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作 者:余升红[1] 丁峰[1] 王继成[1] 蒋玮莹[1]
机构地区:[1]中国广州中山大学基础医学院医学遗传教研室,510080
出 处:《中国优生与遗传杂志》2010年第3期22-25,共4页Chinese Journal of Birth Health & Heredity
基 金:国家自然科学基金(30571025);国家科技部基金(2006BAI05A08)
摘 要:目的(1)研究消除PCR反应非特异性扩增新技术。(2)研究全血直接PCR能否用于葡萄糖6-磷酸脱氢酶基因突变检测。方法(1)将新鲜全血混合基因组DNA进行PCR扩增,看全血能否抑制基因组DNA非特异性扩增,将新鲜人血清混合基因组DNA进行PCR扩增,看新鲜人血清能否抑制基因组DNA非特异性扩增。(2)将1μl全血加入PCR反应液,98℃变性后转入PCR循环,使用Taq(Fermentas)扩增G6PD基因外显子3-4,取扩增产物50μl进行DNA双向自动测序,使用ClustalX软件将测序结果与基因库中标准G6PD基因外显子3-4序列进行比对分析。结果(1)发现新鲜全血能抑制基因组DNA非特异性扩增,进一步研究发现是新鲜人血清抑制了基因组DNA非特异性扩增。(2)全血直接PCR加上DNA测序找到一例G6PD突变g.13503A>G。结论(1)新鲜人血清中存在PCR非特异性扩增抑制因子。(2)使用Taq DNA聚合酶(Fermentas)能进行全血直接PCR扩增,加上DNA测序可用于G6PD基因突变研究。Objective : ( 1 ) To investigate the new technology of eliminating PCR non - specific amplification. (2) To investi- gate whether whole blood direct PCR can be used in G6PD gene mutational detection. Methods: ( 1 ) To mix fresh whole blood with genomic DNA to proceed PCR amplification, to detect whether whole blood can inhibit genomic DNA non- specific amplification, to mix fresh human serum with genomic DNA to proceed PCR amplification, to detect whether fresh human serum can inhibit genomic DNA non - specific amplification. (2) To add 1μl whole blood into PCR liquid, after denaturing in 98% then turning to PCR cycling, using Taq (Fermentas) to ampli(y G6PD gene exort3 -4, using 50μl PCR products to proceed DNA two - direction autosequencing, using ClustalX software to compdre the PCR product sequence with standard G6PD exon3 - 4 sequence in gene bank. Results : ( 1 ) Discovering that fresh whole blood can inhibit genomic DNA non - specific amplification, additional investigation show that it is fresh human serum which inhibit genomic DNA non- specific amplification. (2) Using whole blood direct PCR and DNA sequencing the author find a G6PD mutation g. 13503A 〉 G. Conclusion: ( 1 ) There is PCR non - specific amplification inhibition factor in fresh human serum. (2) Whole blood direct PCR can be successfμlly proceed by Taq DNA polymerase (Fermentas), plus DNA sequen- cing it can be used in G6PD gene mutational research.
关 键 词:葡萄糖6-磷酸脱氢酶缺乏症 突变检测 PCR非特异性扩增抑制因子
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