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脳内メゾ神経回路の同定に向けた活動神経回路の可視化とその定量的解析基盤の確立

Publicly Offered Research

Project AreaMesoscopic neurocircuitry: towards understanding of the functional and structural basis of brain information processing
Project/Area Number 23115520
Research Category

Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Allocation TypeSingle-year Grants
Review Section Biological Sciences
Research InstitutionNagoya University

Principal Investigator

深澤 有吾  名古屋大学, 医学(系)研究科(研究院), 准教授 (60343745)

Project Period (FY) 2011-04-01 – 2013-03-31
Project Status Completed (Fiscal Year 2012)
Budget Amount *help
¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
Fiscal Year 2012: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2011: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Keywordsシナプス構造 / 神経活動 / 構造―機能相関 / シナプス / 軸索 / 免疫染色 / 電子顕微鏡
Outline of Annual Research Achievements

機能的に重要な役割を担う神経回路の形態学的な特徴を明らかにすることを目的に、脳内で頻繁に活動する神経回路を可視化するための要素技術の確立を目指した。歯状回顆粒細胞―CA3錐体細胞間の回路網とCA3―CA1錐体細胞間の神経連絡に焦点を当て、シナプス結合や分子発現に関する活性化回路の解剖学的特徴を明らかしながら、1)活動の高い細胞群は幾つの回路に分類できるのか?2)活動レベルの高いシナプス後神経細胞には幾つの活動レベルの高いシナプス前細胞が存在するか?等、脳内活動回路に関する基本的な疑問の答えを求め、メゾ回路の実体に迫りたいと解析を進めてきた。
本研究課題は、大別して実験動物作製とメゾ回路の解剖学的解析の2本立ての計画で、平成23年度分の動物作出実験は予想通り進み、回路の解析は遅れた。そこで24年度は神経連絡の解剖学的解析を中心に推進した。しかし、この解析の初期段階で、活動神経回路の全体を明瞭に標識し、活動レベルの高低を電子顕微鏡下で判別できる様にすることが難しいことが判明した。
そこで明瞭に標識された一部分の神経組織のみを解析対象にして、その中に含まれる神経細胞の微細構造を特徴付けし、活動神経回路が持つ機能ドメインの形態的特徴を明らかにすることにした。具体的にはシナプス前後の活動標識の有無によりシナプスを分類し、そのシナプス後肥厚の大きさ(面積)を計測した。この結果、活動マーカーがシナプス前後に陽性のシナプスは、片方が陽性のシナプスに比べて有意に大きいシナプス後肥厚を持ち、前後共に陰性のシナプスは小さいことを示す解析結果を得た。この結果は、高い活動レベルの神経細胞どうしはより機能的に成熟したシナプス構造で結合し、機能的にも強く結びついていることを示唆している。

Research Progress Status

24年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

24年度が最終年度であるため、記入しない。

Report

(2 results)
  • 2012 Annual Research Report
  • 2011 Annual Research Report
  • Research Products

    (18 results)

All 2013 2012 2011

All Journal Article (11 results) (of which Peer Reviewed: 11 results) Presentation (6 results) (of which Invited: 2 results) Book (1 results)

  • [Journal Article] Opto-fMRI analysis for exploring the neuronal connectivity of the hippocampal formation in rats2013

    • Author(s)
      Abe Y Sekino M, Terazono Y, Ohsaki H, Fukazawa Y, Sakai S, Yawo H, Hisatsune T
    • Journal Title

      Neuroscience Research

      Volume: 74 Issue: 3-4 Pages: 248-255

    • DOI

      10.1016/j.neures.2012.08.007

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Evaluation of glutamate concentration transient in the synaptic cleft of the rat calyx of Held2013

    • Author(s)
      Budisantoso T, Harada H, Kamasawa N, Fukazawa Y, Shigemoto R Matsui K
    • Journal Title

      Journal of Physiology

      Volume: 591 Issue: 1 Pages: 219-239

    • DOI

      10.1113/jphysiol.2012.241398

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Neuroligin-1 controls synaptic abundance of NMDA-type glutamate receptors through extracellular coupling2013

    • Author(s)
      Fukazawa Y(他10名)
    • Journal Title

      Proc Natl Acad Sci USA

      Volume: 110 Issue: 2 Pages: 725-730

    • DOI

      10.1073/pnas.1214718110

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Paired stimulation between CA3 and CA1 alters excitability of CA3 in the rat hippocampus.2013

    • Author(s)
      Ohta H, Sakai S, Ito S, Ishizuka T, Fukazawa y Kemuriyama T, Tandai-Hiruma M, Mushiake H, Sato Y, Yawo H, Nishida Y
    • Journal Title

      Neuroscience Letters

      Volume: 534 Pages: 182-187

    • DOI

      10.1016/j.neulet.2012.11.058

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Virus-mediated swapping of zolpidem-insensitive with zolpidem-sensitive GABAA receptors in cortical pyramidal cells2012

    • Author(s)
      Sumegi M, Fukazawa Y, Matsui K, Lorincz A, Eyre MD, Nusser Z, Shigemoto R
    • Journal Title

      J Physiol

      Volume: 590 Issue: 10 Pages: 1517-1534

    • DOI

      10.1113/jphysiol.2012.231100

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Developmental profile of SK2 channel expression and function in CA1 neurons2012

    • Author(s)
      Ballesteros-Merino C
    • Journal Title

      Hippocampus

      Volume: (印刷中) Issue: 6 Pages: 1467-1480

    • DOI

      10.1002/hipo.20986

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Intra-synapse-type and inter-synapse-type relationships between synapticsize and AMPAR expression2012

    • Author(s)
      Fukazawa Y
    • Journal Title

      Current Opinion Neurobiology

      Volume: 22 Issue: 3 Pages: 1-7

    • DOI

      10.1016/j.conb.2012.01.006

    • Related Report
      2012 Annual Research Report 2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Quantitative regional and ultrastructural localization of the Cav2.3 subunit of R-type calcium channels in mouse brain2012

    • Author(s)
      Parajuli L, Nakajima C, Kulik A, Matsui K, Schneider T, Shigemoto R, Fukazawa Y
    • Journal Title

      Journal of Neuroscience

      Volume: 32 Issue: 39 Pages: 13555-13567

    • DOI

      10.1523/jneurosci.1142-12.2012

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Application of an optogenetic byway for perturbing neuronal activity via glialphotostimulation.2012

    • Author(s)
      T. Sasaki. K. Beppu, K. Tanaka, Y. Fukazawa, R. Shigemoto, K. Matsui
    • Journal Title

      Proceedings National Academy of Sciences of the USA

      Volume: 109 Issue: 50 Pages: 20720-20725

    • DOI

      10.1073/pnas.1213458109

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Frequency-dependent entrainment of neocortical slow oscillation to repeated optogenetic stimulation in the anesthetized rat2012

    • Author(s)
      Kuki T, Ohshiro T, Ito S, Ji G, Fukazawa Y, Matsuzaka Y, Yawo H, Mushiake H.
    • Journal Title

      Neurosci Res

      Volume: 75 Issue: 1 Pages: 35-45

    • DOI

      10.1016/j.neures.2012.10.007

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Light-evoked somatosensory perception of transgenic rats which express channelrhodopsin-2 in dorsal root ganglion cells2012

    • Author(s)
      Ji Z-G
    • Journal Title

      PLoS ONE

      Volume: (印刷中)

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Presentation] 急速凍結-凍結割断レプリカ標識法を用いた神経細胞膜上PIP2分布とその活動依存的再編2013

    • Author(s)
      深澤有吾、藤本豊士
    • Organizer
      第118回日本解剖学会全国学術集会
    • Place of Presentation
      高松
    • Year and Date
      2013-03-28
    • Related Report
      2012 Annual Research Report
  • [Presentation] Glutamate Receptor Organization of Central Synapses at The Single Synapse Level and Its Remodeling In Vivo2013

    • Author(s)
      Yugo Fukazawa
    • Organizer
      Global COE 5th International Symposium on Neuro-Tumor Biology and Medicine
    • Place of Presentation
      Ohbu, Japan
    • Year and Date
      2013-02-01
    • Related Report
      2012 Annual Research Report
  • [Presentation] Quantitative analysis of synaptic morphology and molecules, and its functional implications2012

    • Author(s)
      Yugo Fukazawa
    • Organizer
      Symposium on “behavior centered high quality research”
    • Place of Presentation
      Xi'an, CHina
    • Year and Date
      2012-12-04
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] In situ localization of membrane lipids in neuronal plasma membrane2012

    • Author(s)
      Yugo Fukazawa
    • Organizer
      35th Annual Meeting of the Japan Neuroscience Society
    • Place of Presentation
      Nagoya, Japan
    • Year and Date
      2012-09-18
    • Related Report
      2012 Annual Research Report
  • [Presentation] 凍結割断レプリカを用いた分子局在解析の現状と今後の展開:脳内シナプスにおけるAMPA受容体発現の共通性と特異性2012

    • Author(s)
      深澤有吾
    • Organizer
      日本顕微鏡学会 第68回学術講演会
    • Place of Presentation
      つくば
    • Year and Date
      2012-05-15
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] 定量的分子局在解析と計算論的手法によるシナプス構造-機能連関の解析2011

    • Author(s)
      深澤有吾
    • Organizer
      日本顕微鏡学会
    • Place of Presentation
      福岡(招待講演)
    • Year and Date
      2011-05-16
    • Related Report
      2011 Annual Research Report
  • [Book] Electron microscopy of biological membrane. Encyclopedia of Biophysics2013

    • Author(s)
      Fujimoto T, Fukazawa Y
    • Total Pages
      3
    • Publisher
      Academic Press
    • Related Report
      2012 Annual Research Report

URL: 

Published: 2011-04-06   Modified: 2018-03-28  

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