脊柱炭化水素制約核酸RNAの混合動力学を調節する
Tamilselvan Rajasekaran1, Graeme C Freestone2, Rodrigo Galindo-Murillo3
1Department of Chemistry, Université de Montréal, Quebec H3C 3J7, Canada.
Journal of the American Chemical Society
|January 18, 2022
まとめ
オリゴヌクレオチド (ON) 骨格の柔軟性を制限する. マクロサイクリックONはより速い解離で安定性を低下させ,ロックされた核酸 (LNA) ONは二重安定性を改善した.
科学分野:
- 薬剤化学
- オリゴヌクレオチド療法
- 分子生物物理学
背景:
- 治療用オリゴヌクレオチド (ON) 結合親和度は,結合率 (ka) と分離率 (kd) に依存する.
- 単一鎖のONは柔軟性があり,標的RNAとのハイブリッド化を阻害する可能性があります.
- 背骨の形状を調節することは,ハイブリッド化運動を最適化するために重要です.
研究 の 目的:
- 糖-リン基骨の周りの回転を制限することで,補完的なRNAのための混合動力学を調節できるかどうかを調査する.
- 背骨制 ON アナログのための炭化水素ブリッジ設計を最適化するために分子動態シミュレーションを使用する.
- ハイブリダイゼーション特性を改善するために,バックボーン制約を持つ改造されたONを合成し,評価する.
主な方法:
- 背骨の制約のための炭化水素ブリッジの設計を導くために分子ダイナミックシミュレーションを使用しました.
- リングクロージングメタテシスを用いて脊髄制限型核酸トリマーを合成し,オリゴヌクレオチドに組み込みました.
- オリゴヌクレオチド組立のための固体支柱への結合によるインシット合成による組み込みのフォスフォラミジット.
主要な成果:
- 15基のマクロサイクル制約されたON類は,類似した/改善されたオンレートを示したが,DNAONと比較してデュプレックス安定性を大幅に増加させた.
- ロックされた核酸 (LNA) ONは,DNA ONと同様のオンレートを示したが,非常に遅いオフレートで,二重安定性を高める.
- 実験データは,一般的に,制約されたバックボーンONアナログの分子動力学シミュレーション予測を支持した.
結論:
- バックボーン制約戦略は,オリゴヌクレオチド混合動力学を調節することができます.
- 分子ダイナミクスシミュレーションは,次世代の制限されたバックボーンONアナログの設計のための予測ツールとして機能します.
- LNAのような最適化されたバックボーン制約は,ダプレクスの安定性と治療の可能性を向上させることができます.
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