Virus-host interactions regulating innate signaling for human cytomegalovirus latency
病毒-宿主相互作用调节人类巨细胞病毒潜伏期的先天信号
基本信息
- 批准号:10565926
- 负责人:
- 金额:$ 37.68万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2022
- 资助国家:美国
- 起止时间:2022-02-07 至 2027-01-31
- 项目状态:未结题
- 来源:
- 关键词:AddressAmino AcidsBiologyCD34 geneCellsCercopithecine Herpesvirus 1ComplexComplicationCytomegalovirusCytomegalovirus InfectionsDNA DamageDNA biosynthesisDataDefective VirusesDependenceDiagnosticDiseaseEndothelial CellsEpidermal Growth Factor ReceptorGenesGenomeGoalsGrowthHematopoieticHematopoietic Stem Cell TransplantationHematopoietic stem cellsHumanImmuneImmunoprecipitationIn VitroIndividualInfectionIntegration Host FactorsInterferonsLifeMEKsMaintenanceMapsMass Spectrum AnalysisMediatingMolecularMorbidity - disease rateOrganPI3K/AKTPathway interactionsPositioning AttributeProteinsProto-Oncogene Proteins c-aktRegulationReportingResearchRoleSTAT1 geneSignal TransductionSolidStem cell transplantStimulusSwitching ComplexTherapeuticTranscriptUndifferentiatedViralViral GenesVirusVirus LatencyVirus ReplicationWD RepeatWorkattenuationcell typecofactorcollaborative approachhumanized mousein vitro Modelin vivoin vivo Modelinsightknock-downlatent infectionmortalitymouse modelmutantnovelnovel virusorgan transplant recipientpreventprogramsprotein transportreactivation from latencyrecombinant virusresponsescaffoldstem cellstraffickingtranscription factorubiquitin-specific proteaseviral DNAvirus host interaction
项目摘要
PROJECT SUMMARY
The goal of our research program is to elucidate molecular mechanisms by which HCMV regulates host
signaling in CD34+ hematopoietic progenitor cells (HPCs) for the establishment and maintenance of viral
latency and reactivation from latency. HCMV remains a significant cause of morbidity and mortality after solid
organ and hematopoietic stem cell transplantation despite advances in diagnostics and therapeutics. HCMV
latency is complex and the signaling mechanisms regulating the establishment and maintenance of HCMV
latency, as well as for reactivation of HCMV, are poorly understood. We have identified a locus of viral genes in
the ULb’ region of the genome that coordinates the expression of four genes, UL133, UL135, UL136, and
UL138, from polycistronic transcripts. Using state-of-the art in vitro models in human CD34+ HPCs and in vivo
models in humanized mice, we will define virus-host interactions modulating host signaling for the
establishment of latency. Our preliminary data show that the latency determinant, UL138, interacts with host
WD Repeat containing protein 48 (WDR48), which serves as a scaffold to activate ubiquitin specific protease,
USP1, USP12, and USP46. WDR48-USP1 complexes regulate STAT1 and AKT signaling and we demonstrate
that UL138 directs the activity of WDR48-USP1 to induce the activation of STAT1. We further show that USP1
activity it important for the establishment of a latent infection, such that when USP1 is inhibited, the virus
replicates in the absence of a replication stimulus. We hypothesize that UL138 interaction directs WDR48-USP
complexes to regulate innate signaling to suppress virus replication to prevent reactivation. In Aim 1, we will
determine how UL138 impacts WDR48/USP complexes and function. We will map the amino acids in UL138
that are required for interaction with WDR48/USP complexes and generate recombinant viruses defective for
these interactions. We will distinguish roles of the UL138-WDR48/USP1 interactions from that of UL138-EGFR
interactions. Further, we have shown that UL138 sustains AKT signaling, at least in part through an interaction
with EGFR, but interaction with USP12 and USP46 may provide additional avenues to the regulation of AKT.
Aim 2 will determine how UL138-WDR48/USP interactions impact latency and reactivation and the role of
UL138 in activating STAT1 and AKT using recombinant viruses and knockdown of host factors. This project
will provide the comprehensive and mechanistic insights into the multi-faceted regulation of host signaling for
the control of HCMV latency. The network of viral and host factors we have identified uniquely position us to
define novel host and viral targets for antiviral strategies to control HCMV latency or reactivation.
项目摘要
我们的研究计划的目的是阐明HCMV调节宿主的分子机制
CD34+造血祖细胞(HPC)中的信号传导,以建立和维持病毒
潜伏期和延迟重新激活。 HCMV仍然是固体后发病率和死亡率的重要原因
器官和造血干细胞移植目的地诊断和治疗的进步。 HCMV
潜伏期很复杂,并且信号机制可以预期建立和维护HCMV
延迟以及HCMV的重新激活,知之甚少。我们已经确定了病毒基因的基因座
基因组的ULB区域,该区域协调了四个基因的表达,UL133,UL135,UL136和
UL138,来自多元转录本。在人CD34+ HPC和体内使用最新的体外模型
人性化小鼠中的模型,我们将定义病毒宿主相互作用调节宿主信号的信号
建立潜伏期。我们的初步数据表明,延迟确定器UL138与主机交互
WD重复含有蛋白48(WDR48),作为激活泛素特异性蛋白的支架,
USP1,USP12和USP46。 WDR48-USP1复合物调节STAT1和AKT信号,我们证明了
UL138指示WDR48-USP1的活性诱导STAT1的激活。我们进一步表明USP1
活动对于建立潜在感染很重要,因此当抑制USP1时,病毒
在没有复制刺激的情况下复制。我们假设UL138相互作用指导WDR48-USP
复合物调节先天信号以抑制病毒复制以防止重新激活。在AIM 1中,我们将
确定UL138如何影响WDR48/USP复合物和功能。我们将在UL138中绘制氨基酸
与WDR48/USP复合物相互作用并生成重组病毒缺陷所必需的
这些相互作用。我们将区分UL138-WDR48/USP1相互作用的角色与UL138-EGFR
互动。此外,我们已经证明UL138自杀Akt信号至少部分通过相互作用
使用EGFR,但是与USP12和USP46的相互作用可能会为AKT的调节提供其他途径。
AIM 2将确定UL138-WDR48/USP相互作用如何影响潜伏期和重新激活以及
UL138使用重组病毒激活STAT1和AKT并敲低宿主因子。这个项目
将为主机信号的多方面调节提供全面和机械的见解
HCMV延迟的控制。我们已经确定的病毒和宿主因素网络将我们定位为
定义新的宿主和病毒靶标,以控制HCMV潜伏期或重新激活的抗病毒策略。
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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Felicia D Goodrum其他文献
Felicia D Goodrum的其他文献
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{{ truncateString('Felicia D Goodrum', 18)}}的其他基金
Virus-host interactions regulating innate signaling for human cytomegalovirus latency
病毒-宿主相互作用调节人类巨细胞病毒潜伏期的先天信号
- 批准号:
10464446 - 财政年份:2022
- 资助金额:
$ 37.68万 - 项目类别:
Infection and Inflammation as Drivers of Aging (IIDA) Predoctoral Training Program
感染和炎症作为衰老驱动因素 (IIDA) 博士前培训计划
- 批准号:
10179263 - 财政年份:2019
- 资助金额:
$ 37.68万 - 项目类别:
Infection and Inflammation as Drivers of Aging (IIDA) Predoctoral Training Program
感染和炎症作为衰老驱动因素 (IIDA) 博士前培训计划
- 批准号:
10412063 - 财政年份:2019
- 资助金额:
$ 37.68万 - 项目类别:
Mechanisms of Human Cytomegalovirus Latency in Primary Human Hematopoietic Cells
人原代造血细胞中人巨细胞病毒潜伏期的机制
- 批准号:
10542647 - 财政年份:2019
- 资助金额:
$ 37.68万 - 项目类别:
Mechanisms of Human Cytomegalovirus Latency in Primary Human Hematopoietic Cells
人原代造血细胞中人巨细胞病毒潜伏期的机制
- 批准号:
10475998 - 财政年份:2019
- 资助金额:
$ 37.68万 - 项目类别:
Mechanisms of Human Cytomegalovirus Latency in Primary Human Hematopoietic Cells
人原代造血细胞中人巨细胞病毒潜伏期的机制
- 批准号:
10020896 - 财政年份:2019
- 资助金额:
$ 37.68万 - 项目类别:
Mechanisms of Human Cytomegalovirus Latency in Primary Human Hematopoietic Cells
人原代造血细胞中人巨细胞病毒潜伏期的机制
- 批准号:
9916085 - 财政年份:2019
- 资助金额:
$ 37.68万 - 项目类别:
Mechanisms of Human Cytomegalovirus Latency in Primary Human Hematopoietic Cells
人原代造血细胞中人巨细胞病毒潜伏期的机制
- 批准号:
10689217 - 财政年份:2019
- 资助金额:
$ 37.68万 - 项目类别:
Infection and Inflammation as Drivers of Aging (IIDA) Predoctoral Training Program
感染和炎症作为衰老驱动因素 (IIDA) 博士前培训计划
- 批准号:
10640924 - 财政年份:2019
- 资助金额:
$ 37.68万 - 项目类别:
Mechanisms of Human Cytomegalovirus Latency in Primary Human Hematopoietic Cells
人原代造血细胞中人巨细胞病毒潜伏期的机制
- 批准号:
10229506 - 财政年份:2019
- 资助金额:
$ 37.68万 - 项目类别:
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