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2015 Fiscal Year Research-status Report

疾患iPS研究に基づく網膜色素変性症に対する新規神経保護治療薬の開発に向けた研究

Research Project

Project/Area Number 15K10903
Research InstitutionKeio University

Principal Investigator

小澤 洋子  慶應義塾大学, 医学部, 講師 (90265885)

Project Period (FY) 2015-04-01 – 2018-03-31
Keywords網膜 / 幹細胞 / iPS / 再生 / 神経保護
Outline of Annual Research Achievements

網膜色素変性症は、4000~8000人に1人で発症するとされ、遺伝子異常により生じる網膜視細胞もしくは網膜色素上皮細胞の変性であるが、そのメカニズムには不明の点が多い。現時点では、世界的にも承認された治療薬はなく、遺伝子異常がわかっていたとしても、対処法が無いという状況が続いている。徐々に進行し、国内失明原因の第3位を占める疾患である。早期に診断が付いても進行を抑制する安定した治療法はない。異常遺伝子が明らかになっても、細胞死のメカニズムが不明であるものが多いためである。そこで、申請者らはこれまでに、視物質であるロドプシン異常遺伝子を持つ網膜色素変性症患者の体細胞由来の人工多能性細胞(induced-pluripotent stem cell; iPS細胞)を用いて網膜細胞を誘導・培養し、神経保護治療法薬剤の開発に向けた病態メカニズムの解析(疾患iPS研究) を行い報告した(Yoshida, Ozawa, Okano et al. Mol. Brain 2014)。この中で本疾患におけるストレス応答反応の病態への関与を明らかにし、それを抑制する薬剤の候補を得た。
そこで本研究では、疾患iPS研究の培養において有効性があった薬剤を、網膜色素変性症モデルマウスに投与して、生体内で網膜神経細胞の保護 (細胞死抑制) 効果が得られるかを解析することとした。これにより将来的には、網膜色素変性症のための新規進行抑制治療法の開発につなげることとした。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

予定通り

網膜色素変性症モデルマウスは順調に飼育され、その表現型は組織学的、電気生理学的等の解析により、週齢を追って示されつつあり、予定通りの進捗である

Strategy for Future Research Activity

今後は申請者らの先行研究である、疾患iPS研究により明らかにされた候補薬剤の一つであるラパマイシンの投与量や投与日程を振ることにより、コントロール群との効果の差を示す良い条件を探索する。効果の指標としては視機能を示す網膜電図を主に用い、必要に応じて組織学的解析も行う。また、副作用等についても配慮があり、体重等の情報も集めるようにする。万一、ラパマイシンによる介入で効果が不充分であると考えられる場合には、先行研究により示された他の候補薬剤の使用を検討する。

Causes of Carryover

効率的な執行により残額が生じた。

Expenditure Plan for Carryover Budget

引き続き物品費や、旅費、解析費等に充てていく。

  • Research Products

    (18 results)

All 2016 2015

All Journal Article (12 results) (of which Peer Reviewed: 11 results,  Open Access: 12 results,  Acknowledgement Compliant: 12 results) Presentation (6 results) (of which Int'l Joint Research: 2 results,  Invited: 4 results)

  • [Journal Article] Sneddon’s syndrome with optic disc macroaneurysm and macular edema successfully treated with subtenon steroid injection.2016

    • Author(s)
      Nagai N, Ohta Y, Izumi-Nagai K, Shinoda H, Tsubota K, Ozawa Y
    • Journal Title

      Acta Ophthalmol.

      Volume: 94 Pages: 517-9

    • DOI

      10.1111/aos.12909.

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Distinct responsiveness to intravitreal ranibizumab therapy in polypoidal choroidal vasculopathy with single or multiple polyps.2016

    • Author(s)
      Suzuki M, Nagai N, Shinoda H, Uchida A, Kurihara T, Tomita Y, Kamoshita M, Iyama C, Tsubota K, Ozawa Y
    • Journal Title

      Am J Ophthalmol.

      Volume: 166 Pages: 52-9.

    • DOI

      10.1016/j.ajo.2016.03.024.

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Angiopoietin-like protein 2 is a multistep regulator of inflammatory neovascularization in a murine model of age-related macular degeneration.2016

    • Author(s)
      Hirasawa M, Takubo K, Osada H, Miyake S, Toda E, Endo M, Umezawa K, Tsubota K, Oike Y, Ozawa Y
    • Journal Title

      J Biol Chem.

      Volume: 291 Pages: 7373-85.

    • DOI

      10.1074/jbc.M115.710186.

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] The Neuroprotective Effect of Rapamycin as a Modulator of the mTOR-NF-KB Axis during Retinal Inflammation.2016

    • Author(s)
      Okamoto T, Ozawa Y*, Kamoshita M, Osada H, Toda E, Kurihara T, Nagai N, Umezawa K, Tsubota K.
    • Journal Title

      PLOS ONE

      Volume: 11 Pages: -

    • DOI

      10.1371/journal.pone.0146517.

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Functional Visual Acuity in Age-Related Macular Degeneration.2016

    • Author(s)
      Tomita Y, Nagai Y, Suzuki M, Shinoda H, Uchida A, Mochimaru H, Izumi-Nagai K, Sasaki M, Tsubota K, Ozawa Y
    • Journal Title

      Optometry and Vision Science

      Volume: 93 Pages: 70-76

    • DOI

      10.1097/OPX.0000000000000755

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Glaucomatous visual field defect severity and the prevalence of motor vehicle collisions in Japanese: a hospital/clinic-based cross-sectional study.2015

    • Author(s)
      Ono T, Yuki K, Asaoka R, Kouyama K, Abe T, Tanabe S, Fukagawa K, Uchino M, Shimoyama M, Ozawa Y, Ozeki N, Shiba D, Tsubota K.
    • Journal Title

      Journal of Ophthalmology

      Volume: 8 Pages: -

    • DOI

      10.1155/2015/497067.

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Association of Macular Pigment Optical Density (MPOD) with serum concentration of oxidized low-density lipoprotein (oxidized LDL) in Healthy Adults.2015

    • Author(s)
      11.Nagai N, Izumi-Nagai K, Suzuki M, Shinoda H,Koto T, Uchida A, Mochimaru H, Tomita Y, Miyake S, Kobayashi S, Sasaki M, Tsubota K, Ozawa Y
    • Journal Title

      Retina.

      Volume: 35 Pages: 820-6

    • DOI

      10.1097/IAE.0000000000000382.

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Bilberry extract supplementation for preventing eye fatigue in video display terminal workers.2015

    • Author(s)
      Ozawa Y, Kawashima M, Inoue S, Inagaki E, Suzuki A, Ooe E, Kobayashi S, Tsubota K.
    • Journal Title

      The journal of nutrition, health & aging

      Volume: 19 Pages: 548-54

    • DOI

      10.1007/s12603-014-0573-6.

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Blue light-induced inflammatory marker expression in the retinal pigment epithelium-choroid of mice and the protective effect of a yellow intraocular lens material in vivo.2015

    • Author(s)
      Narimatsu T, Negishi K, Miyake S, Hirasawa M, Kurihara T, Tsubota K, Ozawa Y
    • Journal Title

      Experimental Eye Research.

      Volume: 132 Pages: 48-51

    • DOI

      10.1016/j.exer.2015.01.003.

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Predisposing factors for IOL dislocation treated by pars plana vitrectomy; Involvement of atopic dermatitis.2015

    • Author(s)
      8.Yotsukura-Tsutsui E, Koto T, Tsubota K, Ozawa Y.
    • Journal Title

      Journal of Cataract and Refractive Surgery.

      Volume: 41 Pages: 892-4

    • DOI

      10.1016/j.jcrs.2014.12.047.

    • Open Access / Acknowledgement Compliant
  • [Journal Article] Wide-Angle Viewing System versus Conventional Indirect Ophthalmoscopy for Scleral Buckling.2015

    • Author(s)
      Tomita Y, Kurihara T, Uchida A, Nagai N, Shinoda H, Tsubota K, Ozawa Y.
    • Journal Title

      Scientific Reports.

      Volume: 5 Pages: -

    • DOI

      10.1038/srep13256.

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Vision loss by central retinal vein occlusion after Kaatsu training: a case report. Medicine (Baltimore).2015

    • Author(s)
      Ozawa Y, Koto T, Shinoda H, Tsubota K.
    • Journal Title

      Medicine (Baltimore).

      Volume: 94 Pages: 36

    • DOI

      10.1097/MD.0000000000001515.

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] Neurodegeneration in the diabetic retina.2015

    • Author(s)
      Ozawa Y
    • Organizer
      The 2015 IOIS Congress
    • Place of Presentation
      San Francisco, USA
    • Year and Date
      2015-09-25 – 2015-09-27
    • Invited
  • [Presentation] Light-induced inflammation in the underlying mechanism of AMD.2015

    • Author(s)
      Ozawa Y
    • Organizer
      The 2015 IOIS Congress
    • Place of Presentation
      San Francisco, USA
    • Year and Date
      2015-09-25 – 2015-09-27
    • Invited
  • [Presentation] 6. Ozawa Y. The use of induced pluripotent stem cells (iPSCs) to reveal pathogenic gene mutations and explore treatments for retinitis pigmentosa2015

    • Author(s)
      Ozawa Y
    • Organizer
      The 9th APVRS (Asia Pacific Vitreo-retina Socoity)
    • Place of Presentation
      Sydney, Australia
    • Year and Date
      2015-07-31 – 2015-08-02
    • Invited
  • [Presentation] Retinal photo-damage and the underlying mechanisms2015

    • Author(s)
      Ozawa Y
    • Organizer
      The 2nd International Symposium of Blue Light Society
    • Place of Presentation
      New York, USA
    • Year and Date
      2015-06-26 – 2015-06-27
    • Invited
  • [Presentation] Neuroprotective effect of rapamycin in the retina.2015

    • Author(s)
      Okamoto T, Ozawa Y
    • Organizer
      ARVO annual meeting 2015 (The Association for Research in Vision and Ophthalmology)
    • Place of Presentation
      Denver, Colorado, USA
    • Year and Date
      2015-05-03 – 2015-05-07
    • Int'l Joint Research
  • [Presentation] Light-induced retinal degeneration and AMPK.2015

    • Author(s)
      Kawashima H, Ozawa Y
    • Organizer
      ARVO annual meeting 2015 (The Association for Research in Vision and Ophthalmology)
    • Place of Presentation
      Denver, Colorado, USA
    • Year and Date
      2015-05-03 – 2015-05-07
    • Int'l Joint Research

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Published: 2017-01-06  

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