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The effect of bitter taste substances on immune cell migration

Research Project

Project/Area Number 19K16697
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 49070:Immunology-related
Research InstitutionNiigata University

Principal Investigator

Kobayashi Daichi  新潟大学, 医歯学系, 助教 (50805752)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords苦味受容体 / 好中球 / 細胞遊走 / 生体防御 / 好中球動員 / ケモカイン受容体 / 味覚受容体 / 炎症
Outline of Research at the Start

「良薬は口に苦し」は孔子が残した言葉であり、古くから人々は苦い薬には良い治療効果があると信じてきた。一方、医療現場において患者は薬の苦味を不快に感じ、苦味が原因で患者が服薬を中断することがあり、近年の大きな問題の一つとされている。このため、苦味成分が治療に有効であることを科学的に証明し、社会的な理解を得ることは苦味による服薬の中断を予防することにつながる。本研究では苦味物質が抗炎症作用を有することを種々の苦味物質および、苦味受容体欠損細胞を用いて解析を行い、苦味による治療効果の可能性を追求する。

Outline of Final Research Achievements

It is well accepted that bitter taste receptors, Tas2Rs, are expressed in taste bud cells to detect bitter taste substances in the oral cavity. Growing evidence indicates that Tas2Rs are also expressed extraorally, including in airway smooth muscle cells, intestinal tuft cells, and immune cells. However, the roles of Tas2Rs in the extra-oral cells remain uncertain. We found that Tas2R126, Tas2R135, and Tas2R143 are expressed in mouse neutrophils. We also found that Tas2R126/143 signaling enhances chemokine-induced neutrophil migration through ROCK-MLC2 dependent pathway.

Academic Significance and Societal Importance of the Research Achievements

「良薬は口に苦し」は孔子が遺した言葉であり、古くから人々は苦い薬には良い治療効果があることと信じてきた。一方、医療現場では患者が薬の苦味を不快に感じ、苦味が原因で患者は服薬を中断することがあり、医療問題の一つとされている。このため、苦味成分が治療に有効であることを見つけ出すことは、苦味による服薬中断の予防につながる。
本研究により、特定の苦味受容体のシグナリングが生体防御に関わる好中球遊走を促進させることを見出し、新たな免疫賦活経路を発見した。本研究を進展させることで、苦味成分を用いた感染症予防法確立につながることが期待される。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (8 results)

All 2023 2022 2021 2020 2019 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Remarks (1 results)

  • [Journal Article] The role of extracellular ATP in homeostatic immune cell migration2023

    • Author(s)
      Kobayashi Daichi、Umemoto Eiji、Miyasaka Masayuki
    • Journal Title

      Current Opinion in Pharmacology

      Volume: 68 Pages: 102331-102331

    • DOI

      10.1016/j.coph.2022.102331

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Tas2R signaling enhances mouse neutrophil migration via a ROCK-dependent pathway2022

    • Author(s)
      Kobayashi Daichi、Watarai Tomoya、Ozawa Madoka、Kanda Yasuhiro、Saika Fumihiro、Kiguchi Norikazu、Takeuchi Arata、Ikawa Masahito、Matsuzaki Shinsuke、Katakai Tomoya
    • Journal Title

      Frontiers in Immunology

      Volume: 13 Pages: 973880-973880

    • DOI

      10.3389/fimmu.2022.973880

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Chemogenetic Regulation of CX3CR1-Expressing Microglia Using Gi-DREADD Exerts Sex-Dependent Anti-Allodynic Effects in Mouse Models of Neuropathic Pain2020

    • Author(s)
      Fumihiro Saika, Shinsuke Matsuzaki, Daichi Kobayashi, Yuya Ideguchi, Tomoe Y Nakamura, Shiroh Kishioka, Norikazu Kiguchi
    • Journal Title

      Frontiers in Pharmacology

      Volume: 11 Pages: 925-925

    • DOI

      10.3389/fphar.2020.00925

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Insufficient efferocytosis by M2-like macrophages as a possible mechanism of neuropathic pain induced by nerve injury.2020

    • Author(s)
      Kobayashi D, Kiguchi N, Saika F, Kishioka S, Matsuzaki S.
    • Journal Title

      Biochem Biophys Res Commun

      Volume: Epub Issue: 1 Pages: 216-223

    • DOI

      10.1016/j.bbrc.2020.02.032

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 苦味物質による免疫応答制御機構2022

    • Author(s)
      小林大地
    • Organizer
      日本食品免疫学会 第18回学術大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 苦味受容体を介した好中球遊走促進機構2021

    • Author(s)
      小林 大地, 任田 篤正, 小澤 まどか, 神田 泰洋, 竹内 新, 雑賀 史浩, 木口 倫一, 松崎 伸介, 片貝 智哉
    • Organizer
      第94回日本薬理学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Efferocytosis mediated anti-inflammatory responses are restricted at the site of peripheral nerve injury2019

    • Author(s)
      Daichi Kobayashi, Norikazu Kiguchi, Fumihiro Saika, Shiroh Kishioka, Shinsuke Matsuzaki
    • Organizer
      第17回 国際免疫学会2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Remarks] Reserachmap

    • URL

      https://researchmap.jp/kobayashi1988/published_papers

    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2024-12-25  

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