相关实验视频

Updated: Jul 19, 2025

Analysis of LINE-1 Retrotransposition at the Single Nucleus Level

Analysis of LINE-1 Retrotransposition at the Single Nucleus Level

Published on: April 23, 2016

由延长因子ELL3标记的年轻LINE-1转位子5' UTRs作为增强剂,以调节胚胎干细胞中原始多能性

Siyan Meng^1,2, Xiaoxu Liu¹, Shiqi Zhu¹

¹Key Laboratory of Developmental Genes and Human Disease, School of Life Science and Technology, Southeast University, Nanjing, China.

Nature cell biology

|August 17, 2023

概括

年轻的LINE-1s (长间隔的核元素) 在早期胚胎中充当增强剂,受到ELL3.3的调节. ELL3控制基因表达和多能性,对小鼠胚胎发育至关重要.

科学领域:

分子生物学分子生物学
发展生物学发展生物学
基因组学就是基因组学.

背景情况:

尽管存在基因毒性风险,LINE-1s是主要的逆转移体,在早期胚胎中具有高活性.
特定LINE-1子集在胚胎基因调节中的作用尚未完全理解.

研究的目的:

研究小鼠胚胎干细胞中年轻LINE-1s,特别是L1Md_Ts的功能.
阐明ELL3在控制L1Md_T活动中的监管作用及其对发展的影响.

主要方法:

染色体免疫沉 (ChIP) 测试以确定与L1Md_Ts.Ts.结合的蛋白质.
RNA测序 (RNA-seq) 用于评估ELL3枯竭后的基因表达变化.
对表观遗传修饰 (5hmC,H3K27ac) 和信号通路 (ERK,AKT) 的分析.

主要成果:

年轻LINE-1s (L1Md_Ts) 的一个子集作为增强剂起作用,在小鼠胚胎干细胞中被ELL3标记.
ELL3 枯竭会改变 L1Md_Ts 的表观遗传场景,导致基因上调并影响 TET1 和 SIN3A 的结合.
ELL3抑制了Akt3内的L1Md_T增强剂,影响胚胎发育期间的ERK激活和多能性关闭.

结论:

ELL3控制特定的年轻LINE-1s (L1Md_Ts) 的增强功能.
这种调节对于转录,表观遗传修饰和小鼠早期胚胎发育的正确进展至关重要.
除了它们的逆转移活动之外,LINE-1s在发育基因调节中发挥着重要作用.

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RNA Next-Generation Sequencing and a Bioinformatics Pipeline to Identify Expressed LINE-1s at the Locus-Specific Level

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Published on: May 19, 2019

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