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2021 Fiscal Year Annual Research Report

Formation of a strategic base for production of large animal models of inherited retinal diseases and their treatments

Research Project

Project/Area Number 18H02954
Research InstitutionMie University

Principal Investigator

近藤 峰生  三重大学, 医学系研究科, 教授 (80303642)

Co-Investigator(Kenkyū-buntansha) 杉本 昌彦  三重大学, 医学部附属病院, 講師 (00422874)
生杉 謙吾  三重大学, 医学系研究科, 准教授 (10335135)
松原 央  三重大学, 医学部附属病院, 講師 (20378409)
富田 浩史  岩手大学, 理工学部, 教授 (40302088)
Project Period (FY) 2018-04-01 – 2022-03-31
Keywords夜盲 / 先天停在性夜盲 / 網膜電図 / 遺伝子治療 / 動物モデル / 犬 / ウサギ / 網膜色素変性
Outline of Annual Research Achievements

完全型先天停在性夜盲(cCSNB)を有する自然発症の夜盲犬に対する遺伝子治療を進めた。ペンシルバニア大学のAguirre博士との共同研究によりLRIT2遺伝子に変異が確認されたcCSNB犬の硝子体を切除し、硝子体注射により網膜にベクターが直接到達しやすいように準備した。続いて、研究分担者である岩手大学理工学部の富田浩史教授が作成した正常なLRIT2遺伝子を搭載した変異型アデノ随伴ウイルスベクター(AAV:注入後の細胞標識目的でGFP遺伝子も導入)を硝子体内に注射した。ベクター注射後にcCSNB犬に正常遺伝子が発現しているかどうかを免疫組織学およびPCRで確認し、またcCSNB犬の夜盲症状が改善しているかをERGと暗所行動実験で確認する予定であったが、新型コロナウイルス感染症が長引くことにより研究計画が大幅に遅延した。本実験は犬という大型動物を用いるために、複数の研究者による密な状況での動物実験が必要であったことが遅延の理由である。今後は、まず暗順応後にcCSNB犬からERGを定期的に記録し、杆体ERG応答が回復しているかどうかの確認を行い(電気生理学的実験)、次いで暗所で障害物を用いた迷路における歩行中の衝突回数の計測を行う(行動実験)。その後治療を行ったcCSNBの眼球を摘出し、LRIT2抗体とPCRを用いて実際に治療したcCSNB犬の網膜に正常なLRIT2が発現しているかどうかの確認を行う予定である。
また、実験用大型動物を多数飼育して国内研究所に供給している北山ラベス(株)と共同実験を行い、飼育しているビーグル犬から、眼底検査、ERG検査を行い、遺伝性網膜疾患の候補となる犬がいないかを検索した。その結果、眼底およびERGに異常を有するビーグル犬を検出することができた。

Research Progress Status

令和3年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和3年度が最終年度であるため、記入しない。

  • Research Products

    (16 results)

All 2022 2021

All Journal Article (12 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 12 results,  Open Access: 8 results) Presentation (4 results) (of which Int'l Joint Research: 4 results,  Invited: 2 results)

  • [Journal Article] Visual Field Characteristics in East Asian Patients With Occult Macular Dystrophy (Miyake Disease): EAOMD Report No. 32022

    • Author(s)
      Ahn SJ, Yang L, Tsunoda K, Kondo M, Fujinami-Yokokawa Y, Nakamura N, Iwata T, Kim MS, Mun Y, Park JY, Joo K, Park KH, Miyake Y, Sui R, Fujinami K, Woo SJ; East Asia Inherited Retinal Disease Society Study Group
    • Journal Title

      Invest Ophthalmol Vis Sci

      Volume: 63 Pages: 12

    • DOI

      10.1167/iovs.63.1.12.

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Effects of suspension of anti-vascular endothelial growth factor treatment for neovascular age-related macular degeneration in clinical setting2022

    • Author(s)
      Matsubara H, Matsui Y, Miyata R, Ichio A, Chujo S, Enomoto H, Sugimoto M, Kondo M
    • Journal Title

      Graefes Arch Clin Exp Ophthalmol

      Volume: - Pages: -

    • DOI

      10.1007/s00417-021-05526-0

    • Peer Reviewed
  • [Journal Article] Case of unilateral pellucid marginal corneal degeneration progressing to corneal perforation with keratoconus in contralateral eye2022

    • Author(s)
      Ueji N, Kato K, Yonekawa Y, Takeuchi M, Takashima Y, Hirano K, Kondo M
    • Journal Title

      Am J Ophthalmol Case Rep

      Volume: 25 Pages: 101293

    • DOI

      10.1016/j.ajoc.2022.101293

    • Peer Reviewed / Open Access
  • [Journal Article] Treatment of diabetic macular edema in real-world clinical practice: the effect of aging2022

    • Author(s)
      Kusuhara S, Shimura M, Kitano S... Kondo, et al; Japan Clinical Retina Study (J-CREST) group
    • Journal Title

      J Diabetes Investig

      Volume: - Pages: -

    • DOI

      10.1111/jdi.13801

    • Peer Reviewed / Open Access
  • [Journal Article] Case of cystoid macular edema induced by systemic administration of paclitaxel: evaluations with electroretinograms2021

    • Author(s)
      Kato K, Nagashima R, Sugimoto M, Ikesugi K, Matsubara H, Kondo M
    • Journal Title

      Doc Ophthalmol

      Volume: 143 Pages: 229-235

    • DOI

      10.1007/s10633-021-09835-x

    • Peer Reviewed
  • [Journal Article] Increased expression of Protein S in eyes with diabetic retinopathy and diabetic macular edema.2021

    • Author(s)
      Sugimoto M, Kondo M, Yasuma T, D'Alessandro-Gabazza CN, Toda M, Imai H, Nakamura M, Gabazza EC.
    • Journal Title

      Sci Rep

      Volume: 11 Pages: 10449

    • DOI

      10.1038/s41598-021-89870-5

    • Peer Reviewed / Open Access
  • [Journal Article] Ocular findings in Japanese patients with hydroxychloroquine retinopathy developing within 3 years of treatment.2021

    • Author(s)
      Ozawa H, Ueno S, Ohno-Tanaka A, Sakai T, Hashiguchi M, Shimizu M, Fujinami K, Ahn SJ, Kondo M, Browning DJ, Shinoda K, Yokogawa N
    • Journal Title

      Jpn J Ophthalmol

      Volume: 65 Pages: 472-481

    • DOI

      10.1007/s10384-021-00841-9

    • Peer Reviewed
  • [Journal Article] A rat model for retinitis pigmentosa with rapid retinal degeneration enables drug evaluation in vivo2021

    • Author(s)
      Inoue C, Takeuchi T, Shiota A, Kondo M, Nshizawa Y.
    • Journal Title

      Biol Proced Online

      Volume: 23 Pages: 11

    • DOI

      10.1186/s12575-021-00150-y

    • Peer Reviewed / Open Access
  • [Journal Article] Broad locations of antigenic regions for anti-TRPM1 autoantibodies in paraneoplastic retinopathy with retinal ON bipolar cell dysfunction2021

    • Author(s)
      Gyoten D, Ueno S, Okado S, Chaya T, Yasuda S, Morimoto T, Kondo M, Kimura K, Hayashi T, Leroy BP, Woo SJ, Mukai R, Joo K, Furukawa T.
    • Journal Title

      Exp Eye Res

      Volume: 212 Pages: 108770

    • DOI

      10.1016/j.exer.2021.108770

    • Peer Reviewed
  • [Journal Article] Background Factors Affecting Visual Acuity at Initial Visit in Eyes with Central Retinal Vein Occlusion: Multicenter Study in Japan2021

    • Author(s)
      Kondo M, Noma H, Shimura M, Sugimoto M, Matsui Y, Kato K, Saishin Y, Ohji M, Ishikawa H, Gomi F, Iwata K, Yoshida S, Kusuhara S, Hirai H, Ogata N, Hirano T, Murata T, Tsuboi K, Kamei M, Kinoshita T, Kuwayama S, Hirano Y, Ohta M, Kimura K, Takayama K, Takeuchi M, Takamura Y, Okamoto F, Mitamura Y, Terasaki H, Sakamoto T
    • Journal Title

      J Clin Med

      Volume: 10 Pages: 5619

    • DOI

      10.3390/jcm10235619

    • Peer Reviewed / Open Access
  • [Journal Article] Effectiveness of microperimetry in evaluating anti-vascular endothelial growth factor therapy for diabetic macular edema patients with relatively good vision: A retrospective observational study2021

    • Author(s)
      Sugimoto M, Wakamatsu Y, Miyata R, Kato K, Matsubara H, Kondo M
    • Journal Title

      Medicine (Baltimore)

      Volume: 100 Pages: e28404

    • DOI

      10.1097/MD.0000000000028404

    • Peer Reviewed / Open Access
  • [Journal Article] Trends in the Prevalence and Progression of Diabetic Retinopathy Associated with Hyperglycemic Disorders during Pregnancy in Japan.2021

    • Author(s)
      Sugimoto M, Sampa K, Tsukitome H, Kato K, Matsubara H, Asami S, Sekimoto K, Kitano S, Yoshida S, Takamura Y, Hirano T, Murata T, Shimizu M, Kinoshita T, Kusuhara S, Sawada O, Ohji M, Yoshikawa R, Kimura K, Ishikawa H, Gomi F, Terasaki H, Kondo M, Ikeda T
    • Journal Title

      J Clin Med

      Volume: 11 Pages: 165

    • DOI

      10.3390/jcm11010165

    • Peer Reviewed / Open Access
  • [Presentation] Topics and clinical application of hand-held small ERG device, RETeval2021

    • Author(s)
      Kondo M
    • Organizer
      Korean Society for Clinical Electrophysiology of Vision
    • Int'l Joint Research / Invited
  • [Presentation] Kondo M: How to evaluate ischemia in CRVO?2021

    • Author(s)
      Kondo M
    • Organizer
      Retina World Congress
    • Int'l Joint Research / Invited
  • [Presentation] How basic research can enhance visual diagnosis in the clinical setting2021

    • Author(s)
      Kondo M
    • Organizer
      International Society for Clinical Electrophysiology of Vision
    • Int'l Joint Research
  • [Presentation] Exploration of novel clinical benefits with high resolution OCT and OCT angiography2021

    • Author(s)
      Kondo M
    • Organizer
      The 2nd International Ocular Circulation Society
    • Int'l Joint Research

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Published: 2022-12-28  

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