Role of insulin-like growth factor binding proteins in the pathogenesis of herpes stromal keratitis.
胰岛素样生长因子结合蛋白在疱疹基质角膜炎发病机制中的作用。
基本信息
- 批准号:10056782
- 负责人:
- 金额:$ 37.74万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2020
- 资助国家:美国
- 起止时间:2020-08-01 至 2025-07-31
- 项目状态:未结题
- 来源:
- 关键词:AblationAdrenal Cortex HormonesAntiviral AgentsBiological AssayBiological AvailabilityBlindnessBlocking AntibodiesBlood CirculationBlood VesselsCataractCell AgingCell surfaceChronicClinicalConfocal MicroscopyCorneaCorneal StromaCorneal edemaDevelopmentDiseaseEnzyme-Linked Immunosorbent AssayEpithelial CellsEventEye InfectionsGlaucomaGoalsHerpesvirus 1HumanHypoxiaImmunomodulatorsImpaired wound healingInfectionInflammationInflammatoryInsulin-Like Growth Factor Binding Protein 3Insulin-Like Growth Factor IInsulin-Like Growth Factor IIInsulin-Like Growth-Factor-Binding ProteinsInsulin-Like-Growth Factor I ReceptorKeratitisKnock-outKnockout MiceKnowledgeLesionLeukocytesMeasuresMembraneMolecularMusMyelogenousMyeloid CellsOralOutcomeOutcome MeasurePathogenesisPhosphorylationPhysiologic Intraocular PressurePlasmidsPredispositionProtein ArrayProteinsPublishingReceptor SignalingRecombinant Insulin-Like Growth FactorRecurrenceReportingRiskRoleSamplingSeveritiesSomatomedinsStainsSteroidsTamoxifenTestingTimeTopical applicationTyrosine Kinase InhibitorTyrosine PhosphorylationUnited StatesVascular Endothelial CellViralViral Load resultVirus ReplicationVisualangiogenesisbaseconditional knockoutcorneal epitheliumdensityexperimental studyimmunopathologyin vivomouse modelneovascularizationneutrophilnew therapeutic targetnovel therapeutic interventionpleiotropismresponsesenescence
项目摘要
Herpes stromal keratitis (HSK) is a chronic inflammatory condition that develops in response to a recurrent
corneal infection with herpes simplex virus-1 (HSV-1). HSK is the leading cause of infection-induced corneal
blindness in the United States. Clinical manifestation of HSK involves the development of opacity and
neovascularization into the avascular cornea. Newly formed leaky blood vessels in the corneal stroma obscure
the visual axis, traffic the leukocytes (mostly neutrophils) into the inflamed cornea, and cause the corneal edema.
The current mainstay of HSK treatment requires the long-term use of oral antiviral drugs and the topical
application of steroids. The prolonged use of topical steroids causes a predisposition to herpetic reactivation,
cataract development, and increased intraocular pressure (IOP), which may cause the development of
glaucoma. A better understanding of cellular and molecular events involved in the pathogenesis of HSK could
provide novel therapeutic targets to reduce the severity of HSK. The focus of this application is to understand
the mechanisms by which Insulin-like growth factor binding protein-3 (IGFBP-3) regulates the pathogenesis of
HSK. IGFBP-3 exerts its effect through insulin-like growth factor (IGF)-independent and-dependent mechanisms.
In an IGF-independent manner, IGFBP-3 is known to induce cellular senescence. The cellular senescence is
reported to inhibit viral replication. The IGF-dependent activity of IGFBP-3 involves sequestration of IGF-1 and
IGF-2 molecules and limiting their bioavailability to IGF-1R, and thereby regulates IGF-1R signaling. Our
preliminary results showed an elevated expression of IGFBP-3 in HSV-1 infected corneas of B6 mice, whereas
a significantly reduced amount of IGFBP-3 protein was detected in the circulation of infected B6 mice when
compared to uninfected B6 mice. The infected corneas of IGFBP-3 knockout (IGFBP-3 KO) mice showed an
increased viral load. Besides, increased phosphorylation of IGF-1R, the first step in IGF-1R signaling, was
determined in leukocytes infiltrating the HSK developing corneas of IGFBP-3 KO than B6 mice. A significant
increase in hemangiogenesis and opacity was measured in infected corneas of IGFBP-3 KO than B6 mice.
Together, these results led us to hypothesize that IGFBP-3 enhances viral clearance, reduces angiogenesis,
and decreases the survival and effector function of myeloid cells in HSK developing corneas. Therefore,
enhancing the IGFBP-3 protein level in HSV-1 infected cornea should alleviate the severity of HSK. Three aims
are proposed to test our hypothesis. Aim I will test the hypothesis that hypoxia enhances IGFBP-3 expression
in corneal epithelial cells, and an increased level of IGFBP-3 induces senescence in epithelial cells, and cellular
senescence promotes HSV-1 clearance from the infected cornea. Aim II will test the hypothesis that IGF-1R
signaling in myeloid and vascular endothelial cells control the severity of HSK. Aim III will test the hypothesis
that increasing IGFBP-3 protein in HSV-1 infected cornea alleviates the severity of HSK.
单纯疱疹病毒性角膜炎(HSK)是一种慢性炎症性疾病,其发生是为了应对反复发作的疾病。
角膜感染与单纯疱疹病毒1型(HSV-1)有关。单纯疱疹病毒是导致角膜感染的主要原因之一。
失明在美国普遍存在,HSK的临床表现涉及青光眼和青光眼的严重发展。
新生血管进入角膜周围,新生血管渗入角膜基质,新生血管渗漏,隐约可见。
视觉中轴和交通量使白细胞(主要是中性粒细胞)进入炎症的角膜,从而导致角膜水肿。
目前HSK治疗的主要药物是口服抗病毒药物和非外用药物的长期持续使用。
类固醇的应用。如果延长局部类固醇的使用时间,会导致疱疹病毒重新激活的易感性。
白内障的发生、发展和眼压升高,可能会导致白内障的严重发展。
青光眼。A对参与HSK的主要发病机制的细胞因子和分子生物学事件有更好的了解。
提供新的治疗靶点,以进一步降低HSK的严重程度。这一应用的重点是我们无法理解的。
其主要机制是通过胰岛素样生长因子结合蛋白-3(IGFBP-3)调节糖尿病的发病机制。
HSK.1IGFBP-3通过胰岛素样生长因子受体(IGF)-独立和依赖的调节机制发挥其治疗作用。
在一种不依赖IGF的方式下,IGFBP-3被认为可以诱导细胞衰老。而最重要的细胞衰老机制是。
据报道,它可以抑制病毒的复制。IGFBP-3的IGF依赖的酶活性包括IGF-1和IGFBP-1的自动封存。
IGF-ü2分子将它们的生物利用度限制在IGF-1R,从而调节IGF-1R的信号转导。
初步研究结果显示,在感染HSV-1的B6小鼠角膜组织中,IGFBP-3基因的表达水平明显升高,而
在感染了B6病毒的小鼠的血液循环中,检测到IGFBP-3蛋白的数量显著减少。
与未感染的B6小鼠相比,感染了IGFBP-3基因敲除的小鼠的角膜表现出了更强的敏感性。
病毒载量增加。此外,还增加了IGF-1R的磷酸化水平,这是IGF-1R信号转导的第一步。
与B6小鼠相比,IGFBP-3和KO小鼠在白细胞中的检测结果显示,单纯疱疹病毒感染和角膜发育不良的情况有显著差异。
在感染IGFBP-3和KO的小鼠中,也测量到血管生成能力和混浊程度的增加。
综上所述,这些研究结果导致我们提出假设,即IGFBP-3可以增强病毒的清除,从而减少血管生成。
而且随着角膜的发育,单纯疱疹病毒感染者的髓系干细胞的存活率和效应器功能也会降低。
在感染HSV-1的角膜组织中,提高IGFBP-3蛋白水平应该不会缓解HSK的严重程度。这三个目标。
我们提出这些建议是为了测试我们的假设。我的目的是测试我们的假设,即低氧会增强IGFBP-3的表达。
在角膜上皮细胞中,胰岛素样生长因子结合蛋白-3的表达水平增加,可诱导角膜上皮细胞、角膜上皮细胞和角膜上皮细胞衰老。
衰老可以促进HSV-1R从感染的角膜中清除。AIM II将进一步测试IGF-1R的假说。
髓系细胞和血管内皮细胞的信号传导控制了HSK的严重程度。Aim III将进一步检验这一假说。
这就是在感染HSV-1的角膜中增加IGFBP-3蛋白的含量,从而缓解了HSK的严重程度。
项目成果
期刊论文数量(0)
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Susmit Suvas的其他文献
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{{ truncateString('Susmit Suvas', 18)}}的其他基金
CXCR4: A potential therapeutic target in HSK
CXCR4:HSK 的潜在治疗靶点
- 批准号:
10752865 - 财政年份:2023
- 资助金额:
$ 37.74万 - 项目类别:
Role of insulin-like growth factor binding proteins in the pathogenesis of herpes stromal keratitis.
胰岛素样生长因子结合蛋白在疱疹基质角膜炎发病机制中的作用。
- 批准号:
10468069 - 财政年份:2020
- 资助金额:
$ 37.74万 - 项目类别:
Role of insulin-like growth factor binding proteins in the pathogenesis of herpes stromal keratitis.
胰岛素样生长因子结合蛋白在疱疹基质角膜炎发病机制中的作用。
- 批准号:
10219263 - 财政年份:2020
- 资助金额:
$ 37.74万 - 项目类别:
Role of insulin-like growth factor binding proteins in the pathogenesis of herpes stromal keratitis.
胰岛素样生长因子结合蛋白在疱疹基质角膜炎发病机制中的作用。
- 批准号:
10673185 - 财政年份:2020
- 资助金额:
$ 37.74万 - 项目类别:
Interplay between hypoxia and oxidative phosphorylation in herpes stromal keratitis
疱疹性基质角膜炎中缺氧与氧化磷酸化之间的相互作用
- 批准号:
10357859 - 财政年份:2019
- 资助金额:
$ 37.74万 - 项目类别:
Interplay between hypoxia and oxidative phosphorylation in herpes stromal keratitis
疱疹性基质角膜炎中缺氧与氧化磷酸化之间的相互作用
- 批准号:
10586030 - 财政年份:2019
- 资助金额:
$ 37.74万 - 项目类别:
Corneal neuropeptides and herpetic stromal keratitis
角膜神经肽与疱疹性基质角膜炎
- 批准号:
8616376 - 财政年份:2013
- 资助金额:
$ 37.74万 - 项目类别:
Corneal neuropeptides and herpetic stromal keratitis
角膜神经肽与疱疹性基质角膜炎
- 批准号:
8504248 - 财政年份:2013
- 资助金额:
$ 37.74万 - 项目类别:
Corneal neuropeptides and herpetic stromal keratitis
角膜神经肽与疱疹性基质角膜炎
- 批准号:
9248405 - 财政年份:2013
- 资助金额:
$ 37.74万 - 项目类别:
Corneal neuropeptides and herpetic stromal keratitis
角膜神经肽与疱疹性基质角膜炎
- 批准号:
8912631 - 财政年份:2013
- 资助金额:
$ 37.74万 - 项目类别:














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