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Nguyen TP, Otani T, Tsutsumi M, Kinoshita N, Fujiwara S, Nemoto T, Fujimori T, Furuse M. Tight junction membrane proteins regulate the mechanical resistance of the apical junctional complex. J Cell Biol 2024; 223:e202307104. [PMID: 38517380 PMCID: PMC10959758 DOI: 10.1083/jcb.202307104] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 01/29/2024] [Accepted: 02/16/2024] [Indexed: 03/23/2024] Open
Abstract
Epithelia must be able to resist mechanical force to preserve tissue integrity. While intercellular junctions are known to be important for the mechanical resistance of epithelia, the roles of tight junctions (TJs) remain to be established. We previously demonstrated that epithelial cells devoid of the TJ membrane proteins claudins and JAM-A completely lack TJs and exhibit focal breakages of their apical junctions. Here, we demonstrate that apical junctions fracture when claudin/JAM-A-deficient cells undergo spontaneous cell stretching. The junction fracture was accompanied by actin disorganization, and actin polymerization was required for apical junction integrity in the claudin/JAM-A-deficient cells. Further deletion of CAR resulted in the disruption of ZO-1 molecule ordering at cell junctions, accompanied by severe defects in apical junction integrity. These results demonstrate that TJ membrane proteins regulate the mechanical resistance of the apical junctional complex in epithelial cells.
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Affiliation(s)
- Thanh Phuong Nguyen
- Division of Cell Structure, National Institute for Physiological Sciences, Okazaki, Japan
- Physiological Sciences Program, Graduate Institute for Advanced Studies, SOKENDAI, Okazaki, Japan
| | - Tetsuhisa Otani
- Division of Cell Structure, National Institute for Physiological Sciences, Okazaki, Japan
- Physiological Sciences Program, Graduate Institute for Advanced Studies, SOKENDAI, Okazaki, Japan
- Japan Science and Technology Agency, Precursory Research for Embryonic Science and Technology, Kawaguchi, Japan
| | - Motosuke Tsutsumi
- Division of Biophotonics, National Institute for Physiological Sciences, Okazaki, Japan
- Biophotonics Research Group, Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences, Okazaki, Japan
| | - Noriyuki Kinoshita
- Division of Embryology, National Institute for Basic Biology, Okazaki, Japan
- Basic Biology Program, Graduate Institute for Advanced Studies, SOKENDAI, Okazaki, Japan
| | - Sachiko Fujiwara
- Division of Cell Structure, National Institute for Physiological Sciences, Okazaki, Japan
- Physiological Sciences Program, Graduate Institute for Advanced Studies, SOKENDAI, Okazaki, Japan
| | - Tomomi Nemoto
- Physiological Sciences Program, Graduate Institute for Advanced Studies, SOKENDAI, Okazaki, Japan
- Division of Biophotonics, National Institute for Physiological Sciences, Okazaki, Japan
- Biophotonics Research Group, Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences, Okazaki, Japan
| | - Toshihiko Fujimori
- Division of Embryology, National Institute for Basic Biology, Okazaki, Japan
- Basic Biology Program, Graduate Institute for Advanced Studies, SOKENDAI, Okazaki, Japan
| | - Mikio Furuse
- Division of Cell Structure, National Institute for Physiological Sciences, Okazaki, Japan
- Physiological Sciences Program, Graduate Institute for Advanced Studies, SOKENDAI, Okazaki, Japan
- Nagoya University Graduate School of Medicine, Nagoya, Japan
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2
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Ito Y, Nayuki K, Sasaki Y, Wakihara T, Okubo T, Iyoki K. Effect of defect-healing treatment on layered silicate precursors toward well-defined crosslinked frameworks. RSC Adv 2024; 14:12634-12638. [PMID: 38645524 PMCID: PMC11026999 DOI: 10.1039/d4ra01626b] [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: 03/02/2024] [Accepted: 04/12/2024] [Indexed: 04/23/2024] Open
Abstract
The synthesis of zeolites from two-dimensional layered precursors through interlayer crosslinking of the layers is a promising avenue for realizing meticulously designed synthesis routes. However, the presence of defective silanol species in the precursors hinders the achievement of desirable synthesis outcomes. This study focuses on PREFER-a layered precursor for FER-type zeolites-which was synthesized and subjected to a liquid-mediated defect-healing treatment that we recently developed. The defect-healing process involves the use of fluoride compounds for reconstruction and organic pore fillers to stabilize the framework. The effects of the treatment on the structure, composition, and iron insertion behavior of PREFER were examined. Characterization results revealed a reduction in the number of intralayer silanol defects, whereas interlayer silanols were unaffected by the defect-healing treatment. Furthermore, the subsequent alterations observed in the crosslinking behavior with iron atoms indicated that the defect-healing treatment may enhance the insertion of iron species between the layers in more homogeneous environments compared with the untreated precursor. These findings provide valuable insights into the prospects of controlled interlayer linkage in two-dimensional zeolite materials.
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Affiliation(s)
- Yoshiaki Ito
- Department of Chemical System Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
| | - Keiichiro Nayuki
- JEOL Ltd, Solution Promotion Department 3-1-2 Musashino Akishima Tokyo 196-8558 Japan
| | - Yukichi Sasaki
- Japan Fine Ceramics Center 2-4-1 Mutsuno, Atsuta-ku Nagoya 456-8587 Japan
| | - Toru Wakihara
- Department of Chemical System Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
- Institute of Engineering Innovation, The University of Tokyo 2-11-16 Yayoi, Bunkyo-ku Tokyo 113-8656 Japan
| | - Tatsuya Okubo
- Department of Chemical System Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
| | - Kenta Iyoki
- Department of Chemical System Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
- Department of Environment Systems, The University of Tokyo 5-1-5 Kashiwanoha Kashiwa-shi Chiba 277-8563 Japan
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST) Kawaguchi Saitama 332-0012 Japan
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3
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Araseki H, Sugishima N, Chisuga T, Nakano S. Development of an Enzyme Cascade System for the Synthesis of Enantiomerically Pure D-Amino Acids Utilizing Ancestral L-Amino Acid Oxidase. Chembiochem 2024; 25:e202400036. [PMID: 38385659 DOI: 10.1002/cbic.202400036] [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: 01/16/2024] [Revised: 02/19/2024] [Accepted: 02/22/2024] [Indexed: 02/23/2024]
Abstract
Enantiomerically pure D-amino acids hold significant potential as precursors for synthesizing various fine chemicals, including peptide-based drugs and other pharmaceuticals. This study focuses on establishing an enzymatic cascade system capable of converting various L-amino acids into their D-isomers. The system integrates four enzymes: ancestral L-amino acid oxidase (AncLAAO-N4), D-amino acid dehydrogenase (DAADH), D-glucose dehydrogenase (GDH), and catalase. AncLAAO-N4 initiates the process by converting L-amino acids to corresponding keto acids, which are then stereo-selectively aminated to D-amino acids by DAADH using NADPH and NH4Cl. Concurrently, any generated H2O2 is decomposed into O2 and H2O by catalase, while GDH regenerates NADPH from D-glucose. Optimization of reaction conditions and substrate concentrations enabled the successful synthesis of five D-amino acids, including a D-Phe derivative, three D-Trp derivatives, and D-phenylglycine, all with high enantiopurity (>99 % ee) at a preparative scale (>100 mg). This system demonstrates a versatile approach for producing a diverse array of D-amino acids.
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Affiliation(s)
- Hayato Araseki
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan for S.N
| | - Narumi Sugishima
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan for S.N
| | - Taichi Chisuga
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan for S.N
| | - Shogo Nakano
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan for S.N
- PRESTO, Japan Science and Technology Agency, Saitama, Japan
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4
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Hayashi Y, Hashimoto M, Takaoka K, Takemoto T, Takakura N, Kidoya H. Tumor endothelial cell-derived Sfrp1 supports the maintenance of cancer stem cells via Wnt signaling. In Vitro Cell Dev Biol Anim 2024:10.1007/s11626-024-00899-y. [PMID: 38625488 DOI: 10.1007/s11626-024-00899-y] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Accepted: 03/15/2024] [Indexed: 04/17/2024]
Abstract
Cancer stem cells (CSCs), which are critical targets for cancer therapy as they are involved in drug resistance to anticancer drugs, and metastasis, are maintained by angiocrine factors produced by particular niches that form within tumor tissue. Secreted frizzled-related protein 1 (Sfrp1) is an extracellular protein that modulates Wnt signaling. However, the cells that produce Sfrp1 in the tumor environment and its function remain unclear. We aimed to elucidate angiocrine factors related to CSC maintenance, focusing on Sfrp1. Although Sfrp1 is a Wnt pathway-related factor, its impact on tumor tissues remains unknown. We investigated the localization of Sfrp1 in tumors and found that it is expressed in some tumor vessels. Analysis of mice lacking Sfrp1 showed that tumor growth was suppressed in Sfrp1-deficient tumor tissues. Flow cytometry analysis indicated that CSCs were maintained in the early tumor growth phase in the Sfrp1 knockout (KO) mouse model of tumor-bearing cancer. However, tumor growth was inhibited in the late tumor growth phase because of the inability to maintain CSCs. Real-time PCR results from tumors of Sfrp1 KO mice showed that the expression of Wnt signaling target genes significantly decreased in the late stage of tumor growth. This suggests that Sfrp1, an angiocrine factor produced by the tumor vascular niche, is involved in Wnt signaling-mediated mechanisms in tumor tissues.
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Affiliation(s)
- Yumiko Hayashi
- Department of Integrative Vascular Biology, Faculty of Medical Science, Fukui University, 23-3 Matsuoka-Shimoaizuki, Eiheiji, Yoshida, Fukui, 910-1193, Japan
- Department of Signal Transduction, Research Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Masakazu Hashimoto
- Laboratory for Embryogenesis, Graduate School of Frontier Biosciences, Osaka University, Suita, Osaka, Japan
| | - Katsuyoshi Takaoka
- Laboratory for Embryology, Institute of Advanced Medical Sciences, Tokushima University, Tokushima, Japan
| | - Tatsuya Takemoto
- Laboratory for Embryology, Institute of Advanced Medical Sciences, Tokushima University, Tokushima, Japan
| | - Nobuyuki Takakura
- Department of Signal Transduction, Research Institute for Microbial Diseases, Osaka University, Suita, Japan
- World Premier Institute Immunology Frontier Research Center, Integrated Frontier Research for Medical Science Division, Osaka University, Suita, Japan
- Institute for Open and Transdisciplinary Research Initiatives (OTRI), Osaka University, Suita, Japan
- Center for Infectious Disease Education and Research, Osaka University, Suita, Japan
| | - Hiroyasu Kidoya
- Department of Integrative Vascular Biology, Faculty of Medical Science, Fukui University, 23-3 Matsuoka-Shimoaizuki, Eiheiji, Yoshida, Fukui, 910-1193, Japan.
- Department of Signal Transduction, Research Institute for Microbial Diseases, Osaka University, Suita, Japan.
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5
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Maeki M, Kimura N, Okada Y, Shimizu K, Shibata K, Miyazaki Y, Ishida A, Yonezawa K, Shimizu N, Shinoda W, Tokeshi M. Understanding the effects of ethanol on the liposome bilayer structure using microfluidic-based time-resolved small-angle X-ray scattering and molecular dynamics simulations. Nanoscale Adv 2024; 6:2166-2176. [PMID: 38633055 PMCID: PMC11019499 DOI: 10.1039/d3na01073b] [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] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Accepted: 02/29/2024] [Indexed: 04/19/2024]
Abstract
Lipid nanoparticles (LNPs) are essential carrier particles in drug delivery systems, particularly in ribonucleic acid delivery. In preparing lipid-based nanoparticles, microfluidic-based ethanol injection may produce precisely size-controlled nanoparticles. Ethanol is critical in LNP formation and post-treatment processes and affects liposome size, structure, lamellarity, and drug-loading efficiency. However, the effects of time-dependent changes in the ethanol concentration on the structural dynamics of liposomes are not clearly understood. Herein, we investigated ethanol-induced lipid bilayer changes in liposomes on a time scale from microseconds to tens of seconds using a microfluidic-based small-angle X-ray scattering (SAXS) measurement system coupled with molecular dynamics (MD) simulations. The time-resolved SAXS measurement system revealed that single unilamellar liposomes were converted to multilamellar liposomes within 0.8 s of contact with ethanol, and the d-spacing was decreased from 6.1 (w/o ethanol) to 4.4 nm (80% ethanol) with increasing ethanol concentration. We conducted 1 μs MD simulations to understand the molecular-level structural changes in the liposomes. The MD simulations revealed that the changes in the lamellar structure caused by ethanol at the molecular level could explain the structural changes in the liposomes observed via time-resolved SAXS. Therefore, the post-treatment process to remove residual ethanol is critical in liposome formation.
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Affiliation(s)
- Masatoshi Maeki
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University Kita 13 Nishi 8, Kita-ku Sapporo 060-8628 Japan +81-11-706-6745 +81-11-706-6773 +81-11-706-6744
- JST PRESTO 4-1-8 Honcho, Kawaguchi Saitama 332-0012 Japan
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK) Tsukuba Ibaraki 305-0801 Japan
| | - Niko Kimura
- Graduate School of Chemical Sciences and Engineering, Hokkaido University Kita 13 Nishi 8, Kita-ku Sapporo 060-8628 Japan
| | - Yuto Okada
- Graduate School of Chemical Sciences and Engineering, Hokkaido University Kita 13 Nishi 8, Kita-ku Sapporo 060-8628 Japan
| | - Kazuki Shimizu
- Graduate School of Chemical Sciences and Engineering, Hokkaido University Kita 13 Nishi 8, Kita-ku Sapporo 060-8628 Japan
| | - Kana Shibata
- Department of Materials Chemistry, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
| | - Yusuke Miyazaki
- Research Institute for Interdisciplinary Science, Okayama University Okayama 700-8530 Japan
| | - Akihiko Ishida
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University Kita 13 Nishi 8, Kita-ku Sapporo 060-8628 Japan +81-11-706-6745 +81-11-706-6773 +81-11-706-6744
| | - Kento Yonezawa
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK) Tsukuba Ibaraki 305-0801 Japan
| | - Nobutaka Shimizu
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK) Tsukuba Ibaraki 305-0801 Japan
| | - Wataru Shinoda
- Research Institute for Interdisciplinary Science, Okayama University Okayama 700-8530 Japan
| | - Manabu Tokeshi
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University Kita 13 Nishi 8, Kita-ku Sapporo 060-8628 Japan +81-11-706-6745 +81-11-706-6773 +81-11-706-6744
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6
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Peeters S, Kuwahara T, Härtwig F, Makowski S, Weihnacht V, Lasagni AF, Dienwiebel M, Moseler M, Moras G. Surface Depassivation via B-O Dative Bonds Affects the Friction Performance of B-Doped Carbon Coatings. ACS Appl Mater Interfaces 2024; 16:18112-18123. [PMID: 38547870 PMCID: PMC11011640 DOI: 10.1021/acsami.3c18803] [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: 12/15/2023] [Revised: 02/27/2024] [Accepted: 03/04/2024] [Indexed: 04/12/2024]
Abstract
Boron doping of diamond-like carbon coatings has multiple effects on their tribological properties. While boron typically reduces wear in cutting applications, some B-doped coatings show poor tribological performance compared with undoped films. This is the case of the tribological tests presented in this work in which an alumina ball is placed in frictional contact with different undoped and B-doped amorphous carbon coatings in humid air. With B-doped coatings, a higher friction coefficient at a steady state with respect to their undoped counterparts was observed. Estimates of the average contact shear stress based on experimental friction coefficients, surface topographies, and Persson's contact theory suggest that the increased friction is compatible with the formation of a sparse network of interfacial ether bonds leading to a mild cold-welding friction regime, as documented in the literature. Tight binding and density functional theory simulations were performed to investigate the chemical effect of B-doping on the interfacial properties of the carbon coatings. The results reveal that OH groups that normally passivate carbon surfaces in humid environments can be activated by boron and form B-O dative bonds across the tribological interfaces, leading to a mild cold-welding friction regime. Simulations performed on different tribological pairs suggest that this mechanism could be valid for B-doped carbon surfaces in contact with a variety of materials. In general, this study highlights the impact that subtle modifications in surface and interface chemistry caused by the presence of impurities can have on macroscopic properties, such as friction and wear.
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Affiliation(s)
- Stefan Peeters
- Fraunhofer
IWM, MiktroTribologie Centrum μTC, Wöhlerstraße 11, 79108 Freiburg, Germany
| | - Takuya Kuwahara
- Fraunhofer
IWM, MiktroTribologie Centrum μTC, Wöhlerstraße 11, 79108 Freiburg, Germany
- Osaka
Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi-ku, 558-8585 Osaka, Japan
| | - Fabian Härtwig
- Fraunhofer
IWS, Winterbergstraße 28, 01277 Dresden, Germany
- Technische
Universität Dresden, Institut für
Fertigungstechnik, George-Bähr-Straße
3c, 01069 Dresden, Germany
| | | | | | - Andrés Fabián Lasagni
- Fraunhofer
IWS, Winterbergstraße 28, 01277 Dresden, Germany
- Technische
Universität Dresden, Institut für
Fertigungstechnik, George-Bähr-Straße
3c, 01069 Dresden, Germany
| | - Martin Dienwiebel
- Fraunhofer
IWM, MiktroTribologie Centrum μTC, Wöhlerstraße 11, 79108 Freiburg, Germany
- Karlsruhe
Institute of Technology (KIT), IAM – Institute for Applied
Materials, Straße am Forum 7, 76131 Karlsruhe, Germany
| | - Michael Moseler
- Fraunhofer
IWM, MiktroTribologie Centrum μTC, Wöhlerstraße 11, 79108 Freiburg, Germany
- University
of Freiburg, Institute of Physics, Herrmann-Herder-Straße 3, 79104 Freiburg, Germany
| | - Gianpietro Moras
- Fraunhofer
IWM, MiktroTribologie Centrum μTC, Wöhlerstraße 11, 79108 Freiburg, Germany
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7
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Takeguchi M, Hashimoto A, Mitsuishi K. Depth sectioning using environmental and atomic-resolution STEM. Microscopy (Oxf) 2024; 73:145-153. [PMID: 38252480 DOI: 10.1093/jmicro/dfae005] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 01/04/2024] [Accepted: 01/15/2024] [Indexed: 01/23/2024] Open
Abstract
(Scanning) transmission electron microscopy (TEM) images of samples in gas and liquid media are acquired with an environmental cell (EC) via silicon nitride membranes. The ratio of sample signal against the background is a significant factor for resolution. Depth-sectioning scanning TEM (STEM) is a promising technique that enhances the signal for a sample embedded in a matrix. It can increase the resolution to the atomic level, thereby enabling EC-STEM applications in important areas. This review introduces depth-sectioning STEM and its applications to high-resolution EC-STEM imaging of samples in gases and in liquids.
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Affiliation(s)
- Masaki Takeguchi
- Center for Basic Research on Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
| | - Ayako Hashimoto
- Center for Basic Research on Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
| | - Kazutaka Mitsuishi
- Center for Basic Research on Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
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8
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Kawabuchi Y, Suzuki T, Wada Y, Sunada Y. Reductive Retrocyclization of a Mangana(II)cyclopentasilane to Form Manganese(0) Bis(η 2-disilene) Complexes. Angew Chem Int Ed Engl 2024; 63:e202319804. [PMID: 38329155 DOI: 10.1002/anie.202319804] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 02/07/2024] [Accepted: 02/07/2024] [Indexed: 02/09/2024]
Abstract
Ligand-exchange reactions on a mangana(II)cyclopentasilane complex that contains two THF ligands with aryl isocyanides led to the formation of manganese(0) bis(η2-disilene) complexes via a retrocyclization. In stark contrast, ligand-exchange reactions with CNtBu, an N-heterocyclic carbene, or pyridine-based ligands furnished manganese(II) complexes wherein the manganacyclopentasilane framework remained intact. The thermolysis of the obtained bis(η2-disilene) complex in the presence of mesityl isocyanide led to the formation of a cyclotetrasilane via the formal dimerization of the two η2-disilene moieties. The insertion of a mesityl isocyanide into the Mn-Siβ bond results in the formation of a manganese(II) complex supported by a [SiCSi]-type tridentate ligand scaffold.
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Affiliation(s)
- Yosuke Kawabuchi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, Japan
| | - Takuma Suzuki
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, Japan
| | - Yoshimasa Wada
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, Japan
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, Japan
| | - Yusuke Sunada
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, Japan
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, Japan
- JST PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, Japan
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9
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Kawakatsu Y, Okada R, Hara M, Tsutsui H, Yanagisawa N, Higashiyama T, Arima A, Baba Y, Kurotani KI, Notaguchi M. Microfluidic Device for Simple Diagnosis of Plant Growth Condition by Detecting miRNAs from Filtered Plant Extracts. Plant Phenomics 2024; 6:0162. [PMID: 38572468 PMCID: PMC10988387 DOI: 10.34133/plantphenomics.0162] [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] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 03/03/2024] [Indexed: 04/05/2024]
Abstract
Plants are exposed to a variety of environmental stress, and starvation of inorganic phosphorus can be a major constraint in crop production. In plants, in response to phosphate deficiency in soil, miR399, a type of microRNA (miRNA), is up-regulated. By detecting miR399, the early diagnosis of phosphorus deficiency stress in plants can be accomplished. However, general miRNA detection methods require complicated experimental manipulations. Therefore, simple and rapid miRNA detection methods are required for early plant nutritional diagnosis. For the simple detection of miR399, microfluidic technology is suitable for point-of-care applications because of its ability to detect target molecules in small amounts in a short time and with simple manipulation. In this study, we developed a microfluidic device to detect miRNAs from filtered plant extracts for the easy diagnosis of plant growth conditions. To fabricate the microfluidic device, verification of the amine-terminated glass as the basis of the device and the DNA probe immobilization method on the glass was conducted. In this device, the target miRNAs were detected by fluorescence of sandwich hybridization in a microfluidic channel. For plant stress diagnostics using a microfluidic device, we developed a protocol for miRNA detection by validating the sample preparation buffer, filtering, and signal amplification. Using this system, endogenous sly-miR399 in tomatoes, which is expressed in response to phosphorus deficiency, was detected before the appearance of stress symptoms. This early diagnosis system of plant growth conditions has a potential to improve food production and sustainability through cultivation management.
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Affiliation(s)
- Yaichi Kawakatsu
- Bioscience and Biotechnology Center,
Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Ryo Okada
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Mitsuo Hara
- Department of Molecular and Macromolecular Chemistry,
Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Hiroki Tsutsui
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Naoki Yanagisawa
- Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
- Institute of Transformative Bio-Molecules,
Nagoya University, Nagoya 464-8601, Japan
| | - Tetsuya Higashiyama
- Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
- Institute of Transformative Bio-Molecules,
Nagoya University, Nagoya 464-8601, Japan
- Department of Biological Sciences,
Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Akihide Arima
- Institute of Nano-Life-Systems, Institutes of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Yoshinobu Baba
- Institute of Nano-Life-Systems, Institutes of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
- Department of Biomolecular Engineering,
Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
- Institute of Quantum Life Science, National Institutes for Quantum Science and Technology (QST), Anagawa 4-9-1, Inage-ku, Chiba 263-8555, Japan
| | - Ken-ichi Kurotani
- Bioscience and Biotechnology Center,
Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Michitaka Notaguchi
- Bioscience and Biotechnology Center,
Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
- Department of Botany,
Graduate School of Science, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
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10
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Sasaki T, Katayama K, Imai H, Kandori H. Glu102 2.53-Mediated Early Conformational Changes in the Process of Light-Induced Green Cone Pigment Activation. Biochemistry 2024; 63:843-854. [PMID: 38458614 PMCID: PMC10993417 DOI: 10.1021/acs.biochem.3c00594] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 02/21/2024] [Accepted: 02/21/2024] [Indexed: 03/10/2024]
Abstract
Ligand-triggered activation of G protein-coupled receptors (GPCRs) relies on the phenomenon of loose allosteric coupling, which involves conformational alterations spanning from the extracellular ligand-binding domain to the cytoplasmic region, where interactions with G proteins occur. During the GPCR activation process, several intermediate and equilibrium states orchestrate the movement of the flexible and rigid transmembrane (TM) segments of the GPCR. Monitoring early conformational changes is important in unraveling the structural intricacies of the loose allosteric coupling. Here, we focus on the lumi intermediate formed by thermal relaxation from the initial photointermediate, batho in primate green cone pigment (MG), a light-sensitive GPCR responsible for color vision. Our findings from light-induced Fourier transform infrared difference spectroscopy reveal its similarity with rhodopsin, which mediates twilight vision, specifically involving the flip motion of the β-ionone ring, the relaxation of the torsional structure of the retinal, and local perturbations in the α-helix upon lumi intermediate formation. Conversely, we observe a hydrogen bond modification specific to MG's protonated carboxylic acid, identifying its origin as Glu1022.53 situated in TM2. The weakening of the hydrogen bond strength at Glu1022.53 during the transition from the batho to the lumi intermediates corresponds to a slight outward movement of TM2. Additionally, within the X-ray crystal structure of the rhodopsin lumi intermediate, we note the relocation of the Met862.53 side chain in TM2, expanding the volume of the retinal binding pocket. Consequently, the position of 2.53 emerges as the early step in the conformational shift toward light-induced activation. Moreover, given the prevalence of IR-insensitive hydrophobic amino acids at position 2.53 in many rhodopsin-like GPCRs, including rhodopsin, the hydrogen bond alteration in the C═O stretching band at Glu1022.53 of MG can be used as a probe for tracing conformational changes during the GPCR activation process.
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Affiliation(s)
- Takuma Sasaki
- Department
of Life Science and Applied Chemistry, Nagoya
Institute of Technology, Showa-ku,Nagoya 466-8555, Japan
| | - Kota Katayama
- Department
of Life Science and Applied Chemistry, Nagoya
Institute of Technology, Showa-ku,Nagoya 466-8555, Japan
- OptoBioTechnology
Research Center, Nagoya Institute of Technology, Showa-ku,Nagoya 466-8555, Japan
- PRESTO,
Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Hiroo Imai
- Center
for the Evolutionary Origins of Human Behavior, Kyoto University, Inuyama 484-8506, Japan
| | - Hideki Kandori
- Department
of Life Science and Applied Chemistry, Nagoya
Institute of Technology, Showa-ku,Nagoya 466-8555, Japan
- OptoBioTechnology
Research Center, Nagoya Institute of Technology, Showa-ku,Nagoya 466-8555, Japan
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11
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Kashida H, Azuma H, Sotome H, Miyasaka H, Asanuma H. Site-Selective Photo-Crosslinking of Stilbene Pairs in a DNA Duplex Mediated by Ruthenium Photocatalyst. Angew Chem Int Ed Engl 2024; 63:e202319516. [PMID: 38282170 DOI: 10.1002/anie.202319516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/19/2024] [Accepted: 01/26/2024] [Indexed: 01/30/2024]
Abstract
We herein report a method for site-selective photo-crosslinking of a DNA duplex. A stilbene pair was introduced into a DNA duplex and a ruthenium complex was conjugated with a triplex-forming oligonucleotide. We demonstrated that [2+2] photocycloaddition of the stilbene pair occurred upon irradiation with visible light when the ruthenium complex was in close proximity due to triplex formation. No reaction occurred when the ruthenium complex was not in proximity to the stilbene pair. The wavelength of visible light used was of lower energy than the wavelength of UV light necessary for direct excitation of stilbene. Quantum chemical calculation indicated that ruthenium complex catalyzed the photocycloaddition via triplet-triplet energy transfer. Site selectivity of this photo-crosslinking system was evaluated using a DNA duplex bearing two stilbene pairs as a substrate; we showed that the site of crosslinking was precisely regulated by the sequence of the oligonucleotide linked to the ruthenium complex. Since this method does not require orthogonal photoresponsive molecules, it will be useful in construction of complex photoresponsive DNA circuits, nanodevices and biological tools.
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Affiliation(s)
- Hiromu Kashida
- Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
| | - Hidenori Azuma
- Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
| | - Hikaru Sotome
- Division of Frontier Materials Science and, Center for Advanced Interdisciplinary Research, Graduate School of Engineering Science, Osaka University 1-3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan
| | - Hiroshi Miyasaka
- Division of Frontier Materials Science and, Center for Advanced Interdisciplinary Research, Graduate School of Engineering Science, Osaka University 1-3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan
| | - Hiroyuki Asanuma
- Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
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12
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Inoue S, Higashino T, Nikaido K, Miyata R, Matsuoka S, Tanaka M, Tsuzuki S, Horiuchi S, Kondo R, Sagayama R, Kumai R, Sekine D, Koyanagi T, Matsubara M, Hasegawa T. Control of Polar/Antipolar Layered Organic Semiconductors by the Odd-Even Effect of Alkyl Chain. Adv Sci (Weinh) 2024; 11:e2308270. [PMID: 38268432 PMCID: PMC10987142 DOI: 10.1002/advs.202308270] [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: 10/31/2023] [Revised: 12/18/2023] [Indexed: 01/26/2024]
Abstract
Some rodlike organic molecules exhibit exceptionally high layered crystallinity when composed of a link between π-conjugated backbone (head) and alkyl chain (tail). These molecules are aligned side-by-side unidirectionally to form self-organized polar monomolecular layers, providing promising 2D materials and devices. However, their interlayer stacking arrangements have never been tunable, preventing the unidirectional arrangements of molecules in whole crystals. Here, it is demonstrated that polar/antipolar interlayer stacking can be systematically controlled by the alkyl carbon number n, when the molecules are designed to involve effectively weakened head-to-head affinity. They exhibit remarkable odd-even effect in the interlayer stacking: alternating head-to-head and tail-to-tail (antipolar) arrangement in odd-n crystals, and uniform head-to-tail (polar) arrangement in even-n crystals. The films show excellent field-effect transistor characteristics presenting unique polar/antipolar dependence and considerably improved subthreshold swing in the polar films. Additionally, the polar films present enhanced second-order nonlinear optical response along normal to the film plane. These findings are key for creating polarity-controlled optoelectronic materials and devices.
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Affiliation(s)
- Satoru Inoue
- Department of Applied PhysicsThe University of TokyoHongoBunkyo‐kuTokyo113‐8656Japan
| | - Toshiki Higashino
- Research Institute for Advanced Electronics and Photonics (RIAEP)National Institute of Advanced Industrial Science and Technology (AIST)TsukubaIbaraki305‐8565Japan
| | - Kiyoshi Nikaido
- Department of Applied PhysicsThe University of TokyoHongoBunkyo‐kuTokyo113‐8656Japan
| | - Ryo Miyata
- Department of Applied PhysicsThe University of TokyoHongoBunkyo‐kuTokyo113‐8656Japan
| | - Satoshi Matsuoka
- Department of Applied PhysicsThe University of TokyoHongoBunkyo‐kuTokyo113‐8656Japan
| | - Mutsuo Tanaka
- Department of Life & Green ChemistrySaitama Institute of TechnologyFukayaSaitama369‐0293Japan
| | - Seiji Tsuzuki
- Department of Applied PhysicsThe University of TokyoHongoBunkyo‐kuTokyo113‐8656Japan
| | - Sachio Horiuchi
- Research Institute for Advanced Electronics and Photonics (RIAEP)National Institute of Advanced Industrial Science and Technology (AIST)TsukubaIbaraki305‐8565Japan
| | - Ryusuke Kondo
- Department of PhysicsOkayama UniversityOkayama700‐8530Japan
| | - Ryoko Sagayama
- Photon FactoryInstitute of Materials Structure ScienceHigh Energy Accelerator Research Organization (KEK)TsukubaIbaraki305‐0801Japan
| | - Reiji Kumai
- Photon FactoryInstitute of Materials Structure ScienceHigh Energy Accelerator Research Organization (KEK)TsukubaIbaraki305‐0801Japan
| | - Daiki Sekine
- Department of PhysicsTohoku UniversitySendai980‐8578Japan
| | | | - Masakazu Matsubara
- Department of PhysicsTohoku UniversitySendai980‐8578Japan
- Center for Science and Innovation in SpintronicsTohoku UniversitySendai980‐8577Japan
- PRESTOJapan Science and Technology Agency (JST)Kawaguchi332‐0012Japan
| | - Tatsuo Hasegawa
- Department of Applied PhysicsThe University of TokyoHongoBunkyo‐kuTokyo113‐8656Japan
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13
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Suetsugu K, Ohta T, Tayasu I. Partial mycoheterotrophy in the leafless orchid Eulophia zollingeri specialized on wood-decaying fungi. Mycorrhiza 2024; 34:33-44. [PMID: 38520554 DOI: 10.1007/s00572-024-01136-w] [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] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 02/01/2024] [Indexed: 03/25/2024]
Abstract
Although the absence of normal leaves is often considered a sign of full heterotrophy, some plants remain at least partially autotrophic despite their leafless habit. Leafless orchids with green stems and capsules probably represent a late evolutionary stage toward full mycoheterotrophy and serve as valuable models for understanding the pathways leading to this nutritional strategy. In this study, based on molecular barcoding and isotopic analysis, we explored the physiological ecology of the leafless orchid Eulophia zollingeri, which displays green coloration, particularly during its fruiting phase. Although previous studies had shown that E. zollingeri, in its adult stage, is associated with Psathyrellaceae fungi and exhibits high 13C isotope signatures similar to fully mycoheterotrophic orchids, it remained uncertain whether this symbiotic relationship is consistent throughout the orchid's entire life cycle and whether the orchid relies exclusively on mycoheterotrophy for its nutrition during the fruiting season. Our study has demonstrated that E. zollingeri maintains a specialized symbiotic relationship with Psathyrellaceae fungi throughout all life stages. However, isotopic analysis and chlorophyll data have shown that the orchid also engages in photosynthesis to meet its carbon needs, particularly during the fruiting stage. This research constitutes the first discovery of partial mycoheterotrophy in leafless orchids associated with saprotrophic non-rhizoctonia fungi.
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Affiliation(s)
- Kenji Suetsugu
- Department of Biology, Graduate School of Science, Kobe University, Kobe, Hyogo, 657-8501, Japan.
- Institute for Advanced Research, Kobe University, 1-1 Rokkodai, Nada-Ku, Kobe, Hyogo, 657-8501, Japan.
| | - Tamihisa Ohta
- Faculty of Science, Academic Assembly, University of Toyama, Gofuku 3190, Toyama, 930-8555, Japan
| | - Ichiro Tayasu
- Research Institute for Humanity and Nature, 457-4 Motoyama Kamigamo, Kita-Ku, Kyoto, 603-8047, Japan
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14
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Okamoto T, Izawa S, Hiramoto M, Kobori Y. Efficient Spin Interconversion by Molecular Conformation Dynamics of a Triplet Pair for Photon Up-Conversion in an Amorphous Solid. J Phys Chem Lett 2024; 15:2966-2975. [PMID: 38479407 PMCID: PMC10961844 DOI: 10.1021/acs.jpclett.3c03602] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 02/10/2024] [Accepted: 02/20/2024] [Indexed: 03/22/2024]
Abstract
Solid-state materials with improved light-to-energy conversions in organic photovoltaics and in optoelectronics are expected to be developed by realizing efficient triplet-triplet annihilation (TTA) by manipulating the spin conversion processes to the singlet state. In this study, we elucidate the spin conversion mechanism for delayed fluorescence by TTA from a microscopic view of the molecular conformations. We examine the time evolution of the electron spin polarization of the triplet-pair state (TT state) in an amorphous solid-state system exhibiting highly efficient up-conversion emission by using time-resolved electron paramagnetic resonance. We clarified that the spin-state population of the singlet TT increased through the spin interconversion from triplet and quintet TT states during exciton diffusion with random orientation dynamics between the two triplets for the modulation of the exchange interaction, achieving a high quantum yield of up-conversion emission. This understanding provides us with a guide for the development of efficient light-to-energy conversion devices utilizing TTA.
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Affiliation(s)
- Tsubasa Okamoto
- Molecular
Photoscience Research Center, Kobe University, 1-1, Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
- Department
of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657−8501, Japan
| | - Seiichiro Izawa
- Laboratory
for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
- Precursory
Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
- Institute
for Molecular Science, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
| | - Masahiro Hiramoto
- Institute
for Molecular Science, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
| | - Yasuhiro Kobori
- Molecular
Photoscience Research Center, Kobe University, 1-1, Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
- Department
of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657−8501, Japan
- CREST,
JST, Honcho 4-1-8, Kawaguchi, Saitama 332-0012, Japan
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15
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Yoshinari A, Isoda R, Yagi N, Sato Y, Lindeboom JJ, Ehrhardt DW, Frommer WB, Nakamura M. Near-infrared imaging of phytochrome-derived autofluorescence in plant nuclei. Plant J 2024. [PMID: 38509728 DOI: 10.1111/tpj.16699] [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: 09/13/2023] [Revised: 01/06/2024] [Accepted: 02/14/2024] [Indexed: 03/22/2024]
Abstract
Capturing images of the nuclear dynamics within live cells is an essential technique for comprehending the intricate biological processes inherent to plant cell nuclei. While various methods exist for imaging nuclei, including combining fluorescent proteins and dyes with microscopy, there is a dearth of commercially available dyes for live-cell imaging. In Arabidopsis thaliana, we discovered that nuclei emit autofluorescence in the near-infrared (NIR) range of the spectrum and devised a non-invasive technique for the visualization of live cell nuclei using this inherent NIR autofluorescence. Our studies demonstrated the capability of the NIR imaging technique to visualize the dynamic behavior of nuclei within primary roots, root hairs, and pollen tubes, which are tissues that harbor a limited number of other organelles displaying autofluorescence. We further demonstrated the applicability of NIR autofluorescence imaging in various other tissues by incorporating fluorescence lifetime imaging techniques. Nuclear autofluorescence was also detected across a wide range of plant species, enabling analyses without the need for transformation. The nuclear autofluorescence in the NIR wavelength range was not observed in animal or yeast cells. Genetic analysis revealed that this autofluorescence was caused by the phytochrome protein. Our studies demonstrated that nuclear autofluorescence imaging can be effectively employed not only in model plants but also for studying nuclei in non-model plant species.
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Affiliation(s)
- Akira Yoshinari
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya, 464-8601, Japan
- Institute of Advanced Research, Nagoya University, Nagoya, 464-0814, Japan
| | - Reika Isoda
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya, 464-8601, Japan
| | - Noriyoshi Yagi
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya, 464-8601, Japan
| | - Yoshikatsu Sato
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya, 464-8601, Japan
| | - Jelmer J Lindeboom
- Department of Plant Biology, Carnegie Institution for Science, Stanford, California, 94305, USA
| | - David W Ehrhardt
- Department of Plant Biology, Carnegie Institution for Science, Stanford, California, 94305, USA
- Department of Biology, Stanford University, Stanford, California, 94305, USA
| | - Wolf B Frommer
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya, 464-8601, Japan
- Institute for Molecular Physiology, Düsseldorf, 40225, Germany
| | - Masayoshi Nakamura
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya, 464-8601, Japan
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16
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Zama N, Toda S. Designer cell therapy for tissue regeneration. Inflamm Regen 2024; 44:15. [PMID: 38491394 PMCID: PMC10941617 DOI: 10.1186/s41232-024-00327-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 03/06/2024] [Indexed: 03/18/2024] Open
Abstract
Cancer cell therapy, particularly chimeric antigen receptor (CAR) T-cell therapy for blood cancers, has emerged as a powerful new modality for cancer treatment. Therapeutic cells differ significantly from conventional drugs, such as small molecules and biologics, as they possess cellular information processing abilities to recognize and respond to abnormalities in the body. This capability enables the targeted delivery of therapeutic factors to specific locations and times. Various types of designer cells have been developed and tested to overcome the shortcomings of CAR T cells and expand their functions in the treatment of solid tumors. In particular, synthetic receptor technologies are a key to designing therapeutic cells that specifically improve tumor microenvironment. Such technologies demonstrate great potential for medical applications to regenerate damaged tissues as well that are difficult to cure with conventional drugs. In this review, we introduce recent developments in next-generation therapeutic cells for cancer treatment and discuss the application of designer therapeutic cells for tissue regeneration.
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Affiliation(s)
- Noyuri Zama
- WPI Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kakuma-machi, Kanazawa , 920-1192, Japan
- Graduate School of Frontier Science Initiative, Kanazawa University, Kakuma-machi, Kanazawa , 920-1192, Japan
| | - Satoshi Toda
- WPI Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kakuma-machi, Kanazawa , 920-1192, Japan.
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17
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Ma J, Xing F, Shimizu KI, Furukawa S. Active site tuning based on pseudo-binary alloys for low-temperature acetylene semihydrogenation. Chem Sci 2024; 15:4086-4094. [PMID: 38487246 PMCID: PMC10935689 DOI: 10.1039/d3sc03704e] [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: 07/18/2023] [Accepted: 01/25/2024] [Indexed: 03/17/2024] Open
Abstract
The development of an efficient catalytic system for low-temperature acetylene semihydrogenation using nonnoble metals is important for the cost-effective production of polymer-grade pure ethylene. However, it remains challenging owing to the intrinsic low activity. Herein, we report a flexibly tunable catalyst design concept based on a pseudo-binary alloy, which enabled a remarkable enhancement in the catalytic activity, selectivity, and durability of a Ni-based material. A series of (Ni1-xCux)3Ga/TiO2 catalysts exhibiting L12-type pseudo-binary alloy structures with various Cu contents (x = 0.2, 0.25, 0.33, 0.5, 0.6, and 0.75) were prepared for active site tuning. The optimal catalyst, (Ni0.8Cu0.2)3Ga/TiO2, exhibited outstandingly high catalytic activity among reported 3d transition metal-based systems and excellent ethylene selectivity (96%) and long-term stability (100 h) with near full conversion even at 150 °C. A mechanistic study revealed that Ni2Cu hollow sites on the (111) surface weakened the strong adsorption of acetylene and vinyl adsorbate, which significantly accelerated the hydrogenation process and inhibited undesired ethane formation.
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Affiliation(s)
- Jiamin Ma
- Institute for Catalysis, Hokkaido University Sapporo 001-0021 Japan
| | - Feilong Xing
- Institute for Catalysis, Hokkaido University Sapporo 001-0021 Japan
| | - Ken-Ichi Shimizu
- Institute for Catalysis, Hokkaido University Sapporo 001-0021 Japan
| | - Shinya Furukawa
- Institute for Catalysis, Hokkaido University Sapporo 001-0021 Japan
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18
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Ikai T, Mishima N, Matsumoto T, Miyoshi S, Oki K, Yashima E. 2,2'-Tethered Binaphthyl-Embedded One-Handed Helical Ladder Polymers: Impact of the Tether Length on Helical Geometry and Chiroptical Property. Angew Chem Int Ed Engl 2024; 63:e202318712. [PMID: 38253965 DOI: 10.1002/anie.202318712] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 01/20/2024] [Accepted: 01/22/2024] [Indexed: 01/24/2024]
Abstract
Synthetic breakthroughs diversify the molecules and polymers available to chemists. We now report the first successful synthesis of a series of optically-pure 2,2'-tethered binaphthyl-embedded helical ladder polymers based on quantitative and chemoselective ladderization by the modified alkyne benzannulations using the 4-alkoxy-2,6-dimethylphenylethynyl group as the alkyne source, inaccessible by the conventional approach lacking the 2,6-dimethyl substituents. Due to the defect-free helix formation, the circular dichroism signal increased by more than 6 times the previously reported value. The resulting helical secondary structure can be fine-tuned by controlling the binaphthyl dihedral angle in the repeating unit with variations in the 2,2'-alkylenedioxy tethering groups by one carbon atom at a time. The optimization of the helical ladder structures led to a strong circularly polarized luminescence with a high fluorescence quantum yield (28 %) and luminescence dissymmetry factor (2.6×10-3 ).
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Affiliation(s)
- Tomoyuki Ikai
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering, Nagoya University Chikusa-ku, Nagoya, 464-8603, Japan
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST) Kawaguchi, Saitama, 332-0012, Japan
| | - Namiki Mishima
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering, Nagoya University Chikusa-ku, Nagoya, 464-8603, Japan
| | - Takehiro Matsumoto
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering, Nagoya University Chikusa-ku, Nagoya, 464-8603, Japan
| | - Sayaka Miyoshi
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering, Nagoya University Chikusa-ku, Nagoya, 464-8603, Japan
| | - Kosuke Oki
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering, Nagoya University Chikusa-ku, Nagoya, 464-8603, Japan
| | - Eiji Yashima
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering, Nagoya University Chikusa-ku, Nagoya, 464-8603, Japan
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19
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Suetsugu K, Nakamura Y, Nakano T, Tagane S. Relictithismia kimotsukiensis, a new genus and species of Thismiaceae from southern Japan with discussions on its phylogenetic relationship. J Plant Res 2024:10.1007/s10265-024-01532-5. [PMID: 38421521 DOI: 10.1007/s10265-024-01532-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 02/05/2024] [Indexed: 03/02/2024]
Abstract
The family Thismiaceae, known as "fairy lanterns" for their urn- or bell-shaped flowers with basally fused tepals, consists of non-photosynthetic flowering monocots mainly in tropical regions, extending into subtropical and temperate areas. Here, we propose a new mycoheterotrophic genus, Relictithismia Suetsugu & Tagane (Thismiaceae), with its monotypic species Relictithismia kimotsukiensis Suetsugu, Yas.Nakam. & Tagane from Kimotsuki Mountains in the Osumi Peninsula, Kagoshima Prefecture, Kyushu Island, southern Japan. Relictithismia resembles Haplothismia Airy Shaw in having a cluster of tuberous roots, a feature previously observed only in this genus within the family Thismiaceae. However, it differs in having solitary flowers (vs. 2-6-flowered pseudo-raceme in Haplothismia), anther thecae largely separated (vs. connate), and the presence of an annulus (vs. absent). Additionally, Relictithismia differs from the geographically overlapping genus Thismia Griff. in its stamen structure and the position of the annulus. In Relictithismia, the stamens lack connectives, and its free filaments arise from the annulus located inside the perianth mouth, while in Thismia, the stamens typically have connate connectives, forming a staminal tube pendulous from the annulus located at the mouth of the floral tube. Our morphological and phylogenetic data indicated that R. kimotsukiensis holds an early-diverging position within the family, situated outside the Old World Thismia clade. This paper offers an extensive description and color photographs of R. kimotsukiensis, complemented by notes on its phylogenetic relationship and evolutionary history.
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Affiliation(s)
- Kenji Suetsugu
- Department of Biology, Graduate School of Science, Kobe University, Kobe, Hyogo, 657-8501, Japan.
- Institute for Advanced Research, Kobe University, 1-1 Rokkodai, Nada-Ku, Kobe, Hyogo, 657-8501, Japan.
| | | | - Takafumi Nakano
- Department of Zoology, Graduate School of Science, Kyoto University, Sakyo-Ku, Kyoto, 606-8502, Japan
| | - Shuichiro Tagane
- Kagoshima University Museum, Kagoshima University, 1-21-30, Korimoto, Kagoshima, 890-0065, Japan.
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20
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Nishihara R, Dokainish HM, Kihara Y, Ashiba H, Sugita Y, Kurita R. Pseudo-Luciferase Activity of the SARS-CoV-2 Spike Protein for Cypridina Luciferin. ACS Cent Sci 2024; 10:283-290. [PMID: 38435535 PMCID: PMC10906034 DOI: 10.1021/acscentsci.3c00887] [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] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 11/21/2023] [Accepted: 12/19/2023] [Indexed: 03/05/2024]
Abstract
Enzymatic reactions that involve a luminescent substrate (luciferin) and enzyme (luciferase) from luminous organisms enable a luminescence detection of target proteins and cells with high specificity, albeit that conventional assay design requires a prelabeling of target molecules with luciferase. Here, we report a luciferase-independent luminescence assay in which the target protein directly catalyzes the oxidative luminescence reaction of luciferin. The SARS-CoV-2 antigen (spike) protein catalyzes the light emission of Cypridina luciferin, whereas no such catalytic function was observed for salivary proteins. This selective luminescence reaction is due to the enzymatic recognition of the 3-(1-guanidino)propyl group in luciferin at the interfaces between the units of the spike protein, allowing a specific detection of the spike protein in human saliva without sample pretreatment. This method offers a novel platform to detect virus antigens simply and rapidly without genetic manipulation or antibodies.
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Affiliation(s)
- Ryo Nishihara
- National
Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan
- Japan
Science and Technology Agency (JST), PREST, 4-1-8, Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Hisham M. Dokainish
- Faculty
of Pharmaceutical Sciences, Hokkaido University, Nishi 6 Kita12 Kita-ku, Sapporo 060-0812, Japan
- Theoretical
Molecular Science Laboratory, RIKEN Cluster
for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yoshiki Kihara
- National
Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan
- Faculty
of
Pure and Applied Sciences, University of
Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Hiroki Ashiba
- National
Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan
| | - Yuji Sugita
- Theoretical
Molecular Science Laboratory, RIKEN Cluster
for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Laboratory
for Biomolecular Function Simulation, RIKEN
Center for Biosystems Dynamics Research, 6-7-1 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
- Computational
Biophysics Research Team, RIKEN Center for
Computational Science, 6-7-1 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
| | - Ryoji Kurita
- National
Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan
- Faculty
of
Pure and Applied Sciences, University of
Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
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21
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Mii Y. Understanding and manipulating extracellular behaviors of Wnt ligands. In Vitro Cell Dev Biol Anim 2024:10.1007/s11626-024-00856-9. [PMID: 38379096 DOI: 10.1007/s11626-024-00856-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 01/17/2024] [Indexed: 02/22/2024]
Abstract
Wnt, a family of secreted signaling proteins, serves diverse functions in embryogenesis, organogenesis, cancer, and stem cell functions. In the context of development, Wnt has been considered a representative morphogen, forming concentration gradients to give positional information to cells or tissues. However, although gradients are often illustrated in schemata, the reality of concentration gradients, or in other words, actual spatial distribution of Wnt ligands, and their behaviors in the extracellular space still remain poorly known. To understand extracellular behavior of Wnt ligands, quantitative analyses such as fluorescence correlation spectroscopy (FCS) and fluorescence recovery after photobleaching (FRAP) are highly informative because Wnt dispersal involves physical and biochemical processes, such as diffusion and binding to or dissociation from cell surface molecules, including heparan sulfate proteoglycans (HSPGs). Here, I briefly discuss representative methods to quantify morphogen dynamics. In addition, I discuss molecular manipulations of morphogens, mainly focusing on use of protein binders, and synthetic biology of morphogens as indicators of current and future directions in this field.
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Affiliation(s)
- Yusuke Mii
- National Institute for Basic Biology (NIBB) and Exploratory Research Center On Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi, 444-8787, Japan.
- The Graduate University for Advanced Studies (SOKENDAI), Okazaki, Aichi, 444-8787, Japan.
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22
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Kamada Y, Umeda C, Mukai Y, Ohtsuka H, Otsubo Y, Yamashita A, Kosugi T. Structure-based engineering of Tor complexes reveals that two types of yeast TORC1 produce distinct phenotypes. J Cell Sci 2024; 137:jcs261625. [PMID: 38415789 PMCID: PMC10941655 DOI: 10.1242/jcs.261625] [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: 09/06/2023] [Accepted: 01/18/2024] [Indexed: 02/29/2024] Open
Abstract
Certain proteins assemble into diverse complex states, each having a distinct and unique function in the cell. Target of rapamycin (Tor) complex 1 (TORC1) plays a central role in signalling pathways that allow cells to respond to the environment, including nutritional status signalling. TORC1 is widely recognised for its association with various diseases. The budding yeast Saccharomyces cerevisiae has two types of TORC1, Tor1-containing TORC1 and Tor2-containing TORC1, which comprise different constituent proteins but are considered to have the same function. Here, we computationally modelled the relevant complex structures and then, based on the structures, rationally engineered a Tor2 mutant that could form Tor complex 2 (TORC2) but not TORC1, resulting in a redesign of the complex states. Functional analysis of the Tor2 mutant revealed that the two types of TORC1 induce different phenotypes, with changes observed in rapamycin, caffeine and pH dependencies of cell growth, as well as in replicative and chronological lifespan. These findings uncovered by a general approach with huge potential - model structure-based engineering - are expected to provide further insights into various fields such as molecular evolution and lifespan.
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Affiliation(s)
- Yoshiaki Kamada
- Interdisciplinary Research Unit, National Institute for Basic Biology (NIBB), National Institutes of Natural Sciences (NINS), Okazaki, Aichi, 444-8585, Japan
- Basic Biology Program, SOKENDAI (The Graduate University for Advanced Studies), Hayama, Kanagawa, 240-0193, Japan
| | - Chiharu Umeda
- Department of Frontier Bioscience, Nagahama Institute of Bio-Science and Technology, Nagahama, Shiga, 526-0829, Japan
| | - Yukio Mukai
- Department of Frontier Bioscience, Nagahama Institute of Bio-Science and Technology, Nagahama, Shiga, 526-0829, Japan
| | - Hokuto Ohtsuka
- Laboratory of Molecular Microbiology, Graduate School of Pharmaceutical Sciences, Nagoya University, Nagoya, Aichi, 464-8601, Japan
| | - Yoko Otsubo
- Interdisciplinary Research Unit, National Institute for Basic Biology (NIBB), National Institutes of Natural Sciences (NINS), Okazaki, Aichi, 444-8585, Japan
| | - Akira Yamashita
- Interdisciplinary Research Unit, National Institute for Basic Biology (NIBB), National Institutes of Natural Sciences (NINS), Okazaki, Aichi, 444-8585, Japan
| | - Takahiro Kosugi
- Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science (IMS), National Institutes of Natural Sciences (NINS), Okazaki, Aichi, 444-8585, Japan
- Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences (NINS), Okazaki, Aichi, 444-8585, Japan
- Molecular Science Program, SOKENDAI (The Graduate University for Advanced Studies), Hayama, Kanagawa, 240-0193, Japan
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency, Kawaguchi, Saitama, 332-0012, Japan
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23
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Kuwahara T, Long Y, Sayilan A, Reichenbach T, Martin JM, De Barros Bouchet MI, Moseler M, Moras G. Superlubricity of Silicon-Based Ceramics Sliding against Hydrogenated Amorphous Carbon in Ultrahigh Vacuum: Mechanisms of Transfer Film Formation. ACS Appl Mater Interfaces 2024; 16:8032-8044. [PMID: 38291784 PMCID: PMC10876050 DOI: 10.1021/acsami.3c16286] [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: 10/31/2023] [Revised: 12/21/2023] [Accepted: 12/22/2023] [Indexed: 02/01/2024]
Abstract
Tribological interfaces between silicon-based ceramics, such as Si3N4 or SiC, are characterized by high friction and wear in unlubricated conditions. A solution to this problem is to use them in combination with a hydrogenated amorphous carbon (a-C:H) countersurface from which a passivating carbon film is transferred onto the ceramic surface. However, the mechanisms underlying a stable film transfer process and the conditions that favor it remain elusive. Here, we present friction experiments in ultrahigh vacuum in which friction coefficients lower than 0.01 are achieved by sliding Si3N4 against a-C:H with 36 at. % hydrogen but not against a-C:H with 20 at. % hydrogen. Chemical surface analyses confirm that the superlubric interface forms via the transfer of a hydrocarbon nanofilm onto the Si3N4 surface. Quantum-mechanical simulations reveal that a stable passivating a-C:H film can only be transferred if, after initial cold welding of the tribological interface, the plastic shear deformation is localized within the a-C:H coating. This occurs if the yield shear stress for plastic flow of a-C:H is lower than that of the ceramic and of the shear strength of the a-C:H-ceramic interface, i.e., if the a-C:H hydrogen content ranges between ∼30 and ∼50 at. %. While the importance of a relatively high hydrogen content to achieve an efficient passivation of a-C:H surfaces in a vacuum is well-documented, this work reveals how the hydrogen content is also crucial for obtaining a stable a-C:H transfer film. These results can be extended to glass, SiC, and steel, supporting the generality of the proposed mechanism.
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Affiliation(s)
- Takuya Kuwahara
- Fraunhofer
IWM, MikroTribologie Centrum μTC, Wöhlerstraße 11, 79108 Freiburg, Germany
- Department
of Mechanical Engineering, Osaka Metropolitan
University, 3-3-138 Sugimoto, Sumiyoshi-ku, 558-8585 Osaka, Japan
| | - Yun Long
- Laboratory
of Tribology and System Dynamics, CNRS, UMR5513, University of Lyon, Ecole Centrale de Lyon, 69130 Ecully, France
| | - Aslihan Sayilan
- Laboratory
of Tribology and System Dynamics, CNRS, UMR5513, University of Lyon, Ecole Centrale de Lyon, 69130 Ecully, France
| | - Thomas Reichenbach
- Fraunhofer
IWM, MikroTribologie Centrum μTC, Wöhlerstraße 11, 79108 Freiburg, Germany
| | - Jean Michel Martin
- Laboratory
of Tribology and System Dynamics, CNRS, UMR5513, University of Lyon, Ecole Centrale de Lyon, 69130 Ecully, France
| | - Maria-Isabel De Barros Bouchet
- Laboratory
of Tribology and System Dynamics, CNRS, UMR5513, University of Lyon, Ecole Centrale de Lyon, 69130 Ecully, France
| | - Michael Moseler
- Fraunhofer
IWM, MikroTribologie Centrum μTC, Wöhlerstraße 11, 79108 Freiburg, Germany
- Institute
of Physics, University of Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany
- Freiburg
Materials Research Center, University of
Freiburg, Stefan-Meier-Straße
21, 79104 Freiburg, Germany
- Cluster of
Excellence livMatS, Freiburg Center for Interactive Materials and
Bioinspired Technologies, University of
Freiburg, Georges-Köhler-Allee
105, 79110 Freiburg, Germany
| | - Gianpietro Moras
- Fraunhofer
IWM, MikroTribologie Centrum μTC, Wöhlerstraße 11, 79108 Freiburg, Germany
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24
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Bhattacharya S, Ohto T, Tada H, Saha SK. Interfacial negative magnetization in Ni encapsulated layer-tunable nested MoS 2 nanostructure with robust memory applications. Nanoscale Adv 2024; 6:1091-1105. [PMID: 38356617 PMCID: PMC10863702 DOI: 10.1039/d3na00343d] [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] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 11/03/2023] [Indexed: 02/16/2024]
Abstract
Combining interfacial interactions and layer-number tunability, the evolution of magnetism in low-dimensional diamagnetic systems like MoS2 is indeed an interesting area of research. To explore this, Ni nanophases with an average size of 12 nm were encapsulated in MoS2 and the magnetization dynamics were studied over the temperature range of 2-300 K. Surprisingly, the newly formed hybrid nanostructure was found to have a negative magnetization state with giant exchange bias that showed a reversible temperature-induced increase in both spin magnetic moment and coercivity. Density functional theory calculations proved an interfacial charge transfer interaction with a spin-polarized density of states. The magnetization state, along with giant exchange correlation among the magnetic clusters, suggested the possibility of robust thermomagnetic memory. The dc magnetization and relaxation, investigated with different measurement protocols, unveiled robust thermoremanent magnetization as a memory effect. The time-dependent magnetization study indicated that contributions from the negative magnetization state along with charge transfer induced spin states are responsible for the memory effect, which can be controlled by both temperature and external field.
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Affiliation(s)
- Shatabda Bhattacharya
- School of Materials Sciences, Indian Association for the Cultivation of Science Jadavpur Kolkata-700032 India
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University Toyonaka 560-8531 Japan
| | - Tatsuhiko Ohto
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University Toyonaka 560-8531 Japan
| | - Hirokazu Tada
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University Toyonaka 560-8531 Japan
| | - Shyamal K Saha
- School of Materials Sciences, Indian Association for the Cultivation of Science Jadavpur Kolkata-700032 India
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25
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Sasaki Y, Lyu X, Kawashima T, Zhang Y, Ohshiro K, Okabe K, Tsuchiya K, Minami T. Nanoarchitectonics of highly dispersed polythiophene on paper for accurate quantitative detection of metal ions. RSC Adv 2024; 14:5159-5166. [PMID: 38332791 PMCID: PMC10851342 DOI: 10.1039/d3ra08429a] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Accepted: 01/23/2024] [Indexed: 02/10/2024] Open
Abstract
π-Conjugated polymers such as polythiophene provide intramolecular wire effects upon analyte capture, which contribute to sensitive detection in chemical sensing. However, inherent aggregation-induced quenching causes difficulty in fluorescent chemical sensing in the solid state. Herein, we propose a solid-state fluorescent chemosensor array device made of a paper substrate (PCSAD) for the qualitative and quantitative detection of metal ions. A polythiophene derivative modified by dipicolylamine moieties (1poly), which shows optical changes upon the addition of target metal ions (i.e., Cu2+, Cd2+, Ni2+, Co2+, Pb2+, Zn2+, and Hg2+), was highly dispersed on the paper substrate using office apparatus. In this regard, morphological observation of the PCSAD after printing of 1poly suggested the contribution of the fiber structures of the paper substrate to the homogeneous dispersion of 1poly ink to suppress aggregation-induced quenching. The optical changes in the PCSAD upon the addition of metal ions was rapidly recorded using a smartphone, which was further applied to imaging analysis and pattern recognition techniques for high-throughput sensing. Indeed, the printed PCSAD embedded with 1poly achieved the accurate detection of metal ions at ppm levels contained in river water. The limit of detection of the PCSAD-based sensing system using a smartphone (48 ppb for Cu2+ ions) is comparable to that of a solution-based sensing system using a stationary spectrophotometer (16 ppb for Cu2+ ions). Therefore, the methodology based on a combination of a paper-based sensor array and a π-conjugated polymer will be a promising approach for solid-state fluorescent chemosensors.
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Affiliation(s)
- Yui Sasaki
- Institute of Industrial Science, The University of Tokyo 4-6-1 Komaba, Meguro-ku Tokyo 153-8505 Japan
- JST, PRESTO 4-1-8 Honcho Kawaguchi Saitama 332-0012 Japan
| | - Xiaojun Lyu
- Institute of Industrial Science, The University of Tokyo 4-6-1 Komaba, Meguro-ku Tokyo 153-8505 Japan
| | - Takayuki Kawashima
- Institute of Industrial Science, The University of Tokyo 4-6-1 Komaba, Meguro-ku Tokyo 153-8505 Japan
| | - Yijing Zhang
- Institute of Industrial Science, The University of Tokyo 4-6-1 Komaba, Meguro-ku Tokyo 153-8505 Japan
| | - Kohei Ohshiro
- Institute of Industrial Science, The University of Tokyo 4-6-1 Komaba, Meguro-ku Tokyo 153-8505 Japan
| | - Kiyosumi Okabe
- Institute of Industrial Science, The University of Tokyo 4-6-1 Komaba, Meguro-ku Tokyo 153-8505 Japan
| | - Kazuhiko Tsuchiya
- Institute of Industrial Science, The University of Tokyo 4-6-1 Komaba, Meguro-ku Tokyo 153-8505 Japan
| | - Tsuyoshi Minami
- Institute of Industrial Science, The University of Tokyo 4-6-1 Komaba, Meguro-ku Tokyo 153-8505 Japan
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26
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Aso R, Katsumata T, Nakamura T, Watase Y, Amezawa K, Murakami Y. Structural and electronic characterization of fluorine-doped La0.5Sr0.5CoO3-δ using electron energy-loss spectroscopy. Microscopy (Oxf) 2024; 73:22-30. [PMID: 37243701 DOI: 10.1093/jmicro/dfad031] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 05/23/2023] [Accepted: 05/25/2023] [Indexed: 05/29/2023] Open
Abstract
Perovskite oxides, ABO3, are potential catalysts for the oxygen evolution reaction, which is important in the production of hydrogen as a sustainable energy resource. Optimizing the chemical composition of such oxides by substitution or doping with additional elements is an effective approach to improving the activity of such catalysts. Here, we characterized the crystal and electronic structures of fluorine-doped La0.5Sr0.5CoO3-δ particles using scanning transmission electron microscopy (STEM) and electron energy-loss spectroscopy (EELS). High-resolution STEM imaging demonstrated the formation of a disordered surface phase caused by fluorine doping. In addition, spatially resolved EELS data showed that fluorine anions were introduced into the interiors of the particles and that Co ions near the surfaces were slightly reduced by fluorine doping in conjunction with the loss of oxygen ions. Peak fitting of energy-loss near-edge structure data demonstrated an unexpected nanostructure in the vicinity of the surface. An EELS characterization comprising elemental mapping together with an energy-loss near-edge structure analysis indicated that this nanostructure could not be assigned to Co-based materials but rather to the solid electrolyte BaF2. Complementary structural and electronic characterizations using STEM and EELS as demonstrated herein evidently have the potential to play an increasingly important role in elucidating the nanostructures of functional materials.
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Affiliation(s)
- Ryotaro Aso
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Takuya Katsumata
- Graduate School of Engineering, Tohoku University, 6-6-1 Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Takashi Nakamura
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Yusuke Watase
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Koji Amezawa
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Yasukazu Murakami
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- The Ultramicroscopy Research Center, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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27
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Ueda T, Takeuchi T, Fujikake N, Suzuki M, Minakawa EN, Ueyama M, Fujino Y, Kimura N, Nagano S, Yokoseki A, Onodera O, Mochizuki H, Mizuno T, Wada K, Nagai Y. Dysregulation of stress granule dynamics by DCTN1 deficiency exacerbates TDP-43 pathology in Drosophila models of ALS/FTD. Acta Neuropathol Commun 2024; 12:20. [PMID: 38311779 PMCID: PMC10840176 DOI: 10.1186/s40478-024-01729-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 01/11/2024] [Indexed: 02/06/2024] Open
Abstract
The abnormal aggregation of TDP-43 into cytoplasmic inclusions in affected neurons is a major pathological hallmark of amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). Although TDP-43 is aberrantly accumulated in the neurons of most patients with sporadic ALS/FTD and other TDP-43 proteinopathies, how TDP-43 forms cytoplasmic aggregates remains unknown. In this study, we show that a deficiency in DCTN1, a subunit of the microtubule-associated motor protein complex dynactin, perturbs the dynamics of stress granules and drives the formation of TDP-43 cytoplasmic aggregation in cultured cells, leading to the exacerbation of TDP-43 pathology and neurodegeneration in vivo. We demonstrated using a Drosophila model of ALS/FTD that genetic knockdown of DCTN1 accelerates the formation of ubiquitin-positive cytoplasmic inclusions of TDP-43. Knockdown of components of other microtubule-associated motor protein complexes, including dynein and kinesin, also increased the formation of TDP-43 inclusions, indicating that intracellular transport along microtubules plays a key role in TDP-43 pathology. Notably, DCTN1 knockdown delayed the disassembly of stress granules in stressed cells, leading to an increase in the formation of pathological cytoplasmic inclusions of TDP-43. Our results indicate that a deficiency in DCTN1, as well as disruption of intracellular transport along microtubules, is a modifier that drives the formation of TDP-43 pathology through the dysregulation of stress granule dynamics.
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Affiliation(s)
- Tetsuhiro Ueda
- Department of Neurology, Faculty of Medicine, Kindai University, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan
- Department of Neurotherapeutics, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
- Department of Neurology, Kyoto Prefectural University of Medicine, Kyoto, 602-0841, Japan
| | - Toshihide Takeuchi
- Life Science Research Institute, Kindai University, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan.
- Department of Neurotherapeutics, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan.
| | - Nobuhiro Fujikake
- Department of Degenerative Neurological Diseases, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, 187-8502, Japan
| | - Mari Suzuki
- Department of Neurotherapeutics, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
- Department of Degenerative Neurological Diseases, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, 187-8502, Japan
| | - Eiko N Minakawa
- Department of Neurophysiology, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, 187-8502, Japan
| | - Morio Ueyama
- Department of Neurology, Faculty of Medicine, Kindai University, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan
- Department of Neurotherapeutics, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
- Department of Degenerative Neurological Diseases, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, 187-8502, Japan
| | - Yuzo Fujino
- Department of Neurology, Faculty of Medicine, Kindai University, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan
- Department of Neurology, Kyoto Prefectural University of Medicine, Kyoto, 602-0841, Japan
| | - Nobuyuki Kimura
- Department of Veterinary Associated Science, Faculty of Veterinary Medicine, Okayama University of Science, Ehime, 794-8555, Japan
| | - Seiichi Nagano
- Department of Neurotherapeutics, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
- Department of Neurology, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Akio Yokoseki
- Department of Neurology, Brain Research Institute, Niigata University, Niigata, 951-8585, Japan
| | - Osamu Onodera
- Department of Neurology, Brain Research Institute, Niigata University, Niigata, 951-8585, Japan
| | - Hideki Mochizuki
- Department of Neurology, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Toshiki Mizuno
- Department of Neurology, Kyoto Prefectural University of Medicine, Kyoto, 602-0841, Japan
| | - Keiji Wada
- Department of Degenerative Neurological Diseases, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, 187-8502, Japan
| | - Yoshitaka Nagai
- Department of Neurology, Faculty of Medicine, Kindai University, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan.
- Life Science Research Institute, Kindai University, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan.
- Department of Neurotherapeutics, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan.
- Department of Neurology, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan.
- Department of Degenerative Neurological Diseases, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, 187-8502, Japan.
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28
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Nakai S, Kitanishi T, Mizuseki K. Distinct manifold encoding of navigational information in the subiculum and hippocampus. Sci Adv 2024; 10:eadi4471. [PMID: 38295173 PMCID: PMC10830115 DOI: 10.1126/sciadv.adi4471] [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] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 12/29/2023] [Indexed: 02/02/2024]
Abstract
The subiculum (SUB) plays a crucial role in spatial navigation and encodes navigational information differently from the hippocampal CA1 area. However, the representation of subicular population activity remains unknown. Here, we investigated the neuronal population activity recorded extracellularly from the CA1 and SUB of rats performing T-maze and open-field tasks. The trajectory of population activity in both areas was confined to low-dimensional neural manifolds homoeomorphic to external space. The manifolds conveyed position, speed, and future path information with higher decoding accuracy in the SUB than in the CA1. The manifolds exhibited common geometry across rats and regions for the CA1 and SUB and between tasks in the SUB. During post-task ripples in slow-wave sleep, population activity represented reward locations/events more frequently in the SUB than in CA1. Thus, the CA1 and SUB encode information distinctly into the neural manifolds that underlie navigational information processing during wakefulness and sleep.
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Affiliation(s)
- Shinya Nakai
- Department of Physiology, Graduate School of Medicine, Osaka Metropolitan University, Osaka 545-8585, Japan
- Department of Physiology, Graduate School of Medicine, Osaka City University, Osaka 545-8585, Japan
| | - Takuma Kitanishi
- Department of Physiology, Graduate School of Medicine, Osaka City University, Osaka 545-8585, Japan
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Meguro, Tokyo 153-8902, Japan
- Komaba Institute for Science, The University of Tokyo, Meguro, Tokyo 153-8902, Japan
- PRESTO, Japan Science and Technology Agency (JST), Kawaguchi, Saitama 332-0012, Japan
| | - Kenji Mizuseki
- Department of Physiology, Graduate School of Medicine, Osaka Metropolitan University, Osaka 545-8585, Japan
- Department of Physiology, Graduate School of Medicine, Osaka City University, Osaka 545-8585, Japan
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29
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Suetsugu K, Hirota SK, Shitara T, Ishida K, Nakato N, Hayakawa H, Suyama Y. The absence of bumblebees on an oceanic island blurs the species boundary of two closely related orchids. New Phytol 2024; 241:1321-1333. [PMID: 37847353 DOI: 10.1111/nph.19325] [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] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 09/26/2023] [Indexed: 10/18/2023]
Abstract
Oceanic islands offer valuable natural laboratories for studying evolution. The Izu Islands, with their recent geological origin, provide an exceptional opportunity to explore the initial evolution on oceanic islands. Another noteworthy aspect is the absence of bumblebee species on most Izu Islands. We used ecological, morphological, and molecular data to investigate the impact of bumblebee absence on the evolution of two closely related orchid species, Goodyera henryi and Goodyera similis, focusing on Kozu Island, the Izu Islands. Our investigation revealed that while G. henryi exclusively relies on a bumblebee species for pollination on the mainland, G. similis is pollinated by scoliid wasps on both the mainland and the island. Intriguingly, all specimens initially categorized as G. henryi on Kozu Island are hybrids of G. henryi and G. similis, leading to the absence of pure G. henryi distribution on the island. These hybrids are pollinated by the scoliid wasp species that also pollinates G. similis on the island. The absence of bumblebees might result in sporadic and inefficient pollination of G. henryi by scoliid wasps, consequently promoting hybrid proliferation on the island. Our findings suggest that the absence of bumblebees can blur plant species boundaries.
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Affiliation(s)
- Kenji Suetsugu
- Department of Biology, Graduate School of Science, Kobe University, Kobe, Hyogo, 657-8501, Japan
- Institute for Advanced Research, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe, Hyogo, 657-8501, Japan
| | - Shun K Hirota
- Field Science Center, Graduate School of Agricultural Science, Tohoku University, 232-3 Yomogida, Naruko-onsen, Osaki, Miyagi, 989-6711, Japan
- Botanical Gardens, Osaka Metropolitan University, 2000 Kisaichi, Katano City, Osaka, 576-0004, Japan
| | - Takuto Shitara
- Tama Forest Science Garden, Forestry and Forest Products Research Institute, 1833-81 Todori-machi, Hachioji, Tokyo, 193-0843, Japan
| | | | - Narumi Nakato
- Narahashi 1-363, Higashiyamato-shi, Tokyo, 207-0031, Japan
| | - Hiroshi Hayakawa
- Museum of Natural and Environmental History, Shizuoka, 5762 Oya, Suruga, Shizuoka, Shizuoka, 422-8017, Japan
| | - Yoshihisa Suyama
- Field Science Center, Graduate School of Agricultural Science, Tohoku University, 232-3 Yomogida, Naruko-onsen, Osaki, Miyagi, 989-6711, Japan
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30
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Sagou K, Sato Y, Okuno Y, Watanabe T, Inagaki T, Motooka Y, Toyokuni S, Murata T, Kiyoi H, Kimura H. Epstein-Barr virus lytic gene BNRF1 promotes B-cell lymphomagenesis via IFI27 upregulation. PLoS Pathog 2024; 20:e1011954. [PMID: 38300891 PMCID: PMC10833513 DOI: 10.1371/journal.ppat.1011954] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 01/04/2024] [Indexed: 02/03/2024] Open
Abstract
Epstein-Barr virus (EBV) is a ubiquitous human lymphotropic herpesvirus that is causally associated with several malignancies. In addition to latent factors, lytic replication contributes to cancer development. In this study, we examined whether the lytic gene BNRF1, which is conserved among gamma-herpesviruses, has an important role in lymphomagenesis. We found that lymphoblastoid cell lines (LCLs) established by BNRF1-knockout EBV exhibited remarkably lower pathogenicity in a mice xenograft model than LCLs produced by wild-type EBV (LCLs-WT). RNA-seq analyses revealed that BNRF1 elicited the expression of interferon-inducible protein 27 (IFI27), which promotes cell proliferation. IFI27 knockdown in LCLs-WT resulted in excessive production of reactive oxygen species, leading to cell death and significantly decreased their pathogenicity in vivo. We also confirmed that IFI27 was upregulated during primary infection in B-cells. Our findings revealed that BNRF1 promoted robust proliferation of the B-cells that were transformed by EBV latent infection via IFI27 upregulation both in vitro and in vivo.
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Affiliation(s)
- Ken Sagou
- Department of Virology, Nagoya University Graduate School of Medicine, Nagoya, Japan
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yoshitaka Sato
- Department of Virology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yusuke Okuno
- Department of Virology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Takahiro Watanabe
- Department of Virology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Tomoki Inagaki
- Department of Virology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yashiro Motooka
- Department of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shinya Toyokuni
- Department of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Takayuki Murata
- Department of Virology, Fujita Health University School of Medicine, Toyoake, Japan
| | - Hitoshi Kiyoi
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hiroshi Kimura
- Department of Virology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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31
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Maeki M, Uno S, Sugiura K, Sato Y, Fujioka Y, Ishida A, Ohba Y, Harashima H, Tokeshi M. Development of Polymer-Lipid Hybrid Nanoparticles for Large-Sized Plasmid DNA Transfection. ACS Appl Mater Interfaces 2024; 16:2110-2119. [PMID: 38141015 PMCID: PMC10798250 DOI: 10.1021/acsami.3c14714] [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] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 12/05/2023] [Accepted: 12/06/2023] [Indexed: 12/24/2023]
Abstract
RNA and DNA delivery technologies using lipid nanoparticles (LNPs) have advanced significantly, as demonstrated by their successful application in mRNA vaccines. To date, commercially available RNA therapeutics include Onpattro, a 21 bp siRNA, and mRNA vaccines comprising 4300 nucleotides for COVID-19. However, a significant challenge remains in achieving efficient transfection, as the size of the delivered RNA and DNA increases. In contrast to RNA transfection, plasmid DNA (pDNA) transfection requires multiple steps, including cellular uptake, endosomal escape, nuclear translocation, transcription, and translation. The low transfection efficiency of large pDNA is a critical limitation in the development of artificial cells and their cellular functionalization. Here, we introduce polymer-lipid hybrid nanoparticles designed for efficient, large-sized pDNA transfection. We demonstrated that LNPs loaded with positively charged pDNA-polycation core nanoparticles exhibited a 4-fold increase in transfection efficiency for 15 kbp pDNA compared with conventional LNPs, which encapsulate a negatively charged pDNA-polycation core. Based on assessments of the size and internal structure of the polymer-lipid nanoparticles as well as hemolysis and cellular uptake analysis, we propose a strategy to enhance large-sized pDNA transfection using LNPs. This approach holds promise for accelerating the in vivo delivery of large-sized pDNA and advancing the development of artificial cells.
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Affiliation(s)
- Masatoshi Maeki
- Division
of Applied Chemistry, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
- JST
PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
- Institute
of Materials Structure Science, High Energy
Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - Shuya Uno
- Graduate
School of Chemical Sciences and Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| | - Kaisei Sugiura
- Graduate
School of Chemical Sciences and Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| | - Yusuke Sato
- Faculty
of Pharmaceutical Sciences, Hokkaido University, Kita 12 Nishi 8, Kita-ku, Sapporo 060-0812, Japan
| | - Yoichiro Fujioka
- Department
of Cell Physiology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15 Nishi 7, Kita-ku, Sapporo 060-8638, Japan
| | - Akihiko Ishida
- Division
of Applied Chemistry, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| | - Yusuke Ohba
- Department
of Cell Physiology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15 Nishi 7, Kita-ku, Sapporo 060-8638, Japan
| | - Hideyoshi Harashima
- Graduate
School of Chemical Sciences and Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| | - Manabu Tokeshi
- JST
PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
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32
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Murayama H, Pearson CAB, Abbott S, Miura F, Jung SM, Fearon E, Funk S, Endo A. Accumulation of Immunity in Heavy-Tailed Sexual Contact Networks Shapes Mpox Outbreak Sizes. J Infect Dis 2024; 229:59-63. [PMID: 37402631 PMCID: PMC10786257 DOI: 10.1093/infdis/jiad254] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [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: 02/24/2023] [Revised: 06/06/2023] [Accepted: 06/30/2023] [Indexed: 07/06/2023] Open
Abstract
Many countries affected by the global outbreak of mpox in 2022 have observed a decline in cases. Our mathematical model accounting for heavy-tailed sexual partnership distributions suggests that mpox epidemics can hit the infection-derived herd immunity threshold and begin to decline, with <1% of sexually active men who have sex with men infected regardless of interventions or behavioral changes. We consistently found that many countries and US states experienced an epidemic peak, with cumulative cases of around 0.1% to 0.5% among men who have sex with men. The observed decline in cases may not necessarily be attributable to interventions or behavioral changes primarily.
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Affiliation(s)
- Hiroaki Murayama
- School of Medicine, International University of Health and Welfare, Narita, Japan
| | - Carl A B Pearson
- Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, United Kingdom
- Centre for Mathematical Modelling of Infectious Diseases, London School of Hygiene & Tropical Medicine, London, United Kingdom
- South African DSI-NRF Centre of Excellence in Epidemiological Modelling and Analysis, Stellenbosch University, Stellenbosch, Republic of South Africa
| | - Sam Abbott
- Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, United Kingdom
- Centre for Mathematical Modelling of Infectious Diseases, London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Fuminari Miura
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
- Center for Marine Environmental Studies, Ehime University, Ehime, Japan
| | - Sung-mok Jung
- Carolina Population Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Elizabeth Fearon
- Centre for Mathematical Modelling of Infectious Diseases, London School of Hygiene & Tropical Medicine, London, United Kingdom
- Department of Global Health and Development, London School of Hygiene & Tropical Medicine
- Institute for Global Health, University College London, London, United Kingdom
| | - Sebastian Funk
- Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, United Kingdom
- Centre for Mathematical Modelling of Infectious Diseases, London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Akira Endo
- Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, United Kingdom
- Centre for Mathematical Modelling of Infectious Diseases, London School of Hygiene & Tropical Medicine, London, United Kingdom
- School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki, Japan
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33
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Becker M, Loche P, Rezaei M, Wolde-Kidan A, Uematsu Y, Netz RR, Bonthuis DJ. Multiscale Modeling of Aqueous Electric Double Layers. Chem Rev 2024; 124:1-26. [PMID: 38118062 PMCID: PMC10785765 DOI: 10.1021/acs.chemrev.3c00307] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 11/17/2023] [Accepted: 11/30/2023] [Indexed: 12/22/2023]
Abstract
From the stability of colloidal suspensions to the charging of electrodes, electric double layers play a pivotal role in aqueous systems. The interactions between interfaces, water molecules, ions and other solutes making up the electrical double layer span length scales from Ångströms to micrometers and are notoriously complex. Therefore, explaining experimental observations in terms of the double layer's molecular structure has been a long-standing challenge in physical chemistry, yet recent advances in simulations techniques and computational power have led to tremendous progress. In particular, the past decades have seen the development of a multiscale theoretical framework based on the combination of quantum density functional theory, force-field based simulations and continuum theory. In this Review, we discuss these theoretical developments and make quantitative comparisons to experimental results from, among other techniques, sum-frequency generation, atomic-force microscopy, and electrokinetics. Starting from the vapor/water interface, we treat a range of qualitatively different types of surfaces, varying from soft to solid, from hydrophilic to hydrophobic, and from charged to uncharged.
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Affiliation(s)
| | - Philip Loche
- Fachbereich
Physik, Freie Universität Berlin, 14195 Berlin, Germany
- Laboratory
of Computational Science and Modeling, IMX, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Majid Rezaei
- Fachbereich
Physik, Freie Universität Berlin, 14195 Berlin, Germany
- Institute
of Theoretical Chemistry, Ulm University, 89081 Ulm, Germany
| | | | - Yuki Uematsu
- Department
of Physics and Information Technology, Kyushu
Institute of Technology, 820-8502 Iizuka, Japan
- PRESTO,
Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Roland R. Netz
- Fachbereich
Physik, Freie Universität Berlin, 14195 Berlin, Germany
| | - Douwe Jan Bonthuis
- Institute
of Theoretical and Computational Physics, Graz University of Technology, 8010 Graz, Austria
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34
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Toyota Y, Sagawa M, Yamashita S, Okayasu Y, Nagai Y, Okada Y, Kobayashi Y. Effect of the bulkiness of alkyl ligands on the excited-state dynamics of ZnO nanocrystals. RSC Adv 2024; 14:2796-2803. [PMID: 38234874 PMCID: PMC10792356 DOI: 10.1039/d3ra05166h] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 01/10/2024] [Indexed: 01/19/2024] Open
Abstract
Organic ligands on the surface of nanocrystals (NCs) are extremely important in influencing various physical properties, such as dispersibility, electrical properties, and optical properties. Recent studies have revealed that a slight difference in the molecular structure of aliphatic organic ligands significantly affects the dispersibility of the NCs. On the other hand, the effects of the difference in the molecular structure of ligands on the excited-state dynamics of NCs remain elusive. In this study, we synthesized a series of colloidal ZnO NCs capped with different alkyl phosphonic acids and investigated their photophysical properties using emission decay measurements and transient absorption spectroscopy. The spectral shape and lifetime of the emission originating from the surface oxygen defects of ZnO NCs are almost the same irrespective of the alkyl phosphonic ligands used, indicating that the electronic states of the surface oxygen defects are not affected by the bulkiness of the ligand. On the other hand, the emission quantum yield correlates with the rate of carrier trapping by oxygen defects, suggesting that the rate of carrier trapping reflects the number of oxygen defects. Revealing the detailed relationship between molecular structures of organic ligands and the optical properties of NCs is important for advanced photofunctional superstructures using semiconductor NCs.
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Affiliation(s)
- Yuto Toyota
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University Kusatsu Shiga 525-8577 Japan +81-77-561-3915
| | - Masahiko Sagawa
- Department of Applied Biological Science, Tokyo University of Agriculture and Technology Tokyo 183-8509 Japan
| | - Shohei Yamashita
- Department of Applied Biological Science, Tokyo University of Agriculture and Technology Tokyo 183-8509 Japan
| | - Yoshinori Okayasu
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University Kusatsu Shiga 525-8577 Japan +81-77-561-3915
| | - Yuki Nagai
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University Kusatsu Shiga 525-8577 Japan +81-77-561-3915
| | - Yohei Okada
- Department of Applied Biological Science, Tokyo University of Agriculture and Technology Tokyo 183-8509 Japan
| | - Yoichi Kobayashi
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University Kusatsu Shiga 525-8577 Japan +81-77-561-3915
- Precursory Research for Embryonic Science and Technology (PRESTO), Science and Technology Agency (JST) 4-1-8 Honcho Kawaguchi Saitama 332-0012 Japan
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35
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Mineo AM, Katsumata R. A Versatile Comonomer Additive for Radically Recyclable Vinyl-derived Polymers. Angew Chem Int Ed Engl 2024; 63:e202316248. [PMID: 38029360 DOI: 10.1002/anie.202316248] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 11/28/2023] [Accepted: 11/29/2023] [Indexed: 12/01/2023]
Abstract
Radically-formed, vinyl-derived polymers account for over 30 % of polymer production. Connected through stable carbon-carbon bonds, these materials are notoriously challenging to chemically recycle. Herein, we report universal copolymerization of a cyclic allyl sulfide (CAS) additive with multiple monomers under free-radical conditions, to introduce main-chain dynamic motifs. Backbone allyl sulfides undergo post-polymerization radical rearrangement via addition-fragmentation-transfer (AFT) that fosters both chain scission and extension. Scission is selectively induced through allyl sulfide exchange with small molecule thiyl radicals, resulting in oligomers as low as 14 % of the initial molar mass. Crucially, oligomers retain allyl sulfide end groups, enabling their extension with monomer under radical conditions. Extended, i.e., recycled, product molar mass is tunable through the ratio of monomer to oligomer, and can surpass that of the initial copolymer. Two scission-extension cycles are demonstrated in copolymers with methyl methacrylate and styrene without escalation in dispersity. In illustration of forming higher-value products, i.e., upcycling, we synthesized block copolymers through the extension of oligomers with a different vinyl monomer. Collectively, our approach to chemical recycling is unparalleled in its ability to 1) function in a variety of vinyl-derived polymers, 2) complete radical closed-loop cycling, and 3) upcycle waste material.
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Affiliation(s)
- Autumn M Mineo
- Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - Reika Katsumata
- Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, MA 01003, USA
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36
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Harimoto T, Tadokoro T, Sugiyama S, Suzuki T, Ishigaki Y. Domino-Redox Reaction Induced by An Electrochemically Triggered Conformational Change. Angew Chem Int Ed Engl 2024; 63:e202316753. [PMID: 37971082 DOI: 10.1002/anie.202316753] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Revised: 11/16/2023] [Accepted: 11/16/2023] [Indexed: 11/19/2023]
Abstract
The concept of a domino-type reaction has been applied in a wide range of fields such as synthetic organic chemistry, material engineering, and life science. To extend the domino concept to redox chemistry, we designed and synthesized a dimeric quinodimethane (QD) with a nonplanar dithiin spacer. The domino-redox properties can be activated by raising the temperature, based on a thermally equilibrated twisted conformation of QD, which has a higher HOMO level that is more readily oxidized. After one QD unit is oxidized (trigger), steric repulsion and electronic interaction between electrophores make the neighboring QD unit adopt a twisted conformation (domino process), which facilitates the following oxidation. Thus, a domino-redox reaction was achieved for the first time by a change in the HOMO level due to a drastic change in the molecular conformation.
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Affiliation(s)
- Takashi Harimoto
- Department of Chemistry, Faculty of Science, Hokkaido University, N10 W8, North-ward, Sapporo, 060-0810, Japan
| | - Tomoki Tadokoro
- Department of Chemistry, Faculty of Science, Hokkaido University, N10 W8, North-ward, Sapporo, 060-0810, Japan
| | - Soichiro Sugiyama
- Department of Chemistry, Faculty of Science, Hokkaido University, N10 W8, North-ward, Sapporo, 060-0810, Japan
| | - Takanori Suzuki
- Department of Chemistry, Faculty of Science, Hokkaido University, N10 W8, North-ward, Sapporo, 060-0810, Japan
| | - Yusuke Ishigaki
- Department of Chemistry, Faculty of Science, Hokkaido University, N10 W8, North-ward, Sapporo, 060-0810, Japan
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37
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Mine D, Narumi T. The left-right reversed visual feedback of the hand affects multisensory interaction within peripersonal space. Atten Percept Psychophys 2024; 86:285-294. [PMID: 37759149 PMCID: PMC10769940 DOI: 10.3758/s13414-023-02788-0] [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] [Accepted: 09/07/2023] [Indexed: 09/29/2023]
Abstract
The interaction between vision and touch, known as the crossmodal congruency effect, has been extensively investigated in several research studies. Recent studies have revealed that the crossmodal congruency effect involves body representations. However, it is unclear how bodily information (e.g., location, posture, motion) is linked to visual and tactile inputs. Three experiments were conducted to investigate this issue. In Experiment 1, participants performed a crossmodal congruency task in which both their hand appearance and the motor trajectories were left-right reversed. The results showed that the crossmodal congruency effect was not observed in the reversal condition, whereas participants showed significant crossmodal congruency in the control condition, in which there was no visual manipulation of the hand. In Experiments 2 and 3, where either the hand appearance or motor trajectory was left-right reversed individually, a significant crossmodal congruency effect was observed. This study demonstrated that visual manipulation of hand appearance and motor trajectories both affected the crossmodal congruency effect, although neither showed a dominant effect that solely altered the crossmodal congruency effect. The present results provide insights into the relationship between visual-tactile interactions and bodily information.
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Affiliation(s)
- Daisuke Mine
- Graduate School of Interdisciplinary Information Studies, The University of Tokyo, Tokyo, Japan.
| | - Takuji Narumi
- Graduate School of Information Science and Technology, The University of Tokyo, Tokyo, Japan
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38
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Okubo Y. Lessons learned from the COVID-19 pandemic and future pandemic preparedness for children in Japan. Pediatr Int 2024; 66:e15732. [PMID: 38156531 DOI: 10.1111/ped.15732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 11/24/2023] [Indexed: 12/30/2023]
Affiliation(s)
- Yusuke Okubo
- Department of Social Medicine, National Center for Child Health and Development, Tokyo, Japan
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39
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Ushiba S, Nakano T, Shinagawa A, Miyakawa N, Kato T, Yofu K, Ono T, Kanai Y, Tani S, Kimura M, Matsumoto K. Biosensing with Surface-Charge-Modulated Graphene Field-Effect Transistors beyond Nonlinear Electrolytic Screening. ACS Omega 2023; 8:49270-49277. [PMID: 38162780 PMCID: PMC10753719 DOI: 10.1021/acsomega.3c07650] [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] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 11/23/2023] [Accepted: 11/29/2023] [Indexed: 01/03/2024]
Abstract
In field-effect transistor (FET) biosensors, charge screening in electrolyte solutions limits the sensitivity, thereby restricting the applicability of FET sensors. This is particularly pronounced in graphene FET (GFET) biosensors, where the bare graphene surface possesses a strongly negative charge, which impedes the high sensitivity of GFETs owing to nonlinear electrolytic screening at the interfaces between graphene and liquid. In this study, we counteracted the negative surface charge of graphene by decorating positively charged compounds and demonstrated the sensing of C-reactive protein (CRP) with surface-charge-modulated GFETs (SCM-GFETs). We integrated multiple SCM-GFETs with anti-CRP antibodies and nonfunctionalized GFETs into a chip and measured differentials to eliminate background changes to improve measurement reliability. The FET response corresponded to the fluorescence images, which visualized the specific adsorption of CRP. The estimated dissociation constant was consistent with previously reported values; this supports the conclusion that the results are attributed to specific adsorption. Conversely, the signal in GFETs without decoration was obscured by noise because of nonlinear electrolytic screening, further emphasizing the significance of surface-charge modulation. The limit of detection of the system was determined to be 2.9 nM. This value has the potential to be improved through further optimization of the surface charges to align with specific applications. Our devices effectively circumvent nonlinear electrolytic screening, opening the door for further advancements in GFET biosensor technology.
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Affiliation(s)
- Shota Ushiba
- Murata
Manufacturing Co., Ltd., 1-10-1 Higashikotari, Nagaokakyo-shi, Kyoto 617-8555, Japan
| | - Tomomi Nakano
- Murata
Manufacturing Co., Ltd., 1-10-1 Higashikotari, Nagaokakyo-shi, Kyoto 617-8555, Japan
| | - Ayumi Shinagawa
- Murata
Manufacturing Co., Ltd., 1-10-1 Higashikotari, Nagaokakyo-shi, Kyoto 617-8555, Japan
| | - Naruto Miyakawa
- Murata
Manufacturing Co., Ltd., 1-10-1 Higashikotari, Nagaokakyo-shi, Kyoto 617-8555, Japan
| | - Tadashi Kato
- Murata
Manufacturing Co., Ltd., 1-10-1 Higashikotari, Nagaokakyo-shi, Kyoto 617-8555, Japan
| | - Katsuyuki Yofu
- Murata
Manufacturing Co., Ltd., 1-10-1 Higashikotari, Nagaokakyo-shi, Kyoto 617-8555, Japan
| | - Takao Ono
- Osaka
University, Ibaraki, Osaka 567-0047, Japan
| | - Yasushi Kanai
- International
Center for Synchrotron Radiation Innovation Smart, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan
| | - Shinsuke Tani
- Murata
Manufacturing Co., Ltd., 1-10-1 Higashikotari, Nagaokakyo-shi, Kyoto 617-8555, Japan
| | - Masahiko Kimura
- Murata
Manufacturing Co., Ltd., 1-10-1 Higashikotari, Nagaokakyo-shi, Kyoto 617-8555, Japan
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Mase K, Mizuno H, Nakamichi N, Suzuki T, Kojima T, Kamiya S, Takeuchi T, Kondo C, Yamashita H, Sakaoka S, Morikami A, Tsukagoshi H. AtMYB50 regulates root cell elongation by upregulating PECTIN METHYLESTERASE INHIBITOR 8 in Arabidopsis thaliana. PLoS One 2023; 18:e0285241. [PMID: 38134185 PMCID: PMC10745173 DOI: 10.1371/journal.pone.0285241] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 12/04/2023] [Indexed: 12/24/2023] Open
Abstract
Plant root development involves multiple signal transduction pathways. Notably, phytohormones like auxin and cytokinin are well characterized for their molecular mechanisms of action. Reactive oxygen species (ROS) serve as crucial signaling molecules in controlling root development. The transcription factor, UPBEAT1 (UPB1) is responsible for maintaining ROS homeostasis at the root tip, influencing the transition from cell proliferation to differentiation. While UPB1 directly regulates peroxidase expression to control ROS homeostasis, it targets genes other than peroxidases, suggesting its involvement in root growth through non-ROS signals. Our investigation focused on the transcription factor MYB50, a direct target of UPB1, in Arabidopsis thaliana. By analyzing multiple fluorescent proteins and conducting RNA-seq and ChIP-seq, we unraveled a step in the MYB50 regulatory gene network. This analysis, in conjunction with the UPB1 regulatory network, demonstrated that MYB50 directly regulates the expression of PECTIN METHYLESTERASE INHIBITOR 8 (PMEI8). Overexpressing PMEI8, similar to the MYB50, resulted in reduced mature cell length. These findings establish MYB50 as a regulator of root growth within the UPB1 gene regulatory network. Our study presents a model involving transcriptional regulation by MYB50 in the UPB1 regulated root growth system and sheds light on cell elongation via pectin modification.
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Affiliation(s)
- Kosuke Mase
- Faculty of Agriculture, Meijo University, Nagoya, Aichi, Japan
| | - Honomi Mizuno
- Faculty of Agriculture, Meijo University, Nagoya, Aichi, Japan
| | - Norihito Nakamichi
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi, Japan
| | - Takamasa Suzuki
- Department of Biological Chemistry, College of Bioscience and Biotechnology, Chubu University, Kasugai, Aichi, Japan
| | - Takaaki Kojima
- Faculty of Agriculture, Meijo University, Nagoya, Aichi, Japan
| | - Sho Kamiya
- Faculty of Agriculture, Meijo University, Nagoya, Aichi, Japan
| | - Taiga Takeuchi
- Faculty of Agriculture, Meijo University, Nagoya, Aichi, Japan
| | - Chiko Kondo
- Faculty of Agriculture, Meijo University, Nagoya, Aichi, Japan
| | | | - Satomi Sakaoka
- Faculty of Agriculture, Meijo University, Nagoya, Aichi, Japan
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Matsuo R, Koyanagi M, Sugihara T, Shirata T, Nagata T, Inoue K, Matsuo Y, Terakita A. Functional characterization of four opsins and two G alpha subtypes co-expressed in the molluscan rhabdomeric photoreceptor. BMC Biol 2023; 21:291. [PMID: 38110917 PMCID: PMC10729476 DOI: 10.1186/s12915-023-01789-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 11/09/2023] [Indexed: 12/20/2023] Open
Abstract
BACKGROUND Rhabdomeric photoreceptors of eyes in the terrestrial slug Limax are the typical invertebrate-type but unique in that three visual opsins (Gq-coupled rhodopsin, xenopsin, Opn5A) and one retinochrome, all belonging to different groups, are co-expressed. However, molecular properties including spectral sensitivity and G protein selectivity of any of them are not determined, which prevents us from understanding an advantage of multiplicity of opsin properties in a single rhabdomeric photoreceptor. To gain insight into the functional role of the co-expression of multiple opsin species in a photoreceptor, we investigated the molecular properties of the visual opsins in the present study. RESULTS First, we found that the fourth member of visual opsins, Opn5B, is also co-expressed in the rhabdomere of the photoreceptor together with previously identified three opsins. The photoreceptors were also demonstrated to express Gq and Go alpha subunits. We then determined the spectral sensitivity of the four visual opsins using biochemical and spectroscopic methods. Gq-coupled rhodopsin and xenopsin exhibit maximum sensitivity at ~ 456 and 475 nm, respectively, and Opn5A and Opn5B exhibit maximum sensitivity at ~ 500 and 470 nm, respectively, with significant UV sensitivity. Notably, in vitro experiments revealed that Go alpha was activated by all four visual opsins, in contrast to the specific activation of Gq alpha by Gq-coupled rhodopsin, suggesting that the eye photoreceptor of Limax uses complex G protein signaling pathways. CONCLUSIONS The eye photoreceptor in Limax expresses as many as four different visual opsin species belonging to three distinct classes. The combination of opsins with different spectral sensitivities and G protein selectivities may underlie physiological properties of the ocular photoreception, such as a shift in spectral sensitivity between dark- and light-adapted states. This may be allowed by adjustment of the relative contribution of the four opsins without neural networks, enabling a simple strategy for fine-tuning of vision.
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Affiliation(s)
- Ryota Matsuo
- International College of Arts and Sciences, Fukuoka Women's University, 1-1-1 Kasumigaoka, Higashi-Ku, Fukuoka, 813-8529, Japan.
| | - Mitsumasa Koyanagi
- Department of Biology, Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi-Ku, Osaka, 558-8585, Japan
- Department of Biology and Geosciences, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-Ku, Osaka, 558-8585, Japan
- The OMU Advanced Research Institute of Natural Science and Technology, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi-Ku, Osaka, 558-8585, Japan
| | - Tomohiro Sugihara
- Department of Biology, Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi-Ku, Osaka, 558-8585, Japan
| | - Taishi Shirata
- Department of Biology and Geosciences, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-Ku, Osaka, 558-8585, Japan
| | - Takashi Nagata
- The Institute for Solid State Physics, The University of Tokyo, Kashiwa, Japan
- PRESTO, Japan Science and Technology Agency, Kawaguchi, Japan
| | - Keiichi Inoue
- The Institute for Solid State Physics, The University of Tokyo, Kashiwa, Japan
| | - Yuko Matsuo
- International College of Arts and Sciences, Fukuoka Women's University, 1-1-1 Kasumigaoka, Higashi-Ku, Fukuoka, 813-8529, Japan
| | - Akihisa Terakita
- Department of Biology, Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi-Ku, Osaka, 558-8585, Japan.
- Department of Biology and Geosciences, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-Ku, Osaka, 558-8585, Japan.
- The OMU Advanced Research Institute of Natural Science and Technology, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi-Ku, Osaka, 558-8585, Japan.
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Kusumoto T, Chubachi S, Namkoong H, Tanaka H, Lee H, Otake S, Nakagawara K, Fukushima T, Morita A, Watase M, Asakura T, Masaki K, Kamata H, Ishii M, Hasegawa N, Harada N, Ueda T, Ueda S, Ishiguro T, Arimura K, Saito F, Yoshiyama T, Nakano Y, Mutoh Y, Suzuki Y, Edahiro R, Murakami K, Sato Y, Okada Y, Koike R, Kitagawa Y, Tokunaga K, Kimura A, Imoto S, Miyano S, Ogawa S, Kanai T, Fukunaga K. Characteristics of patients with COVID-19 who have deteriorating chest X-ray findings within 48 h: a retrospective cohort study. Sci Rep 2023; 13:22054. [PMID: 38086863 PMCID: PMC10716517 DOI: 10.1038/s41598-023-49340-6] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Accepted: 12/07/2023] [Indexed: 12/18/2023] Open
Abstract
The severity of chest X-ray (CXR) findings is a prognostic factor in patients with coronavirus disease 2019 (COVID-19). We investigated the clinical and genetic characteristics and prognosis of patients with worsening CXR findings during early hospitalization. We retrospectively included 1656 consecutive Japanese patients with COVID-19 recruited through the Japan COVID-19 Task Force. Rapid deterioration of CXR findings was defined as increased pulmonary infiltrates in ≥ 50% of the lung fields within 48 h of admission. Rapid deterioration of CXR findings was an independent risk factor for death, most severe illness, tracheal intubation, and intensive care unit admission. The presence of consolidation on CXR, comorbid cardiovascular and chronic obstructive pulmonary diseases, high body temperature, and increased serum aspartate aminotransferase, potassium, and C-reactive protein levels were independent risk factors for rapid deterioration of CXR findings. Risk variant at the ABO locus (rs529565-C) was associated with rapid deterioration of CXR findings in all patients. This study revealed the clinical features, genetic features, and risk factors associated with rapid deterioration of CXR findings, a poor prognostic factor in patients with COVID-19.
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Affiliation(s)
- Tatsuya Kusumoto
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Shotaro Chubachi
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
| | - Ho Namkoong
- Department of Infectious Diseases, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
| | - Hiromu Tanaka
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Ho Lee
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Shiro Otake
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Kensuke Nakagawara
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Takahiro Fukushima
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Atsuho Morita
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Mayuko Watase
- Department of Respiratory Medicine, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Takanori Asakura
- Department of Pulmonary Medicine, Saitama City Hospital, Saitama, Japan
| | - Katsunori Masaki
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Hirofumi Kamata
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Makoto Ishii
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Naoki Hasegawa
- Department of Infectious Diseases, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Norihiro Harada
- Department of Respiratory Medicine, Juntendo University Faculty of Medicine and Graduate School of Medicine, Tokyo, Japan
| | - Tetsuya Ueda
- Department of Respiratory Medicine, Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Soichiro Ueda
- Department of Internal Medicine, Japan Community Health Care Organization (JCHO), Saitama Medical Center, Saitama, Japan
| | - Takashi Ishiguro
- Department of Respiratory Medicine, Saitama Cardiovascular and Respiratory Center, Kumagaya, Japan
| | - Ken Arimura
- Department of Respiratory Medicine, Tokyo Women's Medical University, Tokyo, Japan
| | - Fukuki Saito
- Department of Emergency and Critical Care Medicine, Kansai Medical University General Medical Center, Moriguchi, Japan
| | - Takashi Yoshiyama
- Respiratory Disease Center, Fukujuji Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - Yasushi Nakano
- Department of Internal Medicine, Kawasaki Municipal Ida Hospital, Kawasaki, Japan
| | - Yoshikazu Mutoh
- Department of Infectious Diseases, Tosei General Hospital, Seto, Japan
| | - Yusuke Suzuki
- Department of Respiratory Medicine, Kitasato University Kitasato Institute Hospital, Tokyo, Japan
| | - Ryuya Edahiro
- Department of Statistical Genetics, Osaka University Graduate School of Medicine, Suita, Japan
| | - Koji Murakami
- Department of Respiratory Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yasunori Sato
- Department of Preventive Medicine and Public Health, Keio University School of Medicine, Tokyo, Japan
| | - Yukinori Okada
- Department of Statistical Genetics, Osaka University Graduate School of Medicine, Suita, Japan
- Integrated Frontier Research for Medical Science Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Suita, Japan
- The Center for Infectious Disease Education and Research (CiDER), Osaka University, Suita, Japan
- Laboratory of Statistical Immunology, Immunology Frontier Research Center (WPI-IFReC), Osaka University, Suita, Japan
| | - Ryuji Koike
- Medical Innovation Promotion Center, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yuko Kitagawa
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Katsushi Tokunaga
- Genome Medical Science Project (Toyama), National Center for Global Health and Medicine, Tokyo, Japan
| | - Akinori Kimura
- Institute of Research, Tokyo Medical and Dental University, Tokyo, Japan
| | - Seiya Imoto
- Division of Health Medical Intelligence, Human Genome Center, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Satoru Miyano
- M&D Data Science Center, Tokyo Medical and Dental University, Tokyo, Japan
| | - Seishi Ogawa
- Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan
- Institute for the Advanced Study of Human Biology (WPI-ASHBi), Kyoto University, Kyoto, Japan
- Department of Medicine, Center for Hematology and Regenerative Medicine, Karolinska Institute, Stockholm, Sweden
| | - Takanori Kanai
- Division of Gastroenterology and Hepatology, Department of Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Koichi Fukunaga
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
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Wada Y, Maruchi T, Ishii R, Sunada Y. Visible Light Responsive Dinuclear Zinc Complex Consisting of Proximally Arranged Two d 10 -Zinc Centers. Angew Chem Int Ed Engl 2023; 62:e202310571. [PMID: 37753736 DOI: 10.1002/anie.202310571] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/19/2023] [Accepted: 09/25/2023] [Indexed: 09/28/2023]
Abstract
So far, Zn(II)-based d10 complexes have been known to be colorless unless they are accompanied by chromophoric groups, and therefore both fundamental and advanced photophysical performance of Zn centers of complexes, especially in visible-light regions has been unexplored. Here, we first demonstrate a dinuclear Zn(II) complex that shows visible light absorption using an orbital distributed over closely contacted two Zn centers experimentally determined by X-ray crystallography. A contrastive study demonstrated that intermetallic orbital interaction in dinuclear Zn(II) complex is responsible for capturing visible light to exhibit orangish yellow color, whereas an analogous one without such an interaction is colorless. This work demonstrates that introduction of Zn-Zn interactions to Zn(II) molecules contradicts the common notion that Zn is unresponsive to visible light and expands the photophysical field of zinc chemistry.
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Affiliation(s)
- Yoshimasa Wada
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, 153-8505, Tokyo, Japan
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, 153-8505, Tokyo, Japan
| | - Takahiro Maruchi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, 153-8505, Tokyo, Japan
| | - Reon Ishii
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, 153-8505, Tokyo, Japan
| | - Yusuke Sunada
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, 153-8505, Tokyo, Japan
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, 153-8505, Tokyo, Japan
- JST PRESTO, 4-1-8 Honcho, 332-0012, Kawaguchi, Saitama, Japan
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Goh T, Song Y, Yonekura T, Obushi N, Den Z, Imizu K, Tomizawa Y, Kondo Y, Miyashima S, Iwamoto Y, Inami M, Chen YW, Nakajima K. In-Depth Quantification of Cell Division and Elongation Dynamics at the Tip of Growing Arabidopsis Roots Using 4D Microscopy, AI-Assisted Image Processing and Data Sonification. Plant Cell Physiol 2023; 64:1262-1278. [PMID: 37861079 DOI: 10.1093/pcp/pcad105] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 09/05/2023] [Accepted: 09/13/2023] [Indexed: 10/21/2023]
Abstract
One of the fundamental questions in plant developmental biology is how cell proliferation and cell expansion coordinately determine organ growth and morphology. An amenable system to address this question is the Arabidopsis root tip, where cell proliferation and elongation occur in spatially separated domains, and cell morphologies can easily be observed using a confocal microscope. While past studies revealed numerous elements of root growth regulation including gene regulatory networks, hormone transport and signaling, cell mechanics and environmental perception, how cells divide and elongate under possible constraints from cell lineages and neighboring cell files has not been analyzed quantitatively. This is mainly due to the technical difficulties in capturing cell division and elongation dynamics at the tip of growing roots, as well as an extremely labor-intensive task of tracing the lineages of frequently dividing cells. Here, we developed a motion-tracking confocal microscope and an Artificial Intelligence (AI)-assisted image-processing pipeline that enables semi-automated quantification of cell division and elongation dynamics at the tip of vertically growing Arabidopsis roots. We also implemented a data sonification tool that facilitates human recognition of cell division synchrony. Using these tools, we revealed previously unnoted lineage-constrained dynamics of cell division and elongation, and their contribution to the root zonation boundaries.
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Affiliation(s)
| | - Yu Song
- College of Information Science and Engineering, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga, 525-8577 Japan
| | - Takaaki Yonekura
- Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192 Japan
- Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033 Japan
| | - Noriyasu Obushi
- Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Tokyo, 153-8904 Japan
| | - Zeping Den
- College of Information Science and Engineering, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga, 525-8577 Japan
| | - Katsutoshi Imizu
- Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192 Japan
| | - Yoko Tomizawa
- The Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi, 444-8787 Japan
| | - Yohei Kondo
- The Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi, 444-8787 Japan
| | - Shunsuke Miyashima
- Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192 Japan
| | - Yutaro Iwamoto
- College of Information Science and Engineering, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga, 525-8577 Japan
- Faculty of Information and Communication Engineering, Osaka Electro-Communication University, 18-8 Hatsucho, Neyagawa, Osaka, 572-8530 Japan
| | - Masahiko Inami
- Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Tokyo, 153-8904 Japan
- Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192 Japan
| | - Yen-Wei Chen
- College of Information Science and Engineering, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga, 525-8577 Japan
| | - Keiji Nakajima
- Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192 Japan
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Masuda K, Kuwada E, Suzuki M, Suzuki T, Niikawa T, Uchida S, Akagi T. Transcriptomic Interpretation on Explainable AI-Guided Intuition Uncovers Premonitory Reactions of Disordering Fate in Persimmon Fruit. Plant Cell Physiol 2023; 64:1323-1330. [PMID: 37225398 DOI: 10.1093/pcp/pcad050] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 05/15/2023] [Accepted: 07/06/2023] [Indexed: 05/26/2023]
Abstract
Deep neural network (DNN) techniques, as an advanced machine learning framework, have allowed various image diagnoses in plants, which often achieve better prediction performance than human experts in each specific field. Notwithstanding, in plant biology, the application of DNNs is still mostly limited to rapid and effective phenotyping. The recent development of explainable CNN frameworks has allowed visualization of the features in the prediction by a convolutional neural network (CNN), which potentially contributes to the understanding of physiological mechanisms in objective phenotypes. In this study, we propose an integration of explainable CNN and transcriptomic approach to make a physiological interpretation of a fruit internal disorder in persimmon, rapid over-softening. We constructed CNN models to accurately predict the fate to be rapid softening in persimmon cv. Soshu, only with photo images. The explainable CNNs, such as Gradient-weighted Class Activation Mapping (Grad-Class Activation Mapping (CAM)) and guided Grad-CAM, visualized specific featured regions relevant to the prediction of rapid softening, which would correspond to the premonitory symptoms in a fruit. Transcriptomic analyses to compare the featured regions of the predicted rapid-softening and control fruits suggested that rapid softening is triggered by precocious ethylene signal-dependent cell wall modification, despite exhibiting no direct phenotypic changes. Further transcriptomic comparison between the featured and non-featured regions in the predicted rapid-softening fruit suggested that premonitory symptoms reflected hypoxia and the related stress signals finally to induce ethylene signals. These results would provide a good example for the collaboration of image analysis and omics approaches in plant physiology, which uncovered a novel aspect of fruit premonitory reactions in the rapid-softening fate.
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Affiliation(s)
- Kanae Masuda
- Graduate School of Environmental and Life Science, Okayama University, 1-1-1 Tsushimanaka, Kita Ward, Okayama, 700-8530 Japan
| | - Eriko Kuwada
- Graduate School of Environmental and Life Science, Okayama University, 1-1-1 Tsushimanaka, Kita Ward, Okayama, 700-8530 Japan
| | - Maria Suzuki
- Graduate School of Environmental and Life Science, Okayama University, 1-1-1 Tsushimanaka, Kita Ward, Okayama, 700-8530 Japan
| | - Tetsuya Suzuki
- Gifu Prefectural Agricultural Technology Center, 729-1 Matamaru Gifu, 501-1152 Japan
| | - Takeshi Niikawa
- Gifu Prefectural Agricultural Technology Center, 729-1 Matamaru Gifu, 501-1152 Japan
| | - Seiichi Uchida
- Faculty of Information Science and Electrical Engineering, Kyusyu University, 744 Motooka, Nishi Ward, Fukuoka, 819-0395 Japan
| | - Takashi Akagi
- Graduate School of Environmental and Life Science, Okayama University, 1-1-1 Tsushimanaka, Kita Ward, Okayama, 700-8530 Japan
- Japan Science and Technology Agency (JST), PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012 Japan
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Kaizu K, Takahashi K. Technologies for whole-cell modeling: Genome-wide reconstruction of a cell in silico. Dev Growth Differ 2023; 65:554-564. [PMID: 37856476 DOI: 10.1111/dgd.12897] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 09/06/2023] [Accepted: 10/14/2023] [Indexed: 10/21/2023]
Abstract
With advances in high-throughput, large-scale in vivo measurement and genome modification techniques at the single-nucleotide level, there is an increasing demand for the development of new technologies for the flexible design and control of cellular systems. Computer-aided design is a powerful tool to design new cells. Whole-cell modeling aims to integrate various cellular subsystems, determine their interactions and cooperative mechanisms, and predict comprehensive cellular behaviors by computational simulations on a genome-wide scale. It has been applied to prokaryotes, yeasts, and higher eukaryotic cells, and utilized in a wide range of applications, including production of valuable substances, drug discovery, and controlled differentiation. Whole-cell modeling, consisting of several thousand elements with diverse scales and properties, requires innovative model construction, simulation, and analysis techniques. Furthermore, whole-cell modeling has been extended to multiple scales, including high-resolution modeling at the single-nucleotide and single-amino acid levels and multicellular modeling of tissues and organs. This review presents an overview of the current state of whole-cell modeling, discusses the novel computational and experimental technologies driving it, and introduces further developments toward multihierarchical modeling on a whole-genome scale.
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Affiliation(s)
- Kazunari Kaizu
- RIKEN Center for Biosystems Dynamics Research, Osaka, Japan
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Sugisaki K. Projective Measurement-Based Quantum Phase Difference Estimation Algorithm for the Direct Computation of Eigenenergy Differences on a Quantum Computer. J Chem Theory Comput 2023; 19:7617-7625. [PMID: 37874368 PMCID: PMC10653105 DOI: 10.1021/acs.jctc.3c00784] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Indexed: 10/25/2023]
Abstract
Quantum computers are capable of calculating the energy difference of two electronic states using the quantum phase difference estimation (QPDE) algorithm. The Bayesian inference-based implementations for the QPDE have been reported so far, but in this approach, the quality of the calculated energy difference depends on the input wave functions being used. Here, we report the inverse quantum Fourier transformation-based QPDE with Na of ancillary qubits, which allows us to compute the difference of eigenenergies based on the single-shot projective measurement. As proof-of-concept demonstrations, we report numerical experiments for the singlet-triplet energy difference of the hydrogen molecule and the vertical excitation energies of halogen-substituted methylenes (CHF, CHCl, CF2, CFCl, and CCl2) and formaldehyde (HCHO).
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Affiliation(s)
- Kenji Sugisaki
- Graduate
School of Science and Technology, Keio University, 7-1 Shinkawasaki, Saiwai-ku, Kawasaki, Kanagawa 212-0032, Japan
- Quantum
Computing Center, Keio University, 3-14-1 Hiyoshi,
Kohoku-ku Yokohama, Kanagawa 223-8522, Japan
- Centre
for Quantum Engineering, Research and Education
TCG Centres for Research and Education in Science and Technology, Sector V, Salt Lake, Kolkata 700091, India
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48
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Mei P, Morimoto H, Okada Y, Matsuo K, Hayashi H, Saeki A, Yamada H, Aratani N. Complexation study of a 1,3-phenylene-bridged cyclic hexa-naphthalene with fullerenes C 60 and C 70 in solution and 1D-alignment of fullerenes in the crystals. RSC Adv 2023; 13:33459-33462. [PMID: 38025867 PMCID: PMC10644901 DOI: 10.1039/d3ra06526j] [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: 09/25/2023] [Accepted: 11/07/2023] [Indexed: 12/01/2023] Open
Abstract
To investigate the host ability of a simple macrocycle, 1,3-phenylene-bridged naphthalene hexamer N6, we evaluated the complexation of N6 with fullerenes in toluene and in the crystals. The complexes in the solid-state demonstrate the one-dimensional alignment of fullerenes. The single-crystals of the C60@N6 composite have semiconductive properties revealed by photoconductivity measurements.
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Affiliation(s)
- Peifeng Mei
- Division of Materials Science, Nara Institute of Science and Technology (NAIST) 8916-5 Takayama-cho Ikoma 630-0192 Japan
| | - Hirofumi Morimoto
- Division of Materials Science, Nara Institute of Science and Technology (NAIST) 8916-5 Takayama-cho Ikoma 630-0192 Japan
| | - Yuta Okada
- Division of Materials Science, Nara Institute of Science and Technology (NAIST) 8916-5 Takayama-cho Ikoma 630-0192 Japan
| | - Kyohei Matsuo
- Division of Materials Science, Nara Institute of Science and Technology (NAIST) 8916-5 Takayama-cho Ikoma 630-0192 Japan
| | - Hironobu Hayashi
- Division of Materials Science, Nara Institute of Science and Technology (NAIST) 8916-5 Takayama-cho Ikoma 630-0192 Japan
| | - Akinori Saeki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University 2-1 Yamadaoka Suita 565-0871 Japan
| | - Hiroko Yamada
- Division of Materials Science, Nara Institute of Science and Technology (NAIST) 8916-5 Takayama-cho Ikoma 630-0192 Japan
| | - Naoki Aratani
- Division of Materials Science, Nara Institute of Science and Technology (NAIST) 8916-5 Takayama-cho Ikoma 630-0192 Japan
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49
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Kiyozumi D. Lumicrine signaling: Extracellular regulation of sperm maturation in the male reproductive tract lumen. Genes Cells 2023; 28:757-763. [PMID: 37696504 DOI: 10.1111/gtc.13066] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 08/24/2023] [Accepted: 08/27/2023] [Indexed: 09/13/2023]
Abstract
The behaviors of cells, tissues, and organs are controlled by the extracellular environment in addition to their autonomous regulatory system. Dysfunction of extracellular regulatory mechanisms affects not only the development and survival of organisms but also successful reproduction. In this review article, a novel extracellular regulatory mechanism regulating the mammalian male reproductive ability will be briefly summarized. In terrestrial vertebrates, spermatozoa generated in the testis are transported through the lumen of the male reproductive tract and become functionally mature during the transport. Recent studies with gene-modified animals are unveiling the luminal extracellular environment of the reproductive tract to function not only as the pathway of sperm transport and the site of sperm maturation but also as the channel for cellular communication to regulate sperm maturation. Of special interest is the molecular mechanism of lumicrine signaling, a transluminal secreted signal transduction in the male reproductive tract lumen as a master regulator of sperm maturation and male reproductive ability. The general significance of such transluminal signaling in the context of cell biology will also be discussed.
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Affiliation(s)
- Daiji Kiyozumi
- Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
- PRESTO, Japan Science and Technology Agency, Tokyo, Japan
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50
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Kusumoto T, Chubachi S, Namkoong H, Tanaka H, Lee H, Azekawa S, Otake S, Nakagawara K, Fukushima T, Morita A, Watase M, Sakurai K, Asakura T, Masaki K, Kamata H, Ishii M, Hasegawa N, Harada N, Ueda T, Ueda S, Ishiguro T, Arimura K, Saito F, Yoshiyama T, Nakano Y, Mutoh Y, Suzuki Y, Edahiro R, Sano H, Sato Y, Okada Y, Koike R, Kitagawa Y, Tokunaga K, Kimura A, Imoto S, Miyano S, Ogawa S, Kanai T, Fukunaga K. Association between ABO blood group/genotype and COVID-19 in a Japanese population. Ann Hematol 2023; 102:3239-3249. [PMID: 37581712 DOI: 10.1007/s00277-023-05407-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 08/07/2023] [Indexed: 08/16/2023]
Abstract
An association between coronavirus disease 2019 (COVID-19) and the ABO blood group has been reported. However, such an association has not been studied in the Japanese population on a large scale. Little is known about the association between COVID-19 and ABO genotype. This study investigated the association between COVID-19 and ABO blood group/genotype in a large Japanese population. All Japanese patients diagnosed with COVID-19 were recruited through the Japan COVID-19 Task Force between February 2020 and October 2021. We conducted a retrospective cohort study involving 1790 Japanese COVID-19 patients whose DNA was used for a genome-wide association study. We compared the ABO blood group/genotype in a healthy population (n = 611, control) and COVID-19 patients and then analyzed their associations and clinical outcomes. Blood group A was significantly more prevalent (41.6% vs. 36.8%; P = 0.038), and group O was significantly less prevalent (26.2% vs. 30.8%; P = 0.028) in the COVID-19 group than in the control group. Moreover, genotype OO was significantly less common in the COVID-19 group. Furthermore, blood group AB was identified as an independent risk factor for most severe diseases compared with blood group O [aOR (95% CI) = 1.84 (1.00-3.37)]. In ABO genotype analysis, only genotype AB was an independent risk factor for most severe diseases compared with genotype OO. Blood group O is protective, whereas group A is associated with the risk of infection. Moreover, blood group AB is associated with the risk of the "most" severe disease.
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Affiliation(s)
- Tatsuya Kusumoto
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Shotaro Chubachi
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
| | - Ho Namkoong
- Department of Infectious Diseases, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
| | - Hiromu Tanaka
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Ho Lee
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Shuhei Azekawa
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Shiro Otake
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Kensuke Nakagawara
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Takahiro Fukushima
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Atsuho Morita
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Mayuko Watase
- Department of Respiratory Medicine, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Kaori Sakurai
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Takanori Asakura
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
- Department of Respiratory Medicine, Kitasato University Kitasato Institute Hospital, Tokyo, Japan
| | - Katsunori Masaki
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Hirofumi Kamata
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Makoto Ishii
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
- Department of Respiratory Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Naoki Hasegawa
- Department of Infectious Diseases, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Norihiro Harada
- Department of Respiratory Medicine, Juntendo University Faculty of Medicine and Graduate School of Medicine, Tokyo, Japan
| | - Tetsuya Ueda
- Department of Respiratory Medicine, Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Soichiro Ueda
- Department of Internal Medicine, JCHO (Japan Community Health Care Organization) Saitama Medical Center, Saitama, Japan
| | - Takashi Ishiguro
- Department of Respiratory Medicine, Saitama Cardiovascular and Respiratory Center, Kumagaya, Japan
| | - Ken Arimura
- Department of Respiratory Medicine, Tokyo Women's Medical University, Tokyo, Japan
| | - Fukuki Saito
- Department of Emergency and Critical Care Medicine, Kansai Medical University General Medical Center, Moriguchi, Japan
| | - Takashi Yoshiyama
- Respiratory Disease Center, Fukujuji Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - Yasushi Nakano
- Department of Internal Medicine, Kawasaki Municipal Ida Hospital, Kawasaki, Japan
| | - Yoshikazu Mutoh
- Department of Infectious Diseases, Tosei General Hospital, Seto, Japan
| | - Yusuke Suzuki
- Department of Respiratory Medicine, Kitasato University Kitasato Institute Hospital, Tokyo, Japan
| | - Ryuya Edahiro
- Department of Respiratory Medicine and Clinical Immunology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Hirohito Sano
- Department of Respiratory Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yasunori Sato
- Department of Preventive Medicine and Public Health, Keio University School of Medicine, Tokyo, Japan
| | - Yukinori Okada
- Department of Statistical Genetics, Osaka University Graduate School of Medicine, Suita, Japan
- Integrated Frontier Research for Medical Science Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Suita, Japan
- The Center for Infectious Disease Education and Research (CiDER), Osaka University, Suita, Japan
- Laboratory of Statistical Immunology, Immunology Frontier Research Center (WPI-IFReC), Osaka University, Suita, Japan
- Department of Genome Informatics, Graduate School of Medicine, the University of Tokyo, Tokyo, Japan
- Laboratory for Systems Genetics, RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan
| | - Ryuji Koike
- Medical Innovation Promotion Center, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yuko Kitagawa
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Katsushi Tokunaga
- Genome Medical Science Project (Toyama), National Center for Global Health and Medicine, Tokyo, Japan
| | - Akinori Kimura
- Institute of Research, Tokyo Medical and Dental University, Tokyo, Japan
| | - Seiya Imoto
- Division of Health Medical Intelligence, Human Genome Center, the Institute of Medical Science, the University of Tokyo, Tokyo, Japan
| | - Satoru Miyano
- M&D Data Science Center, Tokyo Medical and Dental University, Tokyo, Japan
| | - Seishi Ogawa
- Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan
- Institute for the Advanced Study of Human Biology (WPI-ASHBi), Kyoto University, Kyoto, Japan
- Department of Medicine, Center for Hematology and Regenerative Medicine, Karolinska Institute, Stockholm, Sweden
| | - Takanori Kanai
- Division of Gastroenterology and Hepatology, Department of Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Koichi Fukunaga
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
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