Signaling activation and constraints in maintaining immune homeostasis
维持免疫稳态的信号激活和限制
基本信息
- 批准号:10619849
- 负责人:
- 金额:$ 39万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2023
- 资助国家:美国
- 起止时间:2023-09-01 至 2028-07-31
- 项目状态:未结题
- 来源:
- 关键词:ADP ribosylationAddressAnimalsArabidopsisArchitectureAreaAutoimmune DiseasesAutoimmunityBiochemicalBiological ModelsCell DeathCell membraneCell surfaceCellsComplexDefectGenesGeneticGenetic ScreeningGenetic TranscriptionGoalsHomeostasisImmuneImmune responseImmune signalingImmune systemImmunityImmunologic ReceptorsInfectionInfection preventionInnate Immune ResponseInnate Immune SystemInsectaInterdisciplinary StudyKnowledgeLaboratoriesLigandsLinkMAP Kinase ModulesMammalsMediatingMedical ResearchMissionMolecularNatural ImmunityPathogen detectionPatternPattern recognition receptorPeptidesPerceptionPhosphorylationPhosphotransferasesPlantsPost-Translational Protein ProcessingPost-Translational RegulationPostdoctoral FellowReceptor ActivationResearchSeriesSignal PathwaySignal TransductionToll-like receptorsTranslationsUbiquitinationUnited States National Institutes of Healthcombinatorialgraduate studentimmune activationmicrobialpathogenposttranscriptionalreceptorreceptor-mediated signalingtraining opportunityundergraduate student
项目摘要
The innate immune system detects pathogen-derived molecules to prevent infections via specialized immune
receptors. The immune receptors include cell surface-resident pattern recognition receptors (PRRs), such as
Toll-like receptors (TLRs) in mammals and receptor kinases (RKs) in plants, and intracellular NOD-like
receptors (NLRs) in plants and mammals. Plant PRRs detect conserved pathogen-associated molecular
patterns (PAMPs), whereas NLRs recognize pathogen-specific effectors, culminating in a unified immune
system. How the signaling networks underlying PRR- and NLR-mediated immunity are interconnected remains
largely unknown. In addition, defects or over-activation of immune receptors could lead to cell death or
autoimmunity. Thus, understanding the mechanisms that enable or constrain PRR and NLR activation for
maintaining immune homeostasis is particularly important. The PI’s laboratory has developed a series of
sensitive and high-throughput genetic screens to dissect the complex activation and signaling mechanisms in
plant immunity, and revealed the importance of malectin-like RKs (MLRs) as a molecular module at the plasma
membrane linking PRR and NLR immune receptors. PI’s long-term goal is to elucidate the signaling networks
regulating innate immune responses using Arabidopsis as a model system and expand the knowledge of how
hosts fend off infections without causing autoimmune disorders. The proposed research rooted in PI’s previous
discoveries and preliminary studies will support a series of projects that address several critical knowledge
gaps in two interrelated research areas. First, the research will elucidate how the PRR- and NLR-mediated
signaling pathways converge into an interconnected and balanced immune response. Specifically, the projects
will mechanistically address how a PRR-activated MAP kinase cascade regulates NLR-mediated immune
homeostasis through MLRs perceiving different peptide ligands. Second, the research will decipher the
immune gene orchestration through the combinatorial action of the layered transcriptional, posttranscriptional,
and posttranslational regulations at the single-cell level. The projects will focus on how intertwined
posttranslational modifications, including ADP-ribosylation, ubiquitination, and phosphorylation, regulate
immune-specific gene transcription, stability, and translation. The proposed interdisciplinary research will
provide ample training opportunities for diverse undergraduate and graduate students and postdoctoral fellows.
先天免疫系统检测病原体衍生分子,通过专门的免疫来预防感染
受体。免疫受体包括细胞表面驻留的模式识别受体(PRR),例如
哺乳动物中的 Toll 样受体 (TLR) 和植物中的受体激酶 (RK) 以及细胞内 NOD 样受体
植物和哺乳动物中的受体(NLR)。植物 PRR 检测保守的病原体相关分子
模式(PAMP),而 NLR 识别病原体特异性效应器,最终形成统一的免疫
系统。 PRR 和 NLR 介导免疫的信号网络如何相互关联仍然存在
很大程度上不为人知。此外,免疫受体的缺陷或过度激活可能导致细胞死亡或
自身免疫。因此,了解启用或限制 PRR 和 NLR 激活的机制
维持免疫稳态尤为重要。 PI实验室开发了一系列
敏感和高通量的遗传筛选,以剖析复杂的激活和信号传导机制
植物免疫,并揭示了类 malectin RK(MLR)作为等离子体分子模块的重要性
连接 PRR 和 NLR 免疫受体的膜。 PI 的长期目标是阐明信号网络
使用拟南芥作为模型系统调节先天免疫反应,并扩展如何调节先天免疫反应的知识
宿主抵御感染而不引起自身免疫性疾病。拟议的研究植根于 PI 之前的研究
发现和初步研究将支持一系列解决几个关键知识的项目
两个相关研究领域的差距。首先,该研究将阐明 PRR 和 NLR 是如何介导的
信号通路汇聚成相互关联且平衡的免疫反应。具体来说,这些项目
将机械地解决 PRR 激活的 MAP 激酶级联如何调节 NLR 介导的免疫
通过 MLR 感知不同的肽配体实现稳态。其次,研究将破译
通过分层转录、转录后、
以及单细胞水平的翻译后调控。这些项目将重点关注如何相互交织
翻译后修饰,包括 ADP-核糖基化、泛素化和磷酸化,调节
免疫特异性基因转录、稳定性和翻译。拟议的跨学科研究将
为不同的本科生、研究生和博士后提供充足的培训机会。
项目成果
期刊论文数量(0)
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