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Elucidation of the anti-inflammatory mechanism by active sulfur species aimed at the treatment and alleviation of inflammatory eye diseases

Research Project

Project/Area Number 21K09714
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56060:Ophthalmology-related
Research InstitutionTohoku University

Principal Investigator

Tawarayama Hiroshi  東北大学, 医学系研究科, 助教 (20402414)

Co-Investigator(Kenkyū-buntansha) 中澤 徹  東北大学, 医学系研究科, 教授 (30361075)
國方 彦志  東北大学, 医学系研究科, 准教授 (40361092)
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超硫黄 / グルタチオン三硫化物 / 抗炎症 / 加齢性眼疾患 / グルタチオン過硫化物 / 抗酸化
Outline of Research at the Start

酸化ストレス及び炎症は加齢性眼科疾患の一因であり、これら疾患の発症や病態緩和には抗酸化能・抗炎症能の増強が効果的である。これまで我々は、活性イオウ分子種の一つであるグルタチオン三硫化物(GSSSG)が、眼由来細胞株や網膜組織において抗炎症作用を発揮することを世界に先駆けて明らかにした。しかし、その作用機序については十分には解明されていない。本研究では、以前我々が実施した網羅的遺伝子発現解析のデータに基づく遺伝子レベルでの解析、及び既知の阻害剤・活性化剤を用いたタンパクの化学修飾レベルでの解析を実施し、GSSSGによる抗炎症作用機序の解明を図る。

Outline of Final Research Achievements

Oxidative stress and inflammation are contributing factors to age-related ocular diseases, and enhancing antioxidant and anti-inflammatory capacities has been shown to be effective in the onset and management of these diseases. Previously, we demonstrated that one of the active sulfur species, glutathione trisulfide (GSSSG), exhibits anti-inflammatory effects in ocular cell lines and retinal tissues. However, the underlying mechanism of action remains incompletely understood. In this study, we addressed this challenge and identified some of the intracellular signaling pathways responsible for the anti-inflammatory effects of GSSSG. These findings contribute to predicting the safety and potential side effects of GSSSG-based drugs aimed at alleviating ocular diseases in the future.

Academic Significance and Societal Importance of the Research Achievements

本研究課題では、生体内において自然的に存在するGSSSGの抗炎症作用に着目し、その作用機序を明らかにすることを目的とした。以前我々は、GSSSGによるIL6及びMCP1の転写抑制に細胞内シグナル分子であるERK1/2が関与していることを見出した。しかし、IL1bの発現抑制機序については未解明であった。IL1bはそれ自身やIL6といった他の炎症性サイトカインの発現を促し、炎症増悪をもたらす。即ち、サイトカインストームの抑制にはIL1bの無力化が有効であり、本研究によってGSSSGの作用機序が明らかになったことで、その臨床応用に際し、生じうる副反応の予測を容易にした。

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 (5 results) (of which Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Glutathione trisulfide prevents lipopolysaccharide-induced retinal inflammation via inhibition of proinflammatory cytokine production in glial cells2023

    • Author(s)
      Tawarayama Hiroshi、Umeki Kota、Inoue-Yanagimachi Maki、Takahashi Naoki、Hasegawa Hirokazu、Himori Noriko、Tsuda Satoru、Kunikata Hiroshi、Akaike Takaaki、Nakazawa Toru
    • Journal Title

      Scientific Reports

      Volume: 13 Issue: 1 Pages: 11513-11513

    • DOI

      10.1038/s41598-023-38696-4

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Isozyme-specific histone deacetylase 1/2 inhibitor K560 attenuates oxidative stress-induced retinal cell death.2022

    • Author(s)
      Tawarayama H, Hirata Y, Keiko U, Himori N, Uesato S, Nakazawa T.
    • Journal Title

      Neuroscience Letter

      Volume: 793 Pages: 106978-106978

    • DOI

      10.1016/j.neulet.2022.136978

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Development of an anti-oxidative intraocular irrigating solution based on reactive persulfides2022

    • Author(s)
      Kunikata Hiroshi、Tawarayama Hiroshi、Tsuda Satoru、Akaike Takaaki、Nakazawa Toru
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 19243-12316

    • DOI

      10.1038/s41598-022-21677-4

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Changes in glial cells and neurotrophic factors due to rotenone-induced oxidative stress in Nrf2 knockout mice.2022

    • Author(s)
      Inoue-Yanagimachi M, Himori N, Uchida K, Tawarayama H, Sato K, Yamamoto M, Namekata K, Harada T, Nakazawa T.
    • Journal Title

      Experimental Eye Research.

      Volume: 226 Pages: 109314-109314

    • DOI

      10.1016/j.exer.2022.109314

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Glial cells modulate retinal cell survival in rotenone-induced neural degeneration.2021

    • Author(s)
      Tawarayama H, Inoue-Yanagimachi M, Himori N, Nakazawa T.
    • Journal Title

      Sci Rep.

      Volume: 11 Issue: 1 Pages: 11159-11159

    • DOI

      10.1038/s41598-021-90604-w

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 活性イオウ分子種の抗酸化・抗炎症作用に基づく新規眼内灌流液の開発2021

    • Author(s)
      俵山寛司, 鈴木哲章, 津田聡, 國方彦志, 中澤徹
    • Organizer
      第3回Translational Research Conference for Neuroprotection
    • Related Report
      2021 Research-status Report
  • [Patent(Industrial Property Rights)] 眼内抗炎症剤2021

    • Inventor(s)
      中澤徹、赤池孝章、國方彦志、俵山寛司、津田聡
    • Industrial Property Rights Holder
      中澤徹、赤池孝章、國方彦志、俵山寛司、津田聡
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2021-187729
    • Filing Date
      2021
    • Related Report
      2021 Research-status Report

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

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