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在单细胞分辨率下诱导天真的人类多能性的过程中追踪和减轻印记删除

Laura A Fischer¹, Brittany Meyer¹, Monica Reyes²

¹Department of Developmental Biology and Center of Regenerative Medicine, Washington University School of Medicine, St. Louis, MO, USA.

Stem cell reports

|February 14, 2025

概括

研究人员开发了一个活细胞记者来跟踪人类多能干细胞 (hPSC) 重置期间的表观遗传印记. 发现涉及MEK/ERK抑制和ZFP57过度表达的策略可以保护印记,为体外研究提供一种工具.

科学领域:

表观遗传学在表观遗传学中,表观遗传学是指表观遗传学.
干细胞生物学干细胞生物学
发展生物学发展生物学

背景情况:

纯粹的人类多能干细胞 (hPSCs) 建模了植入前表皮质细胞.
在原始的hPSC中,父特异性表观遗传标记 (印记) 的侵蚀是与体内表观细胞的关键差异.
了解hPSC状态转换期间的印记动态对于发育生物学研究至关重要.

研究的目的:

开发一种实时方法,用于跟踪在hPSCs的天真重置期间的印记删除.
评估化学和遗传策略,以尽量减少印记在这个过程中的擦除.
建立一个工具,以提高印记稳定性在体外.

主要方法:

在印制的SNRPN位点建立了一个双色光报道器,用于活细胞跟踪.
在初始化至原始化的hPSC重置期间监控SNRPN表达动态.
评估了改变MEK/ERK抑制和ZFP57过度表达对印记稳定性的影响.

主要成果:

在天真重置期间,SNRPN表达变得双,并在重新启动时保持不可逆转.
减少MEK/ERK抑制或ZFP57过度表达部分受保护的印记.
与单一策略相比,组合策略提供了更好的印记保护.

结论:

一个新的活细胞报告器可以实时监控hPSC中的印记删除.
特定的化学和遗传干预可以减轻在天真重置期间的印记损失.
这项工作提供了一种工具,用于改善在体外培养的hPSC中的印记稳定性.

关键词:

通过DNA甲基化.在FGF的信号传输.这就是SNRPN.ZFP57 ZFP57 是一个印记是为了印记.一个天真的多能性.干细胞是干细胞的组成部分.

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