Leukemia:DNMT3A突变的转录水平并不能预测急性髓系白血病患者的结局

2018-01-23 MedSci MedSci原创

达到完全缓解是患者治愈或长期生存的不可或缺的先决条件。形态学上的完全缓解,即骨髓原始细胞<5%,对临床医生来说仍是有效的评估诱导治疗效果的必需信息。

达到完全缓解是患者治愈或长期生存的不可或缺的先决条件。形态学上的完全缓解,即骨髓原始细胞<5%,对临床医生来说仍是有效的评估诱导治疗效果的必需信息。

科学家们为了寻找DNMT3Amut是否能够作为微小残留病灶(minimal residual disease,MRD)监测,以及预测AML患者治疗结局的分子标志。通过实时定量聚合酶链式反应检测了1494个样本,而这些样本是从181例接受高强度治疗,并且存在DNMT3A在密码子R882(R882H;R882C)两个突变中的一个的病人中获得的。

在疾病诊断时,DNMT3A突变转录水平与目前的临床疾病特征,同时发生的基因突变,以及生存终点没有明显的相关性。在Cox回归分析汇总显示骨髓DNMT3Amut转录水平与复发或死亡率不相关。在诱导期Ⅰ,诱导期Ⅱ和巩固期Ⅰ,巩固期Ⅱ的DNMT3Amut转录水平在骨髓中显着高于血液。关于临床相关MRD时间点,在诱导两个循环之后,以及治疗后期,DNMT3Amut转录水平对终点缓和持续期以及整体生存没有明显的影响。值得注意的是,仅有一小部分的病人达到了PQ-PCR检测阴性,并且大部分病人都存在持续的高水平DNMT3Amut转录,而这个研究结果表明在血液缓解期,克隆性造血持续存在。

本文出处:Gaidzik V I, Weber D, Paschka P, et al. DNMT3A mutant transcript levels persist in remission and do not predict outcome in patients with acute myeloid leukemia[J]. Leukemia, 2017.doi:10.1038/leu.2017.200

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    2018-07-09 mjldent
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    2018-01-25 zjubiostat
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    2018-01-23 1217549fm29暂无昵称

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