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Genetic tracing to reveal the whole brain mapping of taste information processing

Research Project

Project/Area Number 21K09828
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 57010:Oral biological science-related
Research InstitutionHiroshima University

Principal Investigator

SUGITA Makoto  広島大学, 医系科学研究科(歯), 教授 (50235884)

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: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords味覚 / ニューロン / 発生工学的トレーシング
Outline of Research at the Start

口腔内の異なる味細胞で感知される苦味と甘味の情報は脳内へ伝達され、苦味感覚は忌避性行動と不快情動を惹起し、甘味感覚は嗜好性行動と快的情動を惹起します。本研究では苦味情報と甘味情報を伝える脳内の神経回路を可視化しながら、各脳領域に局在する苦味ニューロン同士、及び甘味ニューロン同士が選択的に連結し、異なる苦味経路と甘味経路を構築する機構や、苦味情報・甘味情報を選択的に伝達し処理する機構、および各脳領域の苦味・甘味経路ニューロンが苦味・甘味刺激による対照的な行動・情動応答の惹起に果たす役割を明らかにします。

Outline of Final Research Achievements

Genetic tracing was combined with immunohistochemistry to functionally characterize bitter taste-relaying neurons in the PBN and the amygdala, which were labeled by the transneuronal tracer tWGA-DsRed originating from T2R-expressing taste receptor cells. In the PBN, the tWGA-DsRed-labeled neurons were located rostrally in the external lateral PBN, and caudally in the medial PBN. The tWGA-DsRed-labeled neurons in the medial and the external lateral PBN exhibited the distinct immunoreactivity to CGRP and substance P, suggesting differences in the neuron types between the neurons in the medial and external lateral PBN. The tWGA-DsRed-labeled neurons were also located in the medial amygdala. Subsets of tWGA-DsRed-labeled, bitter taste-relaying neurons in the medial amygdala enhanced their excitatory responses to the conditioned stimulus saccharin after conditioned taste aversion learning.

Academic Significance and Societal Importance of the Research Achievements

発生工学的トレーシングを用い、特定の味細胞に選択的に経ニューロン性トレーサーを発現させることにより、特定の味細胞を起始点とする味覚経路ニューロンを上行性経路に沿って標識・可視化することが可能となる。それにより特定の味覚経路ニューロンを可視化限定して、細胞機能を解析することができ、特定の味覚経路ニューロンに選択的に作用する薬剤を選出することが可能となる。そして特定の味覚経路ニューロンが保有する細胞機能・分子機能を標的として、味覚異常、味覚誘発行動の異常、情動障害、拒食・過食への新しい治療法が創出される。

Report

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

    (12 results)

All 2024 2023 2022 2021

All Journal Article (6 results) (of which Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (6 results)

  • [Journal Article] Involvement of sodium-glucose cotransporter-1 activities in maintaining oscillatory Cl- currents from mouse submandibular acinar cells2024

    • Author(s)
      Takeyasu M, Kozai K, Sugita M
    • Journal Title

      J Comp Physiol B

      Volume: 194 Issue: 1 Pages: 21-32

    • DOI

      10.1007/s00360-024-01532-w

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Resting saliva volume as a risk factor for hypogeusia: A retrospective study2023

    • Author(s)
      Shintani T, Naito M, Obayashi N, Ando T, Kawaguchi H, Yanamoto S, Kajiya M, Sugita M
    • Journal Title

      Physiol Behav

      Volume: 267 Pages: 114224-114224

    • DOI

      10.1016/j.physbeh.2023.114224

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Taste-taste associations in chemotherapy-induced subjective taste alterations: findings from a questionnaire survey in an outpatient clinic2023

    • Author(s)
      Obayashi N, Sugita M, Shintani T, Nishi H, Ando T, Kajiya M, Kawaguchi H, Ohge H, Naito M
    • Journal Title

      Support Care Cancer

      Volume: 31 Issue: 9 Pages: 552-552

    • DOI

      10.1007/s00520-023-08013-w

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 栄養と脳の発生・発達2023

    • Author(s)
      酒寄信幸, 杉田誠
    • Journal Title

      精神科

      Volume: 42 Pages: 442-449

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Effect of irinotecan administration on amiloride-sensitive sodium taste responses in mice2023

    • Author(s)
      Obayashi N, Sakayori N, Kawaguchi H, Sugita M
    • Journal Title

      Eur J Oral Sci

      Volume: 131 Issue: 2

    • DOI

      10.1111/eos.12922

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Characterization of the fatty acid profile in the ventral midbrain of mice exposed to dietary imbalance between omega-6 and omega-3 fatty acids during specific life stages2022

    • Author(s)
      Sakayori N, Katakura M, Setogawa S, Sugita M, Kobayashi K
    • Journal Title

      BMC Res Notes

      Volume: 15 Issue: 1 Pages: 285-285

    • DOI

      10.1186/s13104-022-06175-0

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] The chemotherapeutic agent irinotecan impairs amiloride-sensitive sodium taste responses in mice2024

    • Author(s)
      Makoto Sugita, Nobuyuki Sakayori, Hiroyuki Kawaguchi, Nami Obayashi
    • Organizer
      第101回日本生理学会大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 発生工学的トレーシングにより可視化限定された扁桃体ニューロンの味覚嫌悪学習獲得時と消去学習後における味覚条件刺激への応答2023

    • Author(s)
      杉田 誠
    • Organizer
      第65回歯科基礎医学会学術大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Functional characterization of bitter taste-relaying neurons in the parabrachial nuclei2023

    • Author(s)
      Makoto Sugita, Kuniyo Yamamoto
    • Organizer
      第100回日本生理学会大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 発生工学的トレーシングにより可視化された扁桃体内側核の苦味経路ニューロンで観察される味覚嫌悪学習後の甘味刺激への反応性変化2022

    • Author(s)
      杉田 誠
    • Organizer
      第64回歯科基礎医学会学術大会
    • Related Report
      2022 Research-status Report
  • [Presentation] Plastic changes in activities of bitter taste-relaying neurons in the medial amygdala during conditioned taste aversion learning2022

    • Author(s)
      Makoto Sugita, Chieh-Mei Chang
    • Organizer
      第99回日本生理学会大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 発生工学的トレーシングにより表出される扁桃体ニューロン活動の味覚嫌悪学習時の可塑性変化2021

    • Author(s)
      杉田 誠、Chieh-Mei Chang
    • Organizer
      第73回日本生理学会中国四国地方会
    • Related Report
      2021 Research-status Report

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

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