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通过针对性等位基因特异性DNA甲基化开发超特异性表观基因组编辑

Nivethika Rajaram¹, Alexandra G Kouroukli², Susanne Bens²

¹Institute of Biochemistry and Technical Biochemistry, Department of Biochemistry, University of Stuttgart, Allmandring 31, 70569, Stuttgart, Germany.

Epigenetics & chromatin

|October 20, 2023

概括

这项研究证明了基因基因特异性DNA甲基化 (ASM) 对于精确的表观基因组编辑. 这种技术可以选择性地使突变的等位基因沉默,为主导遗传疾病提供一种潜在的治疗策略,副作用最小.

科学领域:

分子生物学分子生物学
表观遗传学在表观遗传学中,表观遗传学是指表观遗传学.
基因治疗基因治疗

背景情况:

表观基因组编辑涉及对基因组位置的有针对性的重编程.
同位基因特异性DNA甲基化 (ASM) 精确地准甲基化的一个等位基因.
这种方法可以调节基因表达,有可能用于疾病治疗.

研究的目的:

开发和优化基因特异性DNA甲基化 (ASM) 以实现向基因沉默.
为了实现高特异性和高效率的DNA甲基化传递到单个等位基因.
探索ASM对于主导遗传疾病的治疗潜力.

主要方法:

在HEK293细胞中设计了24个sgRNA,针对HEK293细胞中的14个基因位点中的单个等位基因.
利用sgRNA/dCas9复合体来招募DNMT3A/3L进行向的DNA甲基化.
在低甲基化CGI促进体中具有异构性SNP的选定目标区域用于等位基因歧视.

主要成果:

在多个基因位点实现了有效的ASM,包括ISG15,MSH6和GPD1L.
在目标等位基因和>50%绝对差异上证明了5-10倍更强的DNA甲基化.
当SNP位于sgRNA的PAM区域时,观察到更高的ASM成功率和特异性.
在长达11天的时间里表现出稳定的ASM,导致显著的基表达比率变化.

结论:

在多个基因组位点成功建立ASM,具有高特异性,效率和稳定性.
这种表观基因组编辑策略显示出对治疗主导突变疾病的希望.
ASM 能够使突变性等位基因沉默,同时保持正常的等位基因功能,最大限度地减少副作用.

关键词:

艾勒勒歧视是一种歧视.在 DNMT3A/3L 中使用.在表观基因组编辑.具体性具体性具体性有针对性的DNA甲基化.dCas9 的使用情况

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