实时定量反转录聚合酶链反应检测患儿急性粒细胞性白血病1-ETO融合基因的临床意义

Clinical Value of Acute Myeloblastic Leukemia 1-ETO Fusion Transcripts in Children with Acute Myeloblastic Leukemia by Using Real-Time Quantitative Reverse Transcriptase Polymerase Chain Reaction

目的分析实时定量RT-PCR在检测急性粒细胞性白血病（AML）1-ETO融合基因阳性AML微小残留病中的临床意义。方法对2000年1月-2007年1月收治的32例AML1-ETO阳性AML患儿进行实时定量RT-PCR检测。诱导化疗结束后及在巩固化疗阶段每1.5-2.0个月行AML1-ETO融合基因定量检测。使用Kaplan-Meier法分析不同融合基因水平患儿生存率。采用SPSS10.0软件进行统计学分析。结果共32例患儿进行诱导化疗,其中29例（90.625%）达到形态学完全缓解,3例形态学未缓解后放弃。达到分子生物学缓解患儿有更高的无瘤生存率（P=0.0018）。AML1-ETO高拷贝数组生存率低于低拷贝数组（P=0.1080）。诱导缓解化疗结束后AML1-ETO定量结果示〉10^-3组生存率低于定量〈10^-3组生存率（P=0.0230）。化疗6个月时AML1-ETO定量结果示〉10^-3组生存率高于定量〈10^-3组生存率（P=0.0001）。巩固化疗结束时AML1-ETO定量〉10^-5组生存率低于定量〈10^-5组生存率（P=0.0049）。结论定量评估AML1-ETO阳性的小儿AML微小残留病十分重要,有可能对治疗方案的选择提供重要信息。

Objective To analyze the clinical value of minimal residual disease（MRD） of acute myeloblastic leukemia（AML） with AML 1-ETO by using the real-time quantitative reverse transcriptase polymerase chain reaction（RQ-RT-PCR）.Methods From Jan.2001 to Jan.2007,the MRD of 32 AML1-ETO-positive AML patients were analyzed by using PQ-RT-PCR.The detection of the AML1-ETO was taken after the induced chemotherapy every 1.5-2.0 months during the consolidation therapy.The survival of different stages in children with AML was analyzed by SPSS 10.0 software and calculated by using Kaplan-Meier analysis.Results Thirty-two patients received the induced chemotherapy and 29 patients with complete remission morphologically,3 patients had no complete remission morphologically and then gave up.Patients with molecular remission were associated with a high probability of survival（P=0.001 8）.Patients with high transcript levels at diagnosis had no difference in event free survival with patients with low transcript levels.The quality of molecular response after induction,6 months in the chemotherapy as well as consolidation period,has significant impact on the event free survival（P=0.023,0.000 1,0.004 9）.Conclusion The current study demonstrate that quantitative evaluation of AML1-ETO transcript levels is important and may be helpful for therapeutic decisions in future.