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Neural network mechanisms for the induction of sustained activity in the vertical neural integrator

Research Project

Project/Area Number 18K06524
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 InstitutionNara Medical University

Principal Investigator

Saito Yasuhiko  奈良県立医科大学, 医学部, 教授 (70290913)

Co-Investigator(Kenkyū-buntansha) 杉村 岳俊  奈良県立医科大学, 医学部, 助教 (60812526)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords視線制御 / 興奮性神経回路 / NMDA受容体 / シナプス後電流 / 持続的神経活動 / パッチクランプ法 / スライス標本 / カハール間質核 / 舌下神経前位核 / コリン作動性入力 / コバルト取り込み / 神経生理学 / ホールセル記録
Outline of Final Research Achievements

Gaze holding in the horizontal and vertical directions is separately controlled via the prepositus hypoglossi nucleus (PHN) and the interstitial nucleus of Cajal (INC), respectively. In this study, we clarified the mechanisms of excitatory network activation in the PHN and INC using whole-cell recordings in rat brainstem slices. The effect of a Ca2+-permeable AMPA (CP-AMPA) receptor antagonist on the sustained EPSC response was significantly weaker in INC neurons than in PHN neurons. Meanwhile, the effect of an NMDA receptor antagonist on the sustained EPSC response was significantly stronger in INC neurons than in PHN neurons. These results strongly suggest that these excitatory networks are activated via different synaptic mechanisms: a CP-AMPA receptor-dependent mechanism and an NMDA receptor-dependent mechanism in horizontal and vertical integrators, respectively.

Academic Significance and Societal Importance of the Research Achievements

視線保持のためには神経活動を維持する必要があり、本研究によって持続的な神経活動が水平系と垂直系で異なるグルタミン酸受容体の働きによって生じていることが初めて示された。この成果により、視線制御のメカニズムの解明に大きく進展するものと考えられ、さらに、持続的な神経活動は短期記憶や認知など様々な脳機能において重要な役割を担っていることが知られていることから、脳で汎用的に用いられている情報変換機構解明への波及効果も期待される。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (17 results)

All 2020 2019 2018 Other

All Journal Article (10 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 10 results,  Open Access: 6 results) Presentation (5 results) (of which Int'l Joint Research: 3 results) Remarks (2 results)

  • [Journal Article] Distinct proportions of cholinergic neurons in the rat prepositus hypoglossi nucleus according to their cerebellar projection targets2020

    • Author(s)
      Sugimura Taketoshi、Saito Yasuhiko
    • Journal Title

      Journal of Comparative Neurology

      Volume: 529 Issue: 7 Pages: 1541-1552

    • DOI

      10.1002/cne.25035

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Juvenile Social Isolation Enhances the Activity of Inhibitory Neuronal Circuits in the Medial Prefrontal Cortex.2020

    • Author(s)
      Yamamuro K, Yoshino H, Ogawa Y, Okamura K, Nishihata Y, Makinodan M, Saito Y, Kishimoto T
    • Journal Title

      Front Cell Neurosci

      Volume: 14 Pages: 105-105

    • DOI

      10.3389/fncel.2020.00105

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Brainstem organoids from human pluripotent stem cells2020

    • Author(s)
      Nobuyuki Eura, Takeshi K. Matsui, Joachim Luginbuhl, Masaya Matsubayashi, Hitoki Nanaura, Tomo Shiota, Kaoru Kinugawa, Naohiko Iguchi, Takao Kiriyama, Canbin Zheng, Tsukasa Kouno, Yan Jun Lan, Pornparn Kongpracha, Pattama Wiriyasermkul, Yoshihiko M. Sakaguchi, Riko Nagata, Tomoya Komeda, Naritaka Morikawa, et al.
    • Journal Title

      Frontiers in Neuroscience

      Volume: - Pages: 00538-00538

    • DOI

      10.3389/fnins.2020.00538

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Maternal immune activation affects hippocampal excitatory and inhibitory synaptic transmission in offspring from an early developmental period to adulthood.2020

    • Author(s)
      6.Nakagawa K, Yoshino H, Ogawa Y, Yamamuro K, Kimoto S, Noriyama Y, Makinodan M, Yamashita M, Saito Y, Kishimoto T
    • Journal Title

      Font Cell Neurosci

      Volume: 14 Pages: 241-241

    • DOI

      10.3389/fncel.2020.00241

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Ischemic Postconditioning Reduces NMDA Receptor Currents Through the Opening of the Mitochondrial Permeability Transition Pore and KATP Channel in Mouse Neurons2020

    • Author(s)
      Morisaki Yudai、Nakagawa Ichiro、Ogawa Yoichi、Yokoyama Shohei、Furuta Takanori、Saito Yasuhiko、Nakase Hiroyuki
    • Journal Title

      Cellular and Molecular Neurobiology

      Volume: ― Issue: 4 Pages: 1079-1089

    • DOI

      10.1007/s10571-020-00996-y

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Loss of HCN1 subunits causes absence epilepsy in rats2019

    • Author(s)
      Nishitani Ai、Kunisawa Naofumi、Sugimura Taketoshi、Sato Kazuaki、Yoshida Yusaku、Suzuki Toshiro、Sakuma Tetsushi、Yamamoto Takashi、Asano Masahide、Saito Yasuhiko、Ohno Yukihiro、Kuramoto Takashi
    • Journal Title

      Brain Research

      Volume: 1706 Pages: 209-217

    • DOI

      10.1016/j.brainres.2018.11.004

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Ischemic postconditioning prevents surge of presynaptic glutamate release by activating mitochondrial ATP-dependent potassium channels in the mouse hippocampus.2019

    • Author(s)
      Yokoyama S, Nakagawa I, Ogawa Y, Morisaki Y, Motoyama Y, Park YS, Saito Y, Nakase H
    • Journal Title

      PLoS One. 2019 Apr 12;14(4)

      Volume: Apr 12;14(4) Issue: 4 Pages: e0215104-e0215104

    • DOI

      10.1371/journal.pone.0215104

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Different Activation Mechanisms of Excitatory Networks in the Rat Oculomotor Integrators for Vertical and Horizontal Gaze Holding2019

    • Author(s)
      Saito Yasuhiko、Sugimura Taketoshi
    • Journal Title

      eneuro

      Volume: 7 Issue: 1 Pages: 0364-19

    • DOI

      10.1523/eneuro.0364-19.2019

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Firing responses mediated via distinct nicotinic acetylcholine receptor subtypes in rat prepositus hypoglossi nuclei neurons2018

    • Author(s)
      Zhang Yue、Yanagawa Yuchio、Saito Yasuhiko
    • Journal Title

      Journal of Neurophysiology

      Volume: 120 Issue: 4 Pages: 1525-1533

    • DOI

      10.1152/jn.00168.2018

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Purinergic modulation of neuronal activity in the rat prepositus hypoglossi nucleus2018

    • Author(s)
      Sugioka Miho、Saito Yasuhiko
    • Journal Title

      European Journal of Neuroscience

      Volume: 48 Issue: 11 Pages: 3354-3366

    • DOI

      10.1111/ejn.14210

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] Neural connections between oculomotor neural integrators and vestibulo-cerebellum.2019

    • Author(s)
      Sugimura T, Saito Y
    • Organizer
      Neuroscience 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] The neural connections between the oculomotor neural integrators and the vestibulo-cerebellum2019

    • Author(s)
      Sugimura T, Saito Y
    • Organizer
      第42回日本神経科学大会、第62回日本神経化学会大会 合同大会
    • Related Report
      2019 Research-status Report
  • [Presentation] NMDA receptor-mediated activation of excitatory networks in rat interstitial nucleus of Cajal.2019

    • Author(s)
      Saito Y
    • Organizer
      9th FAOPS Congress
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] The neural connections between the oculomotor neural integrators and the vestibulo-cerebellum.2019

    • Author(s)
      Sugimura T、Saito Y
    • Organizer
      9th FAOPS Congress
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] The distribution of the oculomotor neural integrator neurons that project to the vestibulo-cerebellum.2018

    • Author(s)
      Sugimura T、Saito Y
    • Organizer
      第41回日本神経科学大会
    • Related Report
      2018 Research-status Report
  • [Remarks] 生理学第一講座 業績

    • URL

      https://www.naramed-u.ac.jp/~1phy/company.html

    • Related Report
      2020 Annual Research Report
  • [Remarks] 第一生理学講座研究業績

    • URL

      http://www.naramed-u.ac.jp/~1phy/company.html

    • Related Report
      2019 Research-status Report 2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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