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2008 Fiscal Year Annual Research Report

機械受容チャネルを核としたメカノバイオロジーの創成

Research Project

Project/Area Number 16GS0308
Research InstitutionNagoya University

Principal Investigator

曽我部 正博  Nagoya University, 大学院・医学系研究科, 教授 (10093428)

Co-Investigator(Kenkyū-buntansha) 辰巳 仁史  名古屋大学, 大学院・医学系研究科, 准教授 (20171720)
Keywordsメカノバイオロジー / SAチャネル / 細胞骨格 / 接着斑 / チャネルブロッカー
Research Abstract

細胞の機械刺激受容・応答能は生命現象を支える根幹機能であり、基礎生物学だけではなく、医学の発展に欠かせない極めて重要な研究対象である。しかし、機械刺激の受容から応答に至る細胞内分子機構は全く未解明の状態である。本研究の目標は、最近同定されたSA(伸展刺激活性化)チャネルを対象に、1)SAチャネル活性化(開閉)機構の解明、2)機械受容における細胞骨格の役割解明、特に力の方向(ベクトル)センサーであることの検証、および、3)新規SAチャネルブロッカーの設計合成を目指し、"メカノバイオロジー"という新領域の基盤形成を行うことを目標にしている。本年度は以下のような成果が得られた。1)高次構造(閉構造)が判明している細菌SAチャネルMscLやMscSに関して、これまで点突然変異法を用いて膜張力の感知部位等を決定してきたが、加えて分子動力学計算によっても実験的解釈を支持する結果が得られた。すなわち、張力感知アミノ酸残基が脂質と特異的に強く結合し、張力増加に伴いその残基を含む膜貫通ヘリックスが膜面方向に倒されながらチャネルが開口する様子がシミュレートできた。2)MscLの活性化剤である両親媒性物質クロルプロマジンのMscLのゲーティング機構に対する作用を詳細に検討した結果、メカノセンサー部位とチャネルゲーティング部位の連関に関する重要な知見が得られMscLの開口にはメカノセンサーが必須であることを見出した。3)高等生物(血管内皮細胞)では、細胞骨格(アクチン線維)そのものが、内部張力の程度に応じてコフィリン存在化で崩壊する機械センサーとして機能することを見いだした。4)開発した還流心モデルを使って、疫学調査を参考に既存薬物のスクリーニングを行い、ある種のスタチンが心房細動に対し急性抑制効果を有することを見いだした。

  • Research Products

    (53 results)

All 2010 2009 2008 Other

All Journal Article (22 results) (of which Peer Reviewed: 20 results) Presentation (30 results) Remarks (1 results)

  • [Journal Article] Differential effect of double-pulse TMS applied to dorsal premotor cortex and precuneus during internal operation of visuospatial information2010

    • Author(s)
      Oshio R, 他5名
    • Journal Title

      Neuroimage 49

      Pages: 1108-1115

    • Peer Reviewed
  • [Journal Article] Involvement of PI3K/Akt/TOR pathway in stretch-induced hypertrophy of myotubes2010

    • Author(s)
      Sasai N, 他6名
    • Journal Title

      Muscle Nerve 41

      Pages: 100-106

    • Peer Reviewed
  • [Journal Article] Treatment with progesterone after focal cerebral ischemia suppresses proliferation of progenitor cells but enhances survival of newborn neurons in adult male mice2010

    • Author(s)
      Zhang Z, 他5名
    • Journal Title

      Neuropharmacology (印刷中)

    • Peer Reviewed
  • [Journal Article] DMXB(GTS-21)ameliorates the cognitive deficits in beta amyloid(25-35(-))injected mice through preventing the dysfunction of alpha7 nicotinic receptor2010

    • Author(s)
      Chen L, 他6名
    • Journal Title

      J Neurosci Res. (印刷中)

    • Peer Reviewed
  • [Journal Article] DHEA prevents Abeta(25-35)-impaired survival of newborn neurons in the dentate gyrus through a modulation of PI(3)K-Akt-mTOR signaling2010

    • Author(s)
      Li L, 他5名
    • Journal Title

      Neuropharmacology (印刷中)

    • Peer Reviewed
  • [Journal Article] Chlamydomonas CAV2 encodes a voltage- dependent calcium channel required for the flagellar waveform conversion2009

    • Author(s)
      Fujiu K, Nakayama Y, Yanagisawa A, Sokabe M, Yoshimura K.
    • Journal Title

      Curr Biol. 19

      Pages: 133-139

    • Peer Reviewed
  • [Journal Article] DHEA-neuroprotection and -neurotoxicity after transient cerebral ischemia in rats2009

    • Author(s)
      Zhou R, 他5名
    • Journal Title

      Neuroscience 159

      Pages: 287-296

    • Peer Reviewed
  • [Journal Article] Regulation of endothelin-1-induced interleukin-6 production by Ca2+ influx in human airway smooth muscle cells2009

    • Author(s)
      Iwata S, 他8名
    • Journal Title

      Eur J Pharmacol 605

      Pages: 15-22

    • Peer Reviewed
  • [Journal Article] Progesterone promotes the survival of newborn neurons in the dentate gyrus of adult male mice2009

    • Author(s)
      Zhang Z, 他5名
    • Journal Title

      Hippocampus 20

      Pages: 402-412

    • Peer Reviewed
  • [Journal Article] Repetitive stretch suppresses denervation-induced atrophy of soleus muscle in rats2009

    • Author(s)
      Agata N, 他6名
    • Journal Title

      Muscle Nerve. 39

      Pages: 456-462

    • Peer Reviewed
  • [Journal Article] Structural changes in the cytoplasmic domain of the mechanosensitive channel MscS during opening2009

    • Author(s)
      Machiyama H, Tatsumi H, Sokabe M.
    • Journal Title

      Biophys J. 97

      Pages: 1048-57

    • Peer Reviewed
  • [Journal Article] Stress-Axis Regulated Exon(STREX)in the C terminus of BK(Ca)channels is responsible for the stretch sensitivity2009

    • Author(s)
      Naruse K, Tang QY, Sokabe M.
    • Journal Title

      Biochem Biophys Res Commun 385

      Pages: 634-639

    • Peer Reviewed
  • [Journal Article] Roles of disrupted-in-schizophrenia 1-interacting protein girdin in postnatal development of the dentate gyrus2009

    • Author(s)
      Enomoto A, 他18名
    • Journal Title

      Neuron. 63

      Pages: 774-787

    • Peer Reviewed
  • [Journal Article] Mechanical stretch enhances IL-8 production in pulmonary microvascular endothelial cells2009

    • Author(s)
      Iwaki M, 他10名
    • Journal Title

      Biochem Biophys Res Commun 389

      Pages: 531-536

    • Peer Reviewed
  • [Journal Article]2009

    • Author(s)
      曽我部正博
    • Journal Title

      細胞膜の透過性と物質輸送、In「標準細胞生物学第2版」(近藤、柴田、藤本、溝口編)(医学書院)

      Pages: 90-98

  • [Journal Article]2009

    • Author(s)
      曽我部正博
    • Journal Title

      動物の思考と意識、In「動物は何を考えているのか?:学習と記憶の比較生物学」(曽我部編)(共立出版)

      Pages: 1-15

  • [Journal Article] Transient receptor potential vanilloid 4 deficiency suppresses unloading-induced bone loss2008

    • Author(s)
      Mizoguchi F, 他10名
    • Journal Title

      J.Cell Physiol 216

      Pages: 47-53

    • Peer Reviewed
  • [Journal Article] A novel Ca2+ influx pathway activated by mechanical stretch in human airway smooth muscle cells2008

    • Author(s)
      Ito S, 他7名
    • Journal Title

      Am J Respir Cell Mol Biol. 38

      Pages: 407-413

    • Peer Reviewed
  • [Journal Article] Two different molecular mechanisms underlying progesterone neuroprotection against ischemic brain damage2008

    • Author(s)
      Cai W, 他5名
    • Journal Title

      Neuropharmacology 55

      Pages: 127-138

    • Peer Reviewed
  • [Journal Article] Tuning the mechanosensitivity of a BK channel by changing the linker length2008

    • Author(s)
      Zhao H, Sokabe M
    • Journal Title

      Cell Res. 18

      Pages: 871-878

    • Peer Reviewed
  • [Journal Article] Mechanical forces facilitate actin polymerization at focal adhesions in a zyxin-dependent manner2008

    • Author(s)
      Hirata H, Tatsumi H, Sokabe M.
    • Journal Title

      J.Cell Sci. 121

      Pages: 2795-2804

    • Peer Reviewed
  • [Journal Article] Nitric oxide(NO)increase at fertilization in sea urchin eggs upregulates fertilization envelope hardening2008

    • Author(s)
      Mohri T, Sokabe M, Kyozuka K.
    • Journal Title

      Dev Biol 322

      Pages: 251-262

    • Peer Reviewed
  • [Presentation] Roles of actin filaments in cell mechanotransduction2010

    • Author(s)
      曽我部正博
    • Organizer
      Fifty Years of Biophysics Research at Nagoya University
    • Place of Presentation
      Nagoya, Japan
    • Year and Date
      20100312-20100314
  • [Presentation] Gating mechanisms of mechanosensitive ion channel : roles of water2010

    • Author(s)
      曽我部正博
    • Organizer
      International Symposium on Hydration and ATP Energy
    • Place of Presentation
      Sendai, Japan
    • Year and Date
      20100307-20100310
  • [Presentation] Overview of Cell Mechanosensing Project "Mechanotransduction by supra-molecular complex"2010

    • Author(s)
      曽我部正博
    • Organizer
      13^<th> International Membrane Research Forum
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      20100127-20100129
  • [Presentation] Introduction to Mechanobiology : Biophysics and Physiology of Cell Mechanosensing2010

    • Author(s)
      曽我部正博
    • Organizer
      Physiology Seminar at University of Pennsylvania
    • Place of Presentation
      Philadelphia, USA
    • Year and Date
      2010-03-25
  • [Presentation] Time-dependent differential roles of actin cytoskeleton under mechanical stress2009

    • Author(s)
      曽我部正博
    • Organizer
      The 3^<rd> Mechanobiology Workshop
    • Place of Presentation
      NUS, Singapore
    • Year and Date
      20091103-20091106
  • [Presentation] アクチンは張力センサーである2009

    • Author(s)
      辰己仁史, 早川公英, 曽我部正博
    • Organizer
      日本生物物理学会第47回年会
    • Place of Presentation
      アスティ徳島(徳島県)
    • Year and Date
      20091030-20091101
  • [Presentation] アクチンフィラメントの力学的ふるまい:分子動力学シミュレーション2009

    • Author(s)
      安達泰治, 松下慎二, 井上康博, 北條正樹, 曽我部正博
    • Organizer
      日本生物物理学会第47回年会
    • Place of Presentation
      アスティ徳島(徳島県)
    • Year and Date
      20091030-20091101
  • [Presentation] 非機械感受性イオンチャネルは本当に機械刺激によって開かないか?-粗視化分子動力学シミュレーション研究-2009

    • Author(s)
      高橋賢, 曽我部正博
    • Organizer
      日本生物物理学会第47回年会
    • Place of Presentation
      アスティ徳島(徳島県)
    • Year and Date
      20091030-20091101
  • [Presentation] アクチン調節タンパク質 zyxin のストレスファイバーへの張力依存的会合2009

    • Author(s)
      平田宏聡, 辰己仁史, 曽我部正博
    • Organizer
      日本生物物理学会第47回年会
    • Place of Presentation
      アスティ徳島(徳島県)
    • Year and Date
      20091030-20091101
  • [Presentation] アクチンフィラメントの運動自由度の制限はコフィリンの結合頻度を低下させる2009

    • Author(s)
      早川公英, 船戸雄介, 辰己仁史, 曽我部正博
    • Organizer
      日本生物物理学会第47回年会
    • Place of Presentation
      アスティ徳島(徳島県)
    • Year and Date
      20091030-20091101
  • [Presentation] 異なったキネティクスを持った経路が乳腺におけるATP放出に関わっている2009

    • Author(s)
      古家喜四夫, 原田京子, 曽我部正博
    • Organizer
      日本生物物理学会第47回年会
    • Place of Presentation
      アスティ徳島(徳島県)
    • Year and Date
      20091030-20091101
  • [Presentation] 張力がアクチンフィラメントの力学特性に及ぼす影響2009

    • Author(s)
      松下慎二, 安達泰治, 井上康博, 北條正樹, 曽我部正博
    • Organizer
      日本生物物理学会第47回年会
    • Place of Presentation
      アスティ徳島(徳島県)
    • Year and Date
      20091030-20091101
  • [Presentation] 大腸菌機械受容チャネルMscLのメカノゲーティングにおける水の浸潤と透過の役割2009

    • Author(s)
      澤田康之, 村瀬雅樹, 曽我部正博
    • Organizer
      日本生物物理学会第47回年会
    • Place of Presentation
      アスティ徳島(徳島県)
    • Year and Date
      20091030-20091101
  • [Presentation] 試験管再構成モデルを用いた力刺激による接着関連タンパク質の集積2009

    • Author(s)
      清島大資, 平田宏聡, 辰己仁史, 曽我部正博
    • Organizer
      日本生物物理学会第47回年会
    • Place of Presentation
      アスティ徳島(徳島県)
    • Year and Date
      20091030-20091101
  • [Presentation] Molecular Biophysics of mechanosensitive ion channels2009

    • Author(s)
      曽我部正博
    • Organizer
      IUPS Congress2009
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      20090727-20090801
  • [Presentation] ANTI-CHOLESTEROL DRUG STATINS AFFECT STRETCH-INDUCED CALCIUM INFLUX IN THE CARDIOMYOCYTE CELL LINE H9c22009

    • Author(s)
      Takahashi K, Omori M, Sokabe M
    • Organizer
      IUPS Congress2009
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      20090727-20090801
  • [Presentation] ACTIVATION MECHANISM OF BACTERIAL MECHANOSENSITIVE CHANNEL MscL BY CHLORPROMAZINE2009

    • Author(s)
      Nomura T, Yoshimura K, Sokabe M
    • Organizer
      IUPS Congress2009
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      20090727-20090801
  • [Presentation] MULTI PATHWAYS OF ATP-RELEASE IN MAMMARY EPITHELIAL CELLS REVEALED BY ATP IMAGING2009

    • Author(s)
      古家喜四夫, 原田京子, 曽我部正博
    • Organizer
      IUPS Congress2009
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      20090727-20090801
  • [Presentation] A ROLE OF NITRIC OXIDE(NO)AND ITS CELL SIGNALLING AT FERTILIZATION IN SEA URCHIN EGGS.2009

    • Author(s)
      Mohri T, Sokabe M, Kyozuka K
    • Organizer
      IUPS Congress2009
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      20090727-20090801
  • [Presentation] STRETCH-ACTIVATED CALCIUM RESPONSE OF A RAT CARDIOM YOCYTE CELL LINE H9c22009

    • Author(s)
      Takahashi K, Hattori M, Sokabe M
    • Organizer
      IUPS Congress2009
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      20090727-20090801
  • [Presentation] Role of cytoskeleton in mechanotransduction2009

    • Author(s)
      曽我部正博
    • Organizer
      Gordon Research Conference : Cellular Osmoregul ation & Mechanotransduction
    • Place of Presentation
      Biddeford, ME USA
    • Year and Date
      20090705-20090710
  • [Presentation] Nanobiology of cell mechanotransduction2009

    • Author(s)
      曽我部正博
    • Organizer
      First World Congress of International Academy of Nanomedicine(IANM)
    • Place of Presentation
      Sanya, Hainan, China
    • Year and Date
      20090611-20090614
  • [Presentation] Molecular dynamics simulations on the mechanosensitive ion channel2009

    • Author(s)
      曽我部正博
    • Organizer
      Computaional Biology and Robotics 2009
    • Place of Presentation
      Phuket, Thailand
    • Year and Date
      20090408-20090413
  • [Presentation] Molecular mechanisms of neuroprotection by neurosteroids against ischemic brain damages2009

    • Author(s)
      曽我部正博
    • Organizer
      The 11th meeting Hirosaki International Forum of Medical Science : Emerging Frontiers in Brain Research-Crossroads of metabolic regulation, stress response and disease
    • Place of Presentation
      Hirosaki, Japan
    • Year and Date
      20090327-20090328
  • [Presentation] Frontier research on cell-mechanosensing : Ms channel and cytoskeleton2009

    • Author(s)
      曽我部正博
    • Organizer
      6th Asian Biophysics Association(ABA)Symposium
    • Place of Presentation
      Hong Kong
    • Year and Date
      20090111-20090114
  • [Presentation] 機械受容チャネルの膜張力感知とゲーティングの物理化学的本質2009

    • Author(s)
      曽我部正博, 澤田康之
    • Organizer
      日本分子生物学会第32回年会
    • Place of Presentation
      パシフィコ横浜(神奈川県)
    • Year and Date
      2009-12-10
  • [Presentation] ATP-releases via multiple pathways in mammary epithelial cells revealed by ATP imaging2009

    • Author(s)
      古家喜四夫, 原田京子, 曽我部正博
    • Organizer
      40th NIPS International Symposium
    • Place of Presentation
      Okazaki, Japan
    • Year and Date
      2009-08-04
  • [Presentation] Biophysics of cell mechanosensor at work : structure function of an MS channel protein2008

    • Author(s)
      曽我部正博
    • Organizer
      5th Structural Biology & Functional Genomics and 1st Biological Physics International Conference
    • Place of Presentation
      Singapore
    • Year and Date
      20081209-20081211
  • [Presentation] Gating mechanisms of mechanosensitive ion channels : interactions aniong lipid, protein and water2008

    • Author(s)
      曽我部正博
    • Organizer
      Workshop on Water and Cell Physilogy
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      20081125-20081127
  • [Presentation] Biophysics of Cell Mechanosensors : from channel to cytoskeleton2008

    • Author(s)
      曽我部正博
    • Organizer
      The 2^<nd> Workshop on Mechanobiology
    • Place of Presentation
      Singapore
    • Year and Date
      20081103-20091106
  • [Remarks]

    • URL

      http://www.med.nagoya-u.ac.jp/physiol2

URL: 

Published: 2011-06-16   Modified: 2016-04-21  

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