主导性恶性克隆 杆血统 限制表观基因组程序来驱动膜瘤的发展
bioRxiv : the preprint server for biology
|August 30, 2024
概括
儿科内膜瘤 (EPN) 转变是由ZFTA-RELA融合蛋白驱动的,其向特定的发育性脑细胞程序. 这些瘤蛋白在发育过程中劫持可访问的染色质,启动瘤生长并建立细胞层次结构.
科学领域:
- 神经瘤学神经瘤学
- 发育生物学是发展生物学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- ZFTA-RELA基因融合是儿科 supratentorial ependymoma (EPN) 中最常见的遗传变异.
- 这种融合蛋白足以在小鼠中启动瘤形成,但其在发育过程中的特定细胞点仍然不清楚.
研究的目的:
- 通过ZFTA-RELA识别特定的发育细胞系程序,这些程序面临转化风险.
- 调查发育性染色质可访问性在ZFTA-RELA驱动的膜瘤中的作用.
主要方法:
- 结合单细胞ATAC和RNA-seq (scMultiome) 分析正在发育的小鼠前脑和ZFTA-RELA驱动的小鼠和人类表皮瘤.
- 在体内追踪血统的研究.
主要成果:
- 由Plagl转录因子调节的放射性质细胞中的特定发育谱系程序容易发生瘤转变.
- 结合ZFTA-RELA会导致在特定位置持续的染色质可访问性和癌基因表达.
- 跨物种分析揭示了EPN中细胞类型的异质性,中间的祖先类细胞形成了瘤层次.
- 确定了主导性瘤克隆,驱动瘤生长并建立整个细胞层次.
结论:
- 发育表观基因组状态对于儿科表观基因瘤的融合蛋白驱动转化至关重要.
- 受染色体可访问性影响的独特的血统差异化程序决定了瘤转化风险.
- 早期的祖先样细胞建立了EPN瘤层次,反映了正常的神经分化.
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