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Updated: May 7, 2026

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Use of Rabbit Eyes in Pharmacokinetic Studies of Intraocular Drugs
Published on: July 23, 2016
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局所および腸内投与のラニビズマブの数学モデル
Paul A Roberts1,2, Chloe N Thomas3, Gabriel Bellamy Plaice3
1Centre for Systems Modelling and Quantitative Biomedicine, University of Birmingham, Birmingham, United Kingdom.
Investigative ophthalmology & visual science
|August 20, 2025
まとめ
細胞に浸透するペプチド (CPPs) を併用した局所的なラニビズマブは,湿気性黄斑変性 (AMD) の治療に有望である. このアプローチは,血管内皮成長因子 (VEGF) を抑制することで,頻繁な腸内注射の必要性を減らすことができます.
科学分野:
- 眼科について
- 薬理学について
- バイオテクノロジー
背景:
- 湿気性黄斑変性 (AMD) は,血管内皮成長因子 (VEGF) によって刺激される異常な血管成長による視力低下を伴う.
- ラニビズマブのような現在の抗VEGF治療は 静脈内注射で投与され 侵襲的で費用がかかり リスクが伴います
- 細胞に浸透するペプチド (CPP) は,生物学的障壁を越えて局所薬の投与を強化する潜在的な方法を提供します.
研究 の 目的:
- 湿性AMDの代替治療として,CPPで強化された局所投与ラニビズマブの有効性を評価する.
- 局所投与のラニビズマブと,視野内投与のラニビズマブの薬物動態を比較する.
- 目部におけるVEGFレベルに対する局所的なラニビズマブ/CPPの影響を評価する.
主な方法:
- 豚の眼をex vivoで局所用ラニビズマブ/CPP,静脈内用ラニビズマブ/CPP,または静脈内用ラニビズマブで治療した.
- ラニビズマブとVEGFの濃度は,水分体とガラスの体内で,様々な時間帯でELISAを用いて測定された.
- 薬とVEGFの動態を異なる眼部部でシミュレートするために,通常の微分方程式モデルが開発されました.
主要な成果:
- 局所用ラニビズマブ/ CPPは水中のラニビズマブ濃度を大幅に増加させ,水中のVEGFを減少させた.
- 内治療 (CPPまたはCPPなし) は高濃度のラニビズマブとVEGFの有意な減少をもたらした.
- 数学的なモデリングにより,局所的な治療は,注射の間に持続的で適度なVEGF抑制をもたらすことが示唆されました.
結論:
- 細胞に浸透するペプチドは,局所用ラニビズマブの角膜浸透を容易にする.
- 局所治療と静脈内治療を併用することは,湿潤型AMDの注射頻度を潜在的に減らすための有望な戦略です.
- ラニビズマブのVEGFへの結合 afinityまたはその眼内レジデンスの時間を高めると,治療の有効性がさらに向上する可能性があります.
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