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Elucidation of molecular mechanisms underlying neuron-microglia interaction in neural circuit dysfunction induced by neonatal seizures

Research Project

Project/Area Number 21K15272
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 47040:Pharmacology-related
Research InstitutionKyushu University

Principal Investigator

Kasahara Yuka  九州大学, 医学研究院, 特任助教 (50838208)

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: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords神経細胞 / ミクログリア / てんかん / 発達期 / 熱性けいれん
Outline of Research at the Start

乳幼児期の熱性けいれんは、神経回路変性を伴い、将来の脳機能障害やてんかんの発病に寄与すると示唆されている。しかし、神経回路変性に至る機序の詳細は不明であり、これをターゲットとした治療法は確立されていない。本研究ではミクログリア連関に着目し、組織化学的、遺伝学的、薬理学的手法を用いることで、熱性けいれんに伴う神経回路変性における分子細胞生物学的メカニズムの解明を目指す。

Outline of Final Research Achievements

Convulsive disorders frequently occur in infants and young children, and have been suggested to contribute to future brain dysfunction. The long-term effects are thought to be due to neural circuit degeneration. However, the mechanisms underlying neural circuit degeneration remain unknown. In this project, I focused on the Neuronal hyperexcitability and microglial activation in the epileptic brain, and hypothesized that ``excessively excited neurons induce activation of microglia, resulting in neural circuit degeneration.'' I made the neonatal epilepsy model mouse, confirmed that neuronal hyperexcitability and microglial activation occured, and investigated their association.

Academic Significance and Societal Importance of the Research Achievements

けいれん性疾患は、乳幼児にとって最も一般的な中枢神経疾患である。しかし、その発症機序や発症により生じる影響の全容は、今日まで解明されていない。本研究によって遂行される、小児てんかんにおける神経回路変性の分子細胞生物学的メカニズムの解明は、新規治療ターゲットの発見に繋がることが期待できる。さらに、本研究で着眼するミクログリアの活性化は、様々な中枢神経疾患においても報告されている。本研究により明らかとなる分子機構は、他の疾患においても共通の治療ターゲットとなる可能性を秘めている。

Report

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

    (5 results)

All 2023 2022

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

  • [Journal Article] Seizure-induced hilar ectopic granule cells in the adult dentate gyrus2023

    • Author(s)
      Kasahara Yuka、Nakashima Hideyuki、Nakashima Kinichi
    • Journal Title

      Frontiers in Neuroscience

      Volume: 17 Pages: 1150283-1150283

    • DOI

      10.3389/fnins.2023.1150283

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] L-DOPA-Induced Neurogenesis in the Hippocampus Is Mediated Through GPR143, a Distinct Mechanism of Dopamine.2022

    • Author(s)
      Kasahara Y, Masukawa D, Kobayashi K, Yamasaki M, Watanabe M, Goshima Y.
    • Journal Title

      Stem Cells.

      Volume: 40 Issue: 2 Pages: 215-226

    • DOI

      10.1093/stmcls/sxab013

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] L-DOPA and its receptor GPR143 are involved in hippocampal neurogenesis and mood regulation.2022

    • Author(s)
      Kasahara Yuka, Masukawa Daiki, Kobayashi Kenta, Goshima Yoshio
    • Organizer
      Society for Neuroscience 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Kasahara Yuka, Masukawa Daiki, Kobayashi Kenta, Goshima Yoshio2022

    • Author(s)
      L-DOPA promotes neurogenesis in the Hippocampus via its receptor, GPR143.
    • Organizer
      NEURO2022
    • Related Report
      2022 Research-status Report
  • [Presentation] Kasahara Yuka, Masukawa Daiki, Kobayashi Kenta, Goshima Yoshio2022

    • Author(s)
      L-DOPA and its receptor GPR143 are involved in hippocampal neurogenesis and mood regulation.
    • Organizer
      成体脳ニューロン新生懇談会
    • Related Report
      2022 Research-status Report

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

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