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Elucidation of the molecular pathogenetic mechanism of West syndrome in the context of Phactr1 gene abnormalities

Research Project

Project/Area Number 20K08200
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52050:Embryonic medicine and pediatrics-related
Research InstitutionInstitute for Developmental Research Aichi Developmental Disability Center

Principal Investigator

Hamada Nanako  愛知県医療療育総合センター発達障害研究所, 分子病態研究部, 主任研究員 (70721835)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordsウエスト症候群 / Phactr1 / PHACTR1 / phactr1 / てんかん
Outline of Research at the Start

これまでに我々はウエスト症候群(乳児期に発症する難治性てんかん)患者から新規の原因遺伝子としてPHACTR1を同定し、その異常が大脳皮質構築の障害を引き起こすことを見出した。それを踏まえ本研究では、PHACTR1変異の臨床的意義に焦点を絞り、患者由来リンパ芽球の樹立と生化学・細胞生物学的解析、疾患iPS細胞から誘導したニューロンのin vitro解析、カリウムチャネルKCNT1(小児てんかん性脳症の原因遺伝子)との相互作用の解析、患者の変異を導入したノックイン(KI)マウスの作成とそれを用いた病態解析を行う。

Outline of Final Research Achievements

PHACTR1 is a gene whose mutation was identified in a patient with West syndrome, and its effects on neuronal migration and dendrite formation have been analyzed. In this study, we focused on the clinical significance of PHACTR1 mutations and established patient-derived lymphoblasts for characterization. The results showed no difference in PHACTR1 expression or subcellular localization between normal and patient-derived lymphoblasts, suggesting that differences in binding to actin and protein phosphatase may be the cause of the disease. KCNT1, which binds to PHACTR1, was also suggested to be involved in neuronal migration.

Academic Significance and Societal Importance of the Research Achievements

PHACTR1は日本人ウエスト症候群患者からバリアントが同定された遺伝子である。PHACTR1はシナプス関連分子など主要なてんかん原因分子とは異なり、細胞骨格を構成する分子と相互作用するが、生理作用等は全く不明である。本研究で患者の細胞を用いて得られた結果は、Phactr1の細胞生物学的性状やてんかんの発症機序を理解する一助となり、新規治療法の開発につながる可能性がある。

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

    (33 results)

All 2024 2023 2022 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (12 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 12 results,  Open Access: 6 results) Presentation (18 results) (of which Int'l Joint Research: 1 results,  Invited: 2 results) Remarks (2 results)

  • [Int'l Joint Research] The Hebrew University(イスラエル)

    • Related Report
      2022 Research-status Report
  • [Journal Article] Expression analysis of type I ARF small GTPases ARF1-3 during mouse brain development2024

    • Author(s)
      Matsuki Tohru、Hamada Nanako、Ito Hidenori、Sugawara Ryota、Iwamoto Ikuko、Nakayama Atsuo、Nagata Koh-ichi
    • Journal Title

      Molecular Biology Reports

      Volume: 51 Issue: 1 Pages: 106-106

    • DOI

      10.1007/s11033-023-09142-5

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Analyses of Conditional Knockout Mice for Pogz, a Gene Responsible for Neurodevelopmental Disorders in Excitatory and Inhibitory Neurons in the Brain2024

    • Author(s)
      Hamada Nanako、Nishijo Takuma、Iwamoto Ikuko、Shifman Sagiv、Nagata Koh-ichi
    • Journal Title

      Cells

      Volume: 13 Issue: 6 Pages: 540-540

    • DOI

      10.3390/cells13060540

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] <scp>MED13L</scp> and its disease‐associated variants influence the dendritic development of cerebral cortical neurons in the mammalian brain2023

    • Author(s)
      Hamada Nanako、Iwamoto Ikuko、Nagata Koh‐ichi
    • Journal Title

      Journal of Neurochemistry

      Volume: 165 Issue: 3 Pages: 334-347

    • DOI

      10.1111/jnc.15783

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Expression Analyses of Rich2/Arhgap44, a Rho Family GTPase-Activating Protein, during Mouse Brain Development.2023

    • Author(s)
      Goto N, Nishikawa M, Ito H, Noda M, Hamada N, Tabata H, Kinoshita M, Nagata K-I
    • Journal Title

      Dev. Neurosci.

      Volume: 45 Issue: 1 Pages: 19-26

    • DOI

      10.1159/000529051

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Expression analyses of WAC, a responsible gene for neurodevelopmental disorders, during mouse brain development2023

    • Author(s)
      Nishikawa Masashi、Matsuki Tohru、Hamada Nanako、Nakayama Atsuo、Ito Hidenori、Nagata Koh-ichi
    • Journal Title

      Medical Molecular Morphology

      Volume: 56 Issue: 4 Pages: 266-273

    • DOI

      10.1007/s00795-023-00364-x

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Expression Analyses of Cep152, a Responsible Gene Product for Autosomal Recessive Primary Microcephaly, during Mouse Brain Development2022

    • Author(s)
      Hamada Nanako、Noda Mariko、Ito Hidenori、Iwamoto Ikuko、Nagata Koh-ichi
    • Journal Title

      Developmental Neuroscience

      Volume: 44 Issue: 3 Pages: 162-170

    • DOI

      10.1159/000523922

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Expression Analyses of Polo-Like Kinase 4, a Gene Product Responsible for Autosomal Recessive Microcephaly and Seckel Syndrome, during Mouse Brain Development2022

    • Author(s)
      Hamada Nanako、Iwamoto Ikuko、Noda Mariko、Nishikawa Masashi、Nagata Koh-ichi
    • Journal Title

      Developmental Neuroscience

      Volume: 44 Issue: 6 Pages: 643-650

    • DOI

      10.1159/000526914

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Expression Analyses of Mediator Complex Subunit 13-Like: A Responsible Gene for Neurodevelopmental Disorders during Mouse Brain Development2021

    • Author(s)
      Hamada Nanako、Iwamoto Ikuko、Nishikawa Masashi、Nagata Koh-ichi
    • Journal Title

      Developmental Neuroscience

      Volume: - Issue: 1 Pages: 1-10

    • DOI

      10.1159/000515188

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Expression analyses of PLEKHG2, a Rho family-specific guanine nucleotide exchange factor, during mouse brain development2021

    • Author(s)
      Nishikawa Masashi、Ito Hidenori、Noda Mariko、Hamada Nanako、Tabata Hidenori、Nagata Koh-ichi
    • Journal Title

      Medical Molecular Morphology

      Volume: - Issue: 2 Pages: 146-155

    • DOI

      10.1007/s00795-020-00275-1

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Heterotrimeric G-protein, Gi1, is involved in the regulation of proliferation, neuronal migration and dendrite morphology during cortical development in vivo.2021

    • Author(s)
      Hamada N, Iwamoto I, Kawamura N, Nagata K.
    • Journal Title

      J. Neurochem.

      Volume: 1 Issue: 4 Pages: 1-1

    • DOI

      10.1111/jnc.15205

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Pogz deficiency leads to transcription dysregulation and impaired cerebellar activity underlying autism-like behavior in mice.2020

    • Author(s)
      Reut Suliman-Lavie, Ben Title, Yahel Cohen, Hamada N, Maayan Tal, Nitzan Tal, Galya Monderer- Rothkoff, Bjorg Gudmundsdottir, Kristbjorn O Gudmundsson, Jonathan R Keller, Guo-Jen Huang, Nagata K, Yosef Yarom, Sagiv Shifman.
    • Journal Title

      Nat. Commun.

      Volume: 11 Issue: 1 Pages: 5836-5836

    • DOI

      10.1038/s41467-020-19577-0

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Neuropathophysiological significance of the c.1449T>C/p.(Tyr64Cys) mutation in the CDC42 gene responsible for Takenouchi-Kosaki syndrome2020

    • Author(s)
      Hamada Nanako、Ito Hidenori、Shibukawa Yukinao、Morishita Rika、Iwamoto Ikuko、Okamoto Nobuhiko、Nagata Koh-ichi
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 529 Issue: 4 Pages: 1033-1037

    • DOI

      10.1016/j.bbrc.2020.06.104

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] 小頭症/セッケル症候群の原因遺伝子CEP152の新規遺伝子変異同定と病態形成機構の解明2023

    • Author(s)
      浜田奈々子, 西條琢真, 上原朋子, 武内俊樹, 小崎健次郎, 水野誠司, 永田浩一
    • Organizer
      日本小児科学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Expression analyses of Cep152 and Plk4, a responsible gene product for autosomal recessive primary microcephaly, during mouse brain development2023

    • Author(s)
      浜田奈々子, 永田浩一
    • Organizer
      日本神経科学会大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 小頭症・セッケル症候群の原因遺伝子 Polo-like kinase 4 (Plk4)のマウス発達脳における発現解析2023

    • Author(s)
      浜田奈々子, 永田浩一
    • Organizer
      日本神経化学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] CEP152変異マウスを用いた小頭症/Seckel症候群の病態形成機構の解明2023

    • Author(s)
      浜田奈々子, 西條琢真, 永田浩一
    • Organizer
      日本臨床分子形態学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 中心体タンパク質CEP152とPLK4の相互作用と機能破綻が引き起こす小頭症/Seckel症候群の病態形成機構の解明2023

    • Author(s)
      浜田奈々子、岩本郁子、永田浩一
    • Organizer
      日本小児遺伝学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 発達障害原因遺伝子MED13Lの神経発達における役割と遺伝子変異がもたらす病態形成機構の解明2023

    • Author(s)
      浜田奈々子, 永田浩一
    • Organizer
      日本小児遺伝学会
    • Related Report
      2022 Research-status Report
  • [Presentation] 電気穿孔法を用いた神経発達障害の病態解析2022

    • Author(s)
      浜田奈々子、伊東秀記、永田浩一
    • Organizer
      日本臨床分子形態学会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 小頭症/セッケル症候群の原因遺伝子CEP152の新規遺伝子変異同定と病態形成機構の解明2022

    • Author(s)
      浜田奈々子、水野誠司、永田浩一
    • Organizer
      日本臨床分子形態学会
    • Related Report
      2022 Research-status Report
  • [Presentation] CEP152遺伝子変異を有する小頭症/セッケル症候群の病態形成機構の解明2022

    • Author(s)
      浜田奈々子, 西條琢真, 西川将司, 水野誠司, 永田浩一
    • Organizer
      神経組織培養研究会
    • Related Report
      2022 Research-status Report
  • [Presentation] CEP152-deficiency promotes impaired centrosome duplication- and cell death-dependent dwarfism in mice2022

    • Author(s)
      浜田奈々子, 西條琢磨, 西川将司, 上原朋子, 武内俊樹, 小崎健次郎, 水野誠司,永田浩一
    • Organizer
      日本神経化学会
    • Related Report
      2022 Research-status Report
  • [Presentation] Expression and functional analyses of MED13L during mouse brain development.2021

    • Author(s)
      Nanako Hamada, Koh-ichi Nagata
    • Organizer
      SIMONS FOUNDATION MED13L Scientific Meeting
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Essential role of MED13L, a responsible gene for autism spectrum disorders, in brain development.2021

    • Author(s)
      浜田奈々子、永田浩一
    • Organizer
      日本神経化学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 達障害責任遺伝子MED13Lの神経発達における役割と遺伝子変異がもたらす病態機能解析2021

    • Author(s)
      浜田奈々子、永田浩一
    • Organizer
      本臨床分子形態学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 小頭症/Seckel症候群の原因遺伝子CEP152の新規遺伝子変異同定と病態形成メカニズムの解明2021

    • Author(s)
      浜田奈々子、西條琢磨、西川将司、上原朋子、武内俊樹、小崎健次郎、水野誠司、永田浩一
    • Organizer
      日本小児遺伝学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 発達障害関連遺伝子GNAI1の神経発達における機能解明2021

    • Author(s)
      浜田奈々子、永田浩一
    • Organizer
      日本小児遺伝学会
    • Related Report
      2020 Research-status Report
  • [Presentation] 三量体Gタンパク質Gi1の神経発達における形態学的機能解析2020

    • Author(s)
      浜田奈々子、永田浩一
    • Organizer
      日本臨床分子形態学会
    • Related Report
      2020 Research-status Report
  • [Presentation] Role of a heterotrimeric G-protein, Gi1, in the corticogenesis.2020

    • Author(s)
      浜田奈々子、永田浩一
    • Organizer
      日本神経化学会
    • Related Report
      2020 Research-status Report
  • [Presentation] Role of a heterotrimeric G-protein, Gαi1, regulates neurogenesis, migration and development in cortical excitatory neurons.2020

    • Author(s)
      浜田奈々子、永田浩一
    • Organizer
      日本神経科学大会
    • Related Report
      2020 Research-status Report
  • [Remarks] 愛知県医療療育総合センター発達障害研究所

    • URL

      https://www.pref.aichi.jp/addc/eachfacility/hattatsu/index.html

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
  • [Remarks] 発達障害研究所分子病態研究部

    • URL

      https://www.pref.aichi.jp/addc/eachfacility/hattatsu/department/index4.html

    • Related Report
      2020 Research-status Report

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

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