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作 者:何亚香[1] 薛永权[3] 王红英[1] 邵雪君[1] 杨乃超[2] 徐俊[1] 朱宏[1] 胡绍燕[2]
机构地区:[1]215003苏州大学附属儿童医院小儿肿瘤与血液学研究室 [2]215003苏州大学附属儿童医院血液科 [3]苏州大学附属第一人民医院江苏省血液病研究所细胞遗传室
出 处:《白血病.淋巴瘤》2012年第9期517-519,共3页Journal of Leukemia & Lymphoma
摘 要:目的报道2例分别伴有t(8;20)(q22;q13)和t(1;8;21)(q32;q22;q22)的t(8;21)变异易位的M:型急性髓系白血病(AML—M2)。方法骨髓细胞短期培养法制备染色体标本,应用反带和吉姆萨显带技术进行核型分析;双色双融合AML1-ETO探针进行间期及中期双色荧光原位杂交(D.FISH)检测AML1-ETO融合信号;多重巢式反转录一聚合酶链反应(RT—PCR)技术检测AML1-ETO融合基因转录本。结果例1核型为45,x,-y,t(8;20)(q22;q13)[12]/46,XY[3],例2核型为46,xx,t(1;8;21)(q32;q22;q22)[18]/46,XX[2];间期和中期FISH证实了AML1-ETO融合基因和变异易位的存在;多重巢式RT—PCR检测到AML1-ETO融合基因转录本。结论t(8;20)(q22;q13)和t(1;8;21)(q32;q22;q22)实质上都是t(8;21)的变异型易位;核型分析联合D—FISH、多重巢式RT—PCR对确定伴有变异型t(8;21)易位的AML患者的性质和预后是重要的。Objective To report two childhood acute myeloid leukemia (AML) patients with t(8;20) (q22;q13) and t(1;8;21)(q32;q22;q22) respectively, as variant t(8;21). Methods Chromosome preparation of hone marrow cells were made using short-term culture and karyotypic analysis was carried out using R and G-banding techniques. Interphase-fluorescence in situ hybridization (I-FISH) and metaphase-FISH (M-FISH) were performed using dual color, dual fusion AML1-ETO probe to detect the AML1-ETO fusion gene. Multiplex RT-PCR was used to demonstrate the expression of AMLI-ETO fusion transcript. Results The karyotype of bone marrow cells for these two childhood AML patients were 45,X,-Y, t(8;20)(q22;q13)[12]/46, XY[3] (case 1) and 46,XX, t(1;8;21)(q32;q22;q22)[18]/46,XX[2] (case 2), respectively. I-FISH and M-FISH confirmed that they all had the AML1-ETO fusion gene and variant t(8;21). The AML1-ETO fusion transcript in both patients was detected by RT-PCR. Conclusion t (8;20)(q22;q13) and t (1;8;21)(q32;q22;q22) are variant t (8;21) in nature. It is important to combine the conventional karyotypic analysis with D-FISH and multiplex RT-PCR to determine the nature and prognosis of AML patients with variant t(8;21).
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