Macrophage Lipid Homeostasis and Inflammatory Signaling
Macrophage Lipid Homeostasis and Inflammatory Signaling
批准号:
10161852
负责人:
STEVEN J BENSINGER
金额:
$45.88万
依托单位国家:
美国
项目类别:
财政年份:
2019
资助国家:
美国
项目状态:
已结题
起止时间:
2019-05-01 至 2024-04-30
关键词:
AddressAffectAnti-Inflammatory AgentsArterial Fatty StreakAtherosclerosisAttenuatedBindingBiochemicalCardiovascular DiseasesCell membraneCell physiologyCellsCellular ImmunityCholesterolCholesterol HomeostasisCytosolDataDendritic CellsDevelopmentDiseaseDyslipidemiasEnsureEventGenesGenetic ModelsGoalsGram-Positive BacteriaHealthHomeostasisImageImmuneImmunityImmunologic ReceptorsInfiltrationInflammationInflammatoryInflammatory ResponseInterferon-betaInterferonsIsotope LabelingIsotopesLaboratoriesLinkLipidsMass Spectrum AnalysisMembraneMetabolicMitochondriaModelingMolecularMovementMusMutationPathogenesisPathologicPathway interactionsPhysiologyPositioning AttributeProductionProteinsReagentRegulationRoleShotgunsSignal PathwaySignal TransductionSterilityStimulator of Interferon GenesTLR2 geneTLR3 geneTechniquesTechnologyTestingTherapeutic InterventionToll-like receptorsTracerWorkadvanced analyticsatherogenesisbasechemoproteomicscholesterol traffickingcytokinedesignexpectationfatty acid biosynthesishuman diseaseimmune functionlipid metabolismlipid transportlipidomelipidomicsloss of functionmacrophagemouse modelnovelnovel strategiesresponsetraffickingviral RNA
中文摘要
项目2:巨噬细胞、脂质、动态平衡和炎症信号传导。
摘要/摘要:
今年PPG计划的第二个项目的主要目标是进一步了解细胞内脂质成分的变化和脂质的贩运。
影响巨噬细胞的炎症反应功能。尽管在血脂和动态平衡方面存在一些扰动。
在许多常见的人类疾病中,人们认识到它可能与炎症有关,这有助于我们更好地理解它是如何发生的。
而原因仍然是有限的。最近的一项研究显示,促炎症因子发出了重新编程血脂的信号。
巨噬细胞的代谢状态。但它也不能变得更加明确,即血脂和动态平衡的紊乱是不可能的。
通过检测巨噬细胞的炎症反应机制,从而诱导和调节炎症反应。
反应。因此,血脂、动态平衡和炎症反应是相互关联的,它们之间的扰动相互影响。
在这个项目中,我们的PPG测试团队将把先进的、基于分析和质谱学的测试方法与相结合。
遗传病是炎症反应的模型,其主要目标是通过研究炎症反应的驱动因素来定义疾病的发生机制。
对亚细胞进行重新编程(反之亦然)。我们不会评估改变亚细胞结构的后果。
血脂水平取决于炎症性信号转导。一个具体的目标是进一步应用先进的分析测试技术来确定。
促炎症和抗炎信号如何改变巨噬细胞中主要的亚细胞脂质体结构。我们将继续使用这些物质。
光谱分析方法,包括猎枪、脂质组学、纳米SIMS、成像、核素和同位素标记,据介绍。
了解支持和抗炎药物的信号如何影响中国的脂质本地化进程和人口贩运活动。
巨噬细胞。它的特异性靶向2被认为是通过改变胆固醇和动态平衡来确定其调控机制。
加强信号通路的刺激性。我们将继续研究我们的新发现,即新的胆固醇代谢中存在扰动。
合成将通过刺激改变I型干扰素的炎症反应。它使用一种新的生化药物的组合。
方法,包括共聚焦技术和NanoSIMS技术,包括成像、扫描和化学蛋白质组学,我们现在将不会检验这一假设。
胆固醇通过直接结合来调节刺痛功能。我们还将测试是否与疾病相关。
基因突变可能会消除高胆固醇对监管机构的影响。具体的目标是什么,目前还不能确定。
信号转导通路的重要性与血脂异常、炎症、癌症和糖尿病的发生发展密切相关。
动脉粥样硬化的发生在小鼠中存在。目前还没有研究表明,I型干扰素对动脉粥样硬化的发病机制有影响,但对动脉粥样硬化的影响不大。
这种不孕不育和炎症性免疫反应的潜在分子途径尚未完全阐明。我们将继续测试这一机制。
假设CcGAS/STING是产生I型干扰素所必需的。
血脂异常和动脉粥样硬化。这些研究将不会确定刺激信号通路对动脉粥样硬化的影响。
血脂异常、炎症、免疫反应、细胞浸润、肿瘤和动脉粥样硬化的发展。这是我们最大的预期。
拟议中的研究将进一步定义,尤其是在分子水平上,为什么巨噬细胞-脂质-动态平衡的失调是驱动因素。
炎症,以及炎症如何影响巨噬细胞、胆固醇和代谢在心血管疾病中的作用。
我们的PPG团队非常兴奋,因为我们提出了我们的假设,我们已经确定了我们的定位,以及所有这些实验性的方法。
试剂,专家和合作者,希望能取得更快的进展。
英文摘要
Project 2: Macrophage Lipid Homeostasis and Inflammatory Signaling
ABSTRACT/SUMMARY
The objective of Project 2 of this PPG is to understand how cellular lipid composition and lipid trafficking
influence the inflammatory function of macrophages. Although perturbations in lipid homeostasis are
recognized to be associated with inflammation in a number of human diseases, our understanding of “how”
and “why” remains limited. Recent work has revealed that pro-inflammatory signals reprogram the lipid
metabolic state of macrophages. It has also become clear that perturbations in lipid homeostasis can be
sensed by the inflammatory machinery of macrophages so as to induce and to regulate inflammatory
responses. Thus, lipid homeostasis and inflammation are interrelated, and perturbations in one affect the other.
In this project, our PPG team will combine advanced analytical mass spectrometry–based approaches with
genetic models of inflammation, with the goal of defining mechanisms by which inflammation drives
reprogramming of the lipidome (and vice versa). We will assess the consequences of changing the subcellular
levels of lipids on inflammatory signaling. Specific Aim 1 is to apply advanced analytic techniques to determine
how pro- and anti-inflammatory signals change the subcellular lipidome in macrophages. We will use mass
spectrometry approaches, including shotgun lipidomics, NanoSIMS imaging, and isotope labeling, to
understanding how pro- and anti-inflammatory signals influence lipid localization and trafficking in
macrophages. Specific Aim 2 is to determine the mechanisms by which alterations in cholesterol homeostasis
potentiate the STING signaling pathway. We will pursue our discovery that perturbations in de novo cholesterol
synthesis change type I IFN inflammatory responses via STING. Using a combination of biochemical
approaches, confocal and NanoSIMS imaging, and chemoproteomics, we will test the hypothesis that
cholesterol regulates STING function through direct binding. We will also test whether disease-associated
mutations in STING abrogate the regulatory impact of cholesterol. Specific Aim 3 is to determine the
importance of the STING signaling pathway on the development of dyslipidemia, inflammation, and
atherogenesis in mice. Type I IFNs have been shown to influence the pathogenesis of atherosclerosis, but the
molecular pathways underlying this sterile inflammatory response have not been elucidated. We will test the
hypothesis that the cGAS/STING inflammatory axis is required to generate type I IFN in the setting of
dyslipidemia and atherosclerosis. These studies will define the influence of the STING pathway on
dyslipidemia, inflammation, immune cell infiltration, and atheroma development. It is our expectation that our
proposed studies will define, at a molecular level, why dysregulation of macrophage lipid homeostasis drives
inflammation, and how inflammation influences macrophage cholesterol metabolism in cardiovascular disease.
Our PPG team is excited by our hypotheses, and we are positioned, with all of the experimental approaches,
reagents, and expert collaborators, to make rapid progress.
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