Probing Heterogeneity of Alzheimer's disease using iPSCs
Probing Heterogeneity of Alzheimer's disease using iPSCs
批准号:
10400951
负责人:
Tracy L YOUNG-PEARSE
金额:
$48.93万
依托单位国家:
美国
项目类别:
财政年份:
2018
资助国家:
美国
项目状态:
已结题
起止时间:
2018-07-15 至 2023-05-31
关键词:
AddressAdultAge of OnsetAgingAlzheimer&aposs DiseaseAlzheimer&aposs disease pathologyAlzheimer&aposs disease patientAmyloidAmyloid beta-ProteinAstrocytesAutopsyBrainBrain PathologyCategoriesCell LineCell modelCellsCellular AssayCerebral cortexClinicalClinical DataClinical TrialsCoculture TechniquesCognitionCognitiveCoupledDataData SetDegenerative DisorderDementiaDeteriorationDiseaseEarly InterventionEarly Onset Alzheimer DiseaseEarly intervention trialsEnzyme-Linked Immunosorbent AssayEnzymesEtiologyFunctional disorderFunding AgencyGenerationsGenesGeneticGoalsHeterogeneityHumanINPPL1 geneImpaired cognitionIn VitroIndividualInduced pluripotent stem cell derived neuronsInheritedInositolInterventionLate Onset Alzheimer DiseaseLocationMapsMeasurementMeasuresMemoryMemory LossMethodsMicrogliaMissense MutationModelingMolecularMolecular ProfilingMutationNerve DegenerationNeurodegenerative DisordersNeurofibrillary TanglesNeurogliaNeuronsOutcomePathogenesisPathologicPathologistPathologyPathway AnalysisPathway interactionsPeptide HydrolasesPhenotypePhosphoric Monoester HydrolasesPlayPredispositionProsencephalonProtein PrecursorsProteomeProteomicsRiskRisk FactorsRoleSenile PlaquesSeriesSignal PathwayStatistical ModelsStudy SubjectSubgroupSusceptibility GeneSystemSystems BiologyTauopathiesTestingTherapeutic InterventionWestern Blottingagedbrain cellbrain tissuechemokinecohortcomorbiditycytokinediagnostic toolearly detection biomarkersearly onsetextracellularfamilial Alzheimer diseasegenome wide association studyglial activationhuman subjecthyperphosphorylated tauimprovedinduced pluripotent stem cellinduced pluripotent stem cell technologyinositol-1,4,5-trisphosphate 5-phosphataseneuropathologyneurotoxicnovelpatient populationpatient subsetsphosphoinositide-3,4,5-triphosphatephosphoinositide-3,4-bisphosphatepredictive markerpresenilinprognostic toolreligious order studystem cellssymptom managementtargeted treatmenttau Proteinstau-1therapeutic developmenttherapeutically effectivetranscriptometranscriptome sequencingtranscriptomics
中文摘要
阿尔茨海默氏病(AD)是一种常见的神经退行性疾病,其特征是神经功能障碍和脑功能恶化。
神经元导致记忆能力的丧失和进行性的认知能力下降。目前的治疗方法通常只针对儿童。
症状和管理。有效的治疗药物开发的三个障碍包括:1)缺乏对药物的定义。
阿尔茨海默病发病机制的异质性,(2)缺乏具有高度预测性的生物标记物,以促进早期干预、治疗和治疗。
3)我们需要进一步确定参与认知功能下降的途径,以及不能有针对性地用于治疗的途径。
干预。我们正在使用人工诱导的多能干细胞移植(IPSC)技术,并将其结合起来进行全面的临床研究。
患者群体将继续询问潜在的AD患者的细胞学和分子生物学机制,以进一步努力解决这一问题。
通过这些障碍,我们可以提出,不存在多种形式的AD,它们具有不同的潜在原因、影响和影响。
这意味着可能需要多种治疗性医疗干预措施,以解决不同的病因。通过其他医疗资金。
消息来源说,我们已经从两个不同的队列中产生了大约50条iPSC线路,包括宗教秩序和学习秩序(ROS)以及最新的记忆。
以及老龄化工程(MAP)。在这里,我们建议对这些线进行深入研究,其中我们将重点关注以下三个方面。
受试者认为,他们依赖于病理图谱的极端结局:1)没有大脑病理,没有认知上的障碍。
损害,2)高病理不包括认知损害,3)高病理,阿尔茨海默病起病晚。
此外,我们还从家族性阿尔茨海默病受试者那里收集了和/或收集的iPSC系列产品线,这些产品将在未来进行进一步分析。
平行。通过使用iPSC从60多名人类健康受试者中提取的神经元、星形胶质细胞、神经元和小胶质细胞,我们将进一步测量AD。
相关的结果(Aβ,P-tau,细胞因子/趋化因子)在目标1中发挥作用,并获得公正的转录和转录因子。
蛋白质组学数据将在Aim 2中发布。其中这些数据将与临床数据、神经病理学数据、生物和遗传数据进一步整合。
从相同的受试者那里获得的数据,以及这些细胞是从谁那里获得的,是通过使用多种计算机技术方法得出的。
我们假设:(1)在死后的大脑中,一些病理改变是无法通过体外和细胞内的实验来预测的。
对iPSC衍生的神经元和神经胶质细胞的分析表明,在某些情况下,神经病理改变和认知能力下降。
通过对IPSC衍生的转录水平和蛋白质组水平的网络分析,可以很好地预测人类基因组的受试者。
神经元和神经胶质细胞。来自12个细胞系的初步数据支持这样一个假设,即iPSC来源的干细胞不会捕获某些特定的细胞。
细胞基因组和分子生物学签名可以定义老年人的亚群。他们的数据来自所有50个ROS/MAP细胞系和Eoad。
在其目标1中生成的模型和在2中生成的模型将为它们提供一个定义良好的模型框架,以更好地解决这些机械性的问题。
关于公元3年,我们将充分利用一套由iPSC衍生的互联网文化,以解决这一问题。
假说是INPP5D基因(SHIP1)和/或INPPL1基因(SHIP2)的肌醇和5-磷酸酶活性异常导致的。
通过这些研究,我们的目标是更好地评估是否存在IPSC-?
派生的干细胞可以作为认知功能下降的早期诊断工具或预后预测工具,并开始解决这一问题。
细胞遗传和分子生物学机制是体内潜在的细胞异质性的基础。
英文摘要
Alzheimer’s disease (AD) is a neurodegenerative disorder characterized by dysfunction and deterioration of
neurons resulting in loss of memory and progressive cognitive decline. Current treatments are aimed only at
symptom management. Three barriers to effective therapeutic development include: 1) a lack of definition of the
heterogeneity of AD pathogenesis, 2) a lack of highly predictive biomarkers to facilitate early intervention, and
3) a need to identify pathways involved in cognitive decline and AD that can be targeted for therapeutic
intervention. We are using induced pluripotent stem cell (iPSC) technology coupled to comprehensive studies of
patient populations to interrogate the cellular and molecular mechanisms underlying AD in an effort to break
down these barriers. We propose that there exist multiple forms of AD that have different underlying causes, and
that multiple therapeutic interventions may be needed to address disparate etiologies. Through other funding
sources, we have generated 50 iPSC lines from two cohorts, the Religious Order Study (ROS) and the Memory
and Aging Project (MAP). Here, we propose to study these lines, where we focus upon three categories of
subjects that lie on the extreme ends of the pathological spectrum: 1) no brain pathology, not cognitively
impaired, 2) high pathology not cognitively impaired, and 3) high pathology, late onset Alzheimer’s disease. In
addition, we have generated and/or collected iPSC lines from familial AD subjects, which will be analyzed in
parallel. Using iPSC derived neurons, astrocytes, and microglia from 60 human subjects, we will measure AD
relevant outcomes (Aβ, p-tau, cytokines/chemokines) in Aim 1 and acquire unbiased transcriptomic and
proteomic data in Aim 2. These data will be integrated with clinical data, neuropathology data, and genetic data
acquired from the same subjects from whom the cells were derived using multiple computational approaches.
We hypothesize that: 1) Some pathological findings in the postmortem brain can be predicted by in vitro cellular
assays on iPSC derived neurons and glia (Aim 1), and 2) Both neuropathology and cognitive decline in some
human subjects can be predicted by transcriptomic and proteomic level network analyses of iPSC derived
neurons and glia. Preliminary data from 12 lines supports the premise that iPSC-derived cells will capture certain
cell and molecular signatures that define subgroups of aged adults. Data from all 50 ROS/MAP lines and EOAD
models generated in aims 1 and 2 will provide a well-defined framework to address mechanistic questions
regarding AD. In Aim 3 we will leverage the deeply characterized set of iPSC-derived cultures to address the
hypothesis that dysregulated inositol 5-phosphatase activity of INPP5D (SHIP1) and/or INPPL1 (SHIP2) leads
to an elevated risk for LOAD in a subset of subjects. Through these studies, we aim to evaluate whether iPSC-
derived cells can act as a diagnostic or prognostic tool for cognitive decline and AD, and begin to address the
cell and molecular mechanisms underlying heterogeneity in LOAD.
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