• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

The neurosteroid allopregnanolone and its enantiomer protects retinal neurons by effects on autophagy and GABAA receptors in rat glaucoma models

Research Project

Project/Area Number 18K09438
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

Ishikawa Makoto  秋田大学, 医学系研究科, 准教授 (10212854)

Co-Investigator(Kenkyū-buntansha) 吉冨 健志  福岡国際医療福祉大学, 医療学部, 教授 (60191623)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords緑内障 / 眼圧上昇 / 神経ステロイド / アロプログネノロン / GABA受容体 / オートファジー / 神経保護 / 神経節細胞 / 緑内障動物実験モデル
Outline of Final Research Achievements

In our previous study, we revealed that the neurosteroid, allopregnanolone (AlloP), protected retinal ganglion cells via GABA-A receptors. In the present study, we examined the involvement of autophagy in neuroprotection by AlloP, and revealed that AlloP protects retinal ganglion cells via activation of both GABAA receptors and autophagy. We also examine the effects of the enantiomer of AlloP (ent-AlloP). Ent-AlloP offered similar but better neuroprotection via simply autophagy acceleration but not GABA receptor activation. We conclude that ent-AlloP may serve as a prototype of potential therapeutic agents for treatment of glaucoma as an autophagy enhancer without affecting the inhibitory system mediated by GABARs.

Academic Significance and Societal Importance of the Research Achievements

緑内障は本邦の主要な失明原因だが,その発症メカニズムについては未だ不明な点が多い。我々は,「オートファジーを賦活化する神経ステロイドとその誘導体を投与すると,緑内障性視神経傷害を抑制することができる」との仮説を立て,ラット緑内障モデルを用いて検証した。その結果、GABA受容体作動型神経ステロイドであるアロプレグナノロン(AlloP)の誘導体であるent-AlloPは、GABA-A受容体を介さず、専らオートファジー誘導によって神経保護効果を発揮することが明らかになった。この結果から、ent-AlloPはGABA受容体による副作用がなく、緑内障の神経保護治療薬として期待される。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (22 results)

All 2021 2020 2019 2018 Other

All Int'l Joint Research (2 results) Journal Article (8 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 8 results,  Open Access: 8 results) Presentation (11 results) (of which Int'l Joint Research: 4 results) Patent(Industrial Property Rights) (1 results) (of which Overseas: 1 results)

  • [Int'l Joint Research] Washington University(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] ワシントン大学医学部精神科(米国)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Nasal displacement of retinal vessels on the optic disc in glaucoma associated with a nasally angled passage through lamina cribrosa2021

    • Author(s)
      Sawada Yu、Araie Makoto、Shibata Hitomi、Iwase Takeshi
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 4176-4176

    • DOI

      10.1038/s41598-021-83720-0

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The neurosteroid allopregnanolone protects retinal neurons by effects on autophagy and GABRs/GABAA receptors in rat glaucoma models2020

    • Author(s)
      Ishikawa Makoto、Takaseki Sanae、Yoshitomi Takeshi、Covey Douglas F.、Zorumski Charles F.、Izumi Yukitoshi
    • Journal Title

      Autophagy

      Volume: 17 Issue: 3 Pages: 743-760

    • DOI

      10.1080/15548627.2020.1731270

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Clinical Assessment of Scleral Canal Area in Glaucoma Using Spectral Domain Optical Coherence Tomography.2020

    • Author(s)
      Sawada Y, Araie M, Shibata H, Murata K, Ishikawa M, Yoshitomi T, Iwase T.
    • Journal Title

      Am J Ophthalmol.

      Volume: Apr 9 Pages: 1-26

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The neurosteroid allopregnanolone protects retinal neurons by effects on autophagy and GABRs/GABAA receptors in rat glaucoma models.2020

    • Author(s)
      Ishikawa M, Takaseki S, Yoshitomi T, Covey DF, Zorumski CF, Izumi Y.
    • Journal Title

      Autophagy

      Volume: Feb 27 Pages: 1-18

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Neurosteroids and oxysterols as potential therapeutic agents for glaucoma and Alzheimer's disease.2018

    • Author(s)
      Ishikawa M, Yoshitomi T, Covey DF, Zorumski CF, Izumi Y.
    • Journal Title

      Neuropsychiatry (London).

      Volume: 8 Issue: 01 Pages: 344-359

    • DOI

      10.4172/neuropsychiatry.1000356

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Additive neuroprotective effects of 24(S)-hydroxycholesterol and allopregnanolone in an ex vivo rat glaucoma model.2018

    • Author(s)
      Ishikawa M, Yoshitomi T, Covey DF, Zorumski CF, Izumi Y.
    • Journal Title

      Sci Rep

      Volume: 8 Issue: 1 Pages: 12851-12851

    • DOI

      10.1038/s41598-018-31239-2

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Optic Disc Margin Anatomic Features in Myopic Eyes with Glaucoma with Spectral-Domain OCT.2018

    • Author(s)
      Sawada Y, Araie M, Shibata H, Ishikawa M, Iwata T, Yoshitomi T.
    • Journal Title

      Ophthalmology

      Volume: 125 Issue: 12 Pages: 1886-1897

    • DOI

      10.1016/j.ophtha.2018.07.004

    • NAID

      40022067115

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Focal Lamina Cribrosa Defect in Myopic Eyes With Nonprogressive Glaucomatous Visual Field Defect2018

    • Author(s)
      Sawada Yu、Araie Makoto、Kasuga Hitomi、Ishikawa Makoto、Iwata Toyoto、Murata Katsuyuki、Yoshitomi Takeshi
    • Journal Title

      American Journal of Ophthalmology

      Volume: 190 Pages: 34-49

    • DOI

      10.1016/j.ajo.2018.03.018

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 緑内障実験モデルにおける神経ステロイドのオートファジー誘導と神経保護2020

    • Author(s)
      石川 誠、柴田 直哉、渡辺 裕士、高関 早苗、岩瀬 剛、吉冨 健志、和泉 幸俊
    • Organizer
      日本眼科学会総会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Protective effects of tamoxifen against pressure-induced injury in a rat ex vivo glaucoma model2019

    • Author(s)
      Makoto Ishikawa, Takeshi Yoshitomi, Charles F. Zorumski, Yukitoshi Izumi
    • Organizer
      8th WORLD GLAUCOMA CONGRESS
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Surgical repair of severe traumatic cyclodialysis by a circum- ferentially inserted 5-0 proline thread along the ciliary sulcus2019

    • Author(s)
      Shohei Ito, Makoto Ishikawa, Yu Sawada, Takeshi Yoshitomi
    • Organizer
      8th WORLD GLAUCOMA CONGRESS
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Protective effects of tamoxifen against rat glaucoma model2019

    • Author(s)
      石川誠、柴田直弥、吉冨健志、Zorumski Charles、和泉幸俊
    • Organizer
      第123回 日本眼科学会総会
    • Related Report
      2019 Research-status Report
  • [Presentation] Surgical repair of severe traumatic cyclodialysis by a circum- ferentially inserted 5-0 proline thread along the ciliary sulcus2019

    • Author(s)
      Shohei Ito, Makoto Ishikawa, Yu Sawada, Takeshi Yoshitomi
    • Organizer
      World Glaucoma Congress 2019
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Protective effects of tamoxifen against pressure-induced injury in a rat ex vivo glaucoma model2019

    • Author(s)
      Makoto Ishikawa, Takeshi Yoshitomi, Charles F. Zorumski, Yukitoshi Izumi
    • Organizer
      World Glaucoma Congress 2019
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] ex vivo緑内障モデルにおける神経ステロイドのオートファジー活性効果と神経保護2018

    • Author(s)
      石川 誠、柴田 直哉、吉冨 健志(秋田大) Douglas F. Covey、Charles F. Zorumski、和泉 幸俊(ワシントン大)
    • Organizer
      日本眼科学会総会
    • Related Report
      2018 Research-status Report
  • [Presentation] ex vivo緑内障モデルにおける神経ステロイドの相加的神経保護効果の機序2018

    • Author(s)
      石川 誠、吉冨 健志(秋田大) Covey DF、Zorumski CF、和泉 幸俊(ワシントン大)
    • Organizer
      日本緑内障学会
    • Related Report
      2018 Research-status Report
  • [Presentation] 神経ステロイドの光学異性体特異的な神経保護効果のメカニズム2018

    • Author(s)
      柴田 直弥、石川 誠、吉冨 健志(秋田大) 和泉 幸俊(ワシントン大)
    • Organizer
      日本緑内障学会
    • Related Report
      2018 Research-status Report
  • [Presentation] ex vivo緑内障モデルにおける神経ステロイドの神経保護効果のメカニズム2018

    • Author(s)
      1)石川 誠、柴田 直哉、吉冨 健志(秋田大眼科) 2)Douglas F. Covey、Charles F. Zorumski、和泉 幸俊(ワシントン大)
    • Organizer
      日本眼薬理学会
    • Related Report
      2018 Research-status Report
  • [Presentation] 視神経低形成を 認めた PAX2 PAX2 遺伝子変異を 遺伝子変異を 有した 有した 腎コロボーマ症候群の 1例2018

    • Author(s)
      松井孝子、安田節子、坂本貴子、石川誠、吉冨健志
    • Organizer
      日本臨床眼科学会
    • Related Report
      2018 Research-status Report
  • [Patent(Industrial Property Rights)] The Enantiomer of Allopregnanolone for the Prevention and Treatment of Retinal Degeneration via Autophagy2019

    • Inventor(s)
      石川誠, Douglas F. Covey他
    • Industrial Property Rights Holder
      石川誠, Douglas F. Covey他
    • Industrial Property Rights Type
      特許
    • Filing Date
      2019
    • Related Report
      2018 Research-status Report
    • Overseas

URL: 

Published: 2018-04-23   Modified: 2022-01-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi