Nature:可重启肿瘤抑制因子的新型非编码RNA

2013-10-12 佚名 手牵手博客站

日前,来自哈佛医学院等机构的科学家们发现了一种新型非编码 RNA,它能够"重启"癌细胞中被抑制的肿瘤抑制因子。相关研究论文刊登在了近期出版的《自然》(Nature)杂志上。 【原文下载】 该研究首次揭示了 DNA 甲基化过程中的关键酶 DNMT1( DNA methyl transferase 1)与 RNA 的关系,为治疗癌症等疾病开辟了新的道路。 DNA 甲基化过程能通过化学修饰 DNA

日前,来自哈佛医学院等机构的科学家们发现了一种新型非编码 RNA,它能够"重启"癌细胞中被抑制的肿瘤抑制因子。相关研究论文刊登在了近期出版的《自然》(Nature)杂志上。 【原文下载】 该研究首次揭示了 DNA 甲基化过程中的关键酶 DNMT1( DNA methyl transferase 1)与 RNA 的关系,为治疗癌症等疾病开辟了新的道路。 DNA 甲基化过程能通过化学修饰 DNA ,而不是影响 DNA 序列本身达到调控基因表达的作用。DNA 甲基化往往与基因沉默相关,在很多疾病中都有发现 DNA 甲基化现象。如在癌症中,癌细胞的抑癌基因就通过 DNA 甲基化而被抑制。 在这项研究在,科学家将焦点放在了一类特异影响抑癌基因 CEBPA 的非编码 RNA.CEBPA 沉默与急性骨髓性白血病,肺癌和其他类型癌症都相关。研究发现非编码 RNA 能够结合 DNMT1 从而防止 CEBPA 的甲基化。该原理有望能够"重启"被下调的抑癌因子,而该原理很可能在其他数千个基因中同样适用。 研究人员表示,新发现的非编码 RNA 能够特异的抑制 DNA 甲基化,引入 RNA 能够选择性的去甲基化

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    2014-05-09 liye789132251
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    2013-12-05 d830384
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