Integrative Network Biology Approaches to Identify, Characterize and Validate Molecular Subtypes in Alzheimer's Disease

识别、表征和验证阿尔茨海默病分子亚型的综合网络生物学方法

基本信息

批准号：
10005927
负责人：
MICHELLE E EHRLICH
金额：
$ 311.56万
依托单位：
ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI
依托单位国家：
美国
项目类别：
财政年份：
2014
资助国家：
美国
起止时间：
2014-05-15 至 2023-08-31
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/10005927
关键词：
3-Dimensional AD transgenic mice Age Alzheimer&apos s Disease Alzheimer&apos s disease brain Alzheimer&apos s disease model Alzheimer&apos s disease pathology Alzheimer&apos s disease patient Amyloid Fibrils Amyloid beta-Protein Amyloidosis Astrocytes Autopsy Biological Assay Biology Brain Brain region CRISPR/Cas technology Cell Culture Techniques Cells Characteristics Clinical Clinical Trials Coculture Techniques Cognition Complex Data Data Set Development Diagnosis Diffusion Magnetic Resonance Imaging Disease Epigenetic Process Etiology Functional Magnetic Resonance Imaging Functional disorder Gene Expression Genes Genetic Genetic Diseases Genetic Transcription Genomics Heterogeneity Human In Vitro Individual Knock-out Knowledge Late Onset Alzheimer Disease Light Maps Measures Modeling Molecular Molecular Profiling Mus Neurites Neurobiology Neurofibrillary Tangles Neuroglia Neurons Organoids Pathway Analysis Penetrance Performance Phenotype Population Proteomics Protocols documentation Quality Control Recombinants Role Sampling Senile Plaques Signal Transduction Specificity Structure System Tauopathies Testing Thick Transgenic Mice Validation Work brain cell cell type clinical phenotype cohort course development disorder subtype experimental study extracellular high dimensionality improved in vivo indexing individualized medicine induced pluripotent stem cell insight knock-down large scale data metabolomics molecular imaging molecular scale molecular subtypes mouse model multidimensional data network models neuroimaging novel outcome forecast overexpression patient subsets precision medicine relating to nervous system screening single cell analysis single-cell RNA sequencing tau-1 transcriptome sequencing transcriptomics

项目摘要

Project Summary Alzheimer's disease (AD) pathology is characterized by the presence of phosphorylated tau in neurofibrillary tangles (NFTs), dystrophic neurites and abundant extracellular β-amyloid in senile plaques. However, the etiology of AD remains elusive, partly due to the wide spectrum of clinical and neurobiological/neuropathological features in AD patients. Thus, heterogeneity in AD has complicated the task of discovering disease-modifying treatments and developing accurate in vivo indices for diagnosis and clinical prognosis. Different approaches have been proposed for AD subtyping, but they are generally neither suitable for high-dimensional data nor actionable due to the lack of mechanistic insights. Increased knowledge and understanding of different AD subtypes would shed light on recently failed clinical trials and provide for the potential to tailor treatments with specificity to more homogeneous subgroups of patients. By integrating genetic, molecular and neuroimaging data to more precisely define AD subtypes, we may be able to better discriminate between highly overlapping clinical phenotypes. Furthermore, the identification of such subtypes may potentially improve our understanding of its underlying pathomechanisms, prediction of its course, and the development of novel disease-modifying treatments. In this application, we propose to systematically identify and characterize molecular subtypes of AD by developing and employing cutting-edge network biology approaches to multiple existing large-scale genetic, gene expression, proteomic and functional MRI datasets. We will investigate the functional roles of key drivers underlying predicted AD subtypes as well as three candidate key drivers from our current AMP-AD consortia work in control and AD hiPSC-derived neural co-culture systems and then in complex organoids by screening the predicted transcriptional impact of top key drivers in single cell and cell-population-wide analyses. Functional assays in each cell type will be used to build evidence for relevance to AD-subtype phenotypes. Single cell RNA sequencing data will be generated to identify perturbation signatures in selected drivers that will then be mapped to subtype specific networks to build comprehensive signaling maps for each driver. The top three most promising drivers of AD subtypes and the three existing AMP-AD targets will be further validated using a) an independent postmortem cohort, and b) recombinant mice, including amyloidosis, tauopathy and new “humanized” models.

项目概要阿尔茨海默病 (AD) 病理学的特征是磷酸化 tau 蛋白的存在老年神经原纤维缠结（NFT）、营养不良的神经突和丰富的细胞外 β-淀粉样蛋白然而，AD 的病因仍然难以捉摸，部分原因是其临床和病理范围广泛。 AD 患者的神经生物学/神经病理学特征因此，AD 的异质性变得复杂。发现疾病缓解疗法并开发准确的体内指数的任务对于 AD 亚型的诊断和临床预后提出了不同的方法，但是它们通常既不适合高维数据，也由于缺乏可操作性增加对不同 AD 亚型的认识和理解。回顾最近失败的临床试验，并提供针对特定情况定制治疗的可能性通过整合遗传、分子和神经影像数据，形成更同质的患者亚组。为了更精确地定义 AD 亚型，我们也许能够更好地区分高度不同的 AD 亚型。此外，这些亚型的识别可能存在重叠。提高我们对其潜在病理机制的理解、对其病程的预测以及在此应用中，我们建议系统地开发新的疾病缓解疗法。通过开发和采用尖端技术来识别和表征 AD 的分子亚型网络生物学方法可用于多种现有的大规模遗传、基因表达、蛋白质组学和我们将研究预测的关键驱动因素的功能作用。 AD 子类型以及我们当前 AMP-AD 联盟的三个候选关键驱动因素控制和 AD hiPSC 衍生的神经共培养系统，然后通过筛选在复杂的类器官中单细胞和细胞群分析中最关键驱动因素的预测转录影响。每种细胞类型的功能测定将用于建立与 AD 亚型相关的证据将生成单细胞 RNA 测序数据来识别扰动特征。然后将选定的驱动程序映射到子类型特定网络以构建全面的每个驱动程序的信号图。AD 亚型的前三个最有希望的驱动程序以及三个驱动程序。现有的 AMP-AD 目标将使用 a) 独立的尸检队列进一步验证，以及 b) 重组小鼠，包括淀粉样变性、tau蛋白病和新的“人源化”模型。