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作 者:刘旭平[1,2,3,4] 张美荣 代芸[1,2,3,4] 张莉 李睿[1,2,3,4] 郝玉书 肖志坚[1,2,3,4]
机构地区:[1]中国医学科学院,天津300020 [2]中国协和医科大学血液学研究所 [3]血液病医院 [4]实验血液学国家重点实验室
出 处:《中华血液学杂志》2006年第5期310-313,共4页Chinese Journal of Hematology
基 金:国家自然科学基金(30270573)
摘 要:目的探讨慢性粒细胞白血病(CML)急性髓系白血病(AML)变伴 t(3;21)(q26;q22)的受累基因。方法对1例 CML AML 变伴 t(3;21)(q26;q22)患者细胞间期和中期分裂相细胞采用荧光原位杂交技术(FISH)检测 AML1和 bcr/abl 基因重排,RT-PCR 联合序列分析检测 t(3;21)(q26;q22)受累基因。结果 der(3)和 der(21)染色体上均检测到 AML1基因杂交信号,AML1-MDS1-Evil、AML1-MDS1、AML1-EAP 及 Evi1基因均表达,未见 AML1-Evi1融合基因表达,AML1-MDS1-Evi1基因表达水平是 AML1-MDS1、AML1-EAP 表达水平的1.58和1.54倍,患者 Evi1基因表达水平是 HEL 细胞系 Evi1表达水平的2.71倍。结论 t(3;21)(q26;q22)导致形成 AML1-MDS1-Evi1、AML1-MDS1融合基因及 Evi1基因激活,这些继发的分子遗传学异常是 CML 急性变伴 t(3;21)(q26;q22)患者急变发生的分子基础。Objective To explore genes involved in chronic myeloid leukemia (CML) with t(3 ;21 ) (q26;q22) chromosome translocation in blastic crisis. Methods A case of CML patient with t(3 ;21 ) (q26; q22) in blastic crisis was reported. AML1 and bcr/abl genes were detected by FISH in interphase and metaphase cells. Genes involved in t(3 ;21 )(q26;q22) were analysed by RT-PCR and sequencing. Results AML1 gene hybridization signal was detected in der ( 3 ) and der (21) chromosomes. AML1-Evil, AML1- MDS1-Evil, AML1-EAP fusion transcripts and Evil gene were detected in mRNA level, but no AML1-Evil fusion transcript. The mRNA expression level of AML1-MDS1-Evil fusion gene was 1.58 and 1.54 times higher than that of AML1-MDS1 and AML1-EAP, respectively. The mRNA expression level of Evil gene of the patient was 2.71 times higher than that of HEL cell line. Conclusion t( 3 ;21 ) ( q26 ;q22) resulted in the AML1-MDS1-Evil, AML1-MDS1, AML1-EAP fusion transcripts, and Evil gene was also activated by the translocation. These secondary aberrations should be the molecular basis of CML patient with t(3 ;21 ) (q26; q22 ) in blastic crisis.
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