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The mechanism of cyclic activity of GnRH neurons causing ovulation and follicle maturation.

Research Project

Project/Area Number 20K06924
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 46030:Function of nervous system-related
Research InstitutionHamamatsu University School of Medicine

Principal Investigator

Watanabe Miho  浜松医科大学, 医学部, 助教 (10399321)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordsGABA / GnRHニューロン / CRHニューロン / クロライド / 生殖 / 視床下部 / クロライドホメオスタシス / KCC2 / オシレーション / カルシウムオシレーション
Outline of Research at the Start

GnRHニューロンが排卵や卵胞成熟を引き起こすGnRHの大量分泌やパルス状分泌を起こすメカニズムは明らかにされていない。多数のGnRHニューロン間で周期的に活動が同期することがGnRH分泌様式の基盤となる可能性を考え、Ca2+イメージングによりGnRHニューロンの活動を記録し、活動パターンや同期活動の性成熟や性周期に伴う変化、雌雄差、栄養状態による変化を調べる。また、GABAが興奮性に作用するというGnRHニューロンの性質に着目し、興奮性GABA入力の同期活動への関与を調べる。さらに視床下部のin vivo Ca2+イメージングを行い、GnRH大量分泌やパルス状分泌時の活動パターンを検討する。

Outline of Final Research Achievements

The mechanisms that reduced nutritional status affects the activity of GnRH neurons involved in reproductive regulation and CRH neurons involved in the stress response were investigated. Food restriction to mice disrupted intracellular chloride homeostasis of CRH neurons and weakened inhibitory GABAergic input, which increased the activity of CRH neurons and activated the hypothalamic-pituitary-adrenal axis, thereby affecting the activity of GnRH neurons. I also examined whether synchronization of GnRH neuron activity is a mechanism for the cyclic or pulsatile secretion of GnRH neurons.

Academic Significance and Societal Importance of the Research Achievements

栄養状態の低下による体重の減少などにより、視床下部-下垂体の機能が低下し、無月経や無排卵になる中枢性排卵障害が知られているが、本研究で栄養状態の低下が細胞内クロライドホメオスタシスに影響を及ぼし、GABAによる神経活動制御に変化をもたらすことが、生殖機能低下のメカニズムの一端であることを明らかになり、細胞内ホメオスタシスを維持するトランスポーターやトランスポーターの活動を制御する分子を対象とした新たな治療法の開発につながると考える。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (31 results)

All 2024 2023 2022 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (8 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 7 results,  Open Access: 7 results) Presentation (18 results) (of which Int'l Joint Research: 4 results) Book (1 results) Remarks (3 results)

  • [Int'l Joint Research] Hungarian Academy of Sciences(ハンガリー)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Early establishment of chloride homeostasis in CRH neurons is altered by prenatal stress leading to fetal HPA axis dysregulation2024

    • Author(s)
      Watanabe Miho、Sinha Adya Saran、Shinmyo Yohei、Fukuda Atsuo
    • Journal Title

      Frontiers in Molecular Neuroscience

      Volume: 17 Pages: 1373337-1373337

    • DOI

      10.3389/fnmol.2024.1373337

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Astrocytic NKCC1 inhibits seizures by buffering Cl- and antagonizing neuronal NKCC1 at GABAergic synapses2023

    • Author(s)
      Nguyen Trong Dao、Ishibashi Masaru、Sinha Adya Saran、Watanabe Miho、Kato Daisuke、Horiuchi Hiroshi、Wake Hiroaki、Fukuda Atsuo
    • Journal Title

      Epilepsia

      Volume: 64 Issue: 12 Pages: 3389-3403

    • DOI

      10.1111/epi.17784

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Imbalanced expression of cation-chloride cotransporters as potential therapeutic target in an Angelman syndrome model mouse.2023

    • Author(s)
      Egawa K#, Watanabe M#(#contributed equally to this work), Shiraishi H, Sato D, Takahashi Y, Nishio S , Fukuda A.
    • Journal Title

      Scientific Reports

      Volume: 13: 5685 Issue: 1 Pages: 5685-5685

    • DOI

      10.1038/s41598-023-32376-z

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Taurine depletion during fetal and postnatal development blunts firing responses of neocortical layer II/III pyramidal neurons.2022

    • Author(s)
      Hosoi Y, Akita T, Watanabe M, Ito T, Miyajima H, Fukuda A
    • Journal Title

      Frontiers in Molecular Neuroscience

      Volume: 15: 806798 Pages: 806798-806798

    • DOI

      10.3389/fnmol.2022.806798

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of taurine depletion on body weight and mouse behavior during development.2022

    • Author(s)
      Watanabe M, Ito T, Fukuda A
    • Journal Title

      Metabolites

      Volume: 12(7): 631 Issue: 7 Pages: 631-631

    • DOI

      10.3390/metabo12070631

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] WNK3 kinase maintains neuronal excitability by reducing inwardly rectifying K+ conductance in layer V pyramidal neurons of mouse medial prefrontal cortex.2022

    • Author(s)
      Sinha AS, Wang T, Watanabe M, Hosoi Y, Sohara E, Akita T, Uchida S, Fukuda A
    • Journal Title

      Frontiers in Molecular Neuroscience

      Volume: 15: 856262 Pages: 856262-856262

    • DOI

      10.3389/fnmol.2022.856262

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A subpopulation of AgRP neurons excites CRH axon terminals in median eminence led to HPA axis activation in response to food restriction.2022

    • Author(s)
      Yesmin R, Watanabe M, Sinha AS, Ishibashi M, Wang T, Fukuda A
    • Journal Title

      Frontiers in Molecular Neuroscience

      Volume: 15: 990803 Pages: 1-16

    • DOI

      10.3389/fnmol.2022.990803

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 細胞内タウリンのプロテインキナーゼCによるリン酸化を介したGABAA受容体膜発現制御2020

    • Author(s)
      渡部美穂、細井泰志、秋田天平、伊藤崇志、福田敦夫
    • Journal Title

      タウンリンサーチ

      Volume: 6 Pages: 20-22

    • NAID

      130008090563

    • Related Report
      2020 Research-status Report
  • [Presentation] Regulated KCC2 phosphorylation is critical for dynamic GABA-mediated inhibition.2023

    • Author(s)
      Watanabe M, Kahle KT, Fukuda A, Shinmyo Y.
    • Organizer
      The 20th Kyungpook-Hamamatsu Joint Medical Symposium Hamamatsu Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Astrocytic Na-K-Cl cotransporter type1 attenuates seizures promoted by GABAergic excitation.2023

    • Author(s)
      Nguyen DT, Ishibashi M, Watanabe M, Sinha AS, Yesmin R and Fukuda A.
    • Organizer
      第100回日本生理学会大会
    • Related Report
      2022 Research-status Report
  • [Presentation] Effects of enhanced KCC2 activity induced by dephosphorylation of Thr906 and Thr1007 on neuronal function.2023

    • Author(s)
      Watanabe M, Kahle KT, Fukuda A.
    • Organizer
      第100回日本生理学会大会
    • Related Report
      2022 Research-status Report
  • [Presentation] Taurine depletion during fetal and postnatal development blunts firing responses of neocortical layer II/III pyramidal neurons.2023

    • Author(s)
      Hosoi Y, Akita T, Watanabe M, Ito T, Miyajima H, Fukuda A.
    • Organizer
      第100回日本生理学会大会
    • Related Report
      2022 Research-status Report
  • [Presentation] Astrocytic NKCC1 plays a pivotal role in prevention of seizures promoted by postsynaptic GABAergic excitation in epilepsy models.2022

    • Author(s)
      Nguyen DT, Ishibashi M, Watanabe M, Sinha AS, Yesmin R and Fukuda A.
    • Organizer
      Society for Neuroscience 51st Annual Meeting
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 抑制性神経伝達におけるカリウム-クロライド共輸送体(KCC2)のリン酸化による機能制御の役割2022

    • Author(s)
      渡部美穂、Kahle KT、福田敦夫
    • Organizer
      第49回日本脳科学会
    • Related Report
      2022 Research-status Report
  • [Presentation] Loss of astrocytic Na-K-Cl cotransporter type 1 hastens seizures promoted by GABAergic excitation of neurons.2022

    • Author(s)
      Nguyen DT, Ishibashi M, Watanabe M, Akita T, Sinha AS, Yesmin R and Fukuda A.
    • Organizer
      第49回日本脳科学会
    • Related Report
      2022 Research-status Report
  • [Presentation] Therapeutic effects of bumetanide on neurological dysfunction in a mouse model of Angelman syndrome.2022

    • Author(s)
      Egawa K, Watanabe M, Shiraishi H, Fukuda A.
    • Organizer
      Society for Neuroscience 51st Annual Meeting
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] WNK3 kinase maintains neuronal excitability by regulating trafficking of KCC2 and inward rectifying K+ channels in layer V pyramidal neurons of mouse medial prefrontal cortex.2022

    • Author(s)
      Sinha AS, Wang T, Watanabe M, Sohara E, Akita T, Uchida S, Fukuda A.
    • Organizer
      Society for Neuroscience 51st Annual Meeting
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Loss of astrocytic Na-K-Cl cotransporter type 1 hastens seizures promoted by GABAergic excitation of neurons.2022

    • Author(s)
      Nguyen DT, Ishibashi M, Watanabe M, Sinha AS, Yesmin R, Fukuda A.
    • Organizer
      第69回中部生理学会
    • Related Report
      2022 Research-status Report
  • [Presentation] WNK3 kinase maintains neuronal excitability by regulating trafficking of KCC2 and inward rectifying K+ channels in layer V pyramidal neurons.2022

    • Author(s)
      Sinha AS, Wang T, Watanabe M, Sohara E, Akita T, Uchida S, Fukuda A.
    • Organizer
      第69回中部生理学会
    • Related Report
      2022 Research-status Report
  • [Presentation] Regulated KCC2 phosphorylation is critical for dynamic GABA-mediated inhibition.2022

    • Author(s)
      Watanabe M, Kahle KT, Fukuda A
    • Organizer
      第99回日本生理学会大会
    • Related Report
      2021 Research-status Report
  • [Presentation] タウリンの枯渇がマウス行動および発達期の体重に及ぼす影響2022

    • Author(s)
      渡部美穂、細井泰志、福田敦夫
    • Organizer
      第8回国際タウリン研究会日本部会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] リン酸化によるカリウム-クロライド共輸送体 (KCC2)の機能制御2021

    • Author(s)
      渡部美穂、Kahle KT、福田敦夫
    • Organizer
      第68回中部生理学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 神経細胞内タウリンによるリン酸化を介したGABAA受容体発現制御機構2021

    • Author(s)
      渡部美穂、細井泰志、秋田天平、伊藤崇志、福田敦夫
    • Organizer
      第7回国際タウリン研究会日本部会学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] Developmentally regulated KCC2 phosphorylation is critical for dynamic GABA-mediated inhibition2021

    • Author(s)
      Watanabe M, Kahle KT, Fukuda A
    • Organizer
      第98回日本生理学会大会、第126回日本解剖学会総会・全国学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] カリウム-クロライド共役担体(KCC2)のリン酸化による機能制御2020

    • Author(s)
      渡部美穂、Kahle KT、福田敦夫
    • Organizer
      第67回中部生理学会
    • Related Report
      2020 Research-status Report
  • [Presentation] リン酸化によるカリウム-クロライド共輸送体(KCC2)の機能制御はGABAによる抑制性伝達形成に必須である2020

    • Author(s)
      渡部美穂、Kahle KT、福田敦夫
    • Organizer
      第47回日本脳科学会
    • Related Report
      2020 Research-status Report
  • [Book] Neuronal Chloride Transporters in Health and Disease. Chapter 11. Post-translational modification of neuronal chloride transporters2020

    • Author(s)
      Miho Watanabe, Atsuo Fukuda
    • Total Pages
      13
    • Publisher
      Elsevier
    • ISBN
      9780128153185
    • Related Report
      2020 Research-status Report
  • [Remarks] 浜松医科大学神経生理学講座

    • URL

      https://www.hama-med.ac.jp/education/fac-med/dept/neurophysiology/index.html

    • Related Report
      2023 Annual Research Report 2022 Research-status Report 2021 Research-status Report
  • [Remarks] research map

    • URL

      https://researchmap.jp/mihowatanabe

    • Related Report
      2023 Annual Research Report
  • [Remarks] 日本生理学会ホームページ サイエンストピックス

    • URL

      http://physiology.jp/science-topic/30349/

    • Related Report
      2023 Annual Research Report

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Published: 2020-04-28   Modified: 2025-01-30  

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