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Molecular mechanisms of gastrointestinal hormone secretion by intestinal bacterial metabolites

Research Project

Project/Area Number 17K08529
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field General physiology
Research InstitutionThe University of Tokyo

Principal Investigator

TSUBOI Takashi  東京大学, 大学院総合文化研究科, 教授 (80415231)

Co-Investigator(Kenkyū-buntansha) 北口 哲也  東京工業大学, 科学技術創成研究院, 准教授 (60432374)
Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords開口分泌 / イメージング / 生理学 / シグナル伝達 / 消化管ホルモン
Outline of Final Research Achievements

Glucagon-like peptide-1 (GLP-1), a gastrointestinal hormone, is secreted from enteroendocrine L cells in the small intestine. GLP-1 secretion is induced by various luminal nutrients, including amino acids and intestinal bacterial metabolites. However, the underlying mechanisms of intestinal bacterial metabolites-induced GLP-1 secretion are not well characterized. We investigated the mechanisms underlying the L-glutamine, one of the intestinal bacterial metabolite, induced GLP-1 secretion. We found that taste receptor type 1 member 3 (TAS1R3) was expressed in the L cells. We generated TAS1R3 mutant L cells using the CRISPR/Cas9 sysytem. TAS1R3 mutant L cells did not exhibited L-glutamine-induced GLP-1 secretion. Thus, these results suggest that TAS1R3 plays an important role in L-glutamine-induced GLP-1 secretion.

Academic Significance and Societal Importance of the Research Achievements

食餌由来成分である、糖、脂肪酸、アミノ酸によって小腸内分泌L細胞からグルカゴン様ペプチド-1(GLP-1)の分泌が促進されるが、その詳細な分泌促進分子機構は不明であった。本研究では、アミノ酸の中でもL-グルタミンによって起こるGLP-1分泌の促進が、うまみ受容体や甘味受容体を形成するTAS1R3によって制御されることを見出した。つまりL細胞は、消化管管腔内のケミカルセンサーとして機能している可能性がある。この結果は、GLP-1分泌を促す機能性食品の開発などにつながると考えられる。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (11 results)

All 2020 2019 2018 Other

All Int'l Joint Research (1 results) Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (5 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Int'l Joint Research] University of Bonn(ドイツ)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Green fluorescent protein-based lactate and pyruvate indicators suitable for biochemical assays and live cell imaging.2020

    • Author(s)
      Harada K*, Chihara T*, Hayasaka Y*, Mita M, Takizawa M, Ishida K, Arai M, Tsuno S, Matsumoto M, Ishihara T, Ueda H, Kitaguchi T, Tsuboi T. *Equal contribution
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 1-11

    • DOI

      10.1038/s41598-020-76440-4

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Glutamine-induced signaling pathways via amino acid receptors in enteroendocrine L cell lines2020

    • Author(s)
      Nakamura Takumi、Harada Kazuki、Kamiya Taichi、Takizawa Mai、K?ppers Jim、Nakajima Kazuo、G?tschow Michael、Kitaguchi Tetsuya、Ohta Kunihiro、Kato Tadafumi、Tsuboi Takashi
    • Journal Title

      Journal of Molecular Endocrinology

      Volume: 64 Issue: 3 Pages: 133

    • DOI

      10.1530/jme-19-0260

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Bitter tastant quinine modulates glucagon-like peptide-1 exocytosis from clonal GLUTag enteroendocrine L cells via actin reorganization2018

    • Author(s)
      Harada Kazuki、Sakaguchi Hidekazu、Sada Shoko、Ishida Rika、Hayasaka Yuki、Tsuboi Takashi
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 500 Issue: 3 Pages: 723-730

    • DOI

      10.1016/j.bbrc.2018.04.143

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Bacterial metabolite S-equol modulates glucagon-like peptide-1 secretion from enteroendocrine L cell line GLUTag cells via actin polymerization2018

    • Author(s)
      Harada Kazuki、Sada Shoko、Sakaguchi Hidekazu、Takizawa Mai、Ishida Rika、Tsuboi Takashi
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 501 Issue: 4 Pages: 1009-1015

    • DOI

      10.1016/j.bbrc.2018.05.100

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Transient receptor potential ankyrin 1 channels are involved in spontaneous peptide hormone release from astrocytes2018

    • Author(s)
      Takizawa Mai、Harada Kazuki、Nakamura Kazuaki、Tsuboi Takashi
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 501 Issue: 4 Pages: 988-995

    • DOI

      10.1016/j.bbrc.2018.05.097

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] 腸内環境感受による消化管ホルモン分泌調節機構2019

    • Author(s)
      坪井貴司
    • Organizer
      うま味研究会公開シンポジウム
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] L-グルタミンによるアミノ酸受容体を介したグルカゴン様ペプチド-1分泌制御機構の解明2019

    • Author(s)
      原田一貴, 中村匠, 神谷泰智, 滝澤舞, 中島一夫,北口哲也,太田邦史, 坪井貴司
    • Organizer
      日本分子生物学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Bitter tastant and bacterial metabolite modulate glucagon-like peptide-1 secretion2019

    • Author(s)
      Kazuki Harada, Hidekazu Sakaguchi, Shoko Sada, Takashi Tsuboi
    • Organizer
      第9回アジア・オセアニア生理学会連合大会
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Molecular mechanisms of deoxycholic acid induced glucaton-like peptide-1 secretion2019

    • Author(s)
      Maoko Takashima, Kazuki Harada, Taichi Kamiya, Takashi Tsuboi
    • Organizer
      第9回アジア・オセアニア生理学会連合大会
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 小腸内分泌L細胞に対する苦味物質および腸内細菌代謝産物の消化管ホルモン分泌への影響2018

    • Author(s)
      原田一貴、 阪口秀和、 佐田尚子、 坪井貴司
    • Organizer
      第248回生理学東京談話会
    • Related Report
      2018 Research-status Report

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Published: 2017-04-28   Modified: 2022-01-27  

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