Mechanisms of Staphylococcus aureus-induced changes in cutaneous T cell networks
金黄色葡萄球菌引起皮肤 T 细胞网络变化的机制
基本信息
- 批准号:10611447
- 负责人:
- 金额:--
- 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:2020-04-01 至 2026-03-31
- 项目状态:未结题
- 来源:
- 关键词:Active ImmunizationAdaptive Immune SystemAntibioticsAntibodiesAntibody ResponseAntigensAntsB-LymphocytesBiologicalCD4 Positive T LymphocytesCell CountCellsCellular ImmunityCharacteristicsClinicalCommunitiesConsensusCutaneousDataDevelopmentDiseaseDisease OutbreaksDrug or chemical Tissue DistributionDrug resistanceElementsEngineeringEquipmentEventExotoxinsExposure toGenerationsGenus staphylococcusHeart ValvesHost DefenseHumoral ImmunitiesHygieneIL17 geneImmuneImmune responseImmunityImmunizeImmunocompetentImmunologic MemoryImmunologicsIndividualInfectionInfectious AgentInfectious Skin DiseasesInjuryKineticsKnock-outLifeMaintenanceMeasuresMediatingMediatorMemoryMilitary PersonnelMissionModelingMolecularMusOVA 323-339OrganismOvumPeptidesPopulationPrevalencePreventive vaccinePrimary InfectionProcessPublic HealthResearchRiskRoleScourgeSepsisSiteSkinSkin TissueSkin injurySoft Tissue InfectionsStaphylococcus aureusStaphylococcus aureus infectionSterilityStructureStructure of germinal center of lymph nodeSystemT-LymphocyteTestingTimeTissuesToxinTrainingTraumaVaccine DesignVaccinesVirulenceVirulence Factorsadaptive immune responseantimicrobialbonecell growthcostdefense responsedesigndisorder controldraining lymph nodehealingknockout genelangerinmethicillin resistant Staphylococcus aureusneutrophilpandemic diseasepathogenpreventprogramsprophylacticrecruitresistant strainresponseuptakevaccination strategy
项目摘要
Staphylococcus aureus (S. aureus) is a ubiquitous gram-positive pathogen that is one of the
most frequent causes of skin and soft tissue infections. Frequently, these infections serve as a
prelude to invasive life-threatening diseases. The prevalence of severe S. aureus infections
have increased in healthy populations, associated with the development of both drug resistance
and hypervirulence in methicillin-resistant S. aureus (MRSA) strains such USA 300. The spread
of MRSA-induced disease during training and mission assignments is a well-documented threat
to military public health. A wealth of both clinical and experimental evidence suggests that (1)
neutrophils (PMNs) are essential mediators of anti-S. aureus host defense, and (2) emerging
MRSA strains release toxins capable of killing PMNs, and consequently they can overwhelm
host defense responses and rapidly cause disease in immune competent individuals. The
rapidity of these events suggests a protective vaccine would be the best approach to disease
control. Using a model of healed MRSA skin infection that elicits protective immunity against a
second MRSA skin infection, we provide evidence that the appropriate induction of humoral and
cellular immune responses can separately but synergistically support anti-MRSA effector
responses and expedite pathogen clearance. The research plan described herein will test the
hypotheses that active immunization against S. aureus is feasible, and that protective antigens
include secreted bacterial virulence factors. The specific aims are designed to evaluate the
pathogen and host-derived factors that are required to initiate and maintain ant-MRSA
protective adaptive immune responses. In specific aim 1 we will identify antigens leading to
protective immunity by systematically measuring the prophylactic effects of skin challenge with
selected knockout strains of MRSA followed by rechallenge with WT MRSA. In aim 2, we will
characterize T follicular helper and the germinal center responses that correspond with anti-
MRSA protective immunity, and employ Langerin-DTR mice to delineate the skin DC
requirements for these processes.
In aim 3, we will characterize the
cutaneous T cell signature
corresponding with anti-MRSA protective immunity by measuring the kinetics and tissue
distribution pathogen specific T cells following infection with strains of MRSA that have been
engineered to express ova peptide OVA
323-339. After clarifying the adaptive T cell correlates of
anti-MRSA protective immunity, we will use the Langerin-DTR system to elucidate the
underlying DC requirements for their induction. Overall the program is designed to dissect the
humoral and cellular immune components required for a protective immune response to MRSA.
Once explored, these data will provide the basis to design and evaluate approaches to a
preventive vaccine.
金黄色葡萄球菌(金黄色葡萄球菌)是一种普遍存在的革兰氏阳性病原体,是其中一种
最常见的是皮肤和软组织感染的原因。
侵入性生命的疾病的前奏。
与两种耐药性的发展有关的健康普及增加了
和耐甲氧西林的金黄色葡萄球菌(MRSA)菌株中的高度投资。
MRSA引起的训练期间疾病和一些传教士是有据可查的威胁
对军事公共卫生。
中性粒细胞(PMN)是抗S的必要介体。
MRSA菌株释放能够杀死PMN的毒素,并且可以兼顾他们不知所措
宿主的防御反应并迅速导致免疫胜任的人
事件的速度表明一种保护性疫苗将是最佳疾病方法
控制使用MRSA皮肤感染的模型
第二MRSA皮肤感染,我们提供了适当诱导体液和的证据
细胞IMUNE响应分别但协同支持抗MRSA效应器
反应和快速的病原体清除。
主动免疫对金黄色葡萄球菌的假设是可行的,并且保护性抗原
包括分泌的病毒因素。
病原体和宿主衍生的因素启动和维持ANT-MRSA所需的因素
保护性免疫反应。
通过系统地测量皮肤挑战的预防作用来保护性免疫
选定的MRSA淘汰赛菌株,然后是wth wth wth wth wth wth wth wth 2,我们将
表征叶状辅助者和与抗 - 的生发中心反应
MRSA保护剂免疫,并使用langerin-DTR小鼠来描绘皮肤DC
该过程的要求。
在AIM 3中,我们将描述您
皮肤T细胞签名
通过测量动力学和Tisue,与抗MRSA保护免疫相对应
分布病原体特异性t细胞感染后MRSA菌株已
设计用于表达OVA肽OVA
323-339。
抗MRSA保护性免疫,我们将使用langerin-DTR系统来阐明您
指示的基础直流要求。
对MRSA的保护性免疫反应所需的体液和细胞免疫成分。
一旦探索,这些数据将为设计和评估A的方法提供
预防性疫苗。
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('Corey Parlet', 18)}}的其他基金
Mechanisms of Staphylococcus aureus-induced changes in cutaneous T cell networks
金黄色葡萄球菌引起皮肤 T 细胞网络变化的机制
- 批准号:
10454228 - 财政年份:2020
- 资助金额:
-- - 项目类别:
Mechanisms of Staphylococcus aureus-induced changes in cutaneous T cell networks
金黄色葡萄球菌引起皮肤 T 细胞网络变化的机制
- 批准号:
10293524 - 财政年份:2020
- 资助金额:
-- - 项目类别:
Mechanisms of Staphylococcus aureus-induced changes in cutaneous T cell networks
金黄色葡萄球菌引起皮肤 T 细胞网络变化的机制
- 批准号:
9663585 - 财政年份:2020
- 资助金额:
-- - 项目类别:
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