A transcriptional network signature characterizes lung cancer subtypes.
A transcriptional network signature characterizes lung cancer subtypes.
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DOI:
10.1002/cncr.25592
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发表时间:
2011-01-15
期刊:
影响因子:
6.2
通讯作者:
Ramoni, Marco F.
中科院分区:
文献类型:
--
作者:
Chang, Hsun-Hsien;Dreyfuss, Jonathan M.;Ramoni, Marco F.
Transcriptional networks play a central role in cancer development. Here we describe a systems biology approach to cancer classification based on the reverse engineering of the transcriptional network surrounding the two most common types of lung cancer: adenocarcinomas (AC) and squamous cell carcinomas (SCC). A transcriptional network classifier is inferred from the molecular profiles of 111 human lung carcinomas. We tested its classification accuracy in seven independent cohorts, for a total of 422 subjects of Caucasian, African and Asian descent. The model for distinguishing AC from SCC is a 25-gene network signature. Its performance on the seven independent cohorts achieves 95.2% classification accuracy. Even more surprisingly, 95% of this accuracy is explained by the interplay of three genes (KRT6A, KRT6B, KRT6C) on a narrow cytoband of chromosome 12. The role of this chromosomal region in distinguishing AC and SCC was further confirmed by the analysis of another group of 28 independent subjects assayed by DNA copy number changes. The copy number variations of bands 12q12, 12q13, and 12q12-13 discriminates these samples with 84% accuracy. These results suggest the existence of a robust signature localized in a relatively small area of the genome, and show the clinical potential of reverse engineering transcriptional networks from molecular profiles.
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