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Targeted neuronal control deep inside the mouse brain by near-infrared wavefront shaping

Research Project

Project/Area Number 19K16188
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 44050:Animal physiological chemistry, physiology and behavioral biology-related
Research InstitutionOkayama University

Principal Investigator

SHIBUKAWA ATSUSHI  岡山大学, 医歯薬学総合研究科, 特任助教 (80823244)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords波面整形 / ホログラフィ / 光散乱 / 空間光変調 / 光遺伝学 / 波面シェイピング / ロドプシン
Outline of Research at the Start

光の集束スポットを用いて神経個体を狙い撃ちで制御することによって,例えば問い①「遺伝子に依存しない神経細胞の個性」や問い②「各動物行動の発現に必要な神経細胞の個数」などを明らかにできる.しかしながら,脳組織は光を激しく散乱させるため,「課題①1mm以上の脳深さに光の集束スポットを形成すること」や「課題②神経制御のための十分な光を脳深部に届けること」が現状物理的に難しい.
本研究では,ガイドスター波面シェイピング(解決策①)とアップコンバージョンナノ粒子(解決策②)を介した近赤外光照射を組み合わせることで上記問題を克服し,世界初のマウス脳最深部~5mmでの神経個体の狙い撃ち制御を目指す.

Outline of Final Research Achievements

In this study, we aimed to combine "guidestar-based optical wavefront shaping" and "the use of near-infrared light via upconversion nanoparticle (UNP)" towards optical focusing spot more than 2 mm deep in the mouse brain". In the first year, we completed the proof of principle experiment for the guidestar wavefront shaping, the preparation of scattering samples that mimic in-vivo mouse brains, the whole-cell patch clamp method. In the second year, we proposed and developed a high-speed one-dimensional spatial light modulator (1D-SLM) as a fundamental device to cope with the sub-millisecond scattering response changes shown by a live mouse brain. We will continue this research next year and challenge the final goal of generating the optical focusing spot in the deep brain of mice.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果である一次元空間光変調器は,最大25MHzのフレームレートを原理的に達成可能であり,このフレームレートは,これまでの世界記録から二桁以上の大幅な改善に相当する.この一次元空間光変調器は,本研究目的でもある「マウス脳深部での光スポット生成」を可能にするだけでなく,例えば,「大画面プロジェクタ」や「高速3D光スポット走査」,「スペクトル整形」,「光空間通信」など他分野へ応用展開できる.すなわち,一次元空間光変調器は,今後様々な分野に波及していくシーズ技術として大きく期待できる.

Report

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

    (5 results)

All 2020 2019

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (1 results)

  • [Journal Article] Green-Sensitive, Long-Lived, Step-Functional Anion Channelrhodopsin-2 Variant as a High-Potential Neural Silencing Tool2020

    • Author(s)
      Kojima Keiichi、Miyoshi Natsuki、Shibukawa Atsushi、Chowdhury Srikanta、Tsujimura Masaki、Noji Tomoyasu、Ishikita Hiroshi、Yamanaka Akihiro、Sudo Yuki
    • Journal Title

      The Journal of Physical Chemistry Letters

      Volume: 11 Issue: 15 Pages: 6214-6218

    • DOI

      10.1021/acs.jpclett.0c01406

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The Unlimited Potential of Microbial Rhodopsins as Optical Tools2020

    • Author(s)
      Kojima K, Shibukawa A, Sudo Y
    • Journal Title

      Biochemistry

      Volume: 59(3) Issue: 3 Pages: 218-229

    • DOI

      10.1021/acs.biochem.9b00768

    • NAID

      120006939595

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Photochemical Characterization of a New Heliorhodopsin from the Gram-Negative Eubacterium Bellilinea caldifistulae (BcHeR) and Comparison with Heliorhodopsin-48C122019

    • Author(s)
      Shibukawa A, Kojima K, Nakajima Y, Nishimura Y, Yoshizawa S, Sudo Y
    • Journal Title

      Biochemistry

      Volume: 58(26) Issue: 26 Pages: 2934-2943

    • DOI

      10.1021/acs.biochem.9b00257

    • NAID

      120006847070

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Quantitation of the neural silencing activity of anion channelrhodopsins in Caenorhabditis elegans and their applicability for long-term illumination2019

    • Author(s)
      Yamanashi T, Maki M, Kojima K, Shibukawa A, Tsukamoto T, Chowdhury S, Yamanaka A, Takagi S, Sudo Y
    • Journal Title

      Sci. Rep.

      Volume: 9(1) Issue: 1 Pages: 7863-7863

    • DOI

      10.1038/s41598-019-44308-x

    • NAID

      120006733902

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Optical focusing and fluorescence imaging through a 2mm thick chicken slice by submillisecond wavefront shaping system2020

    • Author(s)
      Atsushi Shibukawa, Keiichi Kojima, and Yuki Sudo
    • Organizer
      第58回日本生物物理学会年会
    • Related Report
      2020 Annual Research Report

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Published: 2019-04-18   Modified: 2022-01-27  

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