• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

FCoR-Foxo1 Axis Regulates alpha-cell and beta-cell identity

Research Project

Project/Area Number 19K08988
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 InstitutionKeio University

Principal Investigator

Kodani Noriko  慶應義塾大学, 医学部(信濃町), 講師(非常勤) (50625332)

Co-Investigator(Kenkyū-buntansha) 中江 淳  国際医療福祉大学, 医学部, 教授 (00344573)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordsPancreatic islets / Transcription factor / DNA methylation / 膵α細胞 / 膵β細胞 / 糖代謝 / 分化 / 転写因子
Outline of Research at the Start

Foxo1は種々のインスリン感受性臓器において糖・エネルギー代謝に重要な役割を担う転写因子である。当研究室ではFoxo1結合タンパク質Foxo1Corepressor (FCoR)を同定している。FCoRは胎生期より膵β細胞およびα細胞に発現しており、これまでの解析より、FCoRが糖代謝やArxの発現抑制を介したα細胞量の制御に関与すること、FCoRがFoxo1をアセチル化し、その活性を抑制することを認めた。これより、本研究では、Foxo1とFCoRが協調して膵α細胞、β細胞機能の維持に必要である可能性につき、機能解析を進める。

Outline of Final Research Achievements

Pancreatic endocrine cell development into differentiated a- and b-cells is highly regulated and involves multiple transcription factors. However, the mechanisms behind the determination of a- and b-cell masses remain unclear. We have previously shown that Foxo1 CoRepressor (FCoR) inhibits Foxo1 activity by acetylation. Here we show that FCoR regulates the master a-cell regulatory transcription factor, Aristaless related homeobox (Arx), by DNA methylation and controls a-cell mass from the embryonic phase. FcorKO mouse exhibited b-to-a-cell conversion, suggesting that FCoR is also required to maintain b-cell. Our findings suggest that the FCoR-Foxo1 axis regulates pancreatic a-cell and b-cell identity.

Academic Significance and Societal Importance of the Research Achievements

膵内分泌前駆細胞が膵α細胞およびβ細胞へ分化を遂げる過程は厳密にコントロールされており、多くの転写因子が関与する。Foxo1は様々なインスリン感受性臓器において非常に多くの遺伝子の転写活性を制御する。これを可能にしているのが臓器毎に働くFoxo1結合タンパク質であり、FCoRは膵島においてFoxo1結合蛋白として同定された初めてのタンパク質である。したがって、FCoR-Foxo1 axisによる糖代謝の機能解析を行うことにより、糖代謝機構を明らかにしていくことで、糖尿病の病態解明につながる新たな知見を得ることができると考える。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (3 results)

All 2020 2019

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

  • [Journal Article] Tissue-Specific Metabolic Regulation of FOXO-Binding Protein: FOXO Does Not Act Alone2020

    • Author(s)
      Kodani N, Nakae J
    • Journal Title

      Cells

      Volume: 13 Issue: 3 Pages: 1-19

    • DOI

      10.3390/cells9030702

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] FCoR-Foxo1 Axis Regulates α-Cell Mass through Repression of Arx Expression2020

    • Author(s)
      Kodani Noriko、Nakae Jun、Kobayashi Masaki、Kikuchi Osamu、Kitamura Tadahiro、Itoh Hiroshi
    • Journal Title

      iScience

      Volume: 23 Issue: 1 Pages: 100798-100798

    • DOI

      10.1016/j.isci.2019.100798

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Foxo1-CoFRepressor (FCoR) Regulates Pancreatic Alpha- And Beta-cell Identity by both DNA and Histone methylation2019

    • Author(s)
      Noriko Kodani
    • Organizer
      第79回アメリカ糖尿病学会
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi