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Investigation into mechanisms of preference decision-making occurring in the brain through analyses of gustatory second-order neurons

Research Project

Project/Area Number 18K14753
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 InstitutionNational Institute of Genetics

Principal Investigator

Miyazaki Takaaki  国立遺伝学研究所, 遺伝メカニズム研究系, 特任研究員 (00777807)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords味覚 / 好き・嫌い / 神経回路 / 脳・神経系の情報処理 / 動物生理学 / 動物行動学 / キイロショウジョウバエ / 選好 / 二次神経細胞 / ショウジョウバエ / 蛍光in vivoイメージング / 選好判断 / 二次神経回路
Outline of Final Research Achievements

In fruitfly, gustatory sensory neurons relay taste information from the mouth to the brain. 2nd-order neurons, which receive the taste information from the sensory neurons, are supposed to control behaviors occurring upon the taste sensation. I previously searched for 2nd-order neurons downstream of the sensory neurons that respond to stimuli of sweetness, and then successfully identified 15 types of such neurons. However, their roles in the behavioral control were still unclarified.
In this research, I obtained results that suggest the previously-identified 2nd-order neurons cover almost all populations of neurons that receive information of sweetness. In addition, for two of the 15 types of the gustatory 2nd-order neurons, I established a genetic method to manipulate only the 2nd-order neurons without side-effects on other neurons and cells.

Academic Significance and Societal Importance of the Research Achievements

研究代表者が同定した神経細胞が甘味の情報を受け取る細胞の全てをカバーすることから、甘味による行動にはこれらのうちの何れかが関わることになる。味覚二次神経細胞だけを操作する手法を使えば、それらの細胞の味覚行動における役割を調べられる。これらのことから、本研究により、甘味の感知が様々な行動を惹き起こすまでの過程を調べることが、今後、可能になったと言える。
ハエの研究は、遺伝の法則、受精卵から動物の身体ができるまでの過程、体内時計など、動物に共通する現象の仕組みを明らかにしてきた。本研究と今後になされる研究も、人間を含む動物が甘味から「好き」に対応する行動を起こす仕組みの理解に貢献すると期待される。

Report

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

    (12 results)

All 2020 2019 2018 Other

All Int'l Joint Research (3 results) Presentation (9 results) (of which Int'l Joint Research: 4 results)

  • [Int'l Joint Research] HHMI Janelia Research Campus(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] HHMI Janelia Research Campus(米国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] HHMI Janelia Research Campus(米国)

    • Related Report
      2018 Research-status Report
  • [Presentation] Genetic drivers to label specific subsets of postsynaptic partners of sugar-sensitive gustatory sensory neurons of Drosophila2020

    • Author(s)
      宮崎 隆明, 林 子暘, 李 奇鴻, マーク ストッファー, 伊藤 啓, 鈴木 えみ子
    • Organizer
      APDRC5 (5th Asia-Pacific Drosophila Research Conference)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Comprehensive catalog of postsynaptic partners of sugar-sensitive gustatory sensory neurons of Drosophila2019

    • Author(s)
      宮崎 隆明, 林 子暘, 李 奇鴻, マーク ストッファー, 伊藤 啓, 鈴木 えみ子
    • Organizer
      NEURO2019(第42回日本神経科学大会/第62回日本神経化学会大会)
    • Related Report
      2019 Research-status Report
  • [Presentation] Comprehensive set of genetic drivers to label gustatory second-order neurons in Drosophila2019

    • Author(s)
      宮崎 隆明, 林 子暘, 李 奇鴻, マーク ストッファー, 伊藤 啓, 鈴木 えみ子
    • Organizer
      48th Naito Conference on “Integrated Sensory Sciences ― Pain, Itch, Smell and Taste”
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] A genetic tool to label almost all subpopulation of postsynaptic neurons directly-connected to sugar-responsive sensory neurons in Drosophila2019

    • Author(s)
      宮崎 隆明, 林 子暘, 李 奇鴻, マーク ストッファー, 伊藤 啓, 鈴木 えみ子
    • Organizer
      第18回国際シンポジウム「味覚嗅覚の分子神経機構」
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] In vivo imaging to record neural activity of first- and second-order neurons in the gustatory system2018

    • Author(s)
      宮崎 隆明、林 子暘、李 奇鴻、マーク ストッファー、伊藤 啓、鈴木 えみ子
    • Organizer
      第13回日本ショウジョウバエ研究会
    • Related Report
      2018 Research-status Report
  • [Presentation] Genetic identification and live imaging of gustatory 2nd-order neurons that link sugar detection and feeding/reward systems in Drosophila2018

    • Author(s)
      宮崎 隆明、林 子暘、李 奇鴻、マーク ストッファー、伊藤 啓、鈴木 えみ子
    • Organizer
      ECRO 2018 (28th Annual Meeting of the European Chemoreception Research Organization)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Tastant delivery system to provide reproducible stimulation to the mouth of Drosophila2018

    • Author(s)
      宮崎 隆明、林 子暘、李 奇鴻、マーク ストッファー、伊藤 啓、鈴木 えみ子
    • Organizer
      第41回日本神経科学大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Genetic identification of gustatory second-order neurons to dissect information processing between the taste sensory system and the feeding/reward systems in Drosophila2018

    • Author(s)
      宮崎 隆明、林 子暘、李 奇鴻、マーク ストッファー、伊藤 啓、鈴木 えみ子
    • Organizer
      第17回国際シンポジウム「味覚嗅覚の分子神経機構」
    • Related Report
      2018 Research-status Report
  • [Presentation] 味覚と摂食、味覚と報酬の間にある神経回路を解き明かす2018

    • Author(s)
      宮崎 隆明
    • Organizer
      昆虫脳コネクトーム研究 若手研究発表会
    • Related Report
      2018 Research-status Report

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

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