特別にフォン・ウィレブランド因子との血小板相互作用を抑制するように設計されたヘパリン
M Sobel1, K E Bird, R Tyler-Cross
1Division of Vascular Surgery, Medical College of Virginia, Virginia Commonwealth University, Richmond, USA.
Circulation
|March 1, 1996
まとめ
研究者は血小板とフォン・ウィレブランド因子 (vWF) の相互作用を阻害するより強力なヘパリンを開発し,動脈栓塞の予防に不可欠です. これらの改変されたヘパリンは,血小板の集積とvWF結合の抑制を強めたことを示しています.
科学分野:
- 心血管研究に関する研究.
- バイオケミストリー バイオケミストリー
- 薬理学 薬理学とは
背景:
- フォン・ウィレブランド因子 (vWF) との血小板相互作用は,心血管介入において極めて重要です.
- 血小板/vWFメカニズムに対するヘパリンの干渉は,vWFのグリコプロテインIb結合領域に結合することを含む.
- 既存のヘパリンは,血小板/VWFの相互作用の抑制を強化するために精製する必要があります.
研究 の 目的:
- 血小板/VWFの相互作用に対する効能を増強したヘパリンを開発・精製する.
- vWFに依存する血小板機能に対するヘパリンの抑制効果を強化する方法を調査する.
主な方法:
- ヘパリン分化のためにvWFのヘパリン結合ドメインの不動化合成ペプチドを使用した.
- 標準ヘパリンに周期性酸化とボロヒドリド還元を含む化学的改変を施した.
- 高効能ヘパリン分子を分離するために,アフィニティクロマトグラフィを適用した.
主要な成果:
- 新型ヘパリン分子は,vWF依存の血小板凝結と結合を抑制する7倍の増加を示しました.
- 化学的に改変されたヘパリンは,血小板/VWFの相互作用を抑制する三倍増強を示した.
- アフィニティクロマトグラフィでは,抗凝固剤の活性が低下した8倍以上の阻害力を持つヘパリンが得られました.
結論:
- ヘパリン亜種は,vWF/血小板相互作用の抑制を大幅に強化するために設計することができます.
- ヘパリンのvWFを阻害する能力は,その抗トロンビン結合活動から分離することができます.
- 結合された親和分離と化学改変戦略は,動脈栓塞の予防のためにヘパリンを生成することができます.
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