Flow regulation of the Alk1/Eng pathway in vascular homeostasis and disease

项目总结 流体剪应力依赖的血管重塑是胚胎发育的重要调节机制 在发育和成人血管动态平衡中，它能优化流向目标组织的血液流动。反过来说，联合国- 或调节不当的重塑会导致血管畸形，而不良的重塑是血液的一个关键方面 冠状动脉和外周动脉疾病的血流限制。我们的初步数据显示，监管机构的存在 具有两种相互抑制状态的网络，一种与血管稳定性相关，另一种与生理相关 外向重构或病理性动静脉畸形形成。这些结果允许我们提出一个统一的假设 将生理和病理重构联系起来，并提示控制点的存在可以 被操纵以增加或减小血管管腔直径。该项目旨在阐明这些 调节机制，然后利用这些新的见解来调查它们与血管的相关性 发展，为患有过度病理重塑的HHT患者确定治疗靶点， 并确定冠状动脉和外周动脉疾病患者的治疗目标 重塑受损。我们将定义这种新的EC剪应力机制的分子基础，确定 它的生物学作用，并在此基础上开发和测试治疗应用。

PROJECT SUMMARY Fluid shear stress-dependent vessel remodeling is an essential regulatory mechanism in embryonic development and in adult vascular homeostasis where it optimizes blood flow to target tissues. Conversely, un- or mis-regulated remodeling results in vascular malformations, while poor remodeling is a key aspect of blood flow restriction in coronary and periphery artery disease. Our preliminary data reveal the existence of a regulatory network with two mutually inhibitory states, one associated with vessel stability and one with physiological outward remodeling or pathological AVM formation. These results allow us to propose a unifying hypothesis that links physiological and pathological remodeling, and suggest the existence of control points that can be manipulated to either increase or decrease vascular lumen diameter. The project aims to elucidate these regulatory mechanisms and then harness these new insights to investigate their relevance to vascular development, to identify therapeutic targets for HHT patients who suffer from excessive pathological remodeling, and identify therapeutic targets for coronary and peripheral artery disease patients where physiological remodeling is impaired. We will define the molecular basis of this novel EC shear stress mechanism, determine its biological role and develop and test therapeutic applications based on this knowledge.