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

Elucidation of the mechanism of androgen regulation of skeletal muscle using integrative analysis

Research Project

Project/Area Number 19K19947
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 59020:Sports sciences-related
Research InstitutionEhime University

Principal Investigator

Sakai Hiroshi  愛媛大学, プロテオサイエンスセンター, 助教 (00820804)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsアンドロゲン / 男性ホルモン / アンドロゲン受容体 / 骨格筋 / 筋再生 / 骨格筋幹細胞 / サテライト細胞 / 幹細胞 / Pax7 / 性ホルモン / サルコペニア / 筋肥大
Outline of Research at the Start

高齢者におけるQuality of lifeが低下する原因の一つは、加齢による骨格筋量と筋力の低下(サルコペニア)である。男性ホルモン(アンドロゲン)の投与によって、筋肉が増強されるため、アンドロゲン補充治療は、サルコペニアの治療法として期待されてきたが、その副作用ゆえに臨床的に用いられることはほとんどない。さらに驚くべきことに、実際にヒトに投与されているのにもかかわらず、アンドロゲンの骨格筋に対する作用機序は、ほとんど解明されていない。そのため、本研究では アンドロゲン受容体遺伝子欠損マウスを用いたin vivoモデルとゲノムワイド統合的解析によりアンドロゲンと骨格筋の関係を詳細に解明する。

Outline of Final Research Achievements

The anabolic effects of androgen on skeletal muscles are thought to be mediated by androgen receptor (AR). Although multiple studies concerning the effects of AR in males have been performed, the molecular mechanisms of AR in skeletal muscles remain unclear. Here we first confirmed that satellite cells from mouse hindlimb muscles express AR. We then generated satellite cell-specific AR knockout mice using Pax7CreERT2 and ARL2/Y mice to test whether AR in satellite cells is necessary for muscle regeneration. We found that muscle regeneration was compromised in both Pax7CreERT2(Fan)/+ control mice and Pax7CreERT2(Fan)/+;ARL2/Y mice compared to ARL2/Y mice. However, Pax7CreERT2(Gaka)/+;ARL2/Y mice showed no significant differences between control and mutant muscle regeneration. These findings indicate that AR in satellite cells is not essential for muscle regeneration.

Academic Significance and Societal Importance of the Research Achievements

本研究ではアンドロゲン受容体遺伝子欠損マウスを用いたin vivoモデルによりアンドロゲンと骨格筋再生ならびに骨格筋幹細胞の関係を詳細に解明した。この作用機序を解明することは、アンドロゲン補充治療の副作用を解明し、サルコペニアの予防・治療の発展と、ひいては超高齢社会における健康寿命問題を克服する一つの起点となる。

Report

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

    (12 results)

All 2021 2020 2019 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (6 results) (of which Int'l Joint Research: 1 results) Remarks (2 results)

  • [Journal Article] Myofiber androgen receptor increases muscle strength mediated by a skeletal muscle splicing variant of Mylk42021

    • Author(s)
      Iori Sakakibara, Yuta Yanagihara, Koichi Himori, Takashi Yamada, Hiroshi Sakai, Yuichiro Sawada, Hirotaka Takahashi, Noritaka Saeki, Hiroyuki Hirakawa, Atsushi Yokoyama, So-Ichiro Fukada, Tatsuya Sawasaki, Yuuki Imai
    • Journal Title

      iScience

      Volume: 24 Issue: 4 Pages: 102303-102303

    • DOI

      10.1016/j.isci.2021.102303

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] DNA maintenance methylation enzyme Dnmt1 in satellite cells is essential for muscle regeneration2021

    • Author(s)
      Iio Hiroyuki、Kikugawa Tadahiko、Sawada Yuichiro、Sakai Hiroshi、Yoshida Shuhei、Yanagihara Yuta、Ikedo Aoi、Saeki Noritaka、Fukada So-ichiro、Saika Takashi、Imai Yuuki
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 534 Pages: 79-85

    • DOI

      10.1016/j.bbrc.2020.11.116

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Polyamine pathway is associated with muscle anabolic effects by androgen receptor ligand2020

    • Author(s)
      Kanou Masanobu、Nakamura Katsuyuki、Horie Kyohei、Sakai Hiroshi、Yanagihara Yuta、Sakakibara Iori、Yamana Kei、Imai Yuuki
    • Journal Title

      JCSM Rapid Communications

      Volume: 4 Issue: 1 Pages: 57-74

    • DOI

      10.1002/rco2.28

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Androgen receptor in satellite cells is not essential for muscle regenerations2020

    • Author(s)
      Sakai H, Sato T, Kanagawa M, Fukada S-i, Imai Y
    • Journal Title

      Experimental Results

      Volume: e Pages: 1-9

    • DOI

      10.1017/exp.2020.14

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Androgen receptor in satellite cells is not essential for muscle regenerations2020

    • Author(s)
      Hiroshi Sakai, Takahiko Sato, Motoi Kanagawa, So-ichiro Fukada, Yuuki Imai
    • Organizer
      第6回日本筋学会学術集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Muscle regeneration in a muscle stem cell-specific androgen receptor-knockout mice2019

    • Author(s)
      酒井 大史、今井 祐記
    • Organizer
      日本筋学会第5回学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] Muscle regeneration in a muscle stem cell-specific androgen receptor-knockout mice2019

    • Author(s)
      Hiroshi Sakai, Yuuki Imai
    • Organizer
      Protein Island Matsuyama 2019 (PIM2019) International Symposium
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Muscle regeneration in a muscle stem cell-specific androgen receptor-knockout mice2019

    • Author(s)
      酒井 大史
    • Organizer
      新学術領域研究「性スペクトラム 連続する表現型としての雌雄」第3回領域会議
    • Related Report
      2019 Research-status Report
  • [Presentation] Muscle regeneration in a muscle stem cell-specific androgen receptor-knockout mice2019

    • Author(s)
      Hiroshi Sakai, Takahiko Sato, Yuuki Imai
    • Organizer
      第7回若手による骨格筋細胞研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] Muscle regeneration in a muscle stem cell-specific androgen receptor-knockout mice2019

    • Author(s)
      Hiroshi Sakai
    • Organizer
      The 42nd Annual Meeting of the Molecular Biology Society of Japan
    • Related Report
      2019 Research-status Report
  • [Remarks] 性ホルモンと筋肉の関係解明を目指した研究

    • URL

      https://www.ehime-u.ac.jp/data_study/data_study-147498/

    • Related Report
      2020 Annual Research Report
  • [Remarks] 第一期 HIRAKU-Global 教員インタビュー

    • URL

      https://www.hiroshima-u.ac.jp/system/files/161017/HIRAKU-Global_Newsletter_Vol.2_FY2020.pdf

    • Related Report
      2020 Annual Research Report

URL: 

Published: 2019-04-18   Modified: 2022-01-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi