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Generation and characterization of a Cre-Lox regulated transgenic zebrafish model of SBMA

Cre-Lox 调节的 SBMA 转基因斑马鱼模型的生成和表征

基本信息

批准号：
10784254
负责人：
Heather L Montie
金额：
$ 15.16万
依托单位：
PHILADELPHIA COLLEGE OF OSTEOPATHIC MED
依托单位国家：
美国
项目类别：
财政年份：
2023
资助国家：
美国
起止时间：
2023-09-11 至 2025-08-31
项目状态：
未结题

来源：
https://reporter.nih.gov/project-details/10784254
关键词：
AR gene Actins Adult Affect Androgen Receptor Androgens Animals Biochemical Biological Assay Biology Birth Breeding CAG repeat Chemicals Clinical Trials Design Collaborations Complementary DNA Cre lox recombination system Cre-LoxP DNA Binding DNA cassette Data Dedications Dependence Disease DsRed Exhibits Female Functional disorder Funding Future Generations Genetic Genetic Recombination Genotype Glutamine Goals Heart Histology Hormone Receptor Human In Vitro Kennedy Syndrome Laboratories Length Libraries Ligand Binding Domain Ligands Limb structure Link LoxP-flanked allele Maintenance Microscopy Modeling Modification Molecular Motor Motor Activity Motor Neurons Movement Mus Muscle Weakness Muscular Atrophy National Institute of Neurological Disorders and Stroke Nerve Degeneration Neuroanatomy Neurodegenerative Disorders Neuromuscular Diseases Partner in relationship Pathogenesis Pathology Patients Pharmaceutical Preparations Phenotype Process Production Property Proteins Research Research Personnel Rodent Model Role Science Site Skeletal Muscle Specificity Speed Stanolone Structure Study models Swimming System Terminator Codon Therapeutic Therapeutic Intervention Time Tissues Transgenes Transgenic Organisms Translating Validation Vertebrates Zebrafish cell type cohort cost cost comparison human disease in vivo inducible Cre male men model organism molecular pathology motor deficit motor disorder mouse model muscle physiology neuromuscular patient population pharmacologic polyglutamine promoter receptor receptor expression receptor function spinal and bulbar muscular atrophy therapeutic development therapeutic target transgene expression

项目摘要

Spinal and bulbar muscular atrophy (SBMA or Kennedy's disease) is a slowly progressive, X-linked neuromuscular disease affecting men. It is caused by the expansion of a CAG repeat within the androgen receptor (AR) gene, encoding a glutamine tract in the protein. With no cure or therapy, identifying potential therapeutic interventions for this patient population is pressing. We aim to create a Cre-inducible, low cost, and high-throughput model of SBMA using zebrafish. Discoveries made from zebrafish research are highly translatable to humans since zebrafish are vertebrates with extensive structural homology to human neuroanatomy and muscle physiology. More specifically for SBMA patients, zebrafish express an AR that is highly homologous in structure and function to human AR. Cre-inducibility of the human AR transgene will enable the production of founder lines that are able to express high levels of the toxic polyglutamine-expanded AR. We hypothesize this will lead to robust motor dysfunction in larval zebrafish. These larval zebrafish modeling SBMA will be amenable to quick (over 1-2 weeks) chemical and drug library screens, or genetic modification(s) to identify modulators of motor function. Such assays could be set up within only a few days and at a very low cost compared to such assays in rodent models. Moreover, tissue specific Cre zebrafish lines can be crossed with these SBMA zebrafish in future studies to investigate the relative role of motor neurons verses skeletal muscle in the onset and progression of SBMA pathogenesis. A better understanding of the relative roles of each of these cell types in disease will support clinical trial design for SBMA patients. Further, because SBMA shares properties with other neurodegenerative, neuromuscular, and polyglutamine diseases, therapeutic targets identified in the SBMA zebrafish model may also be applicable to some of these other disorders.

脊髓延髓肌萎缩症（SBMA或肯尼迪病）是一种缓慢进行性，X连锁影响男性的神经肌肉疾病它是由雄激素内CAG重复序列的扩增引起的。受体（AR）基因，编码蛋白质中的谷氨酰胺段。在没有治愈或治疗的情况下，对这一患者群体的治疗干预是紧迫的。我们的目标是创造一个铬诱导，低成本，使用斑马鱼的SBMA的高通量模型。从斑马鱼研究中获得的发现是高度因为斑马鱼是与人类具有广泛结构同源性的脊椎动物，神经解剖学和肌肉生理学。更具体地说，对于SBMA患者，斑马鱼表达AR，在结构和功能上与人AR高度同源。人AR转基因的Cre诱导将使产生能够表达高水平的毒性聚谷氨酰胺扩增的AR的创始细胞系。我们假设这将导致斑马鱼幼鱼强健运动功能障碍。这些模拟SBMA的斑马鱼幼体将适合快速（超过1 - 2周）化学和药物库筛选，或遗传修饰，识别运动功能调节剂。这样的分析可以在短短几天内建立起来，而且成本非常低与啮齿动物模型中的此类测定相比。此外，组织特异性Cre斑马鱼系可以与这些SBMA斑马鱼在未来的研究，以调查运动神经元与骨骼肌的相对作用，在SBMA发病机制的发生和发展中的作用。更好地理解每一个的相对作用，疾病中的细胞类型将支持SBMA患者的临床试验设计。此外，由于SBMA共享房产与其他神经退行性疾病、神经肌肉疾病和多聚谷氨酰胺疾病， SBMA斑马鱼模型也可能适用于这些其他疾病中的一些。