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The mechanism of salt taste perception by a novel subpopulation of taste bud cells

Research Project

Project/Area Number 21K14801
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 38050:Food sciences-related
Research InstitutionTokyo University of Agriculture and Technology

Principal Investigator

KOZONO Takuma  東京農工大学, 学内共同利用施設等, 特任助教 (20876180)

Project Period (FY) 2021-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
KeywordsJaw1 / イノシトール三リン酸受容体 / カルシウムシグナリング / 味蕾細胞 / 塩味感知 / 味覚
Outline of Research at the Start

塩分の過剰摂取が、心臓病や脳卒中、腎臓病など種々の疾患のリスクファクターになることは周知の事実であり、人生100年時代とも言われる現代において、味覚を正常に保ちながら、食による健康を維持・増進していくことは重要である。しかし、塩味の感知、さらに、味覚障害の発症機序及び病態における詳細な分子メカニズムは不明な点が多い。本研究では、オルガノイド培養や味蕾細胞株を用いた塩味感知経路の解明、さらに、シングルセルトランスクリプトーム解析を用いた味覚障害の発症機序と病態の理解を目指す。

Outline of Final Research Achievements

Of the five basic tastes: sweet, bitter, umami, sour, and salty, the details of the taste bud cell responsible for the salt taste perception and their molecular mechanisms are not yet completely understood. In this study, we demonstrated that the interaction of Jaw1, which is specifically expressed in the subpopulation of taste bud cells, with the type III inositol trisphosphate receptor (ITPR3) enhances the calcium release from the endoplasmic reticulum upon G protein-coupled receptor stimulation. In addition, the calcium assay using taste bud cells isolated from the mouse tongue suggests that Jaw1-positive taste bud cells are one of the cells responsible for salt taste perception. Single-cell transcriptomics of taste bud cells also revealed several genes specifically expressed in Jaw1-positive taste bud cells.

Academic Significance and Societal Importance of the Research Achievements

本研究において、塩味の感知を担う細胞集団とそのメカニズムの一端を明らかにしたことは、複雑な味覚機能の理解を進める上で学術的貢献度が高く、この理解の更なる深化は塩分の過剰摂取を防ぐための食事方法の提案や味覚障害の治療法の開発等に寄与する可能性があり社会的意義も大きい。また、シングルセルレベルでの網羅的な遺伝子発現解析により得られた知見も元にすると、味蕾細胞集団の分類を従来よりもさらに細分化させた視点も踏まえながら、味覚機能に関する研究を進めることが今後期待される。

Report

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

    (10 results)

All 2023 2022 Other

All Int'l Joint Research (1 results) Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results,  Open Access: 4 results) Presentation (3 results)

  • [Int'l Joint Research] チューリッヒ応用科学大学(スイス)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Jaw1/LRMP is associated with the maintenance of Golgi ribbon structure2023

    • Author(s)
      Okumura Wataru、Tadahira Kazuko、Kozono Takuma、Tamura-Nakano Miwa、Sato Hiroyuki、Matsui Hitomi、Dohi Taeko、Rohrer Jack、Tonozuka Takashi、Nishikawa Atsushi
    • Journal Title

      The Journal of Biochemistry

      Volume: 173 Issue: 5 Pages: 383-392

    • DOI

      10.1093/jb/mvad004

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Cleavage of the Jaw1 C-terminal region enhances its augmentative effect on the Ca2+ release via IP3 receptors2023

    • Author(s)
      Kozono Takuma、Jogano Chifuyu、Okumura Wataru、Sato Hiroyuki、Matsui Hitomi、Takagi Tsubasa、Okumura Nobuaki、Takao Toshifumi、Tonozuka Takashi、Nishikawa Atsushi
    • Journal Title

      Journal of Cell Science

      Volume: 136 Issue: 4

    • DOI

      10.1242/jcs.260439

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Jaw1/LRMP increases Ca2+ influx upon GPCR stimulation with heterogeneous effect on the activity of each ITPR subtype2022

    • Author(s)
      Okumura Wataru、Kozono Takuma、Sato Hiroyuki、Matsui Hitomi、Takagi Tsubasa、Tonozuka Takashi、Nishikawa Atsushi
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 9476-9476

    • DOI

      10.1038/s41598-022-13620-4

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structural basis for proteolytic processing of Aspergillus sojae α-glucosidase L with strong transglucosylation activity2022

    • Author(s)
      Ding Yifu、Oyagi Ayako、Miyasaka Yuki、Kozono Takuma、Sasaki Nobumitsu、Kojima Yuka、Yoshida Makoto、Matsumoto Yuji、Yasutake Nozomu、Nishikawa Atsushi、Tonozuka Takashi
    • Journal Title

      Journal of Structural Biology

      Volume: 214 Issue: 3 Pages: 107874-107874

    • DOI

      10.1016/j.jsb.2022.107874

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Novel protocol to observe the intestinal tuft cell using transmission electron microscopy2022

    • Author(s)
      Kozono Takuma、Tamura-Nakano Miwa、Kawamura Yuki I.、Tonozuka Takashi、Nishikawa Atsushi
    • Journal Title

      Biology Open

      Volume: 11 Issue: 2

    • DOI

      10.1242/bio.059007

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Enzymatic and structural characterization of β-fructofuranosidase from the honeybee gut bacterium Frischella perrara2022

    • Author(s)
      Kubota, A., Kawai, R., Li, D., Kozono, T., Sasaki, N., Nishikawa, A., Fujii, T., Tochio, T., Tonozuka, T.
    • Journal Title

      Appl. Microbiol. Biotechnol.

      Volume: 106 Issue: 7 Pages: 2455-2470

    • DOI

      10.1007/s00253-022-11863-9

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 小腸上皮タフト細胞におけるJaw1の機能解析と寄生虫感染応答機構の理解の深化2022

    • Author(s)
      小薗 拓馬、佐藤 展之、中野(田村)美和、岡村 匡史、中野 堅太、奥村 航、石渡 賢治、河村 由紀、殿塚 隆史、西河 淳
    • Organizer
      日本生化学会大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Jaw1のC末端切断修飾の切断部位と酵素の同定2022

    • Author(s)
      小薗 拓馬、城ヶ野 千冬、奥村 航、佐藤 展之、奥村 宣明、高尾 敏文、殿塚 隆史、西河 淳
    • Organizer
      日本細胞生物学会
    • Related Report
      2021 Research-status Report
  • [Presentation] Jaw1はITPRsとの相互作用を介して細胞内Ca2+シグナルの振幅を制御する2022

    • Author(s)
      奥村 航、松井 仁美、小薗 拓馬、佐藤 展之、高木 翼、殿塚 隆史、西河 淳
    • Organizer
      日本細胞生物学会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2024-01-30  

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