对人类黑色素瘤中复发的CDC20促进体变异的功能分析
Paula M Godoy1, Abimbola Oyedeji2,3, Jacqueline L Mudd2,3
1Division of Medical Oncology, Department of Medicine and Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO, USA.
Communications biology
|November 29, 2023
概括
研究人员在黑色素瘤中发现了新的功能性非编码变异,包括在CDC20促进器中. 这些变异改变基因表达,影响黑色素瘤细胞行为和瘤生长,提供潜在的新治疗点.
科学领域:
- 基因组学就是基因组学.
- 癌症生物学 癌症生物学
- 分子瘤学分子瘤学
背景情况:
- 非编码变体对黑色素瘤的遗传构造有着显著的贡献,超过99%的变异发生在这些区域.
- 虽然已知TERT促进器突变,但许多调节性非编码变体仍然在功能上没有特征.
- 了解这些变异对于破译黑色素瘤复杂的基因调节网络至关重要.
研究的目的:
- 在黑色素瘤特异性监管区域开发一条管道,用于识别反复突变的,假定功能性的非编码体质变异.
- 优先考虑和功能性地描述超出众所周知的TERT促进子突变的新型调控变异.
- 调查CDC20促进体变异对黑色素瘤表型的影响.
主要方法:
- 开发一个计算管道,以确定黑色素瘤基因组的非编码调节区域的突变热点.
- 利用记者测试来评估CDC20促进体变异对转录活性的影响.
- 在A375黑色素瘤细胞中采用CRISPR/Cas9基因编辑,以创建CDC20促进体,并分析下游效应.
- 分析了CDC20表达,细胞迁移,异种移植生长和转录状态的变化.
主要成果:
- 在黑色素瘤非编码区域中确定了数百个重要的突变热点,包括TERT促销者和CDC20促销者的新热点.
- 已经证明,CDC20促进体的变体会破坏ETS基因,从而降低转录活性.
- 由于CRISPR/Cas9诱导的CDC20促成体,导致CDC20表达的减少,细胞迁移的改变,异种移植的增长,以及转向更繁殖的转录状态的转变.
结论:
- 该研究成功地优先考虑了黑色素瘤中复发的功能性非编码变体.
- 这些变体对CDC20的下调会扰乱关键的黑色素瘤表型,包括扩散和迁移.
- 这些发现凸显了非编码变异在黑色素瘤发病过程中的重要性,并提出了针对CDC20的潜在治疗途径.
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