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RNA decay in amyotrophic lateral sclerosis and frontotemporal lobar degeneration

肌萎缩侧索硬化症和额颞叶变性中的 RNA 衰减

基本信息

批准号：
9324055
负责人：
Sami Barmada
金额：
$ 38.75万
依托单位：
UNIVERSITY OF MICHIGAN AT ANN ARBOR
依托单位国家：
美国
项目类别：
财政年份：
2016
资助国家：
美国
起止时间：
2016-08-01 至 2021-07-31
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/9324055
关键词：
Affect Amyotrophic Lateral Sclerosis Animal Model Automobile Driving Binding CRISPR/Cas technology Cell Death Cells Cultured Cells Deposition Disease Disease model Equilibrium Feedback Foundations Frontotemporal Lobar Degenerations Genetic Transcription Genomics Goals High-Throughput Nucleotide Sequencing Homeostasis Human In Situ Individual Investigation Label Lead Maintenance Measures Mediating Messenger RNA Metabolism Methods Microscopy Modeling Molecular Nerve Degeneration Neurodegenerative Disorders Neuronal Dysfunction Neurons Neuroprotective Agents One-Step dentin bonding system Pathogenesis Pathologic Pathway interactions Patients Physiologic pulse Process Prosencephalon RNA RNA Decay RNA Degradation RNA Helicase RNA chemical synthesis RNA-Binding Proteins Reagent Regulation Role Series Spinal Cord Testing Therapeutic Time Transcript base defined contribution effective therapy fluorophore genome editing improved in vivo induced pluripotent stem cell innovation longitudinal analysis neuron loss neuronal survival novel novel therapeutics overexpression prevent prospective survival prediction tool

项目摘要

Abstract Maintenance of RNA homeostasis involves a dynamic balance between RNA synthesis and turnover. This balance is critical for transcriptionally active cells such as neurons, as disruptions to any individual component can lead to RNA misprocessing and cell death. Our preliminary evidence indicates that deficiencies in RNA decay represent a fundamental and heretofore unrecognized mechanism driving neuronal dysfunction and death in the neurodegenerative diseases amyotrophic lateral sclerosis (ALS) and frontotemporal lobar degeneration (FTLD). Our goals with this proposal are to elucidate the role of RNA decay in the pathogenesis of ALS and FTLD, and investigate a unique and promising therapeutic strategy affecting RNA decay. Based upon the results of initial studies, we propose that in ALS and the most common subtype of FTLD, characterized by neuronal deposits of the RNA binding protein TDP43, RNA homeostasis is disrupted by an inappropriate interaction between TDP43 and the RNA helicase UPF1, ultimately resulting in neurodegeneration. We will test this model by i) determining the impact of the TDP43-UPF1 interaction on neuronal survival and RNA decay, ii) evaluating if deficient RNA decay is sufficient and/or necessary for pathologic TDP43 deposition in neurons, and iii) assessing whether UPF1 expression improves neuronal survival by restoring TDP43 and RNA homeostasis. We will pursue these aims using a combination of longitudinal single-cell microscopy of human neurons derived from ALS and FTLD patients, CRISPR/Cas9 genome editing and high-throughput sequencing of pulse-labeled RNA. The multifaceted approach proposed here promises to uncover key pathways controlling neuronal survival in healthy cells and in those affected by ALS and FTLD, and will bring us one step closer to achieving our long-term goal of developing an effective treatment for these and other relentlessly progressive neurodegenerative disorders.

摘要 RNA稳态的维持涉及RNA合成和周转之间的动态平衡。这种平衡对于转录活跃的细胞如神经元至关重要，这可能导致RNA错误加工和细胞死亡。我们的初步证据表明，这些缺陷在RNA中，衰变代表了一种基本且迄今未被认识到的驱动神经元功能障碍的机制肌萎缩侧索硬化症（ALS）和额颞叶神经退行性疾病变性（FTLD）。我们的目标是阐明RNA衰变在发病机制中的作用的ALS和FTLD，并调查一个独特的和有前途的治疗策略影响RNA衰变。基于根据初步研究的结果，我们提出在ALS和最常见的FTLD亚型中，其特征在于RNA结合蛋白TDP 43的神经元沉积，RNA稳态被一种 TDP 43和RNA解旋酶UPF 1之间的不适当相互作用，最终导致神经变性我们将通过i）确定TDP 43-UPF 1相互作用对神经元存活和RNA衰变，ii）评估RNA衰变缺陷是否足以和/或必要 iii）评估UPF 1表达是否改善神经元的病理性TDP 43沉积，通过恢复TDP 43和RNA稳态来存活。我们将通过以下方式实现这些目标：来源于ALS和FTLD患者的人类神经元的纵向单细胞显微镜，CRISPR/Cas9 基因组编辑和脉冲标记RNA的高通量测序。所提议的多方面办法这有望揭示控制健康细胞和受影响细胞中神经元存活的关键途径。 ALS和FTLD，并将使我们更接近实现我们的长期目标，即开发一种有效的治疗这些和其他无情的进展性神经退行性疾病。