リン酸ペプチドの折りたたみ機能パラダイムを解き放ち,細胞内タンパク質相互作用の不浸透な阻害物質を供給する
Stephen E Miller1, Kohei Tsuji1, Rachel P M Abrams2
1Chemical Biology Laboratory, National Cancer Institute, National Institutes of Health, Frederick, Maryland 21702 United States.
Journal of the American Chemical Society
|November 11, 2020
まとめ
N-メチル化により,有毒な膜リチックペプチド (MLP) が安全な輸送手段に変換されます. このペプチド変異は細胞溶解を減少させながらも細胞への侵入を維持し,効果的な細胞内薬物投与を可能にします.
科学分野:
- 生物化学
- 分子生物学
- 薬物の配達
背景:
- メンブランリチックペプチド (MLP) は,細胞膜と相互作用する能力があるため,細胞内薬物投与に有望である.
- しかし,MLPの固有の毒性は,細胞解離と狭い治療窓を引き起こすことによって,その臨床的応用を制限する.
研究 の 目的:
- MLPを細胞間互換性のある伝達器に変換するための新しい戦略を開発する.
- MLPの活動と細胞への侵入に対するペプチド骨幹のNメチル化の影響を調査する.
主な方法:
- MLPから得られたN-メチル化ペプチドのライブラリを合成した.
- N-メチル化の効果を評価するために,構造-活性関係の研究を実施した.
- ペプチド誘発細胞溶解と細胞侵入効率の評価
- タンパク質とタンパク質の相互作用阻害剤の細胞への投与が実証された.
主要な成果:
- ペプチド骨幹のNメチル化により,細胞表面でのMLPの折りたたみが抑制され,溶解の可能性が低下する.
- この変異は細胞への侵入を最小限に抑えて,細胞内への投与にペプチドの有用性を保ちます.
- この戦略は,様々な二次構造 (βシートおよびヘリックス形成ペプチド) で有効であることが証明された.
- 細胞内でのタンパク質相互作用阻害剤の投与に成功し,標的への作用を示した.
結論:
- ペプチド骨幹のNメチル化は,MLPからより安全で効果的な細胞内伝達器を作るための実行可能な戦略です.
- このアプローチは,細胞溶解から細胞の侵入を切り離すことで,MLPの治療可能性を高めます.
- この方法は タンパク質相互作用阻害剤などの 困難な治療用荷物を運ぶのに 有望です
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