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在多能细胞中通过合成CpG-free ssDNA插入进行工程CpG岛DNA甲基化

Joshua Tompkins¹, Elizabeth Lizhar¹, Alireza Shokrani¹

¹Department of Diabetes Complications and Metabolism, Diabetes and Metabolism Research Institute, City of Hope, Duarte, CA 91010, USA.

Cell reports methods

|June 16, 2023

概括

科学家们在干细胞中开发了一种DNA甲基化工程方法. 这种方法稳定地将DNA甲基化扩展到目标CpG岛屿,为表观遗传研究和疾病建模提供了新的工具.

科学领域:

表观遗传学和分子生物学
发展生物学发展生物学
癌症生物学癌症生物学

背景情况:

细胞分化涉及DNA甲基化 (DNAme) 的显著改变.
基因甲基化在调节基因表达,染色质结构和基因组稳定性方面发挥着至关重要的作用.
了解和操纵DNAme是控制细胞身份和疾病过程的关键.

研究的目的:

在多能干细胞 (PSC) 中开发一种新且稳定的DNA甲基化工程方法.
调查DNA甲基化在特定CpG岛屿 (CGI) 的有针对性的扩展.
建立新的表观遗传模型来研究发育和疾病.

主要方法:

在PSC中整合无CpG合成单链DNA (ssDNA).
在目标位置诱导CpG岛甲基化反应 (CIMR).
在分化细胞中分析DNAme模式,基因表达 (例如MLH1) 和细胞反应 (例如思丁敏感性).

主要成果:

在ssDNA集成成功诱导稳定的CIMR在各种PSC线和小鼠PSC.
在MLH1位点的CIMRDNAme跨越了CGI,通过差异化保持,并抑制了MLH1的表达.
工程甲基化使差异化细胞 (心肌细胞,胸膜上皮细胞) 对西斯普拉丁敏感,与CIMP+癌症系不同.

结论:

这种DNAme工程方法为多能性的向表观遗传修饰提供了一个强大的工具.
这种方法有助于创建稳定的表观遗传状态和用于发育和疾病研究的新型细胞模型.
这些发现突出了用于治疗和研究应用的干细胞中DNA甲基化精确控制的潜力.

关键词:

一个CG岛屿CG岛屿这就是Cas9的情况.通过DNA甲基化.欧洲经济委员会ESC ESC MLH1 一个问题在P53中,P53是P53 这是心肌细胞 (cardiomyocyte).编辑表观遗传学编辑多能干细胞是一种多能干细胞.胸膜上皮细胞的皮质细胞.

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