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Neuroprotective therapy targeting microglia/macrophages in diabetic retinopathy

Research Project

Project/Area Number 21K16897
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 56060:Ophthalmology-related
Research InstitutionKyushu University

Principal Investigator

Yamaguchi Muneo  九州大学, 大学病院, 医員 (50848017)

Project Period (FY) 2021-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2022: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords糖尿病網膜症 / 神経障害 / マクロファージ / 神経保護
Outline of Research at the Start

抗VEGF療法等により、糖尿病網膜症(DR)の本態である血管病変の沈静化は得られるようになった。しかし、しばしば血管病変は沈静化していても視力不良な症例を認める。網膜イメージング機器の解像度が上がったことにより、そのような症例では網膜視細胞の障害が示唆されるようになったが、現在治療法はない。神経障害に炎症細胞の関与を考え、神経保護治療の標的として解析を行う。

Outline of Final Research Achievements

We observed photoreceptor cell death and macrophage/microglia kinetics in mice retina with over expression of VEGF in the eye (VEGF mice).Along with VEGF expression, various inflammatory cytokines, which have been reported to be elevated in patients with diabetic retinopathy, increased. Photoreceptor cell death occurred gradually and the retina thinned. At the peak of photoreceptor cell death, macrophages/microglia increased and morphological changes were observed. The phenotype of macrophages/microglias at the vitreoretinal interface was uniformly M2-like, with findings of local proliferation. The phenotype of macrophages/microglias within the retina was both M1 and M2-like.

Academic Significance and Societal Importance of the Research Achievements

眼内でのVEGF高発現とともに、炎症に関与しているとされているM1マクロファージ/マイクログリアの増加、活性化を認めた。種々の炎症性サイトカインも増加しており、M1マクロファージ/マイクログリアを標的とした新規治療を創製できれば、糖尿病網膜症患者でのアンメット・メディカルニーズである神経障害を抑制する病態特異的な治療法となることが期待される。

Report

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

    (4 results)

All 2022

All Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results,  Open Access: 4 results)

  • [Journal Article] Identifying Hyperreflective Foci in Diabetic Retinopathy via VEGF-Induced Local Self-Renewal of CX3CR1+ Vitreous Resident Macrophages2022

    • Author(s)
      Yamaguchi Muneo、Nakao Shintaro、Wada Iori、Matoba Tetsuya、Arima Mitsuru、Kaizu Yoshihiro、Shirane Mariko、Ishikawa Keijiro、Nakama Takahito、Murakami Yusuke、Mizuochi Masaharu、Shiraishi Wataru、Yamasaki Ryo、Hisatomi Toshio、Ishibashi Tatsuro、Shibuya Masabumi、Stitt Alan W.、Sonoda Koh-Hei
    • Journal Title

      Diabetes

      Volume: 71 Issue: 12 Pages: 2685-2701

    • DOI

      10.2337/db21-0247

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Morphology and fluorescein leakage in diabetic retinal microaneurysms: a study using multiple en face OCT angiography image averaging2022

    • Author(s)
      Fukuda Yosuke、Nakao Shintaro、Kaizu Yoshihiro、Arima Mitsuru、Shimokawa Sakurako、Wada Iori、Yamaguchi Muneo、Takeda Atsunobu、Sonoda Koh-Hei
    • Journal Title

      Graefe's Archive for Clinical and Experimental Ophthalmology

      Volume: 260 Issue: 11 Pages: 3517-3523

    • DOI

      10.1007/s00417-022-05713-7

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Hyperreflective Membrane at the Vitreoretinal Interface in Diabetic Macular Edema: A Finding in Ultra-High-Resolution Optical Coherence Tomography2022

    • Author(s)
      Wada Iori、Nakao Shintaro、Arima Mitsuru、Ishikawa Keijiro、Yamaguchi Muneo、Kaizu Yoshihiro、Sekiryu Haruka、Mori Kenichiro、Kiyohara Kohei、Takeda Atsunobu、Ishibashi Tatsuro、Sadda SriniVas R.、Sonoda Koh-Hei
    • Journal Title

      Translational Vision Science & Technology

      Volume: 11 Issue: 9 Pages: 21-21

    • DOI

      10.1167/tvst.11.9.21

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Longer Interscan Times in OCT Angiography Detect Slower Capillary Flow in Diabetic Retinopathy2022

    • Author(s)
      Yoshihiro Kaizu
    • Journal Title

      Ophthalmology Science

      Volume: 3 Issue: 3 Pages: 100181-100181

    • DOI

      10.1016/j.xops.2022.100181

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access

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Published: 2021-04-28   Modified: 2024-01-30  

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