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:9761975
- 负责人:
- 金额:$ 39.26万
- 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 OutcomeEpithelialEscherichia coliEstrogensFemaleGenital systemGrantHIVHIV-2Human Herpesvirus 2ImmuneImmune systemIn VitroInfectionInflammationInflammatoryInvadedKnock-outLeadMediatingModelingMolecularMorbidity - disease rateMucositisMucous MembraneMusNeutrophil ActivationNeutrophil InfiltrationPathogenicityPathologyPathway interactionsPattern recognition receptorPermeabilityPlayPopulationPredispositionProductionProgesteroneRecurrenceRoleSeverity of illnessSexually Transmitted DiseasesSignal TransductionSourceStem cellsSymptomsSystemTestingTissuesVaginaViralVirusWomanWorkattenuationbacterial communitybasecell typechemokinecytokinedysbiosisgenital herpesglobal healthimaging approachimmunopathologyin vivoin vivo imaginginsightmicrobiotamigrationneutrophilnew therapeutic targetnovelreduce symptomsreproductive tractresponsesexually transmitted virusvaginal 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.
项目总结:
单纯疱疹病毒2型(HSV-2)是生殖器疱疹的主要致病因素,是一种不可治愈的性传播疾病。
生殖器疱疹是一种传染性疾病,它不成比例地感染女性,并构成全球卫生系统的负担。
与反复出现的生殖系统症状有关,这些症状可能会导致生殖道组织的损害,这是一种新的病理机制。
有人提议将其作为一种有效的机制,以防止儿童增加对其他病毒和性传播疾病的易感性,从而防止此类感染。
作为一种人类免疫缺陷病毒(HIV)2,3.主要的细胞免疫和分子生物学机制可能导致炎症。
而在HSV-2感染过程中,女性生殖道内的组织损伤也鲜为人知。
它们是极具破坏性的天然免疫细胞,它们在最稳定的状态下巡视阴道。这是中性粒细胞的主要作用。
在病毒感染和性传播期间,感染的定义并不明确。但我们的最新数据显示,中性粒细胞可能会导致感染。
对HSV-2的致病免疫反应。感染前中性粒细胞的耗尽导致了显著的死亡。
在不影响病毒滴度的情况下,减轻了疾病的严重程度,减轻了组织损伤,这表明免疫病理改变了病毒滴度。
在生殖器疱疹中起着非常关键的作用。中性粒细胞可能具有多种效应细胞功能,包括细胞因子。
分泌。在中性粒细胞耗尽后,阴道、卵巢和卵巢中的IL-1b水平显著下降。
感染HSV-2后,表达IL-1b的中的大多数是中性粒细胞,这表明这是可能的。
在HSV-2感染过程中,中性粒细胞介导的疾病的发生可能不是由这种多效性和促炎性疾病引起的。
细胞因子。大量的细胞因子可以激活中性粒细胞的免疫反应,包括病毒和细菌衍生的病毒。
产品。由于阴道和微生物区系的短暂扰动,导致中性粒细胞和中性粒细胞的数量在一周内显著增加。
这表明,阴道细菌可能在调节中性粒细胞依赖的阴道组织中发挥重要作用。
生殖器疱疹期间的损害。我们共同提出这项新的提案,旨在进一步剖析中性粒细胞激活的主要机制。
并找出可能导致中性粒细胞依赖的组织损伤和阴道周围炎症的三个关键致病因素。
在HSV-2感染期间粘膜受损。IL-1b的主要要求是由嗜中性粒细胞在驱动生殖器官过程中产生的。
炎症反应也将在体内通过使用基因敲除模型进行评估,并使用细胞因子进行中和、抑制和下游反应。
可能导致粘膜通透性下降的效应和机制将被进一步研究。更详细地说,它的主要作用是促进阴道。
微生物群在调节致病性中性粒细胞免疫反应中的作用将通过一种常见的暂时性基因的引入来进行测试。
阴道细菌进入小鼠体内。最后,CRISPR/Cas9基因将被用来进一步删除候选模式识别受体。
在中性粒细胞中,从Hoxb8转化的中性粒细胞中分离出来的祖细胞被用来进一步确定它可以有效刺激的途径。
中性粒细胞在生殖器和HSV-2感染期间产生。更好地了解由中性粒细胞感染引起的新的病理改变。
对HSV-2病毒感染的反应可能会为新的治疗方法提供新的靶点,这些药物可以有效地减轻症状和组织。
对其他病毒和性传播疾病的损害和易感性更高。
项目成果
期刊论文数量(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:
$ 39.26万 - 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:
9973208 - 财政年份:2018
- 资助金额:
$ 39.26万 - 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:
$ 39.26万 - 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:
$ 39.26万 - 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:
$ 39.26万 - 项目类别:
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