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Development of a new experimental model of chronic cerebral ischemia with vascular endothelial impairment and elucidation of hyperperfusion following vascular reconstruction

Research Project

Project/Area Number 18K08934
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56010:Neurosurgery-related
Research InstitutionAkita University

Principal Investigator

Shimizu Hiroaki  秋田大学, 医学系研究科, 教授 (20506638)

Co-Investigator(Kenkyū-buntansha) 新妻 邦泰  東北大学, 医工学研究科, 教授 (10643330)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords慢性脳虚血 / 慢性脳低灌流 / 血行再建 / 過灌流 / ラット / 再灌流 / 動脈内皮障害 / エストロゲン / 慢性脳虚血後過灌流モデル / 血管内皮障害
Outline of Final Research Achievements

A rat model of hyperperfusion after vascular reconstruction on chronic cerebral ischemia was investigated, however, laser speckle flowmetry (LAF) provided unreliable cerebral blood flow results. Proper conditions to bring stable LSF results were then explored and several factors such as body temperature, blood pressure, head fixation, and settled condition of craniotomy site for LSF measurement were found to be important. These conditions were applied to the model, which finally demonstrated hyperperfusion reproducibly.

Academic Significance and Societal Importance of the Research Achievements

これまでlaser speckle flowmetry (LSF)はしばしば脳血流測定のツールとして使用されてきた。レーザー光の反射を観察する原理から、測定結果には脳血流変動以外の様々な因子が影響する可能性があるが、それらに関する検討は乏しかった。今回、変動要因を検討しその対策を明らかにできたことで、LSFを用いたすべての研究の精度、再現性の向上に役立つと考えられる。実際、我々もこの方法を適用して慢性虚血の血行再建後の過灌流についても再現性のよい研究が可能となった。LSFを用いた様々な脳血流研究を通じ、脳外科的手術の安全性向上、慢性脳虚血と認知症の関係などの研究に貢献するものと考えられる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (14 results)

All 2020 2019

All Journal Article (6 results) (of which Peer Reviewed: 4 results) Presentation (6 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Book (2 results)

  • [Journal Article] Potential Approaches to overcome Problems related to Cerebral Aneurysms2020

    • Author(s)
      清水宏明
    • Journal Title

      Japanese Journal of Neurosurgery

      Volume: 29 Issue: 1 Pages: 4-9

    • DOI

      10.7887/jcns.29.4

    • NAID

      130007790279

    • ISSN
      0917-950X, 2187-3100
    • Related Report
      2020 Annual Research Report
  • [Journal Article] 静脈グラフトを用いた high flow バイパス術2020

    • Author(s)
      富樫俊太郎,柳澤 俊晴,清水 宏明
    • Journal Title

      脳卒中の外科

      Volume: 48 Issue: 4 Pages: 265-269

    • DOI

      10.2335/scs.48.265

    • NAID

      130007904717

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Optimal Timing of Extracranial-Intracranial Bypass with Microsurgical Trapping for Ruptured Blister Aneurysms of the Internal Carotid Artery.2020

    • Author(s)
      Endo H, Fujimura M, Shimizu H, Endo T, Omodaka S, Inoue T, Sato K, Niizuma K, Tominaga T.
    • Journal Title

      World Neurosurg

      Volume: 136 Pages: e567-e577

    • DOI

      10.1016/j.wneu.2020.01.081

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Rapid <i>de novo</i> Formation of a Large Aneurysm in a Patient with Fibromuscular Dysplasia2020

    • Author(s)
      Suda Y,Kokubun K,Takahashi Y,Saito A,Wakasa R,Shimizu H
    • Journal Title

      Journal of Neuroendovascular Therapy

      Volume: 14 Issue: 2 Pages: 69-75

    • DOI

      10.5797/jnet.cr.2019-0075

    • NAID

      130007800775

    • ISSN
      1882-4072, 2186-2494
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Endovascular Stenting Following Stereotactic Radiosurgery for Meningioma Involving the Superior Sagittal Sinus2020

    • Author(s)
      Takahashi Y, Suda Y, Fushimi S, Shibata K, Kondo R, Oda Mm Shimizu H
    • Journal Title

      Journal of Neuroendovascular Therapy

      Volume: 14 Issue: 7 Pages: 273-278

    • DOI

      10.5797/jnet.cr.2020-0048

    • NAID

      130007878524

    • ISSN
      1882-4072, 2186-2494
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Utility of Near-infrared Spectroscopy Monitoring in the Management of Hyperperfusion Syndrome after Intracranial Carotid Artery Stenting2020

    • Author(s)
      Togashi S, Shimizu H, Suda Y.
    • Journal Title

      NMC Case Report Journal

      Volume: 7 Issue: 4 Pages: 223-227

    • DOI

      10.2176/nmccrj.cr.2020-0003

    • NAID

      130007921602

    • ISSN
      2188-4226
    • Related Report
      2020 Annual Research Report
  • [Presentation] 進行性脳梗塞を呈し緊急CASを施行した放射線治療後頚部頚動脈狭窄症の1例2020

    • Author(s)
      富樫俊太郎,高橋佑介,鈴木隼士,畠愛子,中瀬泰然,清水宏明
    • Organizer
      第63回日本脳循環代謝学会学術集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Surgery for recurrent aneurysms at the site of previous clipping or coiling2020

    • Author(s)
      Shimizu H.
    • Organizer
      WFNS Foundation ACNS Nepal and Vietnam Joint Seminar
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] An experimental model of hyperperfusion following chronic cerebral ischemia in rats: effect of estrogen deficiency and hypertension2019

    • Author(s)
      Hatakeyama J,Furuyama Y,Niizuma K,Tominaga T,Shimizu H
    • Organizer
      第29回国際脳循環代謝学会総会(Brain&BrainPET 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] A rat model of venous sinus occlusion; impact on cerebral blood flow2019

    • Author(s)
      Hamasaki R,Shimizu H,Niizuma K,Tominaga T
    • Organizer
      第29回国際脳循環代謝学会総会(Brain&BrainPET 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 虚血性脳血管障害の手術とその背景2019

    • Author(s)
      清水宏明
    • Organizer
      弟5回 Neurosurgery Seminar in 道東
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] An experimental model of hyperperfusion following chronic cerebral ischemia in rats: effect of estrogen deficiency and hypertension.2019

    • Author(s)
      Junya Hatakeyama, Yosuke Furuyama, Kuniyasu Niizuma, Teiji Tominaga, Hiroaki Shimizu
    • Organizer
      BRAIN & BRAIN PET 2019
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Book] 脳卒中の外科 編集:井川 房夫、黒田 敏、清水 宏明2020

    • Author(s)
      清水 宏明
    • Total Pages
      296
    • Publisher
      メジカルビュー社
    • ISBN
      9784758318525
    • Related Report
      2020 Annual Research Report
  • [Book] 今日の診断指針 デスク判 第8版 永井良三(総編集)2020

    • Author(s)
      清水宏明
    • Total Pages
      2114
    • Publisher
      医学書院
    • ISBN
      9784260038089
    • Related Report
      2020 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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