Engineered Heart Tissue and Atrial Phenotyping Scientific Core 1

SC 1项目总结 心房颤动是最常见的心律失常。房颤的终生风险随着 年龄增长和其他风险因素，包括肥胖、吸烟、高血压和糖尿病。心房 纤维性颤动通常是一种进行性疾病，通常开始于短暂的发作， 在没有药物或电击诱导的心脏复律的情况下不会终止的发作。的成本和 随着美国人口老龄化和肥胖率的增加， 增加，从而强调需要干预和治疗，可以减缓进展和减少 心房颤动的负担。GWAS后房颤的总体目标：治疗机制 PPG应用程序是将AF基因组发现转化回床边，专注于基因， 机制，基因对药物，以及基因与代谢和环境的相互作用。我们的中央 假设是，增加我们对遗传、代谢和 心房的结构变化将使我们能够确定可能的目标， 战略布局工程心脏组织和心房表型科学核心1（SC 1）将提供 通过两个目标支持PPG应用程序中的所有项目。目标1将维持和传播诱导 多能干细胞（iPSC），将iPSC分化为心房或心室样心肌细胞（a-iCM，v-iCM）， 由此产生工程心脏组织并维持心房成纤维细胞。目标2将协调收缩， iCM、EHT和小鼠LA的代谢和结构表型。SC 1为人类提供了独特的途径， a-iCM以及a-EHT将使该PPG的所有研究者能够以 协调和高效的方式。虽然我们在大多数研究中关注a-iCM和a-EHT， 在该计划中，我们还支持使用v-iCM和v-EHT的研究，这将有助于区分心房与心室 方面的影响.我们在生成和维护人类iCM和EHT方面的经验为以下方面提供了机会： 我们PPG内部的项目使用这种领先的技术来测试创新的假设。重要的是，使用 这些实验模型的表型分析，包括收缩功能的评价， 线粒体呼吸、线粒体含量、亚细胞结构和RNA的分离确保了 方法，并将这些技术提供给个人 实验室，否则不可行。SC 1消除了重复劳动，并优化了 人员、设备和物资。SC 1提供的独特专业知识将支持本PPG的目标， 将房颤基因组的发现带回临床

SC1 PROJECT SUMMARY Atrial fibrillation is the most common cardiac arrhythmia. The lifetime risk of atrial fibrillation increases with advancing age and other risk factors that include obesity, smoking, hypertension, and diabetes mellitus. Atrial fibrillation is often a progressive condition, frequently beginning with brief episodes that progress to longer episodes that do not terminate without either drug- or electrical shock induced cardioversion. The cost and health burden of atrial fibrillation are expected to rise as the American population ages and the obesity rates increase, thus highlighting the need for interventions and therapies that can slow the progression and reduce the burden of atrial fibrillation. The overall goal of the Atrial Fibrillation Post-GWAS: Mechanisms to Treatment PPG application is to translate AF genomic discoveries back to the bedside, focusing on genes to mechanisms, genes to drugs, and interactions of genes with metabolism and environment. Our central hypothesis is that increasing our knowledge about molecular mechanisms involved in genetic, metabolic and structural changes in the atria will allow us to pinpoint possible targets for safer and more effective therapeutic strategies. The Engineered Heart Tissue and Atrial Phenotyping Scientific Core 1 (SC1) will provide support for all Projects in this PPG application via two aims. Aim 1 will maintain and propagate inducible pluripotent stem cells (iPSCs), differentiate iPSCs to atrial- or ventricular-like cardiomyocytes (a-iCM, v-iCM), from these create engineered heart tissues, and maintain atrial fibroblasts. Aim 2 will coordinate the contractile, metabolic, and structural phenotyping of iCMs, EHTs, and mouse LA. SC1 provides unique access to human a-iCMs, as well as a-EHTs that will enable all investigators on this PPG to achieve their scientific goals in a coordinated and efficient manner. While we focus on a-iCMs and a-EHTs for most of the studies proposed in the Program, we also support studies using v-iCMs and v-EHTs that will help differentiate atrial vs. ventricular effects. Our experience with generating and maintaining human iCMs and EHTs provides an opportunity for Projects within our PPG to use this leading-edge technology to test innovative hypotheses. Importantly, the use of SC1 expertise for the phenotyping of these experimental models, including evaluation of contractile function, mitochondrial respiration, mitochondrial content, subcellular structure, and isolation of RNA ensures uniform methodology across multiple models, through all projects, and makes these techniques available to individual laboratories that were otherwise not feasible. SC1 eliminates duplication of effort and optimizes the use of personnel, equipment, and supplies. The unique expertise provided by SC1 will support the goal of this PPG to translate AF genomic discoveries back to the bedside.