothelial cells by the inhibition of IL-4 and IL-13 signaling by dupilumab led to ischemic stroke even at a young age.
Collapse
Affiliation(s)
- Ryo Iwase
- Department of Neurology and Neurological Science, Tokyo Medical and Dental University 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Taro Ishiguro
- Department of Neurology and Neurological Science, Tokyo Medical and Dental University 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan.
| | - Kyohei Fujita
- Department of Neurology and Neurological Science, Tokyo Medical and Dental University 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Satoru Ishibashi
- Department of Neurology and Neurological Science, Tokyo Medical and Dental University 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Takanori Yokota
- Department of Neurology and Neurological Science, Tokyo Medical and Dental University 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| |
Collapse
|
6
|
Ishiguro T, Hatase T, Nishino K, Godo C, Nishikawa N, Umezu H, Motoyama T, Fukuchi T, Enomoto T. Cancer-associated retinopathy in a patient with synchronous fallopian tubal and uterine corpus cancers. EUR J GYNAECOL ONCOL 2019. [DOI: 10.12892/ejgo4778.2019] [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]
|
7
|
Tanaka K, Morita S, Ando M, Yokoyama T, Nakamura A, Yoshioka H, Ishiguro T, Miura S, Toyozawa R, Oguri T, Daga H, Ko R, Bessho A, Tachihara M, Iwamoto Y, Hirano K, Nakanishi Y, Nakagawa K, Yamamoto N, Okamoto I. MA13.06 Ph3 Study of Maintenance Therapy with S-1 vs BSC After Induction Therapy with Carboplatin + S-1 for Advanced Squamous Cell Lung Cancer (WJOG7512L). J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
8
|
Ishiguro T, Chihara M, Nishikawa N, Enomoto T. Superficial cervical scar endometriosis following cone biopsy. CLIN EXP OBSTET GYN 2019. [DOI: 10.12891/ceog4482.2019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
|
9
|
Kumagai Y, Hatano S, Sobajima J, Ishiguro T, Fukuchi M, Ishibashi KI, Mochiki E, Nakajima Y, Ishida H. Indocyanine green fluorescence angiography of the reconstructed gastric tube during esophagectomy: efficacy of the 90-second rule. Dis Esophagus 2018; 31:5036207. [PMID: 29897432 DOI: 10.1093/dote/doy052] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [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: 12/11/2022]
Abstract
By examining the reconstructed gastric tube during esophagectomy using indocyanine green fluorescence (ICG) angiography, we have established a '90-second rule' to confirm good blood perfusion at the anastomosis site. We examined the surgical outcome (rate of anastomotic leakage) of 70 consecutive patients who underwent esophagectomy with gastric tube reconstruction using ICG fluorescence angiography. All of the anastomoses were made in the area where less than 90 seconds was needed for enhancement using ICG fluorescence angiography (i.e. within the 90-second rule). In 18 cases for which the time until enhancement of the gastric tube tip exceeded 60 seconds, the anastomosis site was decided by reference to the ICG fluorescence angiogram, and the hypoperfused area was excised, and this significantly shortened the median time until enhancement of the gastric tube tip from 95.5 (60.0-204.0) seconds to 41.0 (9.0-77.0) seconds (P < 0.001). In three cases, the anastomosis was made at the site where more than 60 seconds was needed for ICG enhancement. In one case where ICG enhancement had taken 77 seconds, minor anastomotic leakage occurred. The overall rate of anastomotic leakage in this series was 1.4%. Blood flow in the reconstructed gastric tube is sufficient if the anastomosis is made in the area where ICG fluorescence angiography demonstrates enhancement within 60 seconds. Gastric tube necrosis can be avoided if the area showing an enhancement time exceeding 90 seconds is excised. The 90-second rule is a safe and effective method for deciding the site of anastomosis.
Collapse
Affiliation(s)
- Y Kumagai
- Department of Digestive Tract and General Surgery, Saitama Medical Center, Saitama Medical University, Saitama
| | - S Hatano
- Department of Digestive Tract and General Surgery, Saitama Medical Center, Saitama Medical University, Saitama
| | - J Sobajima
- Department of Digestive Tract and General Surgery, Saitama Medical Center, Saitama Medical University, Saitama
| | - T Ishiguro
- Department of Digestive Tract and General Surgery, Saitama Medical Center, Saitama Medical University, Saitama
| | - M Fukuchi
- Department of Digestive Tract and General Surgery, Saitama Medical Center, Saitama Medical University, Saitama
| | - K-I Ishibashi
- Department of Digestive Tract and General Surgery, Saitama Medical Center, Saitama Medical University, Saitama
| | - E Mochiki
- Department of Digestive Tract and General Surgery, Saitama Medical Center, Saitama Medical University, Saitama
| | - Ya Nakajima
- Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - H Ishida
- Department of Digestive Tract and General Surgery, Saitama Medical Center, Saitama Medical University, Saitama
| |
Collapse
|
10
|
Sawa T, Yoshida T, Ishiguro T, Horiba A, Futamura Y, Hosogi S, Nakahari T. P3.03-04 Is the Ciliary Function of the Lesion Bronchus Maintained in Patients with Lung Cancer? J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
11
|
Ishiguro T, Kasuga K, Saito K, Mezaki N, Miura T, Onodera O, Ikeuchi T. The effect of neuronal activity on β-amyloid precursor protein (APP) processing in cultured cells. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1868] [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]
|
12
|
Tokutake T, Kasuga K, Ishiguro T, Miura T, Mezaki N, Hirai K, Onodera O, Ikeuchi T. Characteristic clinical presentations and CSF biomarker features in patients with semantic dementia. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
13
|
Ueyama M, Ishiguro T, Konno T, Koyama A, Wada K, Ishikawa K, Onodera O, Nagai Y. Repeat associated non-atg translation and its regulation in C9orf72-associated amyotrophic lateral sclerosis/frontotemporal dementia model fly. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2021] [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: 11/24/2022]
|
14
|
Ishiguro T, Sato N, Ueyama M, Fujikake N, Sellier C, Tokuda E, Zamiri B, Gall-Duncan T, Mirceta M, Furukawa Y, Yokota T, Wada K, Taylor P, Pearson C, Charlet-Berguerand N, Mizusawa H, Nagai Y, Ishikawa K. Balance between RNA binding proetin TDP-43 and an RNA UGGAA repeat underlies pathogenesis of spinocerebellar ataxia type 31 (SCA31) and motor neuron disease fly models. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.218] [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: 11/24/2022]
|
15
|
Kanki R, Komiyama M, Ishiguro T, Terada A. The effect of embolization of pulmonary arteriovenous malformations on migraine among patients with hereditary hemorrhagic telangiectasia. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
16
|
Ura C, Okamura T, Yamazaki S, Ishiguro T, Miyazaki M, Ibe M, Kubota A, Kawamuro Y. RICE-FARMING CARE FOR PEOPLE WITH DEMENTIA; A NOVEL WAY OF SOCIAL PARTICIPATION FOR THE ELDERLY. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- C. Ura
- Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan,
| | - T. Okamura
- Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan,
- University of Tokyo, Tokyo, Japan,
| | | | | | | | - M. Ibe
- Kawamuro Memorial Hospital, Niigata, Japan
| | - A. Kubota
- Kawamuro Memorial Hospital, Niigata, Japan
| | | |
Collapse
|
17
|
Ishiguro T, Sato N, Ueyama M, Fujikake N, Sellier C, Kanegami A, Tokuda E, Zamiri B, Gall-Duncan T, Mirceta M, Furukawa Y, Yokota T, Wada K, Taylor JP, Pearson CE, Charlet-Berguerand N, Mizusawa H, Nagai Y, Ishikawa K. Regulatory Role of RNA Chaperone TDP-43 for RNA Misfolding and Repeat-Associated Translation in SCA31. Neuron 2017; 94:108-124.e7. [PMID: 28343865 PMCID: PMC5681996 DOI: 10.1016/j.neuron.2017.02.046] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Revised: 10/04/2016] [Accepted: 02/24/2017] [Indexed: 12/20/2022]
Abstract
Microsatellite expansion disorders are pathologically characterized by RNA foci formation and repeat-associated non-AUG (RAN) translation. However, their underlying pathomechanisms and regulation of RAN translation remain unknown. We report that expression of expanded UGGAA (UGGAAexp) repeats, responsible for spinocerebellar ataxia type 31 (SCA31) in Drosophila, causes neurodegeneration accompanied by accumulation of UGGAAexp RNA foci and translation of repeat-associated pentapeptide repeat (PPR) proteins, consistent with observations in SCA31 patient brains. We revealed that motor-neuron disease (MND)-linked RNA-binding proteins (RBPs), TDP-43, FUS, and hnRNPA2B1, bind to and induce structural alteration of UGGAAexp. These RBPs suppress UGGAAexp-mediated toxicity in Drosophila by functioning as RNA chaperones for proper UGGAAexp folding and regulation of PPR translation. Furthermore, nontoxic short UGGAA repeat RNA suppressed mutated RBP aggregation and toxicity in MND Drosophila models. Thus, functional crosstalk of the RNA/RBP network regulates their own quality and balance, suggesting convergence of pathomechanisms in microsatellite expansion disorders and RBP proteinopathies.
Collapse
Affiliation(s)
- Taro Ishiguro
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University (TMDU), Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8519, Japan; Center for Brain Integration Research (CBIR), Tokyo Medical and Dental University (TMDU), Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8519, Japan; Department of Degenerative Neurological Diseases, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8502, Japan
| | - Nozomu Sato
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University (TMDU), Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8519, Japan; Center for Brain Integration Research (CBIR), Tokyo Medical and Dental University (TMDU), Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Morio Ueyama
- Department of Degenerative Neurological Diseases, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8502, Japan; Department of Neurotherapeutics, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Nobuhiro Fujikake
- Department of Degenerative Neurological Diseases, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8502, Japan
| | - Chantal Sellier
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, University of Strasbourg, Illkirch 67400, France
| | - Akemi Kanegami
- Research Institute of Biomolecule Metrology, 807-133 Enokido, Tsukuba, Ibaraki 305-0853, Japan
| | - Eiichi Tokuda
- Department of Chemistry, Keio University, 3-14-1 Hiyoshi, Yokohama, Kanagawa 223-8522, Japan
| | - Bita Zamiri
- Department of Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, ON M5S 3M2, Canada; Department of Genetics, The Hospital for Sick Children, Peter Gilgan Centre for Research and Learning, 686 Bay Street, Toronto, ON M5G 0A4, Canada
| | - Terence Gall-Duncan
- Department of Genetics, The Hospital for Sick Children, Peter Gilgan Centre for Research and Learning, 686 Bay Street, Toronto, ON M5G 0A4, Canada; Program of Molecular Genetics, University of Toronto, Toronto, ON M5G 0A4, Canada
| | - Mila Mirceta
- Department of Genetics, The Hospital for Sick Children, Peter Gilgan Centre for Research and Learning, 686 Bay Street, Toronto, ON M5G 0A4, Canada; Program of Molecular Genetics, University of Toronto, Toronto, ON M5G 0A4, Canada
| | - Yoshiaki Furukawa
- Department of Chemistry, Keio University, 3-14-1 Hiyoshi, Yokohama, Kanagawa 223-8522, Japan
| | - Takanori Yokota
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University (TMDU), Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8519, Japan; Center for Brain Integration Research (CBIR), Tokyo Medical and Dental University (TMDU), Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Keiji Wada
- Department of Degenerative Neurological Diseases, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8502, Japan
| | - J Paul Taylor
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Christopher E Pearson
- Department of Genetics, The Hospital for Sick Children, Peter Gilgan Centre for Research and Learning, 686 Bay Street, Toronto, ON M5G 0A4, Canada; Program of Molecular Genetics, University of Toronto, Toronto, ON M5G 0A4, Canada
| | - Nicolas Charlet-Berguerand
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, University of Strasbourg, Illkirch 67400, France
| | - Hidehiro Mizusawa
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University (TMDU), Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8519, Japan; Center for Brain Integration Research (CBIR), Tokyo Medical and Dental University (TMDU), Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Yoshitaka Nagai
- Department of Degenerative Neurological Diseases, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8502, Japan; Department of Neurotherapeutics, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan.
| | - Kinya Ishikawa
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University (TMDU), Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8519, Japan; Center for Brain Integration Research (CBIR), Tokyo Medical and Dental University (TMDU), Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8519, Japan; Center for Personalized Medicine for Healthy Aging, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8519, Japan.
| |
Collapse
|
18
|
Nishikawa K, Fujitani K, Inagaki H, Akamaru Y, Tokunaga S, Takagi M, Tamura S, Sugimoto N, Shigematsu T, Yoshikawa T, Ishiguro T, Nakamura M, Yamane T, Yamada M, Imano M, Iijima S, Nashimoto A, Morita S, Miyashita Y, Tsuburaya A, Sakamoto J, Tsujinaka T. PD-035 Efficacy and safety of second-line irinotecan based chemotherapy in early relapse patients with gastric cancer after adjuvant chemotherapy: exploratory subgroup analysis of TRICS trial. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw200.35] [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: 11/14/2022] Open
|
19
|
Ishiguro T, Takayanagi T, Ikarashi H. Multiple metastatic liver abscesses and intravenous thrombosis due to pelvic actinomycosis. Eur J Obstet Gynecol Reprod Biol 2015; 198:166-167. [PMID: 26726122 DOI: 10.1016/j.ejogrb.2015.11.025] [Citation(s) in RCA: 4] [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] [Received: 10/09/2015] [Accepted: 11/19/2015] [Indexed: 11/17/2022]
Affiliation(s)
- T Ishiguro
- Department of Obstetrics and Gynaecology, Tsuruoka Municipal Shonai Hospital, Izumi-machi, Tsuruoka-city, Yamagata, Japan.
| | - T Takayanagi
- Department of Obstetrics and Gynaecology, Tsuruoka Municipal Shonai Hospital, Izumi-machi, Tsuruoka-city, Yamagata, Japan
| | - H Ikarashi
- Department of Obstetrics and Gynaecology, Tsuruoka Municipal Shonai Hospital, Izumi-machi, Tsuruoka-city, Yamagata, Japan
| |
Collapse
|
20
|
Nomura T, Ishiguro T, Ohira M, Ikeda Y, Watanabe M. The establishment of reference standard values for the lower extremity strength in diabetic patients: study design and an interim report. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.2001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
21
|
Kumagai Y, Kawada K, Higashi M, Ishiguro T, Sobajima J, Fukuchi M, Ishibashi K, Baba H, Mochiki E, Aida J, Kawano T, Ishida H, Takubo K. Endocytoscopic observation of various esophageal lesions at ×600: can nuclear abnormality be recognized? Dis Esophagus 2015; 28:269-75. [PMID: 24467464 DOI: 10.1111/dote.12183] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Endocytoscopy (ECS) is a novel endoscopic technique that allows detailed diagnostic examination of the gastrointestinal tract at the cellular level. We previously reported that use of ECS at ×380 magnification (GIF-Y0002) allowed a pathologist to diagnose esophageal squamous cell carcinoma (ESCC) with high sensitivity (94.9%) but considerably low specificity (46.7%) because this low magnification did not reveal information about nuclear abnormality. In the present study, we used the same magnifying endoscope to observe various esophageal lesions, but employed digital 1.6-fold magnification to achieve an effective magnification of ×600, and evaluated whether this improved the diagnostic accuracy in distinguishing neoplastic from non-neoplastic lesions.We examined the morphology of surface cells using vital staining with toluidine blue and compared the histological features of 40 cases, including 19 case of ESCC and 21 non-neoplastic esophageal lesions (18 cases of esophagitis, 1 case of glycogenic acanthosis, 1 case of leiomyoma, and 1 case of normal squamous epithelium). One endoscopist classified the lesions using the type classification, and we consulted one pathologist for judgment of the ECS images as 'neoplastic', 'borderline', or 'non-neoplastic'. At ×600 magnification, the pathologist confirmed that nuclear abnormality became evident, in addition to the information about nuclear density provided by observation at ×380. The overall sensitivity and specificity with which the endoscopist was able to predict neoplastic lesions using the type classification was 100% (19/19) and 90.5% (19/21), respectively, in comparison with values of 94.7% (18/19 cases) and 76.2% (16/21), respectively, for the pathologist using a magnification of ×600. The pathologist diagnosed two non-neoplastic lesions and one case of ESCC showing an apparent increase of nuclear density with weak nuclear abnormality as 'borderline'. Among the 21 non-cancerous lesions, two cases of esophagitis that were misdiagnosed by the endoscopist were also misinterpreted as 'neoplastic' by the pathologist. We have shown, by consultation with a pathologist, that an ECS magnification of ×600 (on a 19-inch monitor) is adequate for recognition of nuclear abnormality. We consider that it is feasible to diagnose esophageal neoplasms on the basis of ECS images, and that biopsy histology can be omitted if a combination of increased nuclear density and nuclear abnormality is observed.
Collapse
Affiliation(s)
- Y Kumagai
- Department of Digestive Tract and General Surgery, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Ishiguro T, van Rooijen W, Shimazu Y, Mochizuki H. Design of a passive residual heat removal system for the FUJI-233Um molten salt reactor system. ANN NUCL ENERGY 2014. [DOI: 10.1016/j.anucene.2013.08.037] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
23
|
Niimi Y, Takahashi M, Sugawara E, Umeda S, Obayashi M, Sato N, Ishiguro T, Higashi M, Eishi Y, Mizusawa H, Ishikawa K. Abnormal RNA structures (RNA foci) containing a penta-nucleotide repeat (UGGAA)nin the Purkinje cell nucleus is associated with spinocerebellar ataxia type 31 pathogenesis. Neuropathology 2013; 33:600-11. [DOI: 10.1111/neup.12032] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2012] [Revised: 02/12/2013] [Accepted: 02/13/2013] [Indexed: 11/27/2022]
Affiliation(s)
- Yusuke Niimi
- Department of Neurology and Neurological Science; Graduate School; Tokyo Medical and Dental University; Tokyo Japan
| | - Makoto Takahashi
- Department of Neurology and Neurological Science; Graduate School; Tokyo Medical and Dental University; Tokyo Japan
| | - Emiko Sugawara
- Department of Pathology; Graduate School; Tokyo Medical and Dental University; Tokyo Japan
| | - Shigeaki Umeda
- Department of Pathology; Graduate School; Tokyo Medical and Dental University; Tokyo Japan
| | - Masato Obayashi
- Department of Neurology and Neurological Science; Graduate School; Tokyo Medical and Dental University; Tokyo Japan
| | - Nozomu Sato
- Department of Neurology and Neurological Science; Graduate School; Tokyo Medical and Dental University; Tokyo Japan
| | - Taro Ishiguro
- Department of Neurology and Neurological Science; Graduate School; Tokyo Medical and Dental University; Tokyo Japan
| | - Miwa Higashi
- Department of Neurology and Neurological Science; Graduate School; Tokyo Medical and Dental University; Tokyo Japan
| | - Yoshinobu Eishi
- Department of Pathology; Graduate School; Tokyo Medical and Dental University; Tokyo Japan
| | - Hidehiro Mizusawa
- Department of Neurology and Neurological Science; Graduate School; Tokyo Medical and Dental University; Tokyo Japan
| | - Kinya Ishikawa
- Department of Neurology and Neurological Science; Graduate School; Tokyo Medical and Dental University; Tokyo Japan
| |
Collapse
|
24
|
Takahashi M, Obayashi M, Ishiguro T, Sato N, Niimi Y, Ozaki K, Mogushi K, Mahmut Y, Tanaka H, Tsuruta F, Dolmetsch R, Yamada M, Takahashi H, Kato T, Mori O, Eishi Y, Mizusawa H, Ishikawa K. Cytoplasmic location of α1A voltage-gated calcium channel C-terminal fragment (Cav2.1-CTF) aggregate is sufficient to cause cell death. PLoS One 2013; 8:e50121. [PMID: 23505410 PMCID: PMC3591409 DOI: 10.1371/journal.pone.0050121] [Citation(s) in RCA: 9] [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: 12/16/2011] [Accepted: 10/17/2012] [Indexed: 01/20/2023] Open
Abstract
The human α1A voltage-dependent calcium channel (Cav2.1) is a pore-forming essential subunit embedded in the plasma membrane. Its cytoplasmic carboxyl(C)-tail contains a small poly-glutamine (Q) tract, whose length is normally 4∼19 Q, but when expanded up to 20∼33Q, the tract causes an autosomal-dominant neurodegenerative disorder, spinocerebellar ataxia type 6 (SCA6). A recent study has shown that a 75-kDa C-terminal fragment (CTF) containing the polyQ tract remains soluble in normal brains, but becomes insoluble mainly in the cytoplasm with additional localization to the nuclei of human SCA6 Purkinje cells. However, the mechanism by which the CTF aggregation leads to neurodegeneration is completely elusive, particularly whether the CTF exerts more toxicity in the nucleus or in the cytoplasm. We tagged recombinant (r)CTF with either nuclear-localization or nuclear-export signal, created doxycyclin-inducible rat pheochromocytoma (PC12) cell lines, and found that the CTF is more toxic in the cytoplasm than in the nucleus, the observations being more obvious with Q28 (disease range) than with Q13 (normal-length). Surprisingly, the CTF aggregates co-localized both with cAMP response element-binding protein (CREB) and phosphorylated-CREB (p-CREB) in the cytoplasm, and Western blot analysis showed that the quantity of CREB and p-CREB were both decreased in the nucleus when the rCTF formed aggregates in the cytoplasm. In human brains, polyQ aggregates also co-localized with CREB in the cytoplasm of SCA6 Purkinje cells, but not in other conditions. Collectively, the cytoplasmic Cav2.1-CTF aggregates are sufficient to cause cell death, and one of the pathogenic mechanisms may be abnormal CREB trafficking in the cytoplasm and reduced CREB and p-CREB levels in the nuclei.
Collapse
Affiliation(s)
- Makoto Takahashi
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, Yushima, Bunkyo-ku, Tokyo, Japan
| | - Masato Obayashi
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, Yushima, Bunkyo-ku, Tokyo, Japan
| | - Taro Ishiguro
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, Yushima, Bunkyo-ku, Tokyo, Japan
| | - Nozomu Sato
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, Yushima, Bunkyo-ku, Tokyo, Japan
| | - Yusuke Niimi
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, Yushima, Bunkyo-ku, Tokyo, Japan
| | - Kokoro Ozaki
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, Yushima, Bunkyo-ku, Tokyo, Japan
| | - Kaoru Mogushi
- Information Center for Medical Sciences, Tokyo Medical and Dental University, Yushima, Bunkyo-ku, Tokyo, Japan
| | - Yasen Mahmut
- Information Center for Medical Sciences, Tokyo Medical and Dental University, Yushima, Bunkyo-ku, Tokyo, Japan
| | - Hiroshi Tanaka
- Information Center for Medical Sciences, Tokyo Medical and Dental University, Yushima, Bunkyo-ku, Tokyo, Japan
| | - Fuminori Tsuruta
- Department of Neurobiology, Stanford University School of Medicine, Fairchild Research Building, Palo Alto, California, United States of America
| | - Ricardo Dolmetsch
- Department of Neurobiology, Stanford University School of Medicine, Fairchild Research Building, Palo Alto, California, United States of America
| | - Mitsunori Yamada
- Department of Pathology, Pathological Neuroscience Branch, Brain Research Institute, Niigata University, Asahi-machi-dori, Niigata, Japan
- Department of Clinical Research, National Hospital Organization, Saigata National Hospital, Saigata, Ohgata-ku, Johetsu-City, Niigata, Japan
| | - Hitoshi Takahashi
- Department of Pathology, Pathological Neuroscience Branch, Brain Research Institute, Niigata University, Asahi-machi-dori, Niigata, Japan
| | - Takeo Kato
- Department of Neurology, Hematology, Metabolism, Endocrinology and Diabetology, Yamagata University Faculty of Medicine, Iida-Nishi, Yamagata, Japan
| | - Osamu Mori
- Department of Internal Medicine and Neurology, Hatsuishi Hospital, Nishihara, Kashiwa, Chiba, Japan
| | - Yoshinobu Eishi
- Department of Pathology, Graduate School, Tokyo Medical and Dental University, Yushima, Bunkyo-ku, Tokyo, Japan
| | - Hidehiro Mizusawa
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, Yushima, Bunkyo-ku, Tokyo, Japan
| | - Kinya Ishikawa
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, Yushima, Bunkyo-ku, Tokyo, Japan
- * E-mail:
| |
Collapse
|
25
|
Toru S, Murata T, Ohara M, Ishiguro T, Kobayashi T. Paradoxical cerebral embolism with patent foramen ovale and deep venous thrombosis caused by a massive myoma uteri. Clin Neurol Neurosurg 2012; 115:760-1. [PMID: 22898091 DOI: 10.1016/j.clineuro.2012.06.042] [Citation(s) in RCA: 7] [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: 09/29/2011] [Revised: 06/27/2012] [Accepted: 06/30/2012] [Indexed: 11/16/2022]
Affiliation(s)
- Shuta Toru
- Department of Neurology, Nakano General Hospital, 4-59-16 Chuo, Nakano-ku, Tokyo 164-8607, Japan.
| | | | | | | | | |
Collapse
|
26
|
|
27
|
Onuma T, Kagamitani Y, Hazu K, Ishiguro T, Fukuda T, Chichibu SF. Femtosecond-laser-driven photoelectron-gun for time-resolved cathodoluminescence measurement of GaN. Rev Sci Instrum 2012; 83:043905. [PMID: 22559547 DOI: 10.1063/1.3701368] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A rear-excitation femtosecond-laser-driven photoelectron gun (PE-gun) is developed for measuring time-resolved cathodoluminescence (TRCL) spectrum of wide bandgap materials and structures such as semiconductors and phosphors. The maximum quantum efficiency of a 20-nm-thick Au photocathode excited using a frequency-tripled Al(2)O(3):Ti laser under a rear-excitation configuration is 3.6×10(-6), which is a reasonable value for a PE-gun. When the distance between the front edge of the PE-gun and the observation point is 10 mm, the narrowest electron-beam (e-beam) diameter is 19 μm, which corresponds to one tenth of the laser-beam diameter and is comparable to the initial e-beam diameter of a typical W hair-pin filament of thermionic electron-gun. From the results of TRCL measurements on the freestanding GaN grown by the ammonothermal method and a GaN homoepitaxial film grown by metalorganic vapor phase epitaxy, overall response time for the present TRCL system is estimated to be 8 ps. The value is the same as that of time-resolved photoluminescence measurement using the same excitation laser pulses, meaning that the time-resolution is simply limited by the streak-camera, not by the PE-gun performance. The result of numerical simulation on the temporal e-beam broadening caused by the space-charge-effect suggests that the present PE-gun can be used as a pulsed e-beam source for spatio-time-resolved cathodoluminescence, when equipped in a scanning electron microscope.
Collapse
Affiliation(s)
- T Onuma
- Center for Advanced Nitride Technology (CANTech), Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba, Sendai 980-8577, Japan
| | | | | | | | | | | |
Collapse
|
28
|
Takahashi M, Ishikawa K, Sato N, Obayashi M, Niimi Y, Ishiguro T, Yamada M, Toyoshima Y, Takahashi H, Kato T, Takao M, Murayama S, Mori O, Eishi Y, Mizusawa H. Reduced brain-derived neurotrophic factor (BDNF) mRNA expression and presence of BDNF-immunoreactive granules in the spinocerebellar ataxia type 6 (SCA6) cerebellum. Neuropathology 2012; 32:595-603. [DOI: 10.1111/j.1440-1789.2012.01302.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
29
|
Matsushita H, Ishiguro T, Kurabayashi T, Shibuya M. Acute generalized exanthematous pustulosis during the puerperal period: a case report. CLIN EXP OBSTET GYN 2012; 39:414-416. [PMID: 23157063] [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: 06/01/2023]
Abstract
BACKGROUND Acute generalized exanthematous pustulosis (AGEP) is an uncommon adverse cutaneous reaction, most commonly associated with drugs. CASE A 38-year-old primigravida whose labor had been induced developed erythema over her chest and abdomen. She was transferred to our department after a failed vacuum extraction, and delivered a mature infant by forceps. On day three postpartum she developed a 40.4 degrees C fever. Although ceftriaxone was administered, her fever persisted (>38 degreesC). On day six of the puerperium, diffuse non-follicular pustules appeared over her neck and trunk, and AGEP was suspected. Two days after ceftriaxone was withdrawn, the eruptions started to resolve without any medical intervention. CONCLUSION Once the diagnosis of AGEP has been made, the antibiotics being administered must be discontinued. If continued treatment is required, pharmacologically distinct antibiotics must be used instead to aid the rapid self-limitation of the disease.
Collapse
Affiliation(s)
- H Matsushita
- Department of Obstetrics & Gynecology, Niigata City General Hospital, Shumoku, Chuo-ku, Niigata, Japan.
| | | | | | | |
Collapse
|
30
|
Okuno K, Ohara M, Ishiguro T, Sato T, Yamazaki T, Toru S, Mae S, Kobayashi T, Ohno R. [Case report; Improvement of cognitive function and abolisnment of epileptic disharges after the resection of lung cancer (large cell neuroendocrine carcimona)]. Nihon Naika Gakkai Zasshi 2011; 100:3041-3043. [PMID: 22175149 DOI: 10.2169/naika.100.3041] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Affiliation(s)
- Keisuke Okuno
- Department of Medicine, Nakano General Hospital, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Ishida H, Ishiguro T, Ohsawa T, Okada N, Yokoyama M, Kumamoto K, Ishibashi K, Haga N. Curative colectomy via minilaparotomy approach without utilizing specific instruments. Tech Coloproctol 2010; 14:153-9. [PMID: 20428914 DOI: 10.1007/s10151-010-0583-2] [Citation(s) in RCA: 6] [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] [Received: 03/08/2010] [Accepted: 04/05/2010] [Indexed: 10/19/2022]
Abstract
BACKGROUND This study evaluated the need for specific instruments when performing a curative resection of colon cancer via a minilaparotomy approach, which has been reported to be a minimally invasive alternative to a laparoscopic approach. METHODS The feasibility, safety, and early oncological outcome were compared among 73 patients (first group), in whom a curative resection of colon cancer was performed via a minilaparotomy (skin incision < or =7 cm) utilizing specific instruments (North-bridge retractor system) between September 2002 and March 2005, and 94 patients (second group), in whom a similar procedure was performed without utilizing specific instruments between April 2005 and October 2007. RESULTS The two groups did not differ significantly in terms of age, sex, body mass index, site of tumor, level of lymph node dissection, blood loss, UICC stage, number of harvested lymph nodes, incidence of postoperative complications, length of postoperative hospital days, or overall survival, although the frequency of prior abdominal surgery was higher (38.3 vs. 21.9%; P = 0.03) and the median operating time required for a standard lymph node dissection was shorter (120 vs. 135 min; P = 0.03) in the second group. CONCLUSION With improved techniques and experience, specific instruments are not necessary for the performance of a curative colectomy via a minilaparotomy approach.
Collapse
Affiliation(s)
- H Ishida
- Department of Digestive Tract and General Surgery, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
32
|
Ishiguro T, Matsushita H, Yanase T, Kurabayashi T, Yoshida S, Iinuma Y. Intrauterine fetal demise due to streptococcal toxic shock syndrome: a case report. CLIN EXP OBSTET GYN 2010; 37:226-228. [PMID: 21077531] [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: 05/30/2023]
Abstract
BACKGROUND Toxic shock syndrome caused by group A streptococci (GAS) is rare around the time of delivery, but it may predispose pregnant women to a life-threatening condition. CASE A 32-year-old primigravida at 21 weeks of gestation was taken to our hospital with acute severe abdominal pain following fever. On admission the fetus was found to be dead, and intrauterine fetal demise due to placental abruption was suspected. An emergency cesarean section found no sign of placental abruption. Soon after the surgery, the patient went into shock but was successfully treated with intensive care. Although repeated blood cultures failed to detect microorganisms, the patient was positive for streptococcal pyrogenic toxin A, which is a superantigen of GAS. CONCLUSION Once GAS infection is suspected, regardless of negative blood cultures, supportive care in the intensive care unit is mandatory.
Collapse
Affiliation(s)
- T Ishiguro
- Department of Obstetrics & Gynecology, Niigata City General Hospital, Niigata, Japan
| | | | | | | | | | | |
Collapse
|
33
|
Ishikawa K, Ishiguro T, Takahashi M, Sato N, Amino T, Niimi Y, Mizusawa H. [Molecular genetic approach to spinocerebellar ataxias]. Rinsho Shinkeigaku 2009; 49:907-9. [PMID: 20030245 DOI: 10.5692/clinicalneurol.49.907] [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] [Indexed: 11/05/2022]
Abstract
Spinocerebellar ataxia (SCA) is a group of degenerative ataxias with autosomal dominant inheritance. The most common form of mutation that causes SCA is the expansion of trinucleotide (CAG) repeat encoding polyglutamine. These "polyglutamine disorders" are, SCA1, SCA2, Machado-Joseph disease, SCA6, SCA7, SCA17 and DRPLA. Another dynamic mutation, yet a non-coding one, has been identified as the cause of SCA8, SCA10 and SCA12. This mutation includes, trinucleotide (CAG/CTG) expansion causing SCA8 and SCA12, and pentanuclotide (ATTCT) expansion leading SCA10. In addition to these dynamic mutations, static mutations, such as missense mutations and deletions, have been identified to cause SCA5, SCA11, SCA13, SCA14, SCA15 and SCA27. Since 1992, authors have been involved in identifying the mutation (s) of autosomal dominant cerebellar ataxia with rather pure cerebellar syndrome (ADCAIII). About a half of our cohort with ADCAIII were SCA6, caused by a small CAG repeat expansion in the alpha1A-voltage-dependent calcium channel gene. Recent study in patients' brains suggested that a small polyglutamine expansion leads a portion of this channel protein to aggregate in the Purkinje cell. Another type of ADCAIII is the chromosome 16q22.1-linked ADCA. By a comprehensive positional cloning strategy, we have found a genetic change that segregate with the disease. Identifying the mutation of 16q-ADCA is imperative for understanding molecular basis of this disease.
Collapse
Affiliation(s)
- Kinya Ishikawa
- Department of Neurology and Neurological Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | | | | | | | | | | | | |
Collapse
|
34
|
Ishibashi K, Okada N, Ishiguro T, Yokoyama M, Miyazaki T, Sano M, Yamada H, Ishida H. Polymorphisms of GSTP1, GSTT1, GSTM1, MTHFR, TS, ERCC1, and ERCC2 in metastatic colorectal cancer treated by first-line mFOLFOX6 chemotherapy. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e14628] [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] [Indexed: 11/20/2022] Open
Abstract
e14628 Background: It was reported that determining functional polymorphisms of genes involved in drug-metabolising pathways and DNA repair may be useful for predicting the response to 5-FU/oxaliplatin chemotherapy in Caucasian patients with metastatic colorectal cancer. This study was performed to examine whether determining these polymorphisms had any clinical value in Asian patients with colorectal cancer receiving 5-FU/oxaliplatin therapy. Methods: Genomic DNA was extracted from peripheral blood lymphocytes (n=25) or colonic mucosa (n=47) in Japanese patients with metastatic colorectal cancer who were receiving first-line therapy with the modified FOLFOX6 regimen followed by FOLFIRI (n=42). Polymorphisms of 5 genes involved in drug metabolism (glutathione S-transferase (GST) P1 (IIe 105 Val), GSTT1 deletion, and GSTM1 deletion, methylenetetrahydrofolate reductase (MTHFR) (Ala 677 Val), and a 6-base pair (bp) deletion in the 3’-untranslated region (UTR) of thymidylate synthase (TS)), and polymorphisms of two DNA repair genes (excision repair cross complementing group 1 (ERCC1): Asp 118 Asn and ERCC2: Lys 751 Gln) were assessed in these patients by PCR-RFLP or the invader technique. Correlations between polymorphisms of these genes and the response to therapy were evaluated. Results: The distribution of the genotypes of GSTP1, GSTT1, TS, ERCC1, and ERCC2 in the present Japanese patients (but not that of GSTM1 or MTHFR), differed significantly from the distribution of these genotypes in a Caucasian population. The response rate and progression-free survival were not correlated with any of the functional polymorphisms investigated. However, patients who had both alleles containing the 6-bp nucleotide fragment in the 3’UTR of TS showed significantly shorter overall survival than those who had at least one allele without the 6-bp nucleotide fragment (p=0.03). Conclusions: These results suggest that 3’UTR polymorphism of TS may be an important predictor of overall survival for Japanese patients with metastatic colorectal cancer receiving first-line 5-FU/oxaliplatin therapy. No significant financial relationships to disclose.
Collapse
Affiliation(s)
- K. Ishibashi
- Saitama Medical Center,Saitama Medical University, Saitama, Japan; Sekishindo Hospital, Saitama, Japan
| | - N. Okada
- Saitama Medical Center,Saitama Medical University, Saitama, Japan; Sekishindo Hospital, Saitama, Japan
| | - T. Ishiguro
- Saitama Medical Center,Saitama Medical University, Saitama, Japan; Sekishindo Hospital, Saitama, Japan
| | - M. Yokoyama
- Saitama Medical Center,Saitama Medical University, Saitama, Japan; Sekishindo Hospital, Saitama, Japan
| | - T. Miyazaki
- Saitama Medical Center,Saitama Medical University, Saitama, Japan; Sekishindo Hospital, Saitama, Japan
| | - M. Sano
- Saitama Medical Center,Saitama Medical University, Saitama, Japan; Sekishindo Hospital, Saitama, Japan
| | - H. Yamada
- Saitama Medical Center,Saitama Medical University, Saitama, Japan; Sekishindo Hospital, Saitama, Japan
| | - H. Ishida
- Saitama Medical Center,Saitama Medical University, Saitama, Japan; Sekishindo Hospital, Saitama, Japan
| |
Collapse
|
35
|
Ishiura Y, Fujimura M, Yamamoto H, Ishiguro T, Ohkura N, Myou S. COX-2 inhibition attenuates cough reflex sensitivity to inhaled capsaicin in patients with asthma. J Investig Allergol Clin Immunol 2009; 19:370-374. [PMID: 19862936] [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: 05/28/2023] Open
Abstract
BACKGROUND AND OBJECTIVE Cyclooxygenase (COX) is an enzyme that converts arachidonic acid to prostanoids. There are two isoforms of COX, namely COX-1 and COX-2. COX-2 is highly inducible by several stimuli and is associated with inflammation. Recent studies have shown that COX-2 is upregulated in the airway epithelium of patients with asthma but little is known about the role it plays in cough, a common symptom of bronchial asthma. This study was designed to investigate the role of COX-2 in cough reflex sensitivity in patients with asthma. PATIENTS AND METHODS The effect of etodolac, a potent COX-2 inhibitor, on cough response to inhaled capsaicin was examined in 17 patients with stable asthma in a randomized, placebo-controlled crossover study. Capsaicin cough threshold, defined as the lowest concentration of capsaicin eliciting 5 or more coughs, was measured as an index of airway cough reflex sensitivity. RESULTS The geometric mean (geometric SEM) cough threshold was significantly increased after a 2-week treatment program with oral etodolac (200 mg twice a day) compared with placebo (36.7 [1.2] vs 21.6 [1.2] gM, P<.02). CONCLUSIONS These findings indicate that COX-2 may be a possible modulator augmenting airway cough reflex sensitivity in asthmatic airways.
Collapse
Affiliation(s)
- Y Ishiura
- Department of Internal Medicine, Toyama City Hospital, Toyama, Japan. ishiura-@p2322.nsk.ne.jp
| | | | | | | | | | | |
Collapse
|
36
|
Ishibashi K, Okada N, Ishiguro T, Yokoyama M, Miyazaki T, Matsuki M, Sano M, Ishida H. Effect of Ca/Mg on neurotoxicity and blood concentration of platinum in patients on mFOLFOX6 therapy: A prospective randomized study. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.20639] [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
|
37
|
Jin H, Ishikawa K, Tsunemi T, Ishiguro T, Amino T, Mizusawa H. Analyses of copy number and mRNA expression level of the alpha-synuclein gene in multiple system atrophy. J Med Dent Sci 2008; 55:145-153. [PMID: 19845160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Multiple system atrophy (MSA) is a sporadic neurodegenerative disease manifested clinically by progressive ataxia, parkinsonism, and autonomic dysfunction. Its cause is unknown, and there is no curative therapy. Alpha-synuclein is an important protein forming aggregations called glial cytoplasmic inclusions (GCIs) in oligodendroglia; these aggregations are considered important in MSA pathogenesis. Overexpression of the human alpha-synuclein gene in mice induces the formation of GCI-like aggregations in oligodendrocytes, leading mice to exhibit neurological signs similar to those in MSA patients. However, previous studies have excluded mutations within the coding region of the alpha-synuclein gene in MSA patients. To determine whether alteration in the expression level of the alpha-synuclein gene is associated with MSA pathogenesis, we used TaqMan quantitative PCR assay to analyze the alpha-synuclein gene copy number in patients' genomes. We also used quantitative RT-PCR and in situ hybridization to analyze alpha-synuclein mRNA expression in MSA patients' brain tissues. We found no alteration in the alpha-synuclein gene copy number in the patients' genomes (n = 50). Quantitative analysis for alpha-synuclein mRNA by the TaqMan method showed that alpha-synuclein mRNA levels were comparable between control (n = 3) and MSA (n = 3) cerebella. On in situ hybridization, the number of neurons with alpha-synuclein mRNA expression was no greater in the cerebella of MSA patients (n = 3) than in the controls (n = 3). However, GCIs were seen in these MSA specimens on immunohistochemistry for alpha-synuclein. These results suggest that alpha-synuclein gene expression is not the fundamental cause of MSA.
Collapse
Affiliation(s)
- Honglian Jin
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku 113-8519, Tokyo, Japan
| | | | | | | | | | | |
Collapse
|
38
|
Abstract
The localization of phytate on tofu making and its effects on tofu texture were investigated. Thirty-eight percent and 3% of phytate in soymilk were bound to soluble protein and particulate protein, respectively, and the others were in free form. In the early stage of curd formation, phytate bound to particulate proteins and then a large part of phytate was taken into the tofu curd. Increase of phytate contents in soymilk resulted in the increase of coagulant requirement to make firm tofu. Optimal coagulant concentration (OCC) for making tofu was influenced by phytate contents. The increase of phytate in tofu caused decrease of hardness at OCC and resulted in the increase of brittleness and viscosity of tofu. We concluded that the phytate content is one important factor that contributes to tofu texture.
Collapse
Affiliation(s)
- T Ishiguro
- The United Graduate School of Agricultural Sciences, Iwate Univ., 3-18-8 Ueda, Morioka, Iwate 020-8550, Japan
| | | | | |
Collapse
|
39
|
Lin JX, Ishikawa K, Sakamoto M, Tsunemi T, Ishiguro T, Amino T, Toru S, Kondo I, Mizusawa H. Direct and accurate measurement of CAG repeat configuration in the ataxin-1 (ATXN-1) gene by "dual-fluorescence labeled PCR-restriction fragment length analysis". J Hum Genet 2008; 53:287-295. [PMID: 18301861 DOI: 10.1007/s10038-007-0242-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2007] [Accepted: 12/15/2007] [Indexed: 10/22/2022]
Abstract
Spinocerebellar ataxia type 1 (SCA1; OMIM: #164400) is an autosomal dominant cerebellar ataxia caused by an expansion of CAG repeat, which encodes polyglutamine, in the ataxin-1 (ATXN1) gene. Length of polyglutamine in the ATXN1 protein is the critical determinant of pathogenesis of this disease. Molecular diagnosis of SCA1 is usually undertaken by assessing the length of CAG repeat configuration using primers spanning this configuration. However, this conventional method may potentially lead to misdiagnosis in assessing polyglutamine-encoding CAG repeat length, since CAT interruptions may be present within the CAG repeat configuration, not only in normal controls but also in neurologically symptomatic subjects. We developed a new method for assessing actual CAG repeat numbers not interrupted by CAT sequences. Polymerase chain reaction using a primer pair labeled with two different fluorescences followed by restriction enzyme digestion with SfaNI which recognizes the sequence "GCATC(N)(5)", lengths of actual CAG repeats that encode polyglutamine were directly detected. We named this method "dual fluorescence labeled PCR-restriction fragment length analysis". We found that numbers of actual CAG repeat encoding polyglutamine do not overlap between our cohorts of normal chromosomes (n=385) and SCA1 chromosomes (n=5). We conclude that the present method is a useful way for molecular diagnosis of SCA1.
Collapse
Affiliation(s)
- Jiang X Lin
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo, 113-8519, Japan
| | - Kinya Ishikawa
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo, 113-8519, Japan.
| | - Masaki Sakamoto
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo, 113-8519, Japan
| | - Taiji Tsunemi
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo, 113-8519, Japan
| | - Taro Ishiguro
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo, 113-8519, Japan
| | - Takeshi Amino
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo, 113-8519, Japan
| | - Shuta Toru
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo, 113-8519, Japan
| | - Ikuko Kondo
- Department of Medical Genetics, Ehime University, Onsen-gun, Ehime, Japan.,Ibaraki Prefectural Child Welfare Health Center, Yoshizawa-cho 3979-3, Mito, Ibaraki, 310-0845, Japan
| | - Hidehiro Mizusawa
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo, 113-8519, Japan
| |
Collapse
|
40
|
Amino T, Ishikawa K, Toru S, Ishiguro T, Sato N, Tsunemi T, Murata M, Kobayashi K, Inazawa J, Toda T, Mizusawa H. Redefining the disease locus of 16q22.1-linked autosomal dominant cerebellar ataxia. J Hum Genet 2007; 52:643-649. [PMID: 17611710 DOI: 10.1007/s10038-007-0154-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2007] [Accepted: 05/02/2007] [Indexed: 10/23/2022]
Abstract
The 16q22.1-linked autosomal dominant cerebellar ataxia (16q-ADCA; Online Mendelian Inheritance in Man [OMIN] #117210) is one of the most common ADCAs in Japan. Previously, we had reported that the patients share a common haplotype by founder effect and that a C-to-T substitution (-16C>T) in the puratrophin-1 gene was strongly associated with the disease. However, recently, an exceptional patient without the substitution was reported, indicating that a true pathogenic mutation might be present elsewhere. In this study, we clarified the disease locus more definitely by the haplotype analysis of families showing pure cerebellar ataxia. In addition to microsatellite markers, the single nucleotide polymorphisms (SNPs) that we identified on the disease chromosome were examined to confirm the borders of the disease locus. The analysis of 64 families with the -16C>T substitution in the puratrophin-1 gene revealed one family showing an ancestral recombination event between SNP04 and SNP05 on the disease chromosome. The analysis of 22 families without identifiable genetic mutations revealed another family carrying the common haplotype centromeric to the puratrophin-1 gene, but lacking the -16C>T substitution in this gene. We concluded that the disease locus of 16q-ADCA was definitely confined to a 900-kb genomic region between the SNP04 and the -16C>T substitution in the puratrophin-1 gene in 16q22.1.
Collapse
Affiliation(s)
- Takeshi Amino
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan
| | - Kinya Ishikawa
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan.
| | - Shuta Toru
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan
| | - Taro Ishiguro
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan
| | - Nozomu Sato
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan
| | - Taiji Tsunemi
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan
| | - Miho Murata
- Department of Neurology, Musashi Hospital, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Kazuhiro Kobayashi
- Division of Clinical Genetics, Department of Medical Genetics, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Johji Inazawa
- Department of Molecular Cytogenetics, Medical Research Institute and School of Biomedical Science, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tatsushi Toda
- Division of Clinical Genetics, Department of Medical Genetics, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hidehiro Mizusawa
- Department of Neurology and Neurological Science, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan.
| |
Collapse
|
41
|
Ishiguro T, Itoh Y, Yabe Y, Hashizume N. Extension block with Kirschner wire for fracture dislocation of the distal interphalangeal joint. Tech Hand Up Extrem Surg 2006; 1:95-102. [PMID: 16609513 DOI: 10.1097/00130911-199706000-00005] [Citation(s) in RCA: 116] [Impact Index Per Article: 6.4] [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)
- T Ishiguro
- Ishiguro Orthopaedic Clinic, Ashigara-shimogen, Kanagawa, Japan
| | | | | | | |
Collapse
|
42
|
Abstract
A 15-year-old, male neutered cat was referred for investigation of dysuria. A retrograde urethrography was performed which showed two space-occupying masses within the lumen of the mid-to-proximal urethra. Exploratory coeliotomy revealed two urethral masses. Segmental urethrectomy was performed to resect the mass, and the lower urinary tract was reconstructed by vesico-urethral anastomosis. Histopathology showed the mass to be a transitional cell carcinoma with incomplete surgical margins. Tumour regrowth was suspected when dysuria was found approximately 318 days after surgery. Clinical signs were palliated by radiation using weekly fractions of 6 Gy for three weeks. The cat died of unknown causes 386 days postoperatively.
Collapse
Affiliation(s)
- S Takagi
- Laboratory of Veterinary Surgery, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
| | | | | | | | | | | |
Collapse
|
43
|
Nishio A, Ohata K, Tsuyuguchi N, Gotoh T, Ishiguro T, Kawakami T, Hara M. Pitfalls during the Embolization and Evaluation after the Embolization for the Skull Base Meningiomas. Interv Neuroradiol 2006; 12:252-7. [DOI: 10.1177/15910199060120s146] [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: 12/03/2005] [Accepted: 12/15/2005] [Indexed: 11/16/2022] Open
Abstract
Pitfall during the embolization and evaluation after the embolization for skull base meningiomas supplied by meningeal arteries of internal carotid artery (ICA) are reported. This study includes 15 cases of skull base meningiomas (two males and 13 females) that supplied by meningeal branches of internal carotid artery. The preoperative embolization was performed by these feeders. MRI findings and serum levels of C-reactive protein (CRP) after the embolization were examined. In ten patients among 15 patients the meningeal branches of ICA were dominant feeders. In ten patients out of 15 patients, the embolization from the meningeal branches of ICA was possible. Eight patients out of these ten patients were suffered from high fever and increase of serum level of CRP after the embolization. During the embolization for skull base meningiomas, the existence of collateral pathways between the ICA system and external carotid artery system were identified. The increase of serum levels of CRP might be recognized in the patients that effective embolization were performed.
Collapse
Affiliation(s)
- A. Nishio
- Department of Neurosurgery Osaka City University Graduate School of Medicine, Osaka; Japan
| | - K. Ohata
- Department of Neurosurgery Osaka City University Graduate School of Medicine, Osaka; Japan
| | - N. Tsuyuguchi
- Department of Neurosurgery Osaka City University Graduate School of Medicine, Osaka; Japan
| | - T. Gotoh
- Department of Neurosurgery Osaka City University Graduate School of Medicine, Osaka; Japan
| | - T. Ishiguro
- Department of Neurosurgery Osaka City University Graduate School of Medicine, Osaka; Japan
| | - T. Kawakami
- Department of Neurosurgery Osaka City University Graduate School of Medicine, Osaka; Japan
| | - M. Hara
- Department of Neurosurgery Osaka City University Graduate School of Medicine, Osaka; Japan
| |
Collapse
|
44
|
Mizuguchi H, Mizuno H, Yasukawa K, Ishiguro T, Fukui K, Imanaka T, Takagi M. Enhanced signal transduction by a directly fused protein of interleukin-6 and its receptor. J Biosci Bioeng 2005; 91:299-304. [PMID: 16232993 DOI: 10.1263/jbb.91.299] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2000] [Accepted: 12/23/2000] [Indexed: 11/17/2022]
Abstract
In order to develop a new type of agonist for the interleukin 6 (IL-6) signal, the gene encoding a directly fused protein (DFP) was constructed by joining the N-terminal portion of IL-6 and the C-terminal (soluble) portion of IL-6R (sIL-6R) without using a flexible polypeptide linker. The biological activity if DFP from a recombinant Pichia pastoris was examined by growth stimulation of IL-6-dependent BAF130 cells expressing human gp130, a membrane receptor. The recombinant DFP exhibited a much stronger growth stimulation (10 times) than the independent IL-6 and sIL-6R (IL-6/sIL-6R), mainly because association of the IL-6 and IL-6R could be maintained even at lower concentrations of DFP. Surface plasmon resonance (SPR) analysis showed that DFP bound to the extracellular portion of gp130 in the biphasic mode, and the dissociation constants of DFP for two phases were the same as those of IL-6/sIL-6R. In cells treated with DFP, stimulation of Stat3 phosphorylation was maintained for a longer period (150 min) than in cells treated with IL6/Il-6R, suggesting that the signal mediated by the DFP was more durable than that mediated by IL-6/sIL-6R, although the signal transduction mechanisms are almost the same for both DFP and IL-6/IL-6R. Therefore, the stronger activity of DFP was attributed to the maintained association of its subunits and/or prolonged phosphorylation of Stat3.
Collapse
Affiliation(s)
- H Mizuguchi
- Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | | | | | | | | | | | | |
Collapse
|
45
|
Sawa T, Yoshida T, Ishiguro T, Mimori T, Sawada M, Ohno Y, Fujiwara H. P-569 Efficacy and survival benefit of prophylactic Shakuyaku-Kanzou-Tofor myalgia/arthralgia following carboplatin and paclitaxel combination chemotherapy for non-small cell lung cancer. Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)81062-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
46
|
Saitoh J, Taya T, Horie R, Hayashi T, Ishiguro T. Homogenous simultaneous detection of HCV RNA and internal control by two-color fluorescence real-time monitoring of isothermal sequence amplification with INAF probes. Nucleic Acids Symp Ser 2003:191-2. [PMID: 12903333 DOI: 10.1093/nass/44.1.191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
We demonstrated the homogenous simultaneous detection of HCV RNA and internal control by two-color fluorescence real-time monitoring of isothermal sequence amplification with INAF probes.
Collapse
Affiliation(s)
- J Saitoh
- Tokyo Research Laboratories, Tosoh Corporation, 2743-1, Hayakawa, Ayase-shi, Kanagawa 252-1123, Japan
| | | | | | | | | |
Collapse
|
47
|
Kim G, Okumura M, Bosnakovski D, Ishiguro T, Kadosawa T, Fujinaga T. Biological Properties of Allogenic Articular Chondrocytes on the Surface of Bovine Cartilage Explants in vitro. ACTA ACUST UNITED AC 2003; 50:418-23. [PMID: 14633221 DOI: 10.1046/j.1439-0442.2003.00570.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Bovine cartilage explants were co-cultured with or without allogenic chondrocytes for 4 weeks. The attachment of the applied chondrocytes to cartilage after labelling with fluorescence was assessed using a confocal laser microscope. Morphological changes and the production of extracellular matrix (ECM) of co-cultured chondrocytes on intact and damaged surfaces of cartilage were evaluated by histological and immunohistochemical methods. Co-cultured chondrocytes attached to and proliferated on the intact and damaged areas of cartilage, and a new layer was created there. The defects were also filled with ECM produced by the co-cultured chondrocytes. Glycosaminoglycans and collagen type II were detected in the newly formed ECM, and large numbers of rounded chondrocytes were observed at primitive lacunae in this matrix at 4 weeks of culture. The results suggest that chondrocytes have the ability to attach to, to proliferate on and to establish a new matrix on the intact and damaged surfaces of cartilage explants.
Collapse
Affiliation(s)
- G Kim
- Laboratory of Veterinary Surgery, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan.
| | | | | | | | | | | |
Collapse
|
48
|
Matsumoto N, Yoshizawa H, Kagamu H, Abe T, Fujita N, Watanabe S, Kuriyama H, Ishiguro T, Tanaka J, Suzuki E, Kobayashi K, Gemma A, Kudoh S, Gejyo F. Successful liquid storage of peripheral blood stem cells at subzero non-freezing temperature. Bone Marrow Transplant 2002; 30:777-84. [PMID: 12439701 DOI: 10.1038/sj.bmt.1703692] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2002] [Accepted: 05/30/2002] [Indexed: 11/09/2022]
Abstract
Although non-frozen storage of peripheral blood stem cells (PBSC) has been extensively studied and utilized clinically, the optimal storage conditions have not been determined. In order to improve the maintenance of clonogenic capacity during storage, we evaluated the feasibility of subzero non-freezing preservation of PBSC and attempted to determine the optimal conditions. Human PBSC were stored in different non-cryopreserved conditions. University of Wisconsin (UW) solution was used as the storage medium for PBSC. The stem cell integrity was optimally maintained when PBSC were preserved in a supercooled state at -2 degrees C in UW solution without any cryoprotectants, and the highest values for nucleated cell survival (91.6%), CFU-GM survival (67.3%) and trypan blue viability (92%) were achieved at 72 h. CFU-GM survival in our storage conditions was significantly better than the survival achieved with hypothermic preservation in autologous serum and ACD-A solution at 4 degrees C (67.3 +/- 9.2% vs 42.9 +/- 15.3%; P < 0.01) or cryopreservation at -80 degrees C (67.3 +/- 9.2% vs 52.7 +/- 10.7%; P < 0.01). Thus, the combination of supercooling and UW solution was the optimal non-freezing method of preserving transplantable PBSC tested here. This method is of clinical utility in peripheral blood stem cell transplantation (PBSCT) for its simplicity and storage efficiency, and has value as a short-term storage method for PBSC to support dose-intensive multicyclic chemotherapy.
Collapse
Affiliation(s)
- N Matsumoto
- Division of Respiratory Medicine, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Komiyama M, Ishiguro T, Matsusaka Y, Yasui T, Nishio A. Transfemoral, transvenous embolisation of dural arteriovenous fistula involving the isolated transverse-sigmoid sinus from the contralateral side. Acta Neurochir (Wien) 2002; 144:1041-6; discussion 1046. [PMID: 12382132 DOI: 10.1007/s00701-002-0997-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
BACKGROUND A dural arteriovenous fistula (AVF) involving the transverse-sigmoid (T-S) sinus which is occluded at its proximal and distal ends i.e., an isolated sinus, runs the risk of haemorrhaging or causing serious neurological deficits as a result of its retrograde leptomeningeal venous drainage. While lesions of this type have not been considered to be treatable by percutaneous, transvenous embolisation, this paper challenges this view. CASE PRESENTATION Two middle-aged men with dural AVFs involving the isolated left T-S sinus presented with motor aphasia due to focal brain edema or haemorrhage. Under local anaesthesia, transfemoral, transvenous embolisation was performed with a microcatheter that was passed through the occluded proximal transverse sinus from the right (contralateral) side. The isolated sinus was then occluded with platinum coils. This embolisation resulted in angiographic and clinical cure of dural AVFs in both patients. INTERPRETATION Transfemoral, transvenous embolisation is a therapeutic alternative for the treatment of dural AVFs involving the isolated T-S sinus. Embolisation obviates the need for craniotomy and general anaesthesia, which are required for the established modes of treatment, i.e., direct surgery or direct percutaneous sinus packing.
Collapse
Affiliation(s)
- M Komiyama
- Department of Neurosurgery, Osaka City General Hospital, Osaka, Japan
| | | | | | | | | |
Collapse
|
50
|
Komiyama M, Morikawa T, Ishiguro T, Matsusaka Y, Yasui T. Anterior choroidal artery variant and acute embolic stroke. Case report. Interv Neuroradiol 2002; 8:313-316. [PMID: 20594490 PMCID: PMC3572485 DOI: 10.1177/159101990200800312] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2002] [Accepted: 08/17/2008] [Indexed: 02/02/2024] Open
Abstract
The anterior choroidal artery has the cortical branches to the temporal, parietal, and occipital lobes in the early embryological stage, which later become the posterior cerebral artery distal to the posterior communicating artery (P2-4). Acute embolic stroke occurred in a 57-year-old man with an anterior choroidal artery having such a persistent embryonic branch to the temporal lobe. Recognition of this embryological form of the anterior choroidal artery is clinically important in acute cerebral ischaemia because the cerebral region between the territories supplied by the middle cerebral artery and the anterior choroidal artery is shown on carotid angiography as an avascular area, which could be misunderstood as a region of the acute ischaemia.
Collapse
Affiliation(s)
- M Komiyama
- Department of Neurosurgery, Osaka City General Hospital, Osaka; Japan -
| | | | | | | | | |
Collapse
|