使用人类工程心脏组织建模心律
Chengyi Tu1, Arianne Caudal2, Yu Liu2
1Stanford Cardiovascular Institute, Stanford University, Stanford, CA, USA. cytu@stanford.edu.
Nature protocols
|August 1, 2025
概括
研究人员开发了一种新型的人体工程心脏组织模型,以研究心跳动脉冲引起的心肌病. 这种体外模型克服了动物研究的局限性,为心脏功能障碍的机械探索提供了一个高通量平台.
科学领域:
- 生物医学工程 生物医学工程
- 心血管研究研究心血管研究
- 干细胞生物学 干细胞生物学
背景情况:
- 心率升高和节律不规则可能导致心脏功能障碍,称为心动减速诱导的心肌病.
- 传统上使用大型动物模型,但在成本和吞吐量方面存在局限性.
- 需要更相关,更有效的模型来研究这种情况.
研究的目的:
- 开发和验证第一个工程人类心肌模型,用于研究心跳动脉冲引起的心肌病.
- 克服心脏研究中传统动物模型的局限性.
- 为机械探索与心律相关的心脏疾病提供一个平台.
主要方法:
- 人工工程心脏组织的制造和成熟.
- 组装一个可编程的电刺激系统.
- 功能分析和与现有模型和患者数据进行分子比较.
主要成果:
- 工程心脏组织模型成功地重复了心动脉冲动引起心肌病的临床特征.
- 该模型显示了高吞吐量和对人类遗传学的相关性.
- 分子数据验证了模型的实用性,与狗模型和人类患者相比.
结论:
- 一个使用人造肌心脏的新体外模型为研究高心率诱导心肌病提供了强大的工具.
- 这种模型提高了吞吐量和人类遗传的相关性,使得更深入的机械洞察力.
- 工作流可以适应创建各种心血管疾病的复杂心脏模型.
相关概念视频
01:27Anatomy of the Heart
The human heart is made up of three layers of tissue that are surrounded by the pericardium, a membrane that protects and confines the heart. The outermost layer, closest to the pericardium, is the epicardium. The pericardial cavity separates the pericardium from the epicardium. Beneath the epicardium is the myocardium, the middle layer, and the endocardium, the innermost layer. There are four chambers of the heart: the right atrium, the right ventricle, the left atrium, and the left ventricle.
01:16Heart Valves
The human heart is a complex organ with an intricate system of valves that regulate blood flow. There are two main types of valves: atrioventricular (AV) valves and semilunar valves.
The AV valves prevent the backflow of blood from the ventricles to the atria during ventricular contraction. These valves function with the assistance of the chordae tendineae and papillary muscles. When the ventricles are relaxed, the chordae tendineae are slack, allowing blood to flow from the atria into the...
The AV valves prevent the backflow of blood from the ventricles to the atria during ventricular contraction. These valves function with the assistance of the chordae tendineae and papillary muscles. When the ventricles are relaxed, the chordae tendineae are slack, allowing blood to flow from the atria into the...
01:20Anatomy of the Heart
The heart is a hollow, muscular organ approximately the size of a fist, consisting of four chambers. It is enclosed in the pericardium, a fibrous sac with two layers: the visceral and parietal pericardium, separated by a fluid-filled space containing serous fluid to reduce friction.
The heart has three layers: the innermost endocardium, the muscular myocardium, and the outer epicardium, all working together for optimal cardiac function.
Chambers of the Heart
The heart is made up of four...
The heart has three layers: the innermost endocardium, the muscular myocardium, and the outer epicardium, all working together for optimal cardiac function.
Chambers of the Heart
The heart is made up of four...