破裂した動脈硬化性プラークの上の血栓形成と,進化する血栓の上のレトロンボシス
L Badimon1, J H Chesebro, J J Badimon
1Cardiovascular Biology Research, Massachusetts General Hospital, Harvard Medical School, Boston 02114.
Circulation
|December 1, 1992
まとめ
冠動脈疾患におけるプラーク破裂は,血栓形成につながる. 局所的および全身的要因がこのプロセスに影響し,残留血栓は,抗凝固薬を使用しても,再閉塞を引き起こす可能性があります.
科学分野:
- 心血管科学の研究について
- トロンボシスと血液静止症
- 動脈硬化症の病原性 病原性
背景:
- 不安定なアンギナと心筋梗塞は,しばしば,不規則な境界を持つ変な冠状動脈狭窄症を含み,破裂した動脈硬化性プラークと血栓形成を示します.
- 血管鏡検査と解剖では,急性冠動脈症候群における重要な出来事として,プラークの破裂と血栓形成が確認されています.
研究 の 目的:
- 動脈硬化性プラーク破裂後の血栓性に影響を与える局所的および全身的要因を調査する.
- 再閉塞における残留血栓の役割と抗凝固薬の有効性を理解する.
主な方法:
- プラークの破裂と血栓のシミュレーションは,ex vivo perfusion 室を使用しています.
- 豚のインビヴォモデルで血栓形成過程を研究した.
- リコンビナントヒルジンを利用して,レトロンボシスのトロンビンの役割を調べました.
主要な成果:
- プラークの破裂は基板を露出させ,損傷に比例する血栓形成につながります.
- 狭窄性病変における高い切断率は,血小板の堆積と血栓の成長を促進します.
- エピネフリン,コレステロール,および繊維分解の障害などの全身的要因は,血栓形成性を増加させる可能性があります.
- 残留血栓は,ヘパリン化血液でも,再閉塞に大きく寄与する.
- オリジナル・トロンブスの内のフィブリンと結合するトロンビンは,レトロンボシスに役割を果たします.
結論:
- 局所血管壁因子 (被曝基板,流体動力学) と全身因子 (ホルモン,脂質,繊維分解) は,プラーク破裂後の血栓形成性を決定的に調節する.
- 残留血栓は強力な血栓生成表面であり,再閉塞に寄与する.
- 線維素に結合するトロンビンをターゲットにすることは,再閉塞を防ぐ戦略かもしれません.
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