Abstract

目的比较染色体核型分析和荧光原位杂交(FISH)两种方法检测酪氨酸激酶抑制剂(TKI)治疗慢性髓性白血病(CML)细胞遗传学反应的差异,及其与分子学反应的相关性。方法同期采集367例CML患者504份骨髓样本,以传统显带分析(CBA)法和FISH法进行染色体分析,以实时荧光定量PCR(RQ-PCR)法检测BCR-ABL转录本水平。结果504份样本中,采用CBA法检测,344份达完全细胞遗传学反应(CCyR);采用FISH法检测,297份达CCyR(BCR-ABL+细胞<1%)。同期比较493份标本的CBA、FISH和RQ-PCR结果,在337份CBA-CCyR的样本中,273份(81.0%)达FISHCCyR,289份(85.8%)分子学反应BCR-ABLIS ≤ 1%;290份FISH-CCyR样本中,261份(90.0%)分子学反应BCR-ABLIS ≤ 1%。CBA-CCyR和FISH-CCyR两组样本BCR-ABLIS中位数分别为0.21%和0.13%,差异无统计学意义(z=−1.875, P=0.061)。将FISH结果按BCR-ABL+细胞比例分成0、>0~<1%、1%~5%三组,三组样本获分子学反应BCR-ABLIS ≤ 1%的比例分别为94.1%、57.6%、27.7%,差异有统计学意义(χ2=43.499, P<0.001; χ2=9.734,P=0.003);三组BCR-ABLIS中位数分别为0.10%、0.64%、1.80%,差异有统计学意义(z=−5.864, P<0.001; z=−4.787, P<0.001)。结论CBA和FISH两种方法对于CCyR的监测具有较好的一致性,FISH比CBA法敏感性更高,FISH结果与分子学反应有更好的一致性,但如何定义FISH-CCyR仍需大宗病例随访研究。

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