THE ROLE OF NEUTROPHILS IN REGULATING DISEASE SEVERITY OF VIRAL SEXUALLY TRANSMITTED INFECTIONS
中性粒细胞在调节病毒性传播感染疾病严重程度中的作用
基本信息
- 批准号:9973208
- 负责人:
- 金额:$ 39.38万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2018
- 资助国家:美国
- 起止时间:2018-08-10 至 2023-07-31
- 项目状态:已结题
- 来源:
- 关键词:AddressAffectAttenuatedAutomobile DrivingBacteriaCRISPR/Cas technologyCellsClinicalDataDiseaseDisease OutcomeEpithelialEpitheliumEscherichia coliEstrogensFemaleGenital systemGrantHIVHIV-2Human Herpesvirus 2ImmuneImmune systemIn VitroInfectionInflammationInflammatoryInvadedKnock-outLeadMediatingModelingMolecularMorbidity - disease rateMucositisMucous MembraneMusNeutrophil ActivationNeutrophil InfiltrationPathogenicityPathologyPathway interactionsPattern recognition receptorPermeabilityPlayPopulationPredispositionProductionProgesteroneRecurrenceRoleSeverity of illnessSexually Transmitted DiseasesSignal TransductionSourceSymptomsSystemTestingTissuesVaginaViralVirusWomanWorkattenuationbacterial communitybasecell typechemokinecytokinedysbiosisgenital herpesglobal healthimaging approachimmunopathologyin vivoin vivo imaginginsightmicrobiotamigrationneutrophilnew therapeutic targetnovelreduce symptomsreproductive tractresponsesexually transmitted virusstem cellsvaginal microbiotavaginal mucosa
项目摘要
PROJECT SUMMARY
Herpes simplex virus-2 (HSV-2) is the major causative agent of genital herpes, an incurable sexually
transmitted infection that disproportionately infects women and poses a global health burden. Genital herpes is
associated with recurrent symptoms that lead to tissue damage in the genital tract, and this pathology has
been proposed as a mechanism for increased susceptibility to other viral sexually transmitted infections such
as human immunodeficiency virus (HIV)2,3. The cellular and molecular mechanisms that lead to inflammation
and tissue damage within the female genital tract during HSV-2 infection are poorly understood. Neutrophils
are highly destructive innate immune cells that patrol the vagina at the steady state4. The role of neutrophils
during viral sexually transmitted infections is not well defined. Our data show that neutrophils drive a
pathogenic response against HSV-2. Depletion of neutrophils prior to infection resulted in significantly
attenuated disease severity and tissue damage without affecting viral titers, suggesting that immunopathology
plays a key role in genital herpes. Neutrophils are capable of multiple effector functions, including cytokine
secretion. After neutrophil depletion, there was a profound reduction in IL-1b levels in the vagina, and the
majority of IL-1b expressing cells in the vagina after HSV-2 infection were neutrophils, suggesting that
neutrophil-mediated disease during HSV-2 infection may be driven by this pleiotropic pro-inflammatory
cytokine. A multitude of factors can activate the neutrophil response, including virus- and bacteria-derived
products. Transient perturbation of the vaginal microbiota led to an increase in neutrophil numbers in the
vaginal tissue, suggesting that vaginal bacteria may play a role in regulating neutrophil-dependent tissue
damage during genital herpes. Together, this proposal aims to dissect the mechanisms of neutrophil activation
and identify the key factors that drive neutrophil-dependent tissue damage and inflammation at the vaginal
mucosa during HSV-2 infection. The requirement of IL-1b produced by neutrophils in driving genital
inflammation will be assessed in vivo using knockout models and cytokine neutralization, and downstream
effector mechanisms that may lead to mucosal permeability will be examined. The role of the vaginal
microbiota in regulating pathogenic neutrophil responses will be tested by transient introduction of common
vaginal bacteria into mice. Finally, CRISPR/cas9 will be used to delete candidate pattern recognition receptors
in neutrophils derived from Hoxb8-transformed progenitor cells to identify pathways that can stimulate
neutrophils during genital HSV-2 infection. Greater understanding of the pathology caused by neutrophil
responses to HSV-2 infection may provide new targets for therapeutics that can reduce symptoms, tissue
damage and susceptibility to other viral sexually transmitted infections.
项目摘要
生殖器疱疹是由单纯疱疹病毒(HSV-12)引起的一种性传播疾病,是生殖器疱疹的主要病原体。
生殖器疱疹是一种常见的传染性疾病,不成比例地感染女性,并构成全球健康负担。
与导致生殖道组织损伤的复发性症状相关,这种病理学
被认为是增加对其他病毒性传播感染易感性的机制,
人类免疫缺陷病毒(HIV)2,3.导致炎症的细胞和分子机制
和组织损伤在女性生殖道内HSV-12感染的了解甚少。
是高度破坏性的先天免疫细胞,在稳态下巡逻阴道4.中性粒细胞的作用
在病毒性传播感染中,中性粒细胞的作用并不明确。我们的数据显示,
2.感染前中性粒细胞的耗竭导致了对HSV-HSV-1的致病反应。
在不影响病毒滴度的情况下减轻疾病的严重程度和组织损伤,这表明免疫病理学
在生殖器疱疹中起关键作用。中性粒细胞能够发挥多种效应功能,包括细胞因子
中性粒细胞耗竭后,阴道中IL-1b β水平显著降低,
HSV-12感染后阴道内IL-1b β 1表达细胞以中性粒细胞为主,提示HSV-12感染后,
HSV-12感染期间的中性粒细胞介导的疾病可能是由这种多效性促炎性因子驱动的
许多因子可以激活中性粒细胞反应,包括病毒和细菌来源的细胞因子。
阴道微生物群的短暂扰动导致中性粒细胞数量的增加,
阴道组织,表明阴道细菌可能在调节中性粒细胞依赖性组织中起作用,
在生殖器疱疹的损害。总之,这一建议旨在剖析中性粒细胞激活的机制,
并确定导致中性粒细胞依赖性组织损伤和阴道炎症的关键因素
中性粒细胞分泌IL-1b β在HSV-12感染的生殖道粘膜中的作用
将使用敲除模型和细胞因子中和在体内评估炎症,并且下游
将检查可能导致粘膜渗透性的效应器机制。
微生物群在调节致病性中性粒细胞反应中的作用将通过瞬时引入常见的
最后,CRISPR/cas9将用于删除候选模式识别受体。
在来自Hoxb 8-β转化祖细胞的嗜中性粒细胞中,以鉴定可以刺激
中性粒细胞在生殖器HSV-12感染中的作用。
对HSV-E2感染的反应可能为治疗提供新的靶点,
损害和其他病毒性传播感染的易感性。
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('HAINA SHIN', 18)}}的其他基金
THE ROLE OF NEUTROPHILS IN REGULATING DISEASE SEVERITY OF VIRAL SEXUALLY TRANSMITTED INFECTIONS
中性粒细胞在调节病毒性传播感染疾病严重程度中的作用
- 批准号:
10212918 - 财政年份:2018
- 资助金额:
$ 39.38万 - 项目类别:
THE ROLE OF NEUTROPHILS IN REGULATING DISEASE SEVERITY OF VIRAL SEXUALLY TRANSMITTED INFECTIONS
中性粒细胞在调节病毒性传播感染疾病严重程度中的作用
- 批准号:
9761975 - 财政年份:2018
- 资助金额:
$ 39.38万 - 项目类别:
Antigen-specific CD8 T cell migration and protective immunity in permissive and r
抗原特异性 CD8 T 细胞迁移和保护性免疫
- 批准号:
8107585 - 财政年份:2010
- 资助金额:
$ 39.38万 - 项目类别:
Antigen-specific CD8 T cell migration and protective immunity in permissive and r
抗原特异性 CD8 T 细胞迁移和保护性免疫
- 批准号:
8284215 - 财政年份:2010
- 资助金额:
$ 39.38万 - 项目类别:
Antigen-specific CD8 T cell migration and protective immunity in permissive and r
抗原特异性 CD8 T 细胞迁移和保护性免疫
- 批准号:
7993772 - 财政年份:2010
- 资助金额:
$ 39.38万 - 项目类别:
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