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

G12/13-dependent signaling of bioactive lipid receptors that regulate PPARgamma activity in adipocytes

Research Project

Project/Area Number 19H03411
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 48040:Medical biochemistry-related
Research InstitutionAkita University

Principal Investigator

Ishii Satoshi  秋田大学, 医学系研究科, 教授 (10300815)

Co-Investigator(Kenkyū-buntansha) 安田 大恭  秋田大学, 医学系研究科, 講師 (70594951)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000)
Fiscal Year 2021: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2020: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2019: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Keywordsシグナル伝達 / LPA / リゾフォスファチジン酸 / リゾホスファチジン酸 / Gα12/13 / Gタンパク質共役型受容体 / LPA4
Outline of Research at the Start

白色脂肪組織のリモデリングは脂肪細胞の分化・増殖ならびにその機能が基盤となって進行するが、核内受容体PPARγはこの基盤の維持に必要かつ十分な分子として知られる。申請者は生理活性脂質の一つであるリゾホスファチジン酸が、三量体Gタンパク質のG12とG13に共役するLPA4受容体を介して、脂肪細胞のPPARγの活性(発現と機能)を抑制することを見出した。本研究では、リゾホスファチジン酸-LPA4-G12/13シグナル軸が脂肪細胞のPPARγの活性(発現と機能)を抑制する分子機序を明らかにする。

Outline of Final Research Achievements

Analysis of obese mice has shown that the fourth receptor (LPA4) for lysophosphatidic acid (LPA) functions as an aggravating factor for type 2 diabetes by coupling with G12/13 proteins in adipocytes. Thus, we compared the expression of LPA4 mRNA in human white adipose tissue between lean, diabetic obese, and non-diabetic obese individuals and found no significant differences among the three groups.
Like LPA4, LPA6 is a G12/13-coupled receptor and is expressed in adipocytes. Therefore, we conducted a study on the metabolic function of LPA6 using obese LPA6-KO mice and found no abnormalities in the metabolic parameters examined.

Academic Significance and Societal Importance of the Research Achievements

肥満者の中には、代謝的に健康な肥満(MHO)と呼ばれるサブグループが存在し、これらの肥満者は健康な代謝を維持し、2型糖尿病などの肥満関連疾患の発症リスクの上昇を示さない。LPA4を介したMHOのメカニズムについての理解につながる研究を発展させることにより、新しい2型糖尿病の治療・診断方法の開発に寄与できる可能性がある。また、LPA4と受容体の機能が類似しているLPA6にも注目して今後検討することも有用であると考えられる。

Report

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

    (5 results)

All 2021 2019 Other

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

  • [Journal Article] アレルギー疾患における血小板活性化因子(PAF)2021

    • Author(s)
      石井 聡
    • Journal Title

      皮膚アレルギーフロンティア

      Volume: 19 Pages: 81-85

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Lysophosphatidic acid?induced YAP/TAZ activation promotes developmental angiogenesis by repressing Notch ligand Dll42019

    • Author(s)
      Yasuda Daisuke、Kobayashi Daiki、Akahoshi Noriyuki、Ohto-Nakanishi Takayo、Yoshioka Kazuaki、Takuwa Yoh、Mizuno Seiya、Takahashi Satoru、Ishii Satoshi
    • Journal Title

      Journal of Clinical Investigation

      Volume: 129 Issue: 10 Pages: 4332-4349

    • DOI

      10.1172/jci121955

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] G12/13-coupled Non-Edge LPA receptors mediate developmental angiogenesis2019

    • Author(s)
      Satoshi Ishii
    • Organizer
      FASEB Summer Research Conferences; Lysophospholipid and Related Mediators: From Bench to Clinic
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 転写共役因子YAP/TAZを介したリゾホスファチジン酸の血管新生制御機構2019

    • Author(s)
      安田大恭、小林大礎、吉岡和晃、 多久和陽、石井 聡
    • Organizer
      第92回日本生化学会大会
    • Related Report
      2019 Annual Research Report
  • [Remarks] プレス発表資料

    • URL

      https://research-er.jp/articles/view/81280

    • Related Report
      2019 Annual Research Report

URL: 

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

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi