血栓激素和组织因子通路抑制剂在快节奏的老鼠心脏内脏中的心脏
Takeshi Yamashita1, Akiko Sekiguchi, Yu-ki Iwasaki
1The Cardiovascular Institute, Roppongi 7-3-10, Minato-ku, Tokyo 106-0032, Japan. yamt-tky@umin.ac.jp
Circulation
|November 12, 2003
概括
心房动 (AF) 扰乱心房内脏功能,降低抗凝固因子,如血栓模块素 (TM) 和组织因子通路抑制剂 (TFPI). 这种不平衡促进了前庭血块的形成.
科学领域:
- 心血管研究研究心血管研究
- 血栓形成和血液静止.
背景情况:
- 心房动 (AF) 是血栓塞栓症的主要心脏病原性原因.
- 现有的理论侧重于AF中血流减少和高凝血能力.
- 内心功能障碍在AF相关的血栓形成中的作用不太清楚.
研究的目的:
- 调查AF是否通过影响心房内心功能来诱导局部凝血失衡.
- 在AF模型中检查关键抗凝血因子,血栓模块素 (TM) 和组织因子通路抑制剂 (TFPI) 的表达.
主要方法:
- 通过快速心房节奏诱导一种小鼠模型的阳性心房动 (AF).
- TM和TFPI的基因表达量化使用核糖核酶保护试验.
- 蛋白质水平和局部性被通过西式涂抹和免疫组织化学评估.
主要成果:
- 8小时的快速心房节奏显著降低了TM和TFPI的mRNA和蛋白质水平在左心室,但不是心室.
- 免疫组织化学显示,在节拍之后,心房内心脏中TM和TFPI表达的丧失.
- 这种下调会导致心房内抗凝剂屏障的缺陷.
结论:
- 通过快速节奏来诱导急性AF,降低了心房内心中TM和TFPI基因表达的调节.
- 这导致心房内心表面的局部凝血失衡.
- 这些发现支持了补充AF缺少抗凝剂分子的潜在治疗益处.
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