The role of LTBP2 in glaucoma
LTBP2在青光眼中的作用
基本信息
- 批准号:10608873
- 负责人:
- 金额:$ 23.33万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2023
- 资助国家:美国
- 起止时间:2023-03-01 至 2025-02-28
- 项目状态:未结题
- 来源:
- 关键词:ActinsAddressAdultAffectAgeAngiographyAnimal ModelAnimalsAnteriorAqueous HumorBinding ProteinsBiologicalBiological AssayBiologyBirthBlindnessCatalogsCell Culture TechniquesCell ProliferationCell-Matrix JunctionCellsCellular biologyChildhoodCiliary epitheliumClinicalComplexCytoskeletonDataDepositionDevelopmentDistalEnsureEquilibriumExtracellular MatrixEyeFamily FelidaeFelis catusFibrosisFluorescence MicroscopyFocal AdhesionsFoundationsFunctional disorderFutureGene ExpressionGenesGenetic ModelsGlaucomaGoalsHeterozygoteHomeostasisHomologous GeneHumanHydrophthalmosImageIn SituIn VitroIncubatedInheritedKnock-outKnowledgeLabelLasersLifeLightMFAP1 geneMediatingMicrofibrilsMicrofilamentsMicroscopyModelingMolecularMorphologyMutationOpen-Angle GlaucomaPathogenesisPathologicPathologyPathway interactionsPatientsPersonsPhenotypePhysiologic Intraocular PressurePhysiologicalPhysiologyPlayProcessProductionProliferatingProtein IsoformsProteinsPublishingRecombinantsRegulationReportingResistanceRoleSignal TransductionSmall Interfering RNAStainsStructureTestingTherapeuticTherapeutic InterventionThick FilamentThird Pregnancy TrimesterTissuesTrabecular meshwork structureTranscriptTransforming Growth Factor betaTransgenic MiceTranslational ResearchValidationVinculinVisionWestern BlottingWorkaqueouscausal variantcell behaviorcrosslinkdesigndifferential expressionearly onsetin vivoinfancyinnovationinterestknock-downmorphometrynoveloptic nerve disorderperinatal periodpostnatalpreservationpressurepreventprimary congenital glaucomaprotein expressionpublic health relevancetargeted treatmenttranscriptomic profilingtranscriptomicstranslational modeltranslational potentialtreatment strategyvector control
项目摘要
Summary:
A unique animal model of glaucoma with spontaneously arising mutation in LTBP2 has been established. This
gene is implicated in heterogeneous glaucoma phenotypes, including human primary congenital glaucoma
(PCG) as well as some forms of adult-onset open angle glaucoma. As the only known large animal homolog of
inherited glaucoma in humans, this model has considerable potential for translational research. Posterior
segment pathology has been extensively characterized and closely recapitulates features of human
glaucomatous optic neuropathy. However, the role played by LTBP2 in the eye remains unknown and the
precise cellular and molecular mechanisms responsible for the underlying elevated intraocular pressure (IOP)
in this form of glaucoma remain unresolved. The objective of this proposal is to identify and localize, as
potential targets for therapeutic intervention, key pathobiological mechanisms that contribute to both early
onset and progressive IOP elevation in this model. In addition to perturbing LTBP2’s acknowledged role in
microfibril assembly, enhanced TGF beta signaling, contributing to extracellular matrix (ECM) accumulation
within the trabecular meshwork (TM) has been proposed as a mechanism for IOP elevation in this
“microfibrillopathy”. However, preliminary studies in our animal model have not established whether significant
increase in aqueous humor TGF beta concentrations represent a cause or effect of IOP elevation. Our central
hypothesis is that LTBP2 is both an important regulator of outflow pathway development and remodeling in the
perinatal period and a regulator of TM cell and ECM biology and pro-fibrotic pathways throughout life,
extending beyond development. We will pursue two specific Aims: Aim 1: To determine the effects of absent
or reduced LTBP2 expression on development of proximal and distal aqueous outflow pathways, we will test
the hypothesis that LTBP2 plays an important role in outflow pathway development and remodeling using a
combination of in vivo and in situ approaches to examine distal outflow morphology and ultrastructure of the
proximal outflow pathway (TM and juxtacanalicular tissue) and ECM components of these pathways in wildtype
and LTBP2+/- and LTBP2-/- eyes. Aim 2: To determine the pathological effects of absent or reduced LTBP2
expression on TM cell (TMC) biology, we will use TMC cultures derived from wildtype, LTBP2+/- and LTBP2-/-
eyes. In Aim 2, we will test the hypotheses that reduced LTBP2 expression will a) negatively impact TMC
attachment and proliferation in vitro and b) enhance the pathologic effects of TGFβ on actin cytoskeleton and
promotion of ECM fibrosis. Successful completion of these Aims will generate new knowledge on the complex
role of LTBP2 in physiology and pathology of the aqueous outflow pathways, providing a critical foundation to
advance our overall goal of designing and testing innovative therapeutic approaches to glaucoma in our unique
translational model.
总结:
已经建立了一种独特的具有LTBP 2自发突变的青光眼动物模型。这
基因与异质性青光眼表型有关,包括人类原发性先天性青光眼
(PCG)以及某些形式的成人型开角型青光眼。作为唯一已知的大型动物同系物
在人类遗传性青光眼中,该模型具有相当大的转化研究潜力。后
节段病理学已被广泛表征,并密切概括了人类
青光眼性视神经病变然而,LTBP 2在眼睛中所起的作用仍然未知,
导致潜在眼内压(IOP)升高的精确细胞和分子机制
这种形式的青光眼仍然没有得到解决。这项建议的目的是确定和本地化,
治疗干预的潜在靶点,有助于早期和晚期癌症的关键病理生物学机制
该模型中的开始和进行性IOP升高。除了扰乱LTBP 2的公认作用,
微纤维组装,增强TGF β信号传导,促进细胞外基质(ECM)积累
在小梁网(TM)内的眼压升高被认为是这种情况下IOP升高的机制。
“微纤维病”。然而,在我们的动物模型的初步研究还没有建立是否显着
房水TGF β浓度增加代表IOP升高的原因或结果。我们的中央
一种假说认为LTBP 2是流出道发育和重构的重要调节因子,
以及TM细胞和ECM生物学和整个生命中的促纤维化途径的调节剂,
超越发展。我们将追求两个具体的目标:目标1:确定缺席的影响
或LTBP 2表达减少对近端和远端房水流出途径的发展,我们将测试
LTBP 2在流出途径的发展和重塑中起重要作用的假设,
结合体内和原位方法,检查远端流出道形态和超微结构,
近端流出途径(TM和近端小管组织)和野生型中这些途径的ECM组分
以及LTBP 2 +/-和LTBP 2-/-眼。目的2:确定LTBP 2缺失或减少的病理学作用
为了在TM细胞(TMC)生物学上表达,我们将使用来源于野生型、LTBP 2 +/-和LTBP 2-/-的TMC培养物,
眼睛在目标2中,我们将检验LTBP 2表达减少将a)负面影响TMC的假设
B)增强TGFβ对肌动蛋白细胞骨架的病理作用,
促进ECM纤维化。成功完成这些目标将产生新的知识复杂
LTBP 2在水流出途径的生理学和病理学中的作用,提供了一个重要的基础,
推进我们的总体目标,设计和测试创新的治疗方法,以青光眼在我们独特的
平移模型
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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Gillian Jane McLellan其他文献
Gillian Jane McLellan的其他文献
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{{ truncateString('Gillian Jane McLellan', 18)}}的其他基金
Disease Mechanisms at the Intersection of Glaucoma and Alzheimer's Disease
青光眼和阿尔茨海默病交叉的疾病机制
- 批准号:
10306895 - 财政年份:2021
- 资助金额:
$ 23.33万 - 项目类别:
Enhanced backscattering instrument for assessing optical biomarkers of glaucoma
用于评估青光眼光学生物标志物的增强型反向散射仪器
- 批准号:
9764362 - 财政年份:2018
- 资助金额:
$ 23.33万 - 项目类别:
Therapeutic Inhibition of Optic Nerve Head Gliosis and Fibrosis in Glaucoma
青光眼视神经乳头胶质增生和纤维化的治疗抑制
- 批准号:
10202607 - 财政年份:2017
- 资助金额:
$ 23.33万 - 项目类别:
Therapeutic Inhibition of Optic Nerve Head Gliosis and Fibrosis in Glaucoma
青光眼视神经乳头胶质增生和纤维化的治疗抑制
- 批准号:
9382204 - 财政年份:2017
- 资助金额:
$ 23.33万 - 项目类别:
Structural and Functional Characterization of a Novel Model for Glaucoma Research
青光眼研究新模型的结构和功能表征
- 批准号:
7685380 - 财政年份:2008
- 资助金额:
$ 23.33万 - 项目类别:
Structural and Functional Characterization of a Novel Model for Glaucoma Research
青光眼研究新模型的结构和功能表征
- 批准号:
7872895 - 财政年份:2008
- 资助金额:
$ 23.33万 - 项目类别:
Structural and Functional Characterization of a Novel Model for Glaucoma Research
青光眼研究新模型的结构和功能表征
- 批准号:
8288212 - 财政年份:2008
- 资助金额:
$ 23.33万 - 项目类别:
Structural and Functional Characterization of a Novel Model for Glaucoma Research
青光眼研究新模型的结构和功能表征
- 批准号:
8098016 - 财政年份:2008
- 资助金额:
$ 23.33万 - 项目类别:
Structural and Functional Characterization of a Novel Model for Glaucoma Research
青光眼研究新模型的结构和功能表征
- 批准号:
7531975 - 财政年份:2008
- 资助金额:
$ 23.33万 - 项目类别:
UW Vision Research Core 3 - Animal Models and Eye Organ Culture
华盛顿大学视觉研究核心 3 - 动物模型和眼器官培养
- 批准号:
10273754 - 财政年份:2005
- 资助金额:
$ 23.33万 - 项目类别:
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