RESUMEN
Clear cell renal cell carcinoma (ccRCC) is the most common form of adult kidney cancer, characterized by the presence of inactivating mutations in the VHL gene in most cases, and by infrequent somatic mutations in known cancer genes. To determine further the genetics of ccRCC, we have sequenced 101 cases through 3,544 protein-coding genes. Here we report the identification of inactivating mutations in two genes encoding enzymes involved in histone modification-SETD2, a histone H3 lysine 36 methyltransferase, and JARID1C (also known as KDM5C), a histone H3 lysine 4 demethylase-as well as mutations in the histone H3 lysine 27 demethylase, UTX (KMD6A), that we recently reported. The results highlight the role of mutations in components of the chromatin modification machinery in human cancer. Furthermore, NF2 mutations were found in non-VHL mutated ccRCC, and several other probable cancer genes were identified. These results indicate that substantial genetic heterogeneity exists in a cancer type dominated by mutations in a single gene, and that systematic screens will be key to fully determining the somatic genetic architecture of cancer.
Asunto(s)
Carcinoma de Células Renales/genética , Genes de la Neurofibromatosis 2 , N-Metiltransferasa de Histona-Lisina/genética , Histonas/metabolismo , Neoplasias Renales/genética , Proteínas Nucleares/genética , Oxidorreductasas N-Desmetilantes/genética , Carcinoma de Células Renales/patología , Hipoxia de la Célula/genética , Cromatina/metabolismo , Regulación Neoplásica de la Expresión Génica , Histona Demetilasas , Humanos , Neoplasias Renales/patología , Mutación/genética , Análisis de Secuencia de ADNRESUMEN
Large-scale systematic resequencing has been proposed as the key future strategy for the discovery of rare, disease-causing sequence variants across the spectrum of human complex disease. We have sequenced the coding exons of the X chromosome in 208 families with X-linked mental retardation (XLMR), the largest direct screen for constitutional disease-causing mutations thus far reported. The screen has discovered nine genes implicated in XLMR, including SYP, ZNF711 and CASK reported here, confirming the power of this strategy. The study has, however, also highlighted issues confronting whole-genome sequencing screens, including the observation that loss of function of 1% or more of X-chromosome genes is compatible with apparently normal existence.
Asunto(s)
Cromosomas Humanos X/genética , Exones/genética , Discapacidad Intelectual Ligada al Cromosoma X/genética , Análisis de Secuencia de ADN/métodos , Mapeo Cromosómico , Femenino , Variación Genética , Humanos , Masculino , LinajeRESUMEN
Somatically acquired epigenetic changes are present in many cancers. Epigenetic regulation is maintained via post-translational modifications of core histones. Here, we describe inactivating somatic mutations in the histone lysine demethylase gene UTX, pointing to histone H3 lysine methylation deregulation in multiple tumor types. UTX reintroduction into cancer cells with inactivating UTX mutations resulted in slowing of proliferation and marked transcriptional changes. These data identify UTX as a new human cancer gene.