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Epigenetic functional analysis of histone methyltransferase MLL in pancreatic beta cells

Research Project

Project/Area Number 18K16191
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

YOSHINO SATOSHI  群馬大学, 医学部附属病院, 助教 (90786089)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordsMLL / インスリン分泌 / 糖尿病 / ヒストンメチル化
Outline of Final Research Achievements

We analyzed the involvement of MLL in glucose metabolism in the pancreas using MLL knockout mice. MLL heterozygous mice showed impaired glucose tolerance in IPGTT. However, ITT showed no insulin resistance and decreased insulin secretion during glucose loading. In GSIS tests, Islets isolated from heterozygous mice pancreas have been observed to decrease insulin secretion in the response to glucose stimulation. Histological search showed no decrease in β-cell number, and immunohistological search showed no difference in insulin, glucagon, and TUNEL staining. And also, MLL knockdown was performed in a cultured cell line. The result of insulin secretion was same as mice. Both MLL knockout mice and MLL knockdown cell line, the expression levels of SLC2a1 and SLC2a2 were decreased. In conclusion, MLL attenuates insulin secretion by reducing glucose sensitivity in mouse pancreas.

Academic Significance and Societal Importance of the Research Achievements

本研究で、マウスの膵インスリン分泌細胞においてMLLが欠失することでインスリン分泌能が低下し、MLLがグルコース刺激に対するインスリン分泌に関与する機能を有することを見出した。糖尿病患者ではインスリン分泌が低下していることが知られている。また、MLLはヒストンメチル化酵素や転写制御因子として機能し、代謝に関与する遺伝子領域における機能も報告されている。今後さらなる研究において、MLLの膵インスリン分泌細胞におけるインスリン分泌に関する機能を解明することで、糖尿病治療に対する新たな治療ターゲットとなり創薬につながる可能性がある。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (4 results)

All 2021 2019 2018

All Presentation (4 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] Analysis of novel histone methylase MLL function for glucose metabolism in mouse pancreas2021

    • Author(s)
      吉野 聡
    • Organizer
      ENDO2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Analysis of novel histone methylase MLL function for glucose metabolism in mouse pancreas2021

    • Author(s)
      Satoshi Yoshino, Emi Ishida Kazuhiko Horiguchi, Shunichi Matsumoto, Yasuyo Nakajima, Eijiro Yamada, Shuichi Okada and Masanobu Yamada
    • Organizer
      ENDO2021
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] ヒストンメチル化酵素MLLの膵臓における糖代謝への関与に対する解析2019

    • Author(s)
      吉野 聡
    • Organizer
      第62 回日本糖尿病学会年次学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] ヒストンメチル化酵素MLLの膵臓における糖代謝への関与に対する解析2018

    • Author(s)
      吉野 聡
    • Organizer
      第61 回日本糖尿病学会年次学術集会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2023-01-30  

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