Most human non-GCIMP glioblastoma subtypes evolve from a common proneural-like precursor glioma.

Most human non-GCIMP glioblastoma subtypes evolve from a common proneural-like precursor glioma.
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DOI:
10.1016/j.ccr.2014.06.005
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发表时间:
2014-08-11
期刊:
影响因子:
50.3
通讯作者:
Holland EC
Holland EC
中科院分区:
医学1区
文献类型:
--
作者:
Ozawa T;Riester M;Cheng YK;Huse JT;Squatrito M;Helmy K;Charles N;Michor F;Holland EC

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为了了解非GCIMP胶质母细胞瘤(GBM)亚组之间的关系,我们进行了数学建模,以预测肿瘤发生过程中驱动事件的时间序列。最常见的进化事件顺序是1)染色体(chr)7获得和chr 10丢失,其次是2)CDKN 2A丢失和/或TP 53突变,以及3)特定亚型的典型改变。然后,我们开发了一种计算方法来识别宽拷贝数变化的驱动因素,将PDGFA(chr 7)和PTEN(chr 10)识别为驱动初始非分离事件。这些预测使用小鼠模型进行验证,表明PDGFA足以诱导前神经样胶质瘤,并且额外的NF 1损失将前神经转化为间充质亚型。我们的研究结果表明,大多数非GCIMP间充质GBM产生,并从原神经样前体演变而来。
To understand the relationships between the non-GCIMP glioblastoma (GBM) subgroups, we performed mathematical modeling to predict the temporal sequence of driver events during tumorigenesis. The most common order of evolutionary events is 1) chromosome (chr) 7 gain and chr10 loss, followed by 2) CDKN2A loss and/or TP53 mutation, and 3) alterations canonical for specific subtypes. We then developed a computational methodology to identify drivers of broad copy number changes, identifying PDGFA (chr7) and PTEN (chr10) as driving initial non-disjunction events. These predictions were validated using mouse modeling, showing that PDGFA is sufficient to induce proneural-like gliomas, and additional NF1 loss converts proneural to the mesenchymal subtype. Our findings suggest most non-GCIMP-mesenchymal GBMs arise as, and evolve from, a proneural-like precursor.
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