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Elucidation of cell membrane fluidity by updating the system from a model system to a biological system

Research Project

Project/Area Number 20K03873
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 13040:Biophysics, chemical physics and soft matter physics-related
Research InstitutionTohoku University

Principal Investigator

Sakuma Yuka  東北大学, 理学研究科, 講師 (40630801)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywordsモデル細胞膜 / 細胞膜流動性 / 膜粘度 / ベシクル / 膜流動性 / 脂質膜粘度 / 初期胚 / 細胞膜 / マイクロインジェクション / 相分離 / 膜流動 / 脂質膜
Outline of Research at the Start

本研究では生体膜の流動特性を支配する要因の解明を試みる。最近研究代表者は、生体膜のような不均一で球状の膜に適用可能な粘度測定法を開発した。これを用いてモデル生体膜の不均一性や非対称性などの条件を段階的に生体膜に近づけ、最終的には生きた生体膜で粘度測定を行う。これにより、生きて細胞骨格から力学的な揺動を受けている非平衡状態と、死んで平衡状態の膜の流動特性の違い及びそれをを決定づける要因を解明する。

Outline of Final Research Achievements

Since the membrane fluidity plays important roles in the cellular functions, the viscosity of model lipid membrane (GUV) has been investigated. Cell membranes are composed of not only lipids and proteins but also polysaccharide chain-anchored molecules, such as glycoproteins and glycolipids, which are expected to affect the membrane fluidity. To reveal the effects of grafted polymers on the membrane fluidity, in this study, we measured the membrane viscosity of polymer grafted GUVs. The obtained membrane viscosity of polymer-grafted GUVs increased with increasing polymer density up to several times. The increase of membrane viscosity of polymer -grafted GUVs is governed by the contact interaction among polymer chains. To understand the difference in membrane fluidity between non-living and living cells, we also measured the membrane fluidity of unfertilized and fertilized eggs of C. elegans and ascidians.

Academic Significance and Societal Importance of the Research Achievements

脂質、タンパク質、多糖類からなる細胞膜の流動性は、膜内の機能分子の輸送を通じて細胞機能を制御している。多糖鎖などの膜から伸びる高分子鎖は、膜の流動性に大きく影響することが予想されるが、その解明はまだなされていない。本研究では、高分子をグラフトしたモデル生体膜の膜粘度を高分子密度の関数として測定し、膜粘度が最大で数倍まで上昇することを見出した。さらに、 膜にグラフトした高分子鎖間の相互作用を考慮した理論モデルを立て、高分子鎖間の相互作用が膜粘度を上昇させることを明らかにした。本研究は、細胞膜の流動性制御を理解するための新たな知見を提供するものである。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (19 results)

All 2023 2022 2021 2020 Other

All Journal Article (6 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Remarks (4 results)

  • [Journal Article] Synthesising a minimal cell with artificial metabolic pathways2023

    • Author(s)
      Kurisu Minoru、Katayama Ryosuke、Sakuma Yuka、Kawakatsu Toshihiro、Walde Peter、Imai Masayuki
    • Journal Title

      Communications Chemistry

      Volume: 6 Issue: 1 Pages: 56-56

    • DOI

      10.1038/s42004-023-00856-y

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] From vesicles toward protocells and minimal cells2022

    • Author(s)
      Imai Masayuki、Sakuma Yuka、Kurisu Minoru、Walde Peter
    • Journal Title

      Soft Matter

      Volume: 18 Issue: 26 Pages: 4823-4849

    • DOI

      10.1039/d1sm01695d

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Vesicle deformation and division induced by flip-flops of lipid molecules2021

    • Author(s)
      Urakami Naohito、Sakuma Yuka、Chiba Toshikaze、Imai Masayuki
    • Journal Title

      Soft Matter

      Volume: 17 Issue: 37 Pages: 8434-8445

    • DOI

      10.1039/d1sm00847a

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Birthing of a daughter vesicle in a model system for self-reproduction vesicles2021

    • Author(s)
      Khunpetch Petch、Sakuma Yuka、Imai Masayuki、Kawakatsu Toshihiro
    • Journal Title

      Physics of Fluids

      Volume: 33 Issue: 7 Pages: 077103-077103

    • DOI

      10.1063/5.0052248

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Viscosity of multicomponent liposome2021

    • Author(s)
      Sakuma Yuka
    • Journal Title

      MEMBRANE

      Volume: 46 Issue: 2 Pages: 58-64

    • DOI

      10.5360/membrane.46.58

    • NAID

      130008021539

    • ISSN
      0385-1036, 1884-6440
    • Related Report
      2020 Research-status Report
  • [Journal Article] Morphologies of Vesicle Doublets: Competition among Bending Elasticity, Surface Tension, and Adhesion2020

    • Author(s)
      Murakami Kei、Ebihara Ryuta、Kono Takuma、Chiba Toshikaze、Sakuma Yuka、Ziherl Primo?、Imai Masayuki
    • Journal Title

      Biophysical Journal

      Volume: 119 Issue: 9 Pages: 1735-1748

    • DOI

      10.1016/j.bpj.2020.09.030

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Membrane viscosity: from artificial cells to living cells2022

    • Author(s)
      Yuka Sakuma
    • Organizer
      25th Anniversary Symposium of German-Japanese Joint Research Project on Non-equilibrium Statistical Physics Perspectives for Future Collaboration
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 高分子をグラフトしたベシクルの膜流動特性2022

    • Author(s)
      佐久間由香
    • Organizer
      第10回ソフトマター研究会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Viscosity of polymer grafted ternary lipid vesicle2022

    • Author(s)
      Yuka Sakuma
    • Organizer
      日本生物物理学会第60回年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Viscosity Landscape of Ternary Vesicles in Composition-Temperature Space2022

    • Author(s)
      Juria Tanaka, Kenya Haga, Masayuki Imai, and Yuka Sakuma
    • Organizer
      日本生物物理学会第60回年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Morphology of Adhering Vesicles2022

    • Author(s)
      Toshikaze Chiba, Hironori Sugiyama, Taro Toyota, Yuka Sakuma, Masayuki Imai, Primoz Ziherl
    • Organizer
      日本生物物理学会第60回年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ベシクルの自己生産: 人工ミニマルセルのボトムアップなデザイン2022

    • Author(s)
      Minoru Kurisu, Peter Walde, Yuka Sakuma, and Masayuki Imai
    • Organizer
      日本生物物理学会第60回年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 配列情報と連携したベシクル膜の成長:進化可能なミニマルセルを目指して2022

    • Author(s)
      Ryosuke Katayama, Minoru Kurisu, Yuka Sakuma, and Masayuki Imai
    • Organizer
      日本生物物理学会第60回年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 相分離した脂質ベシクルの膜粘度測定2021

    • Author(s)
      佐久間由香
    • Organizer
      日本物理学会2021年秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Membrane viscosity of heterogeneous multi component liposome2021

    • Author(s)
      佐久間由香
    • Organizer
      第59回日本生物物理学会年会
    • Related Report
      2021 Research-status Report
  • [Remarks] Researchmap

    • URL

      https://researchmap.jp/7000002153

    • Related Report
      2022 Annual Research Report
  • [Remarks] 東北大学 ソフトマター・生物物理研究室

    • URL

      https://www.bio.phys.tohoku.ac.jp/

    • Related Report
      2022 Annual Research Report
  • [Remarks] 東北大学理学研究科物理学専攻 ソフトマター・生物物理研究室

    • URL

      https://www.bio.phys.tohoku.ac.jp

    • Related Report
      2021 Research-status Report
  • [Remarks] researchmap

    • URL

      https://researchmap.jp/7000002153

    • Related Report
      2021 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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