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Matsuzawa R, Morise M, Ito K, Hataji O, Takahashi K, Kuwatsuka Y, Goto Y, Imaizumi K, Itani H, Yamaguchi T, Zenke Y, Oki M, Ishii M. 46P Multi-center, phase II study of docetaxel (DTX) plus ramucirumab (RAM) following platinum-based chemotherapy plus ICIs in patients with NSCLC: SCORPION study. J Thorac Oncol 2023. [DOI: 10.1016/s1556-0864(23)00300-3] [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: 04/04/2023]
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Tamiya M, Goto Y, Kenmotsu H, Kurata T, Murakami S, Yanagitani N, Taniguchi H, Kuyama S, Shimizu J, Yokoyama T, Shimada N, T. M, Tamiya A, Uchiyama A, Imaizumi K, Takahama T, Nishio M, Hayashi H, Shiraiwa N, Okura M, Kikkawa H, Thomaidou D, Kato T. EP08.02-115 A Retrospective, Multicenter, Observational Study to Evaluate Outcomes With Lorlatinib After Alectinib in ALK+ NSCLC in Japan. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.798] [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: 10/14/2022]
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Matsuzawa R, Morise M, Ito K, Hataji O, Takahashi K, Hara T, Goto Y, Imaizumi K, Itani H, Yamaguchi T, Zenke Y, Oki M, Kogure Y, Hashimoto N. P47.14 Study Design of SCORPION: Multi-Center, Phase II Study Following Platinum-Based Chemotherapy Plus ICIs in Patients with NSCLC. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.507] [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: 10/20/2022]
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Sagara H, Sekiryu T, Imaizumi K, Shintake H, Sugiyama U, Maehara H. Impact of tear metrics on the reliability of perimetry in patients with dry eye. PLoS One 2019; 14:e0222467. [PMID: 31527920 PMCID: PMC6748565 DOI: 10.1371/journal.pone.0222467] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 08/30/2019] [Indexed: 11/20/2022] Open
Abstract
Background The application of artificial tears before performing perimetry can improve the reliability and results of perimetry in patients with glaucoma and dry eye (DE). However, the effects of ocular surface and tear film conditions on perimetry measurements and reliability have not been fully characterized. Methods This prospective, cross-sectional, multicenter study investigated tear metrics in perimetry and assessed the relationships that existed among ocular surface condition, tear condition, and perimetry reliability. Forty-three eyes (43 patients) with DE disease according to the 2016 Japanese diagnostic criteria of DE and 43 eyes (43 subjects) of age- and visual field mean deviation-matched normal control subjects were studied. Perimetry was performed using the Humphrey Field Analyzer (30–2 SITA-Standard). Schirmer’s test, strip meniscometry value, blink rate, tear film break-up time (TFBUT), fluorescein staining of ocular surface, and Dry Eye-related Quality of Life Score (DEQS) were measured. Blink rate was re-measured during perimetry. TFBUT and fluorescein staining were re-evaluated after perimetry. Perimetry reliability was evaluated with fixation loss, false-positive, and false-negative rates. Results Blink rate during perimetry was significantly lower for both patients with DE and normal controls (both P<0.001). TFBUT after perimetry was significantly higher than before perimetry in patients with DE (P<0.001). Fluorescein staining of ocular surface was significantly increased in patients with DE and normal control subjects (P = 0.002 and P<0.001, respectively). Spearman correlation analysis revealed that blink rate during perimetry was negatively correlated with fixation-loss rate (r = -0.393, P = 0.009) in patients with DE. Conclusions Performing perimetry was associated with a significant change in tear condition and ocular surface condition in both patients with DE and normal control subjects. The changes in tear condition and ocular surface condition may impact the reliability of perimetry in patients with DE.
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Affiliation(s)
- Hideto Sagara
- The Marui Eye Clinic, Minamisoma City, Fukushima, Japan
- Department of Ophthalmology, Fukushima Medical University School of Medicine, Fukushima City, Fukushima, Japan
- * E-mail:
| | - Tetsuju Sekiryu
- Department of Ophthalmology, Fukushima Medical University School of Medicine, Fukushima City, Fukushima, Japan
| | - Kimihiro Imaizumi
- Department of Ophthalmology, Fukushima Medical University School of Medicine, Fukushima City, Fukushima, Japan
| | - Hiroaki Shintake
- Department of Ophthalmology, Fukushima Medical University School of Medicine, Fukushima City, Fukushima, Japan
| | - Urara Sugiyama
- Department of Ophthalmology, Fukushima Medical University School of Medicine, Fukushima City, Fukushima, Japan
| | - Hiroki Maehara
- Department of Ophthalmology, Fukushima Medical University School of Medicine, Fukushima City, Fukushima, Japan
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Yamaguchi T, Morikawa S, Yuko O, Asada K, Oguri T, Inui N, Ito K, Kimura T, Kunii E, Matsui T, Kubo A, Kato T, Shindo J, Tsuda T, Okuno M, Hida T, Imaizumi K. P083 Efficacy of EGFR-TKIs in Patients Harboring EGFR Mutations with Non-Adenocartinoma Histology. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.10.096] [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: 11/17/2022]
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Tanaka K, Inui N, Asada K, Abe T, Hataji O, Hayai S, Ito K, Imaizumi K, Kimura T, Kubo A, Kunii E, Murotani K, Okuno M, Oya Y, Shindoh J, Taniguchi H, Tsuda T, Yamaguchi T, Hida T, Suda T. Real-world data of EGFR minor mutated NSCLC treated with EGFR-TKI: Comparative analysis including compound mutation and de novo T790M mutation. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy425.032] [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: 11/12/2022] Open
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Ito K, Murotani K, Kubo A, Kunii E, Taniguchi H, Shindo J, Asada K, Imaizumi K, Tanaka K, Inui N, Okuno M, Hataji O, Hayai S, Abe T, Kimura T, Tsuda T, Yamaguchi T, Oya Y, Yoshida T, Hida T. Comparative analysis of overall survival using propensity score between first- and second-generation EGFR-TKI: Real world data of 1354 patients with EGFR mutant NSCLC. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy292.077] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Goto Y, Takahashi K, Saito H, Ogasawara T, Shindoh J, Kimura T, Sugino Y, Kojima E, Nomura F, Nakanishi T, Nozaki Y, Takeyama Y, Imaizumi K, Hasegawa Y. P1.01-25 Carboplatin and Pemetrexed Plus Bevacizumab After Failure of First-Line EGFR-TKI Therapy for NSCLC Harboring EGFR Mutation (CJLSG 0908). J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.581] [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: 10/28/2022]
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Imaizumi K, Tinwongger S, Kondo H, Hirono I. Disinfection of an EMS/AHPND strain of Vibrio parahaemolyticus using ozone nanobubbles. J Fish Dis 2018; 41:725-727. [PMID: 29399827 DOI: 10.1111/jfd.12783] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 12/28/2017] [Accepted: 12/29/2017] [Indexed: 05/27/2023]
Affiliation(s)
- K Imaizumi
- Laboratory of Genome Science, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - S Tinwongger
- Laboratory of Genome Science, Tokyo University of Marine Science and Technology, Tokyo, Japan
- Department of Fisheries Kasetklang Chatuchak, Coastal Fisheries Research and Development Bureau, Bangkok, Thailand
| | - H Kondo
- Laboratory of Genome Science, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - I Hirono
- Laboratory of Genome Science, Tokyo University of Marine Science and Technology, Tokyo, Japan
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Yamaguchi T, Oya Y, Kagawa Y, Furuta H, Watanabe N, Shimizu J, Horio Y, Uemura T, Morikawa S, Imaizumi K, Hida T. P2.07-028 Efficacy and Safety of Nivolumab in Non-Small Cell Lung Cancer Patients Who Relapse after Thoracic Radiotherapy. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.11.087] [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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Imaizumi K, Suzuki T, Shimomura M, Tsukada Y, Sasaki T, Nishizawa Y, Kojima M, Ito M, Nakatsura T. Immunological features of resected tumor after neoadjuvant chemotherapy (NAC) and chemoradiotherapy (CRT) become the superior prediction markers for recurrence in rectal cancer. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx393.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Uygun DS, McNally JM, Yang L, Imaizumi K, Katsuki F, Brown RE, Mao X, Nicholson T, Sidor M, Zhang Q, Strecker RE, McCarley RW, Feng G, Pan JQ. 0017 ABNORMAL SLEEP SPINDLE RHYTHMOGENESIS IN MICE BEARING A SCHIZOPHRENIA ASSOCIATED CODING VARIANT IN THE CACNA1I GENE. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.016] [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
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Ibáñez O, Vicente R, Navega D, Campomanes-Álvarez C, Cattaneo C, Jankauskas R, Huete MI, Navarro F, Hardiman R, Ruiz E, Imaizumi K, Cavalli F, Veselovskaya E, Humpire D, Cardoso J, Collini F, Mazzarelli D, Gibelli D, Damas S. MEPROCS framework for Craniofacial Superimposition: Validation study. Leg Med (Tokyo) 2016; 23:99-108. [PMID: 27890113 DOI: 10.1016/j.legalmed.2016.10.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 10/14/2016] [Accepted: 10/19/2016] [Indexed: 11/18/2022]
Abstract
Craniofacial Superimposition (CFS) involves the process of overlaying a skull with a number of ante-mortem images of an individual and the analysis of their morphological correspondence. The lack of unified working protocols and the absence of commonly accepted standards, led to contradictory consensus regarding its reliability. One of the more important aims of 'New Methodologies and Protocols of Forensic Identification by Craniofacial Superimposition (MEPROCS)' project was to propose a common framework for CFS, what can be considered the first international standard in the field. The framework aimed to serve as a roadmap for avoiding particular assumptions that could bias the process. At the same time, it provides some empirical support to certain practices, technological means, and morphological criteria expected to facilitate the application of the CFS task and to improve its reliability. In order to confirm the utility and potential benefits of the framework use, there is a need to empirically evaluate it in CFS identification scenarios as close as possible to the reality. Thus, the purpose of this study is to validate the CFS framework developed. For that aim 12 participants were asked to report about a variable number of CFS following all the recommendations of the framework. The results are analysed and discussed according to the framework understanding and fulfilment, the participants' performance, and the correlation between expected decisions and those given by the participants. In view of the quantitative results and qualitative examination criteria we can conclude that those who follow the MEPROCS recommendations improve their performance.
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Affiliation(s)
- O Ibáñez
- Department of Computer Science and Artificial Intelligence, University of Granada, Granada, Spain.
| | - R Vicente
- Forensic Sciences Centre (CENCIFOR), Coimbra, Portugal; Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - D Navega
- Forensic Sciences Centre (CENCIFOR), Coimbra, Portugal; Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | | | - C Cattaneo
- Laboratorio di Antropología e Odontologia Forense, University of Milan, Milan, Italy
| | - R Jankauskas
- Department of Anatomy, Histology and Anthropology, Vilnius University, Vilnius, Lithuania
| | - M I Huete
- Physical Anthropology Laboratory, University of Granada, Granada, Spain
| | - F Navarro
- Physical Anthropology Laboratory, University of Granada, Granada, Spain
| | - R Hardiman
- Melbourne Dental School, University of Melbourne, Melbourne, Australia
| | - E Ruiz
- Legal Medicine School, Complutense University of Madrid, Spain
| | - K Imaizumi
- National Research Institute of Police Science, Japan
| | - F Cavalli
- Research Unit of Paleoradiology and Allied Sciences, Ospedali Riuniti di Trieste, Trieste, Italy
| | - E Veselovskaya
- Institute of Ethnology and Anthropology, Russian Academy of Science, Moscow, Russia
| | | | - J Cardoso
- Crime Scene Investigation Section, Forensic Laboratory, Portuguese Criminal Police, Lisbon, Portugal
| | - F Collini
- Laboratorio di Antropología e Odontologia Forense, University of Milan, Milan, Italy
| | - D Mazzarelli
- Laboratorio di Antropología e Odontologia Forense, University of Milan, Milan, Italy
| | - D Gibelli
- Laboratorio di Antropología e Odontologia Forense, University of Milan, Milan, Italy
| | - S Damas
- Department of Computer Science and Artificial Intelligence, University of Granada, Granada, Spain
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Sagara H, Sekiryu T, Noji H, Ogasawara M, Imaizumi K, Yago K. Treatment with sodium hyaluronate eye drops in a patient who had early-onset bleb leakage after trabeculectomy with mitomycin C. Int Med Case Rep J 2015; 8:301-4. [PMID: 26664245 PMCID: PMC4669919 DOI: 10.2147/imcrj.s95334] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
We present the case of a 47-year-old man who had bilateral proliferative diabetic retinopathy and neovascular glaucoma. Schirmer I test revealed tear secretions of 5 mm and 3 mm in the right and left eyes, respectively. Tear breakup times in the right and left eyes were 7 and 8 seconds, respectively. The ocular surface staining in both eyes was scored as Grade 1 as per the Oxford scheme. Retinal photocoagulation was performed for correction of the proliferative diabetic retinopathy and rubeosis iridis, which resolved with treatment. However, the intraocular pressure in the left eye could not be adequately controlled. Therefore, trabeculectomy with mitomycin C using limbal-based conjunctival flap was performed. Three hours after the surgery, the patient developed a large and diffuse filtering bleb, but no leakage occurred from the conjunctival scar. However, on the first postoperative day, leakage was noted and the conjunctiva was at the leakage point. The leakage resolved transiently, but recurred the next day. Severe keratoconjunctival epithelial failure was detected, and the patient was administrated 0.1% sodium hyaluronate eye drops six times daily. The epithelial failure improved, and many microcysts were detected on the bleb surface where the epithelial failure improved. The leakage resolved 2 days after initiation of the sodium hyaluronate eye drops. The microcysts disappeared and the bleb surface became smooth 1 month later.
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Affiliation(s)
- Hideto Sagara
- The Marui Eye Clinic, Minamisoma, Japan ; Department of Ophthalmology, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - Tetsuju Sekiryu
- Department of Ophthalmology, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - Hiroki Noji
- Department of Ophthalmology, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - Masashi Ogasawara
- Department of Ophthalmology, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - Kimihiro Imaizumi
- Department of Ophthalmology, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - Keiko Yago
- Northern Fukushima Medical Center, Fukushima, Japan
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Damas S, Wilkinson C, Kahana T, Veselovskaya E, Abramov A, Jankauskas R, Jayaprakash PT, Ruiz E, Navarro F, Huete MI, Cunha E, Cavalli F, Clement J, Lestón P, Molinero F, Briers T, Viegas F, Imaizumi K, Humpire D, Ibáñez O. Study on the performance of different craniofacial superimposition approaches (II): Best practices proposal. Forensic Sci Int 2015; 257:504-508. [PMID: 26482539 DOI: 10.1016/j.forsciint.2015.07.045] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 05/21/2015] [Accepted: 07/27/2015] [Indexed: 11/18/2022]
Abstract
Craniofacial superimposition, although existing for one century, is still a controversial technique within the scientific community. Objective and unbiased validation studies over a significant number of cases are required to establish a more solid picture on the reliability. However, there is lack of protocols and standards in the application of the technique leading to contradictory information concerning reliability. Instead of following a uniform methodology, every expert tends to apply his own approach to the problem, based on the available technology and deep knowledge on human craniofacial anatomy, soft tissues, and their relationships. The aim of this study was to assess the reliability of different craniofacial superimposition methodologies and the corresponding technical approaches to this type of identification. With all the data generated, some of the most representative experts in craniofacial identification joined in a discussion intended to identify and agree on the most important issues that have to be considered to properly employ the craniofacial superimposition technique. As a consequence, the consortium has produced the current manuscript, which can be considered the first standard in the field; including good and bad practices, sources of error and uncertainties, technological requirements and desirable features, and finally a common scale for the craniofacial matching evaluation. Such a document is intended to be part of a more complete framework for craniofacial superimposition, to be developed during the FP7-founded project MEPROCS, which will favour and standardize its proper application.
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Affiliation(s)
- S Damas
- European Centre for Soft Computing, Mieres, Spain.
| | - C Wilkinson
- Centre for Anatomy & Human Identification, University of Dundee, UK
| | - T Kahana
- Division of Identification and Forensic Sciences, Israel National Police, Jerusalem, Israel
| | - E Veselovskaya
- Institute of Ethnology and Anthropology Russian Academy of Science, Moscow, Russia
| | - A Abramov
- Main Department of Criminalistics Investigation Committee of Russia, Moscow, Russia
| | - R Jankauskas
- Department of Anatomy, Histology and Anthropology, Vilnius University, Vilnius, Lithuania
| | - P T Jayaprakash
- Science Program, School of Health Sciences, Universiti Sains Malaysia, Kubang Kerian, Malaysia
| | - E Ruiz
- Legal Medicine School, Complutense University of Madrid, Spain
| | - F Navarro
- Physical Anthropology Laboratory, University of Granada, Granada, Spain
| | - M I Huete
- Physical Anthropology Laboratory, University of Granada, Granada, Spain
| | - E Cunha
- Forensic Sciences Centre (CENCIFOR), Coimbra, Portugal; Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - F Cavalli
- Research Unit of Paleoradiology and Allied Sciences, Ospedali Riuniti di Trieste, Trieste, Italy
| | - J Clement
- Melbourne Dental School, University of Melbourne, Melbourne, Australia
| | - P Lestón
- Department of Identification - Criminalist Services, Civil Guard, Madrid, Spain
| | - F Molinero
- Department of Identification - Criminalist Services, Civil Guard, Madrid, Spain
| | - T Briers
- South Africa Police Service, Pretoria, South Africa
| | - F Viegas
- Crime Scene Investigation Section, Forensic Laboratory, Portuguese Criminal Police, Lisbon, Portugal
| | - K Imaizumi
- National Research Institute of Police Science, Japan
| | | | - O Ibáñez
- European Centre for Soft Computing, Mieres, Spain; Department of Computer Science and Artificial Intelligence, University of Granada, Granada, Spain
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Saito M, Kano M, Itagaki K, Ise S, Imaizumi K, Sekiryu T. Subfoveal choroidal thickness in polypoidal choroidal vasculopathy after switching to intravitreal aflibercept injection. Jpn J Ophthalmol 2015; 60:35-41. [PMID: 26350229 DOI: 10.1007/s10384-015-0411-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 07/27/2015] [Indexed: 11/27/2022]
Abstract
PURPOSE To investigate the changes in subfoveal thickness after switching to intravitreal aflibercept injection for polypoidal choroidal vasculopathy (PCV). METHODS We retrospectively reviewed 66 eyes of 65 PCV patients (mean age 75.7 years) which were refractory to ranibizumab. The choroidal thickness was measured by optical coherence tomography (OCT) using an enhanced depth imaging technique. Intravitreal aflibercept (2 mg/0.05 ml) was administered with three consecutive monthly injections as a loading dose, followed by further injections bimonthly (every two months). RESULTS The mean subfoveal choroidal thickness significantly decreased from 203 μm at baseline to 171 μm at month 6 (P < 0.0001). The mean logMAR best-corrected visual acuity levels significantly improved from 0.40 at baseline to 0.33 at 6 months (P < 0.001). The central retinal thickness significantly decreased from 249 μm at baseline to 161 μm at 6 months (P < 0.0001). At month 6, 41 (62.1%) eyes had dry macula by OCT. Of 46 eyes with polypoidal lesions at baseline, complete regression of polypoidal lesions was achieved in 26 (56.5%) eyes at 3 months. CONCLUSIONS The choroidal thickness in PCV eyes significantly decreased after switching to intravitreal aflibercept injection. Aflibercept may help prevent choroidal neovascularization near or under the retinal pigment epithelium, which might help achieve greater occlusion of polypoidal lesions compared with ranibizumab.
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Affiliation(s)
- Masaaki Saito
- Department of Ophthalmology, Fukushima Medical University School of Medicine, Fukushima, Japan.
- Department of Ophthalmology and Visual Sciences, Akita University Graduate School of Medicine, 1-1-1 Hondo Akita, Akita, 010-8543, Japan.
| | - Mariko Kano
- Department of Ophthalmology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Kanako Itagaki
- Department of Ophthalmology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Shigeyuki Ise
- Department of Ophthalmology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Kimihiro Imaizumi
- Department of Ophthalmology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Tetsuju Sekiryu
- Department of Ophthalmology, Fukushima Medical University School of Medicine, Fukushima, Japan
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Abstract
AbstractA nine-year-old girl with short stature was referred to the department of pediatrics at Kyushu University. The clinical diagnosis was Turner syndrome; karyotypic analysis performed on peripheral blood, using GTG techniques, demonstrated a 45,X/47,XYY (17:83) mosaicism. Her twin brother, a phenotypically normal male, had the same karyotype; 45,X/47,XYY (3:97) on peripheral blood. Their skin fibroblast karyotypes showed the same mosaicism, ie. 45,X/47,XYY (41:59 and 31:69 respectively). On eleven biochemical genetic markers the twin pair were concordant, thus the likelihood of monozygosity was 0.99527034. In addition, the analysis of variable number of tandem repeat (VNTR) markers revealed the likelihood of monozygosity to be 0.99944386. The most plausible explanation of the X/XYY mosaicism was nondisjunction of the Y in the first cleavage division of the 46,XY zygote. A disproportionate rate of cell populations with 45,X and 47.XYY in the twinning process of the X/XYY embryo, especially in the germ lines, would result in discordant sex in twin pairs.
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Affiliation(s)
- K Kurosawa
- Division of Medical Genetics, Kanagawa Children's Medical Center, Japan
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Omi T, Tanimukai H, Kanayama D, Sakagami Y, Tagami S, Okochi M, Morihara T, Sato M, Yanagida K, Kitasyoji A, Hara H, Imaizumi K, Maurice T, Chevallier N, Marchal S, Takeda M, Kudo T. Fluvoxamine alleviates ER stress via induction of Sigma-1 receptor. Cell Death Dis 2014; 5:e1332. [PMID: 25032855 PMCID: PMC4123092 DOI: 10.1038/cddis.2014.301] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [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: 01/16/2014] [Revised: 05/16/2014] [Accepted: 06/06/2014] [Indexed: 01/02/2023]
Abstract
We recently demonstrated that endoplasmic reticulum (ER) stress induces sigma-1 receptor (Sig-1R) expression through the PERK pathway, which is one of the cell's responses to ER stress. In addition, it has been demonstrated that induction of Sig-1R can repress cell death signaling. Fluvoxamine (Flv) is a selective serotonin reuptake inhibitor (SSRI) with a high affinity for Sig-1R. In the present study, we show that treatment of neuroblastoma cells with Flv induces Sig-1R expression by increasing ATF4 translation directly, through its own activation, without involvement of the PERK pathway. The Flv-mediated induction of Sig-1R prevents neuronal cell death resulting from ER stress. Moreover, Flv-induced ER stress resistance reduces the infarct area in mice after focal cerebral ischemia. Thus, Flv, which is used frequently in clinical practice, can alleviate ER stress. This suggests that Flv could be a feasible therapy for cerebral diseases caused by ER stress.
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Affiliation(s)
- T Omi
- Department of Psychiatry, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
- Department of Psychiatry, Osaka General Medical center, Sumiyoshi-ku, Osaka, Japan
| | - H Tanimukai
- Department of Psychiatry, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - D Kanayama
- Department of Psychiatry, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Y Sakagami
- Department of Psychiatry, Osaka General Medical center, Sumiyoshi-ku, Osaka, Japan
| | - S Tagami
- Department of Psychiatry, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - M Okochi
- Department of Psychiatry, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - T Morihara
- Department of Psychiatry, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - M Sato
- Department of Psychiatry, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - K Yanagida
- Department of Psychiatry, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - A Kitasyoji
- Gifu Pharmaceutical University, Department of Biofunctional Molecules, Gifu, Japan
| | - H Hara
- Gifu Pharmaceutical University, Department of Biofunctional Molecules, Gifu, Japan
| | - K Imaizumi
- Department of Biochemistry, Graduate School of Biomedical & Health Sciences Hiroshima University, Hiroshima, Japan
| | - T Maurice
- Team II Endogenous Neuroprotection in Neurodegenerative Diseases INSERM U. 710, EPHE, University of Montpellier cc 105, place Eugene Bataillon, Montpellier cedex 5, France
| | - N Chevallier
- Team II Endogenous Neuroprotection in Neurodegenerative Diseases INSERM U. 710, EPHE, University of Montpellier cc 105, place Eugene Bataillon, Montpellier cedex 5, France
| | - S Marchal
- Team II Endogenous Neuroprotection in Neurodegenerative Diseases INSERM U. 710, EPHE, University of Montpellier cc 105, place Eugene Bataillon, Montpellier cedex 5, France
| | - M Takeda
- Department of Psychiatry, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - T Kudo
- Department of Psychiatry, Osaka University Health Care Center, Toyonaka, Osaka, Japan
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Yamaguchi T, Imaizumi K, Morikawa S, Minezawa T, Okamura T, Morishita M, Uozu S, Hayashi M, Nakanishi T, Okazawa M. Hydration in Four Hours Around the Cisplatin Infusion May Be Critical for Preventing Cisplatin-Induced Nephrotoxicity. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt460.70] [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
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Kawai M, Kirkness JP, Yamamura S, Imaizumi K, Yoshimine H, Oi K, Ayuse T. Increased phosphatidylcholine concentration in saliva reduces surface tension and improves airway patency in obstructive sleep apnoea. J Oral Rehabil 2013; 40:758-66. [DOI: 10.1111/joor.12094] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/04/2013] [Indexed: 11/27/2022]
Affiliation(s)
- M. Kawai
- Department of Clinical Physiology; Nagasaki University Graduate School of Biomedical Science; Nagasaki Japan
| | - J. P. Kirkness
- Division of Pulmonary and Critical Care Medicine; The Johns Hopkins School of Medicine; Johns Hopkins Sleep Disorders Center; Baltimore MD USA
| | | | | | - H. Yoshimine
- Department of Internal Medicine; Inoue Hospital; Nagasaki Japan
| | - K. Oi
- Department of Clinical Physiology; Nagasaki University Graduate School of Biomedical Science; Nagasaki Japan
| | - T. Ayuse
- Department of Clinical Physiology; Nagasaki University Graduate School of Biomedical Science; Nagasaki Japan
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Fukidome H, Takahashi R, Abe S, Imaizumi K, Handa H, Kang HC, Karasawa H, Suemitsu T, Otsuji T, Enta Y, Yoshigoe A, Teraoka Y, Kotsugi M, Ohkouchi T, Kinoshita T, Suemitsu M. Control of epitaxy of graphene by crystallographic orientation of a Si substrate toward device applications. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm12921j] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Igari M, Takagi M, Imaizumi K, Sato Y, Endo M, Ishii K, Nagaoka K, Miyamoto H, Kan K, Teranishi Y, Watanabe K, Hatae S. P17.11 Effects on the use of specific anti-microbial drugs and the rate of drug-resistant of organism following the introduction of notification system. J Hosp Infect 2010. [DOI: 10.1016/s0195-6701(10)60185-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Imaizumi K, Sato Y, Igari M, Ishii K, Endo M, Kan K, Teranishi Y, Hatae S, Takagi M, Miyamoto H. P11.11 The effectiveness of a hospital environment maintenance aimed at the infection prevention against Pseudomonas aeruginosa in Japan. J Hosp Infect 2010. [DOI: 10.1016/s0195-6701(10)60119-3] [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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Ichinose T, Nomura S, Someya Y, Akimoto S, Tachiyashiki K, Imaizumi K. Effect of endurance training supplemented with green tea extract on substrate metabolism during exercise in humans. Scand J Med Sci Sports 2010; 21:598-605. [DOI: 10.1111/j.1600-0838.2009.01077.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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25
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Zommara M, Hung M, Imaizumi K, Atta M. Growth parameters and tissue lipid profiles of C57PL/6N mice fed roselle seed oil. Acta Alimentaria 2009. [DOI: 10.1556/aalim.2008.0028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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26
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Oida Y, Izuta H, Oyagi A, Shimazawa M, Kudo T, Imaizumi K, Hara H. Induction of BiP, an ER-resident protein, prevents the neuronal death induced by transient forebrain ischemia in gerbil. Brain Res 2008; 1208:217-24. [PMID: 18395193 DOI: 10.1016/j.brainres.2008.02.068] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2008] [Revised: 02/15/2008] [Accepted: 02/17/2008] [Indexed: 11/18/2022]
Abstract
Endoplasmic reticulum (ER) stress, which is caused by the accumulation of unfolded proteins in the ER lumen, is associated with stroke and neurodegenerative diseases such as Parkinson's and Alzheimer's diseases. We evaluated the effect of a selective inducer of immunoglobulin heavy chain binding protein (BiP) (BiP inducer X; BIX) against both tunicamycin-induced cell death (in SH-SY5Y cells) and the effects of global transient forebrain ischemia (in gerbils). BIX significantly induced BiP expression both in vitro and in vivo. Pretreatment with BIX at 2 or 5 microM reduced the cell death induced by tunicamycin in SH-SY5Y cells. In gerbils subjected to forebrain ischemia, prior treatment with BIX (intracerebroventricular injection at 10 or 40 microg) protected against cell death and decreased TUNEL-positive cells in the hippocampal CA1 subfield. These findings indicate that this selective inducer of BiP could be used to prevent the neuronal damage both in vitro and in vivo.
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Affiliation(s)
- Y Oida
- Department of Biofunctional Evaluation, Molecular Pharmacology, Gifu Pharmaceutical University, 5-6-1 Mitahora-higashi, Gifu 502-8585, Japan
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Oida Y, Shimazawa M, Imaizumi K, Hara H. Involvement of endoplasmic reticulum stress in the neuronal death induced by transient forebrain ischemia in gerbil. Neuroscience 2008; 151:111-9. [DOI: 10.1016/j.neuroscience.2007.10.047] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2007] [Revised: 10/11/2007] [Accepted: 10/16/2007] [Indexed: 11/26/2022]
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Kudo T, Kanemoto S, Hara H, Morimoto N, Morihara T, Kimura R, Tabira T, Imaizumi K, Takeda M. A molecular chaperone inducer protects neurons from ER stress. Cell Death Differ 2007; 15:364-75. [PMID: 18049481 DOI: 10.1038/sj.cdd.4402276] [Citation(s) in RCA: 202] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
The endoplasmic reticulum (ER) stress response is a defense system for dealing with the accumulation of unfolded proteins in the ER lumen. Recent reports have shown that ER stress is involved in the pathology of some neurodegenerative diseases and cerebral ischemia. In a screen for compounds that induce the ER-mediated chaperone BiP (immunoglobulin heavy-chain binding protein)/GRP78 (78 kDa glucose-regulated protein), we identified BiP inducer X (BIX). BIX preferentially induced BiP with slight inductions of GRP94 (94 kDa glucose-regulated protein), calreticulin, and C/EBP homologous protein. The induction of BiP mRNA by BIX was mediated by activation of ER stress response elements upstream of the BiP gene, through the ATF6 (activating transcription factor 6) pathway. Pretreatment of neuroblastoma cells with BIX reduced cell death induced by ER stress. Intracerebroventricular pretreatment with BIX reduced the area of infarction due to focal cerebral ischemia in mice. In the penumbra of BIX-treated mice, ER stress-induced apoptosis was suppressed, leading to a reduction in the number of apoptotic cells. Considering these results together, it appears that BIX induces BiP to prevent neuronal death by ER stress, suggesting that it may be a potential therapeutic agent for cerebral diseases caused by ER stress.
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Affiliation(s)
- T Kudo
- Psychiatry, Department of Integrated Medicine, Division of Internal Medicine, Osaka University Graduate School of Medicine, Suita, Japan.
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Koba T, Hamada K, Sakurai M, Matsumoto K, Hayase H, Imaizumi K, Tsujimoto H, Mitsuzono R. Branched-chain amino acids supplementation attenuates the accumulation of blood lactate dehydrogenase during distance running. J Sports Med Phys Fitness 2007; 47:316-22. [PMID: 17641599] [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: 05/16/2023]
Abstract
AIM We investigated the effect of branched-chain amino acids (BCAA) supplementation on tissue damage during distance running. METHODS Eight male distance runners (mean +/- standard deviation; age: 20.4+/-1.2 years, body weight: 58.4+/-4.2 kg) participated in a double blinded cross over designed study conducted during training camp. During each intervention period, the subjects were asked to participate in a 25-km run, and the blood BCAA and lactate dehydrogenase (LDH) level, an index of tissue damage, were measured pre- and post-run. Either a drink containing BCAA (0.4% BCAA in a 4% carbohydrate solution) or an iso-calorie placebo drink was provided to the subjects 5 times during the run without any restriction in the volume. RESULTS The total volume of the drink consumed by the subjects did not differ substantially between the trials: 591+/-188 (2.36 g BCAA) vs 516+/-169 mL in BCAA and placebo trial, respectively. During the run, the blood BCAA concentration was maintained in the BCAA trial. However, the blood BCAA concentration level tended to decrease in the placebo trial (P<0.1). The extent of the blood LDH increase in the BCAA trial was significantly less than that of the placebo trail (48% vs 58%, P<0.05). CONCLUSION Maintaining the blood BCAA level throughout a long distance run contributes to a reduction in the LDH release and, therefore, the effect of BCAA supplementation is suggested to reduce the degree of muscle damage.
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Affiliation(s)
- T Koba
- Saga Nutraceuticals Research Institute, Otsuka Pharmaceutical Co. Ltd., Saga, Japan
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Morimoto N, Oida Y, Shimazawa M, Miura M, Kudo T, Imaizumi K, Hara H. Involvement of endoplasmic reticulum stress after middle cerebral artery occlusion in mice. Neuroscience 2007; 147:957-67. [PMID: 17590517 DOI: 10.1016/j.neuroscience.2007.04.017] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2007] [Revised: 04/04/2007] [Accepted: 04/05/2007] [Indexed: 11/16/2022]
Abstract
The endoplasmic reticulum (ER) plays an important role in ischemic neuronal cell death. ER stress-related markers [immunoglobulin binding protein (BiP)/glucose-regulated protein (GRP) 78, activating transcription factor-4 (ATF-4), and C/EBP-homologous protein (CHOP)] in the striatum and the cortex were investigated after permanent middle cerebral artery occlusion (MCAO) in mice. Using endoplasmic reticulum stress-activated indicator (ERAI) transgenic mice, which show splicing of X-box protein 1 (XBP-1) mRNA as green fluorescence, we monitored the regional changes in fluorescence after MCAO. BiP mRNA (by reverse-transcription polymerase chain reaction [RT-PCR] analysis) was increased in the cortex at 6 h. In immunohistochemical and/or Western blot analysis, the expressions of ER stress-related markers (BiP, ATF-4, and CHOP) were increased in the infarct region, more strongly in the cortex than in the striatum. ERAI fluorescence was observed in the ischemic area starting from 6 and 12 h, respectively, after MCAO, with the peaks at 1 day and the fluorescence co-localized with the 2,3,5-triphenyltetrazolium chloride (TTC)-visible extension of brain infarction. These findings suggest that permanent MCAO induces expression of ER-stress related genes mainly in the periphery of the MCA territory.
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Affiliation(s)
- N Morimoto
- Department of Biofunctional Molecules, Gifu Pharmaceutical University, 5-6-1 Mitahora-higashi, Gifu 502-8585, Japan
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Murakami T, Hino SI, Saito A, Imaizumi K. Endoplasmic reticulum stress response in dendrites of cultured primary neurons. Neuroscience 2007; 146:1-8. [PMID: 17367944 DOI: 10.1016/j.neuroscience.2007.01.069] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [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: 10/24/2006] [Revised: 01/09/2007] [Accepted: 01/10/2007] [Indexed: 01/21/2023]
Abstract
The endoplasmic reticulum (ER) is an organelle in which secretory and transmembrane proteins are folded or processed, and is susceptible to various stresses that provoke the accumulation of unfolded proteins in the ER lumen. Recently, ER stress has been reported to be linked to neuronal death in various neurodegenerative diseases. Neurons contain the ER not only in the soma, but also in the dendrites, thus presenting a different case to non-neuronal cells. The ER in the dendrites has potential functions in local protein synthesis and sorting of synthesized proteins to postsynaptic membranes. It raises the possibility that ER stress could occur locally in the dendrites. Here we showed that ER stress sensors, inositol-requiring 1 (IRE1), PKR-like endoplasmic reticulum kinase (PERK), and activating transcription factor 6 (ATF6) exist in the ER of both soma and dendrites in primary mouse neurons, and that under ER stress conditions, GRP78/BiP and phosphorylated eIF2alpha are induced. Furthermore, XBP1 mRNA was localized in the proximal dendrites where IRE1 was rapidly phosphorylated in response to ER stress. These results indicate that the ER in dendrites could respond to ER stress and retain the capacity of protein quality control.
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Affiliation(s)
- T Murakami
- Division of Molecular and Cellular Biology, Department of Anatomy, Faculty of Medicine, University of Miyazaki, Kihara 5200, Kiyotake, Miyazaki 889-1692, Japan
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Sakurai S, Kota T, Isobe D, Okamoto S, Sakurai K, Ono T, Imaizumi K, Nomura S. Synchrotron Small‐Angle X‐Ray Scattering Studies on Flow‐Induced Gyroid to Cylinder Transition in an Elastomeric SBS Triblock Copolymer. J MACROMOL SCI B 2006. [DOI: 10.1081/mb-120027747] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- S. Sakurai
- a Department of Polymer Science & Engineering , Kyoto Institute of Technology , Matsugasaki, Sakyo‐ku, Kyoto , 606 8585 , Japan
| | - T. Kota
- a Department of Polymer Science & Engineering , Kyoto Institute of Technology , Matsugasaki, Sakyo‐ku, Kyoto , 606 8585 , Japan
| | - D. Isobe
- a Department of Polymer Science & Engineering , Kyoto Institute of Technology , Matsugasaki, Sakyo‐ku, Kyoto , 606 8585 , Japan
| | - S. Okamoto
- b Department of Material Science & Engineering , Nagoya Institute of Technology , Showa‐ku, Nagoya , Japan
| | - K. Sakurai
- c Department of Chemical Processes & Environments , The University of Kitakyushu , Wakamatsu‐ku, Kitakyushu , Japan
| | - T. Ono
- d Asahi‐Kasei Corporation , Kawasaki‐ku, Kawasaki , Japan
| | - K. Imaizumi
- d Asahi‐Kasei Corporation , Kawasaki‐ku, Kawasaki , Japan
| | - S. Nomura
- a Department of Polymer Science & Engineering , Kyoto Institute of Technology , Matsugasaki, Sakyo‐ku, Kyoto , 606 8585 , Japan
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Usui M, Ando M, Kitagawa C, Ando Y, Sekido Y, Imaizumi K, Shimokata K, Hasegawa Y. Genetic polymorphisms of the adenosine triphosphate-binding cassette transporters (ABCC2, ABCG2) and irinotecan toxicity in cancer patients. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.13096] [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
13096 Background: Irinotecan is subject to substantial interindividual variability in pharmacokinetic and the occurrence of unpredictably severe toxicities of leukopenia or diarrhea. These toxicities have been reported to be associated with increased levels of SN-38, the active metabolite of irinotecan. ABCC2 and ABCG2, members of adenosine triphosphate-binding cassette transporters, are involved in mediating the elimination of anionic antitumor drugs, such as SN-38 and SN-38G. Recently, Innocenti et al. reported SN-38G AUC and SN-38G/SN-38 AUC ratios were correlated with ABCC2 3972T>C. The variant ABCG2 421C>A was associated with low ABCG2 expression levels and altered sensitivity to several drugs, including SN-38, in vitro as compared with the reference-type protein. Methods: We assessed whether the variants ABCC2 3972T>C and ABCG2 421C>A would be associated with severe toxicity (leucopenia of grade 4 and/or diarrhea of grade 3 or worse) in 120 Japanese cancer patients in which 27 patients experienced severe toxicity. Results: 74 patients (62%) were homozygotes for the reference allele of ABCC2 3972T>C, 39 heterozygous (33%), and 7 homozygous (6%) for the variant, whereas 62 patients (52%) were homozygous for the reference allele of ABCG2 421C>A, 48 heterozygous (40%) and 10 homozygous (8%) for the variant. Logistic regression analysis did not show any significant associations between the occurrence of severe toxicity and carrying these variants (see Table ). Conclusions: It suggests that genotyping of ABCC2 3972T>C and ABCG2 421C>A would not be useful for predicting severe toxicity caused by irinotecan. [Table: see text] No significant financial relationships to disclose.
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Affiliation(s)
- M. Usui
- Nagoya University Graduate School of Medicine, Nagoya, Japan; Aichi Cancer Center, Nagoya, Japan
| | - M. Ando
- Nagoya University Graduate School of Medicine, Nagoya, Japan; Aichi Cancer Center, Nagoya, Japan
| | - C. Kitagawa
- Nagoya University Graduate School of Medicine, Nagoya, Japan; Aichi Cancer Center, Nagoya, Japan
| | - Y. Ando
- Nagoya University Graduate School of Medicine, Nagoya, Japan; Aichi Cancer Center, Nagoya, Japan
| | - Y. Sekido
- Nagoya University Graduate School of Medicine, Nagoya, Japan; Aichi Cancer Center, Nagoya, Japan
| | - K. Imaizumi
- Nagoya University Graduate School of Medicine, Nagoya, Japan; Aichi Cancer Center, Nagoya, Japan
| | - K. Shimokata
- Nagoya University Graduate School of Medicine, Nagoya, Japan; Aichi Cancer Center, Nagoya, Japan
| | - Y. Hasegawa
- Nagoya University Graduate School of Medicine, Nagoya, Japan; Aichi Cancer Center, Nagoya, Japan
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Suzuki R, Hasegawa Y, Baba K, Saka H, Saito H, Taniguchi H, Yamamoto M, Matsumoto S, Kato K, Oishi T, Imaizumi K, Shimokata K. A phase II study of single-agent gefitinib as first-line therapy in patients with stage IV non-small-cell lung cancer. Br J Cancer 2006; 94:1599-603. [PMID: 16670714 PMCID: PMC2361326 DOI: 10.1038/sj.bjc.6603159] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2006] [Revised: 04/06/2006] [Accepted: 04/06/2006] [Indexed: 01/14/2023] Open
Abstract
The aim of this study was to evaluate the efficacy and tolerability of gefitinib ('IRESSA') in Japanese patients with previously untreated stage IV non-small-cell lung cancer (NSCLC). This was a multi-institutional phase II study. Thirty-four patients with previously untreated stage IV NSCLC were enrolled between May 2003 and September 2004. Gefitinib was administered orally 250 mg once a day and was continued until there was either disease progression or severe toxicity. Objective tumour response rate was 26.5% (95% confidence interval, 11.7-41.3%). Adverse events were generally mild (National Cancer Institute-Common Toxicity Criteria grade 1 or 2) and consisted mainly of skin rash, fatigue and liver dysfunction. No pulmonary toxicity was observed. The global health status revealed that there was no change in quality of life during the study. This study found that single-agent gefitinib is active and well tolerated in chemo-naive Japanese patients with advanced NSCLC.
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Affiliation(s)
- R Suzuki
- Toyohashi Municipal Hospital, 50 Hachiken-nishi, Aotake, Toyohashi, Aichi 441-8570, Japan.
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Salem ML, Zommara M, Imaizumi K. Dietary supplementation with Cyperus esculentus L (tiger nut) tubers attenuated atherosclerotic lesion in apolipoprotein E knockout mouse associated with inhibition of inflammatory cell responses. ACTA ACUST UNITED AC 2005. [DOI: 10.3844/ajisp.2005.60.67] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Kimura J, Tachibana K, Imaizumi K, Kurosawa K, Kuroki Y. Longitudinal growth and height velocity of Japanese children with Down's syndrome. Acta Paediatr 2004; 92:1039-42. [PMID: 14599066 DOI: 10.1080/08035250310004306] [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] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 09/30/2022]
Abstract
AIM To determine the natural growth pattern of Japanese children with Down's syndrome. METHODS Longitudinal height data of 85 patients (43 males, 42 females) from birth to final height were analyzed. Based on these data, semi-longitudinal standard growth curves and height velocity curves for Down's syndrome were drawn. RESULTS The means +/- SD of final height of males and females with Down's syndrome were 153.2 +/- 5.6 and 141.9 +/- 4.2 cm, respectively. They were -3.0 SD and -2.8 SD for Japanese standards. Mean peak height velocities were 8.9 and 7.5 cm y(-1), and the ages at peak height velocity were 11.6 and 10.2 y for males and females, respectively. CONCLUSION The mean height of patients with Down's syndrome was around -2 SD for normal children before puberty. Their pubertal growth spurt starts about 1 y earlier and their peak height velocity was about 1.3-1.4 cm shorter than for normal children.
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Affiliation(s)
- J Kimura
- Division of Medical Genetics, Kanagawa Children's Medical Center, Yokohama, Japan
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Abstract
Combined physiological and connectional studies show significant non-topographic extrinsic projections to frequency-specific domains in the cat auditory cortex. These frequency-mismatched loci in the thalamus, ipsilateral cortex, and commissural system complement the predicted topographic and tonotopic projections. Two tonotopic areas, the primary auditory cortex (AI) and the anterior auditory field (AAF), were electrophysiologically characterized by their frequency organization. Next, either cholera toxin beta subunit or cholera toxin beta subunit gold conjugate was injected into frequency-matched locations in each area to reveal the projection pattern from the thalamus and cortex. Most retrograde labeling was found at tonotopically appropriate locations within a 1 mm-wide strip in the thalamus and a 2-3 mm-wide expanse of cortex (approximately 85%). However, approximately 13-30% of the neurons originated from frequency-mismatched locations far from their predicted positions in thalamic nuclei and cortical areas, respectively. We propose that these heterotopic projections satisfy at least three criteria that may be necessary to support the magnitude and character of plastic changes in physiological studies. First, they are found in the thalamus, ipsilateral and commissural cortex; since this reorganization could arise from any of these routes and may involve each, such projections ought to occur in them. Second, they originate from nuclei and areas with or without tonotopy; it is likely that plasticity is not exclusively shaped by spectral influences and not limited to cochleotopic regions. Finally, the projections are appropriate in magnitude and sign to plausibly support such rearrangements; given the rapidity of some aspects of plastic changes, they should be mediated by substantial existing connections. Alternative roles for these heterotopic projections are also considered.
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Affiliation(s)
- C C Lee
- Division of Neurobiology, Department of Molecular and Cell Biology, Room 285 Life Sciences Addition, University of California at Berkeley, Berkeley, CA 94720-3200, USA.
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Imaizumi K, Ono T, Kota T, Okamoto S, Sakurai S. Transformation of cubic symmetry for spherical microdomains from face-centred to body-centred cubic upon uniaxial elongation in an elastomeric triblock copolymer. J Appl Crystallogr 2003. [DOI: 10.1107/s0021889803008471] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Experimental observation of the transformation of cubic symmetry from face-centred cubic (f.c.c.) to body-centred cubic (b.c.c.) for spherical microdomains upon uniaxial stretching of poly(1,3-cyclohexadiene)-block-poly(ethylene-co-but-1-ene)-block-poly(1,3-cyclohexadiene) triblock copolymer, having φPCHD= 0.293,Mn= 5.73 × 104,Mw/Mn= 1.09, is reported. First, the sample was subjected to flow treatment at 493 K for 2 h; then it was annealed at 473 K for 2 h to prepare the f.c.c. structure. The sample was subsequently subjected to uniaxial stretching. After the load was completely removed, small-angle X-ray scattering measurements were conducted. It was found that the f.c.c. packing was transformed to the well ordered b.c.c. packing upon uniaxial stretching.
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Manabe T, Katayama T, Sato N, Gomi F, Hitomi J, Yanagita T, Kudo T, Honda A, Mori Y, Matsuzaki S, Imaizumi K, Mayeda A, Tohyama M. Induced HMGA1a expression causes aberrant splicing of Presenilin-2 pre-mRNA in sporadic Alzheimer's disease. Cell Death Differ 2003; 10:698-708. [PMID: 12761578 DOI: 10.1038/sj.cdd.4401221] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
The aberrant splicing isoform (PS2V), generated by exon 5 skipping of the Presenilin-2 (PS2) gene transcript, is a diagnostic feature of sporadic Alzheimer's disease (AD). We found PS2V is hypoxia-inducible in human neuroblastoma SK-N-SH cells. We purified a responsible trans-acting factor based on its binding to an exon 5 fragment. The factor was identified as the high mobility group A1a protein (HMGA1a; formerly HMG-I). HMGA1a bound to a specific sequence on exon 5, located upstream of the 5' splice site. HMGA1a expression was induced by hypoxia and the protein was accumulated in the nuclear speckles with the endogenous splicing factor SC35. Overexpression of HMGA1a generated PS2V, but PS2V was repressed by cotransfection with the U1 snRNP 70K protein that has a strong affinity to HMGA1a. HMGA1a could interfere with U1 snRNP binding to the 5' splice site and caused exon 5 skipping. HMGA1a levels were significantly increased in the brain tissue from sporadic AD patients. We propose a novel mechanism of sporadic AD that involves HMGA1a-induced aberrant splicing of PS2 pre-mRNA in the absence of any mutations.
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Affiliation(s)
- T Manabe
- Department of Anatomy and Neuroscience, Graduate School of Medicine, Osaka University, Suita, Japan
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40
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Nagai T, Matsumoto N, Kurotaki N, Harada N, Niikawa N, Ogata T, Imaizumi K, Kurosawa K, Kondoh T, Ohashi H, Tsukahara M, Makita Y, Sugimoto T, Sonoda T, Yokoyama T, Uetake K, Sakazume S, Fukushima Y, Naritomi K. Sotos syndrome and haploinsufficiency of NSD1: clinical features of intragenic mutations and submicroscopic deletions. J Med Genet 2003; 40:285-9. [PMID: 12676901 PMCID: PMC1735419 DOI: 10.1136/jmg.40.4.285] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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41
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Iwamoto M, Imaizumi K, Sato M, Hirooka Y, Sakai K, Takeshita A, Kono M. Serum lipid profiles in Japanese women and men during consumption of walnuts. Eur J Clin Nutr 2002; 56:629-37. [PMID: 12080402 DOI: 10.1038/sj.ejcn.1601400] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2001] [Revised: 11/30/2001] [Accepted: 12/03/2001] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To determine the serum cholesterol, apolipoproteins and LDL oxidizability in young Japanese women and men during walnut consumption and to evaluate its active principle. DESIGN Experimental study with a randomized design. SUBJECTS Twenty healthy women and 20 healthy men. INTERVENTIONS Subjects were randomly assigned to consume each of two mixed natural diets for 4 weeks in a cross-over design. Reference and walnut diets were designed and the walnut diet had 12.5% of the energy derived from walnuts (44-58 g/day). RESULTS The total cholesterol and serum apolipoprotein B concentrations, and the ratio of LDL cholesterol to HDL cholesterol was significantly lowered in women and men when fed on the walnut diet, than when on the reference diet (P<or=0.05). The LDL cholesterol concentration was significantly lowered in women on the walnut diet (0.22 mmol/l, P=0.0008), whereas this decrease was not significant in men (0.18 mmol/l, P=0.078). The most prominent change in the fatty acid composition of the cholesteryl esters from serum after the walnut diet was an elevation of alpha-linolenic acid in women (76%, P<0.001) and men (107%, P<0.001). This elevation was negatively correlated to the change in LDL cholesterol in women (r=0.496, P=0.019) and men (r=0.326, P=0.138). The LDL oxidizability in women was not influenced by the diets (P=0.19). CONCLUSIONS alpha-Linolenic acid in the walnut diet appears to be responsible for the lowering of LDL cholesterol in women. SPONSORSHIP Kyushu University (Fukuoka, Japan) and the California Walnut Commission (California, USA).
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Affiliation(s)
- M Iwamoto
- Laboratory of Nutrition Chemistry, Division of Bioresource and Bioenvironmental Sciences, Graduate School, Kyushu University, Fukuoka, Japan
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42
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Sato M, Adan Y, Shibata K, Shoji Y, Sato H, Imaizumi K. Cloning of rat delta 6-desaturase and its regulation by dietary eicosapentaenoic or docosahexaenoic acid. World Rev Nutr Diet 2002; 88:196-9. [PMID: 11935956 DOI: 10.1159/000059780] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Affiliation(s)
- M Sato
- Laboratory of Nutrition Chemistry, Division of Bioresource and Bioenvironmental Sciences, Graduate School, Kyushu University, Fukuoka, Japan
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43
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Imaizumi K, Parsons TJ, Yoshino M, Holland MM. A new database of mitochondrial DNA hypervariable regions I and II sequences from 162 Japanese individuals. Int J Legal Med 2002; 116:68-73. [PMID: 12056523 DOI: 10.1007/s004140100211] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.7] [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: 11/25/2022]
Abstract
A database of mitochondrial DNA (mtDNA) hypervariable region 1 (HV1) and region 2 (HV2) sequences of the mtDNA control region was established from 162 unrelated Japanese individuals. The random match probability and the genetic diversity for this database were 0.96% and 0.997, respectively. Length heteroplasmy in the C-stretch regions located around position 16189 in HVI and 310 in HV2 was observed in 37% and 38% of the samples, respectively. A strategy using internal sequencing primers was devised to obtain confirmed sequences in these length heteroplasmic individuals. This database, combined with other mtDNA sequence databases from the Japanese population, will permit the significance of mtDNA match results to be properly reported in mtDNA typing casework in Japan.
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Affiliation(s)
- K Imaizumi
- National Research Institute of Police Science, Kashiwa, Chiba, Japan.
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44
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Imaizumi K. [Toriello-Carey syndrome]. Ryoikibetsu Shokogun Shirizu 2002:737-8. [PMID: 11528996] [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] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Affiliation(s)
- K Imaizumi
- Division of Medical Genetics, Kanagawa Children's Medical Center
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45
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Imaizumi K. [Neonatal Marfan syndrome]. Ryoikibetsu Shokogun Shirizu 2002:277-8. [PMID: 11528738] [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] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Affiliation(s)
- K Imaizumi
- Division of Medical Genetics, Kanagawa Children's Medical Center
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46
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Imaizumi K. [Gollop-Wolfgang syndrome]. Ryoikibetsu Shokogun Shirizu 2002:732-3. [PMID: 11528993] [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] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Affiliation(s)
- K Imaizumi
- Division of Medical Genetics, Kanagawa Children's Medical Center
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47
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Kobayashi S, Uemura H, Kohda T, Nagai T, Chinen Y, Naritomi K, Kinoshita EI, Ohashi H, Imaizumi K, Tsukahara M, Sugio Y, Tonoki H, Kishino T, Tanaka T, Yamada M, Tsutsumi O, Niikawa N, Kaneko-Ishino T, Ishino F. No evidence of PEG1/MEST gene mutations in Silver-Russell syndrome patients. Am J Med Genet 2001; 104:225-31. [PMID: 11754049] [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: 04/17/2023]
Abstract
Silver-Russell syndrome (SRS) is characterized by prenatal and postnatal growth retardation with morphologic anomalies. Maternal uniparental disomy 7 has been reported in some SRS patients. PEG1/MEST is an imprinted gene on chromosome 7q32 that is expressed only from the paternal allele and is a candidate gene for SRS. To clarify its biological function and role in SRS, we screened PEG1/MEST abnormalities in 15 SRS patients from various standpoints. In the lymphocytes of SRS patients, no aberrant expression patterns of two splice variants (alpha and beta) of PEG1/MEST were detected when they were compared with normal samples. Direct sequence analysis failed to detect any mutations in the PEG1/MEST alpha coding region, and there were no significant mutations in the 5'-flanking upstream region containing the predicted promoter and the highly conserved human/mouse genomic region. Differential methylation patterns of the CpG island for PEG1/MEST alpha were normally maintained and resulted in the same pattern as in the normal control, suggesting that there was no loss of imprinting. These findings suggest that PEG1/MEST can be excluded as a major determinant of SRS.
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Affiliation(s)
- S Kobayashi
- Gene Research Center, Tokyo Institute of Technology, 4259 Nagatsuka-cho, Midori-ku, Yokohama 226-8501, Japan
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48
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Katayama T, Imaizumi K, Honda A, Yoneda T, Kudo T, Takeda M, Mori K, Rozmahel R, Fraser P, George-Hyslop PS, Tohyama M. Disturbed activation of endoplasmic reticulum stress transducers by familial Alzheimer's disease-linked presenilin-1 mutations. J Biol Chem 2001; 276:43446-54. [PMID: 11551913 DOI: 10.1074/jbc.m104096200] [Citation(s) in RCA: 143] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Recent studies have shown independently that presenilin-1 (PS1) null mutants and familial Alzheimer's disease (FAD)-linked mutants should both down-regulate signaling of the unfolded protein response (UPR). However, it is difficult to accept that both mutants possess the same effects on the UPR. Furthermore, contrary to these observations, neither loss of PS1 and PS2 function nor expression of FAD-linked PS1 mutants were reported to have a discernable impact on the UPR. Therefore, re-examination and detailed analyses are needed to clarify the relationship between PS1 function and UPR signaling. Here, we report that PS1/PS2 null and dominant negative PS1 mutants, which are mutated at aspartate residue 257 or 385, did not affect signaling of the UPR. In contrast, FAD-linked PS1 mutants were confirmed to disturb UPR signaling by inhibiting activation of both Ire1alpha and ATF6, both of which are endoplasmic reticulum (ER) stress transducers in the UPR. Furthermore, PS1 mutants also disturbed activation of PERK (PKR-like ER kinase), which plays a crucial role in inhibiting translation during ER stress. Taken together, these observations suggested that PS1 mutations could affect signaling pathways controlled by each of the respective ER-stress transducers, possibly through a gain-of-function.
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Affiliation(s)
- T Katayama
- Department of Anatomy and Neuroscience, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
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49
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Shinoe T, Wanaka A, Nikaido T, Kanazawa K, Shimizu J, Imaizumi K, Kanazawa I. Upregulation of the pro-apoptotic BH3-only peptide harakiri in spinal neurons of amyotrophic lateral sclerosis patients. Neurosci Lett 2001; 313:153-7. [PMID: 11682150 DOI: 10.1016/s0304-3940(01)02250-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
DNA fragmentation and activation of caspase-1, implicating involvement of apoptosis, have been reported in the spinal cord of amyotrophic lateral sclerosis (ALS) patients and transgenic mouse models of ALS. Because BH3-only members of the Bcl-2 family have pro-apoptotic activity, we examined the expression of the BH3-only peptide harakiri (Hrk) in the spinal cord of ALS patients. In situ expression of Hrk mRNA and immunoreactivity against the Hrk peptide were verified in the spinal neurons. In the immunoblot analysis, upregulated Hrk protein migrated at 16 kDa. Heterodimerization of Hrk with Bcl-2 was detected by immunoprecipitation, which suggests the competition of Hrk and anti-apoptotic Bcl-2. These findings suggest that Hrk plays a role in apoptotic events in ALS pathogenesis.
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Affiliation(s)
- T Shinoe
- Department of Neurology, Division of Neuroscience, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8655, Tokyo, Japan.
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50
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Kusaba-Nakayama M, Ki M, Kawada E, Sato M, Ikeda I, Mochizuki T, Imaizumi K. Intestinal absorbability of wheat allergens, subunits of a wheat alpha-amylase inhibitor, expressed by bacteria. Biosci Biotechnol Biochem 2001; 65:2448-55. [PMID: 11791718 DOI: 10.1271/bbb.65.2448] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Wheat CM2, CM3 and CM16 proteins are known as subunits of the tetrameric alpha-amylase inhibitor as well as major allergens to baker's asthma. The purpose of this study is to produce these CM proteins by bacteria in a quantity adequate for studying the penetration characteristics of the CM proteins through intestinal mucosa in rats and Caco-2 cells. cDNAs encoding the mature proteins were expressed in Escherichia coli and purified by an Ni2+-chelating column. The recombinant proteins were radioiodinated and admministered orally to rats or applied to the apical site of the Caco-2 cell monolayer. The radioactivity in the trichloroacetic acid-insoluble fraction, which was mainly composed of peptides with molecular mass less than that of the intact CM proteins, in the serum and the basolateral medium was highest in recombinant CM3. Accordingly, the intestinal absorption of these three proteins in the form present in wheat should be evaluated.
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Affiliation(s)
- M Kusaba-Nakayama
- Division of Bioresource and Bioenvironmental Sciences, Graduate School, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
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