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Establishment of prediction method for development and progression of diabetic retinopathy targeting intraretinal microvascular abnormalities.

Research Project

Project/Area Number 19K18866
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 56060:Ophthalmology-related
Research InstitutionAsahikawa Medical College

Principal Investigator

SHIMOUCHI AKITO  旭川医科大学, 大学病院, 診療助教 (60647692)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2019: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000)
Keywords糖尿病網膜症 / 網膜内細小血管異常 / 光干渉断層血管撮影 / 汎網膜光凝固術 / ドップラーOCT血流計 / 網膜循環
Outline of Research at the Start

本研究では、糖尿病網膜症の重症化の指標となる「網膜内細小血管異常」という重要な所見に着目する。造影剤を用いずに生体の網膜血管構造を観察することができる「光干渉断層血管撮影」、血流量の絶対値と乱流の程度を測定できる「ドップラー光干渉断層血流計」、そして「糖尿病モデル動物」による実験を組み合わせることで、網膜内細小血管異常の病態を解明し、より早期に糖尿病網膜症の進行を予測する新しい方法や早期治療法について検討する。

Outline of Final Research Achievements

This study aimed to establish the basis of a new progression prediction method and early treatment method that enable early intervention of diabetic retinopathy, and investigated the pathophysiology of intraretinal microvascular abnormalities that are indicators of the aggravation of diabetic retinopathy. As a result, it became clear that intraretinal microvascular abnormalities can be divided into five subtypes, and some intraretinal microvascular abnormalities have a remodeling element and some have a new blood vessel element. It was suggested that the type with tuft (tufted new blood vessel buds) may be an indicator of the development of severe diabetic retinopathy.

Academic Significance and Societal Importance of the Research Achievements

本研究では、国際重症度分類において糖尿病網膜症の重症化の指標と定義づけられている網膜内細小血管異常に着目し、治療前後における網膜内細小血管異常の変化を観察したところ、網膜内細小血管異常には5つのサブタイプがあり、その中にはリモデリングの要素を持つものと、新生血管の要素を持つものがあることが分かった。このうち新生血管の要素を持つものが、より重症化の指標となることが示唆され、新たな進行予測因子として用いることができる可能性がある。

Report

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

    (1 results)

All 2020

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results)

  • [Journal Article] A Proposed Classification of Intraretinal Microvascular Abnormalities in Diabetic Retinopathy Following Panretinal Photocoagulation.2020

    • Author(s)
      Akito Shimouchi
    • Journal Title

      Invest Ophthalmol Vis Sci

      Volume: 61 Issue: 3 Pages: 34-34

    • DOI

      10.1167/iovs.61.3.34

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access

URL: 

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

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