ポリマーソーム: 二重ブロックコポリマーから作られた頑丈なベジクル
B M Discher1, Y Y Won, D S Ege
1School of Engineering and Applied Science, and Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA.
まとめ
ブロックコポリマーから作られた巨大ポリマーソームは,天然の脂質膜と比較して優越した性および水浸透性が低下しています. これらの合成ベジクルは,薄殻のカプセルという有望な新しいクラスを提供します.
科学分野:
- マテリアルサイエンス 材料科学
- バイオフィジックス 生物物理学
- ポリマー化学のポリマー化学について
背景:
- 自然の細胞膜は,フォスフォリピドで構成されています.
- リピド二重層は,生物学的ベジクルとリポソームの基礎を形成する.
- 脂質二重層に対する合成代替物の理解は,バイオミメティックアプリケーションにとって極めて重要です.
研究 の 目的:
- アンフィフィリック・ディブロック・コポリマーを用いて,ポリマーベースの水泡 (ポリマーソーム) を合成し,特徴づけること.
- ポリマーソームの機械的および浸透性特性を天然の脂質膜と比較する.
- 合成カプセルとしてのポリマーソームの可能性を調査する.
主な方法:
- アンフィフィリック二重ブロックコポリマー (ポリエチレン酸化物-ポリエチレチレン,EO40-EE37) を用いて膀を形成した.
- ミクロマニピュレーション技術は,膀の特徴化のために使用されました.
- 機械的特性 (曲げ方,面積拡大モジュール) と水浸透性が測定されました.
主要な成果:
- ポリマーソームは,脂質膜に匹敵する膜屈曲と領域拡大モジュールを示した.
- 巨大ポリマーソームは,破裂前に著しく高い性およびより高い領域張力耐性を示した.
- ポリマーソーム膜は,フォスフォリピド二重層と比較して,水の浸透性が少なくとも10倍減少したことを示しました.
結論:
- ブロックコポリマーベースのポリマーソームは,堅固な合成ベジケルの新しいクラスを表しています.
- これらのポリマーソームは,強化された機械的強度と低透性を有し,重要な側面において天然の脂質膜を上回る.
- ポリマーソームは,高度な合成薄殻カプセルを開発するための有望なプラットフォームを提供します.
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