Kurihara, Toshihide

写真a

Affiliation

School of Medicine, Department of Ophthalmology (Shinanomachi)

Position

Associate Professor

Profile 【 Display / hide

  • Toshihide Kurihara is an Associate Professor of Ophthalmology at Keio University, Tokyo, Japan. He has also been appointed as an Adjunct Assistant Professor at the Scripps Research Institute (TSRI) in La Jolla, CA, USA. He received his M.D. degree from the Faculty of Medicine, University of Tsukuba, Ibaraki, Japan, in 2001. He completed his ophthalmology residency at Keio University Hospital in 2005, and obtained his Ph.D. degree under the supervision of Professor Kazuo Tsubota from Keio University Graduate School of Medicine in 2009. Dr. Kurihara did his postdoctoral training under the mentorship of Professor Martin Friedlander at TSRI. His research interest is hypoxia responses in development, physiology, and pathophysiology of the retina. Editorial Board Member: BioMed Research International, Journal of Ophthalmology, and Case Reports in Ophthalmological Medicine

Career 【 Display / hide

  • 2001.04
    -
    2003.03

    Keio University Hospital, Department of Ophthalmology, Resident

  • 2002.07
    -
    2003.06

    National Kasumigaura Hospital, Department of Ophthalmology, Resident

  • 2003.04
    -
    2004.03

    Keio University Hospital, Department of Ophthalmology, Clinical Fellow

  • 2004.01
    -
    2005.03

    Tokyo Saiseikai Central Hospital, Ophthalmology, Clinical Fellow

  • 2005.04
    -
    2009.03

    Keio University Graduate School of Medicine, Doctoral Course

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Academic Background 【 Display / hide

  • 1995.04
    -
    2001.03

    University of Tsukuba, School of Medicine

    University, Graduated

  • 2005.04
    -
    2009.03

    Keio University, Graduate School of Medicine

    Graduate School, Completed

Academic Degrees 【 Display / hide

  • PhD in Medicine, Keio University, Coursework, 2009.03

    Angiotensin 2 type 1 receptor signaling contributes to synaptophysin degradation and neuronal dysfunction in the diabetic retina

 

Research Areas 【 Display / hide

  • Life Science / Ophthalmology (Ophthalmology)

 

Papers 【 Display / hide

  • Violet Light Is Abundant Outdoors but Deficient Indoors in Modern Lifestyle in Tokyo

    Kondo S*, Jiang X*, Torii H, Mori K, Negishi K, Kurihara T†, Tsubota K†

    Int J Enviro Res Public Health. (MDPI AG)  22 ( 3 ) 444 - 444 2025.03

    Corresponding author, Accepted,  ISSN  16617827

     View Summary

    This study examines the role of violet light (VL) in preventing myopia progression, addressing a critical need in urban environments where VL exposure is limited. Recent research suggests that VL, within the 360–400 nm wavelength range, may reduce myopia risk. To investigate, we conducted spectroscopic measurements in various settings across Tokyo, quantifying VL irradiance in natural sunlight. The results showed high VL levels outdoors, averaging 583 μW/cm2 on sunny days and 271 μW/cm2 on cloudy days, leading to a weighted annual average of approximately 310 μW/cm2. In contrast, indoor environments lacked VL due to UV-blocking materials in windows, glasses, and lighting. This deficiency may contribute to the rising incidence of myopia, particularly in urban areas with reduced outdoor exposure. Our findings highlight the need for innovative solutions to mitigate VL deficiency indoors, such as optimizing architectural designs and artificial lighting to better incorporate VL. This study provides foundational insights for future interventions aimed at reducing myopia risk through improved indoor light environments.

  • 第128回 日本眼科学会総会 評議員会指名講演II 視覚とニューロサイエンス 光生物学を基盤とした眼疾患病態生理の理解と治療開発

    栗原俊英

    日眼会誌 129 ( 3 ) 354 - 378 2025.03

    Lead author, Last author, Corresponding author, Accepted

  • Axial Length Shortened in Approximately 20% of Patients Wearing Extended Depth-of-Focus Contact Lenses

    Hazra D*, Yotsukura E*, Oyama S*, Shigeno Y, Mori K, Takeuchi R, Nakajima Y, Hanyuda A, Ogawa M, Kurihara T, Torii H†, Negishi K†

    J Clin Med. 14 ( 5 ) 1750 2025.03

    Accepted

     View Summary

    Background/Objectives: Preceding studies have reported the efficacy of multifocal contact lenses (MFCLs) in slowing myopia progression. Recently, a novel type of MFCL, i.e., extended depth-of-focus (EDOF) contact lens (CL), was designed. Here, we retrospectively investigated myopia progression associated with EDOF CL wear. Methods: Twenty-four consecutive myopic children (24 eyes; mean age, 13.9 years) received EDOF CLs to control myopia progression and participated in the study. We measured the axial length (AL), spherical equivalent (SE), and choroidal thickness (CT) at baseline and after 1 year of lens wear and compared the changes. Results: The mean baseline AL, SE, and CT were, respectively, 26.31 mm, −6.38 diopter (D), and 235 μm, and at 1 year 26.40 mm (p = 0.03), −6.61 D (p = 0.05), and 244 μm (p = 0.18). The AL decreased in 20.8% of cases (≧−0.05 mm/year), whereas 20.8% and 58.4% of cases had stabilization of the AL or an increased AL (≧+0.05 mm/year), respectively. The patients with a decreased AL engaged in a mean outdoor activity time of 200.6 min/day, the patients with an increased AL (≧+0.05 mm/year) engaged in a mean outdoor activity time of 126.7 min/day. The change in the AL was correlated significantly with the change in the CT (β = −0.46, p < 0.05), and 80% of patients with a shortened AL had increased CT (≧+20 μm/year). Conclusions: Our data showed that the AL stabilized or decreased in over 40% of myopic patients wearing EDOF CLs.

  • Tropism of the AAV6.2 Vector in the Murine Retina

    Suzuki R*, Katada Y*, Fujii M, Serizawa N, Negishi K, Kurihara T†

    Int J Mol Sci. 26 ( 4 ) 1580 2025.02

    Last author, Corresponding author, Accepted,  ISSN  16616596

     View Summary

    Retinitis pigmentosa (RP) is a progressive inherited retinal dystrophy (IRD) that primarily affects rod photoreceptor cells, leading to the degeneration of photoreceptors and the gradual loss of vision. While RP is one of the most studied IRDs, other neurodegenerative diseases affecting the retina and optic nerve, such as glaucoma, also involve common mechanisms of cellular stress and degeneration. Current therapeutic approaches under investigation include gene therapy, retina prosthesis, and neuroprotection. Among these approaches, gene therapy has shown promise, though challenges related to viral vector tropism and transduction efficiency persist. The adeno-associated virus (AAV) vector is commonly employed for gene delivery, but novel serotypes and engineered variants are being explored to improve specificity and efficacy. This study evaluates the gene transfer efficiency of the AAV6.2 vector following intravitreal injection into the murine retina. Male C57BL/6 mice (9 weeks old) were intravitreally injected with 1 µL of AAV2-CMV-EGFP, AAV6-CMV-EGFP, or AAV6.2-CMV-EGFP at a titer of 3.2 × 1012 vg/mL per eye. Retinal transduction was assessed using in vivo fluorescence imaging, flat-mount imaging, and immunohistochemistry. EGFP expression in retinal ganglion cells, Müller cells, amacrine cells, and bipolar cells was quantitatively analyzed. All three AAV serotypes effectively transduced retinal ganglion cells, but AAV6.2 exhibited enhanced transduction in Müller cells and other neuronal retinal cells, including bipolar and amacrine cells. AAV6.2 demonstrated more localized expression around retinal blood vessels compared to the diffuse expression observed with AAV2. Immunohistochemical analysis revealed that AAV6.2 had significantly higher transduction efficiency in Müller cells (p < 0.001) compared to AAV2 and AAV6. AAV6.2 shows superior transduction efficiency in Müller cells, positioning it as a promising vector for gene therapies targeting retinal degenerative diseases such as RP. Its ability to effectively transduce Müller cells suggests potential applications in neuroprotection and gene replacement therapies.

  • 幼少期の強膜穿孔創から58年経過して外因性細菌性眼内炎を発症した1例

    上村綾音, 伴紀充, 國見洋光, 富田洋平, 栗原俊英, 篠田 肇, 根岸一乃

    眼科臨床紀要 17 ( 10 ) 749 - 752 2024.12

    Accepted

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Papers, etc., Registered in KOARA 【 Display / hide

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Reviews, Commentaries, etc. 【 Display / hide

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Presentations 【 Display / hide

  • Chemogenetic inhibition of suprachoroidal nucleus lead to ipsilateral myopia shift

    Toshihide Kurihara, Ziyan Ma, Tetsu Yoshida, Satoshi Imanishi, Shin-ichi Ikeda, Rachel Kwok, Kazuno Negishi, Kenji F Tanaka, Akihiro Yamanaka, Kazuo Tsubota

    ARVO 2025 Annual Meeting, 

    2025.05

  • 光遺伝学治療と慶應大でのロービジョンケア

    栗原俊英

    山梨県視覚障害を考える会 第39ロービジョンケア講習会, 

    2025.05

  • 一生涯を貫く仕事を持つという事

    栗原俊英

    名大緑内障カンファレンス 第4回特別講演, 

    2025.04

  • 近視病態理解の最前線

    栗原俊英

    第129回日本眼科学会総会 ランチョンセミナー25 「近視を科学する」, 

    2025.04

  • Myopia control by non-visual light responses

    栗原俊英

    第129回日本眼科学会総会 シンポジウム3 「科学は美しい 1・感覚のバイオイメージング最前線.様々な生命現象を可視化する」, 

    2025.04

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Research Projects of Competitive Funds, etc. 【 Display / hide

  • Establishment of therapeutic intervention methods for fibrotic scar formation in age-related macular degeneration through hypoxia response control

    2024.04
    -
    2027.03

    基盤研究(C), Principal investigator

  • 非視覚型光受容体による光マルチセンシング機構の解明と光新規治療法開発

    2022.10
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    2028.03

    国立研究開発法人日本医療研究開発機構(AMED), 令和4年度 「革新的先端研究開発支援事業(AMED-CREST)」, No Setting

  • 低酸素応答制御機能を持つ静岡県産魚類由来成分の探索と疾患制御に関する研究

    2022.08
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    2025.03

    静岡県, マリンバイオテクノロジーを核としたシーズ創出研究業務委託 ¥286,800,000-, No Setting

  • 低酸素応答を標的とした予防から治療までを網羅する網膜疾患制御技術開発

    2018.04
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    2021.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Principal investigator

  • Approach for retinal diseases based on regulation of hypoxia response

    2015.04
    -
    2018.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Principal investigator

Intellectual Property Rights, etc. 【 Display / hide

  • α1ブロッカーを含む近視進行抑制用点眼剤

    Date applied: 特願2024-519839  2022.08 

    Date published: WO2024/048750  2024.03 

    Date issued: 特許第7640163号  2025.03

    Date registered: 2025.02

    Patent

  • HIF抑制用組成物

    Date applied: 特願2021-504090  2020.03 

    Date issued: 特許第7598591号  2024.12

    Date registered: 2024.12

    Patent

Awards 【 Display / hide

  • 第46回日本光医学・光生物学会学術奨励賞(医学領域)

    栗原俊英, 2024.07, 日本光医学・光生物学会, 非視覚光受容による近視進行抑制に関わる脳内回路の探索

  • 日本眼科学会評議員会賞

    栗原俊英, 2024.04, 日本眼科学会, 光生物学を基盤とした眼疾患病態生理の理解と治療開発

  • 第62回日本網膜硝子体学会総会優秀演題

    Ayaka Naka, Deokho Lee, Yan Zhang, Chiho Shoda, Satoshi Imanishi, Hiroyuki Nakashizuka, Satoru Yamagami, Kazuno Negishi, Akiharu Kubo, Toshihide Kurihara, 2023.11, 日本網膜硝子体学会, Claudin-1 deficiency in RPE leads to age-related retinal degeneration in mic

  • The Keio Medical Science Rising Star Award

    Toshihide Kurihara, 2023.01, Keio University, Exploring the pathophysiology of the retina and myopia based on photobiology and the clinical adaptation

  • 第72回日本臨床眼科学会学術展示優秀賞

    栗原俊英, 2019.04, 日本眼科学会, 白内障手術患者を対象とした血漿-房水グルコース濃度相関の血糖変動状態による変化

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    第123回日本眼科学会総会

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Media Coverage 【 Display / hide

  • 光遺伝学を活用し、目の難病の視覚再生目指す 慶大など国内初の治験を開始

    サイエンスポータル, 国立研究開発法人 科学技術振興機構, 2025.03

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    神経細胞などの働きを光で制御する「光遺伝学」の手法を活用し、目の難病「網膜色素変性症」で失われた視覚の再生を目指す遺伝子治療薬の臨床試験(治験)を始めた、と慶應義塾大学と名古屋工業大学の共同研究グループが発表した。光遺伝学の臨床応用は国内初という。
    この目の難病は目の内側を覆い、光を受け取って神経の信号に変える働きをする網膜の視細胞が最初に障害を起こし、徐々に機能を失う進行性の失明難病。通常4000人から8000人に1人発症し、根本的な治療法は確立していない。世界の患者は200万人以上とされる。
    慶應大学医学部眼科学教室の栗原俊英准教授らの研究グループは、名古屋工業大学の神取秀樹教授らが開発した「キメラロドプシン」という光に対する感度が高い独自のタンパク質を使い、光遺伝学の手法を応用することで視覚再生効果と視細胞の保護効果があることをマウスで確認し、研究成果を2023年10月に発表していた。
    この成果を生かして慶應大学発のスタートアップ企業「レストアビジョン」(東京都港区)がキメラロドプシンの遺伝子治療薬(視覚再生治療製剤)「RV-001」を開発。栗原准教授らの研究グループは今回、既に視細胞の機能が失われた重症患者1人に対しRV-001を目に注射して1例目の投与を終えた。
    網膜にある双極細胞と呼ばれる神経細胞にキメラロドプシンを作る遺伝子を届け、視細胞の代わりに光の検知を担わせるのが目的。研究グループによると、これまで重い合併症などはないが、今後半年間経過を観察して安全性や有効性を確認する。今後6~15人を対象に治験を続ける予定だ。
    栗原准教授らの研究グループは「(治験を始めたRV-001は)視覚再生治療薬として世界初の実用化を目指す試みで、失明疾患に対する新たな治療法を提供する重要な一歩と位置付けられる」としている。
    光遺伝学は米スタンフォード大学のカール・ダイセロス教授が2005年に技術を確立した。脳研究に大きく貢献し、米国の医学賞であるラスカー賞(基礎分野)の20年授賞者に選ばれ、ノーベル賞の有力候補とされる。
    理化学研究所・脳科学総合研究センターの利根川進センター長(当時)らは2015年に「光遺伝学によってマウスのうつ状態を改善した」と発表した。現在はうつ病や睡眠障害、依存症など精神疾患の仕組みや臓器の働きの制御を研究する分野で活用されている。

  • すんどめ ~網膜色素変性症と生きる〜

    名古屋テレビ放送・テレビ朝日系列全国24社, テレメンタリー2024, 2024.11

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    "すんどめ"の新競技で全国制覇へ!「今を楽しむことが一番」難病がある高校生ボクサーと全盲のシングルマザー 遺伝性のある網膜色素変性症、研究の最前線は

    愛知県岡崎市の石川凌久さんは、“当てないスパーリング”とも呼ばれるマスボクシングに打ち込む高校2年生。母親の智美さんは、20代で網膜色素変性症という難病で失明した。凌久さんは、高校に入って”殴り合い”がある通常のボクシングをやりたいと思っていたが、受けて失明するのではないかと心配する智美さんの猛反対にあいマスボクシングを選んだ。網膜色素変性症は遺伝する可能性がある。視覚障がい者の選択に光を当てる。
    ナレーター:島貫凌アナウンサー
    名古屋テレビ放送

    https://www.tv-asahi.co.jp/telementary/backnumber/0257/

Memberships in Academic Societies 【 Display / hide

  • Japan Society for Ocular Circulation, 

    2025.04
    -
    Present
  • The Japanese Society for Photomedicine and Photobiology, 

    2023.05
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    Present
  • 日本ロービジョン学会, 

    2022.12
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    Present
  • 日本人類遺伝学会, 

    2021.07
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    Present

Committee Experiences 【 Display / hide

  • 2022.11
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    Present

    Associate Editor for Neurodegeneration, Frontiers in Neuroscience

  • 2022.10
    -
    Present

    眼科 外来医長, 慶應義塾大学病院