Mechanisms of Staphylococcus aureus-induced changes in cutaneous T cell networks
Mechanisms of Staphylococcus aureus-induced changes in cutaneous T cell networks
批准号:
10293524
负责人:
Corey Parlet
金额:
$0.0万
依托单位国家:
美国
项目类别:
财政年份:
2020
资助国家:
美国
项目状态:
未结题
起止时间:
2020-04-01 至 2025-03-31
关键词:
Active ImmunizationAdaptive Immune SystemAntibioticsAntibodiesAntibody ResponseAntigensAntsB-LymphocytesBiologicalCD4 Positive T LymphocytesCell CountCellsCellular ImmunityCharacteristicsClinicalCommunitiesConsensusCutaneousDataDevelopmentDiseaseDisease OutbreaksDrug or chemical Tissue DistributionDrug resistanceElementsEngineeringEquipmentEventEvolutionExotoxinsExposure toGenerationsGenus staphylococcusHeart ValvesHost DefenseHumoral ImmunitiesHygieneImmuneImmune responseImmunityImmunizeImmunocompetentImmunologic MemoryImmunologicsIndividualInfectionInfectious AgentInfectious Skin DiseasesInjuryInterleukin-17KineticsKnock-outLifeMaintenanceMeasuresMediatingMediator of activation proteinMemoryMilitary PersonnelMissionModelingMolecularMusOVA 323-339OrganismOvumPeptidesPopulationPrevalencePreventive vaccinePrimary InfectionProcessPublic HealthResearchRiskRoleScourgeSepsisSiteSkinSkin TissueSkin injurySoft Tissue InfectionsStaphylococcus aureusStaphylococcus aureus infectionSterilityStructureStructure of germinal center of lymph nodeSystemT-LymphocyteTestingTimeToxinTrainingTraumaVaccine DesignVaccinesVirulenceVirulence Factorsadaptive immune responseantimicrobialbasebonecostdefense responsedesigndisorder controldraining lymph nodehealingknockout genelangerinmethicillin resistant Staphylococcus aureusneutrophilpandemic diseasepathogenpreventprogramsprophylacticrecruitresistant strainresponseuptake
中文摘要
金黄色葡萄球菌(S.aureus)是一种普遍存在的革兰氏阳性细菌,是世界上最常见的革兰氏阳性细菌之一。
最常见的疾病是皮肤感染和软组织感染。通常情况下,这些感染会成为一种疾病。
这是侵袭性和危及生命的疾病的前奏,也是严重金黄色葡萄球菌感染的最高流行率。
他们增加了健康人群中的耐药性,这与两种药物耐药性的进一步发展有关。
在耐甲氧西林金黄色葡萄球菌(MRSA)菌株中发现了超强毒力,例如美国的300株。随着病毒的传播。
在培训课程和任务分配过程中,MRSA引发的疾病威胁是一个有据可查的威胁。
为了促进军事和公共卫生。一项丰富的临床研究和实验研究的证据表明:(1)
中性粒细胞(PMN)是抗金黄色葡萄球菌的基本介体,是新出现的抗金黄色葡萄球菌的防御、防御和免疫(2)。
MRSA的菌株会释放能够杀死中性粒细胞的毒素,从而无法压倒它们。
东道主的防御反应迅速,并在有免疫力和有能力的个人中引起疾病。
这些事件的快速发展表明,一种新的保护性疫苗可能不是治疗这种疾病的最好方法。
对照。正在使用一种治愈的金黄色葡萄球菌的模型,即皮肤和感染,这可能会引起对金黄色葡萄球菌的保护性免疫应答。
其次,对于皮肤和皮肤感染的MRSA,我们可以提供更多的证据,证明体液免疫和体液免疫的适当诱导作用。
细胞免疫应答可以单独进行,但可以协同支持抗MRSA抗体效应器。
应对措施将加快病原体的清除。根据本文所述的最新研究计划,将不会对该计划进行测试。
假说认为,针对金黄色葡萄球菌的主动免疫接种是完全可行的,因为它提供了保护性的免疫抗原。
包括秘密的细菌和毒力等因素。这些具体的目标也是为了更好地评估这些因素而设计的。
病原菌和宿主衍生的抗菌素是启动和维持抗菌素-MRSA所必需的。
保护性和适应性免疫反应。在一个具体的目标1中,我们将不识别导致疾病的主要抗原。
保护性免疫是通过系统地测量皮肤的预防和免疫效果来实现的。
选定的MRSA菌株被击倒后,我们将与WT和MRSA进行重新挑战。在目标2中,我们将继续。
描述毛囊和毛发中心的反应特征,这些反应可能与抗癌药物相对应
耐甲氧西林金黄色葡萄球菌具有保护性免疫功能,他们使用朗格林-DTR小鼠模型来描绘DC的主要皮肤。
对这些新流程的要求也很高。
在《目标3》中,我们将更好地描述
经皮肤移植的T淋巴细胞签名:
与抗MRSA抗体相对应的是通过检测血液动力学参数和组织免疫功能来保护机体免疫功能。
在感染了尚未发现的耐甲氧西林金黄色葡萄球菌菌株后,病原体和特异性T淋巴细胞的分布。
利用基因工程技术表达卵子蛋白多肽
323--339。在澄清了主要的自适应T细胞的作用后,
--
抗MRSA是一种保护性免疫,我们现在不会使用朗格林-DTR免疫系统来进一步澄清这一问题。
基础数据中心的要求是为了更好地引导他们。总体来说,这一计划的设计初衷是为了更好地剖析问题。
体液免疫和细胞免疫是对MRSA产生保护性免疫应答所必需的。
一旦进行了探索,这些数据将为设计方案提供更好的依据,并为评估方案提供更好的方法。
预防性疫苗。
英文摘要
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.
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Mechanisms of Staphylococcus aureus-induced changes in cutaneous T cell networks
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批准号:10454228
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项目类别:
-
资助金额:$0.0万
-
财政年份:2020
-
负责人:Corey Parlet
-
依托单位:
Mechanisms of Staphylococcus aureus-induced changes in cutaneous T cell networks
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批准号:10611447
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项目类别:
-
资助金额:$0.0万
-
财政年份:2020
-
负责人:Corey Parlet
-
依托单位:
Mechanisms of Staphylococcus aureus-induced changes in cutaneous T cell networks
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批准号:9663585
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项目类别:
-
资助金额:$0.0万
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财政年份:2020
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负责人:Corey Parlet
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依托单位:
海外基金