Clinica Chimica Acta:利用改进的野生型阻断剂可在单管中敏感、选择性地检测密码子12和13 KRAS突变

2019-09-13 gladiator MedSci原创

据推测,在WTB-PCR系统中,与DNA聚合酶的热力学驱动力相关的较多循环导致在扩增子中人工引入突变核苷酸。

据推测,在WTB-PCR系统中,与DNA聚合酶的热力学驱动力相关的较多循环导致在扩增子中人工引入突变核苷酸。在目前的研究中,科学家开发了通用的WTB-PCR以克服这些限制,其中使用了两种策略:在WTB寡核苷酸的5'-末端碱基处进行硫代磷酸酯修饰,以及引用的内部阳性控制剂(RIPC)片段的扩增。结果表明,通用WTB-PCR可以检测具有更高选择性(即0.01%)的单拷贝KRAS突变体等位基因,并且具有更高的消除KRAS野生型等位基因的非特异性扩增的能力。此外,引入的内部阳性对照(RIPC)片段的引入防止了由样品DNA的量不足引起的假阴性结果,并允许定量分析每个FFPE样品中的突变水平。在来自mCRC患者的50FFPE组织切片样品​​临床应用中,70%(35/50)KRAS基因编码子1213发生了不同的突变;而采用传统PCR方法,在不添加WTB寡核苷酸的情况下,可检出30%0(15/50)。总之,WTB-PCR是一种快速、简便、廉价的检测mCRC患者低丰度KRAS突变的方法。

原始出处:

Ning SuKun WeiSensitive and selective detections of codon 12 and 13 KRAS mutations in a single tube using modified wild-type blocker

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    2020-03-29 windight
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    2019-09-15 bioon7

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