SOD3 regulation of redox sensitive signaling in pulmonary vascular diseases

SOD3 对肺血管疾病中氧化还原敏感信号的调节

• 批准号: 10610425
• 负责人: Eva S. Nozik
• 金额: $ 57.14万
• 依托单位: UNIVERSITY OF COLORADO DENVER
• 依托单位国家: 美国
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-06-01 至 2025-05-31
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/10610425
• 关键词: Age; Animal Model; Award; Binding; Biology; Blood Vessels; CD44 gene; Cell Communication; Cells; Development; Disease; Electron Spin Resonance Spectroscopy; Extracellular Matrix; Fibroblasts; Fibrosis; Foundations; Funding; Future; Gene Expression; Genetic Polymorphism; Growth; Half-Life; Homeostasis; Human; Hyaluronan; In Vitro; Individual; Inflammasome; Inflammation; Knock-in; Knowledge; Location; Lung; Macrophage; Metabolism; Mission; Modification; Mouse Strains; Mus; Natural Immunity; Oxidation-Reduction; Pathogenesis; Pathologic; Precision Medicine Initiative; Predisposition; Property; Pulmonary Circulation; Pulmonary Hypertension; Regulation; Research; Research Infrastructure; Research Project Grants; Resource Sharing; Series; Severities; Signal Pathway; Signal Transduction; Superoxide Dismutase; Testing; Transforming Growth Factor beta; Translating; Translations; Vascular remodeling; Work; antioxidant enzyme; design; enzyme activity; epigenetic regulation; experimental study; extracellular; improved; in vivo; individual variation; insight; mitochondrial dysfunction; new therapeutic target; novel therapeutic intervention; programs; pulmonary vascular disorder; receptor; response; tool

The overall mission of this research program is to determine how the antioxidant enzyme, extracellular superoxide dismutase (EC-SOD or SOD3) regulates redox-sensitive signaling pathways responsible for inflammation and fibrosis in pulmonary vascular diseases across the age span, and harness this knowledge to design new and precise therapies. The different research projects are based on three complementary themes. Theme 1 interrogates the regulation of SOD3 expression, activity and distribution in the healthy and diseased pulmonary circulation in the mature and immature lung. These studies would include in vitro, and in vivo studies using animal models, as well as activity translating the work through new human studies. They will address the multiple levels of SOD3 regulation, including genetic polymorphisms, epigenetic regulation, or other post-translation SOD3 modifications, that can influence gene expression, enzyme activity, half-life and localization. Theme 2 evaluates how changes in SOD3 activity or binding properties impact redox sensitive signaling pathways that are responsible for the development of pulmonary vascular disease, in particular, inflammation and subsequent vascular remodeling and fibrosis. These experiments utilize a unique series of SOD3 mouse strains, including a mouse with knock-in of a known human SOD3 polymorphism, to interrogate how individual changes in SOD3 location or content can influence disease pathogenesis and severity. Based on the unique extracellular localization of SOD3, studies will test the effects of insufficient SOD3 on matrix integrity, matrix-cell interactions, cell-cell interactions and communication between extracellular signals and intracellular cellular responses. Ongoing studies are testing how the loss of vascular SOD3 increases the susceptibility of two key redox-sensitive targets localized to the extracellular matrix (ECM): activation of latent TGF-β, which enhances PASMC and fibroblast growth, inflammation and synthetic function, or oxidative fragmentation of hyaluronan, which binds to macrophage CD44 receptors and activates the NLRP3 inflammasome. Future planned studies will test how altered SOD3 impacts the redox landscape to modulate innate immunity, cellular metabolism and mitochondrial dysfunction responsible for vascular fibrosis in PH. Theme 3 translates the findings into new therapeutic strategies to replenish deficient SOD3 to restore redox homeostasis. This framework is supported by a new initiative, funded by a Dean's Strategic Infrastructure Research Committee Award for the purchase of an electron paramagnetic resonance spectrometer, to develop a collaborative and interdisciplinary UCD Redox Biology Shared Resource Facility to advance the study of Redox Biology. These studies collectively will provide new insight relevant to the mission of the Precision Medicine Initiative, as they will uncover how individual variables that influence SOD3 impact the development of inflammation and fibrosis in pulmonary hypertension.

该研究计划的总体任务是确定抗氧化剂酶如何细胞外酶 超氧化物歧化酶（EC-SOD或SOD3）调节负责氧化还原敏感的信号通路 整个年龄跨度的肺血管疾病的炎症和纤维化，并利用这些知识 设计新的和精确的疗法。不同的研究项目基于三个完整的主题。 主题1询问健康和犹豫不决的SOD3表达，活性和分布的调节 成熟和未成熟肺中的肺循环。这些研究将包括体外和体内 使用动物模型的研究以及通过新的人类研究转化工作的活动。他们会的 解决SOD3调节的多个水平，包括遗传多态性，表观遗传调节或 其他翻译后SOD3修饰，可能影响基因表达，酶活性，半衰期和 本土化。主题2评估SOD3活动或结合特性的变化如何影响氧化还原敏感 尤其是肺血管疾病发展的信号通路， 炎症和随后的血管重塑和纤维化。这些实验利用了一系列独特的 SOD3小鼠菌株，包括具有已知人类SOD3多态性敲入的小鼠来审问 SOD3位置或内容的个体变化如何影响疾病的发病机理和严重程度。基于 关于SOD3的独特细胞外定位，研究将测试SOD3对矩阵的影响不足 完整性，基质细胞相互作用，细胞细胞相互作用以及细胞外信号和 细胞内细胞反应。正在进行的研究正在测试血管SOD3的损失如何增加 位于细胞外基质（ECM）的两个关键氧化还原敏感靶标的敏感性：潜在的激活 TGF-β增强了PASMC和成纤维细胞生长，感染和合成功能或氧化功能 透明质酸的碎片，该透明质酸与巨噬细胞CD44受体结合并激活NLRP3 炎症。未来计划的研究将测试变化的SOD3如何影响氧化还原景观以调节 先天免疫，细胞代谢和线粒体功能障碍，导致pH中的血管纤维化。 主题3将发现转化为新的治疗策略，以复制不足的SOD3以恢复氧化还原 稳态。该框架得到了一项新计划的支持，由院长的战略基础设施资助 购买电子顺磁共振光谱仪的研究委员会奖，以开发 协作和跨学科的UCD氧化还原生物学共享资源设施，以促进研究 氧化还原生物学。这些研究集体将提供与精确任务有关的新见解 医学计划，因为他们将发现影响SOD3的个别变量如何影响发展 肺动脉高压中的炎症和纤维化。