RhoE-mediated Sterile Inflammation Regulation in Acute Myocardial Infarction.

项目说明/摘要 根据2016年美国心脏协会的报告，大约有55万美国人新患上了 来自心肌梗死(MI)(定义为首次住院的MI)和200,000例复发病例。大约， 每42秒就会有一名美国人发生心肌梗死。虽然许多因素对心肌梗塞患者的预后有影响， 两个主要决定因素是初始梗死大小和心肌梗死后恢复过程的效率。 临床上，现代经皮冠状动脉介入治疗(Pci)，也就是血管成形术，显著减少了 梗塞的范围。然而，随后的伤口愈合过程，是由 由动态的无菌炎症，是复杂和难以捉摸的。更好地了解无菌炎症 急性心肌梗死期间的分子调控非常重要，并为心肌梗死后的所有阶段奠定了基础 治疗学。 在这项提议中，我们开发了一种心脏特异性RhoE(一种小G蛋白，也称为RND3)缺乏- 易患心肌梗塞的小鼠品系。RhoE单倍体缺陷小鼠表现出强烈的炎症反应 心肌梗死后心功能受损。 我们提出了多种系统的方法，包括蛋白质-蛋白质相互作用的体外分析，细胞 培养实验和体内遗传动物评估，采用功能丧失和功能获得策略 探讨RhoE表达水平与心肌梗死后炎症调控的关系。 RhoE介导的不孕症炎症调节的详细分子机制将被阐明。 首次将RhoE与炎症调节联系在一起。我们认为RhoE是一种新的“微调” 位于炎症反应结合点的因子，负责平衡无菌炎症 急性心肌梗塞后。 动物模型包括心脏特异性条件性RhoE缺陷小鼠和心脏特异性RhoE缺陷小鼠。 过表达转基因小鼠。这一建议的机械性发现应该会产生临床意义。 鉴于心力衰竭患者RhoE显著下调的事实。这一发现将提供一种 为今后的药学翻译奠定了基础。

PROJECT DESCRIPTION/ABSTRACT Based on the 2016 American Heart Association report, there are about 550,000 Americans newly suffering from myocardial infarction (MI) (defined as first hospitalized MI) and 200,000 recurrent cases. Approximately, one American will have an MI every 42 seconds. While many factors contribute to the prognosis of MI patients, two major determinants are the initial infarction size and the efficiency of the post-MI recovery process. Clinically, modern percutaneous coronary intervention (PCI), known as angioplasty, significantly decreases the extent of the infarction. However, the subsequent wound healing processes, which are initiated and driven by dynamic sterile inflammation, are complicated and elusive. A better understanding of sterile inflammation molecular regulation during acute MI is highly significant, and lays the foundation for all stages of post-MI therapeutics. In this proposal, we have developed a cardiac-specific RhoE (a small G protein, also called Rnd3) deficient- mouse line that is susceptible to MI. RhoE haploinsufficient mice exhibit an intense inflammatory response with compromised cardiac function after MI. We propose multiple systemic approaches including in vitro analysis of protein-protein interactions, cell culture experiments, and in vivo genetic animal assessments with loss- and gain-of-function strategies to investigate the relationship between the expression levels of RhoE and the regulation of post-MI inflammation. The detailed molecular mechanism of RhoE-mediated sterile inflammation regulation will be elucidated. For the first time, RhoE is linked to inflammation regulation. We suggest that RhoE is a new “fine-tuning” factor situated at the nexus of the inflammatory response, and is responsible for balanced sterile inflammation after acute MI. The animal models include heart specific conditional RhoE-deficient mice as well as heart specific RhoE- overexpression transgenic mice. The mechanistic findings from this proposal should result in clinical implications given the fact of significant downregulations of RhoE in heart failure patients. The discovery will provide a foundation for future pharmacological translation.