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Study on Prevention of Obesity and Other Metabolic Diseases by mucosal chemosensry Mechanisms in the gastrointestinal tract

Research Project

Project/Area Number 20K11544
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 59040:Nutrition science and health science-related
Research InstitutionYamagata University (2022-2023)
Ritsumeikan University (2020-2021)

Principal Investigator

kuwahara Atsukazu  山形大学, 地域教育文化学部, 客員教授 (60142890)

Co-Investigator(Kenkyū-buntansha) 加藤 郁夫  神戸薬科大学, 薬学部, 教授 (70509843)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords化学物質受容機構 / 腸内分泌細胞 / 腸管神経系 / 上皮イオン輸送 / 脳-腸軸 / 化学物質受容 / 脳腸ペプチド / 胆汁酸受容体 / Gut-Brain axis / 胆汁酸 / TGR5 / インクレチン / ホルモン / 消化管粘膜上皮 / 肥満
Outline of Research at the Start

消化管管腔内には多くの化学物質が存在する。消化管には化学物質を感知し、有用なものは体内に有害なものは体外に排出するための化学物質受容機構が存在する。最近、この化学受容機構の破綻が、肥満や糖尿病などの代謝性疾患、心臓病、あるいは高次脳機能に影響することが明らかになりつつある。この化学物質受容機構は、まず、腸のセンサー細胞にある化学物質受容体や輸送体により感知され、その情報が内分泌系、免疫系及び神経系を介して脳へ情報が送られることで初めて機能する。本研究では、消化管粘膜上皮での化学物質受容機構を明らかにすることで、肥満等代謝性疾患や高次脳機能障害の予防法を確立するための基礎的な知見を提供したい。

Outline of Final Research Achievements

The gastrointestinal (GI) tract has a chemosensory system that accepts chemicals present in the GI lumen and conveys the information to the central nervous system in cooperation with the enteric nervous system, contributing to the control of many physiological functions. Recently, it has become clear that disruption of this chemosensory mechanism affects the onset of various diseases including metabolic syndrome. In this study, we conducted experiments to analyze the receptor and signaling mechanisms of secondary bile acids, which are modified by intestinal bacteria, in order to obtain basic knowledge for establishing preventive methods for obesity-related glucose metabolic diseases and higher brain dysfunction. We found that secondary bile acids stimulate the bile acid receptor TGR5 expressed on enteroendocrine cells, which activates and transmits information to Y2 receptors expressed on VIP-containing nerves.

Academic Significance and Societal Importance of the Research Achievements

本研究成果は、消化管に存在する生体にとり有用なものと有害なものとを区別するための化学物質受容の情報伝達機構の一端を示しており、外部環境に存在する化学物質をどのような機構で認識し、その情報をどのようにして中枢に伝えるのかといった基本的な知見を提出しており、学術的意義も高い。さらに、最近の研究ではこの受容機構の破綻が高次脳機能障害を含む各種疾患の成因の1つであるとの報告が多くなされているため、本研究の成果は肥満等を含むメタボリックシンドロームや高次脳機能障害などの予防のための基礎的な知見を提出するものであり、社会的にも意義ある研究であると考えられる。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (9 results)

All 2023 2022 2021 2020

All Journal Article (9 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 9 results,  Open Access: 9 results)

  • [Journal Article] Mumefural prevents insulin resistance and amyloid-beta accumulation in the brain by improving lowered interstitial fluid pH in type 2 diabetes mellitus2023

    • Author(s)
      2.Hosogi S, Kuwahara A, Kuwahara Y, Tanaka S, Shimamoto C, Tagawa N, Kato I, Yoshimoto K, Aoi W, Takata K, Miyazaki H, Niisato N, Tsubo Y, Yagi K, Nakahari T, Marunaka Y.
    • Journal Title

      Biomedical Research

      Volume: 44 Issue: 1 Pages: 17-29

    • DOI

      10.2220/biomedres.44.17

    • ISSN
      0388-6107, 1880-313X
    • Year and Date
      2023-01-25
    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Secondary bile acid lithocholic acid attenuates neurally evoked ion transport in the rat distal colon2022

    • Author(s)
      TAKAHASHI Kohei、KUWAHARA Yuko、KATO Ikuo、ASANO Shinji、KOZAKAI Takaharu、MARUNAKA Yoshinori、KUWAHARA Atsukazu
    • Journal Title

      Biomedical Research

      Volume: 43 Issue: 6 Pages: 223-239

    • DOI

      10.2220/biomedres.43.223

    • ISSN
      0388-6107, 1880-313X
    • Year and Date
      2022-12-01
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Minimum biological domain of xenin-25 required to induce anion secretion in the rat ileum2022

    • Author(s)
      Kuwahara Yuko、Takahashi Kohei、Akai Miho、Kato Ikuo、Kozakai Takaharu、Asano Shinji、Inui Toshio、Marunaka Yoshinori、Kuwahara Atsukazu
    • Journal Title

      Peptides

      Volume: 147 Pages: 170680-170680

    • DOI

      10.1016/j.peptides.2021.170680

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The effect of Xenin25 on spontaneous circular muscle contractions of rat distal colon in vitro2021

    • Author(s)
      Kuwahara Yuko、Kato Ikuo、Inui Toshio、Marunaka Yoshinori、Kuwahara Atsukazu
    • Journal Title

      Physiological Reports

      Volume: 9 Issue: 4 Pages: 1-14

    • DOI

      10.14814/phy2.14752

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Microbiota-gut-brain axis: enteroendocrine cells and the enteric nervous system form an interface between the microbiota and the central nervous system2020

    • Author(s)
      KUWAHARA Atsukazu、MATSUDA Kyoko、KUWAHARA Yuko、ASANO Shinji、INUI Toshio、MARUNAKA Yoshinori
    • Journal Title

      Biomedical Research

      Volume: 41 Issue: 5 Pages: 199-216

    • DOI

      10.2220/biomedres.41.199

    • NAID

      130007927037

    • ISSN
      0388-6107, 1880-313X
    • Year and Date
      2020-10-16
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The effects of intra-stomach obestatin administration on intestinal contractility in neonatal piglets fed milk formula2020

    • Author(s)
      Slupecka-Ziemilska Monika、Szczurek Paulina、Boryczka Maria、Gajewska Malgorzata、Wychowanski Piotr、Kuwahara Atsukazu、Kato Ikuo、Dziegelewska Zaneta、Wolinski Jaroslaw
    • Journal Title

      PLOS ONE

      Volume: 15 Issue: 3 Pages: 1-13

    • DOI

      10.1371/journal.pone.0230190

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Lipopolysaccharides transport during fat absorption in rodent small intestine2020

    • Author(s)
      Akiba Yasutada、Maruta Koji、Takajo Takeshi、Narimatsu Kazuyuki、Said Hyder、Kato Ikuo、Kuwahara Atsukazu、Kaunitz Jonathan D.
    • Journal Title

      American Journal of Physiology-Gastrointestinal and Liver Physiology

      Volume: 318 Issue: 6 Pages: G1070-G1087

    • DOI

      10.1152/ajpgi.00079.2020

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] GLP-2 Acutely Prevents Endotoxin-Related Increased Intestinal Paracellular Permeability in Rats2020

    • Author(s)
      Maruta Koji、Takajo Takeshi、Akiba Yasutada、Said Hyder、Irie Emi、Kato Ikuo、Kuwahara Atsukazu、Kaunitz Jonathan D.
    • Journal Title

      Digestive Diseases and Sciences

      Volume: 65 Issue: 9 Pages: 2605-2618

    • DOI

      10.1007/s10620-020-06097-6

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Influence of obestatin on the histological development of the small intestine in piglets during the first week of postnatal life2020

    • Author(s)
      Wolinski J.、Szczurek P.、Pierzynowska K.、Wychowanski P.、Seklecka B.、Boryczka M.、Kuwahara A.、Kato I.、Drahanchuk O.、Zaworski K.、Pierzynowski S.G.、Slupecka-Ziemilska M.
    • Journal Title

      Animal

      Volume: 14 Issue: 10 Pages: 2129-2137

    • DOI

      10.1017/s1751731120000919

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research

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Published: 2020-04-28   Modified: 2025-01-30  

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