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A multi-omic approach to elucidate novel disease mechanisms and biomarkers for psychosis in Alzheimer’s disease

采用多组学方法阐明阿尔茨海默病精神病的新疾病机制和生物标志物

基本信息

批准号：
10451794
负责人：
Julia K Kofler
金额：
$ 27.52万
依托单位：
UNIVERSITY OF EXETER
依托单位国家：
美国
项目类别：
财政年份：
2019
资助国家：
美国
起止时间：
2019-09-15 至 2024-05-31
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/10451794
关键词：
Alzheimer&apos s Disease Alzheimer&apos s disease patient Alzheimer&apos s disease risk Alzheimer&apos s disease therapy Alzheimer’s disease biomarker Automobile Driving Autopsy Biological Markers Blood Blood specimen Brain Clinical Cognition Collection DNA Methylation Data Data Set Delusions Dementia Development Disease Disease Progression Early identification Etiology Gene Expression Genetic Fingerprintings Genetic Polymorphism Genetic study Genome Genomics Grant Hallucinations Hospitalization Impaired cognition Individual Intervention Licensing Link Methodology Modeling Molecular Molecular Disease Molecular Genetics Multiomic Data Network-based Neurobiology Patients Peripheral Persons Pharmaceutical Preparations Prefrontal Cortex Process Progressive Disease Psychoses Psychotic Disorders Regulation Research Research Methodology Risk Sampling Schizophrenia Series Single Nucleotide Polymorphism Specificity Stratification Stroke Symptoms Syndrome Testing Tissue Sample United States National Institutes of Health Variant Work analytical method atypical antipsychotic biomarker development cell type cohort effective therapy epigenomics genetic profiling genome-wide genomic profiles methylomics mild cognitive impairment mortality multiple omics neuroimaging neuropathology neuropsychiatry new therapeutic target novel psychotic symptoms symptom treatment transcriptomics

项目摘要

PROJECT SUMMARY Psychosis is an often debilitating syndrome occurring in 40-60% of people with Alzheimer's disease (AD). Psychosis in AD (AD+P) is associated with a more severe disease course, mortality, hospitalization, carer burden and faster decline in cognition and function. Atypical antipsychotics – first developed for schizophrenia - are widely used off license to treat these symptoms, with minimal benefits and considerable harm, including a 1.5- to 1.8-fold increase in mortality and a 3- fold increase in stroke. The development of safe and effective therapies for AD+P is an urgent priority, which has to start with a better understanding of disease mechanisms. There is abundant evidence from post-mortem, neuroimaging and genetic studies that AD-P is associated with a distinct profile of neurobiological changes but little is known about the molecular processes driving etiology. Moreover, one of the most robust clinical correlates of AD+P is a more rapid cognitive decline the trajectory of which appears to diverge before the onset of symptoms, suggests that stratification of individuals early in the disease by biomarkers that suggest the individual will develop psychosis could bring clinical benefits by identifying individuals at risk of AD+P and targeting interventions to them before the onset of symptoms. Thus, in this project we will test our overall hypothesis that AD+P is characterized by specific molecular changes in both the brain and blood that cut across multiple layers of genomic regulation. The main aim of this project is to identify novel disease mechanisms and biomarkers of AD+P, via the following specific aims; 1: Identify novel disease mechanisms implicated in AD+P; 2: Identify specific signatures of psychotic symptoms in blood samples of individuals with AD+P and evaluate their potential to predict whether individuals with MCI are more likely to develop AD; 3: Elucidate the extent to which psychotic symptoms in AD are mechanistically linked to schizophrenia The study brings together unique sample cohorts, cutting-edge methodologies and world-leading experts in genome regulation, clinical neuropsychiatry and AD neuropathology. This project builds on the state-of-the-art research methods utilized in our previously successful NIH R01 grants. The project will provide a major step forward in identifying 1) novel drug targets for AD+P, 2) better treatment of AD+P with existing medications and 3) novel peripheral biomarkers to predict which individuals with MCI will develop AD+P and are thus more likely to have a rapidly progressive disease course.

项目摘要精神病是一种经常使人衰弱的综合征，发生在40-60%的阿尔茨海默病（AD）患者中。 AD（AD+P）中的精神病与更严重的病程、死亡率、住院治疗、照顾者负担相关认知能力和功能下降得更快。非典型抗精神病药-首先开发用于精神分裂症-是广泛使用的关闭许可证，以治疗这些症状，具有最小的好处和相当大的伤害，包括1.5- 死亡率增加1.8倍，中风增加3倍。开发安全有效的治疗方法对于AD+P是一个紧迫的优先事项，这必须从更好地了解疾病机制开始。有来自尸检、神经影像学和遗传学研究的大量证据表明，AD-P与一种独特的神经生物学的变化，但很少有人知道的分子过程驱动的病因。此外，委员会认为， AD+P最强有力的临床相关性之一是更快速的认知下降，其轨迹出现在在症状出现之前出现分歧，表明在疾病早期对个体进行分层，表明个体将发展为精神病的生物标志物可以通过识别有AD+P风险的个体，并在症状发作前针对他们进行干预。所以针对本我们将测试我们的总体假设，即AD+P的特征是在两个特定的分子变化，大脑和血液的基因组调控的多个层面。该项目的主要目的是确定 AD+P的新疾病机制和生物标志物，通过以下具体目标：1：识别新疾病 AD+P中涉及的机制; 2：确定AD + P患者血液样本中精神病症状的特定特征 AD+P患者，并评估其预测MCI患者是否更有可能发展AD; 3：阐明AD中的精神病性症状在多大程度上与精神分裂这项研究汇集了独特的样本队列，尖端的方法和世界领先的专家，基因组调控、临床神经精神病学和AD神经病理学。这个项目建立在最先进的我们以前成功的NIH R 01赠款中使用的研究方法。该项目将提供一个重大步骤，在确定1）AD+P的新药物靶点方面取得了进展，2）用现有药物更好地治疗AD+P， 3)新的外周生物标志物，以预测哪些MCI个体将发展为AD+P，病情进展迅速。