Identification of a CpG island methylator phenotype that defines a distinct subgroup of glioma.

Identification of a CpG island methylator phenotype that defines a distinct subgroup of glioma.
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DOI:
10.1016/j.ccr.2010.03.017
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发表时间:
2010-05-18
期刊:
影响因子:
50.3
通讯作者:
Cancer Genome Atlas Research Network
Cancer Genome Atlas Research Network
中科院分区:
医学1区
文献类型:
--
作者:
Noushmehr H;Weisenberger DJ;Diefes K;Phillips HS;Pujara K;Berman BP;Pan F;Pelloski CE;Sulman EP;Bhat KP;Verhaak RG;Hoadley KA;Hayes DN;Perou CM;Schmidt HK;Ding L;Wilson RK;Van Den Berg D;Shen H;Bengtsson H;Neuvial P;Cope LM;Buckley J;Herman JG;Baylin SB;Laird PW;Aldape K;Cancer Genome Atlas Research Network

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We have profiled promoter DNA methylation alterations in 272 glioblastoma tumors in the context of The Cancer Genome Atlas (TCGA). We found that a distinct subset of samples displays concerted hypermethylation at a large number of loci, indicating the existence of a glioma-CpG Island Methylator Phenotype (G-CIMP). We validated G-CIMP in a set of non-TCGA glioblastomas and low-grade gliomas. G-CIMP tumors belong to the Proneural subgroup, are more prevalent among low-grade gliomas, display distinct copy-number alterations and are tightly associated with IDH1 somatic mutations. Patients with G-CIMP tumors are younger at the time of diagnosis and experience significantly improved outcome. These findings identify G-CIMP as a distinct subset of human gliomas on molecular and clinical grounds.
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