YAP1, neointima formation, and blood pressure regulation
YAP1、新内膜形成和血压调节
基本信息
- 批准号:10040710
- 负责人:
- 金额:$ 12.29万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2020
- 资助国家:美国
- 起止时间:2020-08-05 至 2022-07-31
- 项目状态:已结题
- 来源:
- 关键词:AcetatesActinsAngioplastyAngiotensin IIAnimal ModelAntihypertensive AgentsArterial InjuryAtherosclerosisAttenuatedBiological AssayBlood PressureBlood VesselsCardiovascular DiseasesCause of DeathCell Culture TechniquesCollaborationsDataDeoxycorticosteroneDiseaseEtiologyExhibitsGenesGenetic TranscriptionGoalsHypertensionImpairmentIn VitroInfusion proceduresInjuryKnockout MiceLuciferasesMeasuresMediatingMuscle ContractionPRKCA genePharmacologyPhasePhenotypePlatelet-Derived Growth FactorPlatelet-Derived Growth Factor beta ReceptorPreventionProteinsRegulatory PathwayReporterResearchResistanceRoleSignal TransductionSingle Nucleotide PolymorphismSmooth MuscleSmooth Muscle MyocytesSodium ChlorideStructureTelemetryTestingTrainingTransgenic AnimalsUnited StatesVascular DiseasesVascular Smooth MuscleVascular remodelingVascular resistanceVasoconstrictor Agentsbasebeta Actinblood pressure reductionblood pressure regulationcareergenome wide association studygenomic locusin vivoindexinginhibitor/antagonistinsightloss of functionmouse modelneointima formationnovelnovel therapeutic interventionnovel therapeuticspolymerizationreceptorresponserestenosistranscription factortranslational approachvascular smooth muscle cell proliferation
项目摘要
PROJECT SUMMARY
Vascular smooth muscle cell (VSMC) phenotypic modulation is central to the etiologies of multiple vascular wall
diseases. In post-angioplasty restenosis and atherosclerosis, VSMCs acquire a proliferative/migratory
phenotype leading to neointima formation. In contrast, hypertension is largely caused by increased vascular
resistance that is attributed to exaggerated VSMC contraction and vascular remodeling. Identification of the key
players that regulate VSMC proliferation and contraction is critical for further understanding of the underlying
mechanisms of VSMC-driven vascular wall diseases and also for developing novel therapeutic approaches. We
have previously demonstrated that the transcription co-factor yes-associated protein 1 (YAP1) promotes VSMC
proliferation. Yet, the role and underlying mechanisms of YAP1 in neointima formation in vivo remain unclear.
Furthermore, recent genome-wide association studies (GWAS) have identified a loss-of-function single
nucleotide polymorphism (SNP) in YAP1 gene locus that was unexpectedly associated with lower blood
pressure, suggesting a novel role of YAP1 in blood pressure regulation. The overarching goal of this proposal is
to determine the role of YAP1 in regulating both VSMC proliferation and contraction/hypertension. Novel
preliminary data in this proposal include 1) YAP1 expression is upregulated after arterial injury and correlates
with VSMC proliferation in vivo, 2) YAP1, in association with TEA domain transcription factor 1 (TEAD1), induces
platelet-derived growth factor receptor beta (PDGFRb), a putative novel YAP1 target gene that regulates VSMC
phenotype, 3) SM-specific Yap1 knockout mice exhibit a hypotensive phenotype and an attenuated response to
vasoconstrictors in isolated vessels, and 4) silencing YAP1 in VSMCs inhibited protein kinase C alpha (PRKCa)
signaling and impaired actin polymerization, which are key for VSMC contraction. Three specific aims are
proposed to test the central hypothesis that YAP1 induces VSMC proliferation and contraction to drive neointima
formation and hypertension, respectively. K99 Aim 1. Test the hypothesis that YAP1 induces PDGFRb to
promote VSMC proliferation and enhance injury-induced neointima formation in vivo. R00 Aim 2. Test the
hypothesis that YAP1 activates PRKCa signaling and promotes actin polymerization to enhance VSMC
contraction. R00 Aim 3. Test the hypothesis that VSMC-expressed YAP1 underlies experimental hypertension.
Completion of the proposed studies will provide novel insights into the mechanisms regulating VSMC phenotypic
modulation and blood pressure regulation and will determine if inhibiting YAP1 is an attractive novel therapeutic
strategy for ameliorating both occlusive vascular diseases and hypertension. Additional conceptual and
experimental training in hypertension-related research during the K99 phase will help the applicant pursue an
independent career and transform this proposal into an R01 application during the R00 phase.
项目摘要
血管平滑肌细胞 (VSMC) 表型调节是多血管壁病因的核心
疾病。 在血管成形术后再狭窄和动脉粥样硬化中,VSMC 获得增殖/迁移能力
导致新内膜形成的表型。 相比之下,高血压很大程度上是由于血管紧张素增加引起的。
阻力归因于 VSMC 过度收缩和血管重塑。 密钥的识别
调节 VSMC 增殖和收缩的参与者对于进一步了解潜在的机制至关重要
VSMC 驱动的血管壁疾病的机制,以及开发新的治疗方法。 我们
先前已证明转录辅助因子 yes 相关蛋白 1 (YAP1) 促进 VSMC
增殖。 然而,YAP1 在体内新内膜形成中的作用和潜在机制仍不清楚。
此外,最近的全基因组关联研究 (GWAS) 已经确定了一种功能丧失的单
YAP1 基因位点的核苷酸多态性 (SNP) 意外地与较低的血液相关
压力,表明 YAP1 在血压调节中具有新的作用。 该提案的总体目标是
确定 YAP1 在调节 VSMC 增殖和收缩/高血压中的作用。 小说
本提案中的初步数据包括 1) YAP1 表达在动脉损伤后上调并与之相关
与 VSMC 体内增殖有关,2) YAP1 与 TEA 域转录因子 1 (TEAD1) 相关,诱导
血小板衍生生长因子受体 β (PDGFRb),一种假定的调节 VSMC 的新型 YAP1 靶基因
表型,3) SM 特异性 Yap1 敲除小鼠表现出低血压表型和减弱的反应
孤立血管中的血管收缩剂,以及 4) 沉默 VSMC 中的 YAP1 抑制蛋白激酶 C α (PRKCaα)
信号传导和肌动蛋白聚合受损,这是 VSMC 收缩的关键。 三个具体目标是
建议测试 YAP1 诱导 VSMC 增殖和收缩以驱动新内膜的中心假设
分别是形成和高血压。 K99 目标 1. 检验 YAP1 诱导 PDGFRb 的假设
促进 VSMC 增殖并增强体内损伤诱导的新内膜形成。 R00 目标 2. 测试
假设 YAP1 激活 PRKCa 信号传导并促进肌动蛋白聚合以增强 VSMC
收缩。 R00 目标 3. 测试 VSMC 表达的 YAP1 是实验性高血压的基础这一假设。
完成拟议的研究将为调节 VSMC 表型的机制提供新的见解
调节和血压调节,并将确定抑制 YAP1 是否是一种有吸引力的新型治疗方法
改善闭塞性血管疾病和高血压的策略。 额外的概念和
K99 阶段高血压相关研究的实验培训将帮助申请人追求
独立职业生涯,并在 R00 阶段将此提案转化为 R01 申请。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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{{ truncateString('Islam Osman', 18)}}的其他基金
YAP1, neointima formation, and blood pressure regulation
YAP1、新内膜形成和血压调节
- 批准号:
10731404 - 财政年份:2022
- 资助金额:
$ 12.29万 - 项目类别:
YAP1, neointima formation, and blood pressure regulation
YAP1、新内膜形成和血压调节
- 批准号:
10229472 - 财政年份:2020
- 资助金额:
$ 12.29万 - 项目类别:
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