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

Regulation of channel activity of AMPA receptors by membrane microdomains as revealed by high-resolution single-molecule imaging

Research Project

Project/Area Number 17K19521
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Research Field Biomedical structure and function and related fields
Research InstitutionGifu University

Principal Investigator

Suzuki Kenichi  岐阜大学, 研究推進・社会連携機構, 教授 (50423059)

Project Period (FY) 2017-06-30 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2017: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
KeywordsAMPA受容体 / 1分子蛍光観察 / 超解像蛍光観察 / チャネル活性 / 超解像イメージング / 1分子イメージング / シナプス
Outline of Final Research Achievements

The purpose of this study is to unravel the distribution of AMPA receptors (AMPARs) and the mechanisms of synapse plasticity. Single-molecule observation in HEK203 cell plasma membranes revealed that AMPARs did not form stable tetramers, and even monomers existed. Furthermore, we found that AMPARs formed transient homodimers with a lifetime of about 100 ms in mouse neuronal membranes. The mobility of AMPARs was very slow in Homer 1b domain of synapse region, meanwhile some of AMPARs diffused rapidly outside of Homer 1b domains Based on these results, we propose a model that AMPARs alter the density in and out of the post-synapse upon stimulation and generate synapse plasticity, which is caused by the rapid mobility of AMPAR monomers.

Academic Significance and Societal Importance of the Research Achievements

本研究では、神経細胞間での情報伝達が起きているシナプスと言われる領域で、情報伝達の担い手である受容体が、刺激に応じて増減する機構を解明しようと試みた。神経細胞上で受容体の1分子ずつを観察した結果、受容体は今まで考えられてきたような安定な4量体ばかりではなく、短い寿命の2量体や単量体も多くみられた。シナプス領域中のHomer1bというタンパク質でできた膜領域では、受容体の運動は非常に遅かったが、その外では速い成分も存在していた。これらの結果から、刺激に応じて神経細胞がシナプス領域内外の受容体密度を迅速に変えることができるのは、受容体の単量体の速い動きが原因だというモデルを提案した。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (21 results)

All 2019 2018 2017

All Journal Article (9 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 9 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (12 results) (of which Int'l Joint Research: 2 results,  Invited: 12 results)

  • [Journal Article] Dual-FRET imaging of IP3 and Ca2+ revealed Ca2+-induced IP3 production maintains long lasting Ca2+ oscillations in fertilized mouse eggs.2019

    • Author(s)
      Toru Mitsu-Ura, Hideki Shirakawa, Kenichi G. N. Suzuki, Akitoshi Miyamoto, Kotomi Sugiura, Takayuki Michikawa, Akihiro Kusumi, Katsuhiko Mikoshiba.
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1 Pages: 4829-4829

    • DOI

      10.1038/s41598-019-40931-w

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Unraveling of lipid raft organization in cell plasma membranes by single-molecule imaging of ganglioside probes.2018

    • Author(s)
      Kenichi G. N. Suzuki, Hiromune Ando, Naoko Komura, Takahiro Fujiwara, Makoto Kiso, Akihiro Kusumi.
    • Journal Title

      Advances in Experimental Medicine and Biology

      Volume: 1104 Pages: 41-58

    • DOI

      10.1007/978-981-13-2158-0_3

    • ISBN
      9789811321573, 9789811321580
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Evidence of lipid rafts based on the partition and dynamic behavior of sphingomyelins2018

    • Author(s)
      Kinoshita Masanao、Suzuki Kenichi G.N.、Murata Michio、Matsumori Nobuaki
    • Journal Title

      Chemistry and Physics of Lipids

      Volume: 215 Pages: 84-95

    • DOI

      10.1016/j.chemphyslip.2018.07.002

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Super-long single-molecule tracking reveals dynamic-anchorage-induced integrin function.2018

    • Author(s)
      Takaaki A. Tsunoyama, Yusuke Watanabe, Junri Goto, Kazuma Naito, Rinshi S. Kasai, Kenichi G. N. Suzuki, Takahiro K. Fujiwara, Akihiro Kusumi.
    • Journal Title

      Nature Chemical Biology

      Volume: 14 Issue: 5 Pages: 497-506

    • DOI

      10.1038/s41589-018-0032-5

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Revealing the raft domain organization in the plasma membrane by single-molecule imaging of fluorescent ganglioside analogs.2018

    • Author(s)
      Kenichi G. N. Suzuki, Hiromune Ando, Naoko Komura, Akihiro Imamura, Hideharu Ishida, Makoto Kiso, Takahiro K. Fujiwara, Akihiro Kusumi.
    • Journal Title

      Methods in Enzymology

      Volume: 598 Pages: 267-282

    • DOI

      10.1016/bs.mie.2017.06.038

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Native prion protein homodimers are destabilized by oligomeric amyloid beta1-42 species as shown by single-molecule imaging.2018

    • Author(s)
      Sachin S. Tiwari, Yuki M. Shirai, Yuri L. Nemoto, Kumiko Kojima, Kenichi G. N. Suzuki.
    • Journal Title

      Neuroreport

      Volume: 29 Issue: 2 Pages: 106-111

    • DOI

      10.1097/wnr.0000000000000916

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Synthesis of fluorescent gangliosides for the studies of raft domains.2017

    • Author(s)
      Naoko Komura, Kenichi G. N. Suzuki, Hiromune Ando, Miku Konishi, Akihiro Imamura, Hideharu Ishida, Akihiro Kusumi, Makoto Kiso.
    • Journal Title

      Methods in Enzymology

      Volume: 597 Pages: 239-263

    • DOI

      10.1016/bs.mie.2017.06.004

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Development of new ganglioside probes and unraveling of raft domain structure by single-molecule imaging.2017

    • Author(s)
      Kenichi G. N. Suzuki, Hiromune Ando, Naoko Komura, Takahiro K. Fujiwara, Makoto Kiso, Akihiro Kusumi.
    • Journal Title

      Biochim. Biophys. Acta

      Volume: 1861 Issue: 10 Pages: 2494-2506

    • DOI

      10.1016/j.bbagen.2017.07.012

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Raft-based sphingomyelin interactions revealed by new fluorescent sphingomyelin analogs2017

    • Author(s)
      Masanao Kinoshita, Kenichi GN Suzuki, Nobuaki Matsumori, Misa Takada, Hikaru Ano, Kenichi Morigaki, Mitsuhiro Abe, Asami Makino, Toshihide Kobayashi, Koichiro M Hirosawa, Takahiro K Fujiwara, Akihiro Kusumi, Michio Murata
    • Journal Title

      J Cell Biol

      Volume: 未定 Issue: 4 Pages: 1183-1204

    • DOI

      10.1083/jcb.201607086

    • NAID

      120005998045

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] 高精度1分子観察によるラフト組織化と機能の解明2019

    • Author(s)
      鈴木健一
    • Organizer
      第66回脳の医学・生物学研究会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Regulation mechanisms of EGFR activity by gangliosides as revealed by single-molecule imaging.2018

    • Author(s)
      Kenichi Suzuki
    • Organizer
      JAACT2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Regulation mechanisms of EGFR activity by ganglioside homodimer rafts as revealed by single-molecule imaging2018

    • Author(s)
      Kenichi Suzuki
    • Organizer
      The 56th Annual Meeting of the Biophysical Society of Japan.
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 高精度1分子観察によるラフト組織化とシグナル制御機構の解明2018

    • Author(s)
      鈴木健一
    • Organizer
      第40回日本生物学的精神医学会・第61回日本神経化学会大会 合同年会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 細胞膜の組織化と機能:高精度1分子観察による解明2018

    • Author(s)
      鈴木健一
    • Organizer
      第19回運動器科学研究会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 1分子観察によるラフト組織化と機能の解明2018

    • Author(s)
      鈴木健一
    • Organizer
      大阪大学蛋白質研究所セミナー生体膜の生物化学
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 1分子観察で明らかになったガングリオシドクラスター形成とそのEGF受容体活性制御機構2017

    • Author(s)
      鈴木健一
    • Organizer
      ConBio2017
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 細胞膜の組織化と機能:高精度1分子法による解明2017

    • Author(s)
      鈴木健一
    • Organizer
      名古屋大IGERセミナー
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 高精度1分子イメージングで明らかになったラフト組織化と機能2017

    • Author(s)
      鈴木健一
    • Organizer
      第10回セラミド研究会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Unraveling of raft organization and function by single-molecule imaging.2017

    • Author(s)
      Kenichi G. N. Suzuki
    • Organizer
      International seminar on biophysics and chemical biology of biomembranes and lipid bilayers
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 細胞膜上での超高速1分子蛍光観察法2017

    • Author(s)
      鈴木健一
    • Organizer
      第55回日本生物物理学会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 1分子観察で明らかになったガングリオシドのクラスター形成機構とEGF受容体活性制御機構2017

    • Author(s)
      鈴木健一
    • Organizer
      第59回日本脂質生化学会
    • Related Report
      2017 Research-status Report
    • Invited

URL: 

Published: 2017-07-21   Modified: 2020-03-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi