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anti-atherosclerotic effects of erythropoietin

Research Project

Project/Area Number 21K06606
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 47040:Pharmacology-related
Research InstitutionKyoto Pharmaceutical University

Principal Investigator

Toba Hiroe  京都薬科大学, 薬学部, 助教 (90351270)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywordsインスリン抵抗性 / エリスロポエチン / 動脈硬化 / ドラッグ・リポジショニング
Outline of Research at the Start

インスリンシグナル経路の中核はPI3K-Akt経路であることから「エリスロポエチンが肝臓、骨格筋だけでなく、血管内、腎臓内のPI3K-Akt経路を活性化することで、各々のインスリンシグナル異常を改善できるか」、エリスロポエチンについて「貧血治療薬からメタボリックシンドローム患者に対する動脈硬化抑制薬としてのドラッグ・リポジショニングが可能か否か」について、インスリン抵抗性モデルラットにエリスロポエチンを投与し、その効果を生理学、薬理学、生化学的な検討から明らかにしていく。

Outline of Final Research Achievements

This study investigated whether erythropoietin would inhibit glucose tolerance and renal and vascular injury. Rats were treated with 12% sucrose in drinking water for 10 weeks to induce insulin resistance. Erythropoietin (75U/kg) was treated for the last 4 weeks. Oral glucose tolerance test and the value of HOMA-IR showed that erythropoietin improved glucose tolerance. In the liver, inflammatory cytokine TNF-alpha was decreased in erythropoietin-treated rats. Erythropoietin tended to reduce fibrotic collagen deposition in renal tubulointerstitial area and macrophage infiltration in aortic adventitia. In conclusion, erythropoietin improved glucose tolerance and might protect renal and vascular injury in the settings of insulin resistance.

Academic Significance and Societal Importance of the Research Achievements

学術的意義は、エリスロポエチンが間接的(肝臓への作用による耐糖能異常改善)かつ直接的(腎臓や血管への作用)な動脈硬化抑制薬となることを証明した点である。これは、貧血治療薬からメタボリックシンドローム患者に対する動脈硬化抑制薬にドラッグ・リポジショニングしうることを示す。
高血圧、糖尿病、脂質異常症が合併しやすいメタボリックシンドローム患者では各疾患の厳格な管理が必要なため、高用量・多種の治療薬服用が必須である。故に、社会的意義は1剤で耐糖能異常と動脈硬化の両面からアプローチできる治療薬を提示する点である。また、ドラッグ・リポジショニングに発展できれば迅速に健康・平均寿命を延長できる点である。

Report

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

    (7 results)

All 2023 2022 2021

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (4 results)

  • [Journal Article] Angelica acutiloba Exerts Antihypertensive Effect and Improves Insulin Resistance in Spontaneously Hypertensive Rats Fed with a High-Fat Diet2022

    • Author(s)
      Watanabe Yusuke、Nessa Naseratun、Toba Hiroe、Kobara Miyuki、Nakata Tetsuo
    • Journal Title

      Pharmacology

      Volume: 107 Issue: 3-4 Pages: 188-196

    • DOI

      10.1159/000520982

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Secreted protein acidic and rich in cysteine (SPARC) and a disintegrin and metalloproteinase with thrombospondin type 1 motif (ADAMTS1) increments by the renin-angiotensin system induce renal fibrosis in deoxycorticosterone acetate-salt hypertensive rats2022

    • Author(s)
      Toba Hiroe、Ikemoto Mitsushi J.、Kobara Miyuki、Nakata Tetsuo
    • Journal Title

      European Journal of Pharmacology

      Volume: 914 Pages: 174681-174681

    • DOI

      10.1016/j.ejphar.2021.174681

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Sphingolipids and Kidney Disease: Possible Role of Preeclampsia and Intrauterine Growth Restriction (IUGR)2021

    • Author(s)
      Yokota Rodrigo、Bhunu Benjamin、Toba Hiroe、Intapad Suttira
    • Journal Title

      Kidney360

      Volume: 2 Issue: 3 Pages: 534-541

    • DOI

      10.34067/kid.0006322020

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Low Dose of Erythropoietin Attenuates Insulin Resistance, Renal fibrosis, and Vascular Inflammation in Sucrose-treated Rats2023

    • Author(s)
      Hiroe Toba, Miyuki Kobara, Tetsuo Nakata
    • Organizer
      第87回日本循環器学会学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] インスリン抵抗性モデルラットの耐糖能異常と臓器障害に対するエリスロポエチンの効果の検討2023

    • Author(s)
      瀧澤恭平、鳥羽裕恵、小原幸、中田徹男
    • Organizer
      日本薬学会 第143回年会
    • Related Report
      2022 Research-status Report
  • [Presentation] Role of secreted protein acidic and rich in cysteine (SPARC) in vascular endothelial cell dysfunction and inflammation2022

    • Author(s)
      Hiroe Toba, Miyuki Kobara, Tetsuo Nakata
    • Organizer
      第 95 回日本薬理学会年会
    • Related Report
      2021 Research-status Report
  • [Presentation] SPARC and ADAMTS1 are induced as anti-inflammatory factors at the early stage of vascular endothelial injury in DOCA-salt hypertensive rats2022

    • Author(s)
      Hiroe Toba, Miyuki Kobara, Tetsuo Nakata
    • Organizer
      第86回日本循環器学会学術集会
    • Related Report
      2021 Research-status Report

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

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