1
|
Miyamura Y, Nishikino T, Koiwa H, Homma M, Kojima S. Roles of linker region flanked by transmembrane and peptidoglycan binding region of PomB in energy conversion of the Vibrio flagellar motor. Genes Cells 2024; 29:282-289. [PMID: 38351850 DOI: 10.1111/gtc.13102] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 01/26/2024] [Accepted: 01/28/2024] [Indexed: 04/04/2024]
Abstract
The flagellar components of Vibrio spp., PomA and PomB, form a complex that transduces sodium ion and contributes to rotate flagella. The transmembrane protein PomB is attached to the basal body T-ring by its periplasmic region and has a plug segment following the transmembrane helix to prevent ion flux. Previously we showed that PomB deleted from E41 to R120 (Δ41-120) was functionally comparable to the full-length PomB. In this study, three deletions after the plug region, PomB (Δ61-120), PomB (Δ61-140), and PomB (Δ71-150), were generated. PomB (Δ61-120) conferred motility, whereas the other two mutants showed almost no motility in soft agar plate; however, we observed some swimming cells with speed comparable for the wild-type cells. When the two PomB mutants were introduced into a wild-type strain, the swimming ability was not affected by the mutant PomBs. Then, we purified the mutant PomAB complexes to confirm the stator formation. When plug mutations were introduced into the PomB mutants, the reduced motility by the deletion was rescued, suggesting that the stator was activated. Our results indicate that the deletions prevent the stator activation and the linker and plug regions, from E41 to S150, are not essential for the motor function of PomB but are important for its regulation.
Collapse
Affiliation(s)
- Yusuke Miyamura
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
| | - Tatsuro Nishikino
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Nagoya, Japan
| | - Hiroaki Koiwa
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
| | - Michio Homma
- Division of Material Science and Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
| | - Seiji Kojima
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
| |
Collapse
|
2
|
Uesaka K, Inaba K, Nishioka N, Kojima S, Homma M, Ihara K. Deciphering the genomes of motility-deficient mutants of Vibrio alginolyticus 138-2. PeerJ 2024; 12:e17126. [PMID: 38515459 PMCID: PMC10956519 DOI: 10.7717/peerj.17126] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 02/27/2024] [Indexed: 03/23/2024] Open
Abstract
The motility of Vibrio species plays a pivotal role in their survival and adaptation to diverse environments and is intricately associated with pathogenicity in both humans and aquatic animals. Numerous mutant strains of Vibrio alginolyticus have been generated using UV or EMS mutagenesis to probe flagellar motility using molecular genetic approaches. Identifying these mutations promises to yield valuable insights into motility at the protein structural physiology level. In this study, we determined the complete genomic structure of 4 reference specimens of laboratory V. alginolyticus strains: a precursor strain, V. alginolyticus 138-2, two strains showing defects in the lateral flagellum (VIO5 and YM4), and one strain showing defects in the polar flagellum (YM19). Subsequently, we meticulously ascertained the specific mutation sites within the 18 motility-deficient strains related to the polar flagellum (they fall into three categories: flagellar-deficient, multi-flagellar, and chemotaxis-deficient strains) by whole genome sequencing and mapping to the complete genome of parental strains VIO5 or YM4. The mutant strains had an average of 20.6 (±12.7) mutations, most of which were randomly distributed throughout the genome. However, at least two or more different mutations in six flagellar-related genes were detected in 18 mutants specifically selected as chemotaxis-deficient mutants. Genomic analysis using a large number of mutant strains is a very effective tool to comprehensively identify genes associated with specific phenotypes using forward genetics.
Collapse
Affiliation(s)
- Kazuma Uesaka
- Center for Gene Research, Nagoya University, Nagoya, Aichi, Japan
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi, Japan
| | - Keita Inaba
- Center for Gene Research, Nagoya University, Nagoya, Aichi, Japan
| | - Noriko Nishioka
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Aichi, Japan
| | - Seiji Kojima
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Aichi, Japan
| | - Michio Homma
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Aichi, Japan
- Division of Material Science, Graduate School of Science, Nagoya University, Nagoya, Aichi, Japan
| | - Kunio Ihara
- Center for Gene Research, Nagoya University, Nagoya, Aichi, Japan
| |
Collapse
|
3
|
Suzuki K, Hama A, Okuno Y, Xu Y, Narita A, Yoshida N, Muramatsu H, Nishio N, Kato K, Kojima S, Yoo KH, Takahashi Y. A retrospective analysis of gene fusions and treatment outcomes in pediatric acute megakaryoblastic leukemia without Down syndrome. Haematologica 2024. [PMID: 38299674 DOI: 10.3324/haematol.2023.283760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2024] [Indexed: 02/02/2024] Open
Abstract
Not available.
Collapse
Affiliation(s)
- Kyogo Suzuki
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Aichi
| | - Asahito Hama
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Aichi
| | - Yusuke Okuno
- Department of Virology, Nagoya City University Graduate School of Medical Sciences, Aichi
| | - Yinyan Xu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Aichi
| | - Atsushi Narita
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Aichi
| | - Nao Yoshida
- Department of Hematology and Oncology, Children's Medical Center, Japanese Red Cross Aichi Medical Center Nagoya First Hospital, Aichi
| | - Hideki Muramatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Aichi
| | - Nobuhiro Nishio
- Department of Advanced Medicine, Nagoya University Hospital, Aichi
| | - Koji Kato
- Department of Hematology and Oncology, Children's Medical Center, Japanese Red Cross Aichi Medical Center Nagoya First Hospital, Aichi
| | - Seiji Kojima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Aichi
| | - Keon Hee Yoo
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
| | - Yoshiyuki Takahashi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Aichi.
| |
Collapse
|
4
|
Kojima S. Poisson's Ratio of Glasses, Ceramics, and Crystals. Materials (Basel) 2024; 17:300. [PMID: 38255468 PMCID: PMC10817342 DOI: 10.3390/ma17020300] [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: 11/16/2023] [Revised: 01/04/2024] [Accepted: 01/04/2024] [Indexed: 01/24/2024]
Abstract
Poisson's ratio is the fundamental metric used to discuss the performance of any material when strained elastically. However, the methods of the determination of Poisson's ratio are not yet discussed well. The first purpose of this paper is to introduce the five kinds of typical experimental methods to measure Poisson's ratio of glasses, ceramics, and crystals. The second purpose is to discuss the experimental results on the variation of Poisson's ratio by composition, temperature, and pressure reviewed for various glasses, ceramics, and crystals, which are not yet reviewed. For example, in oxide glasses, the number of bridging oxygen atoms per glass-forming cation provides a straightforward estimation of network crosslinking using Poisson's ratio. In the structural-phase transition of crystals, Poisson's ratio shows remarkable temperature-dependence in the vicinity of a phase-transition temperature. The mechanism of these variations is discussed from physical and chemical points of view. The first-principles calculation of Poisson's ratio in the newly hypothesized compounds is also described, and its pressure-induced ductile-brittle transition is discussed.
Collapse
Affiliation(s)
- Seiji Kojima
- Division of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
| |
Collapse
|
5
|
Yamashita D, Muramatsu H, Narita A, Wakamatsu M, Tsumura Y, Sajiki D, Maemura R, Yamamori A, Imaya M, Narita K, Kataoka S, Taniguchi R, Nishio N, Okuno Y, Fujita N, Koh K, Umeda K, Morihana E, Iwafuchi H, Ito M, Kojima S, Hama A, Takahashi Y. Hematological abnormalities in Jacobsen syndrome: cytopenia of varying severities and morphological abnormalities in peripheral blood and bone marrow. Haematologica 2023; 108:3438-3443. [PMID: 37317839 PMCID: PMC10690895 DOI: 10.3324/haematol.2022.282513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 06/07/2023] [Indexed: 06/16/2023] Open
Abstract
Not available.
Collapse
Affiliation(s)
- Daiki Yamashita
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Hideki Muramatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya.
| | - Atsushi Narita
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Manabu Wakamatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Yusuke Tsumura
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Daichi Sajiki
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Ryo Maemura
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Ayako Yamamori
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Masayuki Imaya
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Kotaro Narita
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Shinsuke Kataoka
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Rieko Taniguchi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Nobuhiro Nishio
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Yusuke Okuno
- Department of Virology, Nagoya City University Graduate School of Medical Sciences, Nagoya
| | - Naoto Fujita
- Department of Pediatrics, Hiroshima Red Cross Hospital and Atomic-Bomb Survivors Hospital, Hiroshima
| | - Katsuyoshi Koh
- Department of Hematology/Oncology, Saitama Children's Medical Center, Saitama
| | - Katsutsugu Umeda
- Department of Pediatrics, Graduate School of Medicine, Kyoto University, Kyoto
| | - Eiji Morihana
- Department of Pediatric Cardiology, Aichi Children's Health and Medical Center, Obu
| | - Hideto Iwafuchi
- Department of Pathology, Shizuoka Children's Hospital, Shizuoka
| | - Masafumi Ito
- Department of Pathology, Japanese Red Cross Aichi Medical Center Nagoya First Hospital, Nagoya
| | - Seiji Kojima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Asahito Hama
- Department of Hematology and Oncology, Children's Medical Center, Japanese Red Cross Aichi Medical Center Nagoya First Hospital, Nagoya
| | - Yoshiyuki Takahashi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya.
| |
Collapse
|
6
|
Takagi M, Hoshino A, Bousset K, Röddecke J, Martin HL, Folcut I, Tomomasa D, Yang X, Kobayashi J, Sakata N, Yoshida K, Miyano S, Ogawa S, Kojima S, Morio T, Dörk T, Kanegane H. Bone Marrow Failure and Immunodeficiency Associated with Human RAD50 Variants. J Clin Immunol 2023; 43:2136-2145. [PMID: 37794136 DOI: 10.1007/s10875-023-01591-8] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 09/20/2023] [Indexed: 10/06/2023]
Abstract
PURPOSE The MRE11-RAD50-NBN (MRN) complex plays a key role in recognizing and signaling DNA double-strand breaks. Pathogenic variants in NBN and MRE11 give rise to the autosomal-recessive diseases, Nijmegen breakage syndrome (NBS) and ataxia telangiectasia-like disorder, respectively. The clinical consequences of pathogenic variants in RAD50 are incompletely understood. We aimed to characterize a newly identified RAD50 deficiency/NBS-like disorder (NBSLD) patient with bone marrow failure and immunodeficiency. METHODS We report on a girl with microcephaly, mental retardation, bird-like face, short stature, bone marrow failure and B-cell immunodeficiency. We searched for candidate gene by whole-exome sequencing and analyzed the cellular phenotype of patient-derived fibroblasts using immunoblotting, radiation sensitivity assays and lentiviral complementation experiments. RESULTS Compound heterozygosity for two variants in the RAD50 gene (p.Arg83His and p.Glu485Ter) was identified in this patient. The expression of RAD50 protein and MRN complex formation was maintained in the cells derived from this patient. DNA damage-induced activation of the ATM kinase was markedly decreased, which was restored by the expression of wild-type (WT) RAD50. Radiosensitivity appeared inconspicuous in the patient-derived cell line as assessed by colony formation assay. The RAD50R83H missense substitution did not rescue the mitotic defect in complementation experiments using RAD50-deficient fibroblasts, whereas RAD50WT did. The RAD50E485X nonsense variant was associated with in-frame skipping of exon 10 (p.Glu485_545del). CONCLUSION These findings indicate important roles of RAD50 in human bone marrow and immune cells. RAD50 deficiency/NBSLD can manifest as a distinct inborn error of immunity characterized by bone marrow failure and B-cell immunodeficiency.
Collapse
Affiliation(s)
- Masatoshi Takagi
- Department of Pediatrics and Developmental Biology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
- Department of Community Pediatrics, Perinatal and Maternal Medicine, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Akihiro Hoshino
- Department of Pediatrics and Developmental Biology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
- Department of Pediatrics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Kristine Bousset
- Gynaecology Research Unit, Hannover Medical School, 30625, Hannover, Germany
| | - Jule Röddecke
- Gynaecology Research Unit, Hannover Medical School, 30625, Hannover, Germany
| | - Hanna Luisa Martin
- Gynaecology Research Unit, Hannover Medical School, 30625, Hannover, Germany
| | - Iulia Folcut
- Gynaecology Research Unit, Hannover Medical School, 30625, Hannover, Germany
| | - Dan Tomomasa
- Department of Pediatrics and Developmental Biology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Xi Yang
- Department of Pediatrics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
- Division of Immunology, Children's Hospital of Chongqing Medical University, Chongqing, China
| | - Junya Kobayashi
- Department of Genome Repair Dynamics, Radiation Biology Center, Kyoto University, Kyoto, Japan
| | - Naoki Sakata
- Department of Pediatrics, Kindai University Faculty of Medicine, Osaka-Sayama, Japan
| | - Kenichi Yoshida
- Department of Pathology and Tumor Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Satoru Miyano
- Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Seishi Ogawa
- Department of Pathology and Tumor Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Seiji Kojima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Tomohiro Morio
- Department of Pediatrics and Developmental Biology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Thilo Dörk
- Gynaecology Research Unit, Hannover Medical School, 30625, Hannover, Germany.
| | - Hirokazu Kanegane
- Department of Child Health and Development, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8519, Japan.
| |
Collapse
|
7
|
Tsumura Y, Muramatsu H, Tetsuka N, Imaizumi T, Sato K, Inoue K, Motomura Y, Cho Y, Yamashita D, Sajiki D, Maemura R, Yamamori A, Imaya M, Wakamatsu M, Narita K, Kataoka S, Hamada M, Taniguchi R, Nishikawa E, Narita A, Nishio N, Kojima S, Hoshino Y, Takahashi Y. A Japanese retrospective study of non-tuberculous mycobacterial infection in children, adolescents, and young adult patients with hematologic-oncologic diseases. Haematologica 2023. [PMID: 37881854 DOI: 10.3324/haematol.2023.283636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Indexed: 10/27/2023] Open
Abstract
Non-tuberculous mycobacterial infection (NTM) is rare in healthy children, with lymphadenitis being the most common presentation. Immunocompromised populations are known to be at high risk, but the clinical picture of NTM infection in pediatric hematology/oncology patients is unclear. In this nationwide retrospective analysis of patients under the age of 40 treated in Japanese pediatric hematology/oncology departments who developed NTM infection between January 2010 and December 2020, 36 patients (21 patients with hematopoietic stem cell transplantation (HSCT) and 15 nontransplant patients) were identified. Post-transplant patients were infected with NTM at 24 sites, including the lungs (n = 12), skin and soft tissues (n = 6), bloodstream (n = 4), and others (n = 2). Nine of twelve patients with pulmonary NTM infection had a history of pulmonary graft-versus-host disease (GVHD), and rapid-growing mycobacteria (RGM) were isolated from five of them. In nontransplant patients, the primary diseases were acute lymphoblastic leukemia (ALL; n = 5), inborn errors of immunity (IEI; n = 6), and others (n = 4). All cases of ALL had bloodstream infections with RGM, whereas all cases of IEI were infected with slow-growing mycobacteria (SGM). In summary, three typical clinical scenarios for pediatric hematology/oncology patients have been established: RGM-induced pulmonary disease in patients with pulmonary GVHD, RGM bloodstream infection in patients with ALL, and SGM infection in patients with IEI. Our findings suggest that NTM must be regarded as a pathogen for infections in these high-risk patients, especially those with pulmonary GVHD, who may require active screening for NTM.
Collapse
Affiliation(s)
- Yusuke Tsumura
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Hideki Muramatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya.
| | - Nobuyuki Tetsuka
- Department of Infection Control, Gifu University Graduate School of Medicine, Gifu
| | | | - Kikue Sato
- Medical IT Center, Nagoya University Hospital, Nagoya
| | - Kento Inoue
- Department of Pediatrics and Developmental Biology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo
| | - Yoshitomo Motomura
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka
| | - Yuko Cho
- Department of Pediatrics, Hokkaido University Hospital, Sapporo
| | - Daiki Yamashita
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Daichi Sajiki
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Ryo Maemura
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Ayako Yamamori
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Masayuki Imaya
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Manabu Wakamatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Kotaro Narita
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Shinsuke Kataoka
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Motoharu Hamada
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Rieko Taniguchi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Eri Nishikawa
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Atsushi Narita
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Nobuhiro Nishio
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Seiji Kojima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Yoshihiko Hoshino
- Department of Mycobacteriology, Leprosy Research Center, National Institute of Infectious Diseases, Tokyo
| | - Yoshiyuki Takahashi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya.
| |
Collapse
|
8
|
Furukawa T, Kodama H, Ishii H, Kojima S, Nakajima T, Gan W, Velayutham T, Majid WA. Towards comprehensive understanding of piezoelectricity and its relaxation in VDF-based ferroelectric polymers. POLYMER 2023; 283:126235. [DOI: 10.1016/j.polymer.2023.126235] [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: 09/02/2023]
|
9
|
Nishikino T, Hijikata A, Kojima S, Shirai T, Kainosho M, Homma M, Miyanoiri Y. Changes in the hydrophobic network of the FliG MC domain induce rotational switching of the flagellar motor. iScience 2023; 26:107320. [PMID: 37520711 PMCID: PMC10372836 DOI: 10.1016/j.isci.2023.107320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 04/18/2023] [Accepted: 07/04/2023] [Indexed: 08/01/2023] Open
Abstract
The FliG protein plays a pivotal role in switching the rotational direction of the flagellar motor between clockwise and counterclockwise. Although we previously showed that mutations in the Gly-Gly linker of FliG induce a defect in switching rotational direction, the detailed molecular mechanism was not elucidated. Here, we studied the structural changes in the FliG fragment containing the middle and C-terminal regions, named FliGMC, and the switch-defective FliGMC-G215A, using nuclear magnetic resonance (NMR) and molecular dynamics simulations. NMR analysis revealed multiple conformations of FliGMC, and the exchange process between these conformations was suppressed by the G215A residue substitution. Furthermore, changes in the intradomain orientation of FliG were induced by changes in hydrophobic interaction networks throughout FliG. Our finding applies to FliG in a ring complex in the flagellar basal body, and clarifies the switching mechanism of the flagellar motor.
Collapse
Affiliation(s)
- Tatsuro Nishikino
- Laboratory for Ultra-High Magnetic Field NMR Spectroscopy, Research Center for Next-Generation Protein Sciences, Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Atsushi Hijikata
- Department of Bioscience, Nagahama Institute of Bio-Science and Technology, 1266 Tamura, Nagahama, Shiga 526-0829, Japan
| | - Seiji Kojima
- Division of Biological Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| | - Tsuyoshi Shirai
- Department of Bioscience, Nagahama Institute of Bio-Science and Technology, 1266 Tamura, Nagahama, Shiga 526-0829, Japan
| | - Masatsune Kainosho
- Graduate School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
- Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397, Japan
| | - Michio Homma
- Division of Biological Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
- Department of Physics, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| | - Yohei Miyanoiri
- Laboratory for Ultra-High Magnetic Field NMR Spectroscopy, Research Center for Next-Generation Protein Sciences, Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka 565-0871, Japan
- Graduate School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| |
Collapse
|
10
|
Vallero C, Ahart M, Tkachev S, Chariton S, Prakapenka V, Kojima S, Gramsch SA, Hemley RJ. Acoustic properties, elasticity, and equation of state of glycerol under pressure. J Chem Phys 2023; 159:064506. [PMID: 37551808 DOI: 10.1063/5.0152093] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 07/10/2023] [Indexed: 08/09/2023] Open
Abstract
We employed high-pressure Brillouin scattering to study the pressure dependencies of acoustic modes of glycerol up to 14 GPa at 300 K. We observed longitudinal acoustic velocities and transverse acoustic velocities for the first time from 5 to 14 GPa. The results allow the determination of a complete set of elastic properties and an accurate determination of the pressure-volume (P-V) equation of state (EOS). EOS parameters, K0 = 14.9 ± 1.8 GPa and K'0 = 5.6 ± 0.5, were determined from fits to the data from ambient pressure to 14 GPa. Direct volume measurements of the P-V EOS are consistent with those determined by Brillouin scattering. A deviation from a Cauchy-like relationship for elastic properties was observed, and the pressure dependencies of the photoelastic constants and relaxation times were documented from 5 to 14 GPa. These results have broad implications for glass-forming liquids, viscoelastic theory, and mode coupling theory.
Collapse
Affiliation(s)
- Cade Vallero
- Department of Physics, University of Illinois Chicago, Chicago, Illinois 60607, USA
| | - Muhtar Ahart
- Department of Physics, University of Illinois Chicago, Chicago, Illinois 60607, USA
| | - Sergey Tkachev
- GSECARS, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60334, USA
| | - Stella Chariton
- GSECARS, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60334, USA
| | - Vitali Prakapenka
- GSECARS, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60334, USA
| | - Seiji Kojima
- Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
| | - Stephen A Gramsch
- Department of Chemistry, University of Illinois Chicago, Chicago, Illinois 60607, USA
| | - Russell J Hemley
- Department of Physics, University of Illinois Chicago, Chicago, Illinois 60607, USA
- Department of Chemistry, University of Illinois Chicago, Chicago, Illinois 60607, USA
- Department of Earth and Environmental Sciences, University of Illinois Chicago, Chicago, Illinois 60607, USA
| |
Collapse
|
11
|
Watanabe A, Fujii M, Sano T, Ikegami S, Kamei J, Kojima S, Satake Y, Yamada T. Tracheal leiomyoma. QJM 2023; 116:563-565. [PMID: 36944268 DOI: 10.1093/qjmed/hcad044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 03/15/2023] [Indexed: 03/23/2023] Open
Affiliation(s)
- A Watanabe
- Department of Respiratory Medicine, Shizuoka City Shizuoka Hospital, Shizuoka, Japan
| | - M Fujii
- Department of Respiratory Medicine, Shizuoka City Shizuoka Hospital, Shizuoka, Japan
| | - T Sano
- Department of Respiratory Medicine, Shizuoka City Shizuoka Hospital, Shizuoka, Japan
| | - S Ikegami
- Department of Otolaryngology, Head and Neck Surgery, Shizuoka City Shizuoka Hospital, Shizuoka, Japan
| | - J Kamei
- Department of Respiratory Medicine, Shizuoka City Shizuoka Hospital, Shizuoka, Japan
| | - S Kojima
- Department of Respiratory Medicine, Shizuoka City Shizuoka Hospital, Shizuoka, Japan
| | - Y Satake
- Department of Respiratory Medicine, Shizuoka City Shizuoka Hospital, Shizuoka, Japan
| | - T Yamada
- Department of Respiratory Medicine, Shizuoka City Shizuoka Hospital, Shizuoka, Japan
| |
Collapse
|
12
|
Monira M, Helal MA, Liton MNH, Kamruzzaman M, Kojima S. Elastic, optoelectronic and photocatalytic properties of semiconducting CsNbO 3: first principles insights. Sci Rep 2023; 13:10246. [PMID: 37353553 DOI: 10.1038/s41598-023-36875-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 06/12/2023] [Indexed: 06/25/2023] Open
Abstract
The cubic phase of CsNbO3 (CNO) perovskite has been hypothesized to investigate the elastic, electronic, photocatalytic, and optical properties for various technological applications using first-principles method. The pressure dependent structural stability has been confirmed from computed elastic constants. Relatively high value of elastic moduli, large hardness and toughness suggested that CNO would be applicable to design industrial machineries. The ductile to brittle transition is noticed at 20 GPa. The indirect bandgap of CNO proclaims its suitability for photovoltaic and IR photodetector applications. The total and partial density of states are calculated to show in evidence the contribution of individual atomic orbitals in the formation of bands. The pressure changes orbitals hybridization which can be substantiated by the change in the bandgap. Strong covalency of the Nb-O bond and antibonding character of Cs-O have been anticipated by the Mulliken population analysis and by the contour maps of electron charge density. The low carrier effective mass and high mobility carriers predict the good electrical conductivity of the material. The calculated values of conduction and valance band edge potential illustrate the excellent water-splitting and environmental pollutants degradation properties of CNO.
Collapse
Affiliation(s)
- M Monira
- Department of Physics, Begum Rokeya University, Rangpur, Rangpur, 5400, Bangladesh.
| | - M A Helal
- Department of Physics, Begum Rokeya University, Rangpur, Rangpur, 5400, Bangladesh.
| | - M N H Liton
- Department of Physics, Begum Rokeya University, Rangpur, Rangpur, 5400, Bangladesh
- Department of Physics, University of Rajshahi, Rajshahi, 6400, Bangladesh
| | - M Kamruzzaman
- Department of Physics, Begum Rokeya University, Rangpur, Rangpur, 5400, Bangladesh
| | - S Kojima
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8573, Japan
| |
Collapse
|
13
|
Takahashi K, Nishikino T, Kajino H, Kojima S, Uchihashi T, Homma M. Ring formation by Vibrio fusion protein composed of FliF and FliG, MS-ring and C-ring component of bacterial flagellar motor in membrane. Biophys Physicobiol 2023; 20:e200028. [PMID: 38496245 PMCID: PMC10941966 DOI: 10.2142/biophysico.bppb-v20.0028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 06/05/2023] [Indexed: 03/19/2024] Open
Abstract
The marine bacterium Vibrio alginolyticus has a single flagellum as a locomotory organ at the cell pole, which is rotated by the Na+-motive force to swim in a liquid. The base of the flagella has a motor composed of a stator and rotor, which serves as a power engine to generate torque through the rotor-stator interaction coupled to Na+ influx through the stator channel. The MS-ring, which is embedded in the membrane at the base of the flagella as part of the rotor, is the initial structure required for flagellum assembly. It comprises 34 molecules of the two-transmembrane protein FliF. FliG, FliM, and FliN form a C-ring just below the MS-ring. FliG is an important rotor protein that interacts with the stator PomA and directly contributes to force generation. We previously found that FliG promotes MS-ring formation in E. coli. In the present study, we constructed a fliF-fliG fusion gene, which encodes an approximately 100 kDa protein, and the successful production of this protein effectively formed the MS-ring in E. coli cells. We observed fuzzy structures around the ring using either electron microscopy or high-speed atomic force microscopy (HS-AFM), suggesting that FliM and FliN are necessary for the formation of a stable ring structure. The HS-AFM movies revealed flexible movements at the FliG region.
Collapse
Affiliation(s)
- Kanji Takahashi
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - Tatsuro Nishikino
- Institute for protein research, Osaka University, Suita, Osaka 565-0871, Japan
- Present address: Department of Materials Science and Engineering, Nagoya Institute of Technology, Nagoya Aichi 466-8555, Japan
| | - Hiroki Kajino
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - Seiji Kojima
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - Takayuki Uchihashi
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
- Institute for Glyco-core Research (iGCORE), Nagoya University, Nagoya, Aichi 464-0814, Japan
- Department of Creative Research, Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences, Okazaki, Aichi 444-8787, Japan
| | - Michio Homma
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
| |
Collapse
|
14
|
Al-Kzayer LFY, Saeed RM, Ghali HH, Tanaka M, Al-Jadiry MF, Faraj SA, Al-Hadad SA, Al Abdullah HMS, Majeed AA, Qadir AO, Abdullah DA, Noori KD, Hama ZM, Muhsin AA, Al-Doski AA, Al-Agele YS, Malallah AH, Al-Badrani KS, Khaleel AMA, Kamata M, Hamada M, Kojima S, Nakazawa Y, Okuno Y. Comprehensive genetic analyses of childhood acute leukemia in Iraq using next-generation sequencing. Transl Pediatr 2023; 12:827-844. [PMID: 37305720 PMCID: PMC10248931 DOI: 10.21037/tp-22-512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 03/15/2023] [Indexed: 06/13/2023] Open
Abstract
Background Molecular analyses in hematological malignancies provide insights about genetic makeup. Probable etiological factors in leukemogenesis could also be disclosed. Since genetic analyses are still primitive in Iraq, a country of repeated wars, we conceived of performing next-generation sequencing (NGS), to disclose the genomic landscape of acute lymphoblastic leukemia (ALL) and acute myeloid leukemia (AML) among a cohort of Iraqi children. Methods Dried blood samples were collected from Iraqi children with ALL (n=55), or AML (n=11), and transferred to Japan where NGS was done. Whole-exome, whole-genome, and targeted gene sequencings were performed. Results Somatic point mutations and the copy number variations among Iraqi children with acute leukemia were comparable with those in other countries, and cytosine-to-thymine nucleotide alterations were dominant. Strikingly, TCF3-PBX1 was the most recurrent fusion gene (22.4%) in B-cell precursor ALL (B-ALL), and acute promyelocytic leukemia (AML-M3) was subtyped in 5 AML cases. Additionally, a high frequency of RAS signaling pathway mutations was detected in children with B-ALL (38.8%), along with 3 AML cases that carried oncogenic RAS. Conclusions Apart from disclosing the high frequency of TCF3-PBX1, NGS confirmed our previous finding of recurrent RAS mutations in Iraqi childhood acute leukemia. Our results suggest that the biology of Iraqi childhood acute leukemia is in part characteristic, where the war-aftermath environment or geography might play a role.
Collapse
Affiliation(s)
| | - Raghad M. Saeed
- Department of Pediatric Oncology, Children Welfare Teaching Hospital, Baghdad Medical City, Baghdad, Iraq
| | - Hasanein Habeeb Ghali
- Department of Pediatric Oncology, Children Welfare Teaching Hospital, Baghdad Medical City, Baghdad, Iraq
- Department of Pediatrics, College of Medicine, Baghdad University, Baghdad Medical City, Baghdad, Iraq
| | - Miyuki Tanaka
- Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan
| | - Mazin F. Al-Jadiry
- Department of Pediatric Oncology, Children Welfare Teaching Hospital, Baghdad Medical City, Baghdad, Iraq
- Department of Pediatrics, College of Medicine, Baghdad University, Baghdad Medical City, Baghdad, Iraq
| | - Safa A. Faraj
- Department of Pediatric Oncology, Children Welfare Teaching Hospital, Baghdad Medical City, Baghdad, Iraq
- Department of Pediatrics, College of Medicine, Wasit University, Al Kut, Iraq
| | - Salma A. Al-Hadad
- Department of Pediatric Oncology, Children Welfare Teaching Hospital, Baghdad Medical City, Baghdad, Iraq
- Department of Pediatrics, College of Medicine, Baghdad University, Baghdad Medical City, Baghdad, Iraq
| | | | - Athar A. Majeed
- Department of Pediatric Oncology, Basra Children’s Specialty Hospital, Basra, Iraq
| | - Ali Omer Qadir
- Department of Pediatric Hematology and Oncology, Hiwa Cancer Hospital, Sulaymaniyah, Iraq
| | - Dana Ahmed Abdullah
- Department of Hematopathology, Hiwa Cancer Hospital, Sulaymaniyah, Iraq
- Department of Pathology, College of Medicine, University of Sulaimani, Sulaymaniyah, Iraq
| | - Kani Dlawar Noori
- Department of Hematopathology, Hiwa Cancer Hospital, Sulaymaniyah, Iraq
| | | | - Abdulrahman A. Muhsin
- Department of Medical Laboratories, College of Health Science, University of Duhok, Duhok, Iraq
| | - Adnan Anwer Al-Doski
- Department of Hematopathology, College of Medicine, University of Duhok, Duhok, Iraq
| | - Yasir S. Al-Agele
- Department of Pediatric Oncology, Ibn Al-Atheer Hospital for Children, Mosul, Iraq
| | | | | | - Asmaa M. A. Khaleel
- Department of Hematopathology, Ibn Al-Atheer Hospital for Children, Mosul, Iraq
| | - Minoru Kamata
- Japan Chernobyl Foundation (JCF) NPO, Matsumoto, Japan
| | - Motoharu Hamada
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Seiji Kojima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yozo Nakazawa
- Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan
| | - Yusuke Okuno
- Department of Virology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
- Medical Genomics Centre, Nagoya University Hospital, Nagoya, Japan
| |
Collapse
|
15
|
Fukushima Y, Homma M, Kojima S. Interaction of FlhF, SRP-like GTPase with FliF, MS ring component assembling the initial structure of flagella in marine Vibrio. J Biochem 2023:7109769. [PMID: 37021788 DOI: 10.1093/jb/mvad029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/15/2023] [Indexed: 04/07/2023] Open
Abstract
Vibrio alginolyticus forms a single flagellum at its cell pole. FlhF and FlhG are known to be the main proteins responsible for the polar formation of single flagellum. MS-ring formation in the flagellar basal body appears to be an initiation step for flagellar assembly. The MS-ring is formed by a single protein, FliF, which has two transmembrane (TM) segments and a large periplasmic region. We had shown that FlhF was required for the polar localization of Vibrio FliF, and FlhF facilitated MS-ring formation when FliF was overexpressed in E. coli cells. These results suggest that FlhF interacts with FliF to facilitate MS-ring formation. Here, we attempted to detect this interaction using Vibrio FliF fragments fused to a tag of Glutathione S-transferase (GST) in E. coli. We found that the N-terminal 108 residues of FliF, including the first TM segment and the periplasmic region, could pull FlhF down. In the first step, Signal Recognition Particle (SRP) and its receptor are involved in the transport of membrane proteins to target them, which delivers them to the translocon. FlhF may have a similar or enhanced function as SRP, which binds to a region rich in hydrophobic residues.
Collapse
Affiliation(s)
- Yuria Fukushima
- Division of Biological Science, Graduate School of Science, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan
| | - Michio Homma
- Division of Biological Science, Graduate School of Science, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan
| | - Seiji Kojima
- Division of Biological Science, Graduate School of Science, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan
| |
Collapse
|
16
|
Kojima S, Aftabuzzaman M, Dec J, Kleemann W. Brillouin Scattering Study of Ferroelectric Instability of Calcium-Strontium-Barium Niobate Single Crystals. Materials (Basel) 2023; 16:2502. [PMID: 36984380 PMCID: PMC10052114 DOI: 10.3390/ma16062502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/16/2023] [Accepted: 03/19/2023] [Indexed: 06/18/2023]
Abstract
Uniaxial ferroelectrics with tetragonal tungsten bronze structure are important functional materials with photorefractive, electrooptic, piezoelectric, and pyroelectric properties. SrxBa1-xNb2O6 (SBN100x) with x > 50 is known as a typical uniaxial relaxor ferroelectric, while CaxBa1-xNb2O6 (CBN100x) undergoes nearly normal ferroelectric phase transitions. Single crystals of CSBN100x = [x(CBN28) + (1 - x) (SBN61)] = xCa0.28Ba0.72Nb2O6 + (1 - x) Sr0.61Ba0.39Nb2O6 with nominal x = 0.00, 0.25, 0.50, 0.75, and 1.00 were studied to clarify the dynamical properties at the crossover from relaxor (x = 0) to normal (x = 1) ferroelectric behavior. The longitudinal acoustic (LA) and transverse acoustic (TA) modes and a central peak (CP) related to the relaxation process of polarization fluctuations along the polar c-axis were studied in uniaxial ferroelectric CSBN single crystals as a function of temperature via Brillouin scattering spectroscopy. A CBN28 (x = 1.00) crystal shows the sharp elastic anomaly of the LA mode in the gigahertz range toward Curie temperature, Tc. However, those of CSBN25 (x = 0.25) and SBN61 (x = 0.00) crystals show diffusive anomalies due to stronger random fields. The relaxation time determined from the width of a CP shows a critical slowing down in the vicinity of Tc. The elastic anomaly and slowing down of relaxation time of CSBN100x crystals become diffusive in the vicinity of Tc as the CBN28 content decreases. The origin of the crossover from relaxor to normal ferroelectric phase transitions is discussed in terms of the difference in the A1 and A2 sites' occupancies.
Collapse
Affiliation(s)
- Seiji Kojima
- Division of Materials Science, University of Tsukuba, Tsukuba 305-8573, Japan
| | - Md Aftabuzzaman
- Division of Materials Science, University of Tsukuba, Tsukuba 305-8573, Japan
- Department of Physics, Pabna University of Science and Technology, Pabna 6600, Bangladesh
| | - Jan Dec
- Institute of Materials Science, University of Silesia, PL-40-007 Katowice, Poland
| | - Wolfgang Kleemann
- Angewandte Physik, University of Duisburg-Essen, D-47048 Duisburg, Germany
| |
Collapse
|
17
|
Hamada M, Muramatsu H, Torii Y, Suzuki K, Narita A, Yoshida T, Imaya M, Yamamori A, Wakamatsu M, Miwata S, Narita K, Kataoka S, Kawashima N, Taniguchi R, Nishikawa E, Nishio N, Ito Y, Kojima S, Takahashi Y. Human leukocyte antigen 7/8-matched unrelated bone marrow transplantation using anti-thymocyte globulin in children. Int J Hematol 2023:10.1007/s12185-023-03571-5. [PMID: 36881377 DOI: 10.1007/s12185-023-03571-5] [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: 10/03/2022] [Revised: 02/18/2023] [Accepted: 02/19/2023] [Indexed: 03/08/2023]
Abstract
Human leukocyte antigen (HLA) mismatched unrelated donor transplantation is associated with an increased risk of graft-versus-host disease, graft failure, and infection, which increases post-transplant morbidity and mortality. In this single-center retrospective study, outcomes were evaluated in 30 consecutive children who underwent bone marrow transplantation (BMT) from HLA 1 allele-mismatched (HLA 7/8-matched) unrelated donors with rabbit anti-thymocyte globulin (rATG) as graft-versus-host disease (GVHD) prophylaxis. The 3-year overall survival (OS), event-free survival (EFS), and GVHD-relapse-free survival rates were 91.7% (95% CI 70.5%-91.9%), 88.3% (95% CI 67.5%-96.1%), and 73.9% (95% CI 52.4%-86.8%), respectively. Grade II-IV and III-IV acute GVHD occurred in 10 (33%) and 2 (7.0%) patients, respectively. The 3-year cumulative incidence of chronic GVHD was 7.8%. No fatal viral infections occurred. The study results show the feasibility of HLA 7/8-matched unrelated BMT with ATG to achieve favorable outcomes and acceptable GVHD, especially for patients who lack a fully matched donor.
Collapse
Affiliation(s)
- Motoharu Hamada
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Hideki Muramatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan.
| | - Yuka Torii
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Kyogo Suzuki
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Atsushi Narita
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Taro Yoshida
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Masayuki Imaya
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Ayako Yamamori
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Manabu Wakamatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Shunsuke Miwata
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Kotaro Narita
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Shinsuke Kataoka
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Nozomu Kawashima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Rieko Taniguchi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Eri Nishikawa
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Nobuhiro Nishio
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan.,Center for Advanced Medicine and Clinical Research, Nagoya University Hospital, Nagoya, Japan
| | - Yoshinori Ito
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Seiji Kojima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan
| | - Yoshiyuki Takahashi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-Cho, Showa-Ku, Nagoya, Aichi, 466-8550, Japan.
| |
Collapse
|
18
|
Terashima H, Homma M, Kojima S. Site-Directed Cross-Linking Between Bacterial Flagellar Motor Proteins In Vivo. Methods Mol Biol 2023; 2646:71-82. [PMID: 36842107 DOI: 10.1007/978-1-0716-3060-0_7] [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: 02/27/2023]
Abstract
The bacterial flagellum employs a rotary motor embedded on the cell surface. The motor consists of the stator and rotor elements and is driven by ion influx (typically H+ or Na+) through an ion channel of the stator. Ion influx induces conformational changes in the stator, followed by changes in the interactions between the stator and rotor. The driving force to rotate the flagellum is thought to be generated by changing the stator-rotor interactions. In this chapter, we describe two methods for investigating the interactions between the stator and rotor: site-directed in vivo photo-crosslinking and site-directed in vivo cysteine disulfide crosslinking.
Collapse
Affiliation(s)
- Hiroyuki Terashima
- Department of Bacteriology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan.
| | - Michio Homma
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
| | - Seiji Kojima
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
| |
Collapse
|
19
|
Kojima S, Homma M, Kandori H. Purification of the Na +-Driven PomAB Stator Complex and Its Analysis Using ATR-FTIR Spectroscopy. Methods Mol Biol 2023; 2646:95-107. [PMID: 36842109 DOI: 10.1007/978-1-0716-3060-0_9] [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: 02/27/2023]
Abstract
The flagellar motor of marine Vibrio is driven by the sodium-motive force across the inner membrane. The stator complex, consisting of two membrane proteins PomA and PomB, is responsible for energy conversion in the motor. To understand the coupling of the Na+ flux with torque generation, it is essential to clearly identify the Na+-binding sites and the Na+ flux pathway through the stator channel. Although residues essential for Na+ flux have been identified by using mutational analysis, it has been difficult to observe Na+ binding to the PomAB stator complex. Here we describe a method to monitor the binding of Na+ to purified PomAB stator complex using attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy. This method demonstrates that Na+-binding sites are formed by critical aspartic acid and threonine residues located in the transmembrane segments of PomAB.
Collapse
Affiliation(s)
- Seiji Kojima
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan.
| | - Michio Homma
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
| | - Hideki Kandori
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Nagoya, Japan.
| |
Collapse
|
20
|
Yamamori A, Hamada M, Muramatsu H, Wakamatsu M, Hama A, Narita A, Tsumura Y, Yoshida T, Doi T, Terada K, Higa T, Yamamoto N, Miura H, Shiota M, Watanabe K, Yoshida N, Maemura R, Imaya M, Miwata S, Narita K, Kataoka S, Taniguchi R, Suzuki K, Kawashima N, Nishio N, Iwafuchi H, Ito M, Kojima S, Okuno Y, Takahashi Y. Germline and somatic RUNX1 variants in a pediatric bone marrow failure cohort. Am J Hematol 2023; 98:E102-E105. [PMID: 36740830 DOI: 10.1002/ajh.26874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 01/21/2023] [Accepted: 01/25/2023] [Indexed: 02/07/2023]
Affiliation(s)
- Ayako Yamamori
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Motoharu Hamada
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hideki Muramatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Manabu Wakamatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Asahito Hama
- Department of Hematology and Oncology, Children's Medical Center, Japanese Red Cross Aichi Medical Center Nagoya First Hospital, Nagoya, Japan
| | - Atsushi Narita
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yusuke Tsumura
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Taro Yoshida
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Takehiko Doi
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical & Health Sciences, Hiroshima, Japan
| | - Kazuki Terada
- Department of Pediatric Hematology and Oncology, Japanese Red Cross Narita Hospital, Narita, Japan
| | - Takeshi Higa
- Division of Pediatric Hematology/Oncology, Okinawa Prefectural Nanbu Medical Center and Children's Medical Center, Okinawa, Japan
| | - Nobuyuki Yamamoto
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hiroki Miura
- Department of Pediatrics, Fujita Health University School of Medicine, Toyoake, Japan
| | - Mitsutaka Shiota
- Department of Pediatrics, Kitano Hospital, Tazuke Kofukai Medical Research Institute, Osaka, Japan
| | - Kenichiro Watanabe
- Department of Hematology and Oncology, Shizuoka Children's Hospital, Shizuoka, Japan
| | - Nao Yoshida
- Department of Hematology and Oncology, Children's Medical Center, Japanese Red Cross Aichi Medical Center Nagoya First Hospital, Nagoya, Japan
| | - Ryo Maemura
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Masayuki Imaya
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shunsuke Miwata
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kotaro Narita
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shinsuke Kataoka
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Rieko Taniguchi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kyogo Suzuki
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Nozomu Kawashima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Nobuhiro Nishio
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hideto Iwafuchi
- Department of Pathology, Shizuoka Children's Hospital, Shizuoka, Japan
| | - Masafumi Ito
- Department of Pathology, Japanese Red Cross Aichi Medical Center Nagoya First Hospital, Nagoya, Japan
| | - Seiji Kojima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yusuke Okuno
- Department of Virology, Nagoya City University Graduate School of Medical Science and Medical School, Nagoya, Japan
| | - Yoshiyuki Takahashi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| |
Collapse
|
21
|
Rahaman MM, Kojima S. Brillouin Scattering Study of Electro-Optic KTa 1-xNb xO 3 Crystals. Materials (Basel) 2023; 16:652. [PMID: 36676389 PMCID: PMC9865914 DOI: 10.3390/ma16020652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/28/2022] [Accepted: 01/04/2023] [Indexed: 06/17/2023]
Abstract
The functionality enhancement of ferroelectrics by local polar clusters called polar nanoregions (PNRs) is one of the current interests in materials science. KTa1-xNbxO3 (KTN) with perovskite structure is a well-known electro-optic crystal with a large Kerr effect. The existence of PNRs in relaxor-like ferroelectric Nb-rich KTN with homovalent B-site cations is controversial. This paper reviews recent progress in understanding precursor dynamics in Nb-rich KTN crystals studied using Brillouin scattering. The intense central peak (CP) and significant softening of sound velocity are observed above the Curie temperature (TC) due to the polarization fluctuations in PNRs. The effects of Li-doping, defects, and electric fields on the growth and/or creation of PNRs are found using changes in acoustic properties. The electric-field-induced TC, which is shifted to higher values with increases in applied voltage, including critical endpoint (CEP) and field gradient by trapped electrons, are discussed as well. This new knowledge may give new insight into advanced functionality in perovskite ferroelectrics.
Collapse
Affiliation(s)
- Md. Mijanur Rahaman
- Department of Materials Science and Engineering, University of Rajshahi, Rajshahi 6205, Bangladesh
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8573, Japan
| | - Seiji Kojima
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8573, Japan
| |
Collapse
|
22
|
Sivasubramanian V, Ganesamoorthy S, Kojima S. Anomalies of Brillouin Light Scattering in Selected Perovskite Relaxor Ferroelectric Crystals. Materials (Basel) 2023; 16:605. [PMID: 36676345 PMCID: PMC9866364 DOI: 10.3390/ma16020605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/03/2023] [Accepted: 01/05/2023] [Indexed: 06/17/2023]
Abstract
Compositionally disordered perovskite compounds have been one of the exotic topics of research during the past several years. Colossal piezoelectric and electrostrictive effects have been observed in disordered perovskite ferroelectric materials. The key ingredient in the physical behavior of disordered perovskites is the nucleation and growth of the local dipolar regions called polar nanoregions (PNRs). PNRs begin to nucleate far above the temperature of the dielectric maximum Tm and exhibit varied relaxation behavior with temperature. The evidence for the existence of various stages in the relaxation dynamics of PNRs was revealed through the study of the temperature evolution of optical phonons by Raman scattering. The quasi-static regime of PNRs is characterized by the strong coupling between the local polarization and strain with the local structural phase transition and the critical slowing of the relaxation time. Strong anomalies in the frequency and the width of the acoustic phonons, and emergence of the central peak in the quasi-static region of the relaxation dynamics of PNRs have been observed through Brillouin scattering studies. In this review, we discuss the anomalies observed in Brillouin scattering in selected disordered perovskite ferroelectrics crystals such as Pb(Mg1/3Ta2/3)O3, Pb(Sc1/2Ta1/2)O3, 0.65PIN-0.35PT and Sr0.97Ca0.03TiO3 to understand dynamical behavior of PNRs.
Collapse
Affiliation(s)
- Venkatasubramanian Sivasubramanian
- Condensed Matter Physics Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India
- Homi Bhabha National Institute, Mumbai 400094, India
| | - Sarveswaran Ganesamoorthy
- Condensed Matter Physics Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India
- Homi Bhabha National Institute, Mumbai 400094, India
| | - Seiji Kojima
- Division of Materials Science, University of Tsukuba, Tsukuba 305-8573, Japan
| |
Collapse
|
23
|
Derets NK, Fedoseev AI, Ko JH, Kojima S, Lushnikov SG. Quasielastic Light Scattering in the Broadband Brillouin Spectra of Relaxor Ferroelectric PbMg 1/3Nb 2/3O 3. Materials (Basel) 2022; 16:346. [PMID: 36614685 PMCID: PMC9822410 DOI: 10.3390/ma16010346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 12/20/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
In this paper, the behavior of quasielastic light scattering (QELS) in a PbMg1/3Nb2/3O3 (PMN) crystal under broadband Brillouin light scattering in a temperature range from 750 K to 80 K was studied. It was shown that QELS consists of two components: narrow (0.9 GHz to 11 GHz) and wide (80 GHz to 600 GHz). The dependencies of the intensity, I, of these components on the frequency, ν, are well described by the power law I ~ eνα, with different α, and are determined by the distribution of the relaxation times. The analysis of the Brillouin spectra showed that the behavior of the relaxation time of both the components of QELS with temperature change is well described by the Arrhenius law. Additionally, in the vicinity of the intermediate temperature T* ≈ 380 K, a critical relaxation time behavior for the narrow component of QELS was detected. In the vicinity of the same temperature, a maximum in the integral intensity of both the components of QELS was observed, which is adjacent to another maximum in the region of the Vogel-Fulcher temperature TVF ≈ 250 K corresponding to the transformation of the crystal to a nonergodic state.
Collapse
Affiliation(s)
- Nikita K. Derets
- Division of Physics of Dielectrics and Semiconductors, Ioffe Institute, Politekhnicheskaya 26, 194021 St. Petersburg, Russia
| | - Alexander I. Fedoseev
- Division of Physics of Dielectrics and Semiconductors, Ioffe Institute, Politekhnicheskaya 26, 194021 St. Petersburg, Russia
| | - Jae-Hyeon Ko
- School of Nano Convergence Technology, Nano Convergence Technology Center, Hallym University, 1 Hallymdaehakgil, Chuncheon 24252, Gangwondo, Republic of Korea
| | - Seiji Kojima
- Division of Materials Science, University of Tsukuba, Tsukuba 305-8573, Ibaraki, Japan
| | - Sergey G. Lushnikov
- Division of Physics of Dielectrics and Semiconductors, Ioffe Institute, Politekhnicheskaya 26, 194021 St. Petersburg, Russia
| |
Collapse
|
24
|
Maemura R, Wakamatsu M, Matsumoto K, Sakaguchi H, Yoshida N, Hama A, Yoshida T, Miwata S, Kitazawa H, Narita K, Kataoka S, Ichikawa D, Hamada M, Taniguchi R, Suzuki K, Kawashima N, Nishikawa E, Narita A, Okuno Y, Nishio N, Kato K, Kojima S, Morita K, Muramatsu H, Takahashi Y. Clinical Impact of Melphalan Pharmacokinetics on Transplantation Outcomes in Children Undergoing Hematopoietic Stem Cell Transplantation. Cell Transplant 2022; 31:9636897221143364. [PMID: 36537564 PMCID: PMC9772935 DOI: 10.1177/09636897221143364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Melphalan is widely used for hematopoietic stem cell transplantation (HSCT) conditioning. However, the relationship between its pharmacokinetic (PK) and transplantation outcomes in children has not been thoroughly investigated. We prospectively analyzed the relationship between melphalan area under the curve (AUC) and transplantation outcome and examined the development of a predictive model for melphalan clearance in children. This study included 43 children aged 0 to 19 years who underwent HSCT following a melphalan-based conditioning regimen from 2017 to 2021. In univariable analysis, high-melphalan AUC resulted in a significantly lower cumulative incidence of acute graft-versus-host disease and a higher cumulative incidence of thrombotic microangiopathy, although no significant difference was observed in survival. Regression analysis of a randomly selected derivation cohort (n = 21) revealed the following covariate PK model: predicted melphalan clearance (mL/min) = 6.47 × 24-h urinary creatinine excretion rate (CER, g/day) × 24-h creatinine clearance rate (CCR, mL/min) + 92.8. In the validation cohort (n = 22), the measured melphalan clearance values were significantly correlated with those calculated based on the prediction equation (R2 = 0.663). These results indicate that melphalan exposure may be optimized by adjusting the melphalan dose according to CER and CCR.
Collapse
Affiliation(s)
- Ryo Maemura
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan,Department of Hematology and Oncology, Children’s Medical Center, Japanese Red Cross Aichi Medical Center Nagoya First Hospital, Nagoya, Japan
| | - Manabu Wakamatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan,Department of Hematology and Oncology, Children’s Medical Center, Japanese Red Cross Aichi Medical Center Nagoya First Hospital, Nagoya, Japan
| | - Kana Matsumoto
- Department of Clinical Pharmaceutics, Faculty of Pharmaceutical Sciences, Doshisha Women’s College of Liberal Arts, Kyotanabe, Japan
| | - Hirotoshi Sakaguchi
- Department of Hematology and Oncology, Children’s Medical Center, Japanese Red Cross Aichi Medical Center Nagoya First Hospital, Nagoya, Japan
| | - Nao Yoshida
- Department of Hematology and Oncology, Children’s Medical Center, Japanese Red Cross Aichi Medical Center Nagoya First Hospital, Nagoya, Japan
| | - Asahito Hama
- Department of Hematology and Oncology, Children’s Medical Center, Japanese Red Cross Aichi Medical Center Nagoya First Hospital, Nagoya, Japan
| | - Taro Yoshida
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shunsuke Miwata
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hironobu Kitazawa
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kotaro Narita
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shinsuke Kataoka
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Daisuke Ichikawa
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Motoharu Hamada
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Rieko Taniguchi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kyogo Suzuki
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Nozomu Kawashima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Eri Nishikawa
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Atsushi Narita
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yusuke Okuno
- Center for Advanced Medicine and Clinical Research, Nagoya University Hospital, Nagoya, Japan
| | - Nobuhiro Nishio
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan,Center for Advanced Medicine and Clinical Research, Nagoya University Hospital, Nagoya, Japan
| | - Koji Kato
- Department of Hematology and Oncology, Children’s Medical Center, Japanese Red Cross Aichi Medical Center Nagoya First Hospital, Nagoya, Japan
| | - Seiji Kojima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kunihiko Morita
- Department of Clinical Pharmaceutics, Faculty of Pharmaceutical Sciences, Doshisha Women’s College of Liberal Arts, Kyotanabe, Japan
| | - Hideki Muramatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan,Hideki Muramatsu, Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8560, Aichi, Japan.
| | - Yoshiyuki Takahashi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| |
Collapse
|
25
|
Helal MA, Kojima S. Brillouin Scattering and First-Principles Studies of BaMO 3 (M = Ti, Zr, and Cu) Perovskites. Materials (Basel) 2022; 15:6747. [PMID: 36234088 PMCID: PMC9573334 DOI: 10.3390/ma15196747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/10/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
Perovskite oxides with the general formula ABO3 comprise a large number of families among the structures of oxide-based materials, and currently, several perovskite structures have been identified. From a variety of compositions and structures, various functions are observed in perovskite compounds, and therefore, they became very useful for various applications in the electronic and medical industries. One of the most puzzling issues for perovskite compounds is the understanding of the vibration and relaxation dynamics in the gigahertz range. In that sense, the micro-Brillouin scattering system is a very effective tool to probe the gigahertz dynamics, and also, first-principles calculations can be used to describe the phonon structure with different atomic contributions. The micro-Brillouin scattering system and first-principles calculations provide the fundamental information on a variety of vibration and relaxation processes related to structural phase transitions under different external conditions such as temperature, electric field, and pressure. This review article summarizes the Brillouin scattering and first-principles studies on BaMO3 (M = Ti, Zr, and Cu). Through a detailed analysis of the existing results, we summarize the existing limitations and future perspectives in these research areas, which may propel the development of different perovskite ferroelectrics and extend their practical application areas.
Collapse
Affiliation(s)
- Md Al Helal
- Department of Physics, Begum Rokeya University, Rangpur 5400, Bangladesh
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Ibaraki 305-8573, Japan
| | - Seiji Kojima
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Ibaraki 305-8573, Japan
| |
Collapse
|
26
|
Nishikino T, Takekawa N, Tran DP, Kishikawa JI, Hirose M, Onoe S, Kojima S, Homma M, Kitao A, Kato T, Imada K. Structure of MotA, a flagellar stator protein, from hyperthermophile. Biochem Biophys Res Commun 2022; 631:78-85. [PMID: 36179499 DOI: 10.1016/j.bbrc.2022.09.072] [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: 09/11/2022] [Revised: 09/13/2022] [Accepted: 09/18/2022] [Indexed: 11/02/2022]
Abstract
Many motile bacteria swim and swarm toward favorable environments using the flagellum, which is rotated by a motor embedded in the inner membrane. The motor is composed of the rotor and the stator, and the motor torque is generated by the change of the interaction between the rotor and the stator induced by the ion flow through the stator. A stator unit consists of two types of membrane proteins termed A and B. Recent cryo-EM studies on the stators from mesophiles revealed that the stator consists of five A and two B subunits, whereas the low-resolution EM analysis showed that purified hyperthermophilic MotA forms a tetramer. To clarify the assembly formation and factors enhancing thermostability of the hyperthermophilic stator, we determined the cryo-EM structure of MotA from Aquifex aeolicus (Aa-MotA), a hyperthermophilic bacterium, at 3.42 Å resolution. Aa-MotA forms a pentamer with pseudo C5 symmetry. A simulated model of the Aa-MotA5MotB2 stator complex resembles the structures of mesophilic stator complexes, suggesting that Aa-MotA can assemble into a pentamer equivalent to the stator complex without MotB. The distribution of hydrophobic residues of MotA pentamers suggests that the extremely hydrophobic nature in the subunit boundary and the transmembrane region is a key factor to stabilize hyperthermophilic Aa-MotA.
Collapse
Affiliation(s)
- Tatsuro Nishikino
- Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
| | - Norihiro Takekawa
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka, 560-0043, Japan
| | - Duy Phuoc Tran
- School of Life Sciences and Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Jun-Ichi Kishikawa
- Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Mika Hirose
- Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Sakura Onoe
- Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Seiji Kojima
- Division of Biological Science, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8602, Japan
| | - Michio Homma
- Division of Biological Science, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8602, Japan
| | - Akio Kitao
- School of Life Sciences and Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Takayuki Kato
- Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Katsumi Imada
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka, 560-0043, Japan.
| |
Collapse
|
27
|
Imaizumi T, Meyer J, Wakamatsu M, Kitazawa H, Murakami N, Okuno Y, Yoshida T, Sajiki D, Hama A, Kojima S, Takahashi Y, Loh M, Stieglitz E, Muramatsu H. Clinical parameter-based prediction of DNA methylation classification generates a prediction model of prognosis in patients with juvenile myelomonocytic leukemia. Sci Rep 2022; 12:14753. [PMID: 36042365 PMCID: PMC9427938 DOI: 10.1038/s41598-022-18733-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 08/18/2022] [Indexed: 11/11/2022] Open
Abstract
Juvenile myelomonocytic leukemia (JMML) is a rare heterogeneous hematological malignancy of early childhood characterized by causative RAS pathway mutations. Classifying patients with JMML using global DNA methylation profiles is useful for risk stratification. We implemented machine learning algorithms (decision tree, support vector machine, and naïve Bayes) to produce a DNA methylation-based classification according to recent international consensus definitions using a well-characterized pooled cohort of patients with JMML (n = 128). DNA methylation was originally categorized into three subgroups: high methylation (HM), intermediate methylation (IM), and low methylation (LM), which is a trichotomized classification. We also dichotomized the subgroups as HM/IM and LM. The decision tree model showed high concordances with 450k-based methylation [82.3% (106/128) for the dichotomized and 83.6% (107/128) for the trichotomized subgroups, respectively]. With an independent cohort (n = 72), we confirmed that these models using both the dichotomized and trichotomized classifications were highly predictive of survival. Our study demonstrates that machine learning algorithms can generate clinical parameter-based models that predict the survival outcomes of patients with JMML and high accuracy. These models enabled us to rapidly and effectively identify candidates for augmented treatment following diagnosis.
Collapse
Affiliation(s)
- Takahiro Imaizumi
- Department of Advanced Medicine, Nagoya University Hospital, Nagoya, Japan
| | - Julia Meyer
- Department of Pediatrics, Benioff Children's Hospital, University of California, San Francisco, San Francisco, USA
| | - Manabu Wakamatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8560, Japan
| | - Hironobu Kitazawa
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8560, Japan
| | - Norihiro Murakami
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8560, Japan
| | - Yusuke Okuno
- Department of Virology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Taro Yoshida
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8560, Japan
| | - Daichi Sajiki
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8560, Japan
| | - Asahito Hama
- Department of Hematology and Oncology, Children's Medical Center, Japanese Red Cross Nagoya First Hospital, Nagoya, Japan
| | - Seiji Kojima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8560, Japan
| | - Yoshiyuki Takahashi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8560, Japan
| | - Mignon Loh
- Department of Pediatrics, Benioff Children's Hospital, University of California, San Francisco, San Francisco, USA
| | - Elliot Stieglitz
- Department of Pediatrics, Benioff Children's Hospital, University of California, San Francisco, San Francisco, USA
| | - Hideki Muramatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8560, Japan.
| |
Collapse
|
28
|
Narita K, Muramatsu H, Narumi S, Nakamura Y, Okuno Y, Suzuki K, Hamada M, Yamaguchi N, Suzuki A, Nishio Y, Shiraki A, Yamamori A, Tsumura Y, Sawamura F, Kawaguchi M, Wakamatsu M, Kataoka S, Kato K, Asada H, Kubota T, Muramatsu Y, Kidokoro H, Natsume J, Mizuno S, Nakata T, Inagaki H, Ishihara N, Yonekawa T, Okumura A, Ogi T, Kojima S, Kaname T, Hasegawa T, Saitoh S, Takahashi Y. Whole-exome analysis of 177 pediatric patients with undiagnosed diseases. Sci Rep 2022; 12:14589. [PMID: 36028527 PMCID: PMC9418234 DOI: 10.1038/s41598-022-14161-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 06/02/2022] [Indexed: 11/09/2022] Open
Abstract
Recently, whole-exome sequencing (WES) has been used for genetic diagnoses of patients who remain otherwise undiagnosed. WES was performed in 177 Japanese patients with undiagnosed conditions who were referred to the Tokai regional branch of the Initiative on Rare and Undiagnosed Diseases (IRUD) (TOKAI-IRUD). This study included only patients who had not previously received genome-wide testing. Review meetings with specialists in various medical fields were held to evaluate the genetic diagnosis in each case, which was based on the guidelines of the American College of Medical Genetics and Genomics. WES identified diagnostic single-nucleotide variants in 66 patients and copy number variants (CNVs) in 11 patients. Additionally, a patient was diagnosed with Angelman syndrome with a complex clinical phenotype upon detection of a paternally derived uniparental disomy (UPD) [upd(15)pat] wherein the patient carried a homozygous DUOX2 p.E520D variant in the UPD region. Functional analysis confirmed that this DUOX2 variant was a loss-of-function missense substitution and the primary cause of congenital hypothyroidism. A significantly higher proportion of genetic diagnoses was achieved compared to previous reports (44%, 78/177 vs. 24-35%, respectively), probably due to detailed discussions and the higher rate of CNV detection.
Collapse
Affiliation(s)
- Kotaro Narita
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Hideki Muramatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Satoshi Narumi
- Department of Molecular Endocrinology, National Research Institute for Child Health, Tokyo, Japan.,Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
| | - Yuji Nakamura
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601, Japan
| | - Yusuke Okuno
- Medical Genomics Center, Nagoya University Hospital, Nagoya, Japan.,Department of Virology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Kyogo Suzuki
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Motoharu Hamada
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Naoya Yamaguchi
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601, Japan
| | - Atsushi Suzuki
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601, Japan
| | - Yosuke Nishio
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Anna Shiraki
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Ayako Yamamori
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Yusuke Tsumura
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Fumi Sawamura
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Masahiro Kawaguchi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Manabu Wakamatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Shinsuke Kataoka
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Kohji Kato
- Department of Genetics, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
| | - Hideyuki Asada
- Department of Pediatrics, Japanese Red Cross Aichi Medical Center Nagoya Daiichi Hospital, Nagoya, Japan
| | - Tetsuo Kubota
- Department of Pediatrics, Anjo Kosei Hospital, Anjo, Japan
| | - Yukako Muramatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Hiroyuki Kidokoro
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Jun Natsume
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Seiji Mizuno
- Department of Clinical Genetics, Aichi Developmental Disability Center Central Hospital, Kasugai, Japan
| | - Tomohiko Nakata
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Hidehito Inagaki
- Division of Molecular Genetics, Institute for Comprehensive Medical Science, Fujita Health University, Toyoake, Japan
| | - Naoko Ishihara
- Department of Pediatrics, Fujita Health University School of Medicine, Toyoake, Japan
| | - Takahiro Yonekawa
- Department of Pediatrics, Mie University Graduate School of Medicine, Tsu, Japan
| | - Akihisa Okumura
- Department of Pediatrics, Aichi Medical University, Nagakute, Japan
| | - Tomoo Ogi
- Department of Genetics, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
| | - Seiji Kojima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Tadashi Kaname
- Department of Genome Medicine, National Center for Child Health and Development, Tokyo, Japan
| | - Tomonobu Hasegawa
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
| | - Shinji Saitoh
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601, Japan.
| | - Yoshiyuki Takahashi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan.
| |
Collapse
|
29
|
|
30
|
Wakamatsu M, Kojima D, Muramatsu H, Okuno Y, Kataoka S, Nakamura F, Sakai Y, Tsuge I, Ito T, Ueda K, Saito A, Morihana E, Ito Y, Ohashi N, Tanaka M, Tanaka T, Kojima S, Nakajima Y, Ito T, Takahashi Y. TREC/KREC Newborn Screening followed by Next-Generation Sequencing for Severe Combined Immunodeficiency in Japan. J Clin Immunol 2022; 42:1696-1707. [PMID: 35902420 DOI: 10.1007/s10875-022-01335-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [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: 05/02/2022] [Accepted: 07/15/2022] [Indexed: 10/16/2022]
Abstract
PURPOSE The aim of this study is to evaluate the usefulness of T cell receptor excision circle (TREC) and/or kappa-deleting recombination excision circle (KREC) measurements integrated with diagnostic next-generation sequencing (NGS) analysis using a severe combined immunodeficiency (SCID) newborn screening (NBS) program. METHODS TREC and/or KREC values were measured in 137,484 newborns between April 2017 and December 2021 using EnLite TREC (n = 80,791) or TREC/KREC kits (n = 56,693). For newborns with positive screening results, diagnostic NGS analysis was performed with a 349-gene panel to detect genetic mutations associated with primary immunodeficiencies (PIDs). RESULTS A total of 145 newborns (0.11%) had abnormal TREC and/or KREC values, and a genetic diagnosis was established in 2 patients with SCID (1 in 68,742 newborns) (IL2RG-SCID and reticular dysgenesis) and 10 with non-SCID PIDs with T and/or B cell deficiencies (1 in 13,748 newborns) using NGS analysis. Furthermore, TREC values of 2849 newborns were measured and confirmed the significant correlation between the results of both TREC and TREC/KREC kits (P < 0.001) and naïve T cell counts. CONCLUSIONS We performed the first large-scale TREC and TREC/KREC NBS programs in Japan. Our NBS programs followed by the diagnostic NGS analysis for newborns with abnormal TREC and/or KREC values are useful for the early identification and rapid molecular evaluation of not only SCID but also different non-SCID PIDs.
Collapse
Affiliation(s)
- Manabu Wakamatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Daiei Kojima
- Department of Pediatrics, Ogaki Municipal Hospital, Ogaki, Japan
| | - Hideki Muramatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Yusuke Okuno
- Department of Virology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Shinsuke Kataoka
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Fumiko Nakamura
- Department of Clinical Laboratory, Aichi Health Promotion Foundation, Nagoya, Japan
| | - Yoshimi Sakai
- Department of Clinical Laboratory, Aichi Health Promotion Foundation, Nagoya, Japan
| | - Ikuya Tsuge
- Department of Pediatrics, School of Medicine, Fujita Health University, Toyoake, Japan
| | - Tsuyoshi Ito
- Department of Pediatrics, Toyohashi Municipal Hospital, Toyohashi, Japan
| | - Kazuto Ueda
- Division of Neonatology, Center for Maternal-Neonatal Care, Nagoya University Hospital, Nagoya, Japan
| | - Akiko Saito
- Division of Neonatology, Center for Maternal-Neonatal Care, Nagoya University Hospital, Nagoya, Japan
| | - Eiji Morihana
- Department of Neonatology, Aichi Children's Health and Medical Center, Obu, Japan
| | - Yasuhiko Ito
- Department of Pediatrics, Nagoya City University West Medical Center, Nagoya, Japan
| | - Naoki Ohashi
- Department of Paediatric Cardiology, Chukyo Children Heart Centre, Japan, Community Health Care Organization Chukyo Hospital, Nagoya, Japan
| | - Makito Tanaka
- Department of Pediatrics, School of Medicine, Fujita Health University, Toyoake, Japan
| | - Taihei Tanaka
- Department of Pediatrics, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, Nagoya, Japan
| | - Seiji Kojima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yoko Nakajima
- Department of Pediatrics, School of Medicine, Fujita Health University, Toyoake, Japan
| | - Tetsuya Ito
- Department of Pediatrics, School of Medicine, Fujita Health University, Toyoake, Japan
| | - Yoshiyuki Takahashi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| |
Collapse
|
31
|
Homma M, Takekawa N, Fujiwara K, Hao Y, Onoue Y, Kojima S. Formation of multiple flagella caused by a mutation of the flagellar rotor protein FliM in Vibrio alginolyticus. Genes Cells 2022; 27:568-578. [PMID: 35842835 DOI: 10.1111/gtc.12975] [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: 05/18/2022] [Revised: 06/21/2022] [Accepted: 07/11/2022] [Indexed: 11/30/2022]
Abstract
Marine bacterium Vibrio alginolyticus forms a single flagellum at a cell pole. In Vibrio, two proteins (GTPase FlhF and ATPase FlhG) regulate the number of flagella. We previously isolated the NMB155 mutant that forms multiple flagella despite the absence of mutations in flhF and flhG. Whole-genome sequencing of NMB155 identified an E9K mutation in FliM that is a component of C-ring in the flagellar rotor. Mutations in FliM result in defects in flagellar formation (fla) and flagellar rotation (che or mot); however, there are a few reports indicating that FliM mutations increase the number of flagella. Here, we determined that the E9K mutation confers the multi-flagellar phenotype and also the che phenotype. The co-expression of wild-type FliM and FliM-E9K indicated that they were competitive in regard to determining the flagellar number. The ATPase activity of FlhG has been correlated with the number of flagella. We observed that the ATPase activity of FlhG was increased by the addition of FliM but not by the addition of FliM-E9K in vitro. This indicates that FliM interacts with FlhG to increase its ATPase activity, and the E9K mutation may inhibit this interaction. FliM may control the ATPase activity of FlhG to properly regulate the number of the polar flagellum at the cell pole. This article is protected by copyright. All rights reserved.
Collapse
Affiliation(s)
- Michio Homma
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Aichi, Japan
| | - Norihiro Takekawa
- Department of Macromolecular Science, Graduate School of Science, Osaka University, Osaka, Japan
| | - Kazushi Fujiwara
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Aichi, Japan
| | - Yuxi Hao
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Aichi, Japan
| | - Yasuhiro Onoue
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Aichi, Japan
| | - Seiji Kojima
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Aichi, Japan
| |
Collapse
|
32
|
Rahaman MM, Hossain KM, Rubel MHK, Islam AKMA, Kojima S. Alkaline-Earth Metal Effects on Physical Properties of Ferromagnetic AVO 3 (A = Ba, Sr, Ca, and Mg): Density Functional Theory Insights. ACS Omega 2022; 7:20914-20926. [PMID: 35755384 PMCID: PMC9219064 DOI: 10.1021/acsomega.2c01630] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 05/26/2022] [Indexed: 06/15/2023]
Abstract
The effects of alkaline-earth metals on electronic, optical, thermodynamic, and physical properties of ferromagnetic AVO3 (A = Ba, Sr, Ca, and Mg) have been investigated by first-principles calculations within the GGA+U formalism based on density functional theory. The optimized structural parameters are in good agreement with the available experimental results that evaluate the reliability of our calculations. The cell and mechanical stability is discussed using the formation energy and Born stability criteria, respectively. The mechanical behaviors of AVO3 are discussed on the basis of the results of elastic constants, elastic moduli, Peierls stress, and Vickers hardness. The nature of the ductile-brittle transition of AVO3 compounds was confirmed by the values of Pugh's ratio, Poisson's ratio, and Cauchy pressure. The electronic band structures, as well as density of states, reveal the half-metallic behavior of BaVO3 and SrVO3. However, CaVO3 and MgVO3 exhibit spin-gapless and magnetic semiconductor characteristics, respectively. The microscopic origin of the transition from the half-metallic to semiconductor nature of AVO3 is rationalized using electronic properties. The presence of covalent, ionic, and metallic bonds in AVO3 compounds is found by the analysis of bonding properties. The single-band nature of half-metallic AVO3 is seen by observing hole-like Fermi surfaces in this study. Furthermore, the various thermodynamic and optical properties are calculated and analyzed. The refractive index suggests that AVO3 could be a potential candidate for applications to high-density optical data storage devices.
Collapse
Affiliation(s)
- Md. Mijanur Rahaman
- Department
of Materials Science and Engineering, University
of Rajshahi, Rajshahi 6205, Bangladesh
| | | | - Mirza Humaun Kabir Rubel
- Department
of Materials Science and Engineering, University
of Rajshahi, Rajshahi 6205, Bangladesh
| | - A. K. M. Azharul Islam
- Department
of Physics, University of Rajshahi, Rajshahi 6205, Bangladesh
- International
Islamic University Chittagong, Kumira, Chittagong 4318, Bangladesh
| | - Seiji Kojima
- Graduate
School of Pure and Applied Sciences, University
of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
| |
Collapse
|
33
|
Homma M, Mizuno A, Hao Y, Kojima S. Functional analysis of the N-terminal region of Vibrio FlhG, a MinD-type ATPase in flagellar number control. J Biochem 2022; 172:99-107. [DOI: 10.1093/jb/mvac047] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 05/17/2022] [Indexed: 11/12/2022] Open
Abstract
Summary
GTPase FlhF and ATPase FlhG are two key factors involved in regulating the flagellum number in Vibrio alginolyticus. FlhG is a paralog of the Escherichia coli cell division regulator MinD and has a longer N-terminal region than MinD with a conserved DQAxxLR motif. The deletion of this N-terminal region or a Q9A mutation in the DQAxxLR motif prevents FlhG from activating the GTPase activity of FlhF in vitro and causes a multi-flagellation phenotype. The mutant FlhG proteins, especially the N-terminally deleted variant, was remarkably reduced compared to that of the wild-type protein in vivo. When the mutant FlhG was expressed at the same level as the wild-type FlhG, the number of flagella was restored to the wild-type level. Once synthesized in Vibrio cells, the N-terminal region mutation in FlhG seems not to affect the protein stability. We speculated that the flhG translation efficiency is decreased by N-terminal mutation. Our results suggest that the N-terminal region of FlhG controls the number of flagella by adjusting the FlhF activity and the amount of FlhG in vivo. We speculate that the regulation by FlhG, achieved through transcription by the master regulator FlaK, is affected by the mutations, resulting in reduced flagellar formation by FlhF.
Collapse
Affiliation(s)
- Michio Homma
- Graduate School of Science Division of Biological Science, , Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan
| | - Akira Mizuno
- Graduate School of Science Division of Biological Science, , Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan
| | - Yuxi Hao
- Graduate School of Science Division of Biological Science, , Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan
| | - Seiji Kojima
- Graduate School of Science Division of Biological Science, , Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan
| |
Collapse
|
34
|
Kondo M, Suzuki T, Kawano Y, Kojima S, Miyashiro M, Matsumoto A, Kania G, Blyszczuk P, Ross R, Mulipa P, Del Galdo F, Zhang Y, Distler JHW. POS0467 DERSIMELAGON, A NOVEL ORAL MELANOCORTIN 1 RECEPTOR AGONIST, DEMONSTRATES DISEASE-MODIFYING EFFECTS IN PRECLINICAL MODELS OF SYSTEMIC SCLEROSIS. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.29] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BackgroundActivation of melanocortin 1 receptor (MC1R) is known to have broad anti-inflammatory and anti-fibrotic effects. The bleomycin (BLM)-induced skin fibrosis murine model is well-established for systemic sclerosis (SSc). α-melanocyte-stimulating hormone, an endogenous ligand of MC1R, inhibits skin fibrosis and MC1R knock-out enhances skin fibrosis in this model. These pieces of evidence suggest that MC1R agonism has potential in the treatment of SSc.ObjectivesDersimelagon phosphate (MT-7117) is an investigational small molecule that is an orally administered, selective agonist for MC1R. The purpose of this study is to investigate the potential of MT-7117 as a therapeutic agent for SSc by evaluating its efficacy and mechanism of action in complementary preclinical models. The expression and distribution of MC1R in the skin of SSc patients was investigated.MethodsThe effects of MT-7117 on skin fibrosis and lung inflammation were evaluated in BLM-induced SSc murine models that were optimized for prophylactic and therapeutic evaluation. Microarray-based gene expression analysis and serum protein profiling were performed to investigate the mechanism of action of MT-7117 in the BLM-induced SSc models. The effect of MT-7117 on TGF-β-induced activation of human dermal fibroblasts was evaluated in vitro. Immunohistochemical analyses of MC1R expression in skin samples from SSc patients were performed.ResultsProphylactic treatment with MT-7117 (≥0.3 mg/kg/day p.o.) significantly inhibited the increase in collagen content of the skin, the serum level of surfactant protein D, and the weight of the lungs from BLM-induced skin fibrosis and lung inflammation model. Therapeutic treatment with MT-7117 (≥3 mg/kg/day p.o.) significantly suppressed skin thickening and the numbers of myofibroblasts in pre-established BLM-induced skin fibrosis model. Gene array analysis using the BLM-induced SSc model demonstrated changes in numerous categories related to macrophages, monocytes, and neutrophils, followed by endothelial cell-related categories after treatment with MT-7117. In the analysis that focused on biological functions, categories of inflammatory response, activation of antigen-presenting cells, angiogenesis, atherosclerosis, vasculogenesis, and vaso-occlusion were suppressed by MT-7117. In the analysis that focused on molecular signaling pathways, triggering receptor expressed on myeloid cells-1, IL-6, and oncostatin M involved in inflammation, and peroxisome proliferator-activated receptor that is related to fibrosis were all affected by MT-7117. Serum protein profiling using BLM-induced SSc model revealed that multiple SSc-related biomarkers including P-selectin, osteoprotegerin, cystatin C, growth and differentiation factor-15 and S100A9 were suppressed by MT-7117. MT-7117 inhibited the activation of human dermal fibroblasts by suppressing TGF-β-induced ACTA2 (encoding α-smooth muscle actin) mRNA elevation in vitro. Immunohistochemical analyses showed that MC1R positivity was observed in 40 of 50 diffuse cutaneous SSc patients. MC1R was expressed by monocytes/macrophages, neutrophils, blood vessels (endothelial cells), fibroblasts, and epidermis (keratinocytes) in the skin of SSc patients.ConclusionMT-7117 demonstrates disease-modifying effects in preclinical models of SSc. Investigations of its mechanism of action and target expression analyses indicate that MT-7117 exerts its positive effects by affecting the pathologies of inflammation, vascular dysfunction, and fibrosis through inflammatory cells, endothelial cells, and fibroblasts. In view of its potent beneficial impact on all these three main pathologies of SSc, MT-7117 is a potential therapeutic agent for the treatment of clinically challenging SSc, which has diverse and difficult to treat symptoms. A phase 2 clinical trial investigating the efficacy and tolerability of MT-7117 in patients with early, progressive diffuse cutaneous SSc is currently in progress.Disclosure of InterestsMasahiro Kondo Employee of: Mitsubishi Tanabe Pharma Corporation, Tsuyoshi Suzuki Employee of: Mitsubishi Tanabe Pharma Corporation, Yuko Kawano Employee of: Mitsubishi Tanabe Pharma Corporation, Shinji Kojima Employee of: Mitsubishi Tanabe Pharma Corporation, Masahiko Miyashiro Employee of: Mitsubishi Tanabe Pharma Corporation, Atsuhiro Matsumoto Employee of: Mitsubishi Tanabe Pharma Corporation, Gabriela Kania: None declared, Przemyslaw Blyszczuk: None declared, rebecca ross: None declared, Panji Mulipa: None declared, Francesco Del Galdo Grant/research support from: Prof. F. Del Galdo received fees and research support from Abbvie, AstraZeneca, Boehringer-Ingelheim, Capella, Chemomab, Kymab, Janssen and Mitsubishi-Tanabe., Yun Zhang: None declared, Jörg H.W. Distler Grant/research support from: Prof. J.H.W. Distler received consulting fees, lecture fees, and/or honoraria from Actelion, Active Biotech, Anamar, ARXX, aTyr, Bayer Pharma, Boehringer Ingelheim, Celgene, Galapagos, GSK, Inventiva, JB Therapeutics, Medac, Pfizer, Sanofi-Aventis, RedX, RuiYi and UCB. J. H. W. Distler is stock owner of 4D Science and Scientific head of FibroCure.
Collapse
|
35
|
Homma M, Kojima S. The Periplasmic Domain of the Ion-Conducting Stator of Bacterial Flagella Regulates Force Generation. Front Microbiol 2022; 13:869187. [PMID: 35572622 PMCID: PMC9093738 DOI: 10.3389/fmicb.2022.869187] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 03/24/2022] [Indexed: 11/23/2022] Open
Abstract
The bacterial flagellar stator is a unique ion-conducting membrane protein complex composed of two kinds of proteins, the A subunit and the B subunit. The stator couples the ion-motive force across the membrane into rotational force. The stator becomes active only when it is incorporated into the flagellar motor. The periplasmic region of the B subunit positions the stator by using the peptidoglycan-binding (PGB) motif in its periplasmic C-terminal domain to attach to the cell wall. Functional studies based on the crystal structures of the C-terminal domain of the B subunit (MotBC or PomBC) reveal that a dramatic conformational change in a characteristic α-helix allows the stator to conduct ions efficiently and bind to the PG layer. The plug and the following linker region between the transmembrane (TM) and PG-binding domains of the B subunit function in regulating the ion conductance. In Vibrio spp., the transmembrane protein FliL and the periplasmic MotX and MotY proteins also contribute to the motor function. In this review, we describe the functional and structural changes which the stator units undergo to regulate the activity of the stator to drive flagellar rotation.
Collapse
Affiliation(s)
- Michio Homma
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
| | - Seiji Kojima
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
| |
Collapse
|
36
|
Kojima S. 100th Anniversary of Brillouin Scattering: Impact on Materials Science. Materials 2022; 15:ma15103518. [PMID: 35629540 PMCID: PMC9143746 DOI: 10.3390/ma15103518] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 05/07/2022] [Accepted: 05/11/2022] [Indexed: 12/10/2022]
Abstract
L. Brillouin predicted inelastic light scattering by thermally excited sound waves in 1922. Brillouin scattering is a non-contact and non-destructive method to measure sound velocity and attenuation. It is possible to investigate the elastic properties of gases, liquids, glasses, and crystals. Various kinds of phase transitions, i.e., liquid–glass transitions, crystallization, polymorphism, and denaturation have been studied by changing the temperature, pressure, time, and external fields such as the electric, magnetic, and stress fields. Nowadays, Brillouin scattering is extensively used to measure various elementary excitations and quasi-elastic scattering in the gigahertz range between 0.1 and 1000 GHz. A brief history, spectroscopic methods, and Brillouin scattering studies in materials science on ferroelectric materials, glasses, and proteins are reviewed.
Collapse
Affiliation(s)
- Seiji Kojima
- Division of Materials Science, University of Tsukuba, Tsukuba 305-8573, Japan
| |
Collapse
|
37
|
Imaya M, Muramatsu H, Narita A, Yamamori A, Wakamatsu M, Yoshida T, Miwata S, Narita K, Ichikawa D, Hamada M, Nishikawa E, Kawashima N, Nishio N, Kojima S, Takahashi Y. Combination chemotherapy consisting of irinotecan, etoposide, and carboplatin for refractory or relapsed neuroblastoma. Cancer Med 2022; 11:1956-1964. [PMID: 35233973 PMCID: PMC9089216 DOI: 10.1002/cam4.4529] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 12/05/2021] [Accepted: 12/08/2021] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Patients with primary refractory and relapsed neuroblastoma have a poor prognosis since safe and effective chemotherapies for these patients are currently limited. The development of new chemotherapy regimens for these patients is imperative to improve survival outcomes. METHODS We retrospectively analyzed 40 patients with refractory (n = 36) or relapsed (n = 4) neuroblastoma who received irinotecan, etoposide, and carboplatin (IREC) as a second-line treatment. We evaluated their therapeutic response and the toxicity of IREC. We also assessed the impact of UGT1A1 gene polymorphisms, which are involved in irinotecan metabolism, on outcomes and toxicity. RESULTS A total of 112 cycles of IREC were administered to 40 patients with a median of 2 cycles per patient (range, 1-9). Six (15%) patients (UGT1A1 wild-type [n = 2] and heterozygous [n = 4]) showed objective responses, including partial response (n = 1), tumor shrinkage (n = 4), and improved findings on their MIBG scan (n = 1). Grade 4 neutropenia, grade 4 leukopenia, and grades 3-4 gastrointestinal toxicity were observed in 110 (98%), 88 (79%), and 3 (3%) cycles, respectively. There was no IREC-related mortality. Patients with UGT1A1 polymorphisms showed a higher frequency of grade 4 leukopenia, but these patients did not have increased treatment-related mortality or non-hematologic toxicity. CONCLUSIONS IREC showed an objective response rate of 15% including 1 case with partial response. IREC was well tolerated regardless of UGT1A1 genotype. This study suggests that IREC is a promising second-line chemotherapy for refractory or relapsed neuroblastoma.
Collapse
Affiliation(s)
- Masayuki Imaya
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hideki Muramatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Atsushi Narita
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Ayako Yamamori
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Manabu Wakamatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Taro Yoshida
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shunsuke Miwata
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kotaro Narita
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Daisuke Ichikawa
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Motoharu Hamada
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Eri Nishikawa
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Nozomu Kawashima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Nobuhiro Nishio
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan.,Department of Advanced Medicine, Center for Advanced Medicine and Clinical Research, Nagoya University Hospital, Nagoya, Japan
| | - Seiji Kojima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yoshiyuki Takahashi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| |
Collapse
|
38
|
Baker MAB, Kojima S, Nord AL, Partridge JD. Editorial: Flagellar Motors and Force Sensing in Bacteria. Front Microbiol 2022; 13:833011. [PMID: 35185851 PMCID: PMC8854985 DOI: 10.3389/fmicb.2022.833011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 01/13/2022] [Indexed: 11/13/2022] Open
Affiliation(s)
- Matthew A. B. Baker
- School of Biotechnology and Biomolecular Sciences (BABS), University of New South Wales, Sydney, NSW, Australia
- *Correspondence: Matthew A. B. Baker
| | - Seiji Kojima
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
- Seiji Kojima
| | - Ashley L. Nord
- Centre de Biochimie Structurale de Montpellier, Montpellier, France
- Ashley L. Nord
| | | |
Collapse
|
39
|
Kobayashi A, Ohtaka R, Toki T, Hara J, Muramatsu H, Kanezaki R, Takahashi Y, Sato T, Kamio T, Kudo K, Sasaki S, Yoshida T, Utsugisawa T, Kanno H, Yoshida K, Nannya Y, Takahashi Y, Kojima S, Miyano S, Ogawa S, Terui K, Ito E. Dyserythropoietic anaemia with an intronic
GATA1
splicing mutation in patients suspected to have Diamond‐Blackfan anaemia. eJHaem 2022; 3:163-167. [PMID: 35846220 PMCID: PMC9175706 DOI: 10.1002/jha2.374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/08/2021] [Accepted: 12/10/2021] [Indexed: 11/30/2022]
Abstract
Diamond‐Blackfan anaemia (DBA) shares clinical features with two recently reported sporadic cases of dyserythropoietic anaemia with a cryptic GATA1 splicing mutation (c.871‐24 C>T). We hypothesized that some patients clinically diagnosed with DBA but whose causative genes were unknown may carry the intronic GATA1 mutation. Here, we examined 79 patients in our DBA cohort, who had no detectable causative genes. The intronic GATA1 mutation was identified in two male patients sharing the same pedigree that included multiple cases with anaemia. Cosegregation of this mutation and disease in multiple family members provide evidence to support the pathogenicity of the intronic GATA1 mutation.
Collapse
Affiliation(s)
- Akie Kobayashi
- Department of Pediatrics Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Ryusei Ohtaka
- Department of Pediatrics Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Tsutomu Toki
- Department of Pediatrics Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Junichi Hara
- Department of Pediatric Hematology and Oncology Osaka City General Hospital Osaka Japan
| | - Hideki Muramatsu
- Department of Pediatrics Nagoya University Graduate School of Medicine Nagoya Japan
| | - Rika Kanezaki
- Department of Pediatrics Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Yuka Takahashi
- Department of Pediatrics Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Tomohiko Sato
- Department of Pediatrics Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Takuya Kamio
- Department of Pediatrics Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Ko Kudo
- Department of Pediatrics Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Shinya Sasaki
- Department of Pediatrics Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Taro Yoshida
- Department of Pediatrics Nagoya University Graduate School of Medicine Nagoya Japan
| | - Taiju Utsugisawa
- Department of Transfusion Medicine and Cell Processing Faculty of Medicine Tokyo Women's Medical University Tokyo Japan
| | - Hitoshi Kanno
- Department of Transfusion Medicine and Cell Processing Faculty of Medicine Tokyo Women's Medical University Tokyo Japan
| | - Kenichi Yoshida
- Department of Pathology and Tumor Biology Graduate School of Medicine Kyoto University Kyoto Japan
| | - Yasuhito Nannya
- Department of Pathology and Tumor Biology Graduate School of Medicine Kyoto University Kyoto Japan
- Division of Hematopoietic Disease Control Institute of Medical Science The University of Tokyo Tokyo Japan
| | - Yoshiyuki Takahashi
- Department of Pediatrics Nagoya University Graduate School of Medicine Nagoya Japan
| | - Seiji Kojima
- Department of Pediatrics Nagoya University Graduate School of Medicine Nagoya Japan
| | - Satoru Miyano
- M&D Data Science Center Tokyo Medical and Dental University Tokyo Japan
| | - Seishi Ogawa
- Department of Pathology and Tumor Biology Graduate School of Medicine Kyoto University Kyoto Japan
- Department of Medicine Center for Hematology and Regenerative Medicine Karolinska Institute Stockholm Sweden
| | - Kiminori Terui
- Department of Pediatrics Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Etsuro Ito
- Department of Pediatrics Hirosaki University Graduate School of Medicine Hirosaki Japan
- Department of Community Medicine Hirosaki University Graduate School of Medicine Hirosaki Japan
| |
Collapse
|
40
|
Homma M, Kojima S. Roles of the second messenger c‐di‐GMP in bacteria: Focusing on the topics of flagellar regulation and
Vibrio
spp. Genes Cells 2022; 27:157-172. [PMID: 35073606 PMCID: PMC9303241 DOI: 10.1111/gtc.12921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 12/28/2021] [Accepted: 01/10/2022] [Indexed: 11/30/2022]
Abstract
Typical second messengers include cyclic AMP (cAMP), cyclic GMP (cGMP), and inositol phosphate. In bacteria, cyclic diguanylate (c‐di‐GMP), which is not used in animals, is widely used as a second messenger for environmental responses. Initially found as a regulator of cellulose synthesis, this small molecule is known to be widely present in bacteria. A wide variety of synthesis and degradation enzymes for c‐di‐GMP exist, and the activities of effector proteins are regulated by changing the cellular c‐di‐GMP concentration in response to the environment. It has been shown well that c‐di‐GMP plays an essential role in pathogenic cycle and is involved in flagellar motility in Vibrio cholerae. In this review, we aim to explain the direct or indirect regulatory mechanisms of c‐di‐GMP in bacteria, focusing on the study of c‐di‐GMP in Vibrio spp. and in flagella, which are our research subjects.
Collapse
Affiliation(s)
- Michio Homma
- Division of Biological Science Graduate School of Science Nagoya University Nagoya Japan
| | - Seiji Kojima
- Division of Biological Science Graduate School of Science Nagoya University Nagoya Japan
| |
Collapse
|
41
|
Nishikino T, Sagara Y, Terashima H, Homma M, Kojima S. Hoop-like role of the cytosolic interface helix in Vibrio PomA, an ion-conducting membrane protein, in the bacterial flagellar motor. J Biochem 2022; 171:443-450. [PMID: 35015887 DOI: 10.1093/jb/mvac001] [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: 11/19/2021] [Accepted: 01/04/2022] [Indexed: 11/13/2022] Open
Abstract
Vibrio has a polar flagellum driven by sodium ions for swimming. The force-generating stator unit consists of PomA and PomB. PomA contains four-transmembrane regions and a cytoplasmic domain of approximately 100 residues which interacts with the rotor protein, FliG, to be important for the force generation of rotation. The three-dimensional structure of the stator shows that the cytosolic interface (CI) helix of PomA is located parallel to the inner membrane. In this study, we investigated the function of CI helix and its role as stator. Systematic proline mutagenesis showed that residues K64, F66, and M67 were important for this function. The mutant stators did not assemble around the rotor. Moreover, the growth defect caused by PomB plug deletion was suppressed by these mutations. We speculate that the mutations affect the structure of the helices extending from TM3 and TM4 and reduce the structural stability of the stator complex. This study suggests that the helices parallel to the inner membrane play important roles in various processes, such as the hoop-like function in securing the stability of the stator complex and the ion conduction pathway, which may lead to the elucidation of the ion permeation and assembly mechanism of the stator.
Collapse
Affiliation(s)
- Tatsuro Nishikino
- Institute for protein research, Osaka University, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yugo Sagara
- Division of Biological Science, Graduate School of Science, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan
| | - Hiroyuki Terashima
- Division of Biological Science, Graduate School of Science, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan.,Department of bacteriology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
| | - Michio Homma
- Division of Biological Science, Graduate School of Science, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan
| | - Seiji Kojima
- Division of Biological Science, Graduate School of Science, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan
| |
Collapse
|
42
|
Lin TS, Kojima S, Fukuoka H, Ishijima A, Homma M, Lo CJ. Stator Dynamics Depending on Sodium Concentration in Sodium-Driven Bacterial Flagellar Motors. Front Microbiol 2021; 12:765739. [PMID: 34899649 PMCID: PMC8661058 DOI: 10.3389/fmicb.2021.765739] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 10/19/2021] [Indexed: 11/17/2022] Open
Abstract
Bacterial flagellar motor (BFM) is a large membrane-spanning molecular rotary machine for swimming motility. Torque is generated by the interaction between the rotor and multiple stator units powered by ion-motive force (IMF). The number of bound stator units is dynamically changed in response to the external load and the IMF. However, the detailed dynamics of stator unit exchange process remains unclear. Here, we directly measured the speed changes of sodium-driven chimeric BFMs under fast perfusion of different sodium concentration conditions using computer-controlled, high-throughput microfluidic devices. We found the sodium-driven chimeric BFMs maintained constant speed over a wide range of sodium concentrations by adjusting stator units in compensation to the sodium-motive force (SMF) changes. The BFM has the maximum number of stator units and is most stable at 5 mM sodium concentration rather than higher sodium concentration. Upon rapid exchange from high to low sodium concentration, the number of functional stator units shows a rapidly excessive reduction and then resurrection that is different from predictions of simple absorption model. This may imply the existence of a metastable hidden state of the stator unit during the sudden loss of sodium ions.
Collapse
Affiliation(s)
- Tsai-Shun Lin
- Department of Physics and Center for Complex Systems, National Central University, Taoyuan City, Taiwan
| | - Seiji Kojima
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
| | - Hajime Fukuoka
- Graduate School of Frontier Biosciences, Osaka University, Suita, Japan
| | - Akihiko Ishijima
- Graduate School of Frontier Biosciences, Osaka University, Suita, Japan
| | - Michio Homma
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
| | - Chien-Jung Lo
- Department of Physics and Center for Complex Systems, National Central University, Taoyuan City, Taiwan
| |
Collapse
|
43
|
Homma M, Nishikino T, Kojima S. Achievements in bacterial flagellar research with focus on Vibrio species. Microbiol Immunol 2021; 66:75-95. [PMID: 34842307 DOI: 10.1111/1348-0421.12954] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 11/24/2021] [Accepted: 11/25/2021] [Indexed: 12/01/2022]
Abstract
In 1980's, the most genes involved in the bacterial flagellar function and formation had been isolated though many of their functions or roles were not clarified. Bacterial flagella are the primary locomotive organ and are not necessary for growing in vitro but are probably essential for living in natural condition and are involved in the pathogenicity. In vitro, the flagella-deficient strains can grow at rates similar to wild-type strains. More than 50 genes are responsible for flagellar function, and the flagellum is constructed by more than 20 structural proteins. The maintenance cost of flagellum is high as several genes are required for its development. The fact that it evolved as a motor organ even with such the high cost shows that the motility is indispensable to survive under the harsh environment of Earth. In this review, we focus on flagella-related research conducted by the authors for about 40 years and flagellar research focused on Vibrio spp. This article is protected by copyright. All rights reserved.
Collapse
Affiliation(s)
- Michio Homma
- Division of Biological Science, Graduate School of Science, Nagoya University
| | | | - Seiji Kojima
- Division of Biological Science, Graduate School of Science, Nagoya University
| |
Collapse
|
44
|
Hama A, Hasegawa D, Manabe A, Nozawa K, Narita A, Muramatsu H, Kosaka Y, Kobayashi M, Koh K, Takahashi Y, Watanabe K, Ohara A, Ito M, Kojima S. Prospective validation of the provisional entity of refractory cytopenia of childhood, proposed by the World Health Organization. Br J Haematol 2021; 196:1031-1039. [PMID: 34729770 DOI: 10.1111/bjh.17921] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/28/2021] [Accepted: 10/13/2021] [Indexed: 11/29/2022]
Abstract
In 2008, the World Health Organization proposed a new entity of childhood myelodysplastic syndrome (MDS), which was referred to as refractory cytopenia of childhood (RCC). However, whether this morphological classification reflects clinical outcomes remains unclear. We performed a prospective evaluation of bone marrow morphology in 252 children with acquired bone marrow failure between 2009 and 2013. Of 252 patients, 63 were diagnosed with aplastic anaemia (AA), 131 with RCC without multilineage dysplasia (RCC-w/o-MLD) and 58 with RCC with MLD (RCC-MLD). One patient with AA, three with RCC-w/o-MLD and nine with RCC-MLD presented with chromosomal abnormalities at diagnosis (P = 0·001). The response rates to immunosuppressive therapy (IST) at 6 months and the cumulative incidence of clonal evolution at 5 years did not significantly differ among the three groups. A multivariate analysis revealed that the morphological classification of RCC-MLD was a significant risk factor for secondary graft failure after haematopoietic cell transplantation (HCT) (P = 0·003). In view of these findings, RCC could be divided into two categories, RCC-w/o-MLD and RCC-MLD, because children with this condition exhibited a distinct morphology, frequent chromosomal abnormalities at diagnosis and a high frequency of secondary graft failure after HCT.
Collapse
Affiliation(s)
- Asahito Hama
- Department of Paediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan.,Department of Haematology and Oncology, Children's Medical Centre, Japanese Red Cross Aichi Medical Centre Nagoya First Hospital, Nagoya, Japan
| | - Daisuke Hasegawa
- Department of Paediatrics, St. Luke's International Hospital, Tokyo, Japan
| | - Atsushi Manabe
- Department of Paediatrics, St. Luke's International Hospital, Tokyo, Japan.,Department of Paediatrics, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Kazue Nozawa
- Department of Laboratory Medicine, St. Luke's International Hospital, Tokyo, Japan
| | - Atsushi Narita
- Department of Paediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hideki Muramatsu
- Department of Paediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yoshiyuki Kosaka
- Department of Haematology/Oncology, Hyogo Prefectural Kobe Children's Hospital, Kobe, Japan
| | - Masao Kobayashi
- Department of Paediatrics, Hiroshima University Graduate School of Biomedical & Health Sciences, Hiroshima, Japan
| | - Katsuyoshi Koh
- Department of Haematology/Oncology, Saitama Children's Medical Centre, Saitama, Japan
| | - Yoshiyuki Takahashi
- Department of Paediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kenichiro Watanabe
- Department of Haematology and Oncology, Shizuoka Children's Hospital, Shizuoka, Japan
| | - Akira Ohara
- Department of Paediatrics, Toho University School of Medicine, Tokyo, Japan
| | - Masafumi Ito
- Department of Pathology, Japanese Red Cross Aichi Medical Centre Nagoya First Hospital, Nagoya, Japan
| | - Seiji Kojima
- Department of Paediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| |
Collapse
|
45
|
Boulay F, Simpson GS, Ichikawa Y, Kisyov S, Bucurescu D, Takamine A, Ahn DS, Asahi K, Baba H, Balabanski DL, Egami T, Fujita T, Fukuda N, Funayama C, Furukawa T, Georgiev G, Gladkov A, Hass M, Imamura K, Inabe N, Ishibashi Y, Kawaguchi T, Kawamura T, Kim W, Kobayashi Y, Kojima S, Kusoglu A, Lozeva R, Momiyama S, Mukul I, Niikura M, Nishibata H, Nishizaka T, Odahara A, Ohtomo Y, Ralet D, Sato T, Shimizu Y, Sumikama T, Suzuki H, Takeda H, Tao LC, Togano Y, Tominaga D, Ueno H, Yamazaki H, Yang XF, Daugas JM. Boulay et al. Reply. Phys Rev Lett 2021; 127:169202. [PMID: 34723612 DOI: 10.1103/physrevlett.127.169202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 08/31/2021] [Indexed: 06/13/2023]
Affiliation(s)
- F Boulay
- CEA, DAM, DIF, 91297 Arpajon cedex, France
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- GANIL, CEA/DSM-CNRS/IN2P3, BP55027, 14076 Caen cedex 5, France
| | - G S Simpson
- LPSC, CNRS/IN2P3, Université Joseph Fourier Grenoble 1, INPG, 38026 Grenoble Cedex, France
| | - Y Ichikawa
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - S Kisyov
- Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH), 077125 Bucharest-Măgurele, Romania
| | - D Bucurescu
- Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH), 077125 Bucharest-Măgurele, Romania
| | - A Takamine
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - D S Ahn
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - K Asahi
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro, Tokyo 152-8551, Japan
| | - H Baba
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - D L Balabanski
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Extreme Light Infrastructure-Nuclear Physics (ELI-NP), Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH), 077125 Bucharest-Măgurele, Romania
| | - T Egami
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Advanced Sciences, Hosei University, 3-7-2 Kajino-cho, Koganei, Tokyo 184-8584, Japan
| | - T Fujita
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, Osaka University, Machikaneyama 1-1 Toyonaka, Osaka 560-0034, Japan
| | - N Fukuda
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - C Funayama
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro, Tokyo 152-8551, Japan
| | - T Furukawa
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji, Tokyo 192-0397, Japan
| | - G Georgiev
- CSNSM, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay Campus, France
| | - A Gladkov
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 702-701, South Korea
| | - M Hass
- Department of Particle Physics, Weizmann Institute of Science, Rehovot 76100, Israel
| | - K Imamura
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, Meiji University, 1-1-1 Higashi-Mita, Tama, Kawasaki, Kanagawa 214-8571, Japan
| | - N Inabe
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Y Ishibashi
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-5877, Japan
| | - T Kawaguchi
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Advanced Sciences, Hosei University, 3-7-2 Kajino-cho, Koganei, Tokyo 184-8584, Japan
| | - T Kawamura
- Department of Physics, Osaka University, Machikaneyama 1-1 Toyonaka, Osaka 560-0034, Japan
| | - W Kim
- Department of Physics, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 702-701, South Korea
| | - Y Kobayashi
- Department of Informatics and Engineering, University of Electro-Communication, 1-5-1 Chofugaoka, Chohu, Tokyo 182-8585, Japan
| | - S Kojima
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro, Tokyo 152-8551, Japan
| | - A Kusoglu
- CSNSM, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay Campus, France
- Department of Physics, Faculty of Science, Istanbul University, Vezneciler/Faith, 34134 Istanbul, Turkey
| | - R Lozeva
- CSNSM, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay Campus, France
| | - S Momiyama
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - I Mukul
- Department of Particle Physics, Weizmann Institute of Science, Rehovot 76100, Israel
| | - M Niikura
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - H Nishibata
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, Osaka University, Machikaneyama 1-1 Toyonaka, Osaka 560-0034, Japan
| | - T Nishizaka
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Advanced Sciences, Hosei University, 3-7-2 Kajino-cho, Koganei, Tokyo 184-8584, Japan
| | - A Odahara
- Department of Physics, Osaka University, Machikaneyama 1-1 Toyonaka, Osaka 560-0034, Japan
| | - Y Ohtomo
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro, Tokyo 152-8551, Japan
| | - D Ralet
- CSNSM, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay Campus, France
| | - T Sato
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro, Tokyo 152-8551, Japan
| | - Y Shimizu
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - T Sumikama
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - H Suzuki
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - H Takeda
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - L C Tao
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - Y Togano
- Department of Physics, Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro, Tokyo 152-8551, Japan
| | - D Tominaga
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Advanced Sciences, Hosei University, 3-7-2 Kajino-cho, Koganei, Tokyo 184-8584, Japan
| | - H Ueno
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - H Yamazaki
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - X F Yang
- Instituut voor Kern-en Stralingsfysica, K.U. Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
| | - J M Daugas
- CEA, DAM, DIF, 91297 Arpajon cedex, France
- RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| |
Collapse
|
46
|
Takekawa N, Nishikino T, Hori K, Kojima S, Imada K, Homma M. ZomB is essential for chemotaxis of Vibrio alginolyticus by the rotational direction control of the polar flagellar motor. Genes Cells 2021; 26:927-937. [PMID: 34487583 DOI: 10.1111/gtc.12895] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 08/30/2021] [Accepted: 09/01/2021] [Indexed: 11/28/2022]
Abstract
Bacteria exhibit chemotaxis by controlling flagellar rotation to move toward preferred places or away from nonpreferred places. The change in rotation is triggered by the binding of the chemotaxis signaling protein CheY-phosphate (CheY-P) to the C-ring in the flagellar motor. Some specific bacteria, including Vibrio spp. and Shewanella spp., have a single transmembrane protein called ZomB. ZomB is essential for controlling the flagellar rotational direction in Shewanella putrefaciens and Vibrio parahaemolyticus. In this study, we confirmed that the zomB deletion results only in the counterclockwise (CCW) rotation of the motor in Vibrio alginolyticus as previously reported in other bacteria. We found that ZomB is not required for a clockwise-locked phenotype caused by mutations in fliG and fliM, and that ZomB is essential for CW rotation induced by overproduction of CheY-P. Purified ZomB proteins form multimers, suggesting that ZomB may function as a homo-oligomer. These observations imply that ZomB interacts with protein(s) involved in either flagellar motor rotation, chemotaxis, or both. We provide the evidence that ZomB is a new player in chemotaxis and is required for the rotational control in addition to CheY in Vibrio alginolyticus.
Collapse
Affiliation(s)
- Norihiro Takekawa
- Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Japan
| | - Tatsuro Nishikino
- Research Center for Next-Generation Protein Sciences, Institute for Protein Research, Osaka University, Suita, Japan
| | - Kiyoshiro Hori
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
| | - Seiji Kojima
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
| | - Katsumi Imada
- Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Japan
| | - Michio Homma
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
| |
Collapse
|
47
|
Miwata S, Narita A, Okuno Y, Suzuki K, Hamada M, Yoshida T, Imaya M, Yamamori A, Wakamatsu M, Narita K, Kitazawa H, Ichikawa D, Taniguchi R, Kawashima N, Nishikawa E, Nishio N, Kojima S, Muramatsu H, Takahashi Y. Clinical diagnostic value of telomere length measurement in inherited bone marrow failure syndromes. Haematologica 2021; 106:2511-2515. [PMID: 33882640 PMCID: PMC8409025 DOI: 10.3324/haematol.2021.278334] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Indexed: 01/14/2023] Open
Affiliation(s)
- Shunsuke Miwata
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Atsushi Narita
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Yusuke Okuno
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan; Center for Advanced Medicine and Clinical Research, Nagoya University Hospital, Nagoya
| | - Kyogo Suzuki
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Motoharu Hamada
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Taro Yoshida
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Masayuki Imaya
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Ayako Yamamori
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Manabu Wakamatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Kotaro Narita
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Hironobu Kitazawa
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Daisuke Ichikawa
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Rieko Taniguchi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Nozomu Kawashima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Eri Nishikawa
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Nobuhiro Nishio
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan; Center for Advanced Medicine and Clinical Research, Nagoya University Hospital, Nagoya
| | - Seiji Kojima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya
| | - Hideki Muramatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya.
| | - Yoshiyuki Takahashi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya.
| |
Collapse
|
48
|
Delgado-Aparicio LF, VanMeter P, Barbui T, Chellai O, Wallace J, Yamazaki H, Kojima S, Almagari AF, Hurst NC, Chapman BE, McCollam KJ, Den Hartog DJ, Sarff JS, Reusch LM, Pablant N, Hill K, Bitter M, Ono M, Stratton B, Takase Y, Luethi B, Rissi M, Donath T, Hofer P, Pilet N. Multi-energy reconstructions, central electron temperature measurements, and early detection of the birth and growth of runaway electrons using a versatile soft x-ray pinhole camera at MST. Rev Sci Instrum 2021; 92:073502. [PMID: 34340413 DOI: 10.1063/5.0043672] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 04/26/2021] [Indexed: 06/13/2023]
Abstract
A multi-energy soft x-ray pinhole camera has been designed, built, and deployed at the Madison Symmetric Torus to aid the study of particle and thermal transport, as well as MHD stability physics. This novel imaging diagnostic technique employs a pixelated x-ray detector in which the lower energy threshold for photon detection can be adjusted independently on each pixel. The detector of choice is a PILATUS3 100 K with a 450 μm thick silicon sensor and nearly 100 000 pixels sensitive to photon energies between 1.6 and 30 keV. An ensemble of cubic spline smoothing functions has been applied to the line-integrated data for each time-frame and energy-range, obtaining a reduced standard-deviation when compared to that dominated by photon-noise. The multi-energy local emissivity profiles are obtained from a 1D matrix-based Abel-inversion procedure. Central values of Te can be obtained by modeling the slope of the continuum radiation from ratios of the inverted radial emissivity profiles over multiple energy ranges with no a priori assumptions of plasma profiles, magnetic field reconstruction constraints, high-density limitations, or need of shot-to-shot reproducibility. In tokamak plasmas, a novel application has recently been tested for early detection, 1D imaging, and study of the birth, exponential growth, and saturation of runaway electrons at energies comparable to 100 × Te,0; thus, early results are also presented.
Collapse
Affiliation(s)
| | - P VanMeter
- University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - T Barbui
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540, USA
| | - O Chellai
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540, USA
| | - J Wallace
- University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - H Yamazaki
- National Institutes for Quantum and Radiological Science and Technology, Naka, Ibaraki 311-0193, Japan
| | - S Kojima
- Kyushu University, Kasuga-kouen 6-1, Kasuga, Japan
| | - A F Almagari
- University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - N C Hurst
- University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - B E Chapman
- University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - K J McCollam
- University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - D J Den Hartog
- University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - J S Sarff
- University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - L M Reusch
- Edgewood College, Madison, Wisconsin 53711, USA
| | - N Pablant
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540, USA
| | - K Hill
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540, USA
| | - M Bitter
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540, USA
| | - M Ono
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540, USA
| | - B Stratton
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540, USA
| | - Y Takase
- The University of Tokyo, Kashiwa 277-8561, Japan
| | - B Luethi
- DECTRIS Ltd., 5405 Baden-Dättwil, Switzerland
| | - M Rissi
- DECTRIS Ltd., 5405 Baden-Dättwil, Switzerland
| | - T Donath
- DECTRIS Ltd., 5405 Baden-Dättwil, Switzerland
| | - P Hofer
- DECTRIS Ltd., 5405 Baden-Dättwil, Switzerland
| | - N Pilet
- DECTRIS Ltd., 5405 Baden-Dättwil, Switzerland
| |
Collapse
|
49
|
Taniguchi R, Muramatsu H, Okuno Y, Yoshida T, Wakamatsu M, Hamada M, Shirota C, Sumida W, Hinoki A, Tainaka T, Gotoh Y, Tsuzuki T, Tanaka Y, Kojima S, Uchida H, Takahashi Y. A patient with very early onset FH-deficient renal cell carcinoma diagnosed at age seven. Fam Cancer 2021; 21:337-341. [PMID: 34156580 DOI: 10.1007/s10689-021-00268-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 06/13/2021] [Indexed: 12/20/2022]
Abstract
Hereditary leiomyomatosis and renal cell cancer (HLRCC) is caused by heterozygous germline variants in the fumarate hydratase (FH) gene and is associated with increased susceptibility to cutaneous leiomyomas, uterine leiomyomas, and renal cell carcinoma (RCC). HLRCC-associated RCC usually occurs in the middle age, with the median age being 40-44 years. This report describes a seven-year-old (84-month-old) male who developed a large right kidney tumor with multiple cystic lesions that contained enhanced solid components. There was no evidence of distant metastasis. The male patient underwent right nephrectomy and has been recovering well without metastasis or recurrence. Pathological examination revealed that tumor cells with relatively prominent nucleoli and surrounded by halos, were located in a limited area. Immunohistochemical staining was negative for FH. Whole-exome sequencing identified his germline variant in the FH gene and its loss of heterozygosity in the tumor. At nine years (114 months) of age, the male patient showed no recurrence of the tumor. This was the youngest-onset case of HLRCC-associated RCC to date. This report may affect the starting age for future RCC-surveillance programs for patients with HLRCC.
Collapse
Affiliation(s)
- Rieko Taniguchi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Hideki Muramatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan.
| | - Yusuke Okuno
- Medical Genomics Center, Nagoya University Hospital, Nagoya, Japan
| | - Taro Yoshida
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Manabu Wakamatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Motoharu Hamada
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Chiyoe Shirota
- Department of Pediatric Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Wataru Sumida
- Department of Pediatric Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Akinari Hinoki
- Department of Rare/ Intractable Cancer Analysis Research, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Takahisa Tainaka
- Department of Pediatric Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yoshimitsu Gotoh
- Department of Pediatric Nephrology, Japanese Red Cross Nagoya Daini Hospital, Nagoya, Japan
| | - Toyonori Tsuzuki
- Department of Surgical Pathology, Aichi Medical University Hospital, Nagakute, Japan
| | - Yukichi Tanaka
- Department of Pathology, Kanagawa Children's Medical Center, Kanagawa, Japan
| | - Seiji Kojima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Hiroo Uchida
- Department of Pediatric Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yoshiyuki Takahashi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan.
| |
Collapse
|
50
|
Takekawa N, Nishikino T, Yamashita T, Hori K, Onoue Y, Ihara K, Kojima S, Homma M, Imada K. A slight bending of an α-helix in FliM creates a counterclockwise-locked structure of the flagellar motor in Vibrio. J Biochem 2021; 170:531-538. [PMID: 34143212 DOI: 10.1093/jb/mvab074] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Accepted: 06/01/2021] [Indexed: 11/13/2022] Open
Abstract
Many bacteria swim by rotating flagella. The chemotaxis system controls the direction of flagellar rotation. Vibrio alginolyticus, which has a single polar flagellum, swims smoothly by rotating the flagellar motor counterclockwise (CCW) in response to attractants. In response to repellents, the motor frequently switches its rotational direction between CCW and clockwise (CW). We isolated a mutant strain that swims with a CW-locked rotation of the flagellum, which pulls rather than pushes the cell. This CW phenotype arises from a R49P substitution in FliM, which is the component in the C-ring of the motor that binds the chemotaxis signaling protein, phosphorylated CheY. However, this phenotype is independent of CheY, indicating that the mutation produces a CW conformation of the C-ring in the absence of CheY. The crystal structure of FliM with the R49P substitution showed a conformational change in the N-terminal α-helix of the middle domain of FliM (FliMM). This helix should mediates FliM-FliM interaction. The structural models of wild-type and mutant C-ring showed that the relatively small conformational change in FliMM induces a drastic rearrangement of the conformation of the FliMM domain that generates a CW conformation of the C-ring.
Collapse
Affiliation(s)
- Norihiro Takekawa
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Tatsuro Nishikino
- Division of Biological Science, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan.,Research Center for Next-Generation Protein Sciences, Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Toshiki Yamashita
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Kiyoshiro Hori
- Division of Biological Science, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| | - Yasuhiro Onoue
- Division of Biological Science, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| | - Kunio Ihara
- Center for Gene Research, Nagoya University, Furocho, Nagoya, Aichi 464-8602, Japan
| | - Seiji Kojima
- Division of Biological Science, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| | - Michio Homma
- Division of Biological Science, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| | - Katsumi Imada
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| |
Collapse
|