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Erasure of LTP and memory by light

Research Project

Project/Area Number 15K06728
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Neurophysiology / General neuroscience
Research InstitutionKyoto University (2017)
Institute of Physical and Chemical Research (2015-2016)

Principal Investigator

Goto Akihiro  京都大学, 医学研究科, 特定助教 (10741332)

Project Period (FY) 2015-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordscofilin / LTP / SuperNova / CALI / Cofilin / 光操作 / 記憶の消去
Outline of Final Research Achievements

We previously found that in the initial phase of LTP, cofilin is transported to the spine, forms a stable complex with F-actin, persistently accumulates at the spine, and consolidates spine expansion. To spatiotemporally regulate cofilin activity during LTP, we introduced CALI (chromophore-assisted light inactivation) system, a technique to inactivate target proteins with light irradiation through reactive oxygen. For this purpose, we generated a fusion protein between cofilin and SuperNova (SN), a protein of GFP family that generates reactive oxygen upon light illumination.
We showed cofilin is critical for maintenance of LTP up to 40 min after induction, and the inactivation of cofilin had negligible effect on LTP induction and the volume of unstimulated spine .
Memory was significantly impaired when 593 nm was irradiated on CA1 neurons expressing CFL-SN after memory task.

Report

(4 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (1 results)

All 2017

All Presentation (1 results)

  • [Presentation] 海馬LTPと記憶の消去を可能とする新規光学技術2017

    • Author(s)
      後藤明弘
    • Organizer
      日本神経科学大会
    • Related Report
      2017 Annual Research Report

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Published: 2015-04-16   Modified: 2019-03-29  

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