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Genomic CDKN2A/2B deletions in adult Ph+ ALL are adverse despite allogeneic stem cell transplantation
Blood ( IF 21.0 ) Pub Date : 2018-03-29 , DOI: 10.1182/blood-2017-07-796862
Heike Pfeifer 1 , Katharina Raum 2, 3 , Sandra Markovic 1 , Verena Nowak 2 , Stephanie Fey 2 , Julia Obländer 2 , Jovita Pressler 2 , Verena Böhm 4 , Monika Brüggemann 4 , Lydia Wunderle 1 , Andreas Hüttmann 5 , Ralph Wäsch 6 , Joachim Beck 7 , Matthias Stelljes 8 , Andreas Viardot 9 , Fabian Lang 1 , Dieter Hoelzer 1 , Wolf-Karsten Hofmann 2 , Hubert Serve 1 , Christel Weiss 10 , Nicola Goekbuget 1 , Oliver G. Ottmann 1, 11 , Daniel Nowak 2
Affiliation  

We investigated the role of copy number alterations to refine risk stratification in adult Philadelphia chromosome positive (Ph)+ acute lymphoblastic leukemia (ALL) treated with tyrosine kinase inhibitors (TKIs) and allogeneic stem cell transplantation (aSCT). Ninety-seven Ph+ ALL patients (median age 41 years; range 18-64 years) within the prospective multicenter German Multicenter ALL Study Group studies 06/99 (n = 8) and 07/2003 (n = 89) were analyzed. All patients received TKI and aSCT in first complete remission (CR1). Copy number analysis was performed with single nucleotide polymorphism arrays and validated by multiplex ligation-dependent probe amplification. The frequencies of recurrently deleted genes were: IKZF1, 76%; CDKN2A/2B, 45%; PAX5, 43%; BTG1, 18%; EBF1, 13%; ETV6, 5%; RB, 14%. In univariate analyses, the presence of CDKN2A/2B deletions had a negative impact on all endpoints: overall survival (P = .023), disease-free survival (P = .012), and remission duration (P = .036). The negative predictive value of CDKN2A/2B deletions was retained in multivariable analysis along with other factors such as timing of TKI therapy, intensity of conditioning, achieving remission after induction phase 1 and BTG1 deletions. We therefore conclude that acquired genomic CDKN2A/2B deletions identify a subgroup of Ph+ ALL patients, who have an inferior prognosis despite aSCT in CR1. Their poor outcome was attributable primarily to a high relapse rate after aSCT.

中文翻译:

尽管进行了同种异体干细胞移植,但成人 Ph+ ALL 中的基因组 CDKN2A/2B 缺失是不利的

我们研究了拷贝数改变在用酪氨酸激酶抑制剂 (TKI) 和同种异体干细胞移植 (aSCT) 治疗的成人费城染色体阳性 (Ph) + 急性淋巴细胞白血病 (ALL) 中完善风险分层的作用。对前瞻性多中心德国多中心 ALL 研究组研究 06/99(n = 8)和 07/2003(n = 89)中的 97 名 Ph+ ALL 患者(中位年龄 41 岁;范围 18-64 岁)进行了分析。所有患者均在首次完全缓解(CR1)时接受了 TKI 和 aSCT。使用单核苷酸多态性阵列进行拷贝数分析,并通过多重连接依赖性探针扩增进行验证。反复缺失基因的频率为:IKZF1,76%;CDKN2A/2B,45%;PAX5,43%;BTG1,18%;EBF1,13%;ETV6,5%;RB,14%。在单变量分析中,CDKN2A/2B 缺失的存在对所有终点都有负面影响:总生存期 (P = .023)、无病生存期 (P = .012) 和缓解持续时间 (P = .036)。CDKN2A/2B 缺失的阴性预测值与其他因素一起保留在多变量分析中,如 TKI 治疗时间、调理强度、诱导期 1 后达到缓解和 BTG1 缺失。因此,我们得出结论,获得性基因组 CDKN2A/2B 缺失鉴定了一个 Ph+ ALL 患者亚组,尽管在 CR1 中进行了 aSCT,但他们的预后较差。他们的不良结局主要归因于 aSCT 后的高复发率。CDKN2A/2B 缺失的阴性预测值与其他因素一起保留在多变量分析中,如 TKI 治疗时间、调理强度、诱导期 1 后达到缓解和 BTG1 缺失。因此,我们得出结论,获得性基因组 CDKN2A/2B 缺失鉴定了一个 Ph+ ALL 患者亚组,尽管在 CR1 中进行了 aSCT,但其预后较差。他们的不良结局主要归因于 aSCT 后的高复发率。CDKN2A/2B 缺失的阴性预测值与其他因素一起保留在多变量分析中,如 TKI 治疗时间、调理强度、诱导期 1 后达到缓解和 BTG1 缺失。因此,我们得出结论,获得性基因组 CDKN2A/2B 缺失确定了 Ph+ ALL 患者的一个亚组,尽管在 CR1 中进行了 aSCT,但他们的预后较差。他们的不良结局主要归因于 aSCT 后的高复发率。
更新日期:2018-03-29
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