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Treatment for diabetic retinopathy targeting cyclin-dependent kinase 5

Research Project

Project/Area Number 19K09951
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56060:Ophthalmology-related
Research InstitutionThe University of Tokushima

Principal Investigator

MITAMURA Yoshinori  徳島大学, 大学院医歯薬学研究部(医学域), 教授 (30287536)

Co-Investigator(Kenkyū-buntansha) 仙波 賢太郎  徳島大学, 病院, 助教 (10745748)
江川 麻理子  徳島大学, 大学院医歯薬学研究部(医学域), 講師 (70507657)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords外科 / 細胞・組織 / 生体分子 / 糖尿病 / 臨床
Outline of Research at the Start

眼科手術検体を用いてサイクリン依存性キナーゼ5(Cdk5)活性を検索し、増殖糖尿病網膜症においてCdk5の活性化がないか、ペルオキシソーム増殖因子活性化受容体ガンマ濃度との相関がないかを確認する。さらに、ラットの培養グリア細胞やヒト血管内皮細胞を高濃度のグルコース下で培養することによって、Cdk5の異常な活性化をもたらすかどうかを検索し、Cdk5を標的とした増殖糖尿病網膜症治療の可能性を探求する。

Outline of Final Research Achievements

We reported that PPARγ, which is involved in abnormal angiogenesis associated with tumor growth and choroidal neovascularization, is also involved in the progression of diabetic retinopathy. In addition, it was reported that cyclin-dependent kinase 5 (Cdk5) promotes the diabetogenic action of PPARγ. Therefore, we decided to investigate the expression of Cdk5 using surgical specimens obtained by vitrectomy for proliferative diabetic retinopathy (PDR). Cdk5 protein expression in the vitreous and proliferative membranes collected during vitrectomy was significantly higher in PDR than in controls. Expression of Cdk5 mRNA was also significantly higher in PDR. These results suggested that Cdk5 may be involved in the pathogenesis of diabetic retinopathy and may be a target for the treatment of diabetic retinopathy.

Academic Significance and Societal Importance of the Research Achievements

糖尿病網膜症に対する抗VEGF療法は治療抵抗性を示す症例もあり、VEGFの上流の発症機序は不明な部分も多い。Cdk5はほぼすべての臓器・組織で発現しているが、神経細胞に高いことが知られている。しかし、これまで増殖糖尿病網膜症などの眼内増殖性疾患の眼内でのCdk5活性は不明であった。我々は硝子体手術時に得られた手術検体を用いてCdk5の眼内での発現を検索し対照と比較して有意に発現が亢進していることを示した。このことからCdk5がPPARγとVEGFの発現亢進を介して糖尿病網膜症の病因に関与していることが示唆され、Cdk5が糖尿病網膜症治療の標的となりうることを示したと考えている。

Report

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

    (5 results)

All 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 4 results)

  • [Int'l Joint Research] モンゴル健康科学大学(モンゴル)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Changes in Choroidal Component Ratio and Circulation After Coffee Intake in Healthy Subjects2021

    • Author(s)
      Nagasato Daisuke、Mitamura Yoshinori、Egawa Mariko、Murao Fumiko、Nagasawa Toshihiko、Komori Natsumi、Sonoda Shozo、Sakamoto Taiji、Tabuchi Hitoshi
    • Journal Title

      Investigative Opthalmology & Visual Science

      Volume: 62 Issue: 3 Pages: 27-27

    • DOI

      10.1167/iovs.62.3.27

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Changes in choroidal structure following intravitreal aflibercept therapy for retinal vein occlusion2020

    • Author(s)
      Mitamura Yoshinori、Enkhmaa Tserennadmid、Sano Hiroki、Niki Masanori、Murao Fumiko、Egawa Mariko、Sonoda Shozo、Sakamoto Taiji
    • Journal Title

      British Journal of Ophthalmology

      Volume: - Issue: 5 Pages: 704-710

    • DOI

      10.1136/bjophthalmol-2020-316214

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Systemic and Ocular Determinants of Choroidal Structures on Optical Coherence Tomography of Eyes with Diabetes and Diabetic Retinopathy2019

    • Author(s)
      Kinoshita Takamasa、Imaizumi Hiroko、Shimizu Miho、Mori Junya、Hatanaka Akira、Aoki Shuichiro、Miyamoto Hirotomo、Iwasaki Masanori、Murao Fumiko、Niki Masanori、Sano Hiroki、Sonoda Shozo、Sakamoto Taiji、Mitamura Yoshinori
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1 Pages: 16228-16228

    • DOI

      10.1038/s41598-019-52750-0

    • NAID

      120006872364

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Changes of choroidal structure and circulation after water drinking test in normal eyes2019

    • Author(s)
      Nagasato Daisuke、Mitamura Yoshinori、Egawa Mariko、Kameoka Masahiro、Nagasawa Toshihiko、Tabuchi Hitoshi 、Kinoshita Takamasa、Sonoda Shozo、Sakamoto Taiji
    • Journal Title

      Graefe's Archive for Clinical and Experimental Ophthalmology

      Volume: 257 Issue: 11 Pages: 2391-2399

    • DOI

      10.1007/s00417-019-04427-7

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

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

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