在原始胚胎干细胞中TASOR表达保护了它们的发育潜力
Carlos A Pinzon-Arteaga1, Ryan O'Hara2, Alice Mazzagatti3
1Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Howard Hughes Medical Institute, Department of Cell Biology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.
Cell reports
|October 25, 2024
概括
转基因激活抑制剂 (TASOR) 在多能性过渡期间对细胞存活至关重要. 它的损失会引发复制压力和由于不受控制的可转移元素而引起的免疫反应,影响干细胞的发育.
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
- 分子生物学分子生物学
背景情况:
- 多能性转换需要精确调节转录因子和表观遗传机制.
- 人类沉默枢纽 (HUSH) 综合体在维持基因组稳定性方面发挥着作用.
- LINE-1 (L1) 逆转移子是移动的遗传元素,必须使其保持沉默,以防止基因组不稳定.
研究的目的:
- 研究转基因激活抑制剂 (TASOR) 在从原始多能性过渡到原始多能性过渡期间维持细胞活力的作用.
- 了解在TASOR损失时观察到的细胞死亡背后的分子机制.
- 为了确定潜在的治疗点,在多能性过渡期间保护干细胞功能.
主要方法:
- 使用的多能干细胞 (PSCs) 有或没有TASOR.
- 评估了复制应激,H3K9me3异色素水平和L1元素沉默.
- 研究了酶抑制和MAVS删除对细胞存活的影响.
- 分析了天生的免疫信号通路的作用.
主要成果:
- 在天真的PSC中,TASOR损失诱导了复制应激和破坏了H3K9me3异色素.
- 观察到LINE-1 (L1) 可转移元件的沉默功能受损,在原始化PSC中效应加剧.
- 在Tasor淘汰赛PSC中,通过抑制caspase或删除MAVS来挽救脱离天真多能性的细胞死亡.
- 非计划的L1表达激活了先天的免疫反应,导致细胞死亡.
结论:
- 在从原始多能性过渡到原始多能性过渡期间,TASOR对于细胞活力至关重要.
- 通过TASOR和HUSH复合物的表观遗传调节对于沉默L1元素和防止异常免疫激活至关重要.
- 这些发现强调了天真多能性中已建立的表观遗传程序对于正常干细胞发育和生存的重要性.
关键词:
5mC 5mC 的时间.科普:干细胞研究通过DNA甲基化.H3K9me3是什么意思 H3K9me3是什么意思胡什 (Hush) 复合体是一个复杂的复合体.L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1 L2 L1 L1 L1 L1 L1 L1 L2 L1 L1 L2 L2 L2 L2 L2 L3 L2 L2 L3 L2 L3 L4 L5 L5 L6 L6 L7 L8 L9线路-1 线路-1 在线干细胞是一种干细胞.塔索尔 (Tasor) 是一个名字.异性染色是一种异性染色.一个天真的多能性.预备中的多能性.相关概念视频
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