在脑瘤中合作性遗传景观的网络模型
Markus Bredel1, Denise M Scholtens, Griffith R Harsh
1Department of Neurological Surgery, Northwestern Brain Tumor Institute and Robert H. Lurie Comprehensive Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611-3015, USA. m-bredel@northwestern.edu
JAMA
|July 16, 2009
概括
质瘤表现出一种非随机的遗传景观,具有特定的染色体变异. 质母细胞瘤中关键网络基因的共同改变显著影响患者的生存,突出了质母细胞发生过程中独特的遗传情景.
科学领域:
- 神经瘤学神经瘤学
- 癌症基因组学 癌症基因组学
- 系统生物学 系统生物学
背景情况:
- 质瘤,包括质母细胞瘤,是具有攻击性的脑瘤,其特点是经常发生的染色体变化.
- 在质生成过程中这些变化的共同选择的生物学基础仍然是一个关键问题.
研究的目的:
- 开发一个网络模型的合作基因景观在质瘤.
- 评估这一遗传景观的临床相关性和预后影响.
主要方法:
- 分析了501名质瘤患者的多维基因组和临床资料.
- 鉴定具有一致变化的基因,相关的基因剂量/表达和功能相互作用.
- 确定基因和网络模型与患者生存数据的关联.
主要成果:
- 质瘤显示了一个非随机的遗传景观,具有特定的染色体变化区域 (1p,7,8q,9p,10,12q,13q,19q,20,22q).
- 一个网络模型揭示了这些区域内的基因之间的协同作用,促进瘤的关系.
- 基于7个景观基因 (POLD2,CYCS,MYC,AKR1C3,YME1L1,ANXA7,PDCD4) 的多基因风险评分与质母细胞瘤患者的整体存活率有显著相关性.
结论:
- 质瘤中经常出现的染色体异常通过合作机制去调节关键信号通路.
- 鉴定出的遗传景观很可能是在质生成过程中非随机选择的.
- 这些网络基因的变化与患者的预后有关,提供潜在的治疗点.
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