• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

成体動物を用いた多ニューロン画像法で海馬病態システムに迫る

Research Project

Project/Area Number 10J05408
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Neuroscience in general
Research InstitutionNational Institute for Physiological Sciences (2011-2012)
Saitama University (2010)

Principal Investigator

佐々木 拓哉  生理学研究所, 大脳皮質機能研究系, 特別研究員(PD)

Project Period (FY) 2010 – 2012
Project Status Completed (Fiscal Year 2012)
Budget Amount *help
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2012: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2011: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2010: ¥1,000,000 (Direct Cost: ¥1,000,000)
Keywords神経生理学 / イメージング / 海馬 / ニューロン / 活動電位 / アストロサイト / 軸索 / カルシウム / 自発活動
Research Abstract

蛍光電極を用いた軸索パッチクランプ法を詳細に記述した論文を執筆し、本研究成果はNature Protocols誌およびNeuroscience Research誌に掲載された。ニューロンでは、細胞体で脱分極が起こった際、活動電位の幅が増大するが、この増幅がどのように軸索を伝播していくかを解析した。海馬CA3野の錐体細胞より軸索パッチクランプ記録を行い、軸索の長さと分枝数に依存して、伝播する活動電位の幅が減衰して正常に戻ることを見出した。本研究成果はJournal o fNeuroscience誌およびJournal o fPhysiology誌に掲載された。
また、光感受性チャネルタンパク質を発現する遺伝子改変動物の導入に取り組んだ。本研究では、チャネルロドプシン2をアストロサイトに選択的に発現した遺伝子改変マウスを用いて、これらのアストロサイトを光刺激すると、神経活動が誘発されたことを明らかにした。また、スライス標本を用いた解析から、グリア細胞の光刺激により、グルタミン酸が放出され、小脳プルキンエ細胞のAMPA受容体を活性化させることが明らかになった。また、平行線維-プルキンエ細胞間のシナプスにおいては、グリア細胞の光刺激により、長期的な可塑性が観察された。さらに個体行動の解析から、グリア細胞の光刺激により誘発された神経活動は、小脳依存性の運動学習を制御するのに十分であることが示された。以上の結果から、グリア細胞が神経活動や個体行動を制御し、脳内の情報処理において重要な役割を担っていることが示唆された。
さらに、平成22年度に所属した埼玉大学との共同研究により、高感度の蛍光カルシウムセンサータンパク質の開発に成功し、PLoS ONE誌に2報の論文を掲載した。

Report

(3 results)
  • 2012 Annual Research Report
  • 2011 Annual Research Report
  • 2010 Annual Research Report
  • Research Products

    (31 results)

All 2013 2012 2011 2010 Other

All Journal Article (17 results) (of which Peer Reviewed: 16 results) Presentation (13 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] The axon as a unique computational unit in the cortex2013

    • Author(s)
      T. Sasaki
    • Journal Title

      Neuroscience Research

      Volume: 75 Issue: 2 Pages: 83-88

    • DOI

      10.1016/j.neures.2012.12.004

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Inter-pyramid spike transmission stabilizes the sparseness of recurrent network activity2013

    • Author(s)
      Y.Ikegaya, T.Sasaki, D.Ishikawa, N.Honma, K.Tao, G.Minamisawa, N.Takahashi, S.Ujita, N.Matsuki
    • Journal Title

      Cerebral Cortex

      Volume: (in press) Issue: 2 Pages: 293-304

    • DOI

      10.1093/cercor/bhs006

    • Related Report
      2012 Annual Research Report 2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Targeted axon-attached recording with fluorescent patch-clamp pipettes in brain Slices2012

    • Author(s)
      T. Sasaki. N. Matsuki, Y. Ikegaya
    • Journal Title

      Nature Protocols

      Volume: 7 Issue: 6 Pages: 1228-1234

    • DOI

      10.1038/nprot.2012.061

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Heterogeneity and independency of unitary synaptic outputs from hippocampal CA3 pyramidal cells2012

    • Author(s)
      T. Sasaki. N. Matsuki, Y. Ikegaya
    • Journal Title

      Journal of Physiology

      Volume: 590 Issue: 19 Pages: 4869-4880

    • DOI

      10.1113/jphysiol.2012.237685

    • 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] Effects of axonal topology on the somatic modulation of synaptic outputs2012

    • Author(s)
      T. Sasaki. N. Matsuki, Y. Ikegaya
    • Journal Title

      Journal of Neuro science

      Volume: 32 Issue: 8 Pages: 2868-2876

    • DOI

      10.1523/jneurosci.5365-11.2012

    • Related Report
      2012 Annual Research Report 2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Genetically encoded green fluorescent Ca2+ indicators with improved detectability for neuronal Ca2+ signals2012

    • Author(s)
      M. Ohkura, T. Sasaki. J. Sadakari, K. Gengyo-Ando, Y. Kagawa-Nagamura, C. Kobayashi, Y. Ikegaya, J. Nakai
    • Journal Title

      PLoS ONE

      Volume: 7 Issue: 12 Pages: 1-10

    • DOI

      10.1371/journal.pone.0051286

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] An improved genetically encoded red fluorescent Ca2+ indicator for detecting opticallyevoked action potentials2012

    • Author(s)
      M. Ohkura, T. Sasaki. C. Kobayashi, Y. Ikegaya, J. Nakai
    • Journal Title

      PLoS ONE

      Volume: 7 Issue: 7 Pages: 1-7

    • DOI

      10.1371/journal.pone.0039933

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Preinspiratory calcium rise in putative pre-Botzinger complex astrocytes2012

    • Author(s)
      Y. Okada, T. Sasaki. Y. Oku, N. Takahashi, M. Seki, S. Ujita, K. Tanaka, N. Matsuki, Y. Ikegaya
    • Journal Title

      Journal of Physiology

      Volume: 590 Issue: 19 Pages: 4933-4944

    • DOI

      10.1113/jphysiol.2012.231464

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] GABAA receptors regulate ectopic granule cell migration and development of epilepsy after experimental febrile seizures in the rat2012

    • Author(s)
      R. Koyama, K. Tao, T. Sasaki. J. Ichikawa, D. Miyamoto, R. Muramatsu, N. Matsuki, Y. Ikegaya
    • Journal Title

      Nature Medicine

      Volume: 18 Issue: 8 Pages: 1271-1278

    • DOI

      10.1038/nm.2850

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Expanding the repertoire of optogenetically targeted cells with an enhanced gene expression system2012

    • Author(s)
      K. Tanaka, K. Matsui, T. Sasaki. H. Sano, S. Sugio, K. Fan, K. Ikenaka, R. Hen, J. Nakai, Y. Yanagawa, H. Hasuwa, K. Deisseroth, A. Yamanaka
    • Journal Title

      Cell Reports

      Volume: 2 Issue: 2 Pages: 397-406

    • DOI

      10.1016/j.celrep.2012.06.011

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Action potential modulation during axonal conduction.2011

    • Author(s)
      T.Sasaki, N.Matsuki, Y.Ikegaya
    • Journal Title

      Science

      Volume: 331 Pages: 599-601

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Locally synchronized astrocytes.2011

    • Author(s)
      T.Sasaki, N.Kuga, S.Namiki, N.Matsuki, Y.Ikegaya
    • Journal Title

      Cerebral Cortex

      Volume: in press

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Large-scale calcium waves traveling through astrocytic networks in vivo.2011

    • Author(s)
      N.Kuga, T.Sasaki, Y.Takahara, N.Matsuki, Y.Ikegaya
    • Journal Title

      Journal of Neuroscience

      Volume: 31 Pages: 2607-2614

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fluorescent pipettes for optically targeted patch-clamp recordings.2011

    • Author(s)
      D.Ishikawa, N.Takahashi, T.Sasaki, A.Usami, N.Matsuki, Y.Ikegaya
    • Journal Title

      Neural Networks

      Volume: in press

    • Related Report
      2010 Annual Research Report
  • [Journal Article] Circuit topology for synchronizing neurons in spontaneously active networks.2010

    • Author(s)
      N.Takahashi, T.Sasaki, W.Matsumoto, N.Matsuki, Y.Ikegaya
    • Journal Title

      Proceedings of the National Academy of Sciences of the United States of America

      Volume: 107 Pages: 10244-10249

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Targeted axon-attached recording with fluorescent patch-clamp pipettes in brain slices

    • Author(s)
      T.Sasaki, N.Matsuki, Y.Ikegaya
    • Journal Title

      Nature Protocols

      Volume: (in press)

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Presentation] 光遺伝学的プローブを用いた細胞活動計測および操作2012

    • Author(s)
      佐々木拓哉
    • Organizer
      第4回光操作研究会
    • Place of Presentation
      生理学研究所(愛知県岡崎市)(招待講演)
    • Year and Date
      2012-09-28
    • Related Report
      2012 Annual Research Report
  • [Presentation] Neuron-astrocyte interaction revealed by optogenetics2012

    • Author(s)
      T. Sasaki
    • Organizer
      The 11th Biennial Meeting of the Asian Pacific Society for Neurochemistry
    • Place of Presentation
      Kobe, Hyogo, Japan(招待講演)
    • Year and Date
      2012-09-24
    • Related Report
      2012 Annual Research Report
  • [Presentation] オプトジェネティクスを用いたニューロン-アストロサイト相互作用の解析2012

    • Author(s)
      佐々木拓哉
    • Organizer
      第35回日本神経科学大会
    • Place of Presentation
      国際会議場(愛知県名古屋巾)(招待講演)
    • Year and Date
      2012-09-19
    • Related Report
      2012 Annual Research Report
  • [Presentation] 脳細胞光操作を用いたニューロン-グリア相互作用の解析2012

    • Author(s)
      佐々木拓哉
    • Organizer
      第132回日本薬学会年会
    • Place of Presentation
      北海道大学(札幌市)
    • Year and Date
      2012-03-29
    • Related Report
      2011 Annual Research Report
  • [Presentation] アストロサイトによる軸索を介したシナプス伝達の遠隔調節2011

    • Author(s)
      佐々木拓哉
    • Organizer
      第54回日本神経化学会年会
    • Place of Presentation
      瑠璃光(金沢市)
    • Year and Date
      2011-09-28
    • Related Report
      2011 Annual Research Report
  • [Presentation] 錐体細胞間のスパイク伝達2011

    • Author(s)
      本間尚子、佐々木拓哉、池谷裕二
    • Organizer
      第34回日本神経科学大会
    • Place of Presentation
      パシフィコ横浜(横浜市)
    • Year and Date
      2011-09-15
    • Related Report
      2011 Annual Research Report
  • [Presentation] 軸索の配線トポロジーがシナプス出力を調節する2011

    • Author(s)
      佐々木拓哉、松木則夫、池谷裕二
    • Organizer
      第34回日本神経科学大会
    • Place of Presentation
      パシフィコ横浜(横浜市)
    • Year and Date
      2011-09-15
    • Related Report
      2011 Annual Research Report
  • [Presentation] Nipkow-disk confocal microscopy towards neuronal networks at work.2011

    • Author(s)
      T.Sasaki, N.Matsuki, Y.Ikegaya
    • Organizer
      第84回日本薬理学会年会
    • Place of Presentation
      横浜
    • Year and Date
      2011-03-23
    • Related Report
      2010 Annual Research Report
  • [Presentation] Astrocytes regulate neurotransmission at distant synapses through axonal modulation.2011

    • Author(s)
      T.Sasaki, N.Matsuki, Y.Ikegaya
    • Organizer
      Gordon research conference
    • Place of Presentation
      California
    • Year and Date
      2011-03-07
    • Related Report
      2010 Annual Research Report
  • [Presentation] アストロサイトの時空間活動ダイナミクス2010

    • Author(s)
      佐々木拓哉、松木則夫、池谷裕二
    • Organizer
      第16回グリアクラブ
    • Place of Presentation
      北海道
    • Year and Date
      2010-11-20
    • Related Report
      2010 Annual Research Report
  • [Presentation] Astrocytes regulate neurotransmission at distant synapses through axonal modulation.2010

    • Author(s)
      T.Sasaki, N.Matsuki, Y.Ikegaya
    • Organizer
      Naito conference
    • Place of Presentation
      Syonan, Japan
    • Year and Date
      2010-10-07
    • Related Report
      2010 Annual Research Report
  • [Presentation] 軸索伝導を介したシナプス伝達の遠隔調節2010

    • Author(s)
      佐々木拓哉、松木則夫、池谷裕二
    • Organizer
      第33回日本神経科学大会Neuro2009
    • Place of Presentation
      神戸
    • Year and Date
      2010-09-05
    • Related Report
      2010 Annual Research Report
  • [Presentation] Heterogeneity and independency of unitary synaptic transmission in rat hippocampal slice cultures.2010

    • Author(s)
      T.Sasaki, N.Matsuki, Y.Ikegaya
    • Organizer
      7th Forum of European Neuroscience
    • Place of Presentation
      Amsterdam, Nederland
    • Year and Date
      2010-07-06
    • Related Report
      2010 Annual Research Report
  • [Patent(Industrial Property Rights)] 蛍光マイクロピペット2010

    • Inventor(s)
      池谷裕二、松木則夫、石川大介、佐々木拓哉、高橋直矢、宇佐美篤
    • Industrial Property Rights Holder
      東京大学
    • Filing Date
      2010-02-10
    • Related Report
      2010 Annual Research Report

URL: 

Published: 2010-12-03   Modified: 2024-03-26  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi