两例急性髓系白血病伴t(6;21;8)(p22;q22;q22)复杂易位患者的临床与实验室研究  被引量:7

Clinical and laboratory study of a complex translocation t (6;21;8)(p22;q22;q22)in two patients with acute myeloid leukemia

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作  者:贡金英 刘旭平 李承文 赵喜晨 代芸[1,2,3] 秦爽 肖继刚 黄琪 徐方运 王芳[1,2,3] 崔雯 刘世和 王建祥[1,2,3] 

机构地区:[1]中国医学科学院,300020 [2]天津中国协和医科大学血液学研究所 [3]血液病医院

出  处:《中华血液学杂志》2006年第5期314-317,共4页Chinese Journal of Hematology

基  金:国家自然科学基金(30370593)

摘  要:目的探讨2例急性髓系白血病(AML)伴 t(6;21;8)(p22;q22;q22)复杂易位患者的临床及实验室特点。方法骨髓细胞经短期24h 培养后按常规方法制备染色体标本,R 显带进行核型分析;双色双融合 AML1/ETO 探针进行丝裂间期及中期荧光原位杂交(FISH)检测 AML1/ETO 融合信号;逆转录-聚合酶链反应(RT-PCR)检测 AML1/ETO 融合基因转录本;综合分析临床特征。结果2例患者常规细胞遗传学分析显示均存在 t(6;21;8)(p22;q22;q22),间期和中期 FISH 证实了核型结果;RT-PCR 检测到 AML1/ETO 融合基因转录本;尽管2例患者均诊断为 AML-M_2,但二者的免疫表型和治疗反应不同。结论 t(6;21;8)(p22;q22;q22)是一种少见的 t(8;21)(q22;q22)的复杂变异易位,还需要更多的病例以明确其临床特征和预后价值。Objective To investigate the clinical and laboratory characteristics of a complex translocation t(6;21 ;8) (p22;q22;q22) in two patients with acute myeloid leukemia. Methods Bone marrow (BM) samples were collected at presentation, prepared by short-term (24 hours) unstimulated culture and Rbinding, for conventional cytogenetic assay(CCA). The complex translocation was assayed by fluorescence in situ hybridization (FISH) with a dual-color AML1/ETO-specific probe. AML1/ETO chimeric transcript was detected by reverse transcription polymerase chain reaction (RT-PCR). Results In both cases CCA demonstrated a complex translocation, t(6;8;21 )(p22;q22;q22), which was confirmed by interphase and metaphase FISH and AML1/ETO fusion transcript was detected by RT-PCR. Both the two patients were diagnosed as AML-M2 , but with different immunophenotype and therapeutic outcome. Conclusion The t (6 ; 21 ; 8) ( p22 ; q22 ; q22 ) is a rare variant of complex translocation of t ( 8 ; 21 ) ( q22 ; q22 ). More such cases are needed for elucidating its clinical features and prognosis.

关 键 词:易位 t(6 21 8) 基因融合 AML1/ETO 白血病 粒细胞 急性 原位杂交 荧光 逆转录-聚合酶链反应 

分 类 号:R733.71[医药卫生—肿瘤] R596.1[医药卫生—临床医学]

 

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