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Nakada M, Ishida H, Uchiyama H, Ota R, Ogura T, Namiki Y. Disaggregation and fibrillation during sol-gel transition of alginate hydrogels. Int J Biol Macromol 2024:131890. [PMID: 38692534 DOI: 10.1016/j.ijbiomac.2024.131890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Revised: 03/27/2024] [Accepted: 04/24/2024] [Indexed: 05/03/2024]
Abstract
The rheological and morphological characteristics of Ca-crosslinked alginate hydrogels with two different M/G ratios, α-L-guluronate (G)-rich and β-D-mannuronate (M)-rich, each with one alginic acid concentration, were investigated. It was found that the stiffness and elasticity of alginate hydrogels are derived from the thickness and density of the fibril network structures. In aqueous alginate solution, ball-like aggregates of alginates are present. Time-resolved small-angle X-ray scattering and time-domain nuclear magnetic resonance measurements suggest that the disaggregation of alginate aggregates and loose fibrillation occur in the early stage of the sol-gel transition. After these induction stage, direct gelation is finally caused by the formation of the egg-box junction. G-rich alginate hydrogel has a higher stiffness and a thicker and denser fibril network structure than M-rich alginate hydrogel. The former also exhibits faster and more significant changes in physical properties during the sol-gel transition.
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Affiliation(s)
- Masaru Nakada
- Toray Research Center, Inc., 2-11 Sonoyama 3-chome, Otsu 520-8567, Shiga, Japan.
| | - Hiroyuki Ishida
- Toray Research Center, Inc., 2-11 Sonoyama 3-chome, Otsu 520-8567, Shiga, Japan
| | - Hironobu Uchiyama
- Toray Research Center, Inc., 2-11 Sonoyama 3-chome, Otsu 520-8567, Shiga, Japan
| | - Rena Ota
- Toray Research Center, Inc., 2-11 Sonoyama 3-chome, Otsu 520-8567, Shiga, Japan
| | - Toshihiko Ogura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, Higashi, Tsukuba 305-8566, Ibaraki, Japan
| | - Yusuke Namiki
- KIMICA Corporation, 2-1-1 Yaesu, Chuo-ku, 104-0028 Tokyo, Japan
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Miyashita SI, Ogura T, Matsuura SI, Fukuda E. Particle Size Measurement and Detection of Bound Proteins of Non-Porous/Mesoporous Silica Microspheres by Single-Particle Inductively Coupled Plasma Mass Spectrometry. Molecules 2024; 29:1086. [PMID: 38474598 DOI: 10.3390/molecules29051086] [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: 02/05/2024] [Revised: 02/23/2024] [Accepted: 02/26/2024] [Indexed: 03/14/2024] Open
Abstract
Single-particle inductively coupled plasma mass spectrometry (spICP-MS) has been used for particle size measurement of diverse types of individual nanoparticles and micrometer-sized carbon-based particles such as microplastics. However, its applicability to the measurement of micrometer-sized non-carbon-based particles such as silica (SiO2) particles is unclear. In this study, the applicability of spICP-MS to particle size measurement of non-porous/mesoporous SiO2 microspheres with a nominal diameter of 5.0 µm or smaller was investigated. Particle sizes of these microspheres were measured using both spICP-MS based on a conventional calibration approach using an ion standard solution and scanning electron microscopy as a reference technique, and the results were compared. The particle size distributions obtained using both techniques were in agreement within analytical uncertainty. The applicability of this technique to the detection of metal-containing protein-binding mesoporous SiO2 microspheres was also investigated. Bound iron (Fe)-containing proteins (i.e., lactoferrin and transferrin) of mesoporous SiO2 microspheres were detected using Fe as a presence marker for the proteins. Thus, spICP-MS is applicable to the particle size measurement of large-sized and non-porous/mesoporous SiO2 microspheres. It has considerable potential for element-based detection and qualification of bound proteins of mesoporous SiO2 microspheres in a variety of applications.
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Affiliation(s)
- Shin-Ichi Miyashita
- National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba 305-8563, Ibaraki, Japan
| | - Toshihiko Ogura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba 305-8566, Ibaraki, Japan
| | - Shun-Ichi Matsuura
- Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology (AIST), 4-2-1 Nigatake, Miyagino-ku, Sendai 983-8551, Miyagi, Japan
| | - Eriko Fukuda
- Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba 305-8565, Ibaraki, Japan
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Mastrangelo R, Okada T, Ogura T, Ogura T, Baglioni P. Direct observation of the effects of chemical fixation in MNT-1 cells: A SE-ADM and Raman study. Proc Natl Acad Sci U S A 2023; 120:e2308088120. [PMID: 38091295 PMCID: PMC10743460 DOI: 10.1073/pnas.2308088120] [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: 05/15/2023] [Accepted: 10/16/2023] [Indexed: 12/18/2023] Open
Abstract
Aldehydes fixation was accidentally discovered in the early 20th century and soon became a widely adopted practice in the histological field, due to an excellent staining enhancement in tissues imaging. However, the fixation process itself entails cell proteins denaturation and crosslinking. The possible presence of artifacts, that depends on the specific system under observation, must therefore be considered to avoid data misinterpretation. This contribution takes advantage of scanning electron assisted-dielectric microscopy (SE-ADM) and Raman 2D imaging to reveal the possible presence and the nature of artifacts in unstained, and paraformldehyde, PFA, fixed MNT-1 cells. The high resolution of the innovative SE-ADM technique allowed the identification of globular protein clusters in the cell cytoplasm, formed after protein denaturation and crosslinking. Concurrently, SE-ADM images showed a preferential melanosome adsorption on the cluster's outer surface. The micron-sized aggregates were discernible in Raman 2D images, as the melanosomes signal, extracted through 2D principal component analysis, unequivocally mapped their location and distribution within the cells, appearing randomly distributed in the cytoplasm. Protein clusters were not observed in living MNT-1 cells. In this case, mature melanosomes accumulate preferentially at the cell periphery and are more closely packed than in fixed cells. Our results show that, although PFA does not affect the melanin structure, it disrupts melanosome distribution within the cells. Proteins secondary structure, conversely, is partially lost, as shown by the Raman signals related to α-helix, β-sheets, and specific amino acids that significantly decrease after the PFA treatment.
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Affiliation(s)
- Rosangela Mastrangelo
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba305-8566, Japan
- NIKKOL GROUP Nikko Chemicals Co., Ltd., Tokyo174-0046, Japan
- Department of Chemistry and Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase (Center for Colloid and Surface Science), University of Florence, FlorenceI-50019, Italy
| | - Tomoko Okada
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba305-8566, Japan
| | - Taku Ogura
- NIKKOL GROUP Nikko Chemicals Co., Ltd., Tokyo174-0046, Japan
| | - Toshihiko Ogura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba305-8566, Japan
| | - Piero Baglioni
- Department of Chemistry and Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase (Center for Colloid and Surface Science), University of Florence, FlorenceI-50019, Italy
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Ogura T. Surface light propagating in a dielectric thin film generated via micro-spheres. Opt Express 2023; 31:23198-23211. [PMID: 37475410 DOI: 10.1364/oe.491907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 06/03/2023] [Indexed: 07/22/2023]
Abstract
Light orbiting through total internal reflection within dielectric spheres or disks is called the whispering gallery mode (WGM). Recently, we have reported anomalously enhanced Raman spectra at the periphery of 3 µm diameter polystyrene (PS) microspheres on a silicon nitride (SiN) film using Raman microscopy. Here, we performed Raman measurements and optical simulation analysis of 3 µm PS spheres on a SiN film using a three-dimensional (3D) model and found that the circumferential light was generated up to 650 nm from the outer circumference of the sphere. Furthermore, a portion of the light circling the sphere travelled to the SiN film and became surface propagating light. These properties are expected to lead to development of new devices such as highly sensitive sensors, quantum optical qubits, and optical integrated circuits.
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Ogura T, Okada T, Hatano M, Nakamura M, Agemura T. Development of General-purpose Dielectric Constant Imaging Unit for SEM and Direct Observation of Samples in Aqueous Solution. Microsc Microanal 2023; 29:1037-1046. [PMID: 37749668 DOI: 10.1093/micmic/ozad030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 02/06/2023] [Accepted: 02/22/2023] [Indexed: 09/27/2023]
Abstract
Electron microscopes can observe samples with a spatial resolution of 10 nm or higher; however, they cannot observe samples in solutions due to the vacuum conditions inside the sample chamber. Recently, we developed a scanning electron-assisted dielectric microscope (SE-ADM), based on scanning electron microscope, which enables the observation of various specimens in solution. Until now, the SE-ADM system used a custom-made SE-ADM stage with a built-in amplifier and could not be linked to the scanning electron microscopy (SEM) operation system. Therefore, it was necessary to manually acquire images from the SE-ADM system after setting the EB focus, astigmatism, and observation field-of-view from the SEM operating console. In this study, we developed a general-purpose dielectric constant imaging unit attached to commercially available SEMs. The new SE-ADM unit can be directly attached to the standard stage of an SEM, and the dielectric signal detected from this unit can be input to the external input terminal of the SEM, enabling simultaneous observation yielding SEM and SE-ADM images. Furthermore, 4.5 nm spatial resolution was achieved using a 10 nm thick silicon nitride film in the sample holder in the observation of aggregated PM2.5. We carried out the observation of cultured cells, PM2.5, and clay samples in solution.
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Affiliation(s)
- Toshihiko Ogura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, Higashi 1-1-1, Tsukuba, Ibaraki 305-8566, Japan
| | - Tomoko Okada
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, Higashi 1-1-1, Tsukuba, Ibaraki 305-8566, Japan
| | - Michio Hatano
- Hitachi High-Tech Corporation, Ichige 882, Hitachinaka, Ibaraki 312-8504, Japan
| | - Mitsuhiro Nakamura
- Hitachi High-Tech Corporation, Ichige 882, Hitachinaka, Ibaraki 312-8504, Japan
| | - Toshihide Agemura
- Hitachi High-Tech Corporation, Ichige 882, Hitachinaka, Ibaraki 312-8504, Japan
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Minoda A, Ueda S, Miyashita SI, Ogura T, Natori S, Sun J, Takahashi Y. Reversible adsorption of iridium in lyophilized cells of the unicellular red alga Galdieria sulphuraria. RSC Adv 2023; 13:14217-14223. [PMID: 37179988 PMCID: PMC10168022 DOI: 10.1039/d3ra01249b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 04/27/2023] [Indexed: 05/15/2023] Open
Abstract
Iridium (Ir) is one of the rarest elements in the Earth's crust and is valuable in industry due to its high corrosion resistance. In this study, we used lyophilized cells of a unicellular red alga, Galdieria sulphuraria for the selective recovery of small amounts of Ir from hydrochloric acid (HCl) solutions. The Ir recovery efficiency of the lyophilized cells was higher than that of activated carbon and comparable to that of an ion-exchange resin in up to 0.2 M acid. Lyophilized G. sulphuraria cells showed different selectivity from the ion-exchange resin, adsorbing Ir and Fe in 0.2 M HCl solution while the ion-exchange resin adsorbed Ir and Cd. The adsorbed Ir could be eluted with more than 90% efficiency using HCl, ethylenediaminetetraacetic acid, and potassium hydroxide solutions, but could not be eluted using a thiourea-HCl solution. After the elution of Ir with a 6 M HCl solution, lyophilized cells could be reused up to five times for Ir recovery with over 60% efficiency. Scanning electron-assisted dielectric microscopy and scanning electron microscopy revealed that Ir accumulated in the cytosol of the lyophilized cells. X-ray absorption fine structure analysis demonstrated the formation of an outer-sphere complex between Ir and the cellular residues, suggesting the adsorption via ion exchange, and explaining the ability to elute the Ir and reuse the cells. Our results provide a scientific basis for inexpensive and environmentally friendly biosorbents as an alternative to ion-exchange resins for the recovery of Ir.
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Affiliation(s)
- Ayumi Minoda
- Faculty of Life and Environmental Sciences, University of Tsukuba 1-1-1 Tennodai Tsukuba Ibaragi 305-8572 Japan +81-29-853-6662 +81-29-853-6662
| | - Shuya Ueda
- School of Life and Environmental Sciences, University of Tsukuba 1-1-1 Tennodai Tsukuba Ibaragi 305-8572 Japan
| | - Shin-Ichi Miyashita
- National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Umezono Tsukuba Ibaraki 305-8563 Japan
| | - Toshihiko Ogura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) Central 6, Higashi Tsukuba Ibaraki 305-8566 Japan
| | - Sachika Natori
- Department of Earth and Planetary Science, the University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Jing Sun
- Department of Earth and Planetary Science, the University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Yoshio Takahashi
- Department of Earth and Planetary Science, the University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
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Okada T, Iwayama T, Ogura T, Murakami S, Ogura T. Structural analysis of melanosomes in living mammalian cells using scanning electron-assisted dielectric microscopy with deep neural network. Comput Struct Biotechnol J 2022; 21:506-518. [PMID: 36618988 PMCID: PMC9807747 DOI: 10.1016/j.csbj.2022.12.027] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 12/16/2022] [Accepted: 12/16/2022] [Indexed: 12/23/2022] Open
Abstract
Melanins are the main pigments found in mammals. Their synthesis and transfer to keratinocytes have been widely investigated for many years. However, analysis has been mainly carried out using fixed rather than live cells. In this study, we have analysed the melanosomes in living mammalian cells using newly developed scanning electron-assisted dielectric microscopy (SE-ADM). The melanosomes in human melanoma MNT-1 cells were observed as clear black particles in SE-ADM. The main structure of melanosomes was toroidal while that of normal melanocytes was ellipsoidal. In tyrosinase knockout MNT-1 cells, not only the black particles in the SE-ADM images but also the Raman shift of melanin peaks completely disappeared suggesting that the black particles were really melanosomes. We developed a deep neural network (DNN) system to automatically detect melanosomes in cells and analysed their diameter and roundness. In terms of melanosome morphology, the diameter of melanosomes in melanoma cells did not change while that in normal melanocytes increased during culture. The established DNN analysis system with SE-ADM can be used for other particles, e.g. exosomes, lysosomes, and other biological particles.
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Affiliation(s)
- Tomoko Okada
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, Higashi, Tsukuba, Ibaraki 305-8566, Japan
| | - Tomoaki Iwayama
- Department of Periodontology, Osaka University Graduate School of Dentistry, 1-8 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Taku Ogura
- Chemical Business Unit, Nikko Chemicals Co., Ltd., Itabashi-ku, Tokyo 174-0046, Japan
| | - Shinya Murakami
- Department of Periodontology, Osaka University Graduate School of Dentistry, 1-8 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Toshihiko Ogura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, Higashi, Tsukuba, Ibaraki 305-8566, Japan,Correspondence to: Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Higashi 1-1-1, Tsukuba, Ibaraki 305-8566, Japan.
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Al-Habsi M, Chamoto K, Matsumoto K, Nomura N, Zhang B, Sugiura Y, Sonomura K, Maharani A, Nakajima Y, Wu Y, Nomura Y, Menzies R, Tajima M, Kitaoka K, Haku Y, Delghandi S, Yurimoto K, Matsuda F, Iwata S, Ogura T, Fagarasan S, Honjo T. Spermidine activates mitochondrial trifunctional protein and improves antitumor immunity in mice. Science 2022; 378:eabj3510. [DOI: 10.1126/science.abj3510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Spermidine (SPD) delays age-related pathologies in various organisms. SPD supplementation overcame the impaired immunotherapy against tumors in aged mice by increasing mitochondrial function and activating CD8
+
T cells. Treatment of naïve CD8
+
T cells with SPD acutely enhanced fatty acid oxidation. SPD conjugated to beads bound to the mitochondrial trifunctional protein (MTP). In the MTP complex, synthesized and purified from
Escherichia coli
, SPD bound to the α and β subunits of MTP with strong affinity and allosterically enhanced their enzymatic activities. T cell–specific deletion of the MTP α subunit abolished enhancement of programmed cell death protein 1 (PD-1) blockade immunotherapy by SPD, indicating that MTP is required for SPD-dependent T cell activation.
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Affiliation(s)
- Muna Al-Habsi
- Division of Immunology and Genomic Medicine, Center for Cancer Immunotherapy and Immunobiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- National Genetic Center, Ministry of Health, Muscat, Oman
- Division of Integrated High-Order Regulatory Systems, Center for Cancer Immunotherapy and Immunobiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Kenji Chamoto
- Division of Immunology and Genomic Medicine, Center for Cancer Immunotherapy and Immunobiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Ken Matsumoto
- Department of Developmental Neurobiology, Institute of Development, Aging and Cancer, Tohoku University, Miyagi, Japan
| | - Norimichi Nomura
- Department of Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Baihao Zhang
- Laboratory for Mucosal Immunity, Center for Integrative Medical Sciences, RIKEN Yokohama Institute, Yokohama, Japan
| | - Yuki Sugiura
- Department of Biochemistry, Keio University, Tokyo, Japan
| | - Kazuhiro Sonomura
- Center for Genomic Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- Life Science Research Center, Technology Research Laboratory, Shimadzu Corporation, Kyoto, Japan
| | - Aprilia Maharani
- Division of Immunology and Genomic Medicine, Center for Cancer Immunotherapy and Immunobiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yuka Nakajima
- Division of Immunology and Genomic Medicine, Center for Cancer Immunotherapy and Immunobiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yibo Wu
- YCI Laboratory for Next-Generation Proteomics, Center for Integrative Medical Sciences, RIKEN Yokohama Institute, Yokohama, Japan
- Chemical Biology Mass Spectrometry Platform, Faculty of Science, University of Geneva, Geneva, Switzerland
| | - Yayoi Nomura
- Department of Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Rosemary Menzies
- Division of Immunology and Genomic Medicine, Center for Cancer Immunotherapy and Immunobiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Masaki Tajima
- Division of Integrated High-Order Regulatory Systems, Center for Cancer Immunotherapy and Immunobiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Koji Kitaoka
- Division of Immunology and Genomic Medicine, Center for Cancer Immunotherapy and Immunobiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yasuharu Haku
- Division of Immunology and Genomic Medicine, Center for Cancer Immunotherapy and Immunobiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Sara Delghandi
- Division of Immunology and Genomic Medicine, Center for Cancer Immunotherapy and Immunobiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Keiko Yurimoto
- Division of Immunology and Genomic Medicine, Center for Cancer Immunotherapy and Immunobiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Fumihiko Matsuda
- Center for Genomic Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - So Iwata
- Department of Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Toshihiko Ogura
- Department of Developmental Neurobiology, Institute of Development, Aging and Cancer, Tohoku University, Miyagi, Japan
| | - Sidonia Fagarasan
- Division of Integrated High-Order Regulatory Systems, Center for Cancer Immunotherapy and Immunobiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- Laboratory for Mucosal Immunity, Center for Integrative Medical Sciences, RIKEN Yokohama Institute, Yokohama, Japan
| | - Tasuku Honjo
- Division of Immunology and Genomic Medicine, Center for Cancer Immunotherapy and Immunobiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Ogura T, Hirata A, Kagtagiri T, Takakura Y, Kameda H. AB0381 ULTRASONOGRAPHY TO PREDICT FLARE AFTER DISCONTINUATION OF BIOLOGICS IN PATIENTS WITH RHEUMATOID ARTHRITIS IN REMISSION. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.5399] [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: 11/04/2022]
Abstract
BackgroundUltrasonography (US) has been suggested to be useful in predicting flare in patients with rheumatoid arthritis (RA) after discontinuation of biological disease-modifying antirheumatic drugs (bDMARDs).ObjectivesThis study aimed to investigate whether US can predict flare after discontinuation of bDMARDs in RA patients who have achieved stringent remission criteria.MethodsWe prospectively enrolled RA patients who maintained a simplified disease activity index ≤ 3.3 and discontinued bDMARDs and measured clinical assessment and US every 2-3 months for 2 years. The US examination was performed on 40 joints using the semi-quantitative method of 0-3 on the Grey-scale (GS) and Power Doppler (PD), and the total values for each patient were used as the GS score and PD score. Joints graded as GS score ≥ 2 or PD score ≥ 1 were counted as US arthritis. In addition, tendons at 36 sites were counted with or without tendinitis/tenosynovitis to obtain a tendon score.ResultsThirty-six patients were enrolled and two patients who dropped out early without flare were excluded from the comparative analyses. At baseline, the median GS score was 7, PD score was 0, US arthritis was 0, and tendon score was 0. The total PD score was 0 in 26 patients (72%) and it was 1 in 5 patients (14%). There were no significant differences in US findings between the relapse group (20 patients) and the non-relapse group (14 patients). Positive and negative predictive value for PD-positive findings (total PD score ≥1) were 60% and 42%, and for total PD score ≥2 were 60% and 41%, respectively.ConclusionThe PD score in the US findings at the time of bDMARDs discontinuation was not predictive for future disease flare.Disclosure of InterestsTakehisa Ogura Speakers bureau: AbbVie G.K, Ayako Hirata: None declared, Takaharu Kagtagiri: None declared, Yuto Takakura: None declared, Hideto Kameda Speakers bureau: AbbVie G.K., Asahi Kasei Pharma, Astellas Pharma Inc., Bristol-Myers Squibb, Chugai Pharmaceutical Co. Ltd., Eisai Co. Ltd., Eli Lilly Japan K.K., Gilead Sciences, Janssen Pharmaceutical K.K., Mitsubishi Tanabe Pharma, Novartis Pharma K.K., and Sanofi Pharma, Grant/research support from: AbbVie G.K., Asahi Kasei Pharma, Astellas Pharma Inc., Chugai Pharmaceutical Co. Ltd., Eisai Co. Ltd., Mitsubishi Tanabe Pharma, Novartis Pharma K.K., and Sanofi Pharma
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Chuong TT, Ogura T, Hiyoshi N, Takahashi K, Lee S, Hiraga K, Iwase H, Yamaguchi A, Kamagata K, Mano E, Hamakawa S, Nishihara H, Kyotani T, Stucky GD, Itoh T. Giant Carbon Nano-Test Tubes as Versatile Imaging Vessels for High-Resolution and In Situ Observation of Proteins. ACS Appl Mater Interfaces 2022; 14:26507-26516. [PMID: 35548999 DOI: 10.1021/acsami.2c06318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Cryogenic electron microscopy is one of the fastest and most robust methods for capturing high-resolution images of proteins, but stringent sample preparation, imaging conditions, and in situ radiation damage inflicted during data acquisition directly affect the resolution and ability to capture dynamic details, thereby limiting its broader utilization and adoption for protein studies. We addressed these drawbacks by introducing synthesized giant carbon nano-test tubes (GCNTTs) as radiation-insulating materials that lessen the irradiation impact on the protein during data acquisition, physical molecular concentrators that localize the proteins within a nanoscale field of view, and vessels that create a microenvironment for solution-phase imaging. High-resolution electron microscopy images of single and aggregated hemoglobin molecules within GCNTTs in both solid and solution states were acquired. Subsequent scanning transmission electron microscopy, small-angle neutron scattering, and fluorescence studies demonstrated that the GCNTT vessel protected the hemoglobin molecules from electron irradiation-, light-, or heat-induced denaturation. To demonstrate the robustness of GCNTT as an imaging platform that could potentially augment the study of proteins, we demonstrated the robustness of the GCNTT technique to image an alternative protein, d-fructose dehydrogenase, after cyclic voltammetry experiments to review encapsulation and binding insights. Given the simplicity of the material synthesis, sample preparation, and imaging technique, GCNTT is a promising imaging companion for high-resolution, single, and dynamic protein studies under electron microscopy.
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Affiliation(s)
- Tracy T Chuong
- National Institute of Advanced Industrial Science Technology (AIST), Sendai 983-8551, Japan
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106-9510, United States
| | - Toshihiko Ogura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8566, Japan
| | - Norihito Hiyoshi
- National Institute of Advanced Industrial Science Technology (AIST), Sendai 983-8551, Japan
| | - Kazuma Takahashi
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Sangho Lee
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Keita Hiraga
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Hiroki Iwase
- Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS), Tokai, Ibaraki 319-1106, Japan
| | - Akira Yamaguchi
- Institute of Quantum Beam Science, Ibaraki University, Mito, Ibaraki 310-8512, Japan
| | - Kiyoto Kamagata
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Eriko Mano
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Satoshi Hamakawa
- National Institute of Advanced Industrial Science Technology (AIST), Sendai 983-8551, Japan
| | - Hirotomo Nishihara
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Sendai 980-8577, Japan
| | - Takashi Kyotani
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Galen D Stucky
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106-9510, United States
| | - Tetsuji Itoh
- National Institute of Advanced Industrial Science Technology (AIST), Sendai 983-8551, Japan
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11
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Umemura T, Hatano T, Ogura T, Miyata T, Agawa Y, Nakajima H, Tomoyose R, Sakamoto H, Tsujimoto Y, Nakazawa Y, Wakabayashi T, Hashimoto T, Fujiki R, Shiraishi W, Nagata I. ADC Level is Related to DWI Reversal in Patients Undergoing Mechanical Thrombectomy: A Retrospective Cohort Study. AJNR Am J Neuroradiol 2022; 43:893-898. [PMID: 35550283 DOI: 10.3174/ajnr.a7510] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 03/17/2022] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE In patients with ischemic stroke, DWI lesions can occasionally be reversed by reperfusion therapy. This study aimed to ascertain the relationship between ADC levels and DWI reversal in patients with acute ischemic stroke who underwent recanalization treatment. MATERIALS AND METHODS We conducted a retrospective cohort study in patients with acute ischemic stroke who underwent endovascular mechanical thrombectomy with successful recanalization between April 2017 and March 2021. DWI reversal was assessed through follow-up MR imaging approximately 24 hours after treatment. RESULTS In total, 118 patients were included. DWI reversal was confirmed in 42 patients. The ADC level in patients with reversal was significantly higher than that in patients without reversal. Eighty-three percent of patients with DWI reversal areas had mean ADC levels of ≥520 × 10-6 mm2/s, and 71% of patients without DWI reversal areas had mean ADC levels of <520 × 10-6 mm2/s. The mean ADC threshold was 520 × 10-6 mm2/s with a sensitivity and specificity of 71% and 83%, respectively. In multivariate analysis, the mean ADC level (OR, 1.023; 95% CI, 1.013-1.033; P < .0001) was independently associated with DWI reversal. Patients with DWI reversal areas had earlier neurologic improvement (NIHSS at 7 days) than patients without reversal areas (P < .0001). CONCLUSIONS In acute ischemic stroke, the ADC value is independently associated with DWI reversal. Lesions with a mean ADC of ≥520 × 10-6 mm2/s are salvageable by mechanical thrombectomy, and DWI reversal areas regain neurologic function. The ADC value is easily assessed and is a useful tool to predict viable lesions.
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Affiliation(s)
- T Umemura
- From the Department of Neurosurgery (T.U., T.H., T.O., T.M., Y.A., N.H., R.T., H.S., Y.T., Y.N., T.W., I.N.), Stroke Center, Kokura Memorial Hospital, Kitakyushu City, Japan
| | - T Hatano
- From the Department of Neurosurgery (T.U., T.H., T.O., T.M., Y.A., N.H., R.T., H.S., Y.T., Y.N., T.W., I.N.), Stroke Center, Kokura Memorial Hospital, Kitakyushu City, Japan
| | - T Ogura
- From the Department of Neurosurgery (T.U., T.H., T.O., T.M., Y.A., N.H., R.T., H.S., Y.T., Y.N., T.W., I.N.), Stroke Center, Kokura Memorial Hospital, Kitakyushu City, Japan
| | - T Miyata
- From the Department of Neurosurgery (T.U., T.H., T.O., T.M., Y.A., N.H., R.T., H.S., Y.T., Y.N., T.W., I.N.), Stroke Center, Kokura Memorial Hospital, Kitakyushu City, Japan
| | - Y Agawa
- From the Department of Neurosurgery (T.U., T.H., T.O., T.M., Y.A., N.H., R.T., H.S., Y.T., Y.N., T.W., I.N.), Stroke Center, Kokura Memorial Hospital, Kitakyushu City, Japan
| | - H Nakajima
- From the Department of Neurosurgery (T.U., T.H., T.O., T.M., Y.A., N.H., R.T., H.S., Y.T., Y.N., T.W., I.N.), Stroke Center, Kokura Memorial Hospital, Kitakyushu City, Japan
| | - R Tomoyose
- From the Department of Neurosurgery (T.U., T.H., T.O., T.M., Y.A., N.H., R.T., H.S., Y.T., Y.N., T.W., I.N.), Stroke Center, Kokura Memorial Hospital, Kitakyushu City, Japan
| | - H Sakamoto
- From the Department of Neurosurgery (T.U., T.H., T.O., T.M., Y.A., N.H., R.T., H.S., Y.T., Y.N., T.W., I.N.), Stroke Center, Kokura Memorial Hospital, Kitakyushu City, Japan
| | - Y Tsujimoto
- From the Department of Neurosurgery (T.U., T.H., T.O., T.M., Y.A., N.H., R.T., H.S., Y.T., Y.N., T.W., I.N.), Stroke Center, Kokura Memorial Hospital, Kitakyushu City, Japan
| | - Y Nakazawa
- From the Department of Neurosurgery (T.U., T.H., T.O., T.M., Y.A., N.H., R.T., H.S., Y.T., Y.N., T.W., I.N.), Stroke Center, Kokura Memorial Hospital, Kitakyushu City, Japan
| | - T Wakabayashi
- From the Department of Neurosurgery (T.U., T.H., T.O., T.M., Y.A., N.H., R.T., H.S., Y.T., Y.N., T.W., I.N.), Stroke Center, Kokura Memorial Hospital, Kitakyushu City, Japan
| | - T Hashimoto
- Department of Neurology (T.H., R.F., W.B.), Stroke Center, Kokura Memorial Hospital, Kitakyushu City, Japan
| | - R Fujiki
- Department of Neurology (T.H., R.F., W.B.), Stroke Center, Kokura Memorial Hospital, Kitakyushu City, Japan
| | - W Shiraishi
- Department of Neurology (T.H., R.F., W.B.), Stroke Center, Kokura Memorial Hospital, Kitakyushu City, Japan
| | - I Nagata
- From the Department of Neurosurgery (T.U., T.H., T.O., T.M., Y.A., N.H., R.T., H.S., Y.T., Y.N., T.W., I.N.), Stroke Center, Kokura Memorial Hospital, Kitakyushu City, Japan
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12
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Hayashi Y, Yimiti D, Sanada Y, Ding C, Omoto T, Ogura T, Nakasa T, Ishikawa M, Hiemori K, Tateno H, Miyaki S, Adachi N. The therapeutic capacity of bone marrow MSC-derived extracellular vesicles in Achilles tendon healing is passage dependent and indicated by specific glycans. FEBS Lett 2022; 596:1047-1058. [PMID: 35294042 DOI: 10.1002/1873-3468.14333] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 03/01/2022] [Accepted: 03/01/2022] [Indexed: 11/06/2022]
Abstract
The therapeutic potential of mesenchymal stem cell (MSC)-derived extracellular vesicles (EVs) for various diseases and tissue repair is attracting attention. Here, EVs from conditioned medium of human bone marrow MSCs at passage 5 (P5) and 12 (P12) were analyzed using mouse Achilles tendon rupture model and lectin microarray. P5 MSC-EVs accelerated Achilles tendon healing compared with P12 MSC-EVs. Fucose-specific lectin TJA-II was indicated as a glycan marker for therapeutic MSC-EVs. The present study demonstrated that early passaged MSC-EVs promote Achilles tendon healing compared with senescent MSC-EVs. Glycans on MSC-EVs might provide useful tools to establish a quality control and isolation system for therapeutic MSC-EVs in regenerative medicine.
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Affiliation(s)
- Yuta Hayashi
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.,Department of Musculoskeletal Traumatology and Reconstructive surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Dilimulati Yimiti
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Yohei Sanada
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.,Medical Center for Translational and Clinical Research, Hiroshima University Hospital, Hiroshima, Japan
| | - Chenyang Ding
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Takenori Omoto
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Toshihiko Ogura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
| | - Tomoyuki Nakasa
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.,Medical Center for Translational and Clinical Research, Hiroshima University Hospital, Hiroshima, Japan
| | - Masakazu Ishikawa
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.,Department of Artificial Joints and Biomaterials, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Keiko Hiemori
- Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
| | - Hiroaki Tateno
- Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
| | - Shigeru Miyaki
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.,Medical Center for Translational and Clinical Research, Hiroshima University Hospital, Hiroshima, Japan
| | - Nobuo Adachi
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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13
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Nakauchi Y, Nishinami S, Murakami Y, Ogura T, Kano H, Shiraki K. Opalescence Arising from Network Assembly in Antibody Solution. Mol Pharm 2022; 19:1160-1167. [PMID: 35274955 DOI: 10.1021/acs.molpharmaceut.1c00929] [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: 11/28/2022]
Abstract
Opalescence of therapeutic antibody solutions is one of the concerns in drug formulation. However, the mechanistic insights into the opalescence of antibody solutions remain unclear. Here, we investigated the assembly states of antibody molecules as a function of antibody concentration. The solutions of bovine gamma globulin and human immunoglobulin G at around 100 mg/mL showed the formation of submicron-scale network assemblies. The network assembly resulted in the appearance of opalescence with a transparent blue color without the precipitates of antibodies. Furthermore, the addition of trehalose and arginine, previously known to act as protein stabilizers and protein aggregation suppressors, was able to suppress the opalescence arising from the network assembly. These results will provide an important information for evaluating and improving protein formulations.
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Affiliation(s)
- Yoshitaka Nakauchi
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8573, Ibaraki, Japan
| | - Suguru Nishinami
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8573, Ibaraki, Japan
| | - Yusuke Murakami
- Ph.D. Program in Humanics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8577, Ibaraki, Japan.,International Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan
| | - Toshihiko Ogura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Higashi, Tsukuba 305-8566, Ibaraki, Japan
| | - Hideaki Kano
- Department of Chemistry, Kyusyu University, 744, Motooka, Nishi-ku, Fukuoka-shi 819-0395, Fukuoka, Japan
| | - Kentaro Shiraki
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8573, Ibaraki, Japan
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14
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Miyashita SI, Ogura T, Kondo T, Fujii SI, Inagaki K, Takahashi Y, Minoda A. Recovery of Au from dilute aqua regia solutions via adsorption on the lyophilized cells of a unicellular red alga Galdieria sulphuraria: A mechanism study. J Hazard Mater 2022; 425:127982. [PMID: 34894509 DOI: 10.1016/j.jhazmat.2021.127982] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 11/28/2021] [Accepted: 12/01/2021] [Indexed: 06/14/2023]
Abstract
The high electrical conductivity, chemical stability, and low toxicity of elemental Au make it a highly valuable resource. However, wastewater produced during the mining, utilization, and disposal of Au inevitably contains small amounts (10-40 mg L-1) of Au, thus posing environmental risks. It is too acidic to be treated with inexpensive and eco-friendly bioadsorbents previously studied for the remediation of less acidic effluents. Herein, lyophilized Galdieria sulphuraria cells are shown to directly adsorb Au from simulated Au-containing wastewater with a total acid concentration of 4 M, achieving an adsorption capacity of 35 ± 2.5 mg g-1 Au after 30-min exposure and a selectivity that exceeds that of an ion-exchange resin and is comparable to that of activated carbon. Additionally, Au adsorbed on these cells is more easily eluted than that adsorbed on the ion-exchange resin or activated carbon. Detailed characterizations reveal that Au accumulates on the surface of lyophilized cells, where it is mainly present as AuCl4- and not as Au0, in contrast to a previously proposed adsorption mechanism. Thus, our work provides valuable insights into the mechanism of Au adsorption on biomaterials and paves the way to the cheap and eco-friendly recovery of Au from acidic wastewater.
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Affiliation(s)
- Shin-Ichi Miyashita
- National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 3, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563, Japan.
| | - Toshihiko Ogura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 6, Higashi, Tsukuba, Ibaraki 305-8566, Japan.
| | - Takahiro Kondo
- Department of Materials Science and Tsukuba Research Center for Energy Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
| | - Shin-Ichiro Fujii
- National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 3, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563, Japan.
| | - Kazumi Inagaki
- National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 3, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563, Japan.
| | - Yoshio Takahashi
- Department of Earth and Planetary Science, the University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
| | - Ayumi Minoda
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
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15
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Ogura T. Development of multi-frequency impedance scanning electron microscopy. PLoS One 2022; 17:e0263098. [PMID: 35077509 PMCID: PMC8789111 DOI: 10.1371/journal.pone.0263098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 01/11/2022] [Indexed: 11/23/2022] Open
Abstract
Nanometre-scale observation of specimens in water is indispensable in many scientific fields like biology, chemistry, material science and nanotechnology. Scanning electron microscopy (SEM) allows high-resolution images of biological samples to be obtained under high vacuum conditions but requires specific sample-preparation protocols. Therefore, there is a need for convenient and minimally invasive methods of observing samples in solution. We have developed a new type of impedance microscopy, namely multi-frequency impedance SEM (IP-SEM), which allows nanoscale imaging of various specimens in water while minimising radiation damage. By varying the frequency of the input voltage signal of the sine wave, the present system can detect dielectric properties of the sample’s composition at nanometre resolution. It also enables examination of unstained biological specimens and material samples in water. Furthermore, it can be used for diverse samples in liquids across a broad range of scientific subjects such as nanoparticles, nanotubes and organic and catalytic materials.
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Affiliation(s)
- Toshihiko Ogura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
- * E-mail:
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16
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Oki S, Nishinami S, Nakauchi Y, Ogura T, Shiraki K. Arginine and its Derivatives Suppress the Opalescence of an Antibody Solution. J Pharm Sci 2021; 111:1126-1132. [PMID: 34843741 DOI: 10.1016/j.xphs.2021.11.018] [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: 09/14/2021] [Revised: 11/23/2021] [Accepted: 11/23/2021] [Indexed: 11/28/2022]
Abstract
Opalescence is a problem concerned with the stability of an antibody solution. It occurs when a high concentration of a protein is present. Arginine (Arg) is a versatile aggregation suppressor of proteins, which is among the candidates that suppress opalescence in antibody solutions. Here, we investigated the effect of various types of small molecular additives on opalescence to reveal the mechanism of Arg in preventing opalescence in antibody solution. As expected, Arg suppressed the opalescence of the immunoglobulin G (IgG) solution. Arg also concentration dependently inhibited the formation of microstructures in IgG molecules. Interestingly, the intrinsic fluorescence spectra of highly concentrated IgG solutions differed from those having low concentrations, even though IgG retained a distinct tertiary structure. Arginine ethylester was more effective in suppressing the opalescence of IgG solutions than Arg, whereas lysine and γ-guanidinobutyric acid were less effective. These results indicated that positively charged groups of both α-amine and guanidinium actively influence Arg as an additive for suppressing opalescence. Diols, which are the suppressors of the liquid-liquid phase separation of proteins were also effective in suppressing the opalescence. These results therefore provide insight into the control of opalescence of antibody solutions at high concentrations using solution additives.
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Affiliation(s)
- Shogo Oki
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Suguru Nishinami
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Yoshitaka Nakauchi
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Toshihiko Ogura
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Higashi, Tsukuba, Ibaraki 305-8566, Japan
| | - Kentaro Shiraki
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan.
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17
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Fujimori R, Liu K, Soeno S, Naraba H, Shirakawa T, Hara K, Sonoo T, Ogura T, Nakamura K, Goto T. 135 Acceptance and Barriers of AI-Based Decision Support Systems in Emergency Departments: A Quantitative and Qualitative Evaluation. Ann Emerg Med 2021. [DOI: 10.1016/j.annemergmed.2021.09.145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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18
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Sato Y, Ikeda S, Kato T, Kenmotsu H, Ogura T, Hino A, Harada T, Kubota K, Tokito T, Okamoto I, Furuya N, Yokoyama T, Hosokawa S, Iwasawa T, Kasajima R, Miyagi Y, Misumi T, Yamanaka T, Okamoto H. 1285P Final analysis of TORG1936/AMBITIOUS: Phase II study of atezolizumab for pretreated non-small cell lung cancer with idiopathic interstitial pneumonia. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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19
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Yamamoto H, Oikawa R, Takeda H, Umemoto K, Doi A, Horie Y, Ogura T, Mizukami T, Izawa N, Moore J, Sokol E, Sunakawa Y. 1423P Genomic landscape in advanced gastric cancer from real-world data (RWD) of clinical genomic testing. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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20
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Ogura T, Hirata A, Inoue Y, Kagtagiri T, Takakura Y, Kameda H. POS1396 DAMAGE PROGRESSION OF FINGER JOINT CARTILAGE EVALUATED BY ULTRASOUND AND X-RAY IN PATIENTS WITH RHEUMATOID ARTHRITIS (RA). Ann Rheum Dis 2021. [DOI: 10.1136/annrheumdis-2021-eular.2784] [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: 11/04/2022]
Abstract
Background:Cartilage damage in RA has been evaluated by joint space narrowing (JSN) in X-ray, while it is not a direct evaluation of cartilage. Previously we have confirmed the usefulness of the direct imaging of finger joint cartilage by ultrasound (US) in patients with RA [1].Objectives:We aimed to examine the temporal changes of US cartilage thickness in RA patients.Methods:We enrolled 53 RA patients in whom the cartilage thickness of finger joints was measured by US and had radiographs of both hands at baseline and 1-year later. The cartilage of metacapophalangeal and proximal interphalangeal joints of 2nd to 5th fingers were bilaterally visualized at the middle portion from a longitudinal dorsal view. Cartilage thickness was measured from the base of the cartilage to the interface artefact at the cartilage surface by static images. In addition, the JSN of the corresponding joints was scored using a hand X-ray by van der Heijde-modified Sharp method. Continuous variables from the two groups were analyzed using the Mann-Whitney U test or Wilcoxon signed-rank test. The relationships among the continuous variables were assessed using the Spearman’s rank correlation coefficient.Results:The median age of the patients was 68 years and the median disease duration was 6.3 years. The sum of total cartilage thickness from 16 joints per patient ranged from 3.1 to 9.1mm (median 6.5 mm) at baseline, and it was significantly correlated with total JSN score of the same joints (ρ=-0.63, p<0.001). The cartilage thickness was inversely correlated with disease duration (rho=-0.40, p=0.003), but not associated with age nor height. The decrease in cartilage thickness over 1 year was evident in patients with persistent moderate to high disease activity by the DAS28-CRP (n=10; median -6.2%) as compared with other patients (n=43; median -1.2%, p=0.004 versus active patients).Conclusion:This pilot study demonstrated the progression of cartilage damage by sustained RA activity, supporting the validity and usefulness of joint cartilage thickness evaluation by ultrasound in patients with RA.References:[1]Ogura T, et al. Arthritis Care Res 2019 Oct 25.Table 1.SALIENT FEATURES OF THE 9 PATIENTS PRESENTING WITH RETINAL TOXICITY DUE TO HCQSl.NoAgeGenderWeight(Kg)Primary DiagnosisDoseDuration(Years)Detection Method UsedRecommended Dose(mg/Day)Received Dose(mg/Day)Cumulative Dose(grams)FUNDUSEXAM.SD-OCTHVF10-2FAF147F58SLE2904004383RPE ChangesThinning/Photoreceptor LossDefects seen-220F46SLE2302001462Multiple Small Drusens In Paramacular AreaMultipleDrusensNormalPerifoveal autofluorescence spots-drusens323F50SLE2504001461RPE ChangesRPEDisruptionsDefects seen-430F55SLE275200731NormalNormalParacentral Scotoma-550F49RA2452005117Early Bull’s Eye MaculopathyRPEAtrophyDefects seen-672F60RA30020073010RPE AtrophyFR AbsentRPEAtrophyGeneral reduction in sensitivity-765M57.4RA2872001462RPE ChangesRPEDisruptions & Thinning NotedDefects seen-862F70RA3502002193Chorioretinal AtrophyAlteredRPEMembraneDefects seen-959M71.6RA3582002924RPE ChangesRPEDisruptionsNormal-F:Female; M:Male; SLE:Systemic Lupus Erythematosus; RA: Rheumatoid Arthritis, FUNDUS EXAM.: Fundus Examination; SD-OCT:Spectral Domain-Optical Coherence Tomography, HVF 10-2:Humphrey Visual Field 10-2; FAF: Fundus Autofluorescence, RPE:Retinal Pigment Epithelium; FR:Foveal ReflexDisclosure of Interests:None declared
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Iwase H, Kubota M, Itoh T, Ogura T, Ebina T, Ohtani H, Kurosaka K, Fukushima Y. Direct Observation of the Relationship between Thixotropic Behavior and Shear-Induced Orientation of Clay Particles in Synesthetic Hectorite Suspensions. Langmuir 2021; 37:6435-6441. [PMID: 34010001 DOI: 10.1021/acs.langmuir.1c00404] [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] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A thixotropic characteristics of aqueous gels containing smectite clay minerals were used in various industrial applications such as paint additives, which have been affected by the clay types and clay particle sizes. A model called a house-of-card arrangement of clay particles and anisotropic arrangement in aqueous gels has been proposed. We prepared different sizes of synthetic hectorite and studied them by scanning electron-assisted dielectric microscopy (SE-ADM) and simultaneous small-angle neutron scattering and rheological measurements (Rheo-SANS). The Rheo-SANS results indicated that the clay particles with the cross-sectional radius of 30 nm were clearly oriented in the direction of shear-flow (1 × 103 s-1) direction, but the anisotropic change was not observed for an aqueous gel with clays whose average radius was 19.5 nm. The present study suggested the thixotropic characteristics of aqueous gels depend on the hectorite particle size and aggregation structure under shear conditions.
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Affiliation(s)
- Hiroki Iwase
- Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS), 162-1 Shirakata, Tokai, Ibaraki 319-1106, Japan
| | - Munehiro Kubota
- Iwaki Laboratory, Kunimine Industries Co., Ltd., 23-5 Kuidesaku, Shimofunao, Iwaki, Fukushima 972-8312, Japan
| | - Tetsuji Itoh
- Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology (AIST), 4-2-1 Nigatake, Miyagino, Sendai, Miyagi 983-8551, Japan
| | - Toshihiko Ogura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba , Ibaraki 305-8566, Japan
| | - Takeo Ebina
- Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology (AIST), 4-2-1 Nigatake, Miyagino, Sendai, Miyagi 983-8551, Japan
| | - Hiroyuki Ohtani
- Iwaki Laboratory, Kunimine Industries Co., Ltd., 23-5 Kuidesaku, Shimofunao, Iwaki, Fukushima 972-8312, Japan
| | - Keiichi Kurosaka
- Iwaki Laboratory, Kunimine Industries Co., Ltd., 23-5 Kuidesaku, Shimofunao, Iwaki, Fukushima 972-8312, Japan
| | - Yoshiaki Fukushima
- Advanced Institute of Materials Science, Yamabuki, 358-5, Tokyo, Shinjuku 162-0801, Japan
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22
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Furukawa S, Chatani M, Higashitani A, Higashibata A, Kawano F, Nikawa T, Numaga-Tomita T, Ogura T, Sato F, Sehara-Fujisawa A, Shinohara M, Shimazu T, Takahashi S, Watanabe-Takano H. Findings from recent studies by the Japan Aerospace Exploration Agency examining musculoskeletal atrophy in space and on Earth. NPJ Microgravity 2021; 7:18. [PMID: 34039989 PMCID: PMC8155041 DOI: 10.1038/s41526-021-00145-9] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 04/25/2021] [Indexed: 11/09/2022] Open
Abstract
The musculoskeletal system provides the body with correct posture, support, stability, and mobility. It is composed of the bones, muscles, cartilage, tendons, ligaments, joints, and other connective tissues. Without effective countermeasures, prolonged spaceflight under microgravity results in marked muscle and bone atrophy. The molecular and physiological mechanisms of this atrophy under unloaded conditions are gradually being revealed through spaceflight experiments conducted by the Japan Aerospace Exploration Agency using a variety of model organisms, including both aquatic and terrestrial animals, and terrestrial experiments conducted under the Living in Space project of the Japan Ministry of Education, Culture, Sports, Science, and Technology. Increasing our knowledge in this field will lead not only to an understanding of how to prevent muscle and bone atrophy in humans undergoing long-term space voyages but also to an understanding of countermeasures against age-related locomotive syndrome in the elderly.
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Affiliation(s)
- Satoshi Furukawa
- Human Spaceflight Technology Directorate, Japan Aerospace Exploration Agency, Tsukuba, Ibaraki, Japan.
| | - Masahiro Chatani
- Department of Pharmacology, Showa University School of Dentistry, Tokyo, Japan. .,Pharmacological Research Center, Showa University, Tokyo, Japan.
| | | | - Akira Higashibata
- Human Spaceflight Technology Directorate, Japan Aerospace Exploration Agency, Tsukuba, Ibaraki, Japan
| | - Fuminori Kawano
- Graduate School of Health Sciences, Matsumoto University, Matsumoto, Nagano, Japan
| | - Takeshi Nikawa
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
| | - Takuro Numaga-Tomita
- Department of Molecular Pharmacology, School of Medicine, Shinshu University, Matsumoto, Nagano, Japan
| | - Toshihiko Ogura
- Department of Developmental Neurobiology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Fuminori Sato
- Department of Growth Regulation, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Atsuko Sehara-Fujisawa
- Department of Growth Regulation, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Masahiro Shinohara
- Department of Rehabilitation for the Movement Functions, Research Institute, National Rehabilitation Center for Persons with Disabilities, Tokorozawa, Saitama, Japan
| | | | - Satoru Takahashi
- Department of Anatomy and Embryology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Haruko Watanabe-Takano
- Department of Cell Biology, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
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23
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Okada T, Ogura T. Scanning Electron-Assisted Dielectric Microscopy Reveals Autophagosome Formation by LC3 and ATG12 in Cultured Mammalian Cells. Int J Mol Sci 2021; 22:ijms22041834. [PMID: 33673233 PMCID: PMC7917705 DOI: 10.3390/ijms22041834] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 02/08/2021] [Accepted: 02/09/2021] [Indexed: 01/01/2023] Open
Abstract
Autophagy is an intracellular self-devouring system that plays a central role in cellular recycling. The formation of functional autophagosomes depends on several autophagy-related proteins, including the microtubule-associated proteins 1A/1B light chain 3 (LC3) and the conserved autophagy-related gene 12 (Atg12). We have recently developed a novel scanning electron-assisted dielectric microscope (SE-ADM) for nanoscale observations of intact cells. Here, we used the SE-ADM system to observe LC3- and Atg12-containing autophagosomes in cells labelled in the culture medium with antibodies conjugated to colloidal gold particles. We observed that, during autophagosome formation, Atg12 localized along the actin meshwork structure, whereas LC3 formed arcuate or circular alignments. Our system also showed a difference in the distribution of LC3 and Atg12; Atg12 was broadly distributed while LC3 was more localized. The difference in the spatial distribution demonstrated by our system explains the difference in the size of fluorescent spots due to the fluorescently labelled antibodies observed using optical microscopy. The direct SE-ADM observation of cells should thus be effective in analyses of autophagosome formation.
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24
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Kim SY, Mori T, Chek MF, Furuya S, Matsumoto K, Yajima T, Ogura T, Hakoshima T. Structural insights into vesicle amine transport-1 (VAT-1) as a member of the NADPH-dependent quinone oxidoreductase family. Sci Rep 2021; 11:2120. [PMID: 33483563 PMCID: PMC7822847 DOI: 10.1038/s41598-021-81409-y] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 01/05/2021] [Indexed: 11/09/2022] Open
Abstract
Vesicle amine transport protein-1 (VAT-1) has been implicated in the regulation of vesicular transport, mitochondrial fusion, phospholipid transport and cell migration, and is a potential target of anticancer drugs. Little is known about the molecular function of VAT-1. The amino acid sequence indicates that VAT-1 belongs to the quinone oxidoreductase subfamily, suggesting that VAT-1 may possess enzymatic activity in unknown redox processes. To clarify the molecular function of VAT-1, we determined the three-dimensional structure of human VAT-1 in the free state at 2.3 Å resolution and found that VAT-1 forms a dimer with the conserved NADPH-binding cleft on each protomer. We also determined the structure of VAT-1 in the NADP-bound state at 2.6 Å resolution and found that NADP binds the binding cleft to create a putative active site with the nicotine ring. Substrate screening suggested that VAT-1 possesses oxidoreductase activity against quinones such as 1,2-naphthoquinone and 9,10-phenanthrenequinone.
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Affiliation(s)
- Sun-Yong Kim
- Structural Biology Laboratory, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192, Japan
| | - Tomoyuki Mori
- Structural Biology Laboratory, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192, Japan
| | - Min Fey Chek
- Structural Biology Laboratory, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192, Japan
| | - Shunji Furuya
- Structural Biology Laboratory, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192, Japan
| | - Ken Matsumoto
- Department of Developmental Neurobiology, Institute of Development, Aging and Cancer, Tohoku University, 4-1 Seiryo, Aoba, Sendai, Miyagi, 980-8575, Japan
| | - Taisei Yajima
- Department of Developmental Neurobiology, Institute of Development, Aging and Cancer, Tohoku University, 4-1 Seiryo, Aoba, Sendai, Miyagi, 980-8575, Japan
| | - Toshihiko Ogura
- Department of Developmental Neurobiology, Institute of Development, Aging and Cancer, Tohoku University, 4-1 Seiryo, Aoba, Sendai, Miyagi, 980-8575, Japan
| | - Toshio Hakoshima
- Structural Biology Laboratory, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192, Japan.
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25
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Okada T, Iwayama T, Murakami S, Torimura M, Ogura T. Nanoscale observation of PM2.5 incorporated into mammalian cells using scanning electron-assisted dielectric microscope. Sci Rep 2021; 11:228. [PMID: 33420286 PMCID: PMC7794539 DOI: 10.1038/s41598-020-80546-0] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 12/21/2020] [Indexed: 11/25/2022] Open
Abstract
PM2.5 has been correlated with risk factors for various diseases and infections. It promotes tissue injury by direct effects of particle components. However, effects of PM2.5 on cells have not been fully investigated. Recently, we developed a novel imaging technology, scanning electron-assisted dielectric-impedance microscopy (SE-ADM), which enables observation of various biological specimens in aqueous solution. In this study, we successfully observed PM2.5 incorporated into living mammalian cells in culture media. Our system directly revealed the process of PM2.5 aggregation in the cells at a nanometre resolution. Further, we found that the PM2.5 aggregates in the intact cells were surrounded by intracellular membrane-like structures of low-density in the SE-ADM images. Moreover, the PM2.5 aggregates were shown by confocal Raman microscopy to be located inside the cells rather than on the cell surface. We expect our method to be applicable to the observation of various nanoparticles inside cells in culture media.
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Affiliation(s)
- Tomoko Okada
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, Higashi 1-1-1, Tsukuba, Ibaraki, 305-8566, Japan
| | - Tomoaki Iwayama
- Department of Periodontology, Osaka University Graduate School of Dentistry, 1-8 Yamada-oka, Suita, Osaka, 565-0851, Japan
| | - Shinya Murakami
- Department of Periodontology, Osaka University Graduate School of Dentistry, 1-8 Yamada-oka, Suita, Osaka, 565-0851, Japan
| | - Masaki Torimura
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan
| | - Toshihiko Ogura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, Higashi 1-1-1, Tsukuba, Ibaraki, 305-8566, Japan.
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26
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Watanabe Y, Seya D, Ihara D, Ishii S, Uemoto T, Kubo A, Arai Y, Isomoto Y, Nakano A, Abe T, Shigeta M, Kawamura T, Saito Y, Ogura T, Nakagawa O. Importance of endothelial Hey1 expression for thoracic great vessel development and its distal enhancer for Notch-dependent endothelial transcription. J Biol Chem 2020; 295:17632-17645. [PMID: 33454003 PMCID: PMC7762959 DOI: 10.1074/jbc.ra120.015003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 10/12/2020] [Indexed: 12/19/2022] Open
Abstract
Thoracic great vessels such as the aorta and subclavian arteries are formed through dynamic remodeling of embryonic pharyngeal arch arteries (PAAs). Previous work has shown that loss of a basic helix-loop-helix transcription factor Hey1 in mice causes abnormal fourth PAA development and lethal great vessel anomalies resembling congenital malformations in humans. However, how Hey1 mediates vascular formation remains unclear. In this study, we revealed that Hey1 in vascular endothelial cells, but not in smooth muscle cells, played essential roles for PAA development and great vessel morphogenesis in mouse embryos. Tek-Cre-mediated Hey1 deletion in endothelial cells affected endothelial tube formation and smooth muscle differentiation in embryonic fourth PAAs and resulted in interruption of the aortic arch and other great vessel malformations. Cell specificity and signal responsiveness of Hey1 expression were controlled through multiple cis-regulatory regions. We found two distal genomic regions that had enhancer activity in endothelial cells and in the pharyngeal epithelium and somites, respectively. The novel endothelial enhancer was conserved across species and was specific to large-caliber arteries. Its transcriptional activity was regulated by Notch signaling in vitro and in vivo, but not by ALK1 signaling and other transcription factors implicated in endothelial cell specificity. The distal endothelial enhancer was not essential for basal Hey1 expression in mouse embryos but may likely serve for Notch-dependent transcriptional control in endothelial cells together with the proximal regulatory region. These findings help in understanding the significance and regulation of endothelial Hey1 as a mediator of multiple signaling pathways in embryonic vascular formation.
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Affiliation(s)
- Yusuke Watanabe
- Department of Molecular Physiology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan; Graduate School of Medical Sciences, Nara Medical University, Kashihara, Nara, Japan.
| | - Daiki Seya
- Department of Molecular Physiology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan
| | - Dai Ihara
- Department of Molecular Physiology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan; Laboratory of Stem Cell and Regenerative Medicine, Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Shuhei Ishii
- Department of Molecular Physiology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan; Graduate School of Medical Sciences, Nara Medical University, Kashihara, Nara, Japan
| | - Taiki Uemoto
- Department of Molecular Physiology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan; Graduate School of Medical Sciences, Nara Medical University, Kashihara, Nara, Japan
| | - Atsushi Kubo
- Department of Developmental Neurobiology, Institute of Development, Aging, and Cancer, Tohoku University, Sendai, Miyagi, Japan
| | - Yuji Arai
- Department of Molecular Physiology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan; Laboratory of Animal Experiment and Medical Management, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan
| | - Yoshie Isomoto
- Laboratory of Animal Experiment and Medical Management, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan
| | - Atsushi Nakano
- Laboratory of Animal Experiment and Medical Management, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan
| | - Takaya Abe
- Laboratory for Animal Resources and Genetic Engineering, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan
| | - Mayo Shigeta
- Laboratory for Animal Resources and Genetic Engineering, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan
| | - Teruhisa Kawamura
- Laboratory of Stem Cell and Regenerative Medicine, Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Yoshihiko Saito
- Graduate School of Medical Sciences, Nara Medical University, Kashihara, Nara, Japan; Department of Cardiovascular Medicine, Nara Medical University, Kashihara, Nara, Japan
| | - Toshihiko Ogura
- Department of Developmental Neurobiology, Institute of Development, Aging, and Cancer, Tohoku University, Sendai, Miyagi, Japan
| | - Osamu Nakagawa
- Department of Molecular Physiology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan; Graduate School of Medical Sciences, Nara Medical University, Kashihara, Nara, Japan.
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27
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Ogura T, Nishioka N, Ueno S, Yamada M, Higuchi K. Gastrointestinal: Guidewire insertion under transluminal cholangioscopy guidance for a hepaticojejunostomy stricture resembling a pinhole. J Gastroenterol Hepatol 2020; 35:2029. [PMID: 32246861 DOI: 10.1111/jgh.15050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 03/25/2020] [Indexed: 12/09/2022]
Affiliation(s)
- T Ogura
- 2nd Department of Internal Medicine, Osaka Medical College, Osaka, Japan
| | - N Nishioka
- 2nd Department of Internal Medicine, Osaka Medical College, Osaka, Japan
| | - S Ueno
- 2nd Department of Internal Medicine, Osaka Medical College, Osaka, Japan
| | - M Yamada
- 2nd Department of Internal Medicine, Osaka Medical College, Osaka, Japan
| | - K Higuchi
- 2nd Department of Internal Medicine, Osaka Medical College, Osaka, Japan
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Honda T, Yamasaki Y, Nakao H, Murakami Y, Ogura T, Kousaka Y, Akimitsu J. Topological metastability supported by thermal fluctuation upon formation of chiral soliton lattice in [Formula: see text]. Sci Rep 2020; 10:18596. [PMID: 33122696 PMCID: PMC7596096 DOI: 10.1038/s41598-020-74945-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 10/07/2020] [Indexed: 11/29/2022] Open
Abstract
Topological magnetic structure possesses topological stability characteristics that make it robust against disturbances which are a big advantage for data processing or storage devices of spintronics; nonetheless, such characteristics have been rarely clarified. This paper focused on the formation of chiral soliton lattice (CSL), a one-dimensional topological magnetic structure, and provides a discussion of its topological stability and influence of thermal fluctuation. Herein, CSL responses against change of temperature and applied magnetic field were investigated via small-angle resonant soft X-ray scattering in chromium niobium sulfide ([Formula: see text]). CSL transformation relative to the applied magnetic field demonstrated a clear agreement with the theoretical prediction of the sine-Gordon model. Further, there were apparent differences in the process of chiral soliton creation and annihilation, discussed from the viewpoint of competing between thermal fluctuation and the topological metastability.
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Affiliation(s)
- T. Honda
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, 305-0801 Japan
| | - Y. Yamasaki
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, 305-0801 Japan
- Research and Services Division of Materials Data and Integrated System (MaDIS), National Institute for Materials Science (NIMS), Tsukuba, 305-0047 Japan
- Center for Emergent Matter Science (CEMS), RIKEN, Wako, 351-0198 Japan
- PRESTO, Japan Science and Technology Agency (JST), Saitama, Japan
| | - H. Nakao
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, 305-0801 Japan
| | - Y. Murakami
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, 305-0801 Japan
| | - T. Ogura
- Department of Physics and Mathematics, Aoyama-Gakuin University, Sagamihara, Kanagawa 252-5258 Japan
| | - Y. Kousaka
- Department of Physics and Electronics, Osaka Prefecture University, Osaka, 599-8531 Japan
| | - J. Akimitsu
- Research Institute for Interdisciplinary Science, Okayama University, Okayama, 700-8530 Japan
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29
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Ogura T, Hirata A, Takenaka S, Inoue Y, Kagtagiri T, Takakura Y, Ito H, Kameda H. AB1123 PROGRESSION OF FINGER JOINT CARTILAGE DAMAGE EVALUATED BY ULTRASOUND IN PATIENTS WITH RHEUMATOID ARTHRITIS. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.5598] [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
Background:Cartilage damage in rheumatoid arthritis (RA) has been evaluated by joint space narrowing (JSN) in X-ray, despite the fact that it is not a direct evaluation of cartilage. We have recently reported that direct evaluation of finger joint cartilage thickness evaluated by ultrasound (US) is valid and useful for patients with RA1).Objectives:In this study, we aimed to examine the progression of cartilage damage in RA patients.Methods:Forty-six patients with RA who had completed the US evaluation of finger joint cartilage thickness at baseline and after 1 year were included in this study. The cartilage thickness of metacarpophalangeal (MCP) and proximal interphalangeal (PIP) joints of 2nd to 5th fingers were bilaterally visualized and measured at the middle portion of MCP and PIP joints from a longitudinal dorsal view, with approximately 90 degrees flexion. Cartilage thickness was measured from the base of the cartilage to the interface artefact at the cartilage surface by calculating the pixel counts on DICOM images.Results:In patients, 78% were female, the median age was 68 years and the median disease duration of the patients was 6 years. The median DAS28-CRP at baseline was 2.6. The sum of total cartilage thickness from 16 joints per patient ranged from 3.1 to 9.1 mm (median 6.4 mm) at baseline, and it was significantly correlated with disease duration (ρ=-0.423, p=0.003). A significant decrease from the baseline in the cartilage thickness (median -1.6%) was observed after 1 year (p=0.041). Furthermore, patients with persistently moderate/high disease activity for 1 year by DAS28-CRP (n=9) showed a greater decrease in the cartilage thickness than the remaining patients with controlled disease activity (n=37) (median -5.9% versus -1.5%, respectively, p=0.029).Conclusion:This study further supported the validity and usefulness of joint cartilage thickness evaluation by US in patients with RA.References:[1]Ogura T, et al. Arthritis Care Res 2019 Oct 25.Disclosure of Interests:Takehisa Ogura: None declared, Ayako Hirata: None declared, Sayaka Takenaka: None declared, Yuki Inoue: None declared, Takaharu Kagtagiri: None declared, Yuto Takakura: None declared, Hideki Ito: None declared, Hideto Kameda Grant/research support from: Abbvie, Asahi-Kasei, Chugai, Eisai, Mitsubishi-Tanabe and Novartis, Consultant of: Abbvie, Boehringer, Celgene, Eli Lilly, Janssen, Novartis, Sanofi, UCB, Speakers bureau: Abbvie, Asahi-Kasei, BMS, Chugai, Eisai, Eli Lilly, Janssen, Mitsubishi-Tanabe, Novartis and Pfizer
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Ogura T, Yamada M, Nishioka N, Yamada T, Higuchi K. Gastrointestinal: Knuckle guidewire insertion: Safe techniques of guidewire insertion into the pancreatobiliary tract using a novel 0.025-inch guidewire. J Gastroenterol Hepatol 2020; 35:707. [PMID: 31828835 DOI: 10.1111/jgh.14895] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 10/03/2019] [Accepted: 10/07/2019] [Indexed: 12/09/2022]
Affiliation(s)
- T Ogura
- 2nd Department of Internal Medicine, Osaka Medical College, Osaka, Japan
| | - M Yamada
- 2nd Department of Internal Medicine, Osaka Medical College, Osaka, Japan
| | - N Nishioka
- 2nd Department of Internal Medicine, Osaka Medical College, Osaka, Japan
| | - T Yamada
- 2nd Department of Internal Medicine, Osaka Medical College, Osaka, Japan
| | - K Higuchi
- 2nd Department of Internal Medicine, Osaka Medical College, Osaka, Japan
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Ihara D, Watanabe Y, Seya D, Arai Y, Isomoto Y, Nakano A, Kubo A, Ogura T, Kawamura T, Nakagawa O. Expression of Hey2 transcription factor in the early embryonic ventricles is controlled through a distal enhancer by Tbx20 and Gata transcription factors. Dev Biol 2020; 461:124-131. [DOI: 10.1016/j.ydbio.2020.02.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 02/01/2020] [Accepted: 02/01/2020] [Indexed: 02/07/2023]
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32
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Ogura T, Ueno S, Yamada T, Yamada M, Higuchi K. Gastrointestinal: Antegrade metal stent deployment for pancreaticojejunostomy stricture under endoscopic ultrasound guidance. J Gastroenterol Hepatol 2020; 35:360. [PMID: 31730727 DOI: 10.1111/jgh.14884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 10/03/2019] [Indexed: 12/09/2022]
Affiliation(s)
- T Ogura
- 2nd Department of Internal Medicine, Osaka Medical College, Osaka, Japan
| | - S Ueno
- 2nd Department of Internal Medicine, Osaka Medical College, Osaka, Japan
| | - T Yamada
- 2nd Department of Internal Medicine, Osaka Medical College, Osaka, Japan
| | - M Yamada
- 2nd Department of Internal Medicine, Osaka Medical College, Osaka, Japan
| | - K Higuchi
- 2nd Department of Internal Medicine, Osaka Medical College, Osaka, Japan
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Fukuda E, Mori M, Shiku H, Miyahara Y, Kawamura Y, Ogawa K, Ogura T, Goshima N. Development of INSOL-tag for proteome-wide protein handling and its application in protein array analysis. Genes Cells 2019; 25:41-53. [PMID: 31733161 DOI: 10.1111/gtc.12735] [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: 10/16/2019] [Revised: 11/13/2019] [Accepted: 11/13/2019] [Indexed: 11/30/2022]
Abstract
Proteomic analysis requires protein tags that enable high-throughput handling; however, versatile tags that can be used in in vitro expression systems are currently lacking. In this study, we developed an insoluble protein tag, INSOL-tag, derived from human transcription factor MafG. The INSOL-tagged target protein is expressed in a eukaryotic in vitro expression system and recovered as a pellet following centrifugation at 19,000 × g for 20 min. Comparisons of the target protein recovery rates of GST-tag and INSOL-tag using 111 cytoplasmic proteins revealed a fourfold increase in the yield of INSOL-tagged proteins. Using 267 cancer antigens purified with INSOL-tag, we subsequently developed an INSOL-CTA array method, for profiling autoantibodies in sera of cancer patients. The detection limit of the array was approximately 11.1 pg IgG, and the correlation with ELISA was high (R2 = .993, .955). Moreover, when autoantibody profiling of digestive cancer patient sera was performed, antigen spreading was observed. These data suggest that INSOL-tag is a versatile tag that can insolubilize a wide range of target proteins. It is therefore expected to become a powerful tool in comprehensive protein preparation for protein arrays, antibody production, and mass spectrometry.
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Affiliation(s)
- Eriko Fukuda
- Molecular Profiling Research Center for Drug Discovery, National Institute of Advanced Industrial Science and Technology, Koto-ku, Tokyo, Japan.,Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Masatoshi Mori
- Molecular Profiling Research Center for Drug Discovery, National Institute of Advanced Industrial Science and Technology, Koto-ku, Tokyo, Japan
| | - Hiroshi Shiku
- Department of Immuno-Gene Therapy, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Yoshihiro Miyahara
- Department of Immuno-Gene Therapy, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | | | - Koji Ogawa
- Molecular Profiling Research Center for Drug Discovery, National Institute of Advanced Industrial Science and Technology, Koto-ku, Tokyo, Japan
| | - Toshihiko Ogura
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
| | - Naoki Goshima
- Molecular Profiling Research Center for Drug Discovery, National Institute of Advanced Industrial Science and Technology, Koto-ku, Tokyo, Japan
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34
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Ikeda S, Kato T, Kenmotsu H, Ogura T, Iwasawa S, Iwasawa T, Kasajima R, Miyagi Y, Misumi T, Yamanaka T, Okamoto H. Phase II study of atezolizumab for pretreated advanced / recurrent non-small cell lung cancer with idiopathic interstitial pneumonia (TORG1936 / AMBITIOUS study). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz437.060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Iwayama T, Okada T, Ueda T, Tomita K, Matsumoto S, Takedachi M, Wakisaka S, Noda T, Ogura T, Okano T, Fratzl P, Ogura T, Murakami S. Osteoblastic lysosome plays a central role in mineralization. Sci Adv 2019; 5:eaax0672. [PMID: 31281900 PMCID: PMC6609213 DOI: 10.1126/sciadv.aax0672] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 05/28/2019] [Indexed: 05/03/2023]
Abstract
Mineralization is the most fundamental process in vertebrates. It is predominantly mediated by osteoblasts, which secrete mineral precursors, most likely through matrix vesicles (MVs). These vesicular structures are calcium and phosphate rich and contain organic material such as acidic proteins. However, it remains largely unknown how intracellular MVs are transported and secreted. Here, we use scanning electron-assisted dielectric microscopy and super-resolution microscopy for assessing live osteoblasts in mineralizing conditions at a nanolevel resolution. We found that the calcium-containing vesicles were multivesicular bodies containing MVs. They were transported via lysosome and secreted by exocytosis. Thus, we present proof that the lysosome transports amorphous calcium phosphate within mineralizing osteoblasts.
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Affiliation(s)
- Tomoaki Iwayama
- Department of Periodontology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan
| | - Tomoko Okada
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566, Japan
| | - Tsugumi Ueda
- Department of Periodontology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan
| | - Kiwako Tomita
- Department of Periodontology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan
| | - Shuji Matsumoto
- Department of Periodontology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan
| | - Masahide Takedachi
- Department of Periodontology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan
| | - Satoshi Wakisaka
- Department of Oral Anatomy and Development, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan
| | - Takeshi Noda
- Center for Frontier Oral Science, Graduate School of Dentistry, and Graduate School of Frontier BioSciences, Osaka University, Osaka 565-0871, Japan
| | | | | | - Peter Fratzl
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Potsdam-Golm 14476, Germany
| | - Toshihiko Ogura
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566, Japan
- Corresponding author. (To. Ogura); (S. Mu.)
| | - Shinya Murakami
- Department of Periodontology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan
- Corresponding author. (To. Ogura); (S. Mu.)
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Shimizu M, Minzan K, Kawashima H, Miyasaka K, Umedachi T, Ogura T, Nakai J, Ohkura M, Hosoda K. Self-organizing cell tactile perception which depends on mechanical stimulus history. Adv Robot 2019. [DOI: 10.1080/01691864.2019.1590232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Masahiro Shimizu
- Department of Systems Innovation, Osaka University Graduate School of Engineering Science, Toyonaka, Japan
| | - Kosuke Minzan
- Department of Multimedia Engineering, Osaka University Graduate School of Information Science Technology, Suita, Japan
| | - Hiroki Kawashima
- Department of Systems Innovation, Osaka University Graduate School of Engineering Science, Toyonaka, Japan
| | - Kota Miyasaka
- Gene Expression Laboratory - Evans (GEL-E), Salk Institute for Biological studies, La Jolla, CA, USA
| | - Takuya Umedachi
- Graduate School of Information Science and Technology, The University of Tokyo, Tokyo, Japan
| | - Toshihiko Ogura
- Department of Developmental Neurobiology, Institute of Development, Aging, and Cancer and Graduate School of Life Sciences, Tohoku University, Sendai, Japan
| | - Junichi Nakai
- Graduate School of Science and Engineering, Brain and Body System Science Institute, Saitama University, Saitama, Japan
| | - Masamichi Ohkura
- Graduate School of Science and Engineering, Brain and Body System Science Institute, Saitama University, Saitama, Japan
| | - Koh Hosoda
- Department of Systems Innovation, Osaka University Graduate School of Engineering Science, Toyonaka, Japan
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Abstract
Aggregates of therapeutic proteins that can contaminate drug products during manufacture is a growing concern for the pharmaceutical industry because the aggregates are potentially immunogenic. Electron microscopy is a typical, indispensable method for imaging nanometer- to micrometer-sized structures. Nevertheless, it is not ideal because it must be performed with ex situ monitoring under high-vacuum conditions, where the samples could be altered by staining and drying. Here, we introduce a scanning electron-assisted dielectric microscopy (SE-ADM) technique for in-solution imaging of monoclonal immunoglobulin G (IgG) aggregates without staining and drying. Remarkably, SE-ADM allowed assessment of the size and morphology of the IgG aggregates in solution by completely excluding drying-induced artifacts. SE-ADM was also beneficial to study IgG aggregation caused by temporary acid exposure followed by neutralization, pH-shift stress. A box-counting analysis of the SE-ADM images provided fractal dimensions of the larger aggregates, which complemented the fractal dimensions of the smaller aggregates measured by light scattering. The scale-free or self-similarity nature of the fractal aggregates indicated that a common mechanism for antibody aggregation existed between the smaller and larger aggregates. Consequently, SE-ADM is a useful method for characterizing protein aggregates to bridge the gaps that occur among conventional analytical methods, such as those related to in situ/ ex situ techniques or size/morphology assessments.
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Affiliation(s)
- Yukako Senga
- Biomedical Research Institute , National Institute of Advanced Industrial Science and Technology (AIST) , Higashi, Tsukuba , Ibaraki 305-8566 , Japan
| | - Hiroshi Imamura
- Biomedical Research Institute , National Institute of Advanced Industrial Science and Technology (AIST) , Higashi, Tsukuba , Ibaraki 305-8566 , Japan
| | - Toshihiko Ogura
- Biomedical Research Institute , National Institute of Advanced Industrial Science and Technology (AIST) , Higashi, Tsukuba , Ibaraki 305-8566 , Japan
| | - Shinya Honda
- Biomedical Research Institute , National Institute of Advanced Industrial Science and Technology (AIST) , Higashi, Tsukuba , Ibaraki 305-8566 , Japan
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38
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Takahashi H, Morizane C, Nomura S, Okano N, Tsuda M, Mizuno N, Satake H, Tsuji K, Shioji K, Ishii H, Yasui K, Miyakawa H, Ishiguro A, Ogura T, Ueno M, Ikeda A, Terashima T, Ikeda M, Okusaka T, Furuse J. Phase II clinical trial of gemcitabine plus oxaliplatin combination therapy (GEMOX) in patients with advanced pancreatic adenocarcinoma with a family history of pancreatic/breast/ovarian/prostate cancer or personal history of breast/ovarian/prostate cancer (FABRIC study). Ann Oncol 2018. [DOI: 10.1093/annonc/mdy282.114] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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39
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Mizukami T, Sunakawa Y, Arai H, Chosokabe M, Doi A, Horie Y, Hirakawa M, Saji O, Naruki S, Izawa N, Ogura T, Tsuda T, Enomoto T, Mikami S, Fujino T, Otsubo T, Nakajima T. Dynamic change of immune-related gene expression status during chemoradiotherapy in locally advanced esophageal cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy303.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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40
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Usui Y, Kenmotsu H, Mori K, Ono A, Yoh K, Baba T, Fujiwara Y, Yamaguchi O, Ko R, Okamoto H, Yamamoto N, Ninomiya T, Ogura T, Kato T. A multicenter single-arm phase II study of nab-paclitaxel/carboplatin for non-small cell lung cancer patients with interstitial lung disease. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy292.060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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41
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Okada T, Ogura T. Nanoscale imaging of the adhesion core including integrin β1 on intact living cells using scanning electron-assisted dielectric-impedance microscopy. PLoS One 2018; 13:e0204133. [PMID: 30235285 PMCID: PMC6147470 DOI: 10.1371/journal.pone.0204133] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Accepted: 09/03/2018] [Indexed: 12/13/2022] Open
Abstract
The integrins are a superfamily of transmembrane proteins composed of α and β subunit dimers involved in cell-cell and cell-extracellular matrix interactions. The largest integrin subgroup is integrin β1, which contributes to several malignant phenotypes. Recently, we have developed a novel imaging technology named scanning electron-assisted dielectric-impedance microscopy (SE-ADM), which visualizes untreated living mammalian cells in aqueous conditions with high contrast. Using the SE-ADM system, we observed 60-nm gold colloids with antibodies directly binding to the focal adhesion core containing integrin β1 on mammalian cancer cells without staining and fixation. The adhesion core contains three or four high-density regions of integrin β1 and connects to the actin filament. An adhesion core with high-density integrin β1 is suggested to contain 10-20 integrin dimers. Our SE-ADM system can also visualize various other membrane proteins in living cells in medium without staining and fixation.
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Affiliation(s)
- Tomoko Okada
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Higashi, Tsukuba, Ibaraki, Japan
| | - Toshihiko Ogura
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Higashi, Tsukuba, Ibaraki, Japan
- * E-mail:
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42
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Okamoto R, Taniguchi M, Onishi Y, Kumagai N, Uraki J, Fujimoto N, Hotta Y, Sasaki K, Furuta N, Fujii E, Yano Y, Yamada N, Ogura T, Takei Y, Ito M. 5971Predictors of the results of the confirmatory tests for the diagnosis of primary hyperaldosteronism in hypertensive patients with an aldosterone-to-renin ratio greater than 20. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.5971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- R Okamoto
- Mie University Graduate School of Medicine, Department of Cardiology and Nephrology, Tsu, Japan
| | - M Taniguchi
- Mie University Graduate School of Medicine, Department of Cardiology and Nephrology, Tsu, Japan
| | - Y Onishi
- Mie University Graduate School of Medicine, Department of Diabetes, Metabolism and Endocrinology, Tsu, Japan
| | - N Kumagai
- Mie University Graduate School of Medicine, Department of Diabetes, Metabolism and Endocrinology, Tsu, Japan
| | - J Uraki
- Mie University Graduate School of Medicine, Department of Radiology, Tsu, Japan
| | - N Fujimoto
- Mie University Graduate School of Medicine, Department of Cardiology and Nephrology, Tsu, Japan
| | - Y Hotta
- Mie University Graduate School of Medicine, Department of Diabetes, Metabolism and Endocrinology, Tsu, Japan
| | - K Sasaki
- Mie University Graduate School of Medicine, Department of Diabetes, Metabolism and Endocrinology, Tsu, Japan
| | - N Furuta
- Mie University Graduate School of Medicine, Department of Diabetes, Metabolism and Endocrinology, Tsu, Japan
| | - E Fujii
- Mie University Graduate School of Medicine, Department of Cardiology and Nephrology, Tsu, Japan
| | - Y Yano
- Mie University Graduate School of Medicine, Department of Diabetes, Metabolism and Endocrinology, Tsu, Japan
| | - N Yamada
- Mie University Graduate School of Medicine, Department of Cardiology and Nephrology, Tsu, Japan
| | - T Ogura
- Mie University Hospital, Clinical Research Support Center, Tsu, Japan
| | - Y Takei
- Mie University Graduate School of Medicine, Department of Diabetes, Metabolism and Endocrinology, Tsu, Japan
| | - M Ito
- Mie University Graduate School of Medicine, Department of Cardiology and Nephrology, Tsu, Japan
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43
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Ikeda S, Yoshioka H, Ikeo S, Morita M, Sone N, Niwa T, Nishiyama A, Yokoyama T, Sekine A, Ogura T, Ishida T. P2.01-001 Serum Albumin Level Predicts the Survival Benefit of Chemotherapy in Elderly Advanced NSCLC Patients with Poor Performance Status. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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44
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Ogura T, Okada T. Nanoscale observation of the natural structure of milk-fat globules and casein micelles in the liquid condition using a scanning electron assisted dielectric microscopy. Biochem Biophys Res Commun 2017; 491:1021-1025. [PMID: 28780347 DOI: 10.1016/j.bbrc.2017.08.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 08/01/2017] [Indexed: 12/18/2022]
Abstract
Recently, aqueous nanoparticles have been used in drug-delivery systems for new type medicines. In particular, milk-casein micelles have been used as drug nanocarriers for targeting cancer cells. Therefore, nanostructure observation of particles and micelles in their native liquid condition is indispensable for analysing their function and mechanisms. However, traditional optical and scanning electron microscopy have difficulty observing the nanostructures of aqueous micelles. Recently, we developed a novel imaging technique called scanning electron-assisted dielectric microscopy (SE-ADM) that enables observation of various biological specimens in water with very little radiation damage and high-contrast imaging without staining or fixation at an 8-nm spatial resolution. In this study, for the first time, we show that the SE-ADM system is capable of high-resolution observation of whole-milk specimens in their natural state. Moreover, we successfully observe the casein micelles and milk-fat globules in an intact liquid condition. Our SE-ADM system can be applied to various biological particles and micelles in a native liquid state.
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Affiliation(s)
- Toshihiko Ogura
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 2, Umezono, Tsukuba, Ibaraki 305-8568, Japan.
| | - Tomoko Okada
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 2, Umezono, Tsukuba, Ibaraki 305-8568, Japan
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45
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Ito R, Katano I, Kawai K, Yagoto M, Takahashi T, Ka Y, Ogura T, Takahashi R, Ito M. A Novel Xenogeneic Graft-Versus-Host Disease Model for Investigating the Pathological Role of Human CD4 + or CD8 + T Cells Using Immunodeficient NOG Mice. Am J Transplant 2017; 17:1216-1228. [PMID: 27862942 DOI: 10.1111/ajt.14116] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Revised: 10/24/2016] [Accepted: 11/08/2016] [Indexed: 02/06/2023]
Abstract
Graft-versus-host disease (GVHD) is a major complication of allogenic bone marrow transplantation and involves the infiltration of donor CD4+ and/or CD8+ T cells into various organs of the recipient. The pathological role of human CD4+ and CD8+ T cells in GVHD remains controversial. In this study, we established two novel xenogeneic (xeno)-GVHD models. Human CD4+ or CD8+ T cells were purified from peripheral blood and were transplanted into immunodeficient NOD/Shi-scid IL2rgnull (NOG) mice. Human CD8+ T cells did not induce major GVHD symptoms in conventional NOG mice. However, CD8+ T cells immediately proliferated and induced severe GVHD when transferred into NOG mice together with at least 0.5 × 106 CD4+ T cells or into NOG human interleukin (IL)-2 transgenic mice. Human CD4+ T cell-transplanted NOG mice developed skin inflammations including alopecia, epidermal hyperplasia, and neutrophilia. Pathogenic T helper (Th)17 cells accumulated in the skin of CD4+ T cell-transplanted NOG mice. Further, an anti-human IL-17 antibody (secukinumab) significantly suppressed these skin pathologies. These results indicate that pathogenic human Th17 cells induce cutaneous GVHD via IL-17-dependent pathways. This study provides fundamental insights into the pathogenesis of xeno-GVHD, and these humanized mouse models may be useful as preclinical tools for the prevention of GVHD.
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Affiliation(s)
- R Ito
- Central Institute for Experimental Animals, Kawasaki, Kanagawa, Japan
| | - I Katano
- Central Institute for Experimental Animals, Kawasaki, Kanagawa, Japan
| | - K Kawai
- Central Institute for Experimental Animals, Kawasaki, Kanagawa, Japan
| | - M Yagoto
- Central Institute for Experimental Animals, Kawasaki, Kanagawa, Japan
| | - T Takahashi
- Central Institute for Experimental Animals, Kawasaki, Kanagawa, Japan
| | - Y Ka
- Central Institute for Experimental Animals, Kawasaki, Kanagawa, Japan
| | - T Ogura
- Central Institute for Experimental Animals, Kawasaki, Kanagawa, Japan
| | - R Takahashi
- Central Institute for Experimental Animals, Kawasaki, Kanagawa, Japan
| | - M Ito
- Central Institute for Experimental Animals, Kawasaki, Kanagawa, Japan
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46
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Kato Y, Yoshimoto S, Kuroda Y, Imura M, Yamashita S, Ogura T, Oshiro O. Noninvasive simultaneous measurement of blood pressure and blood flow velocity for hemodynamic analysis. Annu Int Conf IEEE Eng Med Biol Soc 2017; 2016:2570-2573. [PMID: 28268847 DOI: 10.1109/embc.2016.7591255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
We describe a noninvasive and simultaneous measurement method of beat-by-beat blood pressure and blood flow velocity waveforms in the radial artery using tonometry and Doppler flowmetry. We conducted a subjective experiment in which hold-down pressure of tonometry was controlled for determining optimal hold-down pressure and the measurement accuracy under the optimal hold-down pressure was evaluated. As a result, blood pressure and blood flow velocity could be measured simultaneously without the influence of the hold-down pressure on the blood flow velocity. It was possible to analyze hemodynamic indicators, such as wave intensity and vascular impedance, with blood pressure and blood flow using the system. The proposed system for detecting unexpected fluctuations in blood pressure and the involved mechanisms may contribute to the treatment of cardiovascular diseases.
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47
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Ogura T, Hirata A, Hayashi N, Takenaka S, Ito H, Mizushina K, Fujisawa Y, Imamura M, Yamashita N, Nakahashi S, Kujime R, Kameda H. Comparison of ultrasonographic joint and tendon findings in hands between early, treatment-naïve patients with systemic lupus erythematosus and rheumatoid arthritis. Lupus 2016; 26:707-714. [PMID: 27837198 DOI: 10.1177/0961203316676375] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [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: 12/21/2022]
Abstract
Although both systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA) may lead to joint deformity, SLE arthritis is typically non-erosive and often accompanied by Jaccoud's deformity. Therefore, we examined characteristics of joint and tendon lesions in patients with SLE and RA by ultrasonography. Fifteen treatment-naïve SLE patients and 40 treatment-naïve RA patients with joint symptoms were included in this study. The hand joints and related tendons were ultrasonographically examined using grey-scale (GS) and power Doppler (PD). Joint involvement was comparably observed in patients with SLE and RA (80% versus 95%, p = 0.119). However, tendon involvement was more frequent in SLE than in RA (93% versus 65%, p = 0.045), especially in the wrist joints (73% versus 40%, p = 0.037). When we investigated the intensity of US findings, the joint synovitis score (GS + PD) per affected joint was lower in SLE than RA (2.0 versus 2.6, p = 0.019), while tendon inflammation score was not significantly different (2.1 versus 2.2, p = 0.738). Finally, the examination of concordance between joint and tendon involvement in the same finger revealed that joint lesion appeared in only 49% of fingers having tendon involvement in the SLE group, which was significantly less than 74% in the RA group ( p = 0.010). Thus, as compared with RA, SLE arthropathy is characterized by the predominance of tenosynovitis/periextensor tendon inflammation, which is likely to develop independently from joint synovitis.
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Affiliation(s)
- T Ogura
- Division of Rheumatology, Department of Internal Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
| | - A Hirata
- Division of Rheumatology, Department of Internal Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
| | - N Hayashi
- Division of Rheumatology, Department of Internal Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
| | - S Takenaka
- Division of Rheumatology, Department of Internal Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
| | - H Ito
- Division of Rheumatology, Department of Internal Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
| | - K Mizushina
- Division of Rheumatology, Department of Internal Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
| | - Y Fujisawa
- Division of Rheumatology, Department of Internal Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
| | - M Imamura
- Division of Rheumatology, Department of Internal Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
| | - N Yamashita
- Division of Rheumatology, Department of Internal Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
| | - S Nakahashi
- Division of Rheumatology, Department of Internal Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
| | - R Kujime
- Division of Rheumatology, Department of Internal Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
| | - H Kameda
- Division of Rheumatology, Department of Internal Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
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48
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Kousaka Y, Ogura T, Zhang J, Miao P, Lee S, Torii S, Kamiyama T, Campo J, Inoue K, Akimitsu J. Long Periodic Helimagnetic Ordering in CrM3S6(M = Nb and Ta). ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1742-6596/746/1/012061] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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49
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Misumi Y, Okamoto H, Naoki K, Hosomi Y, Ogura T, Masuda N, Minato K, Yokoyama T, Kishi K, Nishikawa M, Kato T, Seki N, Goto I, Watanabe K. Phase I/II study of induction chemotherapy using carboplatin plus irinotecan and sequential thoracic radiotherapy (TRT) for elderly patients with limited-stage small-cell lung cancer (LD-SCLC): The final results of TORG 0604. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw389.06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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50
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Furuta T, Miyaki S, Ishitobi H, Ogura T, Kato Y, Kamei N, Miyado K, Higashi Y, Ochi M. Mesenchymal Stem Cell-Derived Exosomes Promote Fracture Healing in a Mouse Model. Stem Cells Transl Med 2016; 5:1620-1630. [PMID: 27460850 DOI: 10.5966/sctm.2015-0285] [Citation(s) in RCA: 298] [Impact Index Per Article: 37.3] [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: 11/02/2015] [Accepted: 06/28/2016] [Indexed: 12/13/2022] Open
Abstract
: Paracrine signaling by bone-marrow-derived mesenchymal stem cells (MSCs) plays a major role in tissue repair. Although the production of regulatory cytokines by MSC transplantation is a critical modulator of tissue regeneration, we focused on exosomes, which are extracellular vesicles that contain proteins and nucleic acids, as a novel additional modulator of cell-to-cell communication and tissue regeneration. To address this, we used radiologic imaging, histological examination, and immunohistochemical analysis to evaluate the role of exosomes isolated from MSC-conditioned medium (CM) in the healing process in a femur fracture model of CD9-/- mice, a strain that is known to produce reduced levels of exosomes. We found that the bone union rate in CD9-/- mice was significantly lower than wild-type mice because of the retardation of callus formation. The retardation of fracture healing in CD9-/- mice was rescued by the injection of exosomes, but this was not the case after the injection of exosomes-free conditioned medium (CM-Exo). The levels of the bone repair-related cytokines, monocyte chemotactic protein-1 (MCP-1), MCP-3, and stromal cell-derived factor-1 in exosomes were low compared with levels in CM and CM-Exo, suggesting that bone repair may be in part mediated by other exosome components, such as microRNAs. These results suggest that exosomes in CM facilitate the acceleration of fracture healing, and we conclude that exosomes are a novel factor of MSC paracrine signaling with an important role in the tissue repair process. SIGNIFICANCE This work focuses on exosomes, which are extracellular vesicles, as a novel additional modulator of cell-to-cell communication. This study evaluated the role of exosomes isolated from mesenchymal stem cell (MSC)-conditioned medium (MSC-CM) in the fracture-healing process of CD9-/- mice, a strain that is known to produce reduced levels of exosomes. Retardation of fracture healing in CD9-/- mice was rescued by the injection of MSC exosomes, but this was not the case after the injection of exosome-free CM. This study finds that MSC exosomes are a novel factor of MSC paracrine signaling, with an important role in the tissue repair process.
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Affiliation(s)
- Taisuke Furuta
- Department of Orthopaedics Surgery, Integrated Health Sciences, Institute of Biomedical and Health Science, Hiroshima University, Hiroshima, Japan
| | - Shigeru Miyaki
- Department of Orthopaedics Surgery, Integrated Health Sciences, Institute of Biomedical and Health Science, Hiroshima University, Hiroshima, Japan
- Department of Regenerative Medicine, Medical Center for Translational and Clinical Research, Hiroshima University Hospital, Hiroshima, Japan
| | - Hiroyuki Ishitobi
- Department of Regenerative Medicine, Medical Center for Translational and Clinical Research, Hiroshima University Hospital, Hiroshima, Japan
| | - Toshihiko Ogura
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
| | - Yoshio Kato
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
| | - Naosuke Kamei
- Department of Orthopaedics Surgery, Integrated Health Sciences, Institute of Biomedical and Health Science, Hiroshima University, Hiroshima, Japan
- Department of Regenerative Medicine, Medical Center for Translational and Clinical Research, Hiroshima University Hospital, Hiroshima, Japan
| | - Kenji Miyado
- Department of Reproductive Biology, National Center for Child Health and Development, Tokyo, Japan
| | - Yukihito Higashi
- Department of Regenerative Medicine, Medical Center for Translational and Clinical Research, Hiroshima University Hospital, Hiroshima, Japan
| | - Mitsuo Ochi
- Department of Orthopaedics Surgery, Integrated Health Sciences, Institute of Biomedical and Health Science, Hiroshima University, Hiroshima, Japan
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