動脈硬化性病変のサイズと脆弱性は,流体切断ストレスのパターンによって決定されます
Caroline Cheng1, Dennie Tempel, Rien van Haperen
1Department of Cardiology, Thoraxcenter, Erasmus MC, University Medical Center, Rotterdam, The Netherlands.
Circulation
|June 7, 2006
まとめ
低シアストレスは,動脈の脆弱な動脈硬化性プラーク形成を促進します. 逆に,シアストレスの増加は,病変の発生を防ぎ,渦を伴う振動性シアストレスは,安定した病変につながります.
科学分野:
- 心血管生物学 心血管生物学
- バイオメディカルエンジニアリング
- 翻訳医学は翻訳医学である.
背景:
- 動脈硬化性病変は,低圧または振動性剪定ストレスを伴う動脈で一般的に形成されます.
- 動脈硬化性プラークの脆弱性に対するシアストレスの直接的な影響は,適切なin vivoモデルが不足しているため,不明のままです.
研究 の 目的:
- 剪定ストレスパターンと動脈硬化性プラーク形成と脆弱性の間の因果関係を調査する.
- 異なる切断ストレス条件下でのプラークの組成と再構成を特徴付ける.
主な方法:
- ネズミの動脈動脈における新型の周周動脈切断ストレスの修正剤の開発.
- ローカライズされた領域の誘導により,下降した,増加した,および振動的な (渦) 切断ストレスが発生します.
- 動脈硬化病変の発達,組成,および血管再構築の分析.
主要な成果:
- 動脈硬化性病変は,下降したまたは振動的切断ストレスの領域にのみ形成されます.
- 切断ストレスが増加した地域は,損傷の発生から保護されました.
- シャーストレスの低下は,脆弱なフェノタイプ (滑らかな筋肉の細胞が少なく,コラーゲンが少なく,脂質が多く,外向的な改造が増加し,炎症媒介体が増加し,マトリックスメタルプロテインアース活性) の大きな病変を誘発しました.
- プラーク内出血は,低減した切断ストレスの領域でのみ発生しました.
結論:
- 下降および振動性剪定ストレスの両方がプラーク形成に不可欠です.
- シャーストレスの低下は,より大きく,脆弱な動脈硬化性プラークの発達を促進します.
- 振動的切断ストレスは,特に渦によって,安定した病変の形成に寄与します.
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