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脂質二分子膜ベシクルにおける相分離と形態のカップリング

Research Project

Project/Area Number 18048034
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionKyushu University

Principal Investigator

市川 正敏  Kyushu University, 理学研究院, 助教 (40403919)

Project Period (FY) 2006 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 2007: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2006: ¥1,200,000 (Direct Cost: ¥1,200,000)
Keywordsベシクル / リポソーム / レーザートラップ / 相分離 / バイオリアクター
Research Abstract

本研究の目的は、多成分の脂質二分子膜ベシクル上で起こる2次元的な相分離に於ける、相分離とベシクル形態の関係を明らかにする事である。膜の相分離は、細胞活動で重要な役割を果たしているラフトの化学物理的な現象との関わりが示唆されており、生化学的な見地からも注目されている。本年度は、前年度に引き続き開発した装置での物性測定を行い、既存の理論モデルに結果を当てはめる事で脂質膜ベシクルめ張力係数と曲げ剛性率を測定した。通常、力測定が可能な場合でも1変数の力測定では張力係数か曲げ剛性率の一方、もしくはその比しか解析で導く事が出来ないが、伸張速度とそこで得られる力の依存も取得する事で、両方の係数を同時に得る事が出来る。精度はマイクロピペットを用いた方法と同等かやや上回り、数pNから100pNを越える変形力を必要とする実験に使用できる。この測定を混合脂質膜及び相分離脂質膜に適用し比較検討を行った。相分離しない混合脂質では膜の荷電の増加に伴い表面張力の増加が確認できた、これはベシクル変形に於ける変形経路が変化する事を示唆される。また、この様な単純な混合脂質では力学プロファイルは単成分脂質と相同であるのに対して、相分離脂質膜、もしくは相分離を起こした場合は力学プロファイルに顕著な相違が測定される事が明らかになった。これは、力学測定から脂質膜の相分離を同定出来る事を示したという事であり、脂質2分子膜系の今後の基礎研究の発展に寄与する成果である。この成果を論文としてまとめ投稿中である。

Report

(2 results)
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (32 results)

All 2008 2007 2006

All Journal Article (22 results) (of which Peer Reviewed: 9 results) Presentation (8 results) Book (1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Direct measurement of force between colloidal particles in a nematic liquid crystal2008

    • Author(s)
      K., Takahashi, et. al.
    • Journal Title

      Journal of Physics: Condensed Matter 20

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Tilt control I optical tweezers2008

    • Author(s)
      Masatoshi, Ichikawa, et. al.
    • Journal Title

      Journal of Biomedical Optics 13

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Force between colloidal particles in a nematic liquid crystal studied by optical tweezers2008

    • Author(s)
      K., Takahashi, et. al.
    • Journal Title

      Physical Review E 77

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Self assembly of polymer droplets in a nematic liquid crystal at phase separation2008

    • Author(s)
      K., Kita, et. al.
    • Journal Title

      Physical Review E (in press)

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Extension of a DNA Molecule by Local Heating with a Laser2007

    • Author(s)
      Masatoshi, Ichikawa, et. al.
    • Journal Title

      Physical Review. Letters 99

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Single cell manipulation by using tilt controlled optical tweezers2007

    • Author(s)
      Masatoshi, Ichikawa, et. al.
    • Journal Title

      Proc. IEEE 2007 Int. Symp. MHS

      Pages: 316-321

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Direct Measurement of Interaction Between Colloidal Particles in Namatic Liquid Crystal2007

    • Author(s)
      K., Takahashi, et. al.
    • Journal Title

      Molecular Crystal & Liquid Crystal 475

      Pages: 183-192

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Nonliear dielectric spectrsocopy of MHPOBC2007

    • Author(s)
      K., Tanaka, et. al.
    • Journal Title

      Molecular Crystal & Liquid Crystal 477

      Pages: 195689-204698

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Nonliear dielectric study of critical behavior near Isotropic-Nematic phase transition2007

    • Author(s)
      K., Tsutsumi, et. al.
    • Journal Title

      Molecular Crystal & Liquid Crystal 477

      Pages: 77371-85579

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Experimental study of lateral diffusion on the bilayer membrane2007

    • Author(s)
      Ichikawa, Masatoshi, et. al.
    • Journal Title

      物性研究 Vol.89

      Pages: 132-133

    • Related Report
      2007 Annual Research Report
  • [Journal Article] Conformation and dynamics of a single DNA molecule confined by walls2007

    • Author(s)
      Uemura, Hitoshi, et. al.
    • Journal Title

      物性研究 Vol.89

      Pages: 138-139

    • Related Report
      2007 Annual Research Report
  • [Journal Article] Control of Selr-Assembly Patterns Formed in Liquid Crystal-Polymer Mixture2007

    • Author(s)
      Kawafuji, Hiroshi, et. al.
    • Journal Title

      物性研究 Vol.89

      Pages: 136-137

    • Related Report
      2007 Annual Research Report
  • [Journal Article] Pattern Formation of Polymer Droplets Phase separated in Nematic Liquid Crystal2007

    • Author(s)
      Kita, Kosuke, et. al.
    • Journal Title

      物性研究 Vol.89

      Pages: 66-67

    • Related Report
      2007 Annual Research Report
  • [Journal Article] Measurment of interparticle force between colloidal particles in nematic liquid crystal by optical tweezers2007

    • Author(s)
      Takahashi, Kenji, et. al.
    • Journal Title

      物性研究 Vol.89

      Pages: 64-65

    • Related Report
      2007 Annual Research Report
  • [Journal Article] Dynamics of colloidal particles in nematic liquid crystals2007

    • Author(s)
      K.Takahashi et al.
    • Journal Title

      Molecular Crystals and Liquid Crystals (in press)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Nonlinear dielectric spectroscopy of MHPOBC2007

    • Author(s)
      K.Tanaka et al.
    • Journal Title

      Molecular Crystals and Liquid Crystals (in press)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Nonlinear dielectric study of critical behavior near Isotropic-Nematic phase transition2007

    • Author(s)
      Y.Kimura et al.
    • Journal Title

      Molecular Crystals and Liquid Crystals (in press)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Dynamic study of micro-domains on a phospholipid bilayer membrane2006

    • Author(s)
      M.Ichikawa et al.
    • Journal Title

      Proc. 2006 IEEE Int. Symp. MHS

      Pages: 365-370

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Pattern formation at phase separation in the mixture of liquid crystals and polymers2006

    • Author(s)
      K.Kita et al.
    • Journal Title

      物性研究 87巻1号

      Pages: 91-92

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Interaction between colloidal spheres studied by optical tweezers2006

    • Author(s)
      Y.Fujiwara et al.
    • Journal Title

      物性研究 87巻1号

      Pages: 150-151

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Mechanical property of a giant liposome studied by laser tweezers2006

    • Author(s)
      Y.Shitamichi et al.
    • Journal Title

      物性研究 87巻1号

      Pages: 133-134

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Streching a long DNA molecule by use of local heating2006

    • Author(s)
      M.Ichikawa et al.
    • Journal Title

      物性研究 87巻1号

      Pages: 135-136

    • Related Report
      2006 Annual Research Report
  • [Presentation] レーザー場下でのミクロ蒸気機関2008

    • Author(s)
      市川正敏
    • Organizer
      日本物理学会第63回年次大会
    • Place of Presentation
      近畿大学大学本部キャンパス
    • Year and Date
      2008-03-24
    • Related Report
      2007 Annual Research Report
  • [Presentation] Experimental Study of Lateral Phase Separation in Mulit-Compoent Membranes From the Side of Diffusion Properites2008

    • Author(s)
      M, Ichikawa, et. al.
    • Organizer
      International Workshop on Physical Pheenomena in Multi-Component Membranes
    • Place of Presentation
      首都大学東京
    • Year and Date
      2008-03-19
    • Related Report
      2007 Annual Research Report
  • [Presentation] Single Cell Manipulation by using Tilt Controlled Optical Tweezers2007

    • Author(s)
      M, Ichikawa, et. al.
    • Organizer
      2007 Inernational Symposium on Micro-NanoMechatronics and Human Science
    • Place of Presentation
      名古屋大学
    • Year and Date
      2007-11-14
    • Related Report
      2007 Annual Research Report
  • [Presentation] 脂質膜相分離系におけるドメインのダイナミクス2007

    • Author(s)
      市川正敏, 木村康之
    • Organizer
      日本物理学会 第62回年次大会
    • Place of Presentation
      北海道大学札幌キャンパス
    • Year and Date
      2007-09-24
    • Related Report
      2007 Annual Research Report
  • [Presentation] 光ピンセットを用いたinVitro細胞の向き制御2007

    • Author(s)
      市川正敏, et. al.
    • Organizer
      2007年秋季第68回応用物理学会学術講演会
    • Place of Presentation
      北海道工業大学
    • Year and Date
      2007-09-07
    • Related Report
      2007 Annual Research Report
  • [Presentation] 脂質二分子膜ベシクルにおける相分離と形態のカップリング2007

    • Author(s)
      市川正敏
    • Organizer
      特定領域若手研究者第二回ワークショップ
    • Place of Presentation
      東京農工大学
    • Year and Date
      2007-07-20
    • Related Report
      2007 Annual Research Report
  • [Presentation] Direct observation and analyses of lateral phase separation in phospholipids membrane2007

    • Author(s)
      M, Ichikawa, et. al.
    • Organizer
      International Soft Matter Conference 2007
    • Place of Presentation
      Eurogress, Aachen, Germany,
    • Related Report
      2007 Annual Research Report
  • [Presentation] Experimental study of lateral diffusion on the bilayer membrane2007

    • Author(s)
      Masatoshi, Ichikawa・Yasuyuki, Kimura
    • Organizer
      The YITP workshop onNew Frontiers in Colloidal Physics: A Bridge between Micro-and macroscpic Concepts in Soft Matter
    • Place of Presentation
      Kyoto Japan
    • Related Report
      2007 Annual Research Report
  • [Book] BOTTM-UP NANOFABRICATION: Supramolecules, Self-Assemblies, and Or ganized Films,2007

    • Author(s)
      M., Ichikawa・K., Yoshikawa,(Ed. by Katsuhiko Ariga)
    • Publisher
      American Scientific Publishers
    • Related Report
      2007 Annual Research Report
  • [Patent(Industrial Property Rights)] 光ピンセット装置2007

    • Inventor(s)
      市川正敏他3名
    • Industrial Property Rights Holder
      市川正敏他3名
    • Industrial Property Number
      2007-078314
    • Filing Date
      2007-03-26
    • Related Report
      2006 Annual Research Report

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Published: 2006-04-01   Modified: 2018-03-28  

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