实时荧光定量PCR检测急性髓系白血病患者WT1基因表达及其临床意义

目的：应用实时荧光定量PCR（real time quantitative PCR,RQ-PCR）检测WT1基因表达水平,探讨其在监测白血病微小残留病（minimal residual disease,MRD）中的临床意义。方法：采用RQ-PCR检测70例急性髓系白血病（AML）患者、20例正常对照者骨髓细胞WTl基因拷贝数及内参基因（ABL）拷贝数,以NQ比值=WTl基因拷贝数/内参基因拷贝数计算基因表达水平。结果：初诊组与复发组WT1表达水平分别与完全缓解组及对照组比较差异均有统计学意义（P〈0.01）,而对照组与完全缓解组之间比较及初诊与复发组之间比较差异无统计学意义（P〉0.05）,即初诊急性白血病患者WT1表达水平明显高于完全缓解组及对照组,复发时同样高于完全缓解组及对照组。在初诊的各种白血病亚型中,M3亚型WT1表达水平最高（平均值为3.44）,M5亚型WT1表达水平最低（平均值为0.25）。4例短期随访提示在达到完全缓解时WT1表达水平下降,而复发时再次升高。结论：用RQ-PCR测定WT1基因的表达,可以作为白血病MRD的一项监测指标。

expression of WT1 gene by real time quantitative PCR and its clinical significance in acute myeloid leukemia patients

Objective: To evaluate the expression of WT1 gene by the real time quanti-tative PCR and its clinical significance in AML patients.Methods: A rea1 time quantitative polymerase chain reaction(RQ-PCR) method was established for detecting WT1 and internal reference ABL gene expression level in 70 AML patients and 20 normal controls.NQ was determined as the ratio between WT1 expression and ABL expression.Results: Significant difference was found between newly diagnosed group,relapsed group and the complete remi...