胰岛素可以缓解急性缺血诱导的心房动和心房结节功能障碍,ex vivo
Huiliang Qiu1, Fan Li1, Hannah Prachyl1
1Departments of Cardiovascular Medicine and Physiology and Biomedical Engineering and Center for Regenerative Biotherapeutics, Mayo Clinic Arizona, Scottsdale, Arizona, USA.
JCI insight
|November 14, 2024
概括
在缺血之前和期间服用胰岛素,通过改善心房电生理学和心脏模型中的处理,显著降低了术后心房动 (POAF) 的风险.
科学领域:
- 心脏病学 心脏病学
- 电子生理学 电子生理学
- 心脏的新陈代谢.
背景情况:
- 急性心房缺血是术后心房动 (POAF) 的已知触发因素.
- 将缺血与POAF联系在一起的确切机制仍然不完全理解.
- 了解这些机制对于制定有效的POAF预防策略至关重要.
研究的目的:
- 为了研究急性缺血/反在诱导心房 (AF) 中急性缺血/反的作用,在一个ex vivo心脏模型中.
- 评估胰岛素对预防缺血引起的AF的潜在治疗效果.
- 阐明因缺血引起的,因胰岛素减轻的电生理学和处理变化.
主要方法:
- 使用 ex vivo 兰登多夫输液来诱导隔离心脏中的急性缺血/再输液.
- 通过编程电刺激和光学映射评估AF诱导性.
- 量化了动力电位持续时间,有效耐火周期,导电速度和细胞内瞬态的变化.
主要成果:
- 与对照组相比,25分钟的缺血期显著增加了AF发生率.
- 右心房表现出比左心房更容易受到AF诱导的敏感性.
- 前缺血和再注射胰岛素的使用显著降低了AF的脆弱性,而仅进行再注射的胰岛素显示出有限的益处.
- 胰岛素治疗使心房电生理学和处理中的缺血引起的异常正常化.
结论:
- 胰岛素有效地减轻了急性缺血/再输血诱导的AF风险.
- 胰岛素的保护作用通过改善心房心肌细胞电生理学和处理来调解.
- 这项研究表明胰岛素是预防POAF的潜在治疗剂.
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