Testing miR-132 signaling and replacement as a common strategy for AD, FTD, and related pathologies
Testing miR-132 signaling and replacement as a common strategy for AD, FTD, and related pathologies
批准号:
10228414
负责人:
Anna M. Krichevsky
金额:
$84.39万
依托单位国家:
美国
项目类别:
财政年份:
2020
资助国家:
美国
项目状态:
已结题
起止时间:
2020-09-30 至 2022-08-31
关键词:
AffectAgingAlzheimer&aposs DiseaseAlzheimer&aposs disease pathologyAlzheimer&aposs disease related dementiaAlzheimer&aposs disease therapyAmyloidApoptoticAutopsyBiologyBrainBrain PathologyCell DeathCell modelCessation of lifeClinicalCodeCognitionCognitiveDataDementiaDevelopmentDiagnosisDiseaseDown-RegulationFrontotemporal DementiaGene ExpressionGenesGeneticGenetic TranscriptionGlutamatesGoalsHealthHippocampus (Brain)HumanHuntington DiseaseInvestigationLaboratoriesLeadLearningLinkMAPT geneMediatingMedicineMemoryMetabolicMetabolismMicroRNAsModelingMolecularMolecular TargetMusMutationNerve DegenerationNervous system structureNeurodegenerative DisordersNeurofibrillary TanglesNeuronal PlasticityNeuronsOligonucleotidesParkinson DiseasePathogenesisPathogenicityPathologicPathologyPathway interactionsPatientsPhenotypePhysiologicalPlayPrefrontal CortexProgressive Supranuclear PalsyPropertyRNARNA metabolismRegulationRegulator GenesRodentRoleSenile PlaquesSignal PathwaySignal TransductionSmall RNASocietiesSupplementationSynapsesSynaptic plasticityTauopathiesTechnologyTemporal LobeTestingToxic effectToxinTransgenic ModelWorkamyloid pathologybiological adaptation to stresscosteffective therapyfamilial Alzheimer diseasein vivoinduced pluripotent stem cellinsightmouse modelmutantneuron developmentneuron lossneuropathologyneurophysiologyneuroprotectionnovelnovel therapeuticsoverexpressionpre-clinicalpresenilinrelating to nervous systemreligious order studystressortau Proteinstau aggregationtherapeutic miRNAuptake
中文摘要
《项目摘要》/《摘要》
阿尔茨海默氏症(AD)和额颞叶痴呆(FTD)是最常见的神经退行性疾病。
这些疾病可能会导致数以百万计的中国患者患上痴呆症。受这些疾病影响的中国人的数量也越来越多。
据预测,在未来20年内,人类社会的相应成本将翻一番。我们将致力于开发有效的治疗方法,以及新的治疗方法。
生物医学的新方法、新概念、新技术和新的分子生物学靶点是非常需要的。这是一门全新的学科的发现之旅。
一种被称为微核糖核酸(MiRNA)的分子生物学调节器已经给生物学带来了革命性的变化,预计它将成为一项重大技术。
对医学的影响。MmiRNAs,也就是最小的非蛋白质编码的RNAs,可以在转录后调节基因。
在各种生理疾病和病理疾病中都有表达。但越来越多的证据表明,这一点。
在包括阿尔茨海默病在内的几种常见的神经退行性疾病中,调节失调的MmiRNA信号转导系统起着非常重要的作用。
以及FTD。A基因是一种特异的miRNA,名为MmiR-132,此前曾被认为与神经元发育、可塑性、性别和生存能力有关。
最近出现的问题是,在前几个AD的早期阶段,以及FTD和,下调监管最明显的银行。
PSP。它可能与AD的病理有关,包括淀粉样斑块和tau形成的神经原纤维。
我们的研究数据表明,MmiR-132可以保护神经元免受与疾病相关的毒素的伤害,如抗体和。
谷氨酸及其替代物可能是大脑中的一种神经保护物质。许多与谷氨酸相关的基因与牛磺酸有关。
新陈代谢,以及那些对抗神经元和细胞凋亡机制的代谢,一直被预测为直接的MIR-
132是靶点。尽管如此,分子生物学机制是MmiR-132的主要神经保护作用的基础。
至于它的主要神经保护的遗传机制和生理环境,我们还不清楚。这项新项目的总体目标是什么。
为了更好地剖析MIR-132信号,定义其在AD信号和FTD神经元中的重要作用,我们需要研究和研究神经保护机制的特性。
其中,miRNA在人类干细胞和小鼠的淀粉样蛋白和Ttau诱导的神经变性模型中发挥作用。为了实现这一目标
在这一目标中,我们将提出三个具体的目标。一个具体的目标将不会定义人类的共同性和遗传基因的约束。
MIR-132介导的细胞信号转导和神经保护。使用新的神经元可以将细胞与一组来自iPSC的细胞系区分开来。
控制、AD控制和FTD患者,我们希望能够解开miR-132信号,实现其主要的控制目标,并为其独特的目标做出贡献。
导致神经退行性变和疾病的途径,和定义了miR-132蛋白活性、tau蛋白和淀粉样蛋白之间的主要联系。
病理、神经系统脆弱性和死亡。其特定的目标2将不会发展为临床前代谢稳定的疾病。
化合物将用于体内大脑中持续的MmiR-132b替换基因的最新研究。具体的研究目标将为3%。
在两种截然不同的小鼠神经变性模型中,研究MmiR-132神经保护基因的作用机制。
中国提出的这一项目承诺,将对中国监管失调的主要公共融资途径提出重要的新的中国见解。
阿尔茨海默病及其相关的神经病理学研究可能还会证实,miRNA是一种全新的神经保护性药物。
分子适用于AD和FTD的治疗。
英文摘要
Project Summary / Abstract
Alzheimer’s disease (AD) and Frontotemporal Dementia (FTD) are the most common neurodegenerative
disorders that lead to dementia in millions of patients. The number of people affected by these diseases and
the corresponding cost to society is predicted to double within 20 years. To develop effective therapies, new
biomedical approaches, concepts, and molecular targets are critically needed. The discovery of a novel class
of molecular regulators called microRNA (miRNA) has revolutionized biology and is predicted to have a major
impact on medicine. miRNAs, the small non-protein-coding RNAs, post-transcriptionally regulate gene
expression in various physiological and pathological conditions. Accumulating evidence suggests that
dysregulated miRNA signaling plays an important role in several neurodegenerative diseases, including AD
and FTD. A specific miRNA, miR-132, previously implicated in neuronal development, plasticity, and viability,
has recently emerged as the most significantly down-regulated in the early stages of AD, as well as FTD and
PSP. It is associated with the AD pathology, including both amyloid plaques and tau-formed neurofibrillary
tangles. Our data suggest that miR-132 protects neurons against disease-related toxins such as Ab and
glutamate and that its replacement might be neuroprotective in the brain. Many genes associated with tau
metabolism, as well as those antagonizing neuronal apoptotic machinery, have been predicted as direct miR-
132 targets. Nevertheless, the molecular mechanism underlying the neuroprotective properties of miR-132, as
well as the genetic and physiologic context of its neuroprotection, is unknown. The overall goal of this project is
to dissect miR-132 signaling, define its role in AD and FTD neurons, and investigate neuroprotective properties
of this miRNA in human cells and mouse models of amyloid and tau-induced neurodegeneration. To achieve
this goal, we propose three Specific Aims. Specific Aim 1 will define the commonality and genetic constraints of
miR-132-mediated signaling and neuroprotection. Using neurons differentiated from a panel of iPSC lines from
controls, AD and FTD patients, we will unravel miR-132 signaling, its primary targets contributing to distinct
paths to neurodegeneration and disease, and define the links between miR-132 activity, tau and amyloid
pathology, and neuronal vulnerability and death. Specific Aim 2 will develop pre-clinical metabolically stabilized
compounds for the investigation of sustained miR-132 replacement in the brain in vivo. Specific Aim 3 will
investigate the mechanisms of miR-132 neuroprotection in two distinct mouse models of neurodegeneration.
The proposed project promises to yield significant new insights into the common pathways dysregulated in
Alzheimer’s disease and related pathologies and may validate miRNA as a novel class of neuroprotective
molecules for AD and FTD therapies.
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