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Exploration of the integrated physiological mechanism of membrane excitability regulation through analyses of disease-causing gene mutations

Research Project

Project/Area Number 17K08534
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field General physiology
Research InstitutionHamamatsu University School of Medicine

Principal Investigator

Akita Tenpei  浜松医科大学, 医学部, 教授 (00522202)

Project Period (FY) 2017-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords発達性てんかん性脳症 / 難治性てんかん / 疾患原因遺伝子変異 / 電位依存性カリウムチャネル / 遺伝子改変マウス / 大脳皮質 / 錐体神経 / 神経発火活動 / KCNB1 / CRISPR-Cas9 / 電位依存性 / カリウムチャネル / 疾患原因遺伝子 / 液胞型プロトンポンプ / シナプス小胞 / 胎生期 / 電位依存性イオンチャネル / タウリン / 細胞膜興奮性 / てんかん / 変異導入マウス / 招待総説 / イオンチャネル病 / 神経前駆細胞 / 脳低形成 / 統合失調症 / 自閉症 / Gad1 / WNK3 / 遺伝子変異 / 神経発達障害 / Canopy3 / CaMKII / Kv4 / シナプス可塑性 / 生理学 / 脳神経疾患 / 神経科学 / 遺伝子
Outline of Final Research Achievements

In this study, we sought to elucidate the pathogenic mechanism of severe and intractable epileptic disorders caused by gene mutations, including developmental and epileptic encephalopathies (DEE), and to search for novel causative mutations. First, we succeeded in generating genetically engineered mice with the same DEE-causing mutation we reported earlier in the gene encoding the voltage-gated potassium channel KCNB1 (Kv2.1), and found that pyramidal neurons in the cerebral cortex of these mice indeed exhibited a repetitive firing pattern different from normal. Furthermore, through genetic analyses of the patients and functional analyses of the mutations, we identified and reported four novel causative gene mutations.

Academic Significance and Societal Importance of the Research Achievements

かつて原因不明とされていた、乳幼児・小児期発症の治療抵抗性てんかんを伴う重度の神経発達障害は、その多くが遺伝子変異によると考えられ、近年の次世代シークエンサーの普及を通じて挙がった候補に対して機能解析を集中的に行うことにより、実際に数多くの原因遺伝子変異が同定されるに至り、本研究もその一端に貢献した。一方、それらに対する的確な治療法の開発には未だ隔たりがあり、変異によるてんかん発症機序の詳細を解明する必要がある。本研究では患者と同じ変異を導入した遺伝子改変マウスを作成し、そのマウスの神経活動を調べることにより発症機序を解明しつつあり、今後の治療への応用が期待される。

Report

(6 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (37 results)

All 2021 2020 2019 2018 2017 Other

All Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 7 results,  Open Access: 4 results) Presentation (24 results) (of which Int'l Joint Research: 5 results) Book (1 results) Remarks (5 results)

  • [Journal Article] ATP6V0A1 encoding the a1-subunit of the V0 domain of vacuolar H(+)-ATPases is essential for brain development in humans and mice2021

    • Author(s)
      Aoto K, Kato M, Akita T, Nakashima M, Mutoh H, Akasaka N, Tohyama J, Nomura Y, Hoshino K, Ago Y, Tanaka R, Epstein O, Ben-Haim R, Heyman E, Miyazaki T, Belal H, Takabayashi S, Ohba C, Takata A, Mizuguchi T, Miyatake S, Miyake N, Fukuda A, Matsumoto N and Saitsu H
    • Journal Title

      Nat Commun

      Volume: 12 Issue: 1 Pages: 2107-2107

    • DOI

      10.1038/s41467-021-22389-5

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] タウリントランスポーター(TauT)欠損の大脳皮質Ⅱ/Ⅲ層錐体神経発火活動への影響について2020

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

      タウリンリサーチ

      Volume: 6(1) Pages: 18-19

    • NAID

      130008090565

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [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

      タウリンリサーチ

      Volume: 6(1) Pages: 20-22

    • NAID

      130008090563

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Intracellular Cl- dysregulation causing and caused by pathogenic neuronal activity.2020

    • Author(s)
      Akita T, Fukuda A
    • Journal Title

      Pflugers Archiv - European Journal of Physiology

      Volume: - Issue: 7 Pages: 977-987

    • DOI

      10.1007/s00424-020-02375-4

    • NAID

      120007026259

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Alterations of GABAergic Neuron-Associated Extracellular Matrix and Synaptic Responses in Gad1-Heterozygous Mice Subjected to Prenatal Stress2018

    • Author(s)
      Wang T, Sinha AS, Akita T, Yanagawa Y, Fukuda A
    • Journal Title

      Frontiers in Cellular Neuroscience

      Volume: 12 Pages: 284-284

    • DOI

      10.3389/fncel.2018.00284

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Biallelic Variants in CNPY3 , Encoding an Endoplasmic Reticulum Chaperone, Cause Early-Onset Epileptic Encephalopathy2018

    • Author(s)
      Mutoh Hiroki、Kato Mitsuhiro、Akita Tenpei、Shibata Takuma、Wakamoto Hiroyuki、Ikeda Hiroko、Kitaura Hiroki、Aoto Kazushi、Nakashima Mitsuko、Wang Tianying、Ohba Chihiro、Miyatake Satoko、Miyake Noriko、Kakita Akiyoshi、Miyake Kensuke、Fukuda Atsuo、Matsumoto Naomichi、Saitsu Hirotomo
    • Journal Title

      The American Journal of Human Genetics

      Volume: 102 Issue: 2 Pages: 321-329

    • DOI

      10.1016/j.ajhg.2018.01.004

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] De novo variants in CAMK2A and CAMK2B cause neurodevelopmental disorders2018

    • Author(s)
      Akita Tenpei、Aoto Kazushi、Kato Mitsuhiro、Shiina Masaaki、Mutoh Hiroki、Nakashima Mitsuko、Kuki Ichiro、Okazaki Shin、Magara Shinichi、Shiihara Takashi、Yokochi Kenji、Aiba Kaori、Tohyama Jun、Ohba Chihiro、Miyatake Satoko、Miyake Noriko、Ogata Kazuhiro、Fukuda Atsuo、Matsumoto Naomichi、Saitsu Hirotomo
    • Journal Title

      Annals of Clinical and Translational Neurology

      Volume: 5 Issue: 3 Pages: 280-296

    • DOI

      10.1002/acn3.528

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 発達性てんかん性脳症を引き起こすKv2.1 R306C 変異の大脳皮質錐体神経発火活動への影響について2021

    • Author(s)
      秋田天平、青戸一司、才津浩智、福田敦夫
    • Organizer
      第68回中部日本生理学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Voltage-sensitive Na+ and K+ current components in interneuron precursors in the medial ganglionic eminence of the embryonic cerebrum.2021

    • Author(s)
      Akita T, Fukuda A
    • Organizer
      第98回日本生理学会大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 胎児期・生後発達期のタウリン枯渇は大脳皮質錐体神経の発火応答を鈍麻させる2021

    • Author(s)
      秋田天平、細井泰志、渡部美穂、伊藤崇志、宮嶋裕明、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] 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] 神経連続発火活動低下を伴うてんかん性脳症発症機序の解明を目指して2020

    • Author(s)
      秋田天平、青戸一司、才津浩智、北野勝則、福田敦夫
    • Organizer
      第47回日本脳科学会
    • Related Report
      2020 Research-status Report
  • [Presentation] 胎生脳内側基底核原基の神経前駆細胞における2種類の電位依存性陽イオン電流の発見2020

    • Author(s)
      秋田天平、福田敦夫
    • Organizer
      第67回中部日本生理学会
    • Related Report
      2020 Research-status Report
  • [Presentation] WNK3 kinase maintains basal excitability by regulating inward rectification and intracellular chloride in layer V pyramidal neurons of mouse medial prefrontal cortex.2020

    • Author(s)
      Sinha AS, Wang T, Hosoi Y, Sohara E, Akita T, Uchida S, Fukuda A
    • Organizer
      第97回日本生理学会大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Two cation current components in GABAergic interneuron precursors in the medial ganglionic eminence of the embryonic brain.2020

    • Author(s)
      Akita T, Fukuda A
    • Organizer
      第97回日本生理学会大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Static magnetic fields reduce excitability of pyramidal neurons by enhancing membrane Cl- conductance in the mouse motor cortex.2019

    • Author(s)
      Sinha AS, Takamatsu Y, Akita T, Mima T, Fukuda A
    • Organizer
      第42回日本神経科学大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Prenatal stress to the Gad1 heterozygotes causes epigenetic changes in neurodevelopment and behavior relating genes and affects their phenotypes.2019

    • Author(s)
      Wang T, Sinha AS, Mutoh H, Akita T, Yanagawa Y, Kawai T, Hata K, Fukuda A
    • Organizer
      第42回日本神経科学大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 胎生期大脳基底核原基の神経前駆細胞に生じる膜電流成分について2019

    • Author(s)
      秋田天平、福田敦夫
    • Organizer
      第66回中部日本生理学会
    • Related Report
      2019 Research-status Report
  • [Presentation] Ca2+ signaling and ion channel activation in embryonic neurons in the medial ganglionic eminence.2019

    • Author(s)
      Akita T, Fukuda A
    • Organizer
      The 9th Congress of the Federation of Asian and Oceanian Physiological Societies (FAOPS)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Mechanisms underlying WNK3 kinase mediated regulation of neuronal excitability in prefrontal cortex.2019

    • Author(s)
      Sinha AS, Wang T, Hosoi Y, Sohara E, Akita T, Uchida S, Fukuda A
    • Organizer
      The 9th Congress of the Federation of Asian and Oceanian Physiological Societies (FAOPS)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Prenatal stress on Gad1-heterozygotes perturbs development of GABAergic networks affecting behavior.2019

    • Author(s)
      Wang T, Sinha AS, Mutoh H, Akita T, Yanagawa Y, Kawai T, Hata K, Fukuda A
    • Organizer
      The 9th Congress of the Federation of Asian and Oceanian Physiological Societies (FAOPS)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] De novo mutants of CaMKIIα/β responsible for neurodevelopmental disorders upregulate A-type voltage-dependent K+ currents in hippocampal neurons.2018

    • Author(s)
      Akita T, Aoto K, Kato M, Shiina M, Mutoh H, Nakashima M, Kuki I, Okazaki S, Magara S, Shiihara T, Yokochi K, Aiba K, Tohyama J, Ohba C, Miyatake S, Miyake N, Ogata K, Fukuda A, Matsumoto N, Saitsu H
    • Organizer
      第41回日本神経科学大会
    • Related Report
      2018 Research-status Report
  • [Presentation] WNK3 Kinase regulates inwardly rectifying potassium channels in layer V pyramidal neurons of the mouse prefrontal cortex.2018

    • Author(s)
      Sinha AS, Hosoi Y, Sohara E, Mutoh H, Akita T, Uchida S, Fukuda A
    • Organizer
      第41回日本神経科学大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Prenatal stress on Gad1-heterozygotes selectively perturbs GABAergic neurogenesis, GABAergic synapse function and behavioral phenotypes.2018

    • Author(s)
      Wang T, Sinha AS, Mutoh H, Akita T, Yanagawa Y, Kawai T, Hata K, Fukuda A
    • Organizer
      第41回日本神経科学大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Biallelic variants in CNPY3, encoding an endoplasmic reticulum chaperone, cause early-onset epileptic encephalopathy.2018

    • Author(s)
      Mutoh H, Kato M, Akita T, Shibata T, Wakamoto H, Ikeda H, Kitaura H, Aoto K, Nakashima M, Wang T, Ohba C, Miyatake S, Miyake N, Kakita A Miyake K, Fukuda A, Matsumoto N, Saitsu H
    • Organizer
      第41回日本神経科学大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 胎生期大脳基底核原基の神経前駆細胞内Ca2+シグナリングについて2018

    • Author(s)
      秋田天平、福田敦夫
    • Organizer
      第65回中部日本生理学会
    • Related Report
      2018 Research-status Report
  • [Presentation] Alterations of GABAergic neuron-associated extracellular matrix and synaptic responses in Gad1-heterozygous mice subjected to prenatal stress.2018

    • Author(s)
      Sinha AS, Wang T, Mutoh H, Akita T, Yanagawa Y, Fukuda A
    • Organizer
      第65回中部日本生理学会
    • Related Report
      2018 Research-status Report
  • [Presentation] 胎生期大脳基底核原基の神経前駆細胞内Ca2+オシレーションについて2018

    • Author(s)
      秋田天平、福田敦夫
    • Organizer
      新学術領域研究「オシロロジー」第2回領域会議
    • Related Report
      2018 Research-status Report
  • [Presentation] De novo CaMKIIalpha/beta mutants causing neurodevelopmental disorders upregulate A-type voltage-dependent K+ currents in hippocampal neurons.2018

    • Author(s)
      Akita T, Aoto K, Fukuda A, Matsumoto N, Saitsu H
    • Organizer
      The 95th Annual Meeting of The Physiological Society of Japan
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Exploring integrated regulation of membrane excitability through analyses of epilepsy-associated gene mutations.2017

    • Author(s)
      Akita T, Saitsu H, Matsumoto N, Fukuda A
    • Organizer
      International Symposium Neural Oscillation Conference 2017: Problems of consciousness and neuropsychiatric disorders as network diseases
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] てんかん及び神経発達障害をもたらすCaMKII新生突然変異体の発見2017

    • Author(s)
      秋田天平、青戸一司、加藤光広、椎名政昭、武藤弘樹、中島光子、九鬼一郎、岡崎伸、眞柄慎一、椎原隆、横地健治、相場佳織、遠山潤、大場ちひろ、宮武聡子、三宅紀子、緒方一博、福田敦夫、松本直通、才津浩智
    • Organizer
      新学術領域研究「オシロロジー」第2回領域会議
    • Related Report
      2017 Research-status Report
  • [Book] "Regulation of neuronal cell migration and cortical development by chloride transporter activities." In Neuronal Chloride Transporters in Health and Disease2020

    • Author(s)
      Akita T, Fukuda A
    • Total Pages
      650
    • Publisher
      Academic Press, Elsevier
    • ISBN
      9780128153185
    • Related Report
      2019 Research-status Report
  • [Remarks] リソソームの膜タンパク質ATP6V0A1の異常が発達性およびてんかん性脳症の原因となることを発見

    • URL

      https://www.amed.go.jp/news/release_20210409-02.html

    • Related Report
      2021 Annual Research Report
  • [Remarks] リソソームの膜タンパク質ATP6V0A1の異常が発達性およびてんかん性脳症の原因であることを発見

    • URL

      https://www.yokohama-cu.ac.jp/amedrc/news/20210405matsumoto_NC_.html

    • Related Report
      2021 Annual Research Report
  • [Remarks] リソソームの膜タンパク質ATP6V0A1の異常が発達性およびてんかん性脳症の原因となることを発見

    • URL

      https://www.hama-med.ac.jp/public-relations/press/index.html

    • Related Report
      2020 Research-status Report
  • [Remarks] 小児期の難治性てんかん(ウエスト症候群)の責任遺伝子の同定

    • URL

      https://www.hama-med.ac.jp/dcdb9c577eca6cb36b0722342dc26961.pdf

    • Related Report
      2017 Research-status Report
  • [Remarks] 酵素タンパク質CaMKIIの神経発達障害を起こす突然変異体を発見

    • URL

      http://physiology.jp/science-topic/20773/

    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2023-01-30  

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