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Role of epidermal growth factor receptor in early brain injury after subarachnoid hemorrhage

Research Project

Project/Area Number 21K16605
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Nakano Fumi  三重大学, 医学部附属病院, 診療等従事者 (50850731)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordsくも膜下出血 / 早期脳損傷 / Early Brain Injury / 上皮成長因子受容体 / 神経細胞アポトーシス / マウスモデル
Outline of Research at the Start

くも膜下出血(SAH)は予後不良な疾患であり、救命し得ても遅発性神経脱落症状が認められ不良な転帰を辿ることが多い。遅発性脳障害の原因として脳血管攣縮及び早期脳損傷(EBI)が考えられている。動物モデルを用いたEBIに関わる様々な機序が報告されているが全貌は解明されていない。研究代表者は以前よりSAH後の病態に様々な受容体やそのリガンドが関与することを報告してきた。その中で上皮成長因子受容体(EGFR)に着目し、EGFRがEBIに関与するという仮説を立てた。本研究ではマウスSAHモデルを用いてEGFRがSAH後のEBIの中でも特に神経細胞死に関与するかどうかを検討する。

Outline of Final Research Achievements

Subarachnoid hemorrhage (SAH) is a devastating disease which affecting relatively young people. Cerebral vasospasm and early brain injury (EBI) have been suggested to contribute to delayed cerebral ischemia (DCI) after SAH. EBI, such as neuronal apoptosis, has not been fully investigated. In this study, we investigated whether epidermal growth factor receptor (EGFR) activation results in neuronal apoptosis and sought signaling pathways under EGFR activation in a mouse SAH model.
SAH mouse showed deteriorated neurological function, brain edema, increased neuronal apoptosis, and these observations were improved in SAH-EGFR inhibitor group. Western blot and immunohistochemistry revealed that expressions of phosphorylated (p-) EGFR, nuclear factor-kappa B (NFkB) inducing kinase (NIK) in the nucleus, NFkB were increased in neurons of the SAH group, and decreased in the SAH-EGFR inhibitor group. EGFR/NIK/NFkB is suggested to be involved in neuronal apoptosis after SAH in mice.

Academic Significance and Societal Importance of the Research Achievements

SAH患者の30-40%でDCIが生じ、これが脳梗塞へと発展すると転帰不良の原因となる。
本研究結果は、DCIへ至る原因の一つである神経細胞アポトーシスに関して、EGFRの活性化及びその下流にnuclear factor (NF)-kappa B inducing kinase (NIK)/NF-kappaB経路が働くことを示している。これにより、将来的にはEGFRを分子標的とした新しいEBI治療法の開発、そして予後の改善へと発展していくことが期待される。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (4 results)

All 2023 2022

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results) Presentation (1 results)

  • [Journal Article] Anti-Apoptotic Effects of AMPA Receptor Antagonist Perampanel in Early Brain Injury After Subarachnoid Hemorrhage in Mice2023

    • Author(s)
      Kawakita F, Nakano F, Kanamaru H, Asada R, Suzuki H
    • Journal Title

      Transl Stroke Res

      Volume: - Pages: 462-475

    • DOI

      10.1007/s12975-023-01138-4

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Epidermal growth factor receptor mediates neuronal apoptosis after subarachnoid hemorrhage in mice2023

    • Author(s)
      Fumi Nakano, Hideki Kanamaru, Fumihiro Kawakita, Lei Liu, Yoshinari Nakatsuka, Hirofumi Nishikawa, Takeshi Okada and Hidenori Suzuki
    • Journal Title

      Stroke

      Volume: -

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Old but still hot target, glutamate-mediated neurotoxicity in stroke.2022

    • Author(s)
      Hidenori Suzuki, Fumihiro Kawakita, Reona Asada, Fumi Nakano, Hirofumi Nishikawa, Masashi Fujimoto
    • Journal Title

      Translational Stroke Research

      Volume: 13 Issue: 2 Pages: 216-217

    • DOI

      10.1007/s12975-021-00958-6

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] マウスくも膜下出血モデルにおける上皮成長因子受容体阻害剤の神経アポトーシス抑制効果の検討2022

    • Author(s)
      中野芙美、金丸英樹、川北文博、Liu Lei、中塚慶徳、西川拓文、岡田健、芝真人、鈴木秀謙
    • Organizer
      第22回日本分子脳神経外科学会
    • Related Report
      2022 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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