复合扩增微卫星DNA在脐血移植监测中的应用

Validation of multiplex microsatellite DNA amplification system for use in monitoring umbilical cord blood cell transplantation

目的 观察荧光标记复合扩增微卫星在脐血移植监测中应用的可行性。方法 采用检测微卫星DNA的方法 ,对 6例脐血移植的受者进行移植监测。 15个微卫星DNA用荧光标记引物复合扩增技术和DNA自动测序仪进行分型 ,比较受者移植前后或供者的DNA图谱 ,观察受者移植后DNA图谱的变化。结果 所有受者和供者均具有不同的DNA分型图谱。本组受者移植后的转归状态分为 3种 :只检测出受者基因型的受者型 ;只检测出供者基因型的供者型 ;同时检测出受者和供者基因型的嵌合型。结论 用复合扩增多个微卫星技术进行脐血移植监测 ,即使没有受者移植前或是供者的标本作比对 ,仍然可分析受者移植前后微卫星分型的变化。

Objective To study the validation of fluorescent multiplex microsatellite amplification technique for use in the caseworks of umbilical blood cell transplantation monitor. Methods Six post-transplant recipients of umbilical cord blood cell transplantation were monitored by analyzing microsatellite DNA loci. DNA samples were amplified using a fluorescent labeling primers multiplex amplification system of 15 microsatellites markers, followed by typing on a DNA automated sequencer. Recipients' or donors' microsatellites DNA profiles were compared before and after transplantation. Results All recipients and donors exhibited different DNA profiles. Without reference samples of pre-transplant or donors, the changes of the 15 microsetellites genotypes of the post-transplant recipients still could be analyzed. The recipient type turned to donor type was observed over time. Conclusion Under the condition of using multiplex amplification of the 15 microsatellites to monitor the umbilical blood cell transplantation, reference sample of pre-transplant or donor did not need to be detected simultaneously.