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Elucidation of voltage-gated calcium channel function in nonexcitatory cells based on clinical genomic studies

Research Project

Project/Area Number 20K09876
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 57010:Oral biological science-related
Research InstitutionTohoku University

Principal Investigator

Wakamori Minoru  東北大学, 歯学研究科, 教授 (50222401)

Co-Investigator(Kenkyū-buntansha) 中村 卓史  東北大学, 歯学研究科, 准教授 (90585324)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords電位依存性 / カルシウム / チャネル / パッチクランプ法 / 電流 / 非興奮性細胞 / 電位依存性チャネル / カルシウムチャネル / パッチクランプ / 静止膜電位 / 電位依存性カルシウムチャネル
Outline of Research at the Start

非興奮性細胞に於いても細胞内カルシウムイオンは重要な働きを担い、細胞外からの流入経路としてはTransient Receptor Potential (TRP)チャネルとStore-Operated Ca2+ (SOC)チャネルが報告されている。電位依存性Ca2+チャネルに注目している研究者は少なく、非興奮性細胞の電位依存性Ca2+チャネルの生理的意義を解明することを目的にしている。硬組織で電位依存性Ca2+チャネルのイオン通過路以外の新規生理機能にも注目し、非興奮性細胞での普遍的機能を見出す。

Outline of Final Research Achievements

The mutation of p.A36V in CACNA1C may be an ultra-rare single-nucleotide variant in Japan individuals. CACNA1C with control or this mutation was transfected into BHK cells that constantly expressed the auxiliary subunits (α2/δ and β2 subunits) of voltage-gated Ca2+ channels. After 3 days, the whole-cell mode of the patch-clamp technique was applied to BHK cells, and the membrane current was recorded under the voltage-clamp condition. This mutation reduced Ca2+-dependent inactivation and resulted in excessive Ca2+ influx via mutation channels. These results suggest that this novel single-nucleotide variant in CACNA1C may contribute to the risk of schizophrenia by affecting Ca2+ homeostasis.

Academic Significance and Societal Importance of the Research Achievements

本研究はヒトの疾患の原因を臨床ゲノム研究から見出し、原因タンパク質を発現していない細胞に遺伝子を導入し、蛋白の機能解析を行った研究である。具体的には電位依存性L型カルシウムチャネルCACNA1CのA36Vが日本人の超まれな変異であり、統合失調症の一塩基変異である可能性が示唆された。BHK細胞にコントロール又は本変異CACNA1Cを遺伝子導入し、パッチクランプ法を用いて電位依存性L型カルシウムチャネルの機能解析を行った。電流のカルシウム依存性不活性化が抑制されカルシウム流入量が増加するgain-of-functionの変異であることが判明した。本成果は病態の解明と治療法の開発にヒントを与える。

Report

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

    (11 results)

All 2022 2021

All Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (6 results) (of which Invited: 1 results)

  • [Journal Article] Identification of ultra-rare disruptive variants in voltage-gated calcium channel-encoding genes in Japanese samples of schizophrenia and autism spectrum disorder2022

    • Author(s)
      Wang C, Horigane SI, Wakamori M, Ueda S, Kawabata T, Fujii H, Kushima I, Kimura H, Ishizuka K, Nakamura Y, Iwayama Y, Ikeda M, Iwata N, Okada T, Aleksic B, Mori D, Yoshida T, Bito H, Yoshikawa T, Takemoto-Kimura S, Ozaki N
    • Journal Title

      Translational Psychiatry

      Volume: 12 Issue: 1 Pages: 84-84

    • DOI

      10.1038/s41398-022-01851-y

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Periodontal ligaments enhance neurite outgrowth in trigeminal ganglion neurons through Wnt5a production induced by mechanical stimulation2022

    • Author(s)
      Takahashi Kaori、Yoshida Takashi、Wakamori Minoru
    • Journal Title

      American Journal of Physiology-Cell Physiology

      Volume: 323 Issue: 6 Pages: C1704-C1719

    • DOI

      10.1152/ajpcell.00302.2022

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A parasympathetic neurotransmitter induces myoepithelial cell differentiation during salivary gland development2022

    • Author(s)
      Shindo Yuki、Nakamura Hannah M.、Nakai Junichi、Wakamori Minoru、Nakamura Takashi
    • Journal Title

      Experimental Cell Research

      Volume: 416 Issue: 1 Pages: 113137-113137

    • DOI

      10.1016/j.yexcr.2022.113137

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Mode-selective inhibitory effects of eugenol on the mouse TRPV1 channel2021

    • Author(s)
      K. Takahashi, T. Yoshida, M. Wakamori
    • Journal Title

      Biochem. Biophys. Res. Commun

      Volume: 556 Pages: 156-162

    • DOI

      10.1016/j.bbrc.2021.03.126

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Capsaicin and Proton Differently Modulate Activation Kinetics of Mouse Transient Receptor Potential Vanilloid-1 Channel Induced by Depolarization2021

    • Author(s)
      Kaori Takahashi, Kentaro Araki, Hideo Miyamoto, Rikimaru Shirakawa, Takashi Yoshida and Minoru Wakamori
    • Journal Title

      Frontier Pharmacology

      Volume: 12 Pages: 672157-672157

    • DOI

      10.3389/fphar.2021.672157

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 副交感神経から分泌されるアセチルコリン(ACh)が唾液腺の発生過程で筋上皮細胞の分化誘導と機能的器官内配置を決定している2022

    • Author(s)
      真藤 裕基, 若森実, 中井淳一, 中村 卓史
    • Organizer
      基礎歯科医学会(徳島)
    • Related Report
      2022 Annual Research Report
  • [Presentation] 機械刺激を受けた歯根膜細胞から産生されるWnt5aによる三叉神経節細胞の分化作用の解明2022

    • Author(s)
      高橋 かおり、吉田 卓史、中村 卓史、若森 実
    • Organizer
      日本薬理学会 第73回北部会(札幌)
    • Related Report
      2022 Annual Research Report
  • [Presentation] Challenge for the Neurotransmitter-Guided Regeneration of Functional Salivary Glands2022

    • Author(s)
      Takashi Nakamura, Minoru Wakamori
    • Organizer
      日本薬理学会 第96回年会(横浜)
    • Related Report
      2022 Annual Research Report
  • [Presentation] Wnt5a, produced by mechanically stimulated periodontal ligament cells, modulates differentiation of trigeminal ganglion cells2022

    • Author(s)
      Kaori Takahashi, Takashi Yoshida, Takashi Nakamura, Minoru Wakamori
    • Organizer
      日本薬理学会 第96回年会(横浜)
    • Related Report
      2022 Annual Research Report
  • [Presentation] Mechanical stimulus to periodontal ligaments regulates neurite outgrowth through Wnt5a production2022

    • Author(s)
      Minoru Wakamori, Kaori Takahashi, Takashi, Yoshida
    • Organizer
      日韓薬理学シンポジウム 日本薬理学会 第96回年会(横浜)
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 抗うつ薬によるCRACチャネル電流の抑制2022

    • Author(s)
      藤村 栞奈、若森 実
    • Organizer
      第95回日本薬理学会年会
    • Related Report
      2021 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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