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Matsumura R, Kobayashi D, Faizah AN, Sasaki T, Itoyama K, Isawa H. Screening and identification of persistent viruses in cell lines derived from medically important arthropods. J Med Entomol 2024:tjae011. [PMID: 38417093 DOI: 10.1093/jme/tjae011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 01/14/2024] [Accepted: 01/29/2024] [Indexed: 03/01/2024]
Abstract
Arthropod-derived cell lines serve as crucial tools for studying arthropod-borne viruses (arboviruses). However, it has recently come to light that certain cell lines harbor persistent infections of arthropod-specific viruses, which do not cause any apparent cytopathic effects. Moreover, some of these persistent viral infections either inhibit or promote the growth of arboviruses. Therefore, it is of utmost importance to identify the presence of such persistent viruses and understand their impact on arboviral infections. In this study, we conducted a comprehensive virome analysis of several arthropod-derived cell lines, including mosquito-derived NIID-CTR, Ar-3, MSQ43, NIAS-AeAl-2, CCL-126 cells, and tick-derived IDE8 cells, along with flesh fly-derived NIH-Sape-4 cells. The aim was to determine if these cells were infected with persistent viruses. The results revealed the presence of 15 persistent viruses in NIID-CTR, Ar-3, MSQ43, NIAS-AeAl-2, and IDE8 cells. Among these, 11 were already known arthropod-specific viruses, while the remaining 4 were novel viruses belonging to Orthophasmavirus, Rhabdoviridae, Totiviridae, and Bunyavirales. In contrast, CCL-126 and NIH-Sape-4 cells appeared to be free of viral infections. This study provides valuable insights into the diversity and latency of arthropod-specific viruses within arthropod-derived cell lines. Further investigations are required to explore persistent viral infections in other arthropod-derived cell cultures and their effects on arbovirus replication. Understanding these factors will enhance the accuracy and reliability of experimental data obtained using these cell lines.
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Affiliation(s)
- Ryo Matsumura
- Graduate School of Agriculture, Meiji University, Kasawaki-shi, Kanagawa, Japan
- Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Daisuke Kobayashi
- Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
- Management Department of Biosafety, Laboratory Animal, and Pathogen Bank, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Astri Nur Faizah
- Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Toshinori Sasaki
- Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Kyo Itoyama
- Graduate School of Agriculture, Meiji University, Kasawaki-shi, Kanagawa, Japan
| | - Haruhiko Isawa
- Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
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Matsumura R, Kobayashi D, Itoyama K, Isawa H. First detection of the Jingmen tick virus in Amblyomma testudinarium ticks from the Kanto district, Japan. Jpn J Infect Dis 2023:JJID.2023.347. [PMID: 38171848 DOI: 10.7883/yoken.jjid.2023.347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
In 2010, the Jingmen tick virus (JMTV) was discovered in ticks in China and has been shown to be distributed in several regions worldwide. Recently, cases of JMTV infection in humans have been reported in China and Kosovo, attracting much attention as an emerging tick-borne disease. In this study, we detected the JMTV genome in Amblyomma testudinarium ticks collected in Kanagawa Prefecture, Japan, during tick-borne virus surveillance conducted in the Kanto district. Phylogenetic analysis revealed that the new JMTV strain is closely related to previous strains detected in Japan. This suggests that JMTV may have been maintained during an independent natural transmission cycle in Japan. In addition, unlike in other countries and regions, all JMTV strains in Japan were detected only in A. testudinarium ticks, suggesting that this tick species is the primary JMTV vector in Japan. This report is the first to detect JMTV in the Kanto region. Further studies are required to elucidate the potential risk of infection by this tick-borne virus in Japan. In particular, the prevalence of JMTV in wild animals should be examined to clarify its geographical distribution, host range, and transmission cycle in nature.
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Affiliation(s)
- Ryo Matsumura
- Graduate School of Agriculture, Meiji University, Japan
- Department of Medical Entomology, National Institute of Infectious Diseases, Japan
| | - Daisuke Kobayashi
- Department of Medical Entomology, National Institute of Infectious Diseases, Japan
- Management Department of Biosafety, Laboratory Animal, and Pathogen Bank, National Institute of Infectious Diseases, Japan
| | - Kyo Itoyama
- Graduate School of Agriculture, Meiji University, Japan
| | - Haruhiko Isawa
- Department of Medical Entomology, National Institute of Infectious Diseases, Japan
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Kawai Y, Watanabe Y, Omae Y, Miyahara R, Khor SS, Noiri E, Kitajima K, Shimanuki H, Gatanaga H, Hata K, Hattori K, Iida A, Ishibashi-Ueda H, Kaname T, Kanto T, Matsumura R, Miyo K, Noguchi M, Ozaki K, Sugiyama M, Takahashi A, Tokuda H, Tomita T, Umezawa A, Watanabe H, Yoshida S, Goto YI, Maruoka Y, Matsubara Y, Niida S, Mizokami M, Tokunaga K. Exploring the genetic diversity of the Japanese population: Insights from a large-scale whole genome sequencing analysis. PLoS Genet 2023; 19:e1010625. [PMID: 38060463 PMCID: PMC10703243 DOI: 10.1371/journal.pgen.1010625] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Accepted: 10/24/2023] [Indexed: 12/18/2023] Open
Abstract
The Japanese archipelago is a terminal location for human migration, and the contemporary Japanese people represent a unique population whose genomic diversity has been shaped by multiple migrations from Eurasia. We analyzed the genomic characteristics that define the genetic makeup of the modern Japanese population from a population genetics perspective from the genomic data of 9,287 samples obtained by high-coverage whole-genome sequencing (WGS) by the National Center Biobank Network. The dataset comprised populations from the Ryukyu Islands and other parts of the Japanese archipelago (Hondo). The Hondo population underwent two episodes of population decline during the Jomon period, corresponding to the Late Neolithic, and the Edo period, corresponding to the Early Modern era, while the Ryukyu population experienced a population decline during the shell midden period of the Late Neolithic in this region. Haplotype analysis suggested increased allele frequencies for genes related to alcohol and fatty acid metabolism, which were reported as loci that had experienced positive natural selection. Two genes related to alcohol metabolism were found to be 12,500 years out of phase with the time when they began to increase in the allele frequency; this finding indicates that the genomic diversity of Japanese people has been shaped by events closely related to agriculture and food production.
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Affiliation(s)
- Yosuke Kawai
- Genome Medical Science Project, Research Institute, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, Japan
| | - Yusuke Watanabe
- Genome Medical Science Project, Research Institute, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, Japan
| | - Yosuke Omae
- Genome Medical Science Project, Research Institute, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, Japan
- Central Biobank, National Center Biobank Network, Shinjuku-ku, Tokyo, Japan
| | - Reiko Miyahara
- Central Biobank, National Center Biobank Network, Shinjuku-ku, Tokyo, Japan
| | - Seik-Soon Khor
- Genome Medical Science Project, Research Institute, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, Japan
| | - Eisei Noiri
- Central Biobank, National Center Biobank Network, Shinjuku-ku, Tokyo, Japan
| | - Koji Kitajima
- Central Biobank, National Center Biobank Network, Shinjuku-ku, Tokyo, Japan
- Department of Data Science Center for Clinical Sciences, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, Japan
| | - Hideyuki Shimanuki
- Central Biobank, National Center Biobank Network, Shinjuku-ku, Tokyo, Japan
- Department of Data Science Center for Clinical Sciences, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, Japan
| | - Hiroyuki Gatanaga
- AIDS Clinical Center, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, Japan
| | - Kenichiro Hata
- Department of Maternal-Fetal Biology, National Center for Child Health and Development, Setagaya-ku, Tokyo, Japan
| | - Kotaro Hattori
- Department of Bioresources, Medical Genome Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Aritoshi Iida
- Department of Clinical Genome Analysis, Medical Genome Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | | | - Tadashi Kaname
- Department of Genome Medicine, National Center for Child Health and Development, Setagaya-ku, Tokyo, Japan
| | - Tatsuya Kanto
- Department of Liver Disease, Research Center for Hepatitis and Immunology, National Center for Global Health and Medicine, Ichikawa, Chiba, Japan
| | - Ryo Matsumura
- Department of Bioresources, Medical Genome Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Kengo Miyo
- Center for Medical Informatics Intelligence, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, Japan
| | - Michio Noguchi
- NCVC Biobank, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Kouichi Ozaki
- Medical Genome Center, Research Institute, National Center for Geriatrics and Gerontology, Obu, Aichi, Japan
- RIKEN Center for Integrative Medical Sciences, Yokohama, Kanagawa, Japan
| | - Masaya Sugiyama
- Department of Viral Pathogenesis and Controls, Research Institute, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, Japan
| | - Ayako Takahashi
- NCVC Biobank, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Haruhiko Tokuda
- Core Facility Administration, Research Institute, National Center for Geriatrics and Gerontology, Obu, Aichi, Japan
- Department of Metabolic Research, Research Institute, National Center for Geriatrics and Gerontology, Obu, Aichi, Japan
- Department of Clinical Laboratory, Hospital, National Center for Geriatrics and Gerontology, Obu, Aichi, Japan
| | - Tsutomu Tomita
- NCVC Biobank, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Akihiro Umezawa
- Center for Regenerative Medicine, Research Institute, National Center for Child Health and Development, Setagaya-ku, Tokyo, Japan
| | - Hiroshi Watanabe
- Core Facility Administration, Research Institute, National Center for Geriatrics and Gerontology, Obu, Aichi, Japan
- Innovation Center for Translational Research, Hospital, National Center for Geriatrics and Gerontology, Obu, Aichi, Japan
| | - Sumiko Yoshida
- Department of Bioresources, Medical Genome Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Yu-ichi Goto
- Medical Genome Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Yutaka Maruoka
- Department of Oral and Maxillofacial Surgery, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, Japan
| | - Yoichi Matsubara
- National Center for Child Health and Development, Setagaya-ku, Tokyo, Japan
| | - Shumpei Niida
- Core Facility Administration, Research Institute, National Center for Geriatrics and Gerontology, Obu, Aichi, Japan
| | - Masashi Mizokami
- Genome Medical Science Project, Research Institute, National Center for Global Health and Medicine, Ichikawa, Chiba, Japan
| | - Katsushi Tokunaga
- Genome Medical Science Project, Research Institute, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, Japan
- Central Biobank, National Center Biobank Network, Shinjuku-ku, Tokyo, Japan
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Yamada R, Fujii T, Hattori K, Hori H, Matsumura R, Kurashimo T, Ishihara N, Yoshida S, Sumiyoshi T, Kunugi H. Discrepancy between Clinician-rated and Self-reported Depression Severity is Associated with Adverse Childhood Experience, Autistic-like Traits, and Coping Styles in Mood Disorders. Clin Psychopharmacol Neurosci 2023; 21:296-303. [PMID: 37119222 PMCID: PMC10157014 DOI: 10.9758/cpn.2023.21.2.296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 02/10/2022] [Accepted: 02/11/2022] [Indexed: 05/01/2023]
Abstract
Objective This study aimed to determine if the discrepancy between depression severity rated by clinicians and that reported by patients depends on key behavioral/psychological features in patients with mood disorders. Methods Participants included 100 patients with mood disorders. First, we examined correlations and regressions between scores on the Hamilton Depression Rating Scale (HAMD) and Beck Depression Inventory (BDI). Second, we divided the participants into those who provided 1) greater ratings for the BDI compared with the HAMD (BDI relative- overrating, BO) group, 2) comparable ratings for the BDI and HAMD (BDI relatively concordant, BC) group, or 3) less ratings for the BDI (BDI relative-underrating, BU) group. Adverse childhood experiences, autistic-like traits, and coping styles were evaluated with a six-item short version of the Childhood Trauma Questionnaire (CTQ-6), the Social Responsiveness Scale for Adults (SRS-A), and the Ways of Coping Checklist (WCCL), respectively. Results A significant correlation was found between HAMD and BDI scores. Total and emotional abuse subscale scores from the CTQ-6, and the self-blame subscale scores from the WCCL were significantly higher for the BO group compared with the BU group. The BO group also elicited significantly higher SRS-A total scores than did the other groups. Conclusion These findings suggest that patients with adverse emotional experiences, autistic-like traits, and self-blame coping styles perceive greater distress than that evaluated objectively by clinicians. The results indicate the need for inclusion of subjective assessments to effectively evaluate depressive symptoms in patients deemed to have these psycho- behavioral concerns.
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Affiliation(s)
- Risa Yamada
- Department of Preventive Intervention for Psychiatric Disorders, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan
- Department of Psychiatry, National Center Hospital of Neurology and Psychiatry, Tokyo, Japan
- Department of Psychiatry, Jikei University School of Medicine, Tokyo, Japan
| | - Takeshi Fujii
- Department of Psychiatry, National Center Hospital of Neurology and Psychiatry, Tokyo, Japan
- Mood Disorder Center for Advanced Therapy, National Center Hospital of Neurology and Psychiatry, Tokyo, Japan
| | - Kotaro Hattori
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, Japan
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Hiroaki Hori
- Department of Behavioral Medicine, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Ryo Matsumura
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Tomoko Kurashimo
- Mood Disorder Center for Advanced Therapy, National Center Hospital of Neurology and Psychiatry, Tokyo, Japan
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Naoko Ishihara
- Mood Disorder Center for Advanced Therapy, National Center Hospital of Neurology and Psychiatry, Tokyo, Japan
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Sumiko Yoshida
- Mood Disorder Center for Advanced Therapy, National Center Hospital of Neurology and Psychiatry, Tokyo, Japan
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, Japan
- Department of Psychiatric Rehabilitation, National Center Hospital of Neurology and Psychiatry, Tokyo, Japan
| | - Tomiki Sumiyoshi
- Department of Preventive Intervention for Psychiatric Disorders, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan
- Department of Psychiatry, National Center Hospital of Neurology and Psychiatry, Tokyo, Japan
- Mood Disorder Center for Advanced Therapy, National Center Hospital of Neurology and Psychiatry, Tokyo, Japan
| | - Hiroshi Kunugi
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, Japan
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
- Department of Psychiatry, Teikyo University School of Medicine, Tokyo, Japan
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Faizah AN, Kobayashi D, Matsumura R, Watanabe M, Higa Y, Sawabe K, Isawa H. Blood meal source identification and RNA virome determination in Japanese encephalitis virus vectors collected in Ishikawa Prefecture, Japan, show distinct avian/mammalian host preference. J Med Entomol 2023; 60:620-628. [PMID: 37027507 DOI: 10.1093/jme/tjad028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 02/23/2023] [Accepted: 03/06/2023] [Indexed: 05/13/2023]
Abstract
In Asia, Culex mosquitoes are of particular interest because of their role in maintaining endemic mosquito-borne viral diseases, including the Japanese encephalitis virus (JEV). Nonetheless, host-feeding preferences, along with naturally infecting RNA viruses in certain Culex species, remain understudied. In this study, selected blood-fed mosquitoes were processed for avian and mammalian blood meal source identification. Concurrently, cell culture propagation and high-throughput sequencing (HTS) approaches were used to determine the RNA virome of Culex mosquitoes collected in Ishikawa Prefecture, Japan. The identification of blood meal sources from wild-caught Culex spp. revealed that Culex (Culex) tritaeniorhynchus Giles, 1901, has a robust preference toward wild boar (62%, 26/42), followed by heron (21%, 9/42). The other two species, Culex (Oculeomyia) bitaeniorhynchus Giles, 1901, and Culex (Culex) orientalis Edwards, 1921, showed a distinct preference for avian species, including migratory birds. From the HTS results, 34 virus sequences were detected, four of which were newly identified virus sequences of unclassified Aspiviridae, Qinviridae, Iflaviridae, and Picornaviridae. The absence of observable cytopathic effects in mammalian cells and phylogenetic analysis suggested that all identified virus sequences were insect-specific. Further investigations involving other mosquito populations collected in different areas are warranted to explore previously unknown vertebrate hosts that may be linked to JEV dispersal in nature.
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Affiliation(s)
- Astri Nur Faizah
- Department of Medical Entomology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
| | - Daisuke Kobayashi
- Department of Medical Entomology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
| | - Ryo Matsumura
- Department of Medical Entomology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
| | - Mamoru Watanabe
- Department of Medical Entomology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
| | - Yukiko Higa
- Department of Medical Entomology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
| | - Kyoko Sawabe
- Department of Medical Entomology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
| | - Haruhiko Isawa
- Department of Medical Entomology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
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Azerigyik FA, Faizah AN, Kobayashi D, Amoa-Bosompem M, Matsumura R, Kai I, Sasaki T, Higa Y, Isawa H, Iwanaga S, Ishino T. Evaluating the mosquito host range of Getah virus and the vector competence of selected medically important mosquitoes in Getah virus transmission. Parasit Vectors 2023; 16:99. [PMID: 36922882 PMCID: PMC10015795 DOI: 10.1186/s13071-023-05713-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 02/22/2023] [Indexed: 03/17/2023] Open
Abstract
BACKGROUND The Getah virus (GETV) is a mosquito-borne Alphavirus (family Togaviridae) that is of significant importance in veterinary medicine. It has been associated with major polyarthritis outbreaks in animals, but there are insufficient data on its clinical symptoms in humans. Serological evidence of GETV exposure and the risk of zoonotic transmission makes GETV a potentially medically relevant arbovirus. However, minimal emphasis has been placed on investigating GETV vector transmission, which limits current knowledge of the factors facilitating the spread and outbreaks of GETV. METHODS To examine the range of the mosquito hosts of GETV, we selected medically important mosquitoes, assessed them in vitro and in vivo and determined their relative competence in virus transmission. The susceptibility and growth kinetics of GETVs in various mosquito-derived cell lines were also determined and quantified using plaque assays. Vector competency assays were also conducted, and quantitative reverse transcription-PCR and plaque assays were used to determine the susceptibility and transmission capacity of each mosquito species evaluated in this study. RESULTS GETV infection in all of the investigated mosquito cell lines resulted in detectable cytopathic effects. GETV reproduced the fastest in Culex tritaeniorhynchus- and Aedes albopictus-derived cell lines, as evidenced by the highest exponential titers we observed. Regarding viral RNA copy numbers, mosquito susceptibility to infection, spread, and transmission varied significantly between species. The highest vector competency indices for infection, dissemination and transmission were obtained for Cx. tritaeniorhynchus. This is the first study to investigate the ability of Ae. albopictus and Anopheles stephensi to transmit GETV, and the results emphasize the role and capacity of other mosquito species to transmit GETV upon exposure to GETV, in addition to the perceived vectors from which GETV has been isolated in nature. CONCLUSIONS This study highlights the importance of GETV vector competency studies to determine all possible transmission vectors, especially in endemic regions.
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Affiliation(s)
- Faustus Akankperiwen Azerigyik
- Department of Parasitology and Tropical Medicine, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan.,Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Astri Nur Faizah
- Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Daisuke Kobayashi
- Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Michael Amoa-Bosompem
- Department of Biomedical and Diagnostic Sciences, University of Tennessee, Knoxville, TN, USA
| | - Ryo Matsumura
- Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Izumi Kai
- Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Toshinori Sasaki
- Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Yukiko Higa
- Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Haruhiko Isawa
- Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan.
| | - Shiroh Iwanaga
- Department of Parasitology and Tropical Medicine, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan.,Department of Molecular Protozoology, Research Center for Infectious Disease Control, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Tomoko Ishino
- Department of Parasitology and Tropical Medicine, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
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Tanaka T, Matsumura R, Miura T. Influence of Varied Load Assistance with Exoskeleton-Type Robotic Device on Gait Rehabilitation in Healthy Adult Men. Int J Environ Res Public Health 2022; 19:9713. [PMID: 35955068 PMCID: PMC9368586 DOI: 10.3390/ijerph19159713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 08/04/2022] [Accepted: 08/05/2022] [Indexed: 06/15/2023]
Abstract
This study aimed to clarify how the power-assist function of the hybrid assistive limb (HAL®), an exoskeleton-type gait-assist device, affected the gait characteristics of patients who wear it, specifically focusing on the "misalignment" of the robot joints and landmarks with the corresponding body parts. Five healthy adult men were video-recorded wearing the HAL® as they walked normally on a treadmill under seven conditions corresponding to the strengths and sites of robotic power assistance. For kinematic analysis, reflective markers were attached to the HAL® and the wearer at key locations, and participants were recorded walking past a set of four video cameras for each condition. A motion analysis system was used for analysis. The walking motion was segmented into eight-phase gait cycles. Knee misalignment, or the relative offset in position of the HAL®/wearer knee joints, was calculated from kinematic data and joint angles. These values were compared with respect to two factors: assist level and gait phase. Statistical analysis consisted of parametric and nonparametric tests for comparing the values of misalignment of each gait phase, followed by multiple comparisons to confirm significant differences. The results showed that the knee misalignment was greatest in the pre-swing phase and was significantly lower overall in conditions with high levels of power assistance. The result of greater knee misalignment in the pre-swing phase may be attributed to the structural properties of the HAL® lower-limb exoskeleton. This provides valuable insight regarding the walking stages that should be given special attention during the evaluation of synchrony between exoskeleton-type gait-assist robots and their wearers.
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Affiliation(s)
- Toshiaki Tanaka
- The Research Center for Advanced Science and Technology, Institute of Gerontology, The University of Tokyo, Tokyo 113-8656, Japan
- Department of Physical Therapy, Faculty of Health Sciences, Hokkaido University of Science, Sapporo 006-8585, Japan
| | - Ryo Matsumura
- Department of Physical Therapy, Faculty of Health Sciences, Hokkaido University of Science, Sapporo 006-8585, Japan
| | - Takahiro Miura
- National Institute of Advanced Industrial Science and Technology (AIST), Kashiwa 277-0882, Japan
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Matsumura R, Fukata N. Direct Detection of Free H 2 Outgassing in Blisters Formed in Al 2O 3 Atomic Layers Deposited on Si and Methods of Its Prevention. ACS Appl Mater Interfaces 2022; 14:1472-1477. [PMID: 34958568 DOI: 10.1021/acsami.1c20660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The phenomenon of blistering, seen in atomic layer-deposited aluminum oxide layers caused by thermal treatment, represents a serious problem in the field of device fabrication. Determining its causes and controlling them have been a major task in this field. Various groups have so far confronted the challenge, with several mechanisms having been proposed, but it is still under investigation. This paper reports how we have systematically characterized and summarized the blistering phenomenon from the viewpoints of annealing temperature and Al2O3-Si interface conditions. In this study, we have succeeded in directly detecting hydrogen gas generation from the interface between Si and Al2O3 using blister-penetrating Raman spectroscopy. The results have enabled us to propose a mechanism for blister formation using a hydrogen outgassing model. Based on our model, we also propose a method of suppressing blister formation by applying surface treatment or passivation to eliminate the Si-H bonds. These discoveries and methods will provide important insights that are applicable to a wide range of applications such as electronic devices and nanostructured solar cells.
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Affiliation(s)
- Ryo Matsumura
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Naoki Fukata
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
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Saito K, Hattori K, Hidese S, Sasayama D, Miyakawa T, Matsumura R, Tatsumi M, Yokota Y, Ota M, Hori H, Kunugi H. Profiling of Cerebrospinal Fluid Lipids and Their Relationship with Plasma Lipids in Healthy Humans. Metabolites 2021; 11:metabo11050268. [PMID: 33923144 PMCID: PMC8146161 DOI: 10.3390/metabo11050268] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 04/21/2021] [Accepted: 04/22/2021] [Indexed: 11/18/2022] Open
Abstract
Lipidomics provides an overview of lipid profiles in biological systems. Although blood is commonly used for lipid profiling, cerebrospinal fluid (CSF) is more suitable for exploring lipid homeostasis in brain diseases. However, whether an individual’s background affects the CSF lipid profile remains unclear, and the association between CSF and plasma lipid profiles in heathy individuals has not yet been defined. Herein, lipidomics approaches were employed to analyze CSF and plasma samples obtained from 114 healthy Japanese subjects. Results showed that the global lipid profiles differed significantly between CSF and plasma, with only 13 of 114 lipids found to be significantly correlated between the two matrices. Additionally, the CSF total protein content was the primary factor associated with CSF lipids. In the CSF, the levels of major lipids, namely, phosphatidylcholines, sphingomyelins, and cholesterolesters, correlated with CSF total protein levels. These findings indicate that CSF lipidomics can be applied to explore changes in lipid homeostasis in patients with brain diseases.
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Affiliation(s)
- Kosuke Saito
- Division of Medical Safety Science, National Institute of Health Sciences, Kanagawa 210-9501, Japan
- Correspondence: (K.S.); (H.K.); Tel.:+81-44-270-6628 (K.S.); +81-42-346-1714 (H.K.)
| | - Kotaro Hattori
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan; (K.H.); (S.H.); (D.S.); (T.M.); (M.T.); (Y.Y.); (M.O.); (H.H.)
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo 187-8551, Japan;
| | - Shinsuke Hidese
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan; (K.H.); (S.H.); (D.S.); (T.M.); (M.T.); (Y.Y.); (M.O.); (H.H.)
| | - Daimei Sasayama
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan; (K.H.); (S.H.); (D.S.); (T.M.); (M.T.); (Y.Y.); (M.O.); (H.H.)
| | - Tomoko Miyakawa
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan; (K.H.); (S.H.); (D.S.); (T.M.); (M.T.); (Y.Y.); (M.O.); (H.H.)
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo 187-8551, Japan;
| | - Ryo Matsumura
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo 187-8551, Japan;
| | - Megumi Tatsumi
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan; (K.H.); (S.H.); (D.S.); (T.M.); (M.T.); (Y.Y.); (M.O.); (H.H.)
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo 187-8551, Japan;
| | - Yuuki Yokota
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan; (K.H.); (S.H.); (D.S.); (T.M.); (M.T.); (Y.Y.); (M.O.); (H.H.)
| | - Miho Ota
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan; (K.H.); (S.H.); (D.S.); (T.M.); (M.T.); (Y.Y.); (M.O.); (H.H.)
| | - Hiroaki Hori
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan; (K.H.); (S.H.); (D.S.); (T.M.); (M.T.); (Y.Y.); (M.O.); (H.H.)
| | - Hiroshi Kunugi
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan; (K.H.); (S.H.); (D.S.); (T.M.); (M.T.); (Y.Y.); (M.O.); (H.H.)
- Department of Psychiatry, Teikyo University School of Medicine, Tokyo 173-8605, Japan
- Correspondence: (K.S.); (H.K.); Tel.:+81-44-270-6628 (K.S.); +81-42-346-1714 (H.K.)
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10
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Hidese S, Hattori K, Sasayama D, Tsumagari T, Miyakawa T, Matsumura R, Yokota Y, Ishida I, Matsuo J, Yoshida S, Ota M, Kunugi H. Cerebrospinal Fluid Inflammatory Cytokine Levels in Patients With Major Psychiatric Disorders: A Multiplex Immunoassay Study. Front Pharmacol 2021; 11:594394. [PMID: 33708113 PMCID: PMC7941212 DOI: 10.3389/fphar.2020.594394] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 12/29/2020] [Indexed: 01/10/2023] Open
Abstract
Aim: Accumulating evidence suggests that neural inflammation plays an important role in psychiatric disorders. We aimed to identify inflammatory cytokines involved in the pathophysiology of such disorders by quantifying them in cerebrospinal fluid (CSF) samples from a large sample of patients with major psychiatric disorders and healthy controls. Methods: The subjects included 94 patients with schizophrenia, 68 with bipolar disorder, 104 with major depressive disorder, and 118 healthy controls, matched for age, sex, and ethnicity (Japanese). Lumbar puncture was performed to collect these CSF samples. A multiplex immunoassay was then performed to measure CSF cytokine levels using magnetic on-bead antibody conjugation for 19 inflammatory cytokines. Results: CSF interferon-β level was significantly higher in total psychiatric patients than in healthy controls (corrected p = 0.000029). In diagnostic group comparisons, CSF interferon-β level was significantly higher in patients with schizophrenia, or bipolar disorder (corrected p = 0.000047 or 0.0034) than in healthy controls. Conclusion: We present novel evidence that CSF IFN-β level showed prominent statistical differences between psychiatric groups and healthy controls. This suggests IFN-β as the most important player among the 19 cytokines tested here in the inflammation-related pathophysiology of major psychiatric disorders.
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Affiliation(s)
- Shinsuke Hidese
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Kotaro Hattori
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan.,Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Daimei Sasayama
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Takuya Tsumagari
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan.,Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Tomoko Miyakawa
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Ryo Matsumura
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Yuuki Yokota
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan.,Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Ikki Ishida
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Junko Matsuo
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Sumiko Yoshida
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, Japan.,Department of Psychiatry, National Center Hospital, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Miho Ota
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Hiroshi Kunugi
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan.,Department of Psychiatry, Teikyo University School of Medicine, Tokyo, Japan
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11
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Ishiwata S, Hattori K, Hidese S, Sasayama D, Miyakawa T, Matsumura R, Yokota Y, Yoshida S, Kunugi H. Lower cerebrospinal fluid CRH concentration in chronic schizophrenia with negative symptoms. J Psychiatr Res 2020; 127:13-19. [PMID: 32339962 DOI: 10.1016/j.jpsychires.2020.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 02/22/2020] [Accepted: 03/18/2020] [Indexed: 11/24/2022]
Abstract
Some patients with schizophrenia have impaired hypothalamic-pituitary-adrenal axis function. However, there is a dearth of studies focusing on corticotropin-releasing hormone (CRH) levels in the brains of schizophrenia patients, which motivated us to examine whether cerebrospinal fluid (CSF) CRH concentrations are altered in these patients. We also examined the possible correlation of CSF CRH level with clinical variables such as schizophrenia symptoms and antipsychotic medication. The study population comprised 20 patients with a diagnosis of schizophrenia according to DSM-5 criteria and 25 healthy controls, who underwent lumbar puncture. Most of the patients were treated with antipsychotic drugs and their doses were converted to chlorpromazine (CP) equivalent values. CSF CRH concentrations were measured by an enzyme immunoassay. Symptom severity was assessed using the Positive and Negative Syndrome Scale (PANSS). There was a significantly lower CSF CRH concentration in the patients than in the controls (Mann-Whitney U test: p = 0.014). A significantly negative correlation of CSF CRH levels with PANSS negative scores was found in the patients (Spearman's: ρ = -0.58, p = 0.007). However, CSF CRH concentrations were not significantly correlated with the PANSS total (ρ = -0.035, p = 0.89), positive (ρ = 0.25, p = 0.30), or general psychopathology (ρ = 0.13, p = 0.59) scores. No significant correlation was found with CP equivalent values (ρ = 0.00, p = 1.00). In conclusion, we found that the patients with schizophrenia had lower CSF CRH concentrations compared to the controls and that the lower CSF CRH was associated with negative symptoms of the illness. Further studies in a larger sample and in drug-free patients are warranted.
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Affiliation(s)
- Sayuri Ishiwata
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, 187-8502, Japan
| | - Kotaro Hattori
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, 187-8502, Japan; Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, 187-8502, Japan
| | - Shinsuke Hidese
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, 187-8502, Japan
| | - Daimei Sasayama
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, 187-8502, Japan
| | - Tomoko Miyakawa
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, 187-8502, Japan
| | - Ryo Matsumura
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, 187-8502, Japan
| | - Yuuki Yokota
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, 187-8502, Japan
| | - Sumiko Yoshida
- Department of Psychiatry, National Center Hospital, National Center of Neurology and Psychiatry, Tokyo, 187-8551, Japan
| | - Hiroshi Kunugi
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, 187-8502, Japan.
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12
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Sakai J, Tarumoto N, Orihara Y, Kawamura R, Kodana M, Matsuzaki N, Matsumura R, Ogane K, Kawamura T, Takeuchi S, Imai K, Murakami T, Maesaki S, Maeda T. Evaluation of a high-speed but low-throughput RT-qPCR system for detection of SARS-CoV-2. J Hosp Infect 2020; 105:615-618. [PMID: 32446722 PMCID: PMC7242201 DOI: 10.1016/j.jhin.2020.05.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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: 04/06/2020] [Accepted: 05/18/2020] [Indexed: 12/17/2022]
Abstract
With the emergence of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), which causes coronavirus disease 2019 (COVID-19), a high-speed and convenient detection technology should be at the forefront of medical care worldwide. This study evaluated the usefulness of GeneSoC, a compact, high-speed reciprocal flow quantitative reverse transcription polymerase chain reaction system, for the detection of SARS-CoV-2. The results support the use of this system for the rapid identification of SARS-CoV-2. This approach can contribute to the strategic selection of initial management strategies for patients with COVID-19.
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Affiliation(s)
- J Sakai
- Department of Infectious Disease and Infection Control, Saitama Medical University, Saitama, Japan; Centre of Clinical Infectious Disease and Research, Saitama Medical University, Saitama, Japan
| | - N Tarumoto
- Department of Infectious Disease and Infection Control, Saitama Medical University, Saitama, Japan; Centre of Clinical Infectious Disease and Research, Saitama Medical University, Saitama, Japan.
| | - Y Orihara
- Department of Clinical Laboratory, Saitama Medical University Hospital, Saitama, Japan
| | - R Kawamura
- Department of Clinical Laboratory, Saitama Medical University Hospital, Saitama, Japan
| | - M Kodana
- Department of Clinical Laboratory, Saitama Medical University Hospital, Saitama, Japan
| | - N Matsuzaki
- Department of Clinical Laboratory, Saitama Medical University Hospital, Saitama, Japan
| | - R Matsumura
- Centre of Clinical Infectious Disease and Research, Saitama Medical University, Saitama, Japan
| | - K Ogane
- Department of Clinical Laboratory, Saitama Medical University Hospital, Saitama, Japan
| | - T Kawamura
- Department of Clinical Laboratory, Saitama Medical University Hospital, Saitama, Japan
| | - S Takeuchi
- Department of Clinical Laboratory, Saitama Medical University Hospital, Saitama, Japan
| | - K Imai
- Department of Infectious Disease and Infection Control, Saitama Medical University, Saitama, Japan; Centre of Clinical Infectious Disease and Research, Saitama Medical University, Saitama, Japan
| | - T Murakami
- Department of Microbiology, Saitama Medical University, Saitama, Japan
| | - S Maesaki
- Department of Infectious Disease and Infection Control, Saitama Medical University, Saitama, Japan; Centre of Clinical Infectious Disease and Research, Saitama Medical University, Saitama, Japan
| | - T Maeda
- Centre of Clinical Infectious Disease and Research, Saitama Medical University, Saitama, Japan; Department of Clinical Laboratory, Saitama Medical University Hospital, Saitama, Japan; Department of Laboratory Medicine, Saitama Medical University, Saitama, Japan
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13
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Hidese S, Hattori K, Sasayama D, Tsumagari T, Miyakawa T, Matsumura R, Yokota Y, Ishida I, Matsuo J, Yoshida S, Ota M, Kunugi H. Cerebrospinal fluid neuroplasticity-associated protein levels in patients with psychiatric disorders: a multiplex immunoassay study. Transl Psychiatry 2020; 10:161. [PMID: 32439851 PMCID: PMC7242469 DOI: 10.1038/s41398-020-0843-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 04/22/2020] [Accepted: 04/28/2020] [Indexed: 12/14/2022] Open
Abstract
To examine the role of neuroplasticity in the pathology of psychiatric disorders, we measured cerebrospinal fluid (CSF) neuroplasticity-associated protein levels. Participants were 94 patients with schizophrenia, 68 with bipolar disorder (BD), 104 with major depressive disorder (MDD), and 118 healthy controls, matched for age, sex, and ethnicity (Japanese). A multiplex immunoassay (22-plex assay) was performed to measure CSF neuroplasticity-associated protein levels. Among 22 proteins, 11 were successfully measured in the assay. CSF amyloid precursor protein (APP) and glial cell-derived neurotrophic factor (GDNF) levels were significantly lower in patients with schizophrenia, and CSF APP and neural cell adhesion molecule (NCAM)-1 levels were significantly lower in patients with BD, than in healthy controls (all p < 0.05). Positive and Negative Syndrome Scale total, positive, and general scores were significantly and positively correlated with CSF hepatocyte growth factor (HGF) (p < 0.01) and S100 calcium-binding protein B (S100B) (p < 0.05) levels in patients with schizophrenia. Young mania-rating scale score was significantly and positively correlated with CSF S100B level in patients with BD (p < 0.05). Hamilton Depression Rating Scale, core, sleep, activity, somatic anxiety, and delusion subscale scores were significantly and positively correlated with CSF HGF level, while sleep subscale score was positively correlated with CSF S100B and VEGF receptor 2 levels in patients with MDD (p < 0.05). Our results suggest that CSF APP, GDNF, and NCAM-1 levels are associated with psychiatric disorders, and that CSF HGF, S100B, and VEGF receptor 2 levels are related to psychiatric symptoms.
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Affiliation(s)
- Shinsuke Hidese
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1, Ogawa-Higashi, Kodaira, Tokyo, 187-8502, Japan.
| | - Kotaro Hattori
- grid.419280.60000 0004 1763 8916Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1, Ogawa-Higashi, Kodaira, Tokyo 187-8502 Japan ,grid.419280.60000 0004 1763 8916Medical Genome Center, National Center of Neurology and Psychiatry, 4-1-1, Ogawa-Higashi, Kodaira, Tokyo 187-8551 Japan
| | - Daimei Sasayama
- grid.419280.60000 0004 1763 8916Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1, Ogawa-Higashi, Kodaira, Tokyo 187-8502 Japan
| | - Takuya Tsumagari
- grid.419280.60000 0004 1763 8916Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1, Ogawa-Higashi, Kodaira, Tokyo 187-8502 Japan ,grid.419280.60000 0004 1763 8916Medical Genome Center, National Center of Neurology and Psychiatry, 4-1-1, Ogawa-Higashi, Kodaira, Tokyo 187-8551 Japan
| | - Tomoko Miyakawa
- grid.419280.60000 0004 1763 8916Medical Genome Center, National Center of Neurology and Psychiatry, 4-1-1, Ogawa-Higashi, Kodaira, Tokyo 187-8551 Japan
| | - Ryo Matsumura
- grid.419280.60000 0004 1763 8916Medical Genome Center, National Center of Neurology and Psychiatry, 4-1-1, Ogawa-Higashi, Kodaira, Tokyo 187-8551 Japan
| | - Yuuki Yokota
- grid.419280.60000 0004 1763 8916Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1, Ogawa-Higashi, Kodaira, Tokyo 187-8502 Japan ,grid.419280.60000 0004 1763 8916Medical Genome Center, National Center of Neurology and Psychiatry, 4-1-1, Ogawa-Higashi, Kodaira, Tokyo 187-8551 Japan
| | - Ikki Ishida
- grid.419280.60000 0004 1763 8916Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1, Ogawa-Higashi, Kodaira, Tokyo 187-8502 Japan
| | - Junko Matsuo
- grid.419280.60000 0004 1763 8916Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1, Ogawa-Higashi, Kodaira, Tokyo 187-8502 Japan
| | - Sumiko Yoshida
- grid.419280.60000 0004 1763 8916Medical Genome Center, National Center of Neurology and Psychiatry, 4-1-1, Ogawa-Higashi, Kodaira, Tokyo 187-8551 Japan ,grid.419280.60000 0004 1763 8916Department of Psychiatry, National Center Hospital, National Center of Neurology and Psychiatry, 4-1-1, Ogawa-Higashi, Kodaira, Tokyo 187-8551 Japan
| | - Miho Ota
- grid.419280.60000 0004 1763 8916Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1, Ogawa-Higashi, Kodaira, Tokyo 187-8502 Japan
| | - Hiroshi Kunugi
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1, Ogawa-Higashi, Kodaira, Tokyo, 187-8502, Japan.
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14
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Sasayama D, Hattori K, Yokota Y, Matsumura R, Teraishi T, Yoshida S, Kunugi H. Increased apolipoprotein E and decreased TNF-α in the cerebrospinal fluid of nondemented APOE-ε4 carriers. Neuropsychopharmacol Rep 2020; 40:201-205. [PMID: 32426945 PMCID: PMC7722685 DOI: 10.1002/npr2.12110] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 03/30/2020] [Accepted: 04/10/2020] [Indexed: 01/12/2023] Open
Abstract
Aim The ε4 allele of apolipoprotein E gene (APOE) is a well‐known risk factor of late‐onset Alzheimer's disease. However, little is known why this variant confers a risk for Alzheimer's disease. The aim of this study was to examine the influence of the APOE genotype on cerebrospinal fluid (CSF) protein levels. Methods The present study performed a secondary analysis on our previously generated database to compare the CSF levels of 1128 proteins between APOE‐ε4 carriers (28 subjects) and noncarriers (104 subjects). All subjects were physically healthy Japanese individuals without dementia. Results CSF levels of apoE2, apoE3, and apoE4 were significantly higher (all nominal P < 10 × 10−5, false discovery rate < 0.001) and those of tumor necrosis factor‐α (TNF‐α) were significantly lower (nominal P = 1.39 × 10−6, false discovery rate < 0.001) in APOE‐ε4 carriers than in noncarriers. No significant correlation was observed between the CSF levels of TNF‐α and any of the apoE proteins. Conclusions Our findings indicate the possible roles of apoE and TNF‐α in the pathogenesis of APOE‐ε4‐associated Alzheimer's disease. The CSF levels of apoE2, apoE3, and apoE4 were higher in APOE‐ε4 carriers. The CSF levels of TNF‐α were significantly lower in APOE‐ε4 carriers. Our findings indicate the possible roles of apoE and TNF‐α in the pathogenesis of APOE‐ε4‐associated Alzheimer's disease.![]()
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Affiliation(s)
- Daimei Sasayama
- Department of Mental Disorder Research, National Center of Neurology and Psychiatry, National Institute of Neuroscience, Kodaira, Japan.,Department of Psychiatry, Shinshu University School of Medicine, Matsumoto, Japan.,Child and Adolescent Developmental Psychiatry, Shinshu University School of Medicine, Matsumoto, Japan
| | - Kotaro Hattori
- Department of Mental Disorder Research, National Center of Neurology and Psychiatry, National Institute of Neuroscience, Kodaira, Japan.,Medical Genome Center, National Center of Neurology and Psychiatry, Kodaira, Japan
| | - Yuuki Yokota
- Department of Mental Disorder Research, National Center of Neurology and Psychiatry, National Institute of Neuroscience, Kodaira, Japan.,Medical Genome Center, National Center of Neurology and Psychiatry, Kodaira, Japan
| | - Ryo Matsumura
- Medical Genome Center, National Center of Neurology and Psychiatry, Kodaira, Japan
| | - Toshiya Teraishi
- Department of Mental Disorder Research, National Center of Neurology and Psychiatry, National Institute of Neuroscience, Kodaira, Japan
| | - Sumiko Yoshida
- Medical Genome Center, National Center of Neurology and Psychiatry, Kodaira, Japan.,Department of Psychiatry, National Center of Neurology and Psychiatry, National Center Hospital, Kodaira, Japan
| | - Hiroshi Kunugi
- Department of Mental Disorder Research, National Center of Neurology and Psychiatry, National Institute of Neuroscience, Kodaira, Japan.,Department of Psychiatry, Teikyo University School of Medicine, Itabashi-ku, Japan
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15
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Ogawa S, Hattori K, Ota M, Hidese S, Miyakawa T, Matsumura R, Yokota Y, Ishida I, Matsuo J, Yoshida S, Yamazaki Y, Goodenowe D, Kunugi H. Altered ethanolamine plasmalogen and phosphatidylethanolamine levels in blood plasma of patients with bipolar disorder. Psychiatry Clin Neurosci 2020; 74:204-210. [PMID: 31841251 DOI: 10.1111/pcn.12967] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 11/21/2019] [Accepted: 12/02/2019] [Indexed: 12/12/2022]
Abstract
AIM Ethanolamine-containing phospholipids are synthesized in endoplasmic reticulum (ER) and mitochondria. ER stress and mitochondrial dysfunction have been implicated in bipolar disorder (BP). In this study, we aimed to examine the relationship of ethanolamine plasmalogen (PLE) and phosphatidylethanolamine (PTE) levels in blood plasma with BP. METHODS Plasma PLE and PTE levels were compared between 34 patients with BP (DSM-IV) and 38 healthy control participants matched for age, sex, and ethnicity (Japanese). Furthermore, the relationships of plasma PLE and PTE levels with clinical variables were explored. RESULTS Plasma PLE levels were significantly lower in patients with BP than in healthy controls (P = 0.0033). In subgroup analyses, plasma PLE levels were significantly lower in patients with BP type I (BP I) than in healthy controls (P = 0.0047); furthermore, plasma PTE levels were significantly lower in patients with BP I than in controls (P = 0.016) and patients with BP type II (BP II) (P = 0.010). Receiver-operating characteristic curve analysis revealed that the discriminatory power of plasma PTE levels for distinguishing between BP I and II was fair (area under the curve = 0.78; P = 0.0095). There were no significant correlations of plasma PLE or PTE levels with depression or manic symptoms in patients. CONCLUSIONS Plasma PLE and PTE levels were associated with BP I, but not with BP II. Moreover, plasma PTE levels differed between patients with BP I and II. Our findings highlight the importance of ethanolamine phospholipids in the pathophysiology of BP, especially BP I.
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Affiliation(s)
- Shintaro Ogawa
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Kotaro Hattori
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan.,Medical Genome Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Miho Ota
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Shinsuke Hidese
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Tomoko Miyakawa
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan.,Medical Genome Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Ryo Matsumura
- Medical Genome Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Yuuki Yokota
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan.,Medical Genome Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Ikki Ishida
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Junko Matsuo
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Sumiko Yoshida
- Department of Psychiatry, National Center Hospital, National Center of Neurology and Psychiatry, Tokyo, Japan
| | | | | | - Hiroshi Kunugi
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
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16
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Matsumura R, Tsutsumi Y, Fujieda I. Concentric re-emission pattern from a planar waveguide with a thin uniform luminescent layer. Appl Opt 2020; 59:1703-1710. [PMID: 32225679 DOI: 10.1364/ao.384323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 01/11/2020] [Indexed: 06/10/2023]
Abstract
When a beam of light excites a single spot on a thin luminescent layer embedded in a planar waveguide, a concentric re-emission pattern is observed. An analytical expression is formulated by following the series of events in the waveguide: generation of angle-dependent photoluminescence spectra, reflection at the waveguide-air boundary, absorption by the luminescent layer, and generation of next-generation photoluminescence. The formula reproduces the peak radii observed in the experiments with some organic dyes. It provides insights for the re-emission events in a luminescent solar concentrator and the cross talk in an energy-harvesting display based on photoluminescence.
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17
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Yunoki K, Matsumura R, Kohmoto T, Ohta M, Tsutsumi Y, Fujieda I. Cross talk and optical efficiency of an energy-harvesting color projector utilizing ceramic phosphors. Appl Opt 2019; 58:9896-9903. [PMID: 31873635 DOI: 10.1364/ao.58.009896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 11/07/2019] [Indexed: 06/10/2023]
Abstract
A color projector screen was fabricated by filling three kinds of ceramic phosphor powders in the periodic hollow columns formed in a ${50}\;{{\rm mm}}\; \times \;{50}\;{{\rm mm}}\; \times \;{10}\;{{\rm mm}}$50mm×50mm×10mm acrylic waveguide. When a blue laser beam excited a single spot on the screen, a disk-shaped cross-talk pattern appeared. Its intensity was 5 orders of magnitude lower than that of the excited spot. The solar cells attached to the waveguide edge harvested less than 0.8% of the incident optical power. The photons scattered by the phosphors are responsible for these characteristics, and the use of non-scattering luminescent materials is desired for improving them.
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18
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Sun YL, Matsumura R, Jevasuwan W, Fukata N. Au-Sn Catalyzed Growth of Ge 1-xSn x Nanowires: Growth Direction, Crystallinity, and Sn Incorporation. Nano Lett 2019; 19:6270-6277. [PMID: 31448621 DOI: 10.1021/acs.nanolett.9b02395] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Ge1-xSnx nanowires (NWs) have been a focus of research attention for their potential in realizing next-generation Si-compatible electronic and optoelectronic devices. To control the growth of NWs and increase their Sn content, the growth mechanism needs to be understood. The use of Au-Sn alloy catalysts instead of Au catalysts allows an easier understanding of Ge1-xSnx NW growth, and the effects of Sn at different concentrations in catalysts on growth direction, Sn incorporation, and crystallinity of Ge1-xSnx NWs can be clarified. High Sn content in Au-Sn alloy catalysts favors ⟨110⟩-oriented NW growth and high Sn incorporation in NWs. The higher Sn content in Au-Sn alloy catalysts also improves the crystallinity of NWs.
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Affiliation(s)
- Yong-Lie Sun
- International Center for Materials Nanoarchitectonics , National Institute for Materials Science , 1-1 Namiki , Tsukuba 305-0044 , Japan
- Institute of Applied Physics , University of Tsukuba , 1-1-1 Tennodai , Tsukuba 305-8573 , Japan
| | - Ryo Matsumura
- International Center for Materials Nanoarchitectonics , National Institute for Materials Science , 1-1 Namiki , Tsukuba 305-0044 , Japan
| | - Wipakorn Jevasuwan
- International Center for Materials Nanoarchitectonics , National Institute for Materials Science , 1-1 Namiki , Tsukuba 305-0044 , Japan
| | - Naoki Fukata
- International Center for Materials Nanoarchitectonics , National Institute for Materials Science , 1-1 Namiki , Tsukuba 305-0044 , Japan
- Institute of Applied Physics , University of Tsukuba , 1-1-1 Tennodai , Tsukuba 305-8573 , Japan
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19
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Matsumura R, Igari H, Nakazawa T, Ishikawa S, Tsuyuzaki M, Suzuki K, Yamagishi F. Comparative utility of interferon-γ release assay, QuantiFERON ® TB-GIT and T-SPOT ®.TB in rheumatoid arthritis. Int J Tuberc Lung Dis 2018; 20:1546-1553. [PMID: 27776599 DOI: 10.5588/ijtld.16.0038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
SETTING National hospital for tuberculosis (TB) and rheumatoid arthritis (RA) in Japan. OBJECTIVE To compare two interferon-γ release assays (IGRAs), QuantiFERON®-TB Gold In-Tube (QFT) and T-SPOT®.TB (T-SPOT), in RA patients for detecting latent tuberculous infection (LTBI). DESIGN QFT and T-SPOT were conducted concurrently in 230 prospectively enrolled RA patients. RESULTS There were no active TB patients. The percentage of QFT- and T-SPOT-positive patients was respectively 8.3% and 5.7%. In patients aged ⩾60 years, these proportions were respectively 12.3% and 7.2%. The percentage of QFT positivity and T-SPOT positivity at age <60 years was respectively 2.2% and 3.3%. After multivariate logistic analysis for QFT positivity, age ⩾60 years and TB suspected based on chest X-ray were selected as independent factors, with adjusted odds ratios of respectively 4.73 and 3.25. No factors were selected for T-SPOT positivity. CONCLUSION QFT had a higher positivity rate. In the light of the previous estimated rate of LTBI in Japan, both IGRAs underestimate LTBI, and neither IGRA has enough capability to detect LTBI.
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Affiliation(s)
- R Matsumura
- Center of Rheumatology, Allergy & Clinical Immunology, National Hospital Organization Chiba-East Hospital, Chiba, Japan
| | - H Igari
- Department of Respiratory Medicine, National Hospital Organization Chiba-East Hospital, Chiba, Division of Infection Control, Chiba University Hospital, Chiba, Japan
| | - T Nakazawa
- Center of Rheumatology, Allergy & Clinical Immunology, National Hospital Organization Chiba-East Hospital, Chiba, Japan
| | - S Ishikawa
- Department of Respiratory Medicine, National Hospital Organization Chiba-East Hospital, Chiba, Japan
| | - M Tsuyuzaki
- Chiba Foundation for Health Promotion and Disease Prevention, Chiba, Japan
| | - K Suzuki
- Chiba Foundation for Health Promotion and Disease Prevention, Chiba, Japan
| | - F Yamagishi
- Department of Respiratory Medicine, National Hospital Organization Chiba-East Hospital, Chiba, Japan
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20
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Ishiwata S, Hattori K, Sasayama D, Teraishi T, Miyakawa T, Yokota Y, Matsumura R, Nishikawa T, Kunugi H. Cerebrospinal fluid D-serine concentrations in major depressive disorder negatively correlate with depression severity. J Affect Disord 2018; 226:155-162. [PMID: 28985587 DOI: 10.1016/j.jad.2017.09.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2017] [Revised: 07/09/2017] [Accepted: 09/23/2017] [Indexed: 12/28/2022]
Abstract
BACKGROUND D-serine is an endogenous co-agonist of N-methyl-D-aspartate receptor (NMDAR) and plays an important role in glutamate neurotransmission. Several studies suggested the possible involvement of D-serine related in the pathophysiology of psychiatric disorders including major depression disorders (MDD). We tried to examine whether cerebrospinal fluid (CSF) or plasma D-serine concentrations are altered in MDD and whether D-serine concentrations correlated with disease severity. METHODS 26 MDD patients and 27 healthy controls matched for age, sex and ethnicity were enrolled. We measured amino acids in these samples using by high-performance liquid chromatography with fluorometric detection. RESULTS D-serine and L-serine, precursor of D-serine, levels in CSF or plasma were not significantly different in patients of MDD compared to controls. Furthermore, a significant correlation between D-serine levels in CSF and Hamilton Depression Rating Scale (HAMD)-17 score was observed (r = -0.65, p = 0.006). Furthermore, we found a positive correlation between CSF D-serine and HVA concentrations in MDD patients (r = 0.54, p = 0.007). CSF D-serine concentrations were correlated with those of plasma in MDD (r = 0.61, p = 0.01) but not in controls. In CSF, we also confirmed a significant correlation between D-serine and L-serine levels in MDD (r = 0.72, p < 0.0001) and controls (r = 0.70, p < 0.0001). CONCLUSIONS The study has some limitations; sample size was relatively small and most patients were medicated. We revealed that CSF D-serine concentrations were correlated with depression severity and HVA concentrations and further investigation were required to reveal the effect of medication and disease heterogeneity.
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Affiliation(s)
- Sayuri Ishiwata
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan; Department of Psychiatry and Behavioral Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8519, Japan
| | - Kotaro Hattori
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan; Translational Medical Center, National Center of Neurology and Psychiatry, Tokyo 187-8551, Japan
| | - Daimei Sasayama
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan
| | - Toshiya Teraishi
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan
| | - Tomoko Miyakawa
- Translational Medical Center, National Center of Neurology and Psychiatry, Tokyo 187-8551, Japan
| | - Yuuki Yokota
- Translational Medical Center, National Center of Neurology and Psychiatry, Tokyo 187-8551, Japan
| | - Ryo Matsumura
- Translational Medical Center, National Center of Neurology and Psychiatry, Tokyo 187-8551, Japan
| | - Toru Nishikawa
- Department of Psychiatry and Behavioral Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8519, Japan
| | - Hiroshi Kunugi
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan.
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21
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Sasayama D, Hattori K, Ogawa S, Yokota Y, Matsumura R, Teraishi T, Hori H, Ota M, Yoshida S, Kunugi H. Genome-wide quantitative trait loci mapping of the human cerebrospinal fluid proteome. Hum Mol Genet 2017; 26:44-51. [PMID: 28031287 DOI: 10.1093/hmg/ddw366] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 10/21/2016] [Indexed: 11/12/2022] Open
Abstract
Cerebrospinal fluid (CSF) is virtually the only one accessible source of proteins derived from the central nervous system (CNS) of living humans and possibly reflects the pathophysiology of a variety of neuropsychiatric diseases. However, little is known regarding the genetic basis of variation in protein levels of human CSF. We examined CSF levels of 1,126 proteins in 133 subjects and performed a genome-wide association analysis of 514,227 single nucleotide polymorphisms (SNPs) to detect protein quantitative trait loci (pQTLs). To be conservative, Spearman's correlation was used to identify an association between genotypes of SNPs and protein levels. A total of 421 cis and 25 trans SNP-protein pairs were significantly correlated at a false discovery rate (FDR) of less than 0.01 (nominal P < 7.66 × 10-9). Cis-only analysis revealed additional 580 SNP-protein pairs with FDR < 0.01 (nominal P < 2.13 × 10-5). pQTL SNPs were more likely, compared to non-pQTL SNPs, to be a disease/trait-associated variants identified by previous genome-wide association studies. The present findings suggest that genetic variations play an important role in the regulation of protein expression in the CNS. The obtained database may serve as a valuable resource to understand the genetic bases for CNS protein expression pattern in humans.
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Affiliation(s)
- Daimei Sasayama
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Ogawahigashi, Kodaira, Tokyo, Japan.,Department of Psychiatry, Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - Kotaro Hattori
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Ogawahigashi, Kodaira, Tokyo, Japan.,Translational Medical Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Shintaro Ogawa
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Ogawahigashi, Kodaira, Tokyo, Japan
| | - Yuuki Yokota
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Ogawahigashi, Kodaira, Tokyo, Japan.,Translational Medical Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Ryo Matsumura
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Ogawahigashi, Kodaira, Tokyo, Japan.,Translational Medical Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Toshiya Teraishi
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Ogawahigashi, Kodaira, Tokyo, Japan
| | - Hiroaki Hori
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Ogawahigashi, Kodaira, Tokyo, Japan
| | - Miho Ota
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Ogawahigashi, Kodaira, Tokyo, Japan
| | - Sumiko Yoshida
- Department of Psychiatry, National Center Hospital, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Hiroshi Kunugi
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Ogawahigashi, Kodaira, Tokyo, Japan
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22
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Ishiwata S, Hattori K, Sasayama D, Teraishi T, Miyakawa T, Yokota Y, Matsumura R, Yoshida F, Nishikawa T, Kunugi H. Plasma and cerebrospinal fluid G72 protein levels in schizophrenia and major depressive disorder. Psychiatry Res 2017; 254:244-250. [PMID: 28477547 DOI: 10.1016/j.psychres.2017.04.060] [Citation(s) in RCA: 9] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Revised: 04/11/2017] [Accepted: 04/12/2017] [Indexed: 01/15/2023]
Abstract
G72 is a modulator of D-amino acid oxidase, the enzyme that degrades D-serine, an amino acid that plays a critical role in glutamate neurotransmission, and has been implicated in psychiatric disorders. The aim of this study was to examine whether plasma or cerebrospinal fluid (CSF) G72 protein levels were altered in either schizophrenia or major depressive disorder (MDD) and whether any correlation between G72 levels and disease severity existed. Initially, 27 schizophrenic patients, 26 MDD patients, and 27 healthy controls matched for age, sex, and ethnicity were enrolled. Compared to those of controls, plasma or CSF G72 levels were not significantly different in patients with schizophrenia or MDD. Although we found a significant positive correlation between plasma G72 levels and a positive symptoms score on the positive and negative syndrome scale (PANSS), this was not replicated in the second study (40 schizophrenic patients). CSF G72 levels showed no significant correlation with PANSS scores. In MDD, neither plasma nor CSF G72 levels correlated significantly with depression severity. Since severity of our patients were relatively mild, further investigations in a large number of subjects including drug-free patients, younger patients, and more severely affected patients are warranted.
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Affiliation(s)
- Sayuri Ishiwata
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan; Department of Psychiatry and Behavioral Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8519, Japan
| | - Kotaro Hattori
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan; Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo 187-8551, Japan
| | - Daimei Sasayama
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan
| | - Toshiya Teraishi
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan
| | - Tomoko Miyakawa
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo 187-8551, Japan
| | - Yuuki Yokota
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo 187-8551, Japan
| | - Ryo Matsumura
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo 187-8551, Japan
| | - Fuyuko Yoshida
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan
| | - Toru Nishikawa
- Department of Psychiatry and Behavioral Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8519, Japan
| | - Hiroshi Kunugi
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan.
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23
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Yamamoto H, Matsumura R, Takaoki H, Katsurabayashi S, Hirano-Iwata A, Niwano M. Unidirectional signal propagation in primary neurons micropatterned at a single-cell resolution. Appl Phys Lett 2016; 109:043703. [PMID: 27746482 PMCID: PMC5030838 DOI: 10.1063/1.4959836] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 07/14/2016] [Indexed: 05/04/2023]
Abstract
The structure and connectivity of cultured neuronal networks can be controlled by using micropatterned surfaces. Here, we demonstrate that the direction of signal propagation can be precisely controlled at a single-cell resolution by growing primary neurons on micropatterns. To achieve this, we first examined the process by which axons develop and how synapses form in micropatterned primary neurons using immunocytochemistry. By aligning asymmetric micropatterns with a marginal gap, it was possible to pattern primary neurons with a directed polarization axis at the single-cell level. We then examined how synapses develop on micropatterned hippocampal neurons. Three types of micropatterns with different numbers of short paths for dendrite growth were compared. A normal development in synapse density was observed when micropatterns with three or more short paths were used. Finally, we performed double patch clamp recordings on micropatterned neurons to confirm that these synapses are indeed functional, and that the neuronal signal is transmitted unidirectionally in the intended orientation. This work provides a practical guideline for patterning single neurons to design functional neuronal networks in vitro with the direction of signal propagation being controlled.
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Affiliation(s)
- H Yamamoto
- Frontier Research Institute for Interdisciplinary Sciences, Tohoku University , 6-3 Aramaki-aza Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - R Matsumura
- Graduate School of Biomedical Engineering, Tohoku University , 6-6 Aramaki-aza Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - H Takaoki
- Research Institute of Electrical Communication, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - S Katsurabayashi
- Faculty of Pharmaceutical Sciences, Fukuoka University , 8-19-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan
| | - A Hirano-Iwata
- Graduate School of Biomedical Engineering, Tohoku University , 6-6 Aramaki-aza Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - M Niwano
- Research Institute of Electrical Communication, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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24
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Matsumura R, Yamamoto H, Niwano M, Hirano-Iwata A. An electrically resistive sheet of glial cells for amplifying signals of neuronal extracellular recordings. Appl Phys Lett 2016; 108:023701. [PMID: 27703279 PMCID: PMC5035130 DOI: 10.1063/1.4939629] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 12/24/2015] [Indexed: 06/06/2023]
Abstract
Electrical signals of neuronal cells can be recorded non-invasively and with a high degree of temporal resolution using multielectrode arrays (MEAs). However, signals that are recorded with these devices are small, usually 0.01%-0.1% of intracellular recordings. Here, we show that the amplitude of neuronal signals recorded with MEA devices can be amplified by covering neuronal networks with an electrically resistive sheet. The resistive sheet used in this study is a monolayer of glial cells, supportive cells in the brain. The glial cells were grown on a collagen-gel film that is permeable to oxygen and other nutrients. The impedance of the glial sheet was measured by electrochemical impedance spectroscopy, and equivalent circuit simulations were performed to theoretically investigate the effect of covering the neurons with such a resistive sheet. Finally, the effect of the resistive glial sheet was confirmed experimentally, showing a 6-fold increase in neuronal signals. This technique feasibly amplifies signals of MEA recordings.
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Affiliation(s)
- R Matsumura
- Graduate School of Biomedical Engineering, Tohoku University , 6-6 Aramaki-aza Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - H Yamamoto
- Frontier Research Institute for Interdisciplinary Sciences, Tohoku University , 6-3 Aramaki-aza Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - M Niwano
- Research Institute of Electrical Communication, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - A Hirano-Iwata
- Graduate School of Biomedical Engineering, Tohoku University , 6-6 Aramaki-aza Aoba, Aoba-ku, Sendai 980-8579, Japan
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25
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Yamamoto M, Matsumura R, Hirata Y, Nagamune H. Evaluation of biocompatibility of novel and commonly-used antiseptics by cell culture method. Antimicrob Resist Infect Control 2015. [PMCID: PMC4474659 DOI: 10.1186/2047-2994-4-s1-p38] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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26
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Goto KI, Tahara M, Matsumura R, Sugiyama S, Kawamoto T. THU0029 Identification of Cerebral Infarction-Specific Antibody Markers from Autoantibodies Detected in Patients with Systemic Lupus Erythematosus. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.4006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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27
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Ogawa S, Hattori K, Sasayama D, Yokota Y, Matsumura R, Matsuo J, Ota M, Hori H, Teraishi T, Yoshida S, Noda T, Ohashi Y, Sato H, Higuchi T, Motohashi N, Kunugi H. Reduced cerebrospinal fluid ethanolamine concentration in major depressive disorder. Sci Rep 2015; 5:7796. [PMID: 25589364 PMCID: PMC4295090 DOI: 10.1038/srep07796] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 12/17/2014] [Indexed: 12/25/2022] Open
Abstract
Amino acids play key roles in the function of the central nervous system, and their alterations are implicated in psychiatric disorders. In the search for a biomarker for major depressive disorder (MDD), we used high-performance liquid chromatography to measure amino acids and related molecules in the cerebrospinal fluid (CSF) of 52 patients with MDD (42 depressed and 10 remitted; DSM-IV) and 54 matched controls. Significant differences were found in four amino acid concentrations between the depressed patients and controls. After Bonferroni correction, only ethanolamine (EA) levels remained significantly reduced in depressed patients (nominal P = 0.0000011). A substantial proportion of the depressed patients (40.5%) showed abnormally low CSF EA levels (<12.1 μM) (P = 0.000033; OR = 11.6, 95% CI: 3.1–43.2). When patients with low EA and those with high EA levels were compared, the former had higher scores for overall depression severity (P = 0.0033) and ‘Somatic Anxiety’ symptoms (P = 0.00026). In unmedicated subjects, CSF EA levels showed a significant positive correlation with levels of homovanillic acid (P = 0.0030) and 5-hydroxyindoleacetic acid (P = 0.019). To our knowledge, this is the first study showing that patients with MDD have significantly lower CSF EA concentrations compared with control subjects. CSF EA could be a state-dependent biomarker for a subtype of MDD.
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Affiliation(s)
- Shintaro Ogawa
- 1] Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8502, Japan [2] Department of Neuropsychiatry, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Yamanashi, 409-3898, Japan
| | - Kotaro Hattori
- 1] Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8502, Japan [2] Translational Medical Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8551, Japan
| | - Daimei Sasayama
- 1] Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8502, Japan [2] Department of Psychiatry, Shinshu University School of Medicine, Matsumoto, Nagano, 390-8621, Japan
| | - Yuki Yokota
- 1] Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8502, Japan [2] Translational Medical Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8551, Japan
| | - Ryo Matsumura
- 1] Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8502, Japan [2] Translational Medical Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8551, Japan
| | - Junko Matsuo
- 1] Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8502, Japan [2] Department of Neuropsychiatry, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Yamanashi, 409-3898, Japan
| | - Miho Ota
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8502, Japan
| | - Hiroaki Hori
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8502, Japan
| | - Toshiya Teraishi
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8502, Japan
| | - Sumiko Yoshida
- Department of Psychiatry, National Center Hospital, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8551, Japan
| | - Takamasa Noda
- Department of Psychiatry, National Center Hospital, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8551, Japan
| | - Yoshiaki Ohashi
- Human Metabolome Technologies, Inc., Tsuruoka, Yamagata, 997-0052, Japan
| | - Hajime Sato
- Human Metabolome Technologies, Inc., Tsuruoka, Yamagata, 997-0052, Japan
| | - Teruhiko Higuchi
- National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8551, Japan
| | - Nobutaka Motohashi
- Department of Neuropsychiatry, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Yamanashi, 409-3898, Japan
| | - Hiroshi Kunugi
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8502, Japan
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Takahashi J, Tamura K, Suda T, Matsumura R, Onda Y. Vertical distribution and temporal changes of 137Cs in soil profiles under various land uses after the Fukushima Dai-ichi Nuclear Power Plant accident. J Environ Radioact 2015; 139:351-361. [PMID: 25106877 DOI: 10.1016/j.jenvrad.2014.07.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 07/02/2014] [Accepted: 07/06/2014] [Indexed: 06/03/2023]
Abstract
We monitored the vertical distribution of (137)Cs in soil profiles under eight different land uses for the 2 y after the Fukushima Dai-ichi Nuclear Power Plant accident, and discussed the temporal changes in the early-stage of the migration and the determinants of the initial distribution. The soil samples were collected for four surveys using a scraper plate at each study site, which consisted of three forests (mixed forest, mature cedar, and young cedar), two grasslands (pasture and meadow) and three abandoned agricultural fields (farm land, tobacco field, and paddy field). The land use patterns have a large influence on some soil properties and the migration processes of (137)Cs above ground, resulting in different distribution of (137)Cs in those soil profiles. Specifically, the secondary deposition of (137)Cs from the coniferous canopy, retention of (137)Cs by litter layer, and the homogenization of (137)Cs concentrations in surface soil by natural soil mixing such as the disturbance by cattle grazing, roots growing and the formation of needle ice were important to cause redistribution of the deposited (137)Cs. Only in the paddy field, the (137)Cs inventory in subsurface soils (5-10 cm) gradually increased and comprised 26% of the total (137)Cs in 2 y, showing the downward migration of (137)Cs to subsurface soil. In the other sites, it was considered that (137)Cs were strongly adsorbed by soil particles and rarely migrated downward as soluble form. Vertical distributions during the first survey were able to be used as the initial distributions and were well fitted to the exponential equation. The distribution parameters α (relaxation depth) and β (relaxation mass depth), calculated by the exponential equation were correlated with RIP (r = -0.806, p < 0.05), macro pore (r = 0.651, p = 0.11), and dispersible fine particle content (r = 0.856, p < 0.05). It indicated that the initial distribution would be influenced by the Cs fixation ability of soil, and the penetration process of water and particles in soils.
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Affiliation(s)
- Junko Takahashi
- Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
| | - Kenji Tamura
- Faculty of Life and Environmental Sciences, University of Tsukuba, Japan
| | - Tomoya Suda
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Japan
| | - Ryo Matsumura
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Japan
| | - Yuichi Onda
- Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
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Sanayama Y, Ikeda K, Saito Y, Kagami SI, Yamagata M, Furuta S, Kashiwakuma D, Iwamoto I, Umibe T, Nawata Y, Matsumura R, Sugiyama T, Sueishi M, Hiraguri M, Nonaka K, Ohara O, Nakajima H. FRI0007 Prediction of Therapeutic Responses to TOCILIZUMAB in Patients with Rheumatoid Arthritis Using Biomarkers Identified by Genome-Wide DNA Microarray Analysis in Peripheral Blood Mononuclear Cells. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.2293] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Abidin MSZ, Matsumura R, Anisuzzaman M, Park JH, Muta S, Mahmood MR, Sadoh T, Hashim AM. Crystallization of Electrodeposited Germanium Thin Film on Silicon (100). Materials (Basel) 2013; 6:5047-5057. [PMID: 28788375 PMCID: PMC5452791 DOI: 10.3390/ma6115047] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 10/21/2013] [Accepted: 10/28/2013] [Indexed: 11/25/2022]
Abstract
We report the crystallization of electrodeposited germanium (Ge) thin films on n-silicon (Si) (100) by rapid melting process. The electrodeposition was carried out in germanium (IV) chloride: propylene glycol (GeCl4:C3H8O2) electrolyte with constant current of 50 mA for 30 min. The measured Raman spectra and electron backscattering diffraction (EBSD) images show that the as-deposited Ge thin film was amorphous. The crystallization of deposited Ge was achieved by rapid thermal annealing (RTA) at 980 °C for 1 s. The EBSD images confirm that the orientations of the annealed Ge are similar to that of the Si substrate. The highly intense peak of Raman spectra at 300 cm−1 corresponding to Ge-Ge vibration mode was observed, indicating good crystal quality of Ge. An additional sub peak near to 390 cm−1 corresponding to the Si-Ge vibration mode was also observed, indicating the Ge-Si mixing at Ge/Si interface. Auger electron spectroscopy (AES) reveals that the intermixing depth was around 60 nm. The calculated Si fraction from Raman spectra was found to be in good agreement with the value estimated from Ge-Si equilibrium phase diagram. The proposed technique is expected to be an effective way to crystallize Ge films for various device applications as well as to create strain at the Ge-Si interface for enhancement of mobility.
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Affiliation(s)
| | - Ryo Matsumura
- Department of Electronics, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan.
| | - Mohammad Anisuzzaman
- Department of Electronics, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan.
| | - Jong-Hyeok Park
- Department of Electronics, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan.
| | - Shunpei Muta
- Department of Electronics, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan.
| | - Mohamad Rusop Mahmood
- Faculty of Electrical Engineering, Universiti Teknologi MARA, Selangor, Shah Alam 40450, Malaysia.
| | - Taizoh Sadoh
- Department of Electronics, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan.
| | - Abdul Manaf Hashim
- Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Jalan Semarak, Kuala Lumpur 54100, Malaysia.
- MIMOS Berhad, Technology Park Malaysia, Kuala Lumpur 57000, Malaysia.
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Sanayama Y, Ikeda K, Kagami S, Furuta S, Kashiwakuma D, Matsuura I, Yamagata M, Iwamoto I, Umibe T, Matsumura R, Sugiyama T, Sueishi M, Nawata Y, Hiraguri M, Nonaka K, Ohara O, Nakajima H. FRI0208 Prediction of treatment response of tocilizumab for rheumatoid arthritis with comprehensive gene expression analysis in peripheral blood mononuclear cells. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2665] [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: 11/04/2022]
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Hashii Y, Sato-Miyashita E, Matsumura R, Kusuki S, Yoshida H, Ohta H, Hosen N, Tsuboi A, Oji Y, Oka Y, Sugiyama H, Ozono K. WT1 peptide vaccination following allogeneic stem cell transplantation in pediatric leukemic patients with high risk for relapse: successful maintenance of durable remission. Leukemia 2011; 26:530-2. [PMID: 21869838 DOI: 10.1038/leu.2011.226] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Matsumura R, Umemiya K, Sugiyama T, Sueishi M, Umibe T, Ichikawa K, Yoshimura M. Anti-tumor necrosis factor therapy in patients with difficult-to-treat lupus nephritis: a prospective series of nine patients. Clin Exp Rheumatol 2009; 27:416-421. [PMID: 19604433] [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]
Abstract
OBJECTIVE To clarify the efficacy and safety of anti-TNF-alpha therapy for intractable lupus nephritis. METHODS In nine patients with systemic erythematosus who presented with lupus nephritis resistant to steroids and immunosuppressants, 200 mg/body of infliximab was drip-infused three times. No changes were made to other treatments for three months after the start of anti-TNF-alpha therapy, and urinary findings, renal function, serum complement, anti-DNA antibody, SLE activity, and adverse events were examined for six months after the start of anti-TNF-alpha therapy. RESULTS One of the nine patients developed pyelonephritis after the first infliximab injection and received no further injections. The remaining eight patients received 3 infliximab injections. Of the eight patients, urinary protein decreased after anti-TNF-alpha therapy in six patients, and the SLEDAI improved in five patients. Urinary findings and/or SLE activity improved in six patients. Of the patients whose urinary protein levels decreased after anti-TNF-alpha therapy, proteinuria recurred six months after anti-TNF-alpha therapy in one patient. After anti-TNF-alpha therapy, proteinuria and the SLEDAI improved significantly. With respect to adverse events, therapy was discontinued in one patient who developed pyelonephritis, and one patient developed decreased blood pressure due to infusion reactions. In one patient in whom the steroid dosage was increased due to poor response to anti-TNF-alpha therapy, brainstem infarction occurred four months later. In one patient, anti-DNA antibody levels increased after therapy, but none of the patients had decreased serum complement levels or increased SLE activity. CONCLUSION In intractable lupus nephritis, anti-TNF-alpha therapy improved urinary protein levels and SLE activity. Although adverse events must be monitored cautiously, it may be possible to use anti-TNF-alpha therapy as a third-line treatment.
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Affiliation(s)
- R Matsumura
- Department of Rheumatology, Allergy and Clinical Immunology of Clinical Research Center, Chiba-East National Hospital, Chiba 260-8712, Japan.
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Naito Y, Matsumoto I, Wakamatsu E, Goto D, Sugiyama T, Matsumura R, Ito S, Tsutsumi A, Sumida T. Muscarinic acetylcholine receptor autoantibodies in patients with Sjögren's syndrome. Ann Rheum Dis 2005; 64:510-1. [PMID: 15708912 PMCID: PMC1755406 DOI: 10.1136/ard.2004.025478] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.3] [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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Abstract
IGF-I is expressed in somatotrophs, and IGF-I receptors are expressed in most somatotrophs and some corticotrophs in the mouse pituitary gland. Our recent study demonstrated that IGF-I stimulates the proliferation of corticotrophs in the mouse pituitary. These results suggested that somatotrophs regulate corticotrophic functions as well as somatotrophic functions by the mediation of IGF-I molecules. The present study aimed to clarify factors regulating pituitary IGF-I expression and also the roles exerted by IGF-I within the mouse anterior pituitary gland. Mouse anterior pituitary cells were isolated and cultured under serum-free conditions. GH (0.5 or 1 microg/ml), ACTH (10(-8) or 10(-7) M), GH-releasing hormone (GHRH; 10(-8) or 10(-7) M), dexamethasone (DEX; 10(-8) or 10(-7) M) and estradiol-17beta (e2; 10(-11) or 10(-9) M) were given for 24 h. IGF-I mRNA levels were measured using competitive RT-PCR, and GH and pro-opiomelanocortin (POMC) mRNA levels were measured using Northern blotting analysis. GH treatment significantly increased IGF-I mRNA levels (1.5- or 2.1-fold). ACTH treatment did not alter GH and IGF-I mRNA levels. IGF-I treatment decreased GH mRNA levels (0.7- or 0.5-fold), but increased POMC mRNA levels (1.8-fold). GH treatment (4 or 8 microg/ml) for 4 days increased POMC mRNA levels. GHRH treatment increased GH mRNA levels (1.3-fold), but not IGF-I mRNA levels. DEX treatment significantly decreased IGF-I mRNA levels (0.8-fold). e2 treatment did not affect IGF-I mRNA levels. GH receptor mRNA, probably with GH-binding protein mRNA, was detected in somatotrophs, and some mammotrophs and gonadotrophs by in situ hybridization using GH receptor cDNA as a probe. These results suggested that IGF-I expression in somatotrophs is regulated by pituitary GH, and that IGF-I suppresses GH expression and stimulates POMC expression at the transcription level. Pituitary IGF-I produced in somatotrophs is probably involved in the regulation of somatotroph and corticotroph functions.
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Affiliation(s)
- J Honda
- Department of Biology, Faculty of Science, Okayama University, Tsushima, Okayama 700-8530, Japan
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Abstract
OBJECTIVES To determine the frequencies of spinocerebellar ataxias (SCAs) in the Kinki district, the western part of the main island of Japan. MATERIAL AND METHODS One hundred and forty-three families with dominantly inherited ataxia and 220 patients with apparently sporadic cerebellar ataxia were examined for the SCA1, SCA2, SCA3/Machado-Joseph disease (MJD), SCA6, SCA7, SCA8, SCA12 and dentatorubral-pallidoluysian atrophy (DRPLA) mutations. RESULTS Among the dominant families, SCA1 accounted for 3%, SCA2 for 4%, SCA3/MJD for 24%, SCA6 for 31% and DRPLA for 12%. Neither SCA7 nor SCA12 mutations were detected. Among the apparently sporadic patients, 15% were found to have expanded triplet repeats. Of these, the SCA6 mutation was most frequently detected. CONCLUSION SCA6 is the most common SCA in the Kinki district of Japan. Comparison of our results with those from other regions of Japan and different countries shows geographic and ethnic variation in the frequency of SCAs.
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Affiliation(s)
- R Matsumura
- Department of Neurology, Nishi-Nara National Hospital, Hichijo, Nara,
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Matsumura R, Umemiya K, Kagami M, Tomioka H, Tanabe E, Sugiyama T, Sueishi M, Kayagaki N, Yagita H, Okumura K. Expression of TNF-related apoptosis inducing ligand (TRAIL) on infiltrating cells and of TRAIL receptors on salivary glands in patients with Sjögren's syndrome. Clin Exp Rheumatol 2002; 20:791-8. [PMID: 12508770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
BACKGROUND Tumor necrosis factor-related apoptosis inducing ligand (TRAIL) induces apoptosis of tumor cells but not normal cells; its role in normal non-transformed tissues is unknown. OBJECTIVE To evaluate the role of apoptosis mediated by TRAIL and TRAIL-receptor (TRAIL-R) system in lymphocytic sialadenitis in patients with Sjögren's syndrome. METHODS The expression of TRAIL and TRAIL-R1, 2, 3 and 4 in lymphocytic sialadenitis was examined by immunoperoxidase staining in patients with Sjögren's syndrome and in normal subjects. To elucidate the mechanism of de novo expression of TRAIL-R1 antigen, we quantitatively investigated its induction by cytokines in human salivary duct cell line (HSG) by cell enzyme-linked immunosorbent assay. In human salivary duct cells stimulated by cytokines, we investigated the induction of apoptotic cell death by recombinant TRAIL protein. RESULTS In patients with massive mononuclear cell infiltration, some infiltrating cells showed TRAIL. In patients with severe lymphocytic sialadenitis, TRAIL-R1, TRAIL-R2, or both were strongly expressed on the ductal epithelial cells. Neither TRAIL-R3 nor R4 were observed on ductal epithelium. In contrast, TRAIL-R1 and R2 were not found in the minor salivary glands of normal subjects or patients with mild lymphocytic sialadenitis. Unstimulated HSG cells did not express TRAIL-R1. Interferon-gamma (IFN-gamma) consistently upregulated levels of TRAIL-R1. In contrast, tumor necrosis factor-alpha (TNF-alpha), interleukin 1-beta (IL-1 beta), IL-2, and IL-4 had no effect on TRAIL-R1 levels. HSG cells expressing TRAIL-R1 in response to IFN-gamma were susceptible to apoptosis by recombinant TRAIL protein. CONCLUSION Our findings suggest that TRAIL and TRAIL-R system may play a role in the pathogenesis of lymphocytic sialadenitis in patients with Sjögren's syndrome.
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Affiliation(s)
- R Matsumura
- Department of Internal Medicine, Toho University School of Medicine, Sakura Hospital, Japan.
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Matsumura R, Umemiya K, Goto T, Nakazawa T, Kagami M, Tomioka H, Tanabe E, Sugiyama T, Sueishi M. Glandular and extraglandular expression of costimulatory molecules in patients with Sjögren's syndrome. Ann Rheum Dis 2001; 60:473-82. [PMID: 11302869 PMCID: PMC1753631 DOI: 10.1136/ard.60.5.473] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVES To investigate the expression and regulation of CD80, CD86, and CD28 costimulatory molecules in sialoadenitis and interstitial nephritis in patients with Sjögren's syndrome (SS). METHODS Expression of CD80, CD86, and CD28 molecules was studied by immunohistochemical staining of lip biopsy specimens obtained from patients who had sialoadenitis associated with SS, and renal biopsy specimens obtained from patients who had interstitial nephritis associated with SS. To elucidate the mechanism of de novo expression of CD80 and CD86 antigens, their induction by cytokines in human salivary duct cell line (HSG) and renal cortical epithelial cells (HRCE) by cell enzyme linked immunosorbent assay (ELISA) was quantitatively investigated. RESULTS In patients with severe sialoadenitis, CD80 and CD86 were strongly expressed on ductal epithelial cells. In contrast, these antigens were not found in the minor salivary glands of normal subjects or of patients with mild sialoadenitis. Some infiltrating cells expressed CD28. In patients who had interstitial nephritis associated with SS, some tubular epithelial cells expressed CD86 but not the CD80 antigen. Unstimulated HSG cells did not express CD80 or CD86. Interferon gamma (IFNgamma) consistently up regulated levels of CD80 and CD86. In contrast, tumour necrosis factor alpha (TNFalpha), interleukin 1beta (IL1beta), IL2, and IL4 had no effect on either CD80 or CD86 levels. Unstimulated HRCE did not express CD80 or CD86. IFNgamma consistently up regulated CD86 expression. No CD80 expression was found on tubular cells. TNFalpha, IL1beta, IL2, and IL4 had no discernible effects. CONCLUSIONS Salivary ductal cells in patients with SS can express CD80 and CD86 costimulatory molecules in response to IFNgamma. Tubular epithelial cells in patients who have interstitial nephritis associated with SS express only CD86 molecules. In patients with SS, salivary ductal cells and tubular epithelial cells may activate infiltrating CD28 positive T lymphocytes by presenting antigens to T cells, potentially leading to tissue destruction.
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Affiliation(s)
- R Matsumura
- Department of Internal Medicine, Toho University School of Medicine, Sakura Hospital, Japan.
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Matsumura R. [Maple syrup urine disease]. Ryoikibetsu Shokogun Shirizu 2001:393-4. [PMID: 11031979] [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: 02/17/2023]
Affiliation(s)
- R Matsumura
- Department of Neurology, Nara Medical University
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Matsumura R. [Carnosinemia]. Ryoikibetsu Shokogun Shirizu 2001:397. [PMID: 11031981] [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: 02/17/2023]
Affiliation(s)
- R Matsumura
- Department of Neurology, Nara Medical University
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Matsumura R. [Homocystinuria]. Ryoikibetsu Shokogun Shirizu 2001:395-6. [PMID: 11031980] [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: 02/17/2023]
Affiliation(s)
- R Matsumura
- Department of Neurology, Nara Medical University
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Matsumura R. [Disorders of the urea cycle]. Ryoikibetsu Shokogun Shirizu 2001:390-2. [PMID: 11031978] [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: 02/17/2023]
Affiliation(s)
- R Matsumura
- Department of Neurology, Nara Medical University
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Matsumura R, Umemiya K, Goto T, Nakazawa T, Ochiai K, Kagami M, Tomioka H, Tanabe E, Sugiyama T, Sueishi M. Interferon gamma and tumor necrosis factor alpha induce Fas expression and anti-Fas mediated apoptosis in a salivary ductal cell line. Clin Exp Rheumatol 2000; 18:311-8. [PMID: 10895367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
BACKGROUND We previously reported that Fas antigen was strongly expressed on salivary duct epithelial cells and that some salivary infiltrating cells showed the Fas ligand in patients with severe sialoadenitis due to Sjögren's syndrome (SS). Apoptotic changes were observed in ductal epithelial cells and some infiltrating cells by DNA nick end labeling methods. These findings suggest that the Fas-Fas ligand system may play a role in the pathogenesis of sialoadenitis in SS. OBJECTIVE To elucidate the mechanism of the de novo expression of ductal Fas antigen in sialoadenitis associated with SS, we investigated the induction of Fas antigen and apoptosis by cytokines in a human salivary duct cell line. METHODS Human salivary duct cell line (HSG) was cultured with interferon gamma (IFN-gamma), tumor necrosis factor alpha (TNF-alpha), interleukin 1 beta (IL-1 beta), interleukin 2 (IL-2), interleukin 4 (IL-4), and granulocyte monocyte colony stimulating factor (GM-CSF). The expression of Fas antigen in HSG was examined by immunoperoxidase cell ELISA. The appearance of DNA strand breaks during apoptosis induced by anti-Fas antibody was detected by DNA nick end labeling methods. RESULTS Unstimulated HSG cells constitutively expressed low levels of Fas antigen. IFN-gamma and TNF-alpha consistently upregulated constitutive levels of Fas. In contrast, IL-1 beta, IL-2, IL-4, and GM-CSF had no effect on Fas levels. HSG cells expressing Fas antigen in response to IFN-gamma or TNF-alpha were susceptible to apoptosis by anti-Fas antibody. CONCLUSION Our findings suggest that IFN-gamma or TNF-alpha secreted by infiltrating lymphocytes induces ductal Fas expression and ductal apoptosis in sialoadenitis associated with SS.
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Affiliation(s)
- R Matsumura
- Department of Internal Medicine, Toho University School of Medicine, Sakura Hospital, Japan
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Matsumura R. [Hyperprolinemia]. Ryoikibetsu Shokogun Shirizu 2000:389. [PMID: 11031977] [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: 02/17/2023]
Affiliation(s)
- R Matsumura
- Department of Neurology, Nara Medical University
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Matsumura R. [Hyperphenylalaninemia]. Ryoikibetsu Shokogun Shirizu 2000:386-8. [PMID: 11031976] [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: 02/17/2023]
Affiliation(s)
- R Matsumura
- Department of Neurology, Nara Medical University
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Mikami C, Ochiai K, Umemiya K, Matsumura R, Kagami M, Tomioka H, Sato Y, Tanabe E. Eosinophil activation and in situ interleukin-5 production by mononuclear cells in skin lesions of patients with drug hypersensitivity. J Dermatol 1999; 26:633-9. [PMID: 10554428 DOI: 10.1111/j.1346-8138.1999.tb02064.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In order to determine the inflammatory mechanisms of skin lesions in patients with drug hypersentivity, we examined eosinophil activation and interleukin-5 (IL-5) production in infiltrating lymphocytes. First, we showed that the number of peripheral eosinophils and the level of serum IL-5 at the eruption-active stage were both significantly higher than those in healed skin eruptions. Histological and immunohistological examination revealed that CD4+ T cells and eosinophils significantly more densely infiltrated drug eruptions than control skin lesions. The infiltrating eosinophils were also shown to be activated by immunostaining using anti-secreted formed eosinophilic cationic protein monoclonal antibody. The expression of mRNA for IL-5 in the infiltrating mononuclear cells at drug eruptions was shown by in situ hybridization. These results suggest that infiltrating CD4+ T cells might regulate both peripheral and tissue eosinophils and facilitate allergic inflammation at drug eruptions by means of IL-5 production.
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Affiliation(s)
- C Mikami
- Department of Dermatology, Toho University School of Medicine, Sakura Hospital, Japan
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Nakao A, Fujii M, Matsumura R, Kumano K, Saito Y, Miyazono K, Iwamoto I. Transient gene transfer and expression of Smad7 prevents bleomycin-induced lung fibrosis in mice. J Clin Invest 1999; 104:5-11. [PMID: 10393693 PMCID: PMC408403 DOI: 10.1172/jci6094] [Citation(s) in RCA: 339] [Impact Index Per Article: 13.6] [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: 01/04/2023] Open
Abstract
TGF-beta plays an important role in lung fibrosis, which is a major cause of suffering and death seen in pulmonary disease. Smad7 has been recently identified as an antagonist of TGF-beta signaling. To investigate whether this novel molecule can be exploited for therapy of lung fibrosis, we determined the effect of exogenous Smad7, introduced by a recombinant human type 5 adenovirus vector, on bleomycin-induced lung fibrosis in mice. C57BL/6 mice with bleomycin-induced lungs received an intratracheal injection of a recombinant adenovirus carrying mice Smad7 cDNA. These mice demonstrated suppression of type I precollagen mRNA, reduced hydroxyproline content, and no morphological fibrotic responses in the lungs when compared with mice administered adenovirus carrying Smad6 cDNA. In addition, we found that expression of Smad7 transgene blocked Smad2 phosphorylation induced by bleomycin in mouse lungs. These data indicated that gene transfer of Smad7 (but not Smad6) prevented bleomycin-induced lung fibrosis, suggesting that Smad7 may have applicability in the treatment of pulmonary fibrosis.
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Affiliation(s)
- A Nakao
- Department of Medicine II, Chiba University, School of Medicine, Chiba 260-0856, Japan.
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Sato T, Oyake M, Nakamura K, Nakao K, Fukusima Y, Onodera O, Igarashi S, Takano H, Kikugawa K, Ishida Y, Shimohata T, Koide R, Ikeuchi T, Tanaka H, Futamura N, Matsumura R, Takayanagi T, Tanaka F, Sobue G, Komure O, Takahashi M, Sano A, Ichikawa Y, Goto J, Kanazawa I. Transgenic mice harboring a full-length human mutant DRPLA gene exhibit age-dependent intergenerational and somatic instabilities of CAG repeats comparable with those in DRPLA patients. Hum Mol Genet 1999; 8:99-106. [PMID: 9887337 DOI: 10.1093/hmg/8.1.99] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Dentatorubral-pallidoluysian atrophy (DRPLA) is one among an increasing number of hereditary neurodegenerative diseases determined as being caused by unstable expansion of CAG repeats coding for polyglutamine stretches. To investigate the molecular mechanisms underlying CAG repeat instability, we established three transgenic lines each harboring a single copy of a full-length human mutant DRPLA gene carrying a CAG repeat expansion. These transgenic mice exhibited an age-dependent increase (+0.31 per year) in male transmission and an age-dependent contraction (-1.21 per year) in female transmission. Similar tendencies in intergenerational instabilities were also observed in human DRPLA parent-offspring pairs. The intergenerational instabilities of the CAG repeats may be interpreted as being derived from the instability occurring during continuous cell division of spermatogonia in the male, and that occurring during the period of meiotic arrest in the female. The transgenic mice also exhibited an age-dependent increase in the degree of somatic mosaicism which occurred in a cell lineage-dependent manner, with the size range of CAG repeats being smaller in the cerebellum than in other tissues including the cerebrum, consistent with observations in autopsied tissues of DRPLA patients. Thus, the transgenic mice described in this study exhibited age-dependent intergenerational as well as somatic instabilities of expanded CAG repeats comparable with those observed in human DRPLA patients, and are therefore expected to serve as good models for investigating the molecular mechanisms of instabilities of CAG repeats.
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Affiliation(s)
- T Sato
- Department of Neurology, Brain Research Institute, Niigata University, 1 Asahimachi, Niigata 951-8585, Japan
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