循環性ペプチドの腸内浸透性:共通の主要な脊髄モチーフが特定されました
Johannes G Beck1, Jayanta Chatterjee, Burkhardt Laufer
1Institute for Advanced Study and Center for Integrated Protein Science at the Technische Universität München, Department Chemie, Lichtenbergstrasse 4, 85747 Garching, Germany.
Journal of the American Chemical Society
|June 29, 2012
まとめ
研究者らは,2つのペプチド構造を特定し,Caco-2細胞の透過性が高い. N-メチル化パターンは,これらのペプチド療法薬の経口生物利用性を達成するための鍵です.
科学分野:
- ペプチド化学と薬物の発見.
- 構造生物学と生体物理学.
- ファルマコキネティクスと薬物投与.
背景:
- ペプチド治療薬は,経口での生物利用性に問題があり,臨床使用を制限しています.
- 小分子生物利用性に関する既存の規則はペプチドには適用されません.
- ペプチド構造と透過性の関係を理解することは,口服用ペプチド薬の開発において極めて重要です.
研究 の 目的:
- 高度Caco-2透過性のペプチド構造を特定し,特徴づけること.
- ペプチドの経口生物利用性におけるN-メチル化パターンの役割を調査する.
- 経口生物利用可能なペプチド薬剤候補のテンプレートとしてのこれらの構造の可能性を調査する.
主な方法:
- 異なるN-メチル化による54のサイクル (((-D-Ala-Ala (((5)-) ペプチドのライブラリの合成とスクリーニング.
- Caco-2細胞の浸透性アッセイは,薬物の吸収可能性を評価するためのものです.
- 構造分析は,重要な構造特性を決定する (例えば,ベータターン,シスペプチド結合).
主要な成果:
- 2つの異なる,高度にCaco-2透過性のペプチドテンプレート構造が特定されました.
- オールトランステンプレートは,高透度のためにD-Ala(1) とAla(6) で特定のNメチル化を必要とする.
- シングル-cisテンプレートでは,Ala(5) 前にcisペプチド結合があり,D-Ala(1) がN-メチル化されている場合にのみ,高い透過性を示します.
結論:
- 特定されたペプチドテンプレートにおける高Caco-2浸透性を達成するために,特定のN-メチル化パターンは極めて重要です.
- 特定された構造は,ソマトスタチンの類似体やサイクロスポリンAなどの口服生物利用可能なペプチドと類似性を共有しています.
- これらのCaco-2浸透性テンプレートは,新しい経口生物利用可能なペプチド療法を開発するための有望な戦略を提供します.
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