pHとアンフィフィリック構造は,生物機能組成の超分子行動に直接作用する.
Tyson J Moyer1, Joel A Finbloom, Feng Chen
1Institute for BioNanotechnology in Medicine and ∥Department of Medicine, Feinberg School of Medicine, Northwestern University , Chicago, Illinois 60611, United States.
Journal of the American Chemical Society
|October 14, 2014
まとめ
研究者らは,自己組織化してナノファイバーまたは球体になるpH感度の高いペプチドアンフィフィルを設計した. これらのナノ構造は,酸性腫瘍環境で形状を変化させ,がんナノ医薬品の薬剤包装と投与を改善します.
科学分野:
- 超分子化学とは
- 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:
- 超分子自己組み立ては,ナノ構造の形態学と刺激に対する反応の制御を可能にします.
- 刺激に反応するシステムの開発は,標的の薬物投与に不可欠です.
研究 の 目的:
- 腫瘍の微小環境に反応してナノ構造の形状を制御するpH感受性ペプチドアンフィフィール (PAs) を設計する.
- 薬剤のカプセル化と腫瘍の蓄積に対するpH誘発の形態学的移行の影響を評価する.
主な方法:
- オリゴヒスティジンH6配列を組み込んだ2つのペプチドアンフィフィール (PAs) を合成した.
- アリファティック・テール・プレイスメントに基づくナノファイバーまたは球状ミセルへの自己組み立てが調査されました.
- 評価されたpH依存の分解とpH6.0と6.5.5の間の可逆的な形態学的変化.
- カンプトテシン (CPT) のカプセル化効率を異なるナノ構造で評価した.
- pH感受性ナノファイバーの量化腫瘍蓄積と対照群の比較.
主要な成果:
- PAsは,アリファティック・テール・ポジションによって制御される異なるナノスケール形態 (ナノファイバーまたは球状ミセル) を形成した.
- 両方のPA型はヒスティジンのプロトネーションにより,酸性条件 (pH6.0-6.5) で可逆分解を示した.
- H6ベースのナノファイバーは,カンプトセチンのカプセル化効率が最大60%に達し,球形のミセルに比べて7倍に増加しました.
- pH感受性ナノファイバーは,球状ミセルと形状変化しないナノファイバーと比較して,腫瘍の蓄積が強化されたことを実証しました.
結論:
- pHの変化によって引き起こされる超分子ナノ構造の形態学的移行は,薬剤の封じ込めと腫瘍の蓄積に大きな影響を与えます.
- 超分子自己組み立ての分子設計は,ナノ医薬品の薬理学的特性を高めるために調整することができます.
- pH感受性ペプチドアンフィフィルは,進行がんナノセラピーの開発に有望なプラットフォームを提供します.
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