DNA改変されたポリマー孔は,チャネルフルースのpHと電圧による制御を可能にします
Steven F Buchsbaum1, Gael Nguyen, Stefan Howorka
1School of Physical Sciences, University of California , Irvine, California 92697, United States.
Journal of the American Chemical Society
|July 4, 2014
まとめ
研究者らは,生物学的チャネルを模倣するスマートな合成ナノポールを開発した. これらのDNAベースの毛穴は,pHと電圧の変化に反応し,先進的なバイオセンシングと薬物投与アプリケーションを可能にします.
科学分野:
- マテリアルサイエンス 材料科学
- バイオテクノロジー バイオテクノロジー
- ナノテクノロジー ナノテクノロジー
背景:
- 生物学的イオンチャネルは,pHや電圧のような刺激を通して細胞の輸送を制御する.
- これらのチャネルを模倣することは,バイオセンシングと薬物投与におけるスマート膜の鍵です.
研究 の 目的:
- pHとトランスメブランポテンシャルに対する二重反応性を持つ合成ナノポールを開発する.
- 先進的なアプリケーションのためのスマートメンブランを設計する.
主な方法:
- 陽子化可能な塩基を持つDNAオリゴーマーを非対称なナノ孔開口に結合する.
- 孔の閉塞のためにpH誘発の静電網形成を利用する.
- ナノメカニカル運動と電流調節のための電圧スイッチングを使用します.
主要な成果:
- DNAの静電メッシュ形成により,pH5.5で前例のない孔抵抗 (数十ギガオーム) を達成した.
- DNAのナモメカニカル運動による中性pHと電圧変化による可逆電流調節が実証された.
- 14nmまでのナノ孔に対するpH依存の可逆性閉塞メカニズムの強度が確認されました.
結論:
- pHと電圧の刺激に基づいた合成ナノ孔ゲーティングのための新しいコンセプトが成功裏に実証されました.
- 静電網メカニズムは,ナノ孔内のイオン輸送を制御するための堅牢な方法を提供します.
- このアプローチは,バイオセンシング,薬物配送,および様々な有機ポリマーに適応可能なイオン回路における潜在的な応用があります.
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