Evidence for APOBEC3B mutagenesis in multiple human cancers.

Evidence for APOBEC3B mutagenesis in multiple human cancers.
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DOI:
10.1038/ng.2701
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发表时间:
2013-09
期刊:
影响因子:
30.8
通讯作者:
Harris, Reuben S.
Harris, Reuben S.
中科院分区:
生物学1区
文献类型:
--
作者:
Burns, Michael B.;Temiz, Nuri A.;Harris, Reuben S.

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在大多数人类癌症中会产生数千种体细胞突变,其原因在很大程度上是未知的。我们最近发现,DNA胞嘧啶脱氨酶APOBEC3B占表达这种酶的乳腺癌突变负荷的一半。在这里,我们解决了APOBEC3B是否广泛负责多种肿瘤类型的诱变。我们分析了19种不同癌症类型的基因表达数据和突变模式,分布和负荷,总计超过4,800个外显子和1,000,000个体细胞突变。值得注意的是,APOBEC3B是上调的,其优选的靶序列经常突变并聚集在至少6种不同的癌症中:膀胱癌、宫颈癌、肺癌(腺细胞和鳞状细胞)、头颈癌和乳腺癌。根据先前的遗传、细胞和生物化学研究进行解释,基于这些全球分析的最简约的结论是,APOBEC3B催化的基因组尿嘧啶病变是多种不同癌症中大部分分散和聚集突变的原因。
Thousands of somatic mutations accrue in most human cancers and causes are largely unknown. We recently showed that the DNA cytosine deaminase APOBEC3B accounts for up to half of the mutational load in breast carcinomas expressing this enzyme. Here, we address whether APOBEC3B is broadly responsible for mutagenesis in multiple tumor types. We analyzed gene expression data and mutation patterns, distributions, and loads for 19 different cancer types, totaling over 4,800 exomes and 1,000,000 somatic mutations. Remarkably, APOBEC3B is upregulated and its preferred target sequence is frequently mutated and clustered in at least 6 distinct cancers: bladder, cervix, lung (adeno- and squamous cell), head/neck, and breast. Interpreted in light of prior genetic, cellular, and biochemical studies, the most parsimonious conclusion based on these global analyses is that APOBEC3B catalyzed genomic uracil lesions are responsible for a large proportion of both dispersed and clustered mutations in multiple distinct cancers.
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