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Development of an electrochemiluminescence microscopy to visualise biomembrane functions

Research Project

Project/Area Number 22K20551
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0502:Inorganic/coordination chemistry, analytical chemistry, inorganic materials chemistry, energy-related chemistry, and related fields
Research InstitutionTohoku University

Principal Investigator

Hiramoto Kaoru  東北大学, 学際科学フロンティア研究所, 助教 (40963038)

Project Period (FY) 2022-08-31 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords電気化学発光 / 脂質二分子膜 / イメージング / 人工脂質二重膜
Outline of Research at the Start

生命において物質・情報伝達のやり取りの場となるのが脂質二重膜であり、そこで生じる分子の衝突や取り込みなどのイベントを可視化する技術の構築は、生命現象の基礎的な理解においても、新しいバイオ素子の応用展開においても重要である。本研究では、電極上に再構築した人工脂質二重膜を基盤として、電気化学発光現象を利用して膜イベントを検出するイメージング手法を開発する。電気化学発光は電極反応がトリガとなる発光現象であり、電極‐溶液界面の状態を高感度に反映した情報が得られる。電流情報と光学系での位置検出の組み合わせによりモデル膜の新規解析手法の構築を目指す。

Outline of Final Research Achievements

In this study, a system for imaging the formation of lipid bilayers using electrochemiluminescence microscopy was constructed. Phospholipids were deposited on a flat electrode, and surface observation by electrochemiluminescence of ruthenium-bipyridine complexes and tripropylamine through the lipid bilayer was observed. The voltage-dependent luminescence could be observed repeatedly even after multiple voltage sweeps, which may be due to the redox reaction of the ruthenium complex. Furthermore, when the constituent lipids were changed to anionic, neutral or cationic, the potential at which luminescence occurred also shifted to the oxidative side, suggesting that the electrostatic interaction between the ruthenium complex and the lipid membrane altered the appearance of the lipid membrane. Thorough the study, a novel label-free lipid membrane imaging system was constructed.

Academic Significance and Societal Importance of the Research Achievements

支持脂質二分子膜は細胞膜を人工的に基板上に再構成したものであり、生命・病理に関わる細胞膜の機能を解明するための有望な分子モデル系として認識されている。生体膜の重要な要素として電気容量や抵抗が挙げられるが、これらの電気的特性を計測する手法はあるものの同時に脂質膜の平面空間情報膜を得ることは困難なため、膜機能のより深い理解と幅広い応用が制限されてきた。本研究では膜表面を電気化学的に直接観察する新たな手法として電気化学発光顕微鏡を開発し、電圧依存的に変化する発光検出システムを構築した。本研究成果により脂質膜の物理化学的特性評価と表面観察が同時に行えるようになり、生体膜研究の推進が期待できる。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (11 results)

All 2024 2023 2022

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (8 results) (of which Int'l Joint Research: 3 results,  Invited: 3 results)

  • [Journal Article] Optical properties of ultrathin biohybrid membranes: implications for optoelectronic applications2024

    • Author(s)
      T. Ma, K. Watabe, M. Komiya, K. Hiramoto, X. Feng, D. Tadaki, A. Hirano-Iwata
    • Journal Title

      ACS Applied Nano Materials

      Volume: - Issue: 16 Pages: 0-0

    • DOI

      10.1021/acsanm.3c04080

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Osteogenic differentiation of mesenchymal stem cell spheroids: A microfluidic device and electrochemiluminescence imaging study2024

    • Author(s)
      K. Hiramoto A. Konno Y. Nashimoto A. Hirano-Iwata K. Ino H. Shiku
    • Journal Title

      Electrochimica Acta

      Volume: 491 Pages: 144291-144291

    • DOI

      10.1016/j.electacta.2024.144291

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evaluation of respiratory and secretory activities of multicellular spheroids via electrochemiluminescence imaging2023

    • Author(s)
      K. Hiramoto, K. Komatsu, R. Shikuwa, A. Konno, Y. Sato, A. Hirano-Iwata, K. Ino, H. Shiku
    • Journal Title

      Electrochimica Acta

      Volume: 458 Pages: 142507-142507

    • DOI

      10.1016/j.electacta.2023.142507

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Presentation] Developing electrochemiluminescence imaging method for the study of supported lipid bilayers2023

    • Author(s)
      K. Hiramoto K. Ino A. Hirano-Iwata and H. Shiku
    • Organizer
      International Society of Electrochemistry 74th Annual Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] On the use of Electrochemiluminescence Microscopy: keys to visualizing biological phenomena2023

    • Author(s)
      K. Hiramoto
    • Organizer
      International Virtual Nanopore Weekly Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 細胞活性測定のための電気化学インターフェース2023

    • Author(s)
      平本薫
    • Organizer
      Chem-Bio Joint Seminar 2023
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Electrochemical measurement techniques for the evaluation of 3D cell models2023

    • Author(s)
      K. Hiramoto
    • Organizer
      日本表面真空学会学術講演会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 脂質二分子膜の新規電気化学発光イメージング2023

    • Author(s)
      平本薫 伊野浩介 平野愛弓 珠玖仁
    • Organizer
      化学とマイクロ・ナノシステム学会第48回研究会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 電気化学発光イメージングによる細胞分泌活動の観察2023

    • Author(s)
      平本薫, 伊野浩介, 宿輪諒太, 平野愛弓, 珠玖仁
    • Organizer
      電気化学会第90回大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 電気化学発光による細胞機能の可視化2023

    • Author(s)
      平本薫
    • Organizer
      令和4年度共同プロジェクト研究発表会
    • Related Report
      2022 Research-status Report
  • [Presentation] Electrochemiluminescence Imaging of Respiratory Activity and Cellular Secretion of Three-Dimensional Cultured Cells2022

    • Author(s)
      Kosuke Ino, Kaoru Hiramoto, Keika, Komatsu, Yuji Nashimoto, Hitoshi Shiku
    • Organizer
      73rd Annual Meeting of the International Society of Electrochemistry
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research

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Published: 2022-09-01   Modified: 2025-01-30  

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