五引物单管聚合酶链反应（PCR）扩增法快速测定人CYP2D610等位基因的类型  

An Efficient Approach to Human CYP2D6*10 Allele-specific Typing by Polymerase Chain Reaction with Five Primers in a Single Tube

作　　者：卜莹 张晓丹 马涛 周国华 

机构地区：[1]华东医学生物技术研究所,南京210002

出　　处：《分析化学》2005年第2期155-160,共6页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金资助项目(No.30270368)

摘　　要：以人CYP2D6 10等位基因位点为研究对象,建立了一种由5条引物同时PCR扩增在单管中进行等 位基因快速检测的新方法。该方法在等位基因特异性扩增法的基础上,在内引物3′端引入了一个人工错配 碱基并在5′端附加一段“尾巴”作为引物的锚定部分,使扩增反应的特异性得到了提高。本实验所建立的方 法可在单管中同时完成SNP3种可能等位基因类型的快速检测。实测了47份样品的CYP2D6 10等位基因 的类型,并随机对其中20份样品的测定结果用RFLP法进行了验证,结果完全一致。结果表明本法简便、快 速,结果准确。An accurate and effective method was developed for rapidly genotyping in a single tube, which was based on di-allele-specific amplification with artificially modified primers. With human CYP2D6 * 10 as an example, five primers were designed for polymerase chain reaction ( PCR) amplification, where two outer primers were used for amplifying deoxyribonucleic acid (DNA) fragments containing SNP point, and two inner primers were single nucleotide polymorphism ( SNP) -specific primers. The fifth primer which was composed of base G and C is used to increase allele-specific amplification. The specificity of amplification was enhanced by introducing an artificially mismatched base into the 3' end area of the inner primers as well as adding a tail on its 5' end as an anchor primer. The templates were amplified in one tube by five primers and the genotype was determined by the length of extended products separated by gel electrophoresis. The PCR amplification conditions including the types of Taq polymerase, the position for introducing the artificially mismatched base, as well as the concentration ratio between primer's pair were also optimized. The developed method was successfully applied to type CYP2D6 * 10 in 47 samples. The typing results of 20 randomly selected genome samples were the same as those by PCR-RFLP. The method is simple, accurate and easy-to-operate, by which the three possible SNP types can be rapidly determined in a single tube at a time.

关 键 词：等位基因 CYP2D6 扩增 特异性 引物 快速检测 聚合酶链反应(PCR) 尾巴 位点 RFLP 

分 类 号：R346[医药卫生—基础医学]