A Peripheral Route for Gut to Brain Propagation of Pathologic Alpha-Synuclein in Parkinson's Disease
帕金森病病理性α-突触核蛋白从肠道到大脑传播的外周途径
基本信息
- 批准号:9329202
- 负责人:
- 金额:$ 5.71万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2017
- 资助国家:美国
- 起止时间:2017-03-01 至 2020-02-29
- 项目状态:已结题
- 来源:
- 关键词:AddressAdultAffectAffinityAgeAgingBehaviorBiocompatible MaterialsBrainCapsidCellsComplexData SetDependovirusDevelopmentDiagnosisDiagnosticDimensionsDuodenumElectrophysiology (science)EnteralEnteric Nervous SystemFiberGoalsHealthHistologyHybridsHydrogelsImageIn SituIn VitroInjectableInjection of therapeutic agentInterneuronsIon ChannelLewy BodiesLightLipidsMeasuresMedical RecordsMethodsMotorMovementMusNerveNeuraxisNeuritesNeurodegenerative DisordersNeuronsOpticsOrganOrganismParkinson DiseasePathologicPathologyPatientsPerfusionPeripheralPeripheral Nervous SystemPermeabilityPhasePhysiologicalPhysiologyPoly(ADP-ribose) PolymerasesPopulationProcessPropertyProteinsReportingResearchResearch SupportResolutionRoleRouteSalineSeedsSignal TransductionStomachSubstantia nigra structureSystemTechniquesTestingTherapeuticTherapeutic InterventionTissuesTrainingVagus nerve structureViralWorkagedalpha synucleindopaminergic neuronexperimental studygastrointestinalgastrointestinal systemin vivomacromoleculemotor deficitmotor disordermotor impairmentmotor symptomnerve supplyneurophysiologyneurotoxicneurotransmissionnon-motor symptomnovelnovel diagnosticsoptogeneticspatch clamppresynapticrelating to nervous systemspatiotemporaltheoriestooluptake
项目摘要
PROJECT SUMMARY
The aggregation and accumulation of alpha-synuclein (aSyn) fibrils results in histopathological inclusions
called Lewy bodies and Lewy neurites and is observed in several neurodegenerative disorders. In Parkinson’s
disease (PD), this culminates in the degeneration of dopaminergic neurons in the substantia nigra and severe
motor impairment. Emerging findings suggest that PD may have a prodromal phase characterized by non-
motor symptoms such as gastrointestinal disturbances. Thus, it is hypothesized that pathologic aSyn might first
accumulate in peripheral tissue before propagating to the brain where it precipitates PD pathology. This is
supported by research that shows that aSyn fibrils are capable of interneuronal transport and can seed the
formation of additional fibrils from endogenous aSyn. The goal of this proposal is to provide me with
training in advanced techniques to interrogate peripheral nervous systems in mice. I will use these
techniques to test the hypothesis that pathologic aSyn propagates from enteric neurons in the gut to
the brain via the vagus nerve in an age- and activity-dependent manner, eventually damaging the
dopaminergic system that coordinates movement. To visualize aSyn fibrils, enteric populations, and nerve
tracts in high resolution, I will use the CLARITY tissue clearing method developed in our lab that renders whole
organs and organisms optically transparent and macromolecule permeable. I will also use novel quantitative
measures to analyze large three-dimensional datasets. I will use a novel adeno associated virus capsid that
has increased affinity for peripheral neurons to deliver constructs to neurons and nerves in the enteric nervous
system. I will use whole cell patch clamp recordings to determine the effect of aSyn fibrils on enteric neuron
electrophysiology and neurotransmission. Lastly, I will use optogenetics to explore an activity-dependent
mechanism of aSyn uptake and release. Upon completion, the experiments detailed in this proposal will
contribute to our understanding of pathologic aSyn formation in the gut and their propagation to the brain, and
will be key in developing novel diagnostic and therapeutic strategies for PD.
项目摘要
α-突触核蛋白(aSyn)原纤维的聚集和积累导致组织病理学包涵体
称为路易体和路易神经突,并在几种神经退行性疾病中观察到。
在帕金森病(PD)中,这最终导致黑质中多巴胺能神经元的变性和严重的帕金森病。
新的研究结果表明,PD可能有一个前驱期,其特征是非运动障碍。
运动症状,如胃肠道紊乱。因此,假设病理性aSyn可能首先
在传播到大脑之前在外周组织中积累,在大脑中它沉淀PD病理。
研究表明,aSyn原纤维能够进行神经元间转运,并可以在神经元间形成种子。
从内源性aSyn形成额外的原纤维。本提案的目标是为我提供
训练先进的技术来询问小鼠的外周神经系统。我将使用这些
技术来检验病理性aSyn从肠道中的肠神经元传播到
大脑通过迷走神经以一种年龄和活动依赖的方式,最终损害大脑。
协调运动的多巴胺能系统。为了可视化aSyn纤维、肠道种群和神经
在高分辨率下,我将使用我们实验室开发的组织透明化方法,
器官和生物体光学透明和高分子渗透。我还将使用新的定量
我将使用一种新的腺相关病毒衣壳,
对外周神经元的亲和力增加,以将构建体递送至肠神经系统中的神经元和神经,
我将使用全细胞膜片钳记录来确定aSyn原纤维对肠神经元的影响。
最后,我将使用光遗传学来探索一种依赖于活动的神经传导机制。
aSyn摄取和释放的机制。完成后,本提案中详述的实验将
有助于我们理解肠道中病理性aSyn的形成及其向大脑的传播,
将是开发新型PD诊断和治疗策略的关键。
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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Collin M Challis其他文献
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{{ truncateString('Collin M Challis', 18)}}的其他基金
Top-Down Control of Serotonergic Circuits in Depressive-Like Behaviors
抑郁样行为中血清素能回路的自上而下控制
- 批准号:
8456389 - 财政年份:2013
- 资助金额:
$ 5.71万 - 项目类别:
Top-Down Control of Serotonergic Circuits in Depressive-Like Behaviors
抑郁样行为中血清素能回路的自上而下控制
- 批准号:
8635219 - 财政年份:2013
- 资助金额:
$ 5.71万 - 项目类别:
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