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凝块向性等离子体激活剂的血栓溶解特征. 确定强度和初始和最大速率的参数
P Holvoet1, M Dewerchin, J M Stassen
1Center for Thrombosis and Vascular Research, University of Leuven, Belgium.
Circulation
|March 1, 1993
概括
用纤维素特异性抗体向复合单链尿素酶类型等离子体激活剂 (rscu-PA) 增强其血栓解毒功效. 这种方法可以改善凝块向,而不会改变最大溶解速率或滞后阶段,为血栓溶解疗法提供了一个有前途的策略.
科学领域:
- 生物化学 生物化学
- 药理学 药理学是指药理学的学科.
- 血栓形成研究研究
背景情况:
- 纤维素特异性单克隆抗体可以向血原激活剂对血栓,从而可能增加血栓解毒功效.
- 重组单链尿素酶类型等离子体激活剂 (rscu-PA) 是一个关键的血栓解毒剂.
研究的目的:
- 为了确定纤维素特异性单克隆抗体 (MA-12B3和MA-15C5) 的凝块结合动力学.
- 为了评估与这些抗体 (rscu-PA/MA-12B3和rscu-PA/MA-15C5) 相结合的rscu-PA和组织类型等离子体激活剂 (rt-PA) 的血栓解压功效和溶解动力学,与未结合的rscu-PA和组织类型等离子体激活剂相比.
主要方法:
- 在子和子体内研究,使用体外动脉静脉环和肺动脉血栓.
- 评估凝块与血液的比率,体内凝块溶解,血栓解毒功效,血清除,最大溶解速率和滞后阶段.
- 使用125I标记的抗体和连续的放射性同位素扫描进行监测.
主要成果:
- 在子中,MA-12B3的血凝血比MA-15C5高得多.
- rscu-PA/抗体结合物在子体内表现出剂量相关的血块溶解,与rscu-PA和rt-PA相比显著增强血栓解毒效力.
- 结合剂的血清除速度较慢,最大溶解速率相似,最小滞后阶段与未结合剂相似.
结论:
- 用纤维素特异性抗体准rscu-PA的凝块显著增加了其血栓解毒功效,主要是由清除和结合特性驱动的.
- 虽然抗体向增强了功效,但它并没有显著改变血块溶解的最大速率或最小滞后阶段.
- 这些动态参数似乎独立于特定的等离子素激活剂和准策略.
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