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肌肉特异性增加JAG1的表达改善了dystrophin缺乏小鼠的骨肌肉表型

Felipe de Souza Leite¹, Matthias R Lambert¹, Tracy Yuanfan Zhang¹

¹Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA 02115.

Proceedings of the National Academy of Sciences of the United States of America

|September 23, 2025

概括

过度表达Jagged-1 (JAG1) 在杜申肌缩症 (DMD) 鼠标模型中显著改善了肌肉大小和强度. 这种基因修饰剂通过增强肌肉再生和功能,为DMD提供了一个有前途的补充治疗策略.

科学领域:

肌肉再生和基因疗法.
杜恩肌肉发育不良 (DMD) 研究研究
分子生物学和蛋白质组学

背景情况:

杜申肌肉衰竭 (DMD) 需要多方面的治疗策略.
正在探索增强肌肉再生的基因修饰剂.
之前的研究表明,Jagged-1 (JAG1) 在肌肉发育不良的犬类和斑马鱼模型中表达过度的好处.

研究的目的:

为了研究JAG1过度表达在缺肌肉中的生物机制.
创建和分析一个新的转基因小鼠模型 (mdx-5cv-JAG1) 用于DMD研究.
评估JAG1过度表达对肌肉功能和细胞组成的影响.

主要方法:

生成一种转基因的mdx^5cv-JAG1小鼠模型,过度表达人类的JAG1.
从mdx^5cv-JAG1和对照mdx^5cv小鼠1,4和12个月的骨肌肉的比较分析.
量化JAG1表达水平和蛋白质组分析,包括dysferlin和Nsd1.

主要成果:

与对照小鼠相比,mdx^5cv-JAG1小鼠的JAG1表达是对照小鼠的3-5倍.
mdx^5cv-JAG1小鼠表现出明显更大,更强壮的肌肉,肌纤维数量增加.
蛋白质组学揭示了提升的迪斯费林水平,并确定了与基因组甲基转移酶Nsd1.1.的关联.

结论:

过度表达JAG1在肌肉衰竭的肌肉中显示出积极的治疗效果.
mdx^5cv-JAG1小鼠模型对于研究JAG1在DMD中的作用是有价值的.
准JAG1可能是杜氏肌肉发育不良症治疗的可行补充方法.

关键词:

杜申尼肌肉发育不良症是什么贾格德-1 的第一名.基因修饰剂是一种基因修饰剂.鼠标模型鼠标模型鼠标模型生理学生理学身体学

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