脂質二重層を通してポリ-L-リジンの移動
Fredric M Menger1, Victor A Seredyuk, Marina V Kitaeva
1Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA. menger@emory.edu
Journal of the American Chemical Society
|March 6, 2003
まとめ
巨大な膀は,ポリ-l-ライシンでロープのような構造を形成する. これらの構造には,脂質とポリ-l-リジンが含まれており,膀への薬物の投与を説明しています.
科学分野:
- バイオフィジックス 生物物理学
- マテリアルサイエンス 材料科学
- ナノテクノロジー ナノテクノロジー
背景:
- 巨大膀は,細胞膜のモデルシステムである.
- ポリ・1・ライシン (Poly-l-lysines) は,生物医学的な応用の可能性のあるカチオン性ポリペプチドである.
- 膀と膜の相互作用を理解することは,薬剤の投与において極めて重要です.
研究 の 目的:
- ポリ-l-リジンとの相互作用で巨大な膀内のロープのような構造の形成と組成を調べる.
- ポリ-l-リシンが膀に侵入するメカニズムを解明する.
- 薬物の浸透を媒介するこれらの構造の役割を調査する.
主な方法:
- 中性およびアニオン性脂質を含む巨大膀製剤.
- ポリ-l-リジンの様々な分子量との相互作用に関する研究.
- エピ-光顕微鏡では,光で標識された脂質とポリ-l-リジン.
- ポリアクリル酸とフローレスセインイソチオシアネートによるマイクロインジェクション実験.
主要な成果:
- 状の構造は,ポリ-l-リジンと接触すると,体内で形成されます.
- 中性およびアニオン性脂質,およびポリ-l-リシンの両方が,これらのロープの構成要素です.
- Poly ((アクリル酸) 誘発されたロープ収縮は,ポリカーション/ポリアニオン相互作用を示しています.
- 光でラベルを貼ったポリ・ル・ライシンは,ロープにその存在を確認した.
- ポリ-l-ライシン結合,ドメイン形成,および膀入りを含むモデルが提案されました.
結論:
- ポリ-l-リジンは,脂質ベジクル内の内部ロープのような構造の形成を誘導する.
- これらの構造は,静電相互作用によって媒介される脂質とポリ-l-リジンで構成されています.
- 提案されたモデルは,ポリー-l-ライシンが膀の浸透とドクソルビシンなどの薬物の投与における役割を説明する.
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