摘要
目的 报道 1例 t(15 ;17)的变异型插入易位 ins(17;15 ) (q2 1;q14 q2 2 )病例及其染色体涂染、逆转录 - PCR的研究结果。方法 骨髓细胞经直接法或 2 4 h培养和外周血单采白血病细胞培养 6天后制备染色体标本 ,以 R显带技术进行核型分析 ;以 15号和 17号整条染色体涂染探针进行染色体涂染 ;以逆转录 -PCR技术检测 PML - RARα和 RARα- PML融合基因的转录本。结果 该患者骨髓细胞和外周血白血病细胞染色体 R显带核型分析结果均提示 15 q-和 17q+;涂染研究证实 17号染色体长臂插入一段 15号染色体来源的染色体片段 ;逆转录 - PCR检出 PML- RARα融合基因短型转录本 ,未检出 RARα- PML 融合基因的转录本 ,符合 ins(17;15 )所致的遗传学改变。结论 染色体涂染和逆转录 - PCR技术是明确急性早幼粒细胞白血病患者涉及 15和 17号染色体插入易位的可靠手段。
ObjectiveTo report a rare variant of t(15;17), ins(17;15)(q21;q14q22) in an acute promyelocytic leukemia (APL) patient and the results of cytogenetic and molecular genetic studies. MethodsChromosomes were prepared after 24 hours culture of bone marrow cells and peripheral blood cells. R-banding technique was used to analyze karyotypes. Chromosome painting analysis was performed using whole chromosome paints for chromosomes 15 and 17. PML-RARα and RARα-PML fusion transcripts were detected by reverse transcription-polymerase chain reaction (RT-PCR). Results Karyotypic analysis using both specimens from bone marrow and peripheral blood leukemic cells revealed 15q- and 17q+. Chromosome painting analysis confirmed that the karyotypic abnormality was ins(17;15). PML-RARα fusion transcript (S type) was detected by RT-PCR, while RARα-PML fusion transcript was not detected. Conclusion Chromosome painting and RT-PCR are reliable methods for characterization of the insertion involving chromosomes 15 and 17 in APL patients.
出处
《中华医学遗传学杂志》
CAS
CSCD
2004年第1期77-79,共3页
Chinese Journal of Medical Genetics
基金
苏州市科技项目 (ZS0 2 0 1 )~~
