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Reversible encapsulation of exosomes for single particle analysis

Research Project

Project/Area Number 20H02581
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 28040:Nanobioscience-related
Research InstitutionThe University of Tokyo

Principal Investigator

Ejima Hirotaka  東京大学, 大学院工学系研究科(工学部), 准教授 (00724543)

Co-Investigator(Kenkyū-buntansha) 重藤 真介  関西学院大学, 理学部, 教授 (10756696)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2023: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2022: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2021: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2020: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Keywords細胞外小胞 / 金属-ポリフェノール錯体 / エクソソーム / ポリドーパミン
Outline of Research at the Start

エクソソームは様々な細胞が分泌する細胞外小胞であり、薬物送達キャリアや体液診断におけるマーカーとしての医療応用が期待されている。しかし、エクソソームは極小サイズの粒子であるため単一粒子分析が難しく、多数の粒子の平均化された情報を元に研究される場合が多い。本研究では、独自の分子技術を用いて、エクソソーム単一粒子を被包化する。被覆膜に信号増強能を持たせることで、高感度な単一粒子解析手法を確立し、エクソソームの個性解明に迫る。

Outline of Final Research Achievements

Exosomes are extracellular vesicles approximately 100 nm in diameter that are secreted by various cells. They are expected to have applications in drug delivery and liquid biopsy, but their handling is difficult due to their extremely small particle size and unstable nature of lipid-bilayer membranes. This study demonstrated that it is possible to stabilize exosomes by coating them with metal-phenolic network. Additionally, a method was established to densely modify the coating layer with gold nanoparticles. From the gold nanoparticle-bearing exosomes, it was possible to obtain Raman spectra derived from single particles. Since differences were observed even in spectra derived from exosomes purified from the same cell line, this technique is considered effective for analyzing the diversity of exosomes.

Academic Significance and Societal Importance of the Research Achievements

エクソソームは細胞から細胞へ物質を届けている天然のナノキャリアであるから、この機能をハイジャックして人工的な薬物送達キャリアへと改変することは将来的に有望である。薬物送達や体液診断などの医療応用の実現にむけて、特にエクソソームが不安定であることが課題となっている。本研究ではエクソソームを被覆することで安定性を向上し、また簡単な操作で脱被覆して元のエクソソームに戻すことができる手法を開発した。本研究で開発した手法は特別な装置を用いずに実現可能であるから、安定性や分析手法が不足しているエクソソームの研究において広く利用されることが期待される。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (6 results)

All 2023 2022 2021

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (2 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Using phenolic polymers to control the size and morphology of calcium carbonate microparticles2023

    • Author(s)
      Yurie Nakanishi, Bohan Cheng, Joseph J. Richardson, Hirotaka Ejima
    • Journal Title

      RSC Advances

      Volume: 13 Issue: 43 Pages: 30539-30547

    • DOI

      10.1039/d3ra04791a

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Tannic acid-inspired star polymers for functional metal-phenolic networks with tunable pore sizes2022

    • Author(s)
      Bohan Cheng, Sifan Lu, Wenting Liao, Chenyu Wang, Joseph J. Richardson, Hirotaka Ejima
    • Journal Title

      Nanoscale

      Volume: 14 Issue: 39 Pages: 14466-14470

    • DOI

      10.1039/d2nr02682a

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Rapid assembly of colorless antimicrobial and anti-odor coatings from polyphenols and silver2022

    • Author(s)
      Joseph J. Richardson, Wenting Liao, Jincai Li, Bohan Cheng, Chenyu Wang, Taku Maruyama, Blaise L. Tardy, Junling Guo, Lingyun Zhao, Wanping Aw, Hirotaka Ejima
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 2071-2071

    • DOI

      10.1038/s41598-022-05553-9

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Polydopamine‐Mediated Surface Functionalization of Exosomes2021

    • Author(s)
      Chenyu Wang, Kenta Kimura, Jincai Li, Joseph Jacob Richardson, Mitsuru Naito, Kanjiro Miyata, Takanori Ichiki, Hirotaka Ejima
    • Journal Title

      ChemNanoMat

      Volume: - Issue: 6 Pages: 592-595

    • DOI

      10.1002/cnma.202100078

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] Polydopamine-mediated surface functionalization of extracellular vesicles2022

    • Author(s)
      Chenyu Wang, Hirotaka Ejima
    • Organizer
      第17回ナノ・バイオメディカル学会大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Adsorption and adhesion properties of bioinspired polyphenolic molecules2021

    • Author(s)
      Hirotaka Ejima
    • Organizer
      The 48th IUPAC World Polymer Congress
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited

URL: 

Published: 2020-04-28   Modified: 2025-01-30  

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