表观遗传调节者的功能映射揭示了由HBO1和MLL1复合体协调的瘤抑制
bioRxiv : the preprint server for biology
|September 4, 2024
概括
研究人员确定了新的表观遗传调节剂,HBO1和MLL1复合体,对于抑制肺癌至关重要. 这些复合物控制基因表达和染色质可访问性,为肺腺癌提供新的治疗点.
科学领域:
- 在瘤学瘤学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
背景情况:
- 在癌症中表观遗传改变是常见的,但驱动癌症的特定调节者仍然不清楚.
- 了解表观遗传驱动因素对于开发向癌症疗法至关重要.
研究的目的:
- 通过使用高通量体内屏幕,识别参与KRAS驱动的肺瘤发生的新型表观遗传调节剂.
- 阐明已识别的表观遗传调节器在肺癌发育和进展中的功能作用.
主要方法:
- 利用一种新的,可扩展的,高通量体内功能查方法.
- 选了250多个表观遗传调节基因在本土的瘤性KRAS驱动的肺瘤.
- 在已识别的复合体中分析了基因组修饰,染色质可访问性和基因表达.
主要成果:
- 确定了新的表观遗传瘤抑制和瘤依赖基因.
- 发现HBO1复合体和MLL1复合体是肺癌中关键的瘤抑制表观遗传调节剂.
- 在人类肺腺癌中,由HBO1复合体产生的组素修饰减少.
- HBO1和MLL1复合体调节染色体的可访问性,血统忠实性和瘤抑制基因表达.
- 这些复合体在肺瘤发生过程中是表皮性,在人类癌症细胞系中具有功能相关性.
结论:
- 定量体内查提供了瘤发生中的表观遗传调节者的表型路线图.
- HBO1和MLL1复合体代表了肺腺癌的有前途的治疗点.
- 这些复合物的表观遗传失调在肺癌进展中起着重要作用.
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