Abstract

目的分析伴T315I突变的Ph染色体阳性急性淋巴细胞白血病(Ph+ALL)和慢性髓性白血病(CML)的特征及疗效。方法收集2014年3月至2015年6月于郑州大学附属肿瘤医院行ABL激酶区突变检测并对酪氨酸激酶抑制剂(TKI)耐药的23例Ph+ ALL患者和95例CML患者的临床资料。采用R显带法进行染色体分析,实时定量PCR方法检测BCR-ABL融合基因,TRIzol法提取总RNA,直接测序法检测ABL激酶区突变。结果ABL激酶区突变发生率在TKI耐药Ph+ ALL和CML中分别为60.9%(14/23)、41.1%(39/95),其中T315I突变发生率分别为34.8%(8/23)和5.3%(5/95),差异具有统计学意义(χ2=13.586,P<0.01)。CML慢性期患者ABL激酶区突变发生率为38.8%(19/49),加速期、急变期分别为47.1%(8/17)、41.4%(12/29),差异无统计学意义(χ2=0.360,P=0.835)。Ph+ ALL、CML患者自开始TKI治疗至发生T315I突变的中位时间分别为10和19个月,T315I突变发生至死亡或随访终止的中位时间分别为2和3个月,中位血液学缓解持续时间分别为10和16个月,中位总生存时间分别为13和42个月。结论Ph+ ALL较CML更易出现T315I突变,但两者自开始TKI治疗至发生T315I突变的中位时间相近,在现有方案治疗下,两者血液学缓解持续时间、总生存时间相近。

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