Methylation-specific MLPA (MS-MLPA): simultaneous detection of CpG methylation and copy number changes of up to 40 sequences.

Methylation-specific MLPA (MS-MLPA): simultaneous detection of CpG methylation and copy number changes of up to 40 sequences.
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DOI:
10.1093/nar/gni127
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发表时间:
2005-08-16
影响因子:
14.9
通讯作者:
Errami A
Errami A
中科院分区:
生物学2区
文献类型:
--
作者:
Nygren AO;Ameziane N;Duarte HM;Vijzelaar RN;Waisfisz Q;Hess CJ;Schouten JP;Errami A

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各种基因的拷贝数变化和CpG甲基化是肿瘤发展的标志,但尚未广泛用于诊断环境。最近开发的多重连接依赖探针扩增(MLPA)方法增加了在常规实验室中多重检测基因拷贝数畸变的可能性。在这里,我们描述了一种新的强大的方法:甲基化特异性MLPA(MS-MLPA),可以在一个简单的反应中检测CpG甲基化以及多达40个染色体序列的拷贝数的变化。在MS-MLPA中,MLPA探针寡核苷酸的连接与用甲基化敏感性核酸内切酶消化基因组DNA-探针杂交复合物相结合。基因组DNA-探针复合物的消化,而不是双链基因组DNA,允许使用来自福尔马林处理的石蜡包埋的组织样品的DNA,使得能够进行回顾性研究。为了验证这种新方法,我们使用MS-MLPA检测Prader-Willy综合征、Angelman综合征或急性髓性白血病患者DNA样本中的异常甲基化。
Copy number changes and CpG methylation of various genes are hallmarks of tumor development but are not yet widely used in diagnostic settings. The recently developed multiplex ligation-dependent probe amplification (MLPA) method has increased the possibilities for multiplex detection of gene copy number aberrations in a routine laboratory. Here we describe a novel robust method: the methylation-specific MLPA (MS-MLPA) that can detect changes in both CpG methylation as well as copy number of up to 40 chromosomal sequences in a simple reaction. In MS-MLPA, the ligation of MLPA probe oligonucleotides is combined with digestion of the genomic DNA–probe hybrid complexes with methylation-sensitive endonucleases. Digestion of the genomic DNA–probe complex, rather than double-stranded genomic DNA, allowed the use of DNA derived from the formalin treated paraffin-embedded tissue samples, enabling retrospective studies. To validate this novel method, we used MS-MLPA to detect aberrant methylation in DNA samples of patients with Prader–Willy syndrome, Angelman syndrome or acute myeloid leukemia.
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