慢性髓系白血病实时定量PCR检测的Bcr-Abl水平与临床状态关系的分析  被引量:4

Analysis of Relationship between bcr-abl Transcription Level Detected by Real-time Quantitative Polymerase Chain Reaction and Clinical Status of CML Patients

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作  者:王国蓉[1,2] 于珍[1] 赵耀中[1] 李增军[1] 李长虹[1] 钱林生[1] 邱录贵[1] 

机构地区:[1]中国医学科学院,北京协和医学院血液学研究所,血液病医院,实验血液学国家重点实验室,天津300020 [2]首都医科大学附属北京朝阳医院血液科,北京100020

出  处:《中国实验血液学杂志》2009年第4期861-865,共5页Journal of Experimental Hematology

基  金:天津市科技发展计划项目(编号05YFSZSF02400);天津市自然科学基金资助项目(编号06YFJMSC08500)

摘  要:本研究分析bcr-abl阳性慢性髓系白血病患者实时定量PCR检测的转录本水平与临床状态的关系,以便为根据bcr-abl转录本水平的绝对值合理预测患者状态提供一些基础。采用实时定量PCR方法检测30例初诊慢性髓系白血病患者治疗前骨髓标本的bcr-abl/abl比值(%),分析获得bcr-abl阳性患者bcr-abl/abl的基线值;再检测82例患者不同时间点161份骨髓标本,比较各标本的bcr-abl/abl值相对于基线值的水平以及与该时间点患者的临床状态的关系。结果表明,初诊患者治疗前bcr-abl/abl(%)值呈正偏态分布,变异范围较大:中位值13.5631(1.0206-98.3159),算术平均值21.1491(95%CI:12.3532-29.9450),为严格判断治疗后的相对变化,因此用以参比的bcr-abl/abl(%)基线值确定为低限值,即1。在161例次标本中,bcr-abl/abl(%)高于基线值(≥1)的有33例次,其中耐药/复发/病情进展的13例次(39.4%,13/33),治疗后未缓解/尚未缓解的17例次(51.5%,17/33),完全血液学缓解的3例次(9.1%,3/33);较基线值下降0-1数量级(0.1≤bcr-abl/abl%<1)的有26例次,其中耐药/复发/病情进展的6例次(23.1%,6/26),治疗后未缓解/尚未缓解的7例次(26.9%,7/26),完全血液学缓解的7例次(26.9%,7/26),遗传学缓解的6例次(23.1%,6/26);较基线值下降1-2数量级(0.01≤bcr-abl/abl%<0.1)的19例次,其中治疗后未缓解/尚未缓解的2例次(10.5%,2/19),完全血液学缓解的3例次(15.8%,3/19),遗传学缓解(CyR)的14例次(73.7%,14/19);较基线值下降2-3数量级(0.001≤bcr-abl/abl%<0.01)的7例次,其中主要遗传学缓解(MCyR)的2例次(28.6%,2/7),完全遗传学缓解(CCyR)的5例次(71.4%,5/7);较基线值下降3个数量级以上(bcr-abl/abl%<0.001)的76例次,均为CCyR。结论:利用单次检测值较基线值下降的程度能较好判断患者该时点的临床状态;bcr-abl/abl%<0.01能可靠地反映患者获得CyR,而bcr-abl/abl%<0.001能反映患者获得CCyR。然而,患者疾病状态的判断仍以动态连续检测为�This study was aimed to investigate the bcr-abl transcription level and its relationship with the clinical status of patients so as to provide some bases for predicting patient status according to absolute value of bcr-abl transcript. The bcr-abl/abl values ( % ) of bone marrow samples from 30 newly diagnosed CML patients at the baseiline bcr-abl/abl value obtained in CML patients with bcr-abl positive were defined, then 161 bone marrow samples from 82 patients were detected at varions time points, and the bcr-abl/abl value of each sample was compared with baseline value and its relatienship with clinical status of patient at same time point was investigated. The results showed that bcr-abl/abl values (%) of 30 patients showed positive skew distribution and a large variation with mean 13. 5631 (1. 0206 -98. 3159) and mathematical mean of 21. 1491 (95% C1 : 12.3532 -29.9450). For strict standard, the baseline value of bcr-abl/abl (%) was set as 1, the lower limit of these values. In the detected results of 161 samples, there were 33 samples' values above the baseline value, in which resistance/relapse/ progression (R/R/P) 13 (39.4%, 13/33), no remission(NR) 17 (51.5%, 17/33)and complete hematologic remission (CHR) 3 (9. 1% ,3/33) were observed, the values of 26 samples decreased by 0 - 1 order of magnitude (0. 1 ≤bcr-abl/abl % 〈 1 ), in which R/R/P 6 (23.1% ,6/26), NR 7 (26.9% ,7/ 26), CHR 7 (26.9% ,7/26) and cytogenetic remission (CyR) 6 (23.1% ,6/26) were observed, the values of 19 samples decreased by 1 - 2 order of magnitude (0.01 ≤ bcr-abl/abl % 〈 0.1 ), in which NR 2 ( 10.5 % ,2/19), CHR 3 ( 15.8%, 3/19) and CyR 14 (73.7% ,14/19) were determined. 7 samples decreased by 2 -3 order of magnitude (0.001 ≤bcr-abl/ abl % 〈0.01) in which major CyR (MCyR) 2 (28.6% ,2/7) and complete CyR (CCyR) 5 (71.4% ,5/7) were determined, the values of 76 samples decreased by 3 or more order of magnitude (bcr-

关 键 词:实时定量PCR bcr—abl 慢性髓系白血病 临床状态 

分 类 号:R733.72[医药卫生—肿瘤] Q503[医药卫生—临床医学]

 

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