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表观遗传学甲基化的方法在无创性产前诊断中的应用

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摘要 表观遗传是指DNA序列不发生变化但基因表达却发生了可遗传的改变,即基因型未发生变化而表型却发生了改变,且这种改变在发育和细胞增殖过程中能稳定传递。DNA甲基化是最常见的表观遗传修饰方式,DNA甲基化是在DNA甲基化转移酶(DNMTs)的作用下使CpG二核昔酸5’端的胞嘧啶转变为5甲基胞嘧啶,它并不改变基因序列,而是通过甲基化或去甲基化控制相应基因的时间、空间特异性表达。近年来,DNA甲基化检测技术有了很大的发展和完善,将其应用领域扩大到非创伤性产前诊断中,本文就表观遗传学在无创性产前诊断中的应用进展加以综述。
作者 许烨烨 丛林
出处 《安徽医学》 2013年第7期1037-1040,共4页 Anhui Medical Journal
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