多重巢式RT-PCR技术在急性髓系白血病中的应用

 目的　探讨急性髓系白血病（AML）染色体畸变所形成的融合基因与MICM分型及临床诊断、治疗、预后的关系。方法　采用多重巢式RT-PCR方法对60例AML患者的融合基因联合染色体核型、免疫表型、临床资料进行研究。结果　60例AML中有37例（61.67 %）具有5种融合基因：MLL-AF9、TLS-ERG、CBFβ-MYH1、AML1-ETO、PML-RARα。13例患者有HOX11原癌基因活化,10例为单纯表达HOX11原癌基因活化,3例同时伴有其他融合基因表达。伴AML1-ETO、PML-RARα的31例患者中接受化疗的23例全部达完全缓解（CR）,且无复发。结论　基因分型是AML最精确的分型方法,可为临床化疗提供指导。采用多重巢式RT-PCR方法可快速同时检测急性白血病29种染色体畸变所形成的融合基因,完善白血病的MICM分型,指导临床个体化治疗。     

多重巢式RT-PCR技术在急性髓系白血病中的应用

Objective To analyse the fusion genes derived from chromosome structural aberrations in acute myeloid leukemia(AML) and the relationship between fusion genes and the MICM classification, clinical diagnosis, chemotherapy and prognosis. Methods The expression of fusion gene in bone marrow samples was detected with multiplex RT-PCR technique and chromosome karyotypes, immunological phenotypes and clinical data were analyzed in 60 acute myeloid leukemia newly diagnosed. Results 37 cases(61.67 %) of 60 patients carried 5 kinds of fusion genes consisting of MLL-AF9, TLS-ERG, CBFβ-MYH1, AML1-ETO and PML-RARα. The activation of oncogene HOX11 was detected in 13 AML cases, three of them with other chromosome aberration simultaneously.23 cases of 31 patients carrying AML1-ETO or PML-RARα, reached complete remission(CR) after chemotherapy and without relapse. Conclusion Gene typing is the most precise classification method that can direct clinical treatment and evaluate prognosis. Multiplex RT-PCR technique, which can quickly screen 29 kinds of fusion gene derived from chromosome structural aberrations at one time, maybe helpful to improve M1CM classification and guide the choice of treatment.     

多重巢式RT-PCR技术在急性髓系白血病中的应用

Objective To analyse the fusion genes derived from chromosome structural aberrations in acute myeloid leukemia(AML) and the relationship between fusion genes and the MICM classification, clinical diagnosis, chemotherapy and prognosis. Methods The expression of fusion gene in bone marrow samples was detected with multiplex RT-PCR technique and chromosome karyotypes, immunological phenotypes and clinical data were analyzed in 60 acute myeloid leukemia newly diagnosed. Results 37 cases(61.67 %) of 60 patients carried 5 kinds of fusion genes consisting of MLL-AF9, TLS-ERG, CBFβ-MYH1, AML1-ETO and PML-RARα. The activation of oncogene HOX11 was detected in 13 AML cases, three of them with other chromosome aberration simultaneously.23 cases of 31 patients carrying AML1-ETO or PML-RARα, reached complete remission(CR) after chemotherapy and without relapse. Conclusion Gene typing is the most precise classification method that can direct clinical treatment and evaluate prognosis. Multiplex RT-PCR technique, which can quickly screen 29 kinds of fusion gene derived from chromosome structural aberrations at one time, maybe helpful to improve M1CM classification and guide the choice of treatment.     

多重巢式RT-PCR技术在急性髓系白血病中的应用

Objective To analyse the fusion genes derived from chromosome structural aberrations in acute myeloid leukemia(AML) and the relationship between fusion genes and the MICM classification, clinical diagnosis, chemotherapy and prognosis. Methods The expression of fusion gene in bone marrow samples was detected with multiplex RT-PCR technique and chromosome karyotypes, immunological phenotypes and clinical data were analyzed in 60 acute myeloid leukemia newly diagnosed. Results 37 cases(61.67 %) of 60 patients carried 5 kinds of fusion genes consisting of MLL-AF9, TLS-ERG, CBFβ-MYH1, AML1-ETO and PML-RARα. The activation of oncogene HOX11 was detected in 13 AML cases, three of them with other chromosome aberration simultaneously.23 cases of 31 patients carrying AML1-ETO or PML-RARα, reached complete remission(CR) after chemotherapy and without relapse. Conclusion Gene typing is the most precise classification method that can direct clinical treatment and evaluate prognosis. Multiplex RT-PCR technique, which can quickly screen 29 kinds of fusion gene derived from chromosome structural aberrations at one time, maybe helpful to improve M1CM classification and guide the choice of treatment.     

多重巢式RT-PCR技术在急性髓系白血病中的应用

Objective To analyse the fusion genes derived from chromosome structural aberrations in acute myeloid leukemia(AML) and the relationship between fusion genes and the MICM classification, clinical diagnosis, chemotherapy and prognosis. Methods The expression of fusion gene in bone marrow samples was detected with multiplex RT-PCR technique and chromosome karyotypes, immunological phenotypes and clinical data were analyzed in 60 acute myeloid leukemia newly diagnosed. Results 37 cases(61.67 %) of 60 patients carried 5 kinds of fusion genes consisting of MLL-AF9, TLS-ERG, CBFβ-MYH1, AML1-ETO and PML-RARα. The activation of oncogene HOX11 was detected in 13 AML cases, three of them with other chromosome aberration simultaneously.23 cases of 31 patients carrying AML1-ETO or PML-RARα, reached complete remission(CR) after chemotherapy and without relapse. Conclusion Gene typing is the most precise classification method that can direct clinical treatment and evaluate prognosis. Multiplex RT-PCR technique, which can quickly screen 29 kinds of fusion gene derived from chromosome structural aberrations at one time, maybe helpful to improve M1CM classification and guide the choice of treatment.     

多重巢式RT-PCR技术在急性髓系白血病中的应用

Objective To analyse the fusion genes derived from chromosome structural aberrations in acute myeloid leukemia(AML) and the relationship between fusion genes and the MICM classification, clinical diagnosis, chemotherapy and prognosis. Methods The expression of fusion gene in bone marrow samples was detected with multiplex RT-PCR technique and chromosome karyotypes, immunological phenotypes and clinical data were analyzed in 60 acute myeloid leukemia newly diagnosed. Results 37 cases(61.67 %) of 60 patients carried 5 kinds of fusion genes consisting of MLL-AF9, TLS-ERG, CBFβ-MYH1, AML1-ETO and PML-RARα. The activation of oncogene HOX11 was detected in 13 AML cases, three of them with other chromosome aberration simultaneously.23 cases of 31 patients carrying AML1-ETO or PML-RARα, reached complete remission(CR) after chemotherapy and without relapse. Conclusion Gene typing is the most precise classification method that can direct clinical treatment and evaluate prognosis. Multiplex RT-PCR technique, which can quickly screen 29 kinds of fusion gene derived from chromosome structural aberrations at one time, maybe helpful to improve M1CM classification and guide the choice of treatment.     

多重巢式RT-PCR技术在急性髓系白血病中的应用

Objective To analyse the fusion genes derived from chromosome structural aberrations in acute myeloid leukemia(AML) and the relationship between fusion genes and the MICM classification, clinical diagnosis, chemotherapy and prognosis. Methods The expression of fusion gene in bone marrow samples was detected with multiplex RT-PCR technique and chromosome karyotypes, immunological phenotypes and clinical data were analyzed in 60 acute myeloid leukemia newly diagnosed. Results 37 cases(61.67 %) of 60 patients carried 5 kinds of fusion genes consisting of MLL-AF9, TLS-ERG, CBFβ-MYH1, AML1-ETO and PML-RARα. The activation of oncogene HOX11 was detected in 13 AML cases, three of them with other chromosome aberration simultaneously.23 cases of 31 patients carrying AML1-ETO or PML-RARα, reached complete remission(CR) after chemotherapy and without relapse. Conclusion Gene typing is the most precise classification method that can direct clinical treatment and evaluate prognosis. Multiplex RT-PCR technique, which can quickly screen 29 kinds of fusion gene derived from chromosome structural aberrations at one time, maybe helpful to improve M1CM classification and guide the choice of treatment.     

多重巢式RT-PCR技术在急性髓系白血病中的应用

Objective To analyse the fusion genes derived from chromosome structural aberrations in acute myeloid leukemia(AML) and the relationship between fusion genes and the MICM classification, clinical diagnosis, chemotherapy and prognosis. Methods The expression of fusion gene in bone marrow samples was detected with multiplex RT-PCR technique and chromosome karyotypes, immunological phenotypes and clinical data were analyzed in 60 acute myeloid leukemia newly diagnosed. Results 37 cases(61.67 %) of 60 patients carried 5 kinds of fusion genes consisting of MLL-AF9, TLS-ERG, CBFβ-MYH1, AML1-ETO and PML-RARα. The activation of oncogene HOX11 was detected in 13 AML cases, three of them with other chromosome aberration simultaneously.23 cases of 31 patients carrying AML1-ETO or PML-RARα, reached complete remission(CR) after chemotherapy and without relapse. Conclusion Gene typing is the most precise classification method that can direct clinical treatment and evaluate prognosis. Multiplex RT-PCR technique, which can quickly screen 29 kinds of fusion gene derived from chromosome structural aberrations at one time, maybe helpful to improve M1CM classification and guide the choice of treatment.     

多重巢式RT-PCR和染色体核型分析技术在急性髓系白血病中的联合应用

背景与目的:细胞遗传学分析在白血病的诊断和预后判断中有重要价值,但常规显带不仅耗时,且难以获得良好的分裂相;而聚合酶链反应具有灵敏、快速的特点.本研究探讨联合应用多重巢式RT-PCR和染色体核型分析,对急性髓系白血病(acute myeloid leukemia,AML)中融合基因的表达及其在各亚型的分布和克隆性染色体异常的检出情况.方法:采用多重巢式RT-PCR技术对60例AML病例进行检测,其中37例同时进行染色体R或G显带.结果:60例AML患者中检出融合基因28例(46.7%),包括AML1/ETO、PML/RARα、CBFβ/MYH11、MLL基因异常(包括MLL/AF6、MLL/AF9、MLL/AF10、MLL/MLL)、DEK/CAN、TEL/PDGFR、AML1/MDS1(EVI-1).同时进行染色体R或G显带的37例病例中有30例可供分析,其中14例(46.7%)检出染色体结构和数目异常;联合多重RT-PCR可使AML克隆性染色体异常检出率增至59.5%(22/37).结论:联合多重巢式RT-PCR和染色体核型分析技术可以提高克隆性染色体异常的检出率.     

急性髓系白血病Evil基因表达的研究

目的:探讨急性髓系白血病中Evil基因表达及意义.方法:应用RT-PCR方法检测了94例急性髓系白血病(AML,包括初治19例,复发23例,缓解22例)患者及10名正常对照Evil基因的表达.结果:10名正常人骨髓单个核细胞中无Evil mRNA的表达.AML患者Evil基因总的阳性表达率为18.1%(17/94),M5型未见表达,其中初治、复发、缓解组的Evil基因阳性率分别为26.5%、17.4%、0,初治和复发组差别无显著性(P=0.554).M3患者中Evil、PML/RARα双阳性组与PML/RARα单阳性组相比复发率高(P＜0.05),早期死亡率高.Evil阳性的AML患者多数生存期短.结论:Evil基因是一个原癌基因,在髓系白血病的发病中起重要作用,是髓系白血病预后不良的一个指标.     

WT1 isoform expression pattern in acute myeloid leukemia

WT1 plays a dual role in leukemia development, probably due to an imbalance in the expression of the 4 main WT1 isoforms. We quantify their expression and evaluate them in a series of AML patients.Our data showed a predominant expression of isoform D in AML, although in a lower quantity than in normal CD34+ cells. We found a positive correlation between the total WT1 expression and A, B and C isoforms. The overexpression of WT1 in AML might be due to a relative increase in A, B and C isoforms, together with a relative decrease in isoform D expression.