Nature2014-06-26 1:38 PM

关于宫颈癌的一项全基因组筛查 Landscape of genomic alterations in cervical carcinomas

论文摘要 

为了给造成宫颈癌的基因组异常提供一个概览,本文作者对115对“宫颈癌-正常人”、79个宫颈癌样本的转录组序列和来自14对“宫颈癌-正常人”的全基因组进行了全外显子组测序和分析。这些分析将MAPK1、HLA-B 和ELF3 识别为新的严重突变的基因,并且提供了证明“人乳头瘤病毒”(HPV)的整合是宫颈癌中目标基因过度表达的一个普遍机制的证据。这些结果还为鳞状细胞癌和腺癌的突变情况提供了一个对比。

Abstract 

Cervical cancer is responsible for 10–15% of cancer-related deaths in women worldwide. The aetiological role of infection with high-risk human papilloma viruses (HPVs) in cervical carcinomas is well established. Previous studies have also implicated somatic mutations in PIK3CA, PTEN, TP53, STK11 and KRAS as well as several copy-number alterations in the pathogenesis of cervical carcinomas. Here we report whole-exome sequencing analysis of 115 cervical carcinoma–normal paired samples, transcriptome sequencing of 79 cases and whole-genome sequencing of 14 tumour–normal pairs. Previously unknown somatic mutations in 79 primary squamous cell carcinomas include recurrent E322K substitutions in the MAPK1 gene (8%), inactivating mutations in the HLA-B gene (9%), and mutations in EP300 (16%), FBXW7 (15%), NFE2L2 (4%), TP53 (5%) and ERBB2 (6%). We also observe somatic ELF3 (13%) and CBFB (8%) mutations in 24 adenocarcinomas. Squamous cell carcinomas have higher frequencies of somatic nucleotide substitutions occurring at cytosines preceded by thymines (Tp*C sites) than adenocarcinomas. Gene expression levels at HPV integration sites were statistically significantly higher in tumours with HPV integration compared with expression of the same genes in tumours without viral integration at the same site. These data demonstrate several recurrent genomic alterations in cervical carcinomas that suggest new strategies to combat this disease.

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