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Establishment of a novel experimental model of retinal pericyte deletion for accelerating the development of therapeutic agents for diabetic retinopathy

Research Project

Project/Area Number 21K06604
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

Nakahara Tsutomu  北里大学, 薬学部, 教授 (10296519)

Co-Investigator(Kenkyū-buntansha) 森田 茜  北里大学, 薬学部, 助教 (00828072)
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: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords網膜血管 / 網膜症 / 内皮細胞 / ペリサイト / 血管異常 / VEGF
Outline of Research at the Start

糖尿病は様々な合併症を伴うが、中でも網膜症は失明の危険性が極めて高く、Quality of life (QOL) を著しく低下させる疾患として、その病態の解明と予防法・治療法の確立が待ち望まれている。本研究では、ヒトの糖尿病網膜症と類似した網膜血管障害を短期間で発症する網膜血管ペリサイト脱落モデルを確立し、糖尿病網膜症の病態解明及び創薬研究を飛躍的に効率化することを目的として検討を行う。

Outline of Final Research Achievements

Imatinib, a drug for the treatment of chronic myelogenous leukemia, has inhibitory activity on PDGF receptor β. The present study showed that in neonatal rats treated with imatinib, degeneration of retinal capillary pericytes occurred rapidly, and neovascular tufts formed at the site within a week. VEGF receptor 2 was expressed in neovascular tufts and surrounding neovascular vessels and neurons, and VEGF was expressed in retinal ganglion cells. Inhibition of VEGF receptors regressed the neovascular tufts. Thus, VEGF signaling pathway plays an important role in the formation of neovascular tufts following imatinib-induced deletion of retinal capillary pericytes, showing similarities with the vascular abnormalities that occur in human diabetic retinopathy.

Academic Significance and Societal Importance of the Research Achievements

糖尿病網膜症は失明の危険性が極めて高く、Quality of lifeを著しく低下させる疾患として、その病態の解明と予防法・治療法の確立が待ち望まれている。一方で基礎研究に汎用されるマウス・ラットでは、糖尿病を発症させて長期間飼育しても、網膜において血管内皮細胞及びペリサイトの脱落などのヒトの糖尿病網膜症と類似した網膜血管病変が生じにくいという問題点がある。薬物を使用する簡便な方法によりヒトの糖尿病時に生じる網膜血管病変を再現することができれば糖尿病網膜症の病態解明とそれに対する予防/治療薬スクリーニングの飛躍的な効率化に繋がり得る。

Report

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

    (6 results)

All 2024 2023 2021

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (3 results)

  • [Journal Article] Role of mammalian target of rapamycin in the formation and progression of retinopathy of prematurity-like vascular abnormalities in neonatal rats2024

    • Author(s)
      Nakano Ayuki、Morita Akane、Arima Shiho、Nagamitsu Tohru、Nakahara Tsutomu
    • Journal Title

      Microvascular Research

      Volume: 152 Pages: 104626-104626

    • DOI

      10.1016/j.mvr.2023.104626

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The Anti-Diabetic Drug Metformin Suppresses Pathological Retinal Angiogenesis via Blocking the mTORC1 Signaling Pathway in Mice (Metformin Suppresses Pathological Angiogenesis)2024

    • Author(s)
      Yagasaki Rina、Morita Akane、Mori Asami、Sakamoto Kenji、Nakahara Tsutomu
    • Journal Title

      Current Eye Research

      Volume: 49 Issue: 5 Pages: 505

    • DOI

      10.1080/02713683.2024.2302865

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The process of methylglyoxal-induced retinal capillary endothelial cell degeneration in rats2023

    • Author(s)
      Erika Kamiya, Akane Morita, Asami Mori, Kenji Sakamoto, Tsutomu Nakahara
    • Journal Title

      Microvascular Research

      Volume: 146 Pages: 104455-104455

    • DOI

      10.1016/j.mvr.2022.104455

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] 新生仔ラットにおける未熟児網膜症様血管異常におけるmTORの役割2023

    • Author(s)
      森田 茜、中野歩希、柏原俊英、中原 努
    • Organizer
      第97回日本薬理学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] マウスにおける metformin の病的網膜血管新生に対する抑制効果2023

    • Author(s)
      森田 茜、矢ヶ崎莉菜、森 麻美、坂本謙司、柏原俊英、中原 努
    • Organizer
      第148回日本薬理学会関東部会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 薬物を用いた網膜血管異常モデルの作製と応用2021

    • Author(s)
      中原 努
    • Organizer
      第41回日本眼薬理学会
    • Related Report
      2021 Research-status Report

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

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