Nat Commun:拷贝数而非表观遗传改变是肿瘤印记甲基化的关键

2017-09-24 MedSci MedSci原创

既往研究认为印记畸变在肿瘤中十分常见。为了了解印记在癌症发生发展中的作用,研究人员对280多个癌细胞株的拷贝数和甲基化进行了表征,并在原发性肿瘤中证实了研究人员的发现。印迹差异甲基化区域(DMR)以顺式调节相邻转录物亲本来源的单等位基因的表达。与可能易于发生高甲基化的单拷贝CpG岛不同,印记的DMRs可能在肿瘤发生过程中松动或增加甲基化。本研究中,研究人员发现,印记的DMR的甲基化谱通常不代表真正

既往研究认为印记畸变在肿瘤中十分常见。为了了解印记在癌症发生发展中的作用,研究人员对280多个癌细胞株的拷贝数和甲基化进行了表征,并在原发性肿瘤中证实了研究人员的发现。

印迹差异甲基化区域(DMR)以顺式调节相邻转录物亲本来源的单等位基因的表达。与可能易于发生高甲基化的单拷贝CpG岛不同,印记的DMRs可能在肿瘤发生过程中松动或增加甲基化。本研究中,研究人员发现,印记的DMR的甲基化谱通常不代表真正的表观遗传变化,而仅仅是潜在的拷贝数像差(CNA)的积累,且独立于从癌症易感基因座推断出的基因组甲基化状态。

总之,该研究结果表明,随着拷贝中性杂合性缺失或扩增CNA也可影响等位基因表达,表明印迹的维持,尽管通过RNA FISH并没有观察到作为单个表达点。

原始出处:


Alex Martin-Trujillo, Enrique Vidal, et al., Copy number rather than epigenetic alterations are the major dictator of imprinted methylation in tumors. Nat Commun. 2017; 8: 467. Published online 2017 Sep 7. doi: 10.1038/s41467-017-00639-9

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    2018-03-16 liuli5079
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    2017-10-09 liye789132251
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    2017-09-25 luominglian113

    学习了.谢谢分享

    0

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    2017-09-24 清风拂面

    谢谢分享.学习了

    0

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    2017-09-24 Y—xianghai

    学习了新知识

    0

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    2017-09-24 1ddf0692m34(暂无匿称)

    学习了.涨知识

    0

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