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The exploration of new physiological function of the non-visual photoreception.

Research Project

Project/Area Number 21K06265
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 44050:Animal physiological chemistry, physiology and behavioral biology-related
Research InstitutionNara Women's University

Principal Investigator

Kawano-Yamashita Emi  奈良女子大学, 自然科学系, 准教授 (80804583)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsロドプシン / 光受容 / 非視覚
Outline of Research at the Start

無顎類ヤツメウナギ脳から、非視覚光受容タンパク質(bPPL)遺伝子を単離し、それが中脳のシェーバーのM5核と呼ばれる神経核に局在することを見出した。このシェーバーのM5核は、脳から網膜へ直接神経投射する遠心性ニューロン(向網膜系ニューロン)で構成されており、脳で受容した光情報が網膜へと伝達されることが示唆された。そこで、本研究では、「脳内で受容した光情報を眼で利用する」という新しい光受容の可能性について検討する。

Outline of Final Research Achievements

Recently, we found a novel deep brain photoreceptor in the lamprey. This photoreceptor is composed of the centrifugal nerve extending the long axons directly to the retina, called the centrifugal retinal neurons. In this study, we investigated the various features of these photoreceptor cells, in order to understand the physiological role of the deep brain photoreceptor. Our findings indicate that the histological characteristics of these photoreceptor cells are similar to those of vertebrate photoreceptors. We also found that the histological features of centrifugal retinal neurons in teleost are comparable to those in lampreys. Moreover, our behavioral analysis of lampreys suggests that non-visual photoreception may play a role in regulating swimming behavior.

Academic Significance and Societal Importance of the Research Achievements

非視覚の光受容はあらゆる動物がもつ共通の機能であるが、それらが局在する領域や生理機能などは動物種によって多様化している。本研究では、ヤツメウナギで発見した新規の脳内光受容器官がどのような機能を担うのか、その機能は脊椎動物で共有するのかを理解するために解析を行った。近年、光環境がもたらす動物への影響が取り上げられる中、非視覚の光受容に大きな注目が集まっている。ヤツメウナギという最も原始的な脊椎動物に着目することで、動物と光の根源的な関係の理解につながると考えられる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (7 results)

All 2023 2022 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (6 results)

  • [Journal Article] Insights into the evolutionary origin of the pineal color discrimination mechanism from the river lamprey2021

    • Author(s)
      Wada Seiji、Kawano-Yamashita Emi、Sugihara Tomohiro、Tamotsu Satoshi、Koyanagi Mitsumasa、Terakita Akihisa
    • Journal Title

      BMC Biology

      Volume: 19 Issue: 1 Pages: 188

    • DOI

      10.1186/s12915-021-01121-1

    • NAID

      120007149260

    • URL

      https://ocu-omu.repo.nii.ac.jp/records/2019688

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 硬骨魚類ミドリフグにおける向網膜系ニューロンの探索2023

    • Author(s)
      寺田咲恵、川野絵美
    • Organizer
      第23回 日本光生物学協会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Histological investigation of the efferent neurons projecting to the retina in the green spotted pufferfish2023

    • Author(s)
      TERADA Sakie. KAWANO-YAMASHITA Emi
    • Organizer
      日本比較生理生化学会 第45回大阪大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Immunohistochemical investigation of the melanopsin-containing cells in the retina of the larval and adult lampreys2023

    • Author(s)
      Emi Kawano-Yamashita, Chisa Nittagawa, Satoshi Tamotsu, Mitsumasa Koyanagi, Akihisa Terakita
    • Organizer
      日本比較生理生化学会 第45回大阪大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Histochemical investigation of the retinal ganglion cells in the retina of the larval and adult lampreys2022

    • Author(s)
      Emi Kawano-Yamashita, Reika Oshita, Satoshi Tamotsu
    • Organizer
      日本比較生理生化学会第44回高知大会
    • Related Report
      2022 Research-status Report
  • [Presentation] ヤツメウナギの成長過程における網膜視細胞の発達の免疫組織化学的解析2021

    • Author(s)
      山下(川野)絵美、保智己
    • Organizer
      日本動物学会第92回オンライン米子大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Immunohistochemical investigation of the development of deep brain photoreceptor in the larval and adult lamprey2021

    • Author(s)
      Emi Kawano-Yamashita, Ryo Kishimoto, Nanaho Yura, Satoshi Tamotsu
    • Organizer
      日本比較生理生化学会第43回札幌オンライン大会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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