经常出现的致癌ZC3H18突变稳定了内源性逆转录病毒RNA
Tanzina Tanu1, Anna M Cox1, Jennifer Karlow2
1Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02115, USA.
bioRxiv : the preprint server for biology
|January 27, 2025
概括
ZC3H18 (Z18) 中的突变通过破坏核RNA监测来促进癌症,导致内源性逆转录病毒 (ERV) RNA积累增加. 这种ERVRNA积累加速了癌症的发展,突出了一个新的致癌机制.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 遗传学 是一个遗传学.
背景情况:
- 内源逆转录病毒 (ERV) RNA在癌症中高度表达,但其作用和潜在的分子机制尚不清楚.
- ZC3H18 (Z18) 是一种核RNA监测复杂组件,在癌症中观察到经常发生的截断突变.
- 癌症中Z18突变的致癌潜力和特定功能在很大程度上是未知的.
研究的目的:
- 研究ZC3H18 (Z18) 突变在癌症发展中的作用.
- 确定Z18突变影响内源逆转录病毒 (ERV) RNA水平的分子机制.
- 确定ERVRNA积累是否可以功能性地促进瘤发生.
主要方法:
- 在癌症患者数据和细胞系中分析ZC3H18 (Z18) 突变.
- 用斑马鱼模型进行功能研究,以评估Z18突变对黑色素瘤发病和ERVRNA水平的影响.
- 在体外实验中使用工程化人类黑色素瘤细胞来检查Z18与ERVRNA的相互作用.
- 斑马鱼瘤发生模型测试ERVRNA表达的功能作用.
主要成果:
- 在癌症中发现了ZC3H18 (Z18) 中的复发性截断突变,这些突变被发现是致癌的.
- Z18突变导致斑马鱼和人类癌症细胞系内源性逆转录病毒 (ERV) RNA的积累增加.
- Z18突变表现出主导负活性,直接结合和稳定ERVRNA.
- 仅仅ERVRNA的表达就足以在斑马鱼模型中加速瘤发生.
结论:
- ZC3H18 (Z18) 突变破坏了核RNA监测,导致瘤性ERVRNA积累.
- 异常积累的ERVRNA是癌症发展的功能性重要驱动因素.
- 这项研究揭示了一种新的机制,它将Z18突变,ERV RNA失调和瘤发生联系在一起.
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