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Retromer deficiency and Alzheimer's disease pathology

逆转录酶缺乏与阿尔茨海默病病理学

基本信息

批准号：
8842912
负责人：
WEN-CHENG XIONG
金额：
$ 30.19万
依托单位：
AUGUSTA UNIVERSITY
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：
2014-05-01 至 2019-04-30
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/8842912
关键词：
Address Age Age-Years Alzheimer&apos s Disease Alzheimer&apos s disease model Amino Acids Amyloid Amyloid beta-Protein Precursor Autopsy Brain Cell physiology Chronic Cognitive deficits Defect Deficiency Diseases Dementia Dendrites Dendritic Spines Deposition Disease Encephalitis Endosomes Exhibits Family Functional disorder Genes Glutamates Goals Golgi Apparatus Health Heterozygote Hippocampus (Brain)Inflammation Inflammatory Interneurons Late Onset Alzheimer Disease Learning Mediating Membrane Proteins Memory MicroRNAs Microglia Morphology Mus Mutate Mutation Nerve Degeneration Neurodegenerative Disorders Neuronal Dysfunction Neurons Parkinson Disease Pathogenesis Pathologic Pathology Patients Peptides Phenotype Presenile Alzheimer Dementia Proteins Publications Research Resistance Retrieval Risk Factors Signal Transduction Slice Swelling Synapses TNF gene TNFSF11 gene Testing Text Tg2576 Vacuolar Protein Sorting axonal degeneration beta-site APP cleaving enzyme 1 clinical investigation cytokine hippocampal pyramidal neuron interest morris water maze mutant neuropathology neurotransmission novel novel therapeutics prevent secretase selective expression small hairpin RNA trafficking treatment strategy young adult

项目摘要

DESCRIPTION (provided by applicant): VPS35 is a major component of retromer that is essential for selective endosome-to-Golgi retrieval of membrane proteins. Dysfunction of VPS35/retromer is implicated in the pathogenesis of Alzheimer's disease (AD) as well as Parkinson's disease (PD), because mutations in Vps35 and SorLA (a cargo of retromer) genes have been identified in the late-onset PD and AD patients, respectively. Thus, it is of considerable interest to investigate how VPS35/retromer deficiency contributes to neurodegeneration. Three hypotheses will be tested in this proposal. The first hypothesis is that VPS35/retromer expression in pyramidal neurons is critical to prevent AD-relevant neuropathology. The second hypothesis is that VPS35/retromer deficient neurons are impaired in BACE1 retrograde trafficking, thus increasing BACE1 activity and promoting dendritic and axonal degeneration. The third hypothesis is that VPS35/retromer deficient microglial cells are hypersensitive to TNF¿ family cytokines, releasing excessive proinflammatory cytokines and promoting brain inflammation and neurodegeneration. Both hypotheses are supported by our publications and recent preliminary studies. We hope that the proposed studies will not only establish novel cellular functions of VPS35/retromer in preventing hyper-activation of BACE1 and microglia, but also shed new lights into pathogenesis of neurodegenerative disorders, such as AD and PD. We also hope that this research may point to new therapeutic strategies for the treatment of these disorders.

描述（由申请人提供）：VPS 35是retromer的主要组分，对于膜蛋白的选择性内体-高尔基体修复至关重要。Vps 35/retromer功能障碍与阿尔茨海默病（AD）以及帕金森病（PD）的发病机制有关，因为Vps 35和SorLA（retromer的货物）基因的突变已分别在晚发性PD和AD患者中被鉴定。因此，研究VPS 35/retromer缺陷如何促进神经变性是相当有趣的。本提案将检验三个假设。第一个假设是VPS 35/retromer在锥体神经元中的表达对于预防AD相关的神经病理学至关重要。第二个假设是VPS 35/retromer缺陷神经元在BACE 1逆行运输中受损，从而增加BACE 1活性并促进树突和轴突变性。第三个假设是VPS 35/retromer缺陷的小胶质细胞对TNF家族细胞因子高度敏感，释放过量的促炎细胞因子并促进脑炎症和神经变性。这两种假设都得到了我们的出版物和最近的初步研究的支持。我们希望这些研究不仅能建立VPS 35/retromer在预防BACE 1和小胶质细胞过度激活方面的新细胞功能，而且还能为神经退行性疾病（如AD和PD）的发病机制提供新的线索。我们也希望这项研究可以为治疗这些疾病提供新的治疗策略。