Defining the role of post-translational regulation by extracellular proteases in the pathogenesis of Staphylococcus aureus osteomyelitis
确定细胞外蛋白酶翻译后调节在金黄色葡萄球菌骨髓炎发病机制中的作用
基本信息
- 批准号:10493318
- 负责人:
- 金额:$ 45.2万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2015
- 资助国家:美国
- 起止时间:2015-06-15 至 2026-08-31
- 项目状态:未结题
- 来源:
- 关键词:AddressAmputationAnimal ModelAntibiotic TherapyBeliefBone Remodelling PathwayBone remodelingClinicalDebridementExhibitsFoundationsGenesGenus staphylococcusGoalsHost DefenseHumanImmune responseIn VitroIndividualInfectionInflammatory ResponseLaboratoriesMammalian CellMediatingMethicillinMethicillin ResistanceMicrobial BiofilmsModelingMutationNutrientOperative Surgical ProceduresOsteoblastsOsteoclastsOsteomyelitisPathogenesisPeptide HydrolasesPhenotypePlayPost-Translational RegulationProductionProteinsProteomeProteomicsReportingResistanceRoleSepsisStaphylococcus aureusStaphylococcus aureus infectionSurfaceTherapeuticTimeTissuesVirulenceVirulence Factorsbaseboneclinically relevantcytotoxicityexperimental studyextracellularin vivomutantnovelnovel therapeutic interventionpathogenic bacteriaprophylactic
项目摘要
SUMMARY ABSTRACT
We have demonstrated that mutation of the staphylococcal accessory regulatory (sarA) in Staphylococcus
aureus results in an increase in the production of extracellular proteases to a degree that limits biofilm
formation, limits cytotoxicity for mammalian cells including osteoblasts and osteoclasts, and limits the
accumulation of both surface-associated and extracellular virulence factors. We have also demonstrated that
this can be correlated with decreased virulence in animal models of sepsis and osteomyelitis. Moreover, we
have confirmed that all of these phenotypes are evident in diverse clinical isolates of S. aureus and that they
can be reversed by eliminating the ability of sarA mutants to produce extracellular proteases. In this proposal,
we will expand on these observations to identify the specific extracellular proteases that are most relevant in
the context of our underlying scientific hypothesis in diverse clinical isolates of S. aureus (Aim 1) and use the
information gained to interrogate the impact of these proteases on the virulence factor repertoire on these
clinical isolates, define the impact sarA and these proteases on bone remodeling and the host response in
bone infection, and ultimately identify and evaluate the contribution of specific S. aureus virulence factors alone
and in combination with each other on these phenotypes (Aim 2).
摘要
我们已经证明,葡萄球菌中葡萄球菌辅助调节基因(sarA)突变
金黄色葡萄球菌导致胞外蛋白酶的产生增加到限制生物膜的程度
形成,限制了对哺乳动物细胞包括成骨细胞和破骨细胞的细胞毒性,并限制了细胞毒性。
表面相关和细胞外毒力因子的积累。我们还证明,
这可能与脓毒症和骨髓炎动物模型中的毒力降低有关。而且我们
已经证实,所有这些表型在不同的临床分离的沙门氏菌中是明显的。金黄色葡萄球菌,
可以通过消除sarA突变体产生胞外蛋白酶的能力来逆转。在这项提案中,
我们将在这些观察的基础上进行扩展,以确定与细胞外蛋白酶最相关的特异性细胞外蛋白酶。
我们在不同临床分离的S.金黄色葡萄球菌(目标1),并使用
获得的信息来询问这些蛋白酶对这些病毒的毒力因子库的影响,
临床分离物,定义sarA和这些蛋白酶对骨重建的影响以及在
骨感染,并最终确定和评估的贡献,具体的S。单独的金黄色葡萄球菌毒力因子
并相互结合对这些表型的影响(目的2)。
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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MARK S SMELTZER其他文献
MARK S SMELTZER的其他文献
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{{ truncateString('MARK S SMELTZER', 18)}}的其他基金
Core A: Administrative and Scientific Development Core
核心A:行政和科学发展核心
- 批准号:
10618373 - 财政年份:2022
- 资助金额:
$ 45.2万 - 项目类别:
Center for Microbial Pathogenesis and Host Inflammatory Responses
微生物发病机制和宿主炎症反应中心
- 批准号:
10412838 - 财政年份:2022
- 资助金额:
$ 45.2万 - 项目类别:
Core A: Administrative and Scientific Development Core
核心A:行政和科学发展核心
- 批准号:
10412839 - 财政年份:2022
- 资助金额:
$ 45.2万 - 项目类别:
Center for Microbial Pathogenesis and Host Inflammatory Responses
微生物发病机制和宿主炎症反应中心
- 批准号:
10618372 - 财政年份:2022
- 资助金额:
$ 45.2万 - 项目类别:
Impact of Staphylococcus aureus in osteomyelitis and bone physiology
金黄色葡萄球菌对骨髓炎和骨生理学的影响
- 批准号:
9271859 - 财政年份:2015
- 资助金额:
$ 45.2万 - 项目类别:
Defining the role of post-translational regulation by extracellular proteases in the pathogenesis of Staphylococcus aureus osteomyelitis
确定细胞外蛋白酶翻译后调节在金黄色葡萄球菌骨髓炎发病机制中的作用
- 批准号:
10379698 - 财政年份:2015
- 资助金额:
$ 45.2万 - 项目类别:
Impact of Staphylococcus aureus in osteomyelitis and bone physiology
金黄色葡萄球菌对骨髓炎和骨生理学的影响
- 批准号:
8951509 - 财政年份:2015
- 资助金额:
$ 45.2万 - 项目类别:
Impact of Staphylococcus aureus in osteomyelitis and bone physiology
金黄色葡萄球菌对骨髓炎和骨生理学的影响
- 批准号:
9089872 - 财政年份:2015
- 资助金额:
$ 45.2万 - 项目类别:
Defining the role of post-translational regulation by extracellular proteases in the pathogenesis of Staphylococcus aureus osteomyelitis
确定细胞外蛋白酶翻译后调节在金黄色葡萄球菌骨髓炎发病机制中的作用
- 批准号:
10675639 - 财政年份:2015
- 资助金额:
$ 45.2万 - 项目类别:
Shared Resource to Investigate Cellular Metabolism
研究细胞代谢的共享资源
- 批准号:
10399842 - 财政年份:2012
- 资助金额:
$ 45.2万 - 项目类别:
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