急性髓系白血病22号染色体三体和inv(16)的相关性研究

目的探讨22号染色体三体（＋22）在诊断inv（16）急性髓系白血病（AML）中的价值。方法采用红、绿荧光直接标记的双色断裂点分离的基因探针CBFβ对18例存在＋22克隆异常的AML患者进行间期荧光原位杂交（FISH）检测，并与R显带常规细胞遗传学（CC）检测结果进行比较分析。应用多重荧光原位杂交（M—FISH）技术检测同时伴有＋22和inv（16）的AML患者。结果18例存在＋22的AML患者中，CC分析未发现inv（16）阳性，而FISH检测发现11例inv（16）阳性、1例del（16）（q22）。这11例阳性患者中，9例CC分析为单纯＋22异常，1例伴有＋8，1例患者为del（16）（q22），而FISH检测为inv（16）。M—FISH检测4例同时伴有＋22和inv（16）的患者，除＋22外，未发现其他异常。结论＋22是预测inv（16）AML的重要标志，具有潜在的诊断inv（16）AML的价值。

Study of trisomy 22 and inversion 16 in acute myeloid leukemia

OBJECTIVE: To explore the value of trisomy 22 ( +22) in the diagnosis of inv(16) acute myeloid leukemia (AML). METHODS: Interphase fluorescence in situ hybridization (FISH) was performed in 18 AML patients with +22. The probe was two-color break apart probe for CBFbeta with SpectrumRed on the centromeric side and SpectrumGreen on the telomeric side. The FISH results were compared with that of R-banding conventional cytogenetics (CC). Multiplex FISH (M-FISH) was used to analyze the relationship of +22 and inv(16). RESULTS: CC revealed inv(16) in none of the 18 AML, with +22, but FISH revealed inv (16) in 11 of them and del( 16) (q22) in one. As CC results, 9 of the 11 cases were sole +22, one complicated with trisomy 8, and one del(16) (q22). Four patients with +22 and inv(16) were analyzed by M-FISH and revealed +22 only. CONCLUSION: +22 can be regarded as an important marker for the diagnosis of inv(16) AML.