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Development of the ion channel screening system by the hybrid use of AFM and Galvanometer

Research Project

Project/Area Number 20K15153
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 28050:Nano/micro-systems-related
Research InstitutionThe University of Tokyo

Principal Investigator

Sugiura Hirotaka  東京大学, 大学院工学系研究科(工学部), 助教 (10844805)

Project Period (FY) 2020-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
KeywordsMEMS / microfluidics / force sensor / micro-TAS / 水晶振動子 / microTAS / 膜タンパク / AFM / 脂質二重膜 / イオンチャネル / electrophysiology
Outline of Research at the Start

本研究は,AFMおよびイオン電流計測の統合にもとづく創薬標的イオンチャネルの解析システムを開拓する.近年,創薬標的となるイオンチャネルを評価するスクリーニング手法が発達している.しかしながら,実験プロトコルやイオンチャネルの動態そのものに不確定性が大きく,光学顕微鏡による観察も難しいことから,実験の正確性,再現性の向上が課題となっている.そこで, (I)環状配置電極によりイオンチャネルの存在位置を探索する機構,(II)原子間力顕微鏡(AFM)によりイオンチャネルの状態を可視化する機構を統合した新手法を提案する.これにより,偽陽性検出リスクの抑制や,複雑なイオンチャネルの動態解析が可能となる.

Outline of Final Research Achievements

In this study, we introduced ion channels such as membrane proteins into a microfluidic device with a lipid bilayer membrane for drug screening of ion channels, detected the characteristics of ion channels and their spatial location on the device with a specific current detector, and investigated the elemental technology of the device that enables simultaneous scanning of ion channel states with AFM. For the microfluidic device, we realized a stable means of forming lipid bilayers without organic solvent contamination. We have also realized a method for the forced introduction of membrane proteins using dielectrophoresis. A proof-of-principle demonstration of the ion channel characterization and spatial position sensing device was completed. A highly sensitive cantilever for AFM scanning of ion channels was realized.

Academic Significance and Societal Importance of the Research Achievements

本研究は,AFMおよびイオン電流計測の統合にもとづく創薬標的イオンチャネルの解析システムを開拓する.近年,in-vitro系に細胞膜環境を再現することで,創薬標的となるイオンチャネルを評価するスクリーニング手法が発達している.しかしながら,実験プロトコルやイオンチャネルの動態そのものに不確定性が大きく,光学顕微鏡による観察も難しいことから,実験の正確性,再現性の向上が課題となっている.本研究より,偽陽性検出リスクの抑制や,複雑なイオンチャネルの動態解析が可能となる.これは,とりわけ化学受容性評価に正確性を要するイオンチャネル創薬の領域で 必要不可欠な基盤技術となる.

Report

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

    (6 results)

All 2022 2021 2020

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (5 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Stiffness measurement of organoids using a wide-range force sensor probe fabricated using a quartz crystal resonator2022

    • Author(s)
      Shiro Watanabe, Hirotaka Sugiura and Fumihito Arai
    • Journal Title

      IEEE Robotics and Automation Letter

      Volume: 7 Issue: 2 Pages: 2535-2540

    • DOI

      10.1109/lra.2022.3144766

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Stiffness measurement of organoids using a wide-range force sensor probe fabricated using a quartz crystal resonator2022

    • Author(s)
      Shiro Watanabe, Hirotaka Sugiura and Fumihito Arai
    • Organizer
      International Conference on Robotics and Automations(ICRA)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 3軸水晶振動式力センサの差動平衡化と電気生理学への応用2021

    • Author(s)
      杉浦広峻, 渡邉史朗, 新井史人
    • Organizer
      日本機械学会 ロボティクスメカトロニクス講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Wide-range force sensor probe using quartz crystal resonator2021

    • Author(s)
      Shiro Watanabe, Hirotaka Sugiura and Fumihito Arai
    • Organizer
      International Symposium on Micro/nano mechatronics and Human Science (MHS)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 誘電泳動力を用いた平面脂質平面膜に対する高速リポソーム導入2020

    • Author(s)
      杉浦広峻,大崎寿久,三村久敏,山田哲也,竹内昌治
    • Organizer
      日本機械学会 ロボティクスメカトロニクス講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] Dielecrophoretic introduction of the membrane proteins into the BLM platforms for the electrophygiological analysis systems2020

    • Author(s)
      HirotakaSugiura, Toshihisa Osaki, Hisatoshi Mimura, Tetsuya Yamada, Shoji Takeuchi
    • Organizer
      International Conference on intelligent robotics and systems (IROS) 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2023-01-30  

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