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Visual experience-dependent genetic and functional changes in mouse auditory cortex

Research Project

Project/Area Number 19K06947
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 InstitutionSoka University

Principal Investigator

Kawai Hideki  創価大学, 理工学部, 教授 (90546243)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordscrossmodal plasticity / visual loss / cholinergic modulation / auditory processing / クロスモード可塑性 / コリン作動性 / 聴覚皮質 / 視覚喪失 / 遺伝子発現 / 内在的膜特性 / 神経細胞興奮性 / 次世代シークエンサー / 興奮性制御 / シナプス
Outline of Research at the Start

本研究は視覚を失うことで生じる他感覚の鋭敏さが脳のどのような変化によるものなのかを探ることを目的とする。主に聴覚の情報を処理する大脳皮質の神経細胞に焦点をあて、音の周波数などの神経情報伝達を可能にする神経細胞の特性、特に単一細胞で生じる遺伝子発現の変化について網羅的に解析する。また、神経細胞の機能に関わるタンパク質の機能的変化を解析する。本研究により、感覚を失った場合に生じる脳の適応力、もしくは従順さのメカニズムの一端を解明することになる。

Outline of Final Research Achievements

We have examined the effects of visual deprivation on the functional and morphological properties of primary auditory cortex and attempted to exhaustively examine gene expression of individual layer 4 neurons and single gene expression cortical layer-exhaustively. Visual deprivation did not induce clear changes in intrinsic membrane properties and action potential properties in layer 4 pyramidal neurons. However, we found a novel effect of nicotinic regulation in thalamocortical synapses of inhibitory neurons. Also, it became apparent that neuronal morphologies must be considered for nicotinic regulations of excitatory synapses. Meanwhile, our attempt to examine mRNA expression in single neurons faced a roadblock, and technical improvement is required for successful analysis. Meanwhile, we successfully developed a gene expression analysis technique for cells across cortical layers.

Academic Significance and Societal Importance of the Research Achievements

一次聴覚皮質第4層興奮性ニューロンへの興奮性シナプス入力における視覚喪失による影響は先行研究で報告されていた。本研究で、そのニューロンの膜特性自体への影響が観察されなかったことから、主にそれ以外のニューロンでの生物学的変化が示唆された。そのため、今回確立した皮質層網羅的な遺伝子発現解析方法は、クロスモード可塑性の学術分野に貢献するものと考える。また、視床皮質系神経回路における、新たなニコチン性制御機構の解明は、認知機能に重要なコリン作動性制御機構の理解に一石を投じるものである。こうした大脳皮質における可塑的、機能的制御機構の解明は、認知症における新たな治療法の確立に寄与すると考える。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (6 results)

All 2022 2021 2019

All Presentation (6 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Presentation] Nicotinic regulation of sensory filtering in mouse auditory cortex.2022

    • Author(s)
      川井秀樹
    • Organizer
      第99回日本生理学会大会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Nicotinic regulation of sound-evoked responses in mouse auditory cortex: A study using transcranial flavoprotein autofluorescence.2021

    • Author(s)
      中西 誠、川井秀樹
    • Organizer
      The 44th MidWinter Meeting, Association for Research in Otolaryngology
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Nicotinic regulation of spatiotemporal and intensity changes of tone-evoked responses in mouse auditory cortex.2021

    • Author(s)
      中西 誠、川井秀樹
    • Organizer
      The 98nd Annual Meeting of the Physiological Society of Japan
    • Related Report
      2020 Research-status Report
  • [Presentation] The involvement of neuritin 1 in the recovery of middle cerebral artery occulusion by enriched environment in mice.2019

    • Author(s)
      Yumi FUKUZAKI, Kenichi KUNII, and Hideki D. KAWAI
    • Organizer
      The 42nd Annual Meeting of the Japan Neuroscience Society
    • Related Report
      2019 Research-status Report
  • [Presentation] Cell morphology-specific nicotine regulation of excitatory synapse in mouse auditory cortex.2019

    • Author(s)
      Takahiro NAGAYAMA, Raju METHERATE, and Hideki D. KAWAI
    • Organizer
      Neuroscience 2019, The Annual Meeting of the Society for Neuroscience
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Oligodendrocyte progenitor cells during development and upon sensory loss in mouse visual cortex.2019

    • Author(s)
      Hyeryun SHIN and Hideki D. KAWAI
    • Organizer
      Neuroscience 2019, The Annual Meeting of the Society for Neuroscience
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2023-01-30  

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