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针对主导性遗传性听力损失的基因组化人性化小鼠模型的理性设计,DFNA9

Dorien Verdoodt¹, Erwin van Wijk², Sanne Broekman²

¹Department of Translational Neurosciences, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium; Laboratory of Experimental Hematology, Vaccine and Infectious Disease Institute (Vaxinfectio), University of Antwerp, Antwerp, Belgium.

Hearing research

|January 13, 2024

概括

研究人员通过修改COCH基因,为DFNA9听力损失创造了一个人性化的小鼠模型. 这种新模型准确地反映了人类的遗传学,使得研究针对这种疾病的向疗法成为可能.

科学领域:

遗传学是一个遗传学.
耳鼻喉科耳鼻喉科耳鼻喉科
分子生物学分子生物学

背景情况:

DFNA9是一种遗传性听力障碍,由COCH基因突变引起,该基因编码可林蛋白.
开发有效的基因疗法需要准确的临床前模型,反映人类疾病遗传学.

研究的目的:

在COCH基因中为DFNA9荷兰/比利时创始人突变建立一个基因组化人性化的小鼠模型.
为了减轻与将人类遗传序列引入小鼠相关的风险,并确保适当的基因功能和拼接.

主要方法:

通过与人类的COCH序列交换小鼠科赫前列3-6的基因组化人性化小鼠模型.
优化了人类的COCH外子用于小鼠拼接机械,并将人类特异性氨基酸转化为小鼠等价物.
与C57BL/6 Cdh23 Cdh753A小鼠进行杂交的人化科奇小鼠,以标准化遗传背景.

主要成果:

成功建立了人性化的科奇小鼠,在内耳中正确拼接了野生类型和突变的人性化科奇等位基因.
人化科奇小鼠在9个月时表现出正常的听力值,与野生类型对照相比,表明成功的人化和基因背景纠正.
该模型证明了引入人类遗传信息的可行性,同时最大限度地减少对科林功能的不良影响.

结论:

开发的 Coch 人化的小鼠模型准确地代表了人类的 DFNA9 基因,适合研究特定序列的基因疗法.
这种方法最大限度地降低了与基因组人性化相关的风险,为听觉研究提供了有价值的工具.
目前正在进行长期研究,以充分描述模型的听觉和平衡功能随着时间的推移.

关键词:

DFNA9 DFNA9 的意思是遗传修饰是一种基因改造.听力损失听力损失人性化的小鼠模型在mRNA前拼接.

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