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

fundamental study for indirect regulattions of skeletal muscle mass by androgen-like action outside of skeletal muscle fibers

Research Project

Project/Area Number 21K09373
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56030:Urology-related
Research InstitutionEhime University

Principal Investigator

Saika Takashi  愛媛大学, 医学系研究科, 教授 (10314676)

Co-Investigator(Kenkyū-buntansha) 酒井 大史  愛媛大学, プロテオサイエンスセンター, 助教 (00820804)
今井 祐記  愛媛大学, プロテオサイエンスセンター, 教授 (10423873)
菊川 忠彦  愛媛大学, 医学部附属病院, 准教授 (70444734)
三浦 徳宣  愛媛大学, 医学部附属病院, 講師 (80554427)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsandrogen / androgen receptor / 上皮成長因子受容体 / 骨格筋 / Akt / C2C12 / アンドロゲン / サルコペニア / アンドロゲン受容体
Outline of Research at the Start

高齢化で健康寿命伸延が社会的課題となっているなか、フレイルへと進行するサルコペニアの原因、メカニズムの解明が課題である。男性におけるアンドロゲンの低下が骨格筋量の低下を来すことでサルコペニアの一因となることから、「いかにして男性ホルモンが骨格筋量を制御しているのか」という学術的「問い」に対し、男性ホルモンによる骨格筋量制御の分子メカニズムを明らかにする。

Outline of Final Research Achievements

Previous studies on skeletal muscle regulation by androgens suggest that skeletal muscle mass may be indirectly regulated by androgen action outside of skeletal muscle fibers. In this study, we identified proteins that affect skeletal muscle mass using mice with varying blood androgen levels, among which epidermal growth factor receptor (EGFR) was positively correlated with blood androgen levels. We found that the administration of EGFR recombinant protein to C2C12, a mouse myoblast cell line, tended to enhance Akt phosphorylation and further promote protein synthesis. Thus, administration of EGFR recombinant protein to female mice increased the gastrocnemius muscle mass. This suggests that androgens indirectly regulate skeletal muscle via EGFR.

Academic Significance and Societal Importance of the Research Achievements

高齢化で健康寿命伸延が社会的課題となっているなか、フレイルへと進行するサルコペニアの原因、メカニズムの解明は喫緊の課題である。男性におけるアンドロゲンの低下が骨格筋量の低下を来すことでサルコペニアの一因となることは、前立腺癌治療におけるアンドロゲン除去療法の副作用として二次性サルコペニアを来すことからも注目される。ところがアンドロゲンが骨格筋量を制御する詳細なメカニズムは未だ不明である。今回我々は、血中アンドロゲン濃度を変化させたマウスを用いることで、骨格筋量へ影響を及ぼすタンパク質を同定した。これは、今後骨格筋の維持に対する新たな治療法の確立に寄与するものである。

Report

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

    (17 results)

All 2024 2023 2022 2021

All Journal Article (10 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 10 results,  Open Access: 8 results) Presentation (7 results)

  • [Journal Article] Cell-specific functions of androgen receptor in skeletal muscles2024

    • Author(s)
      Sakai Hiroshi, Imai Yuuki.
    • Journal Title

      Endocrine Journal

      Volume: -

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Spatial Gene Expression Analysis Reveals Characteristic Gene Expression Patterns of De Novo Neuroendocrine Prostate Cancer Coexisting with Androgen Receptor Pathway Prostate Cancer2023

    • Author(s)
      Watanabe Ryuta、Miura Noriyoshi、Kurata Mie、Kitazawa Riko、Kikugawa Tadahiko、Saika Takashi
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 24 Issue: 10 Pages: 8955-8955

    • DOI

      10.3390/ijms24108955

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Senescent <scp>CD8</scp> <sup>+</sup> T cells acquire <scp>NK</scp> cell‐like innate functions to promote antitumor immunity2023

    • Author(s)
      Kakuda Toshio、Suzuki Junpei、Matsuoka Yuko、Kikugawa Tadahiko、Saika Takashi、Yamashita Masakatsu
    • Journal Title

      Cancer Science

      Volume: x Issue: 7 Pages: 2810-2820

    • DOI

      10.1111/cas.15824

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Centrosome clustering control in osteoclasts through CCR5-mediated signaling2023

    • Author(s)
      Lee Ji-Won、Lee In-Hee、Watanabe Haruhisa、Liu Yunqing、Sawada Kazuaki、Maekawa Masashi、Uehara Shunsuke、Kobayashi Yasuhiro、Imai Yuuki、Kong Sek Won、Iimura Tadahiro
    • Journal Title

      Scientific Reports

      Volume: 13 Issue: 1 Pages: 20813-20813

    • DOI

      10.1038/s41598-023-48140-2

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] LIM1 contributes to the malignant potential of endometrial cancer2023

    • Author(s)
      Kato Hiroaki、Saeki Noritaka、Imai Matome、Onji Hiroshi、Yano Akiko、Yoshida Shuhei、Sakaue Tomohisa、Fujioka Toru、Sugiyama Takashi、Imai Yuuki
    • Journal Title

      Frontiers in Oncology

      Volume: 13

    • DOI

      10.3389/fonc.2023.1082441

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] CD21lo B Cells Could Be a Potential Predictor of Immune-Related Adverse Events in Renal Cell Carcinoma.2022

    • Author(s)
      Nishimura K, Konishi T, Ochi T, Watanabe R, Noda T, Fukumoto T, Miura N, Miyauchi Y, Kikugawa T, Takenaka K, Saika T.
    • Journal Title

      J Pers Med.

      Volume: 12 Issue: 6 Pages: 888-894

    • DOI

      10.3390/jpm12060888

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Uhrf1 governs the proliferation and differentiation of muscle satellite cells.2022

    • Author(s)
      Sakai H, Sawada Y, Tokunaga N, Tanaka K, Nakagawa S, Sakakibara I, Ono Y, Fukada SI, Ohkawa Y, Kikugawa T, Saika T, Imai Y.
    • Journal Title

      iScience.

      Volume: 25 Issue: 3 Pages: 103928-103928

    • DOI

      10.1016/j.isci.2022.103928

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Macrophages are requisite for angiogenesis of type H vessels during bone regeneration in mice2022

    • Author(s)
      Kohara Yukihiro、Kitazawa Riko、Haraguchi Ryuma、Imai Yuuki、Kitazawa Sohei
    • Journal Title

      Bone

      Volume: 154 Pages: 116200-116200

    • DOI

      10.1016/j.bone.2021.116200

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Histone H3K27 demethylase, Utx, regulates osteoblast-to-osteocyte differentiation2022

    • Author(s)
      Xia Yuhan、Ikedo Aoi、Lee Ji-Won、Iimura Tadahiro、Inoue Kazuki、Imai Yuuki
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 590 Pages: 132-138

    • DOI

      10.1016/j.bbrc.2021.12.102

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Estrogen receptor α in mature osteoblasts regulates the late stage of bone regeneration2021

    • Author(s)
      Ikedo Aoi、Imai Yuuki
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 559 Pages: 238-244

    • DOI

      10.1016/j.bbrc.2021.04.112

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] アンドロゲンによる骨格筋量の制御メカニズムの解明2023

    • Author(s)
      大西智也
    • Organizer
      第9回日本筋学会学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Mechanism of indirect regulation of skeletal muscle mass by androgen2023

    • Author(s)
      大西智也
    • Organizer
      第21回松山国際学術シンポジウム、PRiME共同研究発表会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Mechanism of skeletal muscle mass regulation by androgens2023

    • Author(s)
      大西智也
    • Organizer
      第75回西日本泌尿器科学会総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] アンドロゲンによる骨格筋量の制御メカニズムの解明2023

    • Author(s)
      大西智也
    • Organizer
      第32回泌尿器科分子細胞研究会
    • Related Report
      2022 Research-status Report
  • [Presentation] アンドロゲンによる骨格筋外組織からの間接的な骨格筋量の制御メカニズムの解明2022

    • Author(s)
      大西智也
    • Organizer
      第8回日本筋学会学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] アンドロゲンによる間接的な骨格筋量制御メカニズムの解明2022

    • Author(s)
      大西智也
    • Organizer
      第27回日本病態プロテアーゼ学会
    • Related Report
      2022 Research-status Report
  • [Presentation] Mechanism of indirect regulation of skeletal muscle mass by androgene2022

    • Author(s)
      大西智也
    • Organizer
      第20回松山国際学術シンポジウム、PRiME共同研究発表会
    • Related Report
      2022 Research-status Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi