全球染色体重组和调节在分化和癌症期间具有特定进化年龄的基因
Flavien Raynal1, Kaustav Sengupta2,3,4, Dariusz Plewczynski2,3
1CRCT, Université de Toulouse, Inserm, CNRS, Université Toulouse III-Paul Sabatier, Centre de Recherches en Cancérologie de Toulouse, 31100 Toulouse, France.
Nucleic acids research
|February 18, 2025
概括
癌细胞通过改变表观基因组机制来重新编程基因调节. 古代基因被激活,而新基因在瘤发生过程中被沉默,影响细胞适应.
科学领域:
- 基因组学就是基因组学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 进化生物学 进化生物学
背景情况:
- 癌细胞表现出可塑性,适应环境变化.
- 基因进化年龄与癌症表达变化相关:古老基因上调,元动物基因失活.
- 驱动这些与年龄相关的表达变化的机制在很大程度上是未知的.
研究的目的:
- 根据基因的进化年龄来研究调节基因的表观基因机制.
- 在不同的细胞类型和条件中描述表观基因组景观,基因表达和染色质组织.
- 探索这些模式如何在分化和瘤发生过程中发生变化.
主要方法:
- 利用了进化基因年龄数据.
- 分析了人类胚胎干细胞,B细胞 (正常和白血病) 和结直肠癌中的表观基因地貌,基因表达和染色质组织.
- 检查了Polycomb抑制和RNA聚合酶II暂停模式.
主要成果:
- 在分化过程中识别了染色质组织的拓变化,包括Polycomb抑制和RNA聚合酶II暂停.
- 在瘤发生过程中观察到这些模式的逆转.
- 在3D表观基因组中发现了基因和染色质特征的非随机组织.
- 由特定因素介导的古老,中间和最近的基因之间的偏好相互作用.
结论:
- 基因调节受进化年龄的影响.
- 染色体组织和表观基因组机制在分化和瘤发生过程中发生动态变化.
- 这些发现提供了关于癌症发展中的古老基因与最近基因调节的见解.
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