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线粒体基编辑器的改变提高了小鼠模型生成的定向编辑效率

Seongho Hong^1,2,3, Sol Pin Kim^1,2, Sanghun Kim^4,3

¹Laboratory of Developmental Biology and Genomics, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea.

Molecular therapy. Nucleic acids

|September 2, 2025

概括

研究人员开发了增强的线粒体DNA基编辑器 (Hifi-sTALED和αnHifi-sTALED),以提高线粒体疾病的研究效率. 这些工具成功地产生了突变小鼠,显示出因突变而导致的线粒体功能受损.

科学领域:

分子生物学
遗传学
线粒体生物学

背景情况:

线粒体DNA (mtDNA) 基编辑器对于研究线粒体疾病至关重要.
目前的基准编辑器的编辑效率与mtDNA的目标站点有很大差异.
需要更高效和更具体的mtDNA编辑工具.

研究的目的:

开发具有提高效率的改进的线粒体腺基编辑器.
使用增强的基编辑器生成用于研究线粒体疾病的小鼠模型.
研究特定mtDNA突变的功能后果.

主要方法:

通过修改非脱氨酶组件,设计了两种新的线粒体基编辑器 (Hifi-sTALED和αnHifi-sTALED).
在转录组中测试了编辑效率和非目标效应.
在小鼠胚胎中使用增强的mtDNA编辑器来创建mt-Rnr1突变.
进行功能分析,包括ATP生产和氧消耗率 (OCR) 测定.

主要成果:

改进的Hifi-sTALED和αnHifi-sTALED编辑器显著提高了mtDNA编辑效率.
在转录组中观察到最小的脱效应.
成功生成了具有高异质体负荷的mt-Rnr1突变小鼠.
这种mt-Rnr1突变导致线粒体功能受损,由ATP和OCR的产生减少.

结论:

增强的Hifi-sTALED和αnHifi-sTALED基编辑器为mtDNA编辑提供了更高的效率和特异性.
这些工具在体内产生线粒体疾病模型时有效.
这项研究提供了mt-Rnr1突变对线粒体健康的功能影响.

关键词:

MT:RNA/DNA编辑时间表基础编辑线粒体线粒体编辑它们的 mtDNA

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