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Tsuchiya M, Tachibana N, Hamachi I. Post-click labeling enables highly accurate single cell analyses of glucose uptake ex vivo and in vivo. Commun Biol 2024; 7:459. [PMID: 38627603 PMCID: PMC11021395 DOI: 10.1038/s42003-024-06164-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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 04/08/2024] [Indexed: 04/19/2024] Open
Abstract
Cellular glucose uptake is a key feature reflecting metabolic demand of cells in physiopathological conditions. Fluorophore-conjugated sugar derivatives are widely used for monitoring glucose transporter (GLUT) activity at the single-cell level, but have limitations in in vivo applications. Here, we develop a click chemistry-based post-labeling method for flow cytometric measurement of glucose uptake with low background adsorption. This strategy relies on GLUT-mediated uptake of azide-tagged sugars, and subsequent intracellular labeling with a cell-permeable fluorescent reagent via a copper-free click reaction. Screening a library of azide-substituted monosaccharides, we discover 6-azido-6-deoxy-D-galactose (6AzGal) as a suitable substrate of GLUTs. 6AzGal displays glucose-like physicochemical properties and reproduces in vivo dynamics similar to 18F-FDG. Combining this method with multi-parametric immunophenotyping, we demonstrate the ability to precisely resolve metabolically-activated cells with various GLUT activities in ex vivo and in vivo models. Overall, this method provides opportunities to dissect the heterogenous metabolic landscape in complex tissue environments.
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Affiliation(s)
- Masaki Tsuchiya
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
- PRESTO (Precursory Research for Embryonic Science and Technology, JST), Sanbancho, Chiyoda-ku, Tokyo, 102-0075, Japan
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
| | - Nobuhiko Tachibana
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
- PRESTO (Precursory Research for Embryonic Science and Technology, JST), Sanbancho, Chiyoda-ku, Tokyo, 102-0075, Japan
| | - Itaru Hamachi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan.
- ERATO (Exploratory Research for Advanced Technology, JST), Sanbancho, Chiyoda-ku, Tokyo, 102-0075, Japan.
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2
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Tsuchiya M, Tachibana N, Hamachi I. Flow cytometric analysis of phosphatidylcholine metabolism using organelle-selective click labeling. STAR Protoc 2023; 4:102525. [PMID: 37635353 PMCID: PMC10474069 DOI: 10.1016/j.xpro.2023.102525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/19/2023] [Accepted: 07/28/2023] [Indexed: 08/29/2023] Open
Abstract
Here, we present a protocol to analyze phosphatidylcholine (PC) metabolism in mammalian cells using organelle-selective click labeling coupled with flow cytometry (O-ClickFC). We describe steps for the metabolic incorporation of azide-choline into PC. We then detail fluorescent labeling of the azide-modified PC with organelle-targeting clickable dyes in the ER-Golgi, plasma membrane, and mitochondria, and by flow cytometry. This protocol is optimized for flow cytometric quantification of the labeled PC at the organelle level within single live cells. For complete details on the use and execution of this protocol, please refer to Tsuchiya et al. (2023).1.
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Affiliation(s)
- Masaki Tsuchiya
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan; PRESTO (Precursory Research for Embryonic Science and Technology, JST), Sanbancho, Chiyodaku, Tokyo 102-0075, Japan.
| | - Nobuhiko Tachibana
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan; PRESTO (Precursory Research for Embryonic Science and Technology, JST), Sanbancho, Chiyodaku, Tokyo 102-0075, Japan
| | - Itaru Hamachi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan; ERATO (Exploratory Research for Advanced Technology, JST), Sanbancho, Chiyodaku, Tokyo 102-0075, Japan.
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3
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Tsuchiya M, Tachibana N, Nagao K, Tamura T, Hamachi I. Organelle-selective click labeling coupled with flow cytometry allows pooled CRISPR screening of genes involved in phosphatidylcholine metabolism. Cell Metab 2023:S1550-4131(23)00050-5. [PMID: 36917984 DOI: 10.1016/j.cmet.2023.02.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 02/13/2023] [Accepted: 02/17/2023] [Indexed: 03/14/2023]
Abstract
Cellular lipid synthesis and transport are governed by intricate protein networks. Although genetic screening should contribute to deciphering the regulatory networks of lipid metabolism, technical challenges remain-especially for high-throughput readouts of lipid phenotypes. Here, we coupled organelle-selective click labeling of phosphatidylcholine (PC) with flow cytometry-based CRISPR screening technologies to convert organellar PC phenotypes into a simple fluorescence readout for genome-wide screening. This technique, named O-ClickFC, was successfully applied in genome-scale CRISPR-knockout screens to identify previously reported genes associated with PC synthesis (PCYT1A, ACACA), vesicular membrane trafficking (SEC23B, RAB5C), and non-vesicular transport (PITPNB, STARD7). Moreover, we revealed previously uncharacterized roles of FLVCR1 as a choline uptake facilitator, CHEK1 as a post-translational regulator of the PC-synthetic pathway, and CDC50A as responsible for the translocation of PC to the outside of the plasma membrane bilayer. These findings demonstrate the versatility of O-ClickFC as an unprecedented platform for genetic dissection of cellular lipid metabolism.
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Affiliation(s)
- Masaki Tsuchiya
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan; PRESTO (Precursory Research for Embryonic Science and Technology), JST, Sanbancho, Chiyodaku, Tokyo 102-0075, Japan
| | - Nobuhiko Tachibana
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan; PRESTO (Precursory Research for Embryonic Science and Technology), JST, Sanbancho, Chiyodaku, Tokyo 102-0075, Japan
| | - Kohjiro Nagao
- Department of Biophysical Chemistry, Kyoto Pharmaceutical University, 5 Misasaginakauchi-cho, Yamashina-ku, Kyoto 607-8414, Japan
| | - Tomonori Tamura
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
| | - Itaru Hamachi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan; ERATO (Exploratory Research for Advanced Technology), JST, Sanbancho, Chiyodaku, Tokyo 102-0075, Japan.
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4
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Hirano K, Tsuchiya M, Shiomi A, Takabayashi S, Suzuki M, Ishikawa Y, Kawano Y, Takabayashi Y, Nishikawa K, Nagao K, Umemoto E, Kitajima Y, Ono Y, Nonomura K, Shintaku H, Mori Y, Umeda M, Hara Y. The mechanosensitive ion channel PIEZO1 promotes satellite cell function in muscle regeneration. Life Sci Alliance 2023; 6:6/2/e202201783. [PMID: 36446523 PMCID: PMC9711862 DOI: 10.26508/lsa.202201783] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 11/08/2022] [Accepted: 11/08/2022] [Indexed: 11/30/2022] Open
Abstract
Muscle satellite cells (MuSCs), myogenic stem cells in skeletal muscles, play an essential role in muscle regeneration. After skeletal muscle injury, quiescent MuSCs are activated to enter the cell cycle and proliferate, thereby initiating regeneration; however, the mechanisms that ensure successful MuSC division, including chromosome segregation, remain unclear. Here, we show that PIEZO1, a calcium ion (Ca2+)-permeable cation channel activated by membrane tension, mediates spontaneous Ca2+ influx to control the regenerative function of MuSCs. Our genetic engineering approach in mice revealed that PIEZO1 is functionally expressed in MuSCs and that Piezo1 deletion in these cells delays myofibre regeneration after injury. These results are, at least in part, due to a mitotic defect in MuSCs. Mechanistically, this phenotype is caused by impaired PIEZO1-Rho signalling during myogenesis. Thus, we provide the first concrete evidence that PIEZO1, a bona fide mechanosensitive ion channel, promotes proliferation and regenerative functions of MuSCs through precise control of cell division.
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Affiliation(s)
- Kotaro Hirano
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan.,School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | - Masaki Tsuchiya
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan.,PRESTO, JST, Kawaguchi-shi, Saitama, Japan
| | - Akifumi Shiomi
- Microfluidics RIKEN Hakubi Research Team, RIKEN Cluster for Pioneering Research, Wako, Saitama, Japan
| | - Seiji Takabayashi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Miki Suzuki
- School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | - Yudai Ishikawa
- School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | - Yuya Kawano
- School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | - Yutaka Takabayashi
- School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | - Kaori Nishikawa
- Microfluidics RIKEN Hakubi Research Team, RIKEN Cluster for Pioneering Research, Wako, Saitama, Japan
| | - Kohjiro Nagao
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Eiji Umemoto
- School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | - Yasuo Kitajima
- Department of Immunology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Yusuke Ono
- Department of Muscle Development and Regeneration, Institute of Molecular Embryology and Genetics, Kumamoto University, Kumamoto, Japan
| | - Keiko Nonomura
- Division of Embryology, National Institute for Basic Biology, Aichi, Japan.,Department of Basic Biology, School of Life Science, SOKENDAI, Okazaki, Japan.,Department of Life Science and Technology, Tokyo Tech, Yokohama, Japan
| | - Hirofumi Shintaku
- Microfluidics RIKEN Hakubi Research Team, RIKEN Cluster for Pioneering Research, Wako, Saitama, Japan
| | - Yasuo Mori
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Masato Umeda
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Yuji Hara
- School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
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5
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Nishi Y, Murakami Y, Teshima S, Tsukano K, Otsuka M, Hirata H, Tsuchiya M, Suzuki K. Endotoxin activity and leukocytic STAT3 mRNA alterations differ according to age in lipopolysaccharide-challenged calves. Res Vet Sci 2022; 152:300-306. [DOI: 10.1016/j.rvsc.2022.08.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 08/26/2022] [Accepted: 08/27/2022] [Indexed: 11/27/2022]
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6
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Fujii H, Kitazume Y, Uozumi R, Iihara H, Takahashi M, Arai T, Yoshizawa T, Murachi Y, Sato Y, Mikami T, Hashiguchi K, Takahashi K, Fujita Y, Yamazaki T, Hosokawa Y, Morozumi I, Tsuchiya M, Yokoyama A, Hashimoto H, Yamaguchi M. 498P Association between capecitabine efficacy and proton pump inhibitors in patients with stage II-III colorectal cancer: A retrospective multicenter study. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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7
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Tsuchiya M, Tamura T, Hamachi I. Organelle-Selective Labeling of Choline-Containing Phospholipids (CPLs) and Real-Time Imaging in Living Cells. Curr Protoc 2021; 1:e105. [PMID: 33886163 DOI: 10.1002/cpz1.105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Choline-containing phospholipids (CPLs), including phosphatidylcholine (PC) and sphingomyelin (SM), are the major components of mammalian cell membranes and play critical roles during a variety of cellular processes. However, intracellular dynamics of CPLs is poorly understood due to a lack of methods to trace CPL trafficking at organelle resolution. Here, we describe protocols that make it possible to fluorescently label CPLs at the targeted organelles and to monitor their movement within living cells using confocal microscopy. © 2021 Wiley Periodicals LLC. Basic Protocol 1: ER-Golgi-selective labeling of azide-tagged CPLs for confocal imaging Basic Protocol 2: Mitochondria-selective labeling of azide-tagged CPLs for confocal imaging.
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Affiliation(s)
- Masaki Tsuchiya
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, Japan.,PRESTO (Precursory Research for Embryonic Science and Technology, JST), 4-1-8 Honcho, Kawaguchi-shi, Saitama, Japan
| | - Tomonori Tamura
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, Japan
| | - Itaru Hamachi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, Japan.,ERATO (Exploratory Research for Advanced Technology, JST), Sanbancho, Chiyodaku, Tokyo, Japan
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8
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Shiomi A, Nagao K, Yokota N, Tsuchiya M, Kato U, Juni N, Hara Y, Mori MX, Mori Y, Ui-Tei K, Murate M, Kobayashi T, Nishino Y, Miyazawa A, Yamamoto A, Suzuki R, Kaufmann S, Tanaka M, Tatsumi K, Nakabe K, Shintaku H, Yesylevsky S, Bogdanov M, Umeda M. Extreme deformability of insect cell membranes is governed by phospholipid scrambling. Cell Rep 2021; 35:109219. [PMID: 34107250 DOI: 10.1016/j.celrep.2021.109219] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 04/02/2021] [Accepted: 05/13/2021] [Indexed: 10/21/2022] Open
Abstract
Organization of dynamic cellular structure is crucial for a variety of cellular functions. In this study, we report that Drosophila and Aedes have highly elastic cell membranes with extremely low membrane tension and high resistance to mechanical stress. In contrast to other eukaryotic cells, phospholipids are symmetrically distributed between the bilayer leaflets of the insect plasma membrane, where phospholipid scramblase (XKR) that disrupts the lipid asymmetry is constitutively active. We also demonstrate that XKR-facilitated phospholipid scrambling promotes the deformability of cell membranes by regulating both actin cortex dynamics and mechanical properties of the phospholipid bilayer. Moreover, XKR-mediated construction of elastic cell membranes is essential for hemocyte circulation in the Drosophila cardiovascular system. Deformation of mammalian cells is also enhanced by the expression of Aedes XKR, and thus phospholipid scrambling may contribute to formation of highly deformable cell membranes in a variety of living eukaryotic cells.
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Affiliation(s)
- Akifumi Shiomi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Kohjiro Nagao
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan.
| | - Nobuhiro Yokota
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Masaki Tsuchiya
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Utako Kato
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Naoto Juni
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Yuji Hara
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Masayuki X Mori
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Yasuo Mori
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Kumiko Ui-Tei
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Motohide Murate
- UMR 7021 CNRS, Faculté de Pharmacie, Université de Strasbourg, 74 Route du Rhin, 67401 Illkirch, France
| | - Toshihide Kobayashi
- UMR 7021 CNRS, Faculté de Pharmacie, Université de Strasbourg, 74 Route du Rhin, 67401 Illkirch, France
| | - Yuri Nishino
- Graduate School of Life Science, University of Hyogo, Kouto, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan
| | - Atsuo Miyazawa
- Graduate School of Life Science, University of Hyogo, Kouto, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan
| | - Akihisa Yamamoto
- Center for Integrative Medicine and Physics, Institute for Advanced Study, Kyoto University, Kyoto 606-8501, Japan
| | - Ryo Suzuki
- Center for Integrative Medicine and Physics, Institute for Advanced Study, Kyoto University, Kyoto 606-8501, Japan
| | - Stefan Kaufmann
- Physical Chemistry of Biosystems, Institute of Physical Chemistry, University of Heidelberg, 69120 Heidelberg, Germany
| | - Motomu Tanaka
- Center for Integrative Medicine and Physics, Institute for Advanced Study, Kyoto University, Kyoto 606-8501, Japan; Physical Chemistry of Biosystems, Institute of Physical Chemistry, University of Heidelberg, 69120 Heidelberg, Germany
| | - Kazuya Tatsumi
- Department of Mechanical Engineering and Science, Kyoto University, Katsura, Kyoto 615-8540, Japan
| | - Kazuyoshi Nakabe
- Department of Mechanical Engineering and Science, Kyoto University, Katsura, Kyoto 615-8540, Japan
| | - Hirofumi Shintaku
- Microfluidics RIKEN Hakubi Research Team, RIKEN Cluster for Pioneering Research, Wako, Saitama 351-0198, Japan
| | - Semen Yesylevsky
- Laboratoire Chrono Environnement UMR CNRS 6249, Université de Bourgogne Franche-Comté, 16 Route de Gray, 25030 Besançon Cedex, France; Department of Physics of Biological Systems, Institute of Physics of the National Academy of Sciences of Ukraine, Prospect Nauky 46, 03680 Kyiv, Ukraine
| | - Mikhail Bogdanov
- Department of Biochemistry & Molecular Biology, University of Texas Health Science Center at Houston, McGovern Medical School, 6431 Fannin, Houston, TX 77030, USA
| | - Masato Umeda
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan.
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9
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Tsuchiya M. Imaging of electrostatic field vector distribution. Rev Sci Instrum 2021; 92:053704. [PMID: 34243291 DOI: 10.1063/5.0034052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 04/22/2021] [Indexed: 06/13/2023]
Abstract
This paper reports on the visualization of a two-dimensional distribution of electrostatic field vectors around an electrified object using the electric field imager (EFIM) device. The EFIM device is made of a virtually connected pair of plate electrodes in parallel and in proximity, between which an electronic circuit for detection and optical indication is embedded. The EFIM device is not only accurately sensitive to the electrostatic field but also possessed of agility and mobility together with directivity and noninvasiveness. It was successfully demonstrated that electrostatic field vectors were visualized quantitatively, and their spatial distributions were mapped in combination with rather simple, mobile, and low-cost equipment. The advantages and disadvantages of the EFIM visualization scheme are discussed together with the future prospect of the EFIM device.
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Affiliation(s)
- M Tsuchiya
- National Institute of Information and Communications Technology, 4-2-1 Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan
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10
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Tamura T, Fujisawa A, Tsuchiya M, Shen Y, Nagao K, Kawano S, Tamura Y, Endo T, Umeda M, Hamachi I. Organelle membrane-specific chemical labeling and dynamic imaging in living cells. Nat Chem Biol 2020; 16:1361-1367. [PMID: 32958953 DOI: 10.1038/s41589-020-00651-z] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 08/14/2020] [Indexed: 12/22/2022]
Abstract
Lipids play crucial roles as structural elements, signaling molecules and material transporters in cells. However, the functions and dynamics of lipids within cells remain unclear because of a lack of methods to selectively label lipids in specific organelles and trace their movement by live-cell imaging. We describe here a technology for the selective labeling and fluorescence imaging (microscopic or nanoscopic) of phosphatidylcholine in target organelles. This approach involves the metabolic incorporation of azido-choline, followed by a spatially limited bioorthogonal reaction that enables the visualization and quantitative analysis of interorganelle lipid transport in live cells. More importantly, with live-cell imaging, we obtained direct evidence that the autophagosomal membrane originates from the endoplasmic reticulum. This method is simple and robust and is thus powerful for real-time tracing of interorganelle lipid trafficking.
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Affiliation(s)
- Tomonori Tamura
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
- JST-ERATO, Hamachi Innovative Molecular Technology for Neuroscience, Kyoto, Japan
| | - Alma Fujisawa
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
- JST-ERATO, Hamachi Innovative Molecular Technology for Neuroscience, Kyoto, Japan
| | - Masaki Tsuchiya
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
- JST-ERATO, Hamachi Innovative Molecular Technology for Neuroscience, Kyoto, Japan
| | - Yuying Shen
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Kohjiro Nagao
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Shin Kawano
- Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, Japan
- Institute for Protein Dynamics, Kyoto Sangyo University, Kyoto, Japan
| | - Yasushi Tamura
- Faculty of Science, Yamagata University, Yamagata, Japan
| | - Toshiya Endo
- Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, Japan
- Institute for Protein Dynamics, Kyoto Sangyo University, Kyoto, Japan
| | - Masato Umeda
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Itaru Hamachi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan.
- JST-ERATO, Hamachi Innovative Molecular Technology for Neuroscience, Kyoto, Japan.
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11
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Tsuchiya M, Nagasaka Y, Sakaguchi C, Ishida M, Suzumoto J. POSTURAL CHANGES OF FINE CRACKLES IN PATIENTS WITH INTERSTITIAL PNEUMONIA. Chest 2020. [DOI: 10.1016/j.chest.2020.05.193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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12
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Miyagawa Y, Kikuchi K, Tsuchiya M, Adachi S. A statistical model for activation of Factor C by binding to LPS aggregates. Eur Biophys J 2019; 48:743-747. [PMID: 31630219 DOI: 10.1007/s00249-019-01400-4] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 09/26/2019] [Indexed: 06/10/2023]
Abstract
Published data on Factor C activity at various LPS and Lipid A concentrations (Nakamura et al. in Eur J Biochem 176:89, 1988; Kobayashi et al. in J Biol Chem 37:25987, 2014) were rearranged to show that Factor C exhibited its maximum activity at a specific concentration of LPS. A statistical model was proposed for examining whether a single LPS molecule binding activates Factor C (monomeric activation) or dimerization of Factor C is necessary for the activation (dimeric activation). In the monomeric activation model the plots of the relative activity of Factor C against the molar ratio of LPS to Factor C were different from those in the published data. The plots in the dimeric activation model lie on a bell-shaped curve, whatever the Factor C concentration, matching the published data and indicating the appropriateness of that model. We suggest that Factor C is activated by multiple molecular interactions of Factor C with LPS aggregates on which it dimerises and that this explains why larger aggregates are less effective at activating Factor C than smaller ones.
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Affiliation(s)
- Y Miyagawa
- Faculty of Bioenvironmental Science, Kyoto Gakuen University, 1-1 Nanjo-Ohtani, Sogabe-cho, Kameoka, Kyoto, 621-8555, Japan
| | - K Kikuchi
- Faculty of Liberal Studies, National Institute of Technology Kumamoto College, 2659-2 Suya, Koshi, Kumamoto, 861-1102, Japan
| | - M Tsuchiya
- Microbial Solutions, Charles River, 1023 Wappoo Road, Suite 43B, Charleston, SC, 29407, USA
| | - S Adachi
- Faculty of Bioenvironmental Science, Kyoto Gakuen University, 1-1 Nanjo-Ohtani, Sogabe-cho, Kameoka, Kyoto, 621-8555, Japan.
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13
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Tsuchiya M, Hara Y, Okuda M, Itoh K, Nishioka R, Shiomi A, Nagao K, Mori M, Mori Y, Ikenouchi J, Suzuki R, Tanaka M, Ohwada T, Aoki J, Kanagawa M, Toda T, Nagata Y, Matsuda R, Takayama Y, Tominaga M, Umeda M. Cell surface flip-flop of phosphatidylserine is critical for PIEZO1-mediated myotube formation. Nat Commun 2018; 9:2049. [PMID: 29799007 PMCID: PMC5967302 DOI: 10.1038/s41467-018-04436-w] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 04/26/2018] [Indexed: 11/23/2022] Open
Abstract
Myotube formation by fusion of myoblasts and subsequent elongation of the syncytia is essential for skeletal muscle formation. However, molecules that regulate myotube formation remain elusive. Here we identify PIEZO1, a mechanosensitive Ca2+ channel, as a key regulator of myotube formation. During myotube formation, phosphatidylserine, a phospholipid that resides in the inner leaflet of the plasma membrane, is transiently exposed to cell surface and promotes myoblast fusion. We show that cell surface phosphatidylserine inhibits PIEZO1 and that the inward translocation of phosphatidylserine, which is driven by the phospholipid flippase complex of ATP11A and CDC50A, is required for PIEZO1 activation. PIEZO1-mediated Ca2+ influx promotes RhoA/ROCK-mediated actomyosin assemblies at the lateral cortex of myotubes, thus preventing uncontrolled fusion of myotubes and leading to polarized elongation during myotube formation. These results suggest that cell surface flip-flop of phosphatidylserine acts as a molecular switch for PIEZO1 activation that governs proper morphogenesis during myotube formation. Myotube formation by fusion of myoblasts is essential for skeletal muscle formation, but which molecules regulate this process remains elusive. Here authors identify the mechanosensitive PIEZO1 channel as a key element, whose activity is regulated by phosphatidylserine during myotube formation.
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Affiliation(s)
- Masaki Tsuchiya
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan
| | - Yuji Hara
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan. .,AMED-PRIME, Japan Agency for Medical Research and Development, Tokyo, 100-0004, Japan.
| | - Masaki Okuda
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan
| | - Karin Itoh
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan
| | - Ryotaro Nishioka
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan
| | - Akifumi Shiomi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan
| | - Kohjiro Nagao
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan
| | - Masayuki Mori
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan
| | - Yasuo Mori
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan
| | - Junichi Ikenouchi
- Department of Biology, Faculty of Sciences, Kyushu University, Fukuoka, 819-0395, Japan
| | - Ryo Suzuki
- Institute for Integrated Cell-Material Sciences (WPI iCeMS), Kyoto University, Kyoto, 606-8501, Japan.,Center for Integrative Medicine and Physics, Institute for Advanced Study, Kyoto University, Kyoto, 606-8501, Japan
| | - Motomu Tanaka
- Institute for Integrated Cell-Material Sciences (WPI iCeMS), Kyoto University, Kyoto, 606-8501, Japan.,Physical Chemistry of Biosystems, Institute of Physical Chemistry, University of Heidelberg, Heidelberg, 69120, Germany.,Center for Integrative Medicine and Physics, Institute for Advanced Study, Kyoto University, Kyoto, 606-8501, Japan
| | - Tomohiko Ohwada
- Laboratory of Organic and Medicinal Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, 115-0033, Japan
| | - Junken Aoki
- Department of Molecular and Cellular Biochemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Miyagi, 980-8578, Japan
| | - Motoi Kanagawa
- Division of Neurology/Molecular Brain Science, Kobe University Graduate School of Medicine, Hyogo, 650-0017, Japan
| | - Tatsushi Toda
- Department of Neurology, Division of Neuroscience, Graduate School of Medicine, The University of Tokyo, Tokyo, 113-8655, Japan
| | - Yosuke Nagata
- Department of Life Science, Faculty of Science, Okayama University of Science, Okayama, 700-0005, Japan
| | - Ryoichi Matsuda
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, 153-8902, Japan
| | - Yasunori Takayama
- Division of Cell Signaling, Okazaki Institute for Integrative Bioscience, Aichi, 444-8787, Japan
| | - Makoto Tominaga
- Division of Cell Signaling, Okazaki Institute for Integrative Bioscience, Aichi, 444-8787, Japan
| | - Masato Umeda
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan.
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Shindo K, Sato T, Satake A, Kurita N, Tsuchiya M, Ichinose Y, Hata T, Koh K, Yamashiro N, Kobayashi F, Nagasaka T, Takiyama Y. Skin vasomotor regulation in patients with multiple system atrophy. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Nagasaka T, Hata T, Ichinose Y, Kho K, Yamashiro N, Tsuchiya M, Takaki R, Shindo K, Takiyama Y. Morphological features of mitochondria in anti-mitochondrial antibodies-positive myositis. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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16
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Matsumoto Y, Shakespear N, Tsuchiya M, Kaneko C, Kubo J, Ogawa R, Kaneko K, Takahashi T, Yamamoto T, Fujihara K. Myelin olygodendorocyte glycoprotein-antybody-associated neurologic disease – an adult case series at a Fukushima Hospital. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Ajimizu H, Ozasa H, Sato S, Sakamori Y, Funazo T, Yasuda Y, Nomizo T, Tsuji T, Yoshida H, Yagi Y, Nagai H, Sato A, Tsuchiya M, Muro S, Nagasaka Y, Mishima M, Kim Y. Survival impact of treatment for chronic obstructive pulmonary disease in patients with advanced non-small cell lung cancer. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw384.20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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18
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Hamada T, Tsuchiya M, Mizutani K, Takahashi R, Muguruma K, Maeda K, Ueda W, Nishikawa K. Levobupivacaine-dextran mixture for transversus abdominis plane block and rectus sheath block in patients undergoing laparoscopic colectomy: a randomised controlled trial. Anaesthesia 2016; 71:411-6. [PMID: 26919568 DOI: 10.1111/anae.13408] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/18/2016] [Indexed: 11/29/2022]
Abstract
We performed a randomised controlled double-blinded study of patients having laparoscopic colectomy with bilateral transversus abdominis plane block plus rectus sheath block, comparing a control group receiving 80 ml levobupivacaine 0.2% in saline with a dextran group receiving 80 ml levobupivacaine 0.2% in 8% low-molecular weight dextran. Twenty-seven patients were studied in each group. The mean (SD) maximum plasma concentration of levobupivacaine in the control group (1410 (322) ng.ml(-1) ) was higher than the dextran group (1141 (287) ng.ml(-1) ; p = 0.004), and was reached more quickly (50.6 (30.2) min vs 73.2 (24.6) min; p = 0.006). The area under the plasma concentration-time curve from 0 min to 240 min in the control group (229,124 (87,254) ng.min.ml(-1) ) was larger than in the dextran group (172,484 (50,502) ng.min.ml(-1) ; p = 0.007). The median (IQR [range]) of the summated numerical pain rating score at rest during the first postoperative 24 h in the control group (16 (9-20 [3-31]) was higher than in the dextran group (8 (2-11 [0-18]); p = 0.0001). In this study, adding dextran to levobupivacaine decreased the risk of levobupivacaine toxicity while providing better analgesia.
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Affiliation(s)
- T Hamada
- Department of Anesthesiology, Osaka City University Medical School, Osaka, Japan
| | - M Tsuchiya
- Department of Anesthesiology, Osaka City University Medical School, Osaka, Japan
| | - K Mizutani
- Operating Theatre, Osaka Rosai Hospital, Sakai, Japan
| | - R Takahashi
- Department of Anesthesia, First Towakai Hospital, Osaka, Japan
| | - K Muguruma
- Department of Surgical Oncology, Osaka City University Medical School, Osaka, Japan
| | - K Maeda
- Department of Surgical Oncology, Osaka City University Medical School, Osaka, Japan
| | - W Ueda
- Department of Anesthesiology and Intensive Care Medicine, Kochi Medical School, Kochi, Japan
| | - K Nishikawa
- Department of Anesthesiology, Osaka City University Medical School, Osaka, Japan
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Niwa T, Watanabe T, Suzuki K, Hayashi H, Ohta H, Nakayama A, Tsuchiya M, Yasuda K, Murakami N, Itoh Y. Early optimization of antimicrobial therapy improves clinical outcomes of patients administered agents targeting methicillin-resistant Staphylococcus aureus. J Clin Pharm Ther 2015; 41:19-25. [PMID: 26678686 DOI: 10.1111/jcpt.12341] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 11/15/2015] [Indexed: 12/01/2022]
Abstract
WHAT IS KNOWN AND OBJECTIVE Antimicrobial stewardship is required to ensure the appropriate use of antimicrobials. However, no reports have been published on clinical outcomes of implementation of antimicrobial stewardship in patients receiving pathogen-specific antibiotics. METHOD To evaluate the clinical outcomes of patients who received drugs, we conducted a single-centre, retrospective study of the effects of an antimicrobial stewardship programme targeting methicillin-resistant Staphylococcus aureus (MRSA). RESULTS The time to administer effective antimicrobials was significantly (median number of days, 3 before vs. 0 after, P < 0·001) shortened, and the rate of de-escalation was significantly elevated (47·1% vs. 96·2%, P < 0·001) after implementation of daily review. The 60-day clinical failure associated with Gram-positive bacterial infection was significantly reduced (33·3% vs. 17·6%, P = 0·007) after intervention. WHAT IS NEW AND CONCLUSIONS Daily review of administration of antimicrobials targeting MRSA was highly effective in improving clinical outcomes by optimizing early antimicrobial therapy.
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Affiliation(s)
- T Niwa
- Department of Pharmacy, Gifu University Hospital, Gifu, Japan.,Center for Nutrition Support & Infection Control, Gifu University Hospital, Gifu, Japan
| | - T Watanabe
- Center for Nutrition Support & Infection Control, Gifu University Hospital, Gifu, Japan
| | - K Suzuki
- Department of Pharmacy, Gifu University Hospital, Gifu, Japan
| | - H Hayashi
- Department of Pharmacy, Gifu University Hospital, Gifu, Japan
| | - H Ohta
- Center for Nutrition Support & Infection Control, Gifu University Hospital, Gifu, Japan
| | - A Nakayama
- Center for Nutrition Support & Infection Control, Gifu University Hospital, Gifu, Japan
| | - M Tsuchiya
- Center for Nutrition Support & Infection Control, Gifu University Hospital, Gifu, Japan
| | - K Yasuda
- Department of Pharmacy, Gifu University Hospital, Gifu, Japan
| | - N Murakami
- Center for Nutrition Support & Infection Control, Gifu University Hospital, Gifu, Japan
| | - Y Itoh
- Department of Pharmacy, Gifu University Hospital, Gifu, Japan
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20
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Yusup A, Kaneko H, Liu L, Ning L, Sadatsuki R, Hada S, Kamagata K, Kinoshita M, Futami I, Shimura Y, Tsuchiya M, Saita Y, Takazawa Y, Ikeda H, Aoki S, Kaneko K, Ishijima M. Bone marrow lesions, subchondral bone cysts and subchondral bone attrition are associated with histological synovitis in patients with end-stage knee osteoarthritis: a cross-sectional study. Osteoarthritis Cartilage 2015; 23:1858-64. [PMID: 26028139 DOI: 10.1016/j.joca.2015.05.017] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 05/16/2015] [Accepted: 05/20/2015] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The aim of this study was to examine the osteoarthritis (OA)-related structural changes associated with histological synovitis in end-stage knee OA patients. METHODS Forty end-stage knee OA patients (female: 88%, mean age: 71.8 y) were enrolled. All participants underwent 3.0-T MRI. The structural changes, such as cartilage morphology, subchondral bone marrow lesion (BML), subchondral bone cyst (SBC), subchondral bone attrition (SBA), osteophytes, meniscal lesion and synovitis, were scored using the whole-organ MRI scoring (WORMS) method. Synovial samples were obtained from five regions of interest (ROIs) of the knee joint during total joint replacement surgery. The associations between the histological synovitis score (HSS) and WORMS or the synovial expression levels of cyclooxygenase (COX)-2, interleukin (IL)-1β, IL-6 and transforming growth factor (TGF)-β were examined using Spearman's correlation coefficient. RESULTS Among the seven OA-related structural changes, the BML, SBC, SBA and synovitis were significantly associated with the HSS (r = 0.33, 0.35, 0.48 and 0.36, respectively), while other morphological changes were not. Although synovial COX-2, IL-1β or IL-6 expression levels were not associated with the HSS, the synovial TGF-β expression levels were associated with the HSS. CONCLUSION The presence of BML, SBC and SBA was associated with histological synovitis in end-stage knee OA patients.
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Affiliation(s)
- A Yusup
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan; Research Institute for Diseases of Old Age, Juntendo University Graduate School of Medicine, Tokyo, Japan.
| | - H Kaneko
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan.
| | - L Liu
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan; Sportology Center, Juntendo University Graduate School of Medicine, Tokyo, Japan.
| | - L Ning
- Research Institute for Diseases of Old Age, Juntendo University Graduate School of Medicine, Tokyo, Japan.
| | - R Sadatsuki
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan.
| | - S Hada
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan.
| | - K Kamagata
- Department of Radiology, Juntendo University Graduate School of Medicine, Tokyo, Japan.
| | - M Kinoshita
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan.
| | - I Futami
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan.
| | - Y Shimura
- Department of Orthopedics, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan.
| | - M Tsuchiya
- Department of Orthopedics, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan.
| | - Y Saita
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan.
| | - Y Takazawa
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan.
| | - H Ikeda
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan.
| | - S Aoki
- Department of Radiology, Juntendo University Graduate School of Medicine, Tokyo, Japan.
| | - K Kaneko
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan; Sportology Center, Juntendo University Graduate School of Medicine, Tokyo, Japan; Department of Pathophysiology for Locomotive and Neoplastic Diseases, Juntendo University Graduate School of Medicine, Tokyo, Japan.
| | - M Ishijima
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan; Sportology Center, Juntendo University Graduate School of Medicine, Tokyo, Japan; Department of Pathophysiology for Locomotive and Neoplastic Diseases, Juntendo University Graduate School of Medicine, Tokyo, Japan.
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21
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Nemoto E, Sakisaka Y, Tsuchiya M, Tamura M, Nakamura T, Kanaya S, Shimonishi M, Shimauchi H. Wnt3a signaling induces murine dental follicle cells to differentiate into cementoblastic/osteoblastic cells via an osterix-dependent pathway. J Periodontal Res 2015; 51:164-74. [PMID: 26095156 DOI: 10.1111/jre.12294] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2015] [Indexed: 11/30/2022]
Abstract
BACKGROUND AND OBJECTIVE Dental follicle cells, putative progenitor cells for cementoblasts, osteoblasts and periodontal ligament cells, interplay with Hertwig's epithelial root sheath (HERS) cells during tooth root formation, in which HERS is considered to have an inductive role in initiating cementogenesis by epithelial-mesenchymal interaction. However, the specific mechanisms controlling the cementoblast/osteoblast differentiation of dental follicle cells are not fully understood. Canonical Wnt signaling has been implicated in increased bone formation by controlling mesenchymal stem cell or osteoblastic cell functions. This study examined the possible expression of canonical Wnt ligand in HERS and the role of Wnt signaling during the cementoblast/osteoblast differentiation of dental follicle cells. MATERIAL AND METHODS The expression of Wnt3a, a representative canonical Wnt ligand, in HERS was assessed by immunohistochemistry. The differentiation and function of immortalized murine dental follicle cells were evaluated by measuring alkaline phosphatase (ALP, Alpl) activity and osteogenic gene expression. RESULTS We identified the expression of Wnt3a in HERS during mouse tooth root development by immunohistochemistry as well as in cultured human epithelial rest cells of Malassez by real-time polymerase chain reaction, while no expression of Wnt3a was detected in cultured dental mesenchymal cells. Exposure of immortalized murine dental follicle cells to Wnt3a-induced ALP activity as well as expression of the Alpl gene. Pretreatment of cells with Dickkopf-1, a potent canonical Wnt antagonist, markedly attenuated the effect of Wnt3a on ALP expression. Furthermore, Wnt3a induced transcriptional activity of runt-related transcription factor 2 (Runx2) and expression of osterix at gene and/or protein levels. Treatment with osterix-small interfering RNA significantly inhibited Wnt3a-induced ALP expression at gene and protein levels. CONCLUSION These findings suggest that HERS has a potential role in stimulating cementoblast/osteoblast differentiation of dental follicle cells via the Wnt/β-catenin signaling pathway.
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Affiliation(s)
- E Nemoto
- Department of Periodontology and Endodontology, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Y Sakisaka
- Department of Periodontology and Endodontology, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - M Tsuchiya
- Department of Oral Diagnosis, Tohoku University Graduate School of Dentistry, Sendai, Japan.,Tohoku Fukushi University, Sendai, Japan
| | - M Tamura
- Department of Biochemistry and Molecular Biology, Hokkaido University Graduate School of Dentistry, Sapporo, Japan
| | - T Nakamura
- Department of Pediatric Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan.,Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - S Kanaya
- Department of Periodontology and Endodontology, Tohoku University Graduate School of Dentistry, Sendai, Japan.,Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - M Shimonishi
- Department of Comprehensive Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - H Shimauchi
- Department of Periodontology and Endodontology, Tohoku University Graduate School of Dentistry, Sendai, Japan
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Shoji N, Kaneta N, Satoh-Kuriwada S, Tsuchiya M, Hashimoto N, Uneyama H, Kawai M, Sasano T. Expression of umami-taste-related genes in the tongue: a pilot study for genetic taste diagnosis. Oral Dis 2015; 21:801-6. [PMID: 25990784 DOI: 10.1111/odi.12350] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Revised: 05/01/2015] [Accepted: 05/08/2015] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Expression of taste-related genes in the tongue was analysed to develop a technique for genetic diagnosis of umami taste disorders. MATERIALS AND METHODS Tissue samples were collected from healthy volunteers by scraping the foliate papillae of the tongue. Immunocytochemistry staining of gustducin, a taste-cell-specific G protein, and gene expression analysis by real-time polymerase chain reaction of β-actin, gustducin (GNAT3) and umami receptors (T1R1, T1R3 and mGluR1) were performed. Changes in umami receptor expression following application of umami substances onto the tongue were analysed. RESULTS Gustducin-positive cells were observed in the samples, indicating the presence of taste cells. Gene expression of β-actin, GNAT3, T1R1 and T1R3 was detected in all seven samples tested, while that of mGluR1 was detected in four samples. Sequence analysis by NCBI Blast showed that each polymerase chain reaction product had a 99% rate of identification of its target sequence. Stimulation of the tongue with monosodium glutamate significantly upregulated the gene expression levels of T1R1 and T1R3, indicating that this method can detect alterations in umami-related gene expression. CONCLUSION Evaluation of the expression of the umami receptor genes, T1R1 and T1R3, in the tongue may be clinically useful for objective genetic diagnosis of umami taste disorders.
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Affiliation(s)
- N Shoji
- Division of Oral Diagnosis, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - N Kaneta
- Division of Oral Diagnosis, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - S Satoh-Kuriwada
- Division of Oral Diagnosis, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - M Tsuchiya
- Division of Oral Diagnosis, Tohoku University Graduate School of Dentistry, Sendai, Japan.,Tohoku Fukushi University, Sendai, Japan
| | - N Hashimoto
- Division of Oral Diagnosis, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - H Uneyama
- Institute for Innovation, Ajinomoto Company Inc., Kawasaki, Tokyo, Japan
| | - M Kawai
- Institute for Innovation, Ajinomoto Company Inc., Kawasaki, Tokyo, Japan
| | - T Sasano
- Division of Oral Diagnosis, Tohoku University Graduate School of Dentistry, Sendai, Japan
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Hanada S, Zaitsu Y, Tsuchiya M, Miyamoto H, Nishiura R, Nakatsuru K. A new, convenient muscle strength method for evaluating the ability of patients with cardiopulmonary disease to stand up. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.3324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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24
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Oda M, Azuma T, Watanabe N, Nishizaki Y, Nishida J, Ishii K, Suzuki H, Kaneko H, Komatsu H, Tsukada N, Tsuchiya M. Regulatory Mechanism of Hepatic Microcirculation: Involvement of the Contraction and Dilatation of Sinusoids and Sinusoidal Endothelial Fenestrae1. Progress in Applied Microcirculation 2015. [DOI: 10.1159/000418654] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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25
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Sakamoto Y, Bidinosti CP, Ichikawa Y, Sato T, Ohtomo Y, Kojima S, Funayama C, Suzuki T, Tsuchiya M, Furukawa T, Yoshimi A, Ino T, Ueno H, Matsuo Y, Fukuyama T, Asahi K. Development of high-homogeneity magnetic field coil for 129Xe EDM experiment. ACTA ACUST UNITED AC 2015. [DOI: 10.1007/s10751-014-1109-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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26
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Tsuchiya M, Nakajima Y, Waku T, Hiyoshi H, Morishita T, Furumai R, Hayashi Y, Kishimoto H, Kimura K, Yanagisawa J. CHIP buffers heterogeneous Bcl-2 expression levels to prevent augmentation of anticancer drug-resistant cell population. Oncogene 2014; 34:4656-63. [DOI: 10.1038/onc.2014.387] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 09/25/2014] [Accepted: 10/14/2014] [Indexed: 01/12/2023]
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27
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Ohtani K, Tsuchiya M, Sugiyama H, Katakura T, Hayakawa M, Kanai T. Surface treatment of flow channels in microfluidic devices fabricated by stereolithography. J Oleo Sci 2014; 63:93-6. [PMID: 24389798 DOI: 10.5650/jos.ess13132] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
A microfluidic device with three-dimensional flow channels was fabricated by stereolithography, and hydrophilic surface treatment of the flow channel was performed by coating the wall of the channel with a silica layer. After the treatment, the device produced monodisperse oil-in-water (O/W) emulsions. The silica layer on the channel surface was then coated with a fluorinated silane coupling agent to make it hydrophobic, thus enabling the treated device to produce monodisperse inverted water-in-oil (W/O) emulsions.
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Affiliation(s)
- Kanako Ohtani
- Department of Materials Science and Engineering, Yokohama National University
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28
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Suehiro K, Tanaka K, Matsuura T, Funao T, Yamada T, Mori T, Tsuchiya M, Nishikawa K. Preoperative hydroperoxide concentrations are associated with a risk of postoperative complications after cardiac surgery. Anaesth Intensive Care 2014; 42:487-94. [PMID: 24967764 DOI: 10.1177/0310057x1404200410] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
This study aimed to assess whether preoperative oxidative stress levels can predict postoperative complications in patients undergoing cardiac surgery. Ninety-five cardiac surgery patients received an assessment of preoperative oxidative stress by measurement of hydroperoxide values in blood via the d-Rom test. Area under the receiver operating characteristic curve and also multivariate logistic regression were used to evaluate the prognostic significance of preoperative hydroperoxide concentrations in predicting the occurrence of major organ morbidity and mortality (MOMM). MOMM included death, deep sternal infection, reoperation, stroke, renal failure requiring haemodialysis and prolonged ventilation (>48 hours). The ability of preoperative hydroperoxide concentrations to predict MOMM was not significantly different from that of the European system for cardiac operative risk evaluation (EuroSCORE) (area under the receiver operating characteristic curve 0.822 versus 0.821 respectively, P=0.983). The optimal threshold value of hydroperoxide concentration to differentiate between patients with and without MOMM was 450 UCarr (sensitivity, 87.0%; specificity, 81.9%). Duration of intensive care unit stay, mechanical ventilation time and hospital stay were significantly longer in patients with preoperative hydroperoxide concentrations ≥450 UCarr (H group) compared to those patients with preoperative hydroperoxide concentrations <450 UCarr (L group). An increase in preoperative hydroperoxide concentrations remained associated with an increased risk of MOMM (odds ratios: 1.01, 95% confidence interval: 1.00 to 1.03) and prolonged intensive care unit stay (odds ratio 1.01, 95% confidence interval: 1.00 to 1.02), after adjusting for age, gender and EuroSCORE. In conclusion, an increased hydroperoxide concentration before cardiac surgery is an independent risk factor for severe postoperative complications.
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Affiliation(s)
- K Suehiro
- Department of Anaesthesiology, Osaka City University Graduate School of Medicine, Osaka, Japan
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Washizawa N, Oshima Y, Ito M, Suzuki T, Yajima S, Yajima T, Tsuchiya M, Shimada H, Kaneko H. LB032-SUN: Correlation of DXA and BIA in Lean Body Mass Measurement in Stomach Cancer Patients Before Operations. Clin Nutr 2014. [DOI: 10.1016/s0261-5614(14)50658-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Hikota E, Chikamori M, Ichikawa Y, Ohtomo Y, Sakamoto Y, Suzuki T, Bidinosti C, Inoue T, Furukawa T, Yoshimi A, Suzuki K, Nanao T, Miyatake H, Tsuchiya M, Yoshida N, Shirai H, Ino T, Ueno H, Matsuo Y, Fukuyama T, Asahi K. Active nuclear spin maser oscillation with double cell. EPJ Web of Conferences 2014. [DOI: 10.1051/epjconf/20146605005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ichikawa Y, Chikamori M, Ohtomo Y, Hikota E, Sakamoto Y, Suzuki T, Bidinosti C, Inoue T, Furukawa T, Yoshimi A, Suzuki K, Nanao T, Miyatake H, Tsuchiya M, Yoshida N, Shirai H, Ino T, Ueno H, Matsuo Y, Fukuyama T, Asahi K. Search for electric dipole moment in 129Xe atom using active nuclear spin maser. EPJ Web of Conferences 2014. [DOI: 10.1051/epjconf/20146605007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Tsuchiya M, Kyoh Y, Mizutani K, Yamashita J, Hamada T. Ultrasound-guided single shot caudal block anesthesia reduces postoperative urinary catheter-induced discomfort. Minerva Anestesiol 2013; 79:1381-1388. [PMID: 23811624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND Urinary catheter-induced discomfort during the postoperative period can be distressing, and sometimes results in severe restlessness and agitation, especially in middle-aged and elderly male patients. Recent advances in ultrasound technology have increased the consistency, safety, and ease of a caudal block even in older patients. We speculated that an ultrasound-guided caudal block would be reliable and safe as treatment for such postoperative discomfort. METHODS Adult male patients (ASA I-II) undergoing cervical laminoplasty were allocated to either the caudal block (CB, N.=24) or non-block (NB, N.=24) group. Following anesthesia induction, urinary catheterization was performed using a 16 French Foley catheter. Thereafter, an ultrasound-guided caudal block was performed with 8 ml of 0.3% ropivacaine and 100 µg of fentanyl for patients in group CB, while group NB did not receive a caudal block. We assessed urinary catheter-induced discomfort as mild, moderate, or severe at 0, 2, 6, 10, and 18 hours after surgery, and compared the incidence and severity of discomfort between the groups using a randomized double-blind design. RESULTS All caudal blocks were successfully performed with 1 or 2 needle insertions. The incidence of urinary catheter-induced discomfort was significantly reduced in group CB as compared to NB at 0, 2, and 6 hours, while severity was also reduced at 0 and 2 hours. No patient required re-catheterization due to urinary retention after catheter removal. There were no other complications related to the caudal block. CONCLUSION Preoperative ultrasound-guided single shot caudal block anesthesia safely reduced postoperative urinary catheter-induced discomfort in our male patients.
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Tsuchiya M, Kyoh Y. Key points for intraoperative management of percutaneous endoscopic lumbar discectomy (PELD) for anesthesiologists. Minerva Anestesiol 2013; 79:1318-1319. [PMID: 23652176] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Affiliation(s)
- M Tsuchiya
- Department of Anesthesiology, Osaka City University Medical School, Abeno-Ku, Osaka, Japan -
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Shimura Y, Kurosawa H, Sugawara Y, Tsuchiya M, Sawa M, Kaneko H, Futami I, Liu L, Sadatsuki R, Hada S, Iwase Y, Kaneko K, Ishijima M. The factors associated with pain severity in patients with knee osteoarthritis vary according to the radiographic disease severity: a cross-sectional study. Osteoarthritis Cartilage 2013; 21:1179-84. [PMID: 23973128 DOI: 10.1016/j.joca.2013.05.014] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 04/09/2013] [Accepted: 05/20/2013] [Indexed: 02/02/2023]
Abstract
OBJECTIVES Knee osteoarthritis (OA) pain is suggested to be associated with inflammation and detrimental mechanical loading across the joint. In this cross-sectional study, we simultaneously examined the inflammation and alignment of the lower limb and examined how the pain components varied depending on the disease progression. DESIGN One-hundred sixty female medial type of early- [n = 74 in Kellgren-Lawrence (K/L) 2] to advanced-stage (n = 96 in K/L >2) knee OA subjects (70.5 years on average) were enrolled. Knee pain was evaluated using a pain visual analog scale (VAS) and the pain-related subcategory of the Japanese Knee Osteoarthritis Measure (JKOM-pain). The serum interleukin (sIL)-6 level reflecting synovitis, and the high sensitivity C-reactive protein (hs-CRP) level were measured to evaluate the severity of inflammation. The anatomical axis angle (AAA) was measured as an alignment index. The β-coefficient was estimated after adjusting for age and the body mass index (BMI) using a multiple linear regression analysis. RESULTS Multiple linear regression analyses showed that the sIL-6 levels, but not AAA, associated with the pain VAS [β = 10.77 (95% confidence interval (CI): 4.14-17.40), P < 0.01] and JKOM-pain scores [β = 3.19 (95% CI: 1.93-4.44), P < 0.001] in the early stage. Conversely, AAA, but not the sIL-6 levels, was found to be associated with the pain VAS [β = -1.29 (95% CI: -2.51 to -0.08), P < 0.05] and JKOM-pain scores [β = -0.49 (95% CI: -0.82 to -0.16), P < 0.01] in the advanced stage. CONCLUSIONS The presence of a higher level of sIL-6 and the varus alignment of the joint is associated with pain in early- and advanced-stage knee OA patients, respectively.
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Affiliation(s)
- Y Shimura
- Department of Orthopedics, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan.
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Watanabe T, Tsuchiya M, Suzuki T, Niwa T, Ohta H, Murakami N. P280: Seroprevalence of measles, rubella, mumps, and varicella among health care workers in Japan. Antimicrob Resist Infect Control 2013. [PMCID: PMC3687707 DOI: 10.1186/2047-2994-2-s1-p280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Tsuchiya M, Takahashi R, Furukawa A, Suehiro K, Mizutani K, Nishikawa K. Transversus abdominis plane block in combination with general anesthesia provides better intraoperative hemodynamic control and quicker recovery than general anesthesia alone in high-risk abdominal surgery patients. Minerva Anestesiol 2012; 78:1241-1247. [PMID: 23132262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND Patients with severe cardiovascular disease are frequently hemodynamically unstable during abdominal surgery. Improving the safety of such patients by stabilizing intraoperative hemodynamics remains a major concern for anesthesiologists. Transversus abdominis plane (TAP) block in combination with general anesthesia may facilitate optimum anesthetic management of these high-risk patients. METHODS Patients with cardiovascular disease classified as American Society of Anesthesiologists (ASA) physical status 3 were enrolled. The patients were undergoing elective abdominal surgery and were randomized to a group receiving general anesthesia and TAP block (Group T, N.=33) or a group receiving general anesthesia alone (Group G, N.=35). We compared the groups for intraoperative hemodynamic stability, anesthesia emergence time, amounts of anesthetics and opioids given, and frequency of emergency treatment with cardiovascular agents. A preliminary study demonstrated that systolic blood pressure and heart rate were maintained stable within 70-110% of their preanesthesia values throughout surgery in ASA 1 elderly patients without cardiovascular disease. Thus, the hemodynamically stable time was defined as the time when systolic blood pressure and heart rate were 70-110% of their preanesthesia values. The ratio of hemodynamically stable time to total operative time was used as an index of hemodynamic stability. RESULTS The median (minimum-maximum) percentage of hemodynamically stable time was longer in Group T (91[50-100]%) than Group G (79[40-91]%, P<0.01). The mean sevoflurane concentration, amount of fentanyl given and frequency of vasopressor use were lower in Group T than Group G (P<0.05). Anesthesia emergence time was shorter in Group T (14[4-30] min) than Group G (18[9-52] min, P<0.01). No worsening of cardiovascular complications was observed. CONCLUSION For abdominal surgery in patients with severe cardiovascular disease, combining TAP block with general anesthesia promotes intraoperative hemodynamic stability and early emergence from anesthesia.
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Affiliation(s)
- M Tsuchiya
- Department of Anesthesiology, Osaka City University Medical School, Abeno-Ku, Osaka, Japan.
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Chevrier R, Daugas JM, Gaudefroy L, Ichikawa Y, Ueno H, Hass M, Haas H, Cottenier S, Aoi N, Asahi K, Balabanski DL, Fukuda N, Furukawa T, Georgiev G, Hayashi H, Iijima H, Inabe N, Inoue T, Ishihara M, Ishii Y, Kameda D, Kubo T, Nanao T, Neyens G, Ohnishi T, Rajabali MM, Suzuki K, Takeda H, Tsuchiya M, Vermeulen N, Watanabe H, Yoshimi A. Is the 7/2(1)- isomer state of 43S spherical? Phys Rev Lett 2012; 108:162501. [PMID: 22680712 DOI: 10.1103/physrevlett.108.162501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2011] [Indexed: 06/01/2023]
Abstract
We report on the spectroscopic quadrupole moment measurement of the 7/2(1)(-) isomeric state in (16)(43)S(27) [E*=320.5(5) keV, T(1/2)=415(3) ns], using the time dependent perturbed angular distribution technique at the RIKEN RIBF facility. Our value, |Q(s)|=23(3) efm(2), is larger than that expected for a single-particle state. Shell model calculations using the modern SDPF-U interaction for this mass region reproduce remarkably well the measured |Q(s)|, and show that non-negligible correlations drive the isomeric state away from a purely spherical shape.
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Sawada T, Tsuchiya M, Takahashi T, Tsutsumi H, Mihara H. Cell-adhesive hydrogels composed of peptide nanofibers responsive to biological ions. Polym J 2012. [DOI: 10.1038/pj.2012.48] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Igawa T, Tsunoda H, Kikuchi Y, Yoshida M, Tanaka M, Koga A, Sekimori Y, Orita T, Aso Y, Hattori K, Tsuchiya M. VH/VL interface engineering to promote selective expression and inhibit conformational isomerization of thrombopoietin receptor agonist single-chain diabody. Protein Eng Des Sel 2010; 23:667-77. [DOI: 10.1093/protein/gzq034] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Tsuchiya M, Kajiro M, Murayama A, Yanagisawa J. 697 Bcl-2 functionally compensates for down-regulation of CHIP and protects cancer cells from cell death. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)71494-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Abstract
BACKGROUND The pleth variability index (PVI) is a new algorithm used for automatic estimation of respiratory variations in pulse oximeter waveform amplitude, which might predict fluid responsiveness. Because anesthesia-induced hypotension may be partly related to patient volume status, we speculated that pre-anesthesia PVI would be able to identify high-risk patients for significant blood pressure decrease during anesthesia induction. METHODS We measured the PVI, heart rate (HR), systolic blood pressure (SBP), diastolic blood pressure (DBP), and mean arterial pressure (MAP) in 76 adult healthy patients under light sedation with fentanyl to obtain pre-anesthesia control values. Anesthesia was induced with bolus administrations of 1.8 mg/kg propofol and 0.6 mg/kg rocuronium. During the 3-min period from the start of propofol administration, HR, SBP, DBP, and MAP were measured at 30-s intervals. RESULTS HR, SBP, DBP, and MAP were significantly decreased after propofol administration by 8.5%, 33%, 23%, and 26%, respectively, as compared with the pre-anesthesia control values. Linear regression analysis that compared pre-anesthesia PVI with the decrease in MAP yielded an r value of -0.73. Decreases in SBP and DBP were moderately correlated with pre-anesthesia PVI, while HR was not. By classifying PVI >15 as positive, a MAP decrease >25 mmHg could be predicted, with sensitivity, specificity, positive predictive, and negative predictive values of 0.79, 0.71, 0.73, and 0.77, respectively. CONCLUSION Pre-anesthesia PVI can predict a decrease in MAP during anesthesia induction with propofol. Its measurement may be useful to identify high-risk patients for developing severe hypotension during anesthesia induction.
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Affiliation(s)
- M Tsuchiya
- Department of Anesthesiology, Osaka City University Medical School, 1-5-7 Asahi-machi, Abeno-ku, Osaka 545-8586, Japan.
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Nagase S, Shinozaki T, Tsuchiya M, Tsujimura H, Masukawa Y, Satoh N, Itou T, Koike K. Characteristic microstructure of curved human hair. Int J Cosmet Sci 2010. [DOI: 10.1111/j.1468-2494.2010.00579_6.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abstract
Informational need assessment has become an important part of health care in order to provide information effectively in clinical settings. Literature on information needs in the West suggests that breast cancer (BC) patients needed more information than doctors had provided, and information that fully met their needs was associated with patients' long-term well-being. Since few studies on this issue have been conducted in Japan, where the general consultation style is less open and more indirect, compared with that in the West, the application of the findings in the West is questionable. The purpose of this qualitative study was to explore perceived information needs among female BC patients in Japan. Twelve Japanese women with BC participated in semi-structured face-to-face interviews. Grounded theory using verbatim transcripts extracted two main themes: information needed to minimize physical and psychological impacts of treatment and information needed for the resumption of normal life. These were closely related at two time points. Physical support after discharge was perceived as relatively insufficient, especially by women experiencing post-operative arm complications. More open and direct communication was preferred between patients and doctors/family members in the recovery phase. Unmet needs for information may lead to patients' distress.
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Affiliation(s)
- M Tsuchiya
- School of Psychology, Faculty of Medicine, Health and Life Sciences, University of Southampton, Highfield, Southampton, Hampshire, UK.
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Nagase S, Tsuchiya M, Matsui T, Shibuichi S, Tsujimura H, Masukawa Y, Satoh N, Itou T, Koike K, Tsujii K. J. Cosmet. Sci.,59, 263-289 (July/August 2008)�Characterization of curved hair of Japanese women with reference to internal structures and amino acid composition. Int J Cosmet Sci 2009. [DOI: 10.1111/j.1468-2494.2009.00510_5.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Pisco J, Tsuchiya M, Bilhim T, Duarte M, Santos D, Oliveira A. Abstract No. 81: Uterine Artery Embolization Under Electroacupuncture for Uterine Fibroids. J Vasc Interv Radiol 2009. [DOI: 10.1016/j.jvir.2008.12.071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Lam WWT, Tsuchiya M, Chan M, Chan SWW, Or A, Fielding R. Help-seeking patterns in Chinese women with symptoms of breast disease: a qualitative study. J Public Health (Oxf) 2008; 31:59-68. [DOI: 10.1093/pubmed/fdn088] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Abstract
Ameloblasts progress through defined stages of development as enamel forms on teeth. Pre-secretory ameloblasts give rise to tall columnar secretory ameloblasts that direct the enamel to achieve its full thickness. During the maturation stage, the ameloblasts shorten and direct the enamel to achieve its final hardened form. Here we ask how the volume of selected ameloblast organelles changes (percent volume per ameloblast) as ameloblasts progress through six defined developmental stages. We demonstrate that mitochondria volume peaks during late maturation, indicating that maturation-stage ameloblasts maintain a high level of metabolic activity. Also, the endoplasmic reticulum (ER) volume changes significantly as a function of developmental stage. This prompted us to ask if X-box-binding protein-1 (XBP1) plays a role in regulating ameloblast ER volume, as has been previously demonstrated for secretory acinar cells and for plasma cell differentiation. We demonstrate that Xbp1 expression correlates positively with percent volume of ameloblast ER.
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Affiliation(s)
- M Tsuchiya
- Department of Cytokine Biology, The Forsyth Institute, and Department of Developmental Biology, Harvard School of Dental Medicine, 140 The Fenway, Boston, MA 02115, USA
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Abstract
The continuing evolution of a variety of laparoscopic instrument and device has been gradually applied to the laparoscopic hepatectomy in many countries. Recent experience has persuaded us that there are great potential benefits derived from laparoscopic hepatectomy and much has been learned about patient selection, the grade of surgical difficulty with respect to tumor location, and the required instrumentation. Among these efforts, various ways of hepatic parenchymal transection with mechanical devices have been attempted and continuing to innovate to perform safe laparoscopic hepatectomy Important technologic developments and improved endoscopic procedures are being established equipment modifications. For safe laparoscopic hepatectomy, it is important to have all necessary equipment. The intraoperative laparoscopic ultrasonography, microwave coagulators, ultrasonic dissection, argon beam coagulators, laparoscopic coagulation shears, endolinear staplers and TissueLink monopolar sealer are essential. This procedure is in need that well experienced endoscopic surgeon and well-experienced liver surgeon should be collaborated in laparoscopic hepatectomy and the indications are strictly followed based upon the location and size of tumors. Finally critical determinant for success and safe laparoscopic hepatectomy is through familiarity with the relevant laparoscopic instruments and equipments. Laparoscopic hepatectomy is expected to develop further in the future as a new surgical instrument, equipment and method, which improves patients' quality of life.
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Affiliation(s)
- H. Kaneko
- Department of Surgery, Omori Hospital, Toho University School of MedicineTokyoJapan
| | - Y. Otsuka
- Department of Surgery, Omori Hospital, Toho University School of MedicineTokyoJapan
| | - M. Tsuchiya
- Department of Surgery, Omori Hospital, Toho University School of MedicineTokyoJapan
| | - A. Tamura
- Department of Surgery, Omori Hospital, Toho University School of MedicineTokyoJapan
| | - T. Katagiri
- Department of Surgery, Omori Hospital, Toho University School of MedicineTokyoJapan
| | - K. Yamazaki
- Department of Surgery, Omori Hospital, Toho University School of MedicineTokyoJapan
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Tsuchiya M, Iwasaki M, Otani T, Nitadori JI, Goto K, Nishiwaki Y, Uchitomi Y, Tsugane S. Breast cancer in first-degree relatives and risk of lung cancer: assessment of the existence of gene sex interactions. Jpn J Clin Oncol 2007; 37:419-23. [PMID: 17586847 DOI: 10.1093/jjco/hym048] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Previous studies have shown the sex differences in lung cancer and the associations between estrogen-related genes and non-small cell lung cancer. In the present study, we assumed the existence of shared candidate genes that are common in lung and breast cancers, and examined whether women with a family history of breast cancer are at increased risk of lung cancer compared with men, especially adenocarcinoma, in a case-only study. METHODS This case-only study was conducted based on the Lung Cancer Database Project at the National Cancer Center Hospital East. A total of 1566 patients with newly diagnosed primary lung cancer were consecutively recruited between 1999 and 2003. Information on their family history of cancer and smoking habit was obtained from a self-administered questionnaire. To assess an interactions between two factors, odds ratios for interaction (ORis) and 95% confidence intervals (CIs) were calculated by case-only contingency table. RESULTS A statistically significant ORi was observed between a family history of breast cancer in first-degree relatives (parent and siblings, not including children) and the sex of a patient (ORi: 2.22, 95% CI: 1.02-4.81). A stratified analysis by histologic subtypes showed a statistically significant ORi only for adenocarcinoma (ORi: 3.27, 95% CI: 1.19-8.98). No other family history of cancer, such as stomach, colon and lung cancer, showed a statistically significant ORi. CONCLUSION This study suggests the possibility of gene-sex interaction in lung cancer.
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Affiliation(s)
- Masaki Tsuchiya
- Epidemiology and Prevention Division, Research Center for Cancer Prevention and Screening, National Cancer Center, Tokyo, Japan
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Tanaka T, Tsukui R, Okano S, Tsuchiya M, Obokata K, Ogawa T, Abe T, Ikeya T, Miyasaki M. Continuous intravenous lidocaine controls abdominal pain secondary to peritoneal carcinomatosis as a consequence of diffusion into ascites. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.9031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
9031 Background: Our team reported at the 42nd ASCO meeting that continuous, low-dose intravenous (IV) lidocaine is an effective method for pain relief in terminal patients with peritoneal carcinomatosis. Our aim was to explore the mechanism by which abdominal pain of terminally-ill patients with peritoneal carcinomatosis was improved by continuous IV lidocaine. Methods: 48 patients with peritoneal carcinomatosis due to GI (46) and GYN (2) malignancies were administered lidocaine at low-doses (0.4 and/or 0.8mg/kg- h) for >24 hours, because opiates, NSAIDs, and other adjuvants were ineffective in relieving their abdominal pain. Pain (faces rating scale; 0-no pain, 5-worst pain), oral intake, side effects, and activities of daily life were quantified. Two days after beginning lidocaine, ascites was sampled to measure ascitic concentration of lidocaine, tumor markers and cytology. Results: Mean age (±SE) was 60±2. The volume of ascites was estimated to be 2,700±400ml by the ultrasound 5 points methodology. Abdominal symptoms improved in 1.5±0.2days after beginning lidocaine, and the pain scale decreased from 1.9±0.2 to 0.5±0.1; p<0.001; 75% of patients had improvement in pain of whom 78% had complete relief of pain. Oral intake increased from 18% to 49% of baseline (p<0.001), and 67% in those with improvement in pain had an increased volume of oral intake. There were no obvious differences in response to 0.4 and 0.8 mg/kg-h in patients receiving both doses. Serum concentrations of lidocaine at 0.4 and 0.8 mg/kg-h were 1.7±0.2 and 3.2±0.2 μg/ml, respectively; lidocaine concentrations in the ascites were 1.2±0.2 and 2.1±0.2 μg/ml. No patient complained of pain at the time of peritoneal puncture. Side effects included bradycardia of <60 beats per minutes (3 patients). The duration of lidocaine administration was 23±3 days; 43% of patients were able to be discharged home for end-of-life care, with parenteral nutrition and continuation of lidocaine administration or oral mexiletine (300–450 mg/day) for adjuvant analgesia. Conclusions: Lidocaine diffuses into ascites and almost equilibrates with serum concentrations acting as a peritoneal anesthesia which, as a result, controls abdominal pain in patients with peritoneal carcinomatosis. No significant financial relationships to disclose.
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Affiliation(s)
- T. Tanaka
- Maebashi Red Cross Hospital, Maebashi, Gunma, Japan
| | - R. Tsukui
- Maebashi Red Cross Hospital, Maebashi, Gunma, Japan
| | - S. Okano
- Maebashi Red Cross Hospital, Maebashi, Gunma, Japan
| | - M. Tsuchiya
- Maebashi Red Cross Hospital, Maebashi, Gunma, Japan
| | - K. Obokata
- Maebashi Red Cross Hospital, Maebashi, Gunma, Japan
| | - T. Ogawa
- Maebashi Red Cross Hospital, Maebashi, Gunma, Japan
| | - T. Abe
- Maebashi Red Cross Hospital, Maebashi, Gunma, Japan
| | - T. Ikeya
- Maebashi Red Cross Hospital, Maebashi, Gunma, Japan
| | - M. Miyasaki
- Maebashi Red Cross Hospital, Maebashi, Gunma, Japan
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