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评估基因替代策略的可行性,以治疗MTRFR缺乏症

Samia L Pratt^1,2, Mariana Zarate-Mendez³, Lidiia Koludarova⁴

¹The Jackson Laboratory, Bar Harbor, ME 04609, USA.

Disease models & mechanisms

|June 2, 2025

概括

使用线粒体翻译释放因子 (MTRFR) 的基因替代疗法在救援中显示出对MTRFR缺乏的承诺. 引入功能性MTRFR纠正的细胞和动物模型,建议一个可行的治疗策略.

科学领域:

分子生物学分子生物学
遗传学是一个遗传学.
细胞生物学细胞生物学

背景情况:

线粒体翻译释放因子在救援 (MTRFR) 对于线粒体中蛋白质合成终止至关重要.
致病性MTRFR变异导致功能丧失突变,导致MTRFR缺乏.
基因替代被探索为遗传疾病的治疗策略.

研究的目的:

为了评估MTRFR缺陷的基因替代疗法.
在体内和体外评估MTRFR表达的安全性和有效性.
为了确定MTRFR过度表达或截断的变异是否导致毒性.

主要方法:

产生了一个具有截断MTRFR突变 (K155*) 的小鼠模型.
创建了表达野生类型人类MTRFR或部分功能变异的转基因小鼠.
利用AAV9-介导的输送来纠正人类诱导多能干细胞 (hiPSC) 衍生神经元中的MTRFR.

主要成果:

同性卵性K155*小鼠表现出胚胎致死性;异性卵性小鼠是正常的.
野生类型的MTRFR转基因完全挽救的K155*同卵性小鼠.
部分功能性MTRFR转基因显示的救援效率较低.
在体内,MTRFR表达没有引起毒性,即使过度表达.
由hiPSC衍生的神经元中的线粒体表型通过MTRFR递送得到纠正.

结论:

用功能性MTRFR替代基因是一种潜在的有效治疗MTRFR缺乏症.
无论是MTRFR过度表达还是截断的MTRFR变体都没有在体内显示出毒性.
在老鼠和hiPSC模型中,MTRFR表达成功地纠正了疾病表型.

关键词:

在C12ORF65中,它是C12ORF65的.贝尔综合征 (Behr's Syndrome) 是一种表现为 CMT6 CMT6 CMT6 CMT6 CMT6 CMT6 CMT6 CMT6 CMT6 CMT6 CMT6 CMT6 CMT6 CMT6 CMT6 CMT6 李氏综合征是李氏综合征的一种症状.在 MRPL58 里,你会得到 MRPL58.线粒体翻译是指线粒体的翻译.

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