早期的多西环林短期治疗可以调节心脏病发作后的左心室重塑
Francisco J Villarreal1, Michael Griffin, Jeffrey Omens
1Department of Medicine, University of California, San Diego, Calif, USA. fvillarr@ucsd.edu
Circulation
|September 4, 2003
概括
心肌梗塞 (MI) 后早期的多西环林治疗通过抑制矩阵金属蛋白酶 (MMP) 和保护细胞外矩阵 (ECM) 来保护心脏结构和功能. 这种方法减少了心室重塑,改善了心脏结果.
科学领域:
- 心血管研究研究心血管研究
- 生物医学工程 生物医学工程
- 药理学 药理学是指药理学的学科.
背景情况:
- 心肌梗塞 (MI) 触发了矩阵金属蛋白酶 (MMP) 的激活和细胞外矩阵 (ECM) 的降解.
- 这一过程有助于不良的心脏重塑和左心室 (LV) 功能受损后MI.
研究的目的:
- 为了研究早期的,短期的多克西环素 (DOX) 治疗是否可以通过在心脏病发作后维持本地ECM来保护心脏结构和功能.
- 评估DOX对LV重塑和MMP活动的影响.
主要方法:
- 老鼠接受了假手术,MI或MI,其次是DOX治疗 (30 mg/kg/天口服,从MI前48小时开始,持续48小时后).
- 在MI后2周和4周评估了LV形态,心脏功能 (压力-体积循环) 和MMP活性.
- 组织学分析评估了肌细胞大小,壁厚度和原含量.
主要成果:
- 在MI后4周,DOX治疗显著降低了心脏重量与身体重量比,肌细胞横截面积和LV内部直径.
- DOX保留了前壁厚度,并没有改变心脏病发作痕内的原蛋白/肌肉面积分数.
- 施用DOX将压力-体积关系和被动表心应变向正常值转移,表明心脏功能得到改善.
结论:
- 在MI后使用多西环林对MMPs进行简短的早期抑制,可以保持LV结构和功能.
- 在冠状动脉封闭后早期保持本地ECM可以缓解心室重塑.
- 这一策略支持早期MMP抑制在治疗后心脏病发作后心脏功能障碍方面的治疗潜力.
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