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通过基于CRISPR的表观基因组编辑激活印记的普拉德-威利综合征位点

Dahlia Rohm¹, Joshua B Black¹, Sean R McCutcheon¹

¹Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA; Center for Advanced Genomic Technologies, Duke University, Durham, NC 27708, USA.

|February 13, 2025

概括

表观基因组编辑可以在普拉德-威利综合征 (PWS) 中重新编程沉默基因. 向DNA脱甲基化通过激活母体SNRPN基因,为PWS提供了一种稳定的治疗方法.

科学领域:

基因组医学是一种基因组医学.
表观遗传学在表观遗传学中,表观遗传学是指表观遗传学.
基因调节基因调节

背景情况:

普拉德-威利综合征 (PWS) 是由于15号染色体上父性表达基因的丧失引起的,而母性等位基因在表观遗传学上被沉默.
像CRISPR-dCas9这样的表观基因组编辑工具,为剖析基因调节和治疗遗传疾病提供了潜在的潜力.

研究的目的:

通过使用CRISPR屏幕,识别控制PWS中SNRPN基因表达的基因组元素.
探索针对性的表观遗传重编程策略,以激活PWS中沉默的母性SNRPN等位基因.

主要方法:

在人类诱导多能干细胞 (iPSC) 中进行了CRISPR抑制和激活幕.
使用有针对性的转录激活和DNA脱甲基化来调节SNRPN表达.
进行了转录变异和表观遗传重编程机制的分析.

主要成果:

确定了控制父亲和母亲SNRPN表达的基因组元素.
转录激活和DNA脱甲基化都成功激活了母体SNRPN和下游PWS转录.
基因脱甲基化导致PWS iPSCs中稳定,长期的母性SNRPN表达.

结论:

有针对性的表观遗传操纵可以重新编程与疾病相关的印记位置.
通过稳定激活母体SNRPN等位基因,DNA去甲基化为普拉德-威利综合征提供了一个有前途的治疗策略.

关键词:

克里斯普尔是什么意思?克里斯普尔是什么意思?通过DNA甲基化.普拉德-威利综合征是什么意思 dCas9 的使用情况编辑表观基因组编辑印记是为了印记.

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