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Analysis of induced iNSPCs within the ischemic area and neural regeneration mechanism using transgenic mice

Research Project

Project/Area Number 19K16934
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 51030:Pathophysiologic neuroscience-related
Research InstitutionHyogo Medical University

Principal Investigator

Doi Akiko  兵庫医科大学, 医学部, 助教 (70793321)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords脳梗塞 / 脳傷害誘導性神経幹細胞 / 傷害誘導性神経幹細胞 / ペリサイト / 神経再生
Outline of Research at the Start

我々は脳梗塞病態時に特異的に誘導され、神経再生機構の鍵を握る新規幹細胞(脳傷害誘導性神経幹細胞:injury induced-Neural Stem/Progenitor Cells, iNSPCs)を発見し、これまでにiNSPCsがin vitroにおいては活動電位を有する機能的な神経に分化することを報告してきた。本研究ではiNSPCs及びその起源と考えられるペリサイトに発現する遺伝子のプロモーター調節下にCreリコンビナーゼを発現する遺伝子改変マウスを用い、脳梗塞病態下のiNSPCs/ペリサイトの生体内動態とその神経への分化能を検討し、iNSPCsを中心とした神経再生機構の解明を目指す。

Outline of Final Research Achievements

Accumulating evidence reveals that endogenous neural stem/progenitor cells (NSPCs) are activated under pathological conditions, such as stroke. To elucidate the localization of these cells, researchers have created genetically modified mice wherein the neural stem cell marker, Nestin, is labeled with a green fluorescent protein (Nestin-GFP mice).
Immunohistochemical analysis of Nestin-GFP (CB-17 line) mice revealed that GFP was expressed not only in the subventricular zone (SVZ), a well-known neurogenic region of the brain, but also in the infarct region. Neurospheres, a hallmark of NSPCs, were formed from both tissues after the isolation and culture of the SVZ and infarcted regions, respectively. They differentiated into various neural lineages, including neuronal cells, astrocytes, and oligodendrocytes. However, PCR analysis revealed that NSPCs from the SVZ and infarcted region had distinct characteristics, implying that these cells have a distinct origin.

Academic Significance and Societal Importance of the Research Achievements

本研究においては脳梗塞巣内に生じるiNSPCsは成体脳にもともと存在するSVZ由来神経幹細胞と異なる起源や特性を持つことが示唆された。iNSPCs元来壊死巣と呼ばれていた組織由来であり、そこから発生する細胞のトレースに成功した。また、本研究により樹立したNestin-GFP組換えマウス(CB-17 系統)は、再現性や生存率が高いことから、脳梗塞病態時において、神経幹細胞を起点とした組織修復及び神経再生機構の解明や評価に極めて有用なツールとなり得ると考えられる。

Report

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

    (5 results)

All 2021 2020

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (4 results)

  • [Journal Article] Establishment of a Reproducible Ischemic Stroke Model in Nestin-GFP Mice with High Survival Rates2021

    • Author(s)
      Nishie Hideaki、Nakano-Doi Akiko、Sawano Toshinori、Nakagomi Takayuki
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 23 Pages: 12997-12997

    • DOI

      10.3390/ijms222312997

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Cell density is a key factor for the expansion of ischemia-induced multipotent stem cells2021

    • Author(s)
      湊雄介、土居亜紀子、大谷佐知、前田誠司、松山知弘、中込隆之、八木秀司
    • Organizer
      第44回神経科学大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 脳梗塞病態時における脳組織がミクログリアの特性に与える影響に関する検討2021

    • Author(s)
      新田美歩、土居亜紀子、中込隆之
    • Organizer
      第64回日本脳循環代謝学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] CD44 is expressed both in ischemia-induced multipotent stem cells and their niches microglia/macrophages, after ischemic stroke in mice.2020

    • Author(s)
      土居 亜紀子
    • Organizer
      第43回神経科学大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 脳梗塞後の組織修復過程におけるCD44発現の検討2020

    • Author(s)
      土居 亜紀子
    • Organizer
      第63回日本脳循環代謝学会学術集会
    • Related Report
      2020 Research-status Report

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

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