Measurable residual disease monitoring by NGS before allogeneic hematopoietic cell transplantation in AML.

Measurable residual disease monitoring by NGS before allogeneic hematopoietic cell transplantation in AML.
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DOI:
10.1182/blood-2018-02-829911
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发表时间:
2018-10-18
期刊:
影响因子:
20.3
通讯作者:
Heuser M
Heuser M
中科院分区:
医学1区
文献类型:
--
作者:
Thol F;Gabdoulline R;Liebich A;Klement P;Schiller J;Kandziora C;Hambach L;Stadler M;Koenecke C;Flintrop M;Pankratz M;Wichmann M;Neziri B;Büttner K;Heida B;Klesse S;Chaturvedi A;Kloos A;Göhring G;Schlegelberger B;Gaidzik VI;Bullinger L;Fiedler W;Heim A;Hamwi I;Eder M;Krauter J;Schlenk RF;Paschka P;Döhner K;Döhner H;Ganser A;Heuser M

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由于缺乏合适的实时定量PCR标记物,大约60%的急性髓性白血病(AML)患者无法进行分子可测量残留疾病(MRD)评估。为了克服这一限制,我们建立了一种可应用于任何体细胞基因突变的错误校正下一代测序(NGS) MRD方法。在116例接受同种异体造血细胞移植(alloHCT)的完全形态缓解(CR) AML患者中评估了该方法的临床意义。在诊断时,有针对性的重测序在93%的患者中发现了一个合适的突变,涵盖了24种不同的基因。在同种异体hct前测量外周血或骨髓CR样本的MRD,并鉴定出12例具有祖先克隆持久性的患者(变异等位基因频率,VAF bb0 %)。其余96例患者组成最终队列,其中45%为MRD阳性(中位VAF 0.33,范围0.016-4.91%)。在竞争风险分析中,MRD阳性患者的累积复发率(CIR)高于阴性患者(HR 5.58, P<0.001, 5年CIR 66 vs 17%),而非复发死亡率(NRM)无显著差异(HR 0.60, P=0.47)。在多变量分析中,MRD阳性是诊断时除FLT3-ITD和NPM1突变状态外CIR (HR 5.68, P<0.001)的独立阴性预测因子,以及除调节方案、TP53和KRAS突变状态外总生存(OS) (HR 3.0, P=0.004)的独立阴性预测因子。综上所述,基于ngs的MRD广泛适用于AML患者,具有较高的复发和生存预测能力,可能有助于改善AML患者的移植和移植后管理。
Molecular measurable residual disease (MRD) assessment is not established in approximately 60 percent of acute myeloid leukemia (AML) patients due to the lack of suitable markers for quantitative real-time PCR. To overcome this limitation we established an error-corrected next-generation-sequencing (NGS) MRD approach which can be applied to any somatic gene mutation. The clinical significance of this approach was evaluated in 116 AML patients undergoing allogeneic hematopoietic cell transplantation (alloHCT) in complete morphologic remission (CR). Targeted resequencing at the time of diagnosis identified a suitable mutation in 93 percent of the patients covering 24 different genes. MRD was measured in CR samples from peripheral blood or bone marrow before alloHCT and identified 12 patients with persistence of an ancestral clone (variant allele frequency, VAF >5%). The remaining 96 patients formed the final cohort of which 45% were MRD positive (median VAF 0.33, range 0.016-4.91%). In competing risk analysis cumulative incidence of relapse (CIR) was higher in MRD positive than negative patients (HR 5.58, P<0.001, 5-year CIR 66 vs 17%), while non-relapse mortality (NRM) was not significantly different (HR 0.60, P=0.47). In multivariate analysis MRD positivity was an independent negative predictor of CIR (HR 5.68, P<0.001) besides FLT3-ITD and NPM1 mutation status at the time of diagnosis, and of overall survival (OS) (HR 3.0, P=0.004) besides conditioning regimen, TP53 and KRAS mutation status. In conclusion, NGS-based MRD is widely applicable to AML patients, highly predictive of relapse and survival, and may help refining transplant and posttransplant management in AML patients.
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影响因子: --
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影响因子: 11.1
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发表时间: 2017-08-01
影响因子: 3.5
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