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首页> 外文期刊>Cancer Cell >Epigenetic and genetic loss of Hic1 function accentuates the role of p53 in tumorigenesis.
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Epigenetic and genetic loss of Hic1 function accentuates the role of p53 in tumorigenesis.

机译:Hic1功能的表观遗传和遗传损失加剧了p53在肿瘤发生中的作用。

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摘要

The gene hypermethylated in cancer 1 (HIC1) is epigenetically inactivated, but not mutated, in cancer. Here we show that cooperative loss of Hic1 with p53, but not INK4a, yields distinct tumor phenotypes in mice. Germline deletion of one allele of each gene on the opposite chromosome yields breast and ovarian carcinomas and metastatic osteosarcomas with epigenetic inactivation of the wild-type Hic1 allele. Germline deletion of the two genes on the same chromosome results in earlier appearance and increased prevalence and aggressiveness of osteosarcomas with genetic deletion of both wild-type genes. In human osteosarcomas, hypermethylation of HIC1 is frequent only in tumors with p53 mutations. Our results indicate the importance of genes altered only through epigenetic mechanisms in cancer progression in conjunction with genetically modified tumor suppressor genes.
机译:在癌症1(HIC1)中高甲基化的基因在癌症中是表观遗传失活的,但没有突变。在这里,我们显示与p53,但不是INK4a,Hic1的合作损失在小鼠中产生不同的肿瘤表型。在相反的染色体上,每个基因的一个等位基因的种系删除会导致乳腺癌和卵巢癌以及转移性骨肉瘤,并伴随野生型Hic1等位基因的表观遗传失活。在同一条染色体上的两个基因的生殖系缺失导致较早出现,并且由于两个野生型基因的遗传缺失,导致骨肉瘤的患病率和侵袭性增加。在人类骨肉瘤中,HIC1的高甲基化仅在具有p53突变的肿瘤中频繁发生。我们的结果表明,仅通过表观遗传机制改变基因的重要性与基因修饰的肿瘤抑制基因一起在癌症进展中发挥了重要作用。

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