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Creation of self-assembled peptide regulating inflammation and regeneration after ischemic brain stroke

Research Project

Project/Area Number 20H04528
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 90120:Biomaterials-related
Research InstitutionTokyo Medical and Dental University

Principal Investigator

Ajioka Itsuki  東京医科歯科大学, 統合研究機構, 准教授 (10348790)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2022: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2021: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2020: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Keywords超分子ペプチドゲル / サイトカイン / 脳梗塞 / 超分子ペプチド / バイオマテリアル / 損傷脳再生 / 再生医療
Outline of Research at the Start

急速な少子高齢化の進む先進諸国において、脳梗塞の治療法開発は喫緊の課題となっている。申請者らは最近、脳の潜在的再生能力を発揮させるためのバイオマテリアルを開発し、脳梗塞7日後での脳内単回投与でマウス脳梗塞モデルの運動機能回復を担うバイオマテリアル開発に成功した。しかしながら、発症1日後から7日後までに介入できる技術開発も重要視されている。そこで本研究では、損傷組織の修復を担う免疫系細胞が分泌し、逆遺伝学の介入実験で重要性が証明されているサイトカインに着目し、サイトカイン徐放性バイオマテリアルを創製し、損傷脳再生効果を検証する。

Outline of Final Research Achievements

This research focused on the anti-inflammatory cytokine IL-10, reported to promote tissue repair following an ischemic stroke via reverse genetic studies. We evaluated the recovery effect of IL-10 on sensorimotor function impairment resulting from ischemic stroke. First, we developed a jigsaw-shaped self-assembling peptide (JigSAP), a sustained-release system superior to the conventional supramolecular peptide hydrogels. We then utilized it to establish the sustained release of IL-10. In the mouse stroke model, we found that IL-10 slow-release exhibited an anti-inflammatory effect. However, contrary to expectations, the results indicated an aggravation of sensorimotor function impairment post-stroke. Our research suggests the possibility that persistent inflammation post-stroke may promote tissue repair, adding complexity to the understanding of the role of IL-10 in post-stroke recovery.

Academic Significance and Societal Importance of the Research Achievements

JigSAPは低免疫原性の短いアミノ酸からなる両親媒性ペプチドであり、タンパク質を約1週間かけて放出することのできる新規超分子ペプチドゲルであり、まずは亜急性期脳梗塞の「細胞フリー再生治療医薬品」への展開を目指す。また、炎症抑制が脳梗塞後の回復を悪化させるという本研究のデータは、炎症制御による脳梗塞治療の難しさを示した一方で、標的細胞を同定する等の今後の研究の発展によって、新たな医薬品開発につながる可能性も考えられる。

Report

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

    (13 results)

All 2023 2022 2021 2020 Other

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (11 results) (of which Int'l Joint Research: 2 results,  Invited: 9 results) Remarks (1 results)

  • [Journal Article] Efficient protein incorporation and release by a jigsaw-shaped self-assembling peptide hydrogel for injured brain regeneration2021

    • Author(s)
      Yaguchi Atsuya、Oshikawa Mio、Watanabe Go、Hiramatsu Hirotsugu、Uchida Noriyuki、Hara Chikako、Kaneko Naoko、Sawamoto Kazunobu、Muraoka Takahiro、Ajioka Itsuki
    • Journal Title

      Nature Communications

      Volume: 12 Issue: 1 Pages: 6623-6623

    • DOI

      10.1038/s41467-021-26896-3

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 蛋白質の生体内局所放出ダイナミクス制御と脳梗塞治療への展開2023

    • Author(s)
      味岡逸樹
    • Organizer
      日本化学会第103回春季年会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 損傷脳の潜在的再生能力を探る2023

    • Author(s)
      味岡逸樹
    • Organizer
      第128回日本解剖学会総会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Molecular design and development of supramolecular peptide hydrogels promoting angiogenesis after ischemic brain stroke2022

    • Author(s)
      味岡逸樹
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 異分野融合が推進するバイオマテリアルの新展開2022

    • Author(s)
      味岡逸樹
    • Organizer
      第95回日本生化学会大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Injured brain regeneration using supramolecular peptide hydrogels2022

    • Author(s)
      味岡逸樹
    • Organizer
      第60回日本生物物理学会年会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] JigSAP (jigsaw-shaped self-assembling peptide) for regenerative medicine of the subacute phase of ischemic stroke2022

    • Author(s)
      味岡逸樹
    • Organizer
      Neuro2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 超分子ペプチドの設計と脳梗塞の再生治療2021

    • Author(s)
      味岡 逸樹, 村岡 貴博, 渡辺 豪
    • Organizer
      第64回日本神経化学会大会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] VEGFを徐放する超分子ペプチドの開発と亜急性期脳梗塞の再生治療2021

    • Author(s)
      味岡 逸樹, 矢口 敦也, 押川 未央, 渡辺 豪, 村岡 貴博
    • Organizer
      第43回日本バイオマテリアル学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Viscoelasticity-modulated supramolecular peptides for regenerative medicine of ischemic stroke2021

    • Author(s)
      Itsuki Ajioka, Takahiro Muraoka, Go Watanabe
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Artificial Scaffolds Mimicking the Extracellular Environment of Developing Brain2021

    • Author(s)
      Itsuki Ajioka
    • Organizer
      the 16th Meeting of the Asian-Pacific Society for Neurochemistry
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 神経と血管の相互作用を人為操作する超分子ペプチド材料2020

    • Author(s)
      味岡 逸樹、村岡 貴博、渡辺 豪
    • Organizer
      第63回日本神経化学会大会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Remarks] 東京医科歯科大学・脳統合機能研究センター・味岡研究グループ

    • URL

      https://www.tmd.ac.jp/cbir/1/ajioka/

    • Related Report
      2020 Annual Research Report

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

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