H3K9的翻译后修饰调节了子母细胞囊中的表皮质/原始内皮特异性
Wilhelm Bouchereau1, Hong-Thu Pham1, Worawalan Samruan1,2
1Univ Lyon, Université Lyon 1, INSERM, Stem Cell and Brain Research Institute U1208, INRAE USC 1361, Bron, F-69500, France.
Epigenetics & chromatin
|January 12, 2025
概括
在 lysine 9 中的 histone H3 修饰调节了哺乳动物胚胎囊中的细胞命运. 在早期发育过程中,H3K9乙化和甲基化的变化对于原始内皮分离和表皮质扩张至关重要.
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.
- 发展生物学 发展生物学
- 哺乳动物胚胎发生
背景情况:
- 在氨酸9上基素H3的翻译后修饰,包括乙化 (H3K9ac) 和三甲基化 (H3K9me3),是染色质可访问性的关键调节者.
- 这些基因组修饰在哺乳动物胚胎细胞系分离中的特定作用尚不清楚.
研究的目的:
- 调查子胚胎细胞发育过程中,组织蛋白H3氨酸9修饰的动态变化和功能意义.
- 为了阐明H3K9ac,H3K9me2和H3K9me3在内部细胞质谱的分离中的参与.
主要方法:
- 在子胚胎囊腔化和扩张过程中对H3K9ac,H3K9me2和H3K9me3水平的定量分析.
- 药理上抑制和增强H3K9甲基化和乙化通路.
- 评估与多能性和血统确定有关的基因表达.
主要成果:
- 在子母细胞扩张过程中,H3K9me2和H3K9me3水平下降,H3K9me3在胃化前增加之前,在内细胞质细胞中显著低.
- H3K9ac在早期的胚芽细胞中很丰富,但在细胞内质量转移到表质细胞的过程中减少.
- 抑制H3K9me2/3会破坏原始内皮分离,而增强的H3K9ac会促进表皮质在原始内皮形成上的扩张.
结论:
- 在H3K9甲基化和乙化中的动态变化对于调节哺乳动物胚胎囊中的血统分离至关重要.
- 这些表观遗传修饰影响了参与多能性和细胞命运决定的基因的表达,突出了它们在胚胎发育中的重要性.
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