用荧光标记短串连重复复合扩增技术监测骨髓移植存活

目的探讨荧光标记短串联重复(STR)复合扩增技术监测骨髓移植存活的价值,为观测骨髓移植疗效提供可靠方法。方法用荧光标记引物对D12S391、D18S865、D20S161这3个STR位点进行PCR复合扩增,用ABI310遗传分析仪对扩增后产物进行分离和分型,并对56例移植后病人做移植物存活鉴定检测。结果有52例移植后病人的3个STR位点的分型完全表现供者源性,与受者移植前不同;4例表现为供/受体干细胞混合嵌合状态。结论荧光标记STR复合扩增体系特异性强,成本低,个体识别力高,检测灵敏、快速、简便,结合临床判断可作为骨髓移植效果评定的有力指标。

Application of multiplex amplification of STRs for monitoring survival of engraftment after bone marrow transplantation

Objective To evaluate the application of fluorescent multiplex amplification of short tandem repeat(STR)for monitoring survival of engraftment after bone marrow transplantation(BMT).Methods Three STR loci named D12S391,D18S865 and D20S161 in 56 cases were detected by fluorescent multiplex amplification.PCR products were separated and typed by DNA Sequencer.Results The genotypes of STR in 52 recipient after bone marrow transplantation were completely identical with those of the donors.In another 4 cases the evidences of mixed chimerism were observed.Conclusion The system of fluorescent multiplex amplification of STRs exhibited high capacity of discrimination and low cost.Its application in the detection of STR after BMT is reliable,sensitive and simple.Combined with the clinical manifestation it can be used to evaluate the effect of BMT.