维生素C通过H3K9me3脱甲基化激活小鼠胚胎干细胞中的年轻LINE-1元素
Kevin C L Cheng1,2, Jennifer M Frost1, Francisco J Sánchez-Luque3
1Blizard Institute, Faculty of Medicine and Dentistry, QMUL, London, E1 2AT, UK.
Epigenetics & chromatin
|October 16, 2023
概括
维生素C (vitC) 通过减少H3K9me3,独立于TET酶,增加多能干细胞中的可转移元素 (TE) 表达. 在小鼠和人类细胞中LINE-1元素的表观遗传调节对细胞功能有潜在的影响.
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
- 基因组学就是基因组学.
背景情况:
- 维生素C (vitC) 增强表观遗传修饰剂,如TET酶和基因素脱甲基酶.
- 维生素C驱动的表观遗传重塑对于诱导和胚胎干细胞多能性至关重要.
- 维生素C对多能干细胞中可移植元素 (TE) 表达的影响尚不清楚.
研究的目的:
- 研究维生素C (vitC) 如何影响多能干细胞中可移植元素 (TE) 表达.
- 为了阐明底层的表观遗传机制vitC介导的TE调节.
- 评估由vitC引起的TE上调的潜在功能后果.
主要方法:
- 用vitC.治疗的小鼠胚胎干细胞 (ESC) 中TE表达的分析.
- 研究TET酶和基因组脱甲基酶 (KDM4A/C) 在vitC诱导的TE变化中的作用.
- 对LINE-1 (L1) 身体插入率的评估.
- 对人类ESC中L1蛋白水平的vitC影响的评估.
主要成果:
- 维生素C (vitC) 治疗可提高小鼠ESC中的各种TE家族的调节,包括LINE-1 (L1) 元素.
- L1上调独立于TET活性,并通过KDM4A/C基因组脱甲基酶的H3K9me3损失进行调节.
- 尽管L1表达增加,但vitC不会提高体内插入率;人类ESC通过转录后机制显示L1蛋白增加.
结论:
- 维生素C (vitC) 通过表观遗传机制直接调节小鼠L1和其他TE的表达.
- 这些发现突出了vitC在调节多能干细胞中TEs中的新作用.
- 通过vitC介导的TE调节对细胞功能的潜在下游影响需要进一步研究.
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