神经母细胞瘤中印记基因的改变甲基化:对预后改进的影响
Medha Suman1, Maja Löfgren1, Susanne Fransson2
1Sahlgrenska Center for Cancer Research, Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Medicinaregatan 1F, 405 30, Gothenburg, Sweden.
Journal of translational medicine
|August 31, 2024
概括
在印记区域的异常DNA甲基化在神经母细胞瘤 (NB) 中很常见. 像RB1和NNAT/BLCAP这样的印记基因中的特定甲基化变化可以预测患者的预后,为这种复杂的癌症提供潜在的新临床标志物.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 癌症基因组学 癌症基因组学
- 发展生物学 发展生物学
背景情况:
- 神经母细胞瘤 (NB) 是一种复杂的儿科癌症,对其潜在生物学了解有限.
- 基因组印记对于胎儿发育至关重要,在癌症中经常受到放松管制.
- 印记基因在NB病变发生中的作用是由于它们在发育中的重要性而被建议的.
研究的目的:
- 在神经母细胞瘤瘤中研究印制差异甲基化区域 (DMR) 中的DNA甲基化变化.
- 评估这些甲基化模式与患者存活率以及临床和基因组特征之间的关联.
- 为了将DNA甲基化与基因基因特异性拷贝数变化 (CNAs) 相对应,在NB.
主要方法:
- 在369个NB瘤中对49个印制的DMR进行DNA甲基化模式的分析.
- 统计评估甲基化变化与整体存活率和瘤特征的关联.
- 对DNA甲基化和等位基因特异性拷贝数改变 (CNAs) 的综合分析.
主要成果:
- 确定了几个印记区域在NB中具有异常甲基化,包括在NDN,SNRPN,IGF2,MAGEL2,HTR5A的甲基化损失和在NNAT,RB1,GPR1.1的甲基化增加.
- 在6种DMR (MIR886,RB1,NNAT/BLCAP,MAGEL2,MKRN3,INPP5F) 的异常甲基化与总生存率的降低显著相关.
- 在RB1,NNAT/BLCAP和MKRN3分层低风险NB瘤中的甲基化变化,以及在NNAT/BLCAP,MAGEL2和MIR886中的变化,独立于已确定的因素预测了风险.
结论:
- 在印记区域频繁异常甲基化发生在NB瘤中,几个区域显示独立的预后价值.
- 这些印记区域代表了潜在的临床表观遗传标记,用于识别具有不良预后的患者.
- 将甲基化状态与现有风险预测因子相结合,可以改善NB患者的预后.
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