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Pathological and molecular analysis of cerebral aneurysms using live imaging

Research Project

Project/Area Number 19K09479
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56010:Neurosurgery-related
Research InstitutionShiga University of Medical Science

Principal Investigator

Kazuhiko Nozaki  滋賀医科大学, 医学部, 教授 (90252452)

Co-Investigator(Kenkyū-buntansha) 青木 友浩  国立研究開発法人国立循環器病研究センター, 研究所, 室長 (40633144)
椎野 顯彦  滋賀医科大学, 神経難病研究センター, 准教授 (50215935)
中村 紳一朗  滋賀医科大学, 動物生命科学研究センター, 准教授 (50307980)
辻 敬一  滋賀医科大学, 医学部, 助教 (80838045)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords脳動脈瘤 / 動物モデル / 炎症 / くも膜下出血
Outline of Research at the Start

現在までの知見から脳動脈瘤が脳血管壁の慢性炎症により制御される疾患であり同時に数値流体解析結果から血流による力学的負荷により病態が修飾されることが示唆されるが、炎症という生物現象と力学的因子という二つの要素がどのように融合し脳動脈瘤発生増大、特に破裂を惹起するのかは不明である。本研究は、げっ歯類脳動脈瘤モデル動物を使用し病変部を対象としたライブイメージング解析を駆使し脳動脈瘤進展破裂を担う力学的因子と脳動脈瘤壁内の炎症をはじめとする生物現象との連関を解明することを目的とし、脳動脈瘤進展破裂予防のための新規創薬標的を見い出し、霊長類脳動脈瘤モデルの確立と連動しながら、臨床への展開を目指す。

Outline of Final Research Achievements

Dynamic characteristic motions of cerebral arterial walls and aneurysmal walls were detected using live imaging in rat aneurysmal models, and mechanical factors which promote aneurysmal rupture were analyzed. On the same aneurysmal walls, histological and molecular analysis was performed using immunohistochemical methods.
The Cerebral Artery in Cynomolgus Monkeys (Macaca fascicularis) was investigated using MR and CT images, and formalin -fixed arterial specimens were collected and anatomical features were analyzed, and 7 monkeys received surgical procedures to induce cerebral aneurysms, and 6 animals showed cerebral aneurysms in 1 and 2 years after intervention.

Academic Significance and Societal Importance of the Research Achievements

脳動脈瘤破裂によるくも膜下出血は予後不良で脳動脈瘤の進展破裂機構の解明は不十分で有効な薬物治療もない。現行の外科治療のリスクも考慮すると脳動脈瘤破裂予防を目指した先制医療としての治療介入は未だ不十分である。げっ歯類での血行力学的および分子学的解析結果から得られた候補薬物をサルモデルで検証することで、新たな薬物治療薬の開発に資する成果と思われる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (12 results)

All 2022 2021 2020 2019

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 5 results) Presentation (3 results) (of which Invited: 3 results) Book (3 results)

  • [Journal Article] The Cerebral Artery in Cynomolgus Monkeys (Macaca fascicularis)2022

    • Author(s)
      Tsuji K, Nakamura S, Aoki T, Nozaki K
    • Journal Title

      Experimental Animals

      Volume: -

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 脳動脈瘤治療の未来像2020

    • Author(s)
      野崎和彦、宮田悠、青木友浩
    • Journal Title

      脳神経外科ジャーナル

      Volume: 29 Pages: 101-108

    • NAID

      130007801704

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Dedifferentiation of smooth muscle cells in intracranial aneurysms and its potential contribution to the pathogenesis2020

    • Author(s)
      Oka M, Shimo S, Ohno N, Imai H, Abekura Y, Koseki H, Miyata H, Shimizu K, Kushamae M, Ono I, Nozaki K, Kawashima A, Kawamata T, Aoki T
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 8330-8330

    • DOI

      10.1038/s41598-020-65361-x

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Involvement of neutrophils in machineries underlying the rupture of intracranial aneurysms2020

    • Author(s)
      Kushamae M, Miyata H, Shirai M, Shimizu K, Oka M, Koseki H, Abekura Y, Ono I, Nozaki K, Mizutani T, Aoki T
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 20004-20004

    • DOI

      10.1038/s41598-020-74594-9

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Real-time imaging of an experimental intracranial aneurysm in rats.2019

    • Author(s)
      Miyata H, Shimizu K, Koseki H, Abekura Y, Kataoka H, Miyamoto S, Nozaki K, Narumiya S, Aoki T
    • Journal Title

      Neurol Med Chir (Tokyo)

      Volume: 59 Pages: 19-26

    • NAID

      130007579712

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Two Diverse Hemodynamic Forces, a Mechanical Stretch and a High Wall Shear Stress, Determine Intracranial Aneurysm Formation.2019

    • Author(s)
      Koseki H, Miyata H, Shimo S, Ohno N, Mifune K, Shimano K, Yamamoto K, Nozaki K, Kasuya H, Narumiya S, Aoki T.
    • Journal Title

      Transl Stroke Res.

      Volume: Epub ahead of print Issue: 1 Pages: 1-13

    • DOI

      10.1007/s12975-019-0690-y

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 脳動脈瘤壁情報の画像化と破裂に関わる因子の解析2020

    • Author(s)
      野崎和彦
    • Organizer
      第29回日本脳ドック学会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 脳動脈瘤治療の未来像2019

    • Author(s)
      野崎和彦
    • Organizer
      第39回日本脳神経外科コングレス総会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 病理・病態に立ち返って脳血管障害の治療を考察する2019

    • Author(s)
      野崎和彦
    • Organizer
      第59回近畿脳神経血管内手術法ワークショップ
    • Related Report
      2019 Research-status Report
    • Invited
  • [Book] 最新臨床脳卒中学(第2版)下2022

    • Author(s)
      宮田悠、青木友浩、野崎和彦
    • Publisher
      日本臨床社
    • Related Report
      2021 Annual Research Report
  • [Book] エビデンスとガイドラインに基づく脳動脈瘤とくも膜下出血2022

    • Author(s)
      野崎和彦
    • Publisher
      医学書院
    • Related Report
      2021 Annual Research Report
  • [Book] 脳神経疾患最新の治療2021-20232021

    • Author(s)
      野崎和彦
    • Publisher
      南江堂
    • Related Report
      2021 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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