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The involvement of neural stem cells in promoting elimination of pain-fear memory by lamotrigine

Research Project

Project/Area Number 18K07390
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 51030:Pathophysiologic neuroscience-related
Research InstitutionShiga University of Medical Science

Principal Investigator

Koyama Natsu  滋賀医科大学, 医学部, 准教授 (50135464)

Co-Investigator(Kenkyū-buntansha) 中西 美保  滋賀医科大学, 医学部, 助教 (40382048)
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: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsラモトリギン / 恐怖回避モデル / 神経幹細胞 / ニューロスフェア / Brdu / 恐怖記憶の消去 / 気分安定薬 / 神経新生 / BrdU / オープンフィールドテスト / 恐怖条件付けテスト / ニューロスフェアアッセイ / 痛み / 恐怖記憶 / 記憶の消去
Outline of Final Research Achievements

The effects of lamotrigine, an anticonvulsant drug with mood stabilizing effect, on the self-renewability of neural stem cell and on the fear memory were analyzed. In vitro analysis of self-renewability by neurosphere assay of the periventricular region showed increased proliferation of cell masses in a lamotrigine dose-dependent manner. In vivo analysis by the BrdU method also showed that administration of lamotrigine for 12 weeks amplified the progenitor pool producing new neurons in the subependymal zone: SEZ and subgranular zone: SGZ of the hippocampal dentate gyrus. In the fear conditioning test, fear responsiveness during associative learning was enhanced, but no enhancement of fear memory was observed. These results suggest that the enhancement of self-renewability of neural stem cell by lamotrigine may prevent excessive fear response.

Academic Significance and Societal Importance of the Research Achievements

慢性痛を訴える成人は、意外なことに働き盛りの世代で最も多く、慢性痛による経済的損失を減少させるために、慢性痛のメカニズムを解明する研究は重要である。「恐怖回避モデル」が背景にある慢性の痛みに対しては、痛みに対する過剰な恐怖記憶の鎮静化が治療において重要となると考えられる。気分安定薬作用のあるラモトリギンによる、神経幹細胞の事項複製能の促進作用と恐怖記憶の鎮静化作用が確認されれば、副作用の出ない用量でのラモトリギンの投与は、難治性の慢性痛に対して行われる運動療法と心理療法の効果を促進させる可能性が予想される。

Report

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

    (12 results)

All 2021 2020 2019 2018

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 2 results,  Invited: 3 results) Book (2 results)

  • [Journal Article] Early maternal and social deprivation expands neural stem cell population size and reduces hippocampus/amygdala-dependent fear memory2020

    • Author(s)
      Daun KA, Fuchigami T, Koyama N, Maruta N, Ikenaka K, Hitoshi S
    • Journal Title

      Front Neurosci

      Volume: 14 Pages: 22-22

    • DOI

      10.3389/fnins.2020.00022

    • NAID

      120006797557

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 脊髄の上行性伝導路と局所回路2019

    • Author(s)
      小山なつ
    • Journal Title

      Clinical Neuroscience

      Volume: 37 Pages: 650-652

    • Related Report
      2019 Research-status Report
  • [Journal Article] 痛みの基礎知識2019

    • Author(s)
      小山なつ
    • Journal Title

      臨床化学

      Volume: 48 Pages: 197-202

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] 急性痛と慢性痛の基礎知識2018

    • Author(s)
      小山なつ
    • Journal Title

      理療

      Volume: 48 Pages: 21-25

    • Related Report
      2018 Research-status Report
  • [Presentation] 条件付け恐怖の消去学習とWEBによる痛み関連学習に関する話題2021

    • Author(s)
      小山なつ
    • Organizer
      生理学研究所痛み研究会. 2020
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Effects of voluntary wheel running on conditioned fear learning and extinction learning2020

    • Author(s)
      Kitagawa H, Nakaji K, Daun K、Kuroda A, Koyama N, Hitoshi S
    • Organizer
      第97回 日本生理学会大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 行性疼痛抑制を再考する2020

    • Author(s)
      小山なつ
    • Organizer
      日本ペインクリニック学会第54回学術集会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] MOOD STABILIZING DRUGS ACTIVATE ADULT NEURAL STEM CELLS-NEUROGENESIS SYSTEM2019

    • Author(s)
      Keita Nakaji, Natsu Koyama, Takahiro Fuchigami, Seiji Hitoshi
    • Organizer
      The International Society for Neurochemistry (ISN)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 基礎からみた感覚障害2019

    • Author(s)
      小山なつ
    • Organizer
      第24回日本口腔顔面痛学会学術集会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Mood stabilizing drugs activate adult neural stem cell-neurogenesis system2019

    • Author(s)
      Keita Nakaji, Natsu Koyama, Fuchigami, Seiji Hitoshi
    • Organizer
      第9回アジア・オセアニア生理学会連合大会(FAOPS2019)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Book] 疼痛医学2020

    • Author(s)
      小山なつ(分担執筆)
    • Total Pages
      382
    • Publisher
      医学書院
    • ISBN
      9784260040839
    • Related Report
      2020 Annual Research Report
  • [Book] 痛みのバイオマーカーとしての機能的脳画像診断法2020

    • Author(s)
      小山なつ(分担執筆)
    • Total Pages
      374
    • Publisher
      真興交易
    • ISBN
      9784880039299
    • Related Report
      2020 Annual Research Report

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

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