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Elucidation of the mechanism of pancreatic alfa cell mass increase and white adipocyte browning induced by a low-carbohydrate/high-protein diet

Research Project

Project/Area Number 18K08516
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 54040:Metabolism and endocrinology-related
Research InstitutionYamaguchi University

Principal Investigator

Okuya Shigeru  山口大学, 教育・学生支援機構, 教授 (20214083)

Co-Investigator(Kenkyū-buntansha) 田部 勝也  山口大学, 医学部附属病院, 講師 (00397994)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywordsグルカゴン / 膵α細胞 / 低炭水化物 / 高蛋白質 / 新生 / 高蛋白 / 褐色脂肪細胞
Outline of Final Research Achievements

It is unclear how pancreatic endocrine cells behave in response to nutritional changes. When mice were loaded with a low-carbohydrate/high-protein diet (LC/HP diet) for 1 to 2 weeks, there was no significant difference in blood glucose levels compared to the control diet group. But, it was confirmed that (1) decrease of hepatic glycogen content, (2) increased blood glucagon and decreased insulin, (3) increase of pancreatic glucagon-positive α cell volume, and (4) increment of α cell mass mainly around the pancreatic duct and α cell appearance around the pancreatic islets in the vicinity. Furthermore, (5) hepatic afferent vagotomy and pancreatic sympathetic neuropharmacological blockade completely suppressed the appearance of α cell population and increase in cell mass. Therefore, it was found that there is a new control mechanism of pancreatic α cell mass via a neural network originating from the liver.

Academic Significance and Societal Importance of the Research Achievements

今回の我々の研究により、比較的短期間のLC/HP食で誘導される、代謝臓器である肝臓を起点とする神経ネットワークを介した新たな膵α細胞量制御機構が存在することが判明した。さらに、膵管近傍細胞から分化・新生したα細胞は、交感神経系を介したα細胞新生・増殖であり、この様な報告は未だされておらず、これは“膵α細胞量の調節機構”を解明する上で貴重なモデルと考えられる。さらに、膵管結紮モデルでの観察より膵幹細胞は傍膵管のfocal areaに存在するといわれており、我々の観察はそれを裏付けている可能性がある。このモデルを解析することで、自律神経を介した新たな膵内分泌機能制御の解明が期待される。

Report

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

    (19 results)

All 2021 2020 2019 2018

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (16 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] Islet cell dedifferentiation is a pathologic mechanism of long-standing progression of type 2 diabetes.2021

    • Author(s)
      Amo-Shiinoki K, Tanabe K, Hoshii Y, Matsui H, Harano R, Fukuda T, Takeuchi T, Bouchi R, Takagi T, Hatanaka M, Takeda K, Okuya S, Nishimura W, Kudo A, Tanaka S, Tanabe M, Akashi T, Yamada T, Ogawa Y, Ikeda E, Nagano H, Tanizawa Y.
    • Journal Title

      JCI Insight

      Volume: 6 Issue: 1 Pages: 143791-143791

    • DOI

      10.1172/jci.insight.143791

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Importance of Intestinal Environment and Cellular Plasticity of Islets in the Development of Postpancreatectomy Diabetes.2021

    • Author(s)
      Fukuda T, Bouchi R, Takeuchi T, Amo-Shiinoki K, Kudo A, Tanaka S, Tanabe M, Akashi T, Hirayama K, Odamaki T, Igarashi M, Kimura I, Tanabe K, Tanizawa Y, Yamada T, Ogawa Y
    • Journal Title

      Diabetes Care

      Volume: 44(4) Issue: 4 Pages: 1002-1011

    • DOI

      10.2337/dc20-0864

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Activation of GLP-1 receptor signaling alleviates cellular stresses and improves beta cell function in a mouse model of Wolfram syndrome.2018

    • Author(s)
      Kondo M, Tanabe K, Amo-Shiinoki K, Hatanaka M, Morii T, Takahashi H, Seino S, Yamada Y, Tanizawa Y
    • Journal Title

      Diabetologia

      Volume: 61 Issue: 10 Pages: 2189-2201

    • DOI

      10.1007/s00125-018-4679-y

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] 八味地黄丸は脂肪組織での熱産生を亢進する2020

    • Author(s)
      香川正太、田部勝也、古賀貴之、越智啓行、市来 唯、福山彰吾、鈴木早織、水津菜月、木村郁子、長島史裕
    • Organizer
      第63回日本糖尿病学会年次学術集会、大津
    • Related Report
      2020 Annual Research Report
  • [Presentation] 膵β細胞脱分化は2型糖尿病の病態進展に関連する2020

    • Author(s)
      椎木幾久子、田部勝也、幡中雅行、奥屋 茂、福田達也、竹内崇人、坊内良太郎、山田哲也、小川佳宏、谷澤幸生
    • Organizer
      第63回日本糖尿病学会年次学術集会、大津
    • Related Report
      2020 Annual Research Report
  • [Presentation] Wolfram症候群をモデルとした細胞内ストレスによる膵β細胞可塑性制御の解明2019

    • Author(s)
      椎木幾久子、田部勝也、西村 渉、幡中雅行、佐藤吉彦、駒津光久、増谷 弘、谷澤幸生
    • Organizer
      第62回日本糖尿病学会年次学術集会、仙台
    • Related Report
      2019 Research-status Report
  • [Presentation] インスリンシグナル伝達病と希少・難治疾患における糖尿病 Wolfram症候群Uo To Date2019

    • Author(s)
      谷澤幸生、田部勝也、椎木幾久子、松永仁恵
    • Organizer
      第62回日本糖尿病学会年次学術集会、仙台
    • Related Report
      2019 Research-status Report
  • [Presentation] 膵島細胞の可塑性と糖尿病における意義 Wfs1欠損により引き起こされたβ細胞機能不全の機序としての膵β細胞可塑性2019

    • Author(s)
      田部勝也、椎木幾久子、幡中雅行、西村 渉、増谷 弘、谷澤幸生
    • Organizer
      第62回日本糖尿病学会年次学術集会、仙台
    • Related Report
      2019 Research-status Report
  • [Presentation] 膵β細胞機能の新たなメッセンジャー:その生理と病態 WFS1遺伝子とβ細胞機能2019

    • Author(s)
      谷澤幸生、太田康晴、田部勝也、田口昭彦、椎木幾久子、秋山 優、幡中雅行
    • Organizer
      第62回日本糖尿病学会年次学術集会、仙台
    • Related Report
      2019 Research-status Report
  • [Presentation] 高齢糖尿病患者の認知機能評価におけるMRI・MRAと早期アルツハイマー型認知症支援ソフトVSRADスコアの有用性の検討2019

    • Author(s)
      奥屋 茂、浅江文枝、下瀬茂美、秋山 優、田部勝也、谷澤幸生、古川又一
    • Organizer
      第62回日本糖尿病学会年次学術集会、仙台
    • Related Report
      2019 Research-status Report
  • [Presentation] 膵β細胞脱分化は糖尿病患者の膵β細胞不全に関連する2019

    • Author(s)
      椎木幾久子、田部勝也、佐藤吉彦、駒津光久、奥屋 茂、谷澤幸生
    • Organizer
      第69回日本体質医学会総会、下関
    • Related Report
      2019 Research-status Report
  • [Presentation] Activation of GLP-1 receptor signaling prevents beta cell dedifferentiation in a mouse model of Wolfram syndrome through modulating Txnip expression.2019

    • Author(s)
      Tanabe K, Amo-Shiinoki K, Kondo M, Hatanaka M, Masutani M, Tanizawa Y
    • Organizer
      79th American Diabetes Association Scientific Sessions. San Francisco, USA
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Metabolic dysregulation by cellular stress is implicated in the dedifferentiation and dysfunction of pancreatic beta cells.2019

    • Author(s)
      Tanizawa Y, Tanabe K, Amo-Shiinoki K
    • Organizer
      55th Annual Meeting of the European Association for the Study of Diabetes. Barcelona, Spain
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] β細胞研究の進歩 Wolfram症候群をモデルとしたストレス病態における膵β細胞可塑性制御の解明.2018

    • Author(s)
      田部勝也
    • Organizer
      第91回日本内分泌学会学術総会
    • Related Report
      2018 Research-status Report
  • [Presentation] Metabolic insufficiency caused by cellular stresses is implicated to beta cell dedifferentiation in a mouse model of Wolfram syndrome.2018

    • Author(s)
      Amo-Shiinoki K, Tanabe K, Hatanaka M, Masutani H, Tanizawa Y
    • Organizer
      The ADA 78th Scientific Sessions
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Metabolic insufficiency caused by cellular stresses is implicated to beta cell dedifferentiation in a mouse model of Wolfram syndrome.2018

    • Author(s)
      Amo-Shiinoki K, Tanabe K, Hatanaka M, Masutani H, Tanizawa Y
    • Organizer
      The 54th EASD Annual Meeting
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 時計遺伝子E4BP4/DBPの膵β細胞における役割の解明.2018

    • Author(s)
      田口昭彦, 太田康晴, 松村卓郎, 中林容子, 秋山 優, 山本 薫, 藤本留理子, 末冨吏佐, 柳井章江, 篠田 晃, 奥屋 茂, 谷澤幸生
    • Organizer
      日本糖尿病学会中国四国地方会第56回総会
    • Related Report
      2018 Research-status Report
  • [Presentation] 健康成人における朝と夜の糖代謝の比較検討.2018

    • Author(s)
      藤本留理子, 太田康晴, 松村卓郎, 田口昭彦, 山本 薫, 秋山 優, 竹田孔明, 奥屋 茂, 谷澤幸生
    • Organizer
      日本糖尿病学会中国四国地方会第56回総会
    • Related Report
      2018 Research-status Report
  • [Presentation] Wolfram症候群をモデルとした細胞内ストレスによる膵β細胞可塑性制御の解明.2018

    • Author(s)
      椎木幾久子, 田部勝也, 幡中雅行, 谷澤幸生
    • Organizer
      日本糖尿病学会中国四国地方会第56回総会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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