当前位置: X-MOL 学术Leukemia › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Genetic hallmarks and clinical implications of chromothripsis in childhood T-cell acute lymphoblastic leukemia
Leukemia ( IF 12.8 ) Pub Date : 2024-08-27 , DOI: 10.1038/s41375-024-02370-z
Agata Pastorczak 1, 2 , Zuzanna Urbanska 2 , Borys Styka 3 , Karolina Miarka-Walczyk 2 , Lukasz Sedek 4 , Kamila Wypyszczak 2 , Anna Wakulinska 5 , Zuzanna Nowicka 6 , Tomasz Szczepański 4 , Marcin Stańczak 6 , Wojciech Fendler 6, 7 , Jerzy Kowalczyk 8 , Wojciech Młynarski 1, 9 , Monika Lejman 3
Affiliation  

Chromothripsis (cth) is a form of genomic instability leading to massive de novo structural chromosome rearrangements in a one-time catastrophic event. It can cause cancer-promoting alterations, such as loss of sequences for tumor-suppressor genes, formation of oncogenic fusions, and oncogene amplifications. We investigated the genetic background and clinical significance of cth in childhood T-cell acute lymphoblastic leukemia (T-ALL) patients. For this purpose, whole-genome copy number alterations were analyzed in 173 children with newly diagnosed T-ALL using high-density microarrays. Cth was identified in 10 T-ALL samples (5.78%). In six of them, cth occurred in a constitutional background of Nijmegen breakage syndrome (n = 5) or Li-Fraumeni syndrome (n = 1). Cth generated alterations, including deletions of CDKN2A/B (n = 4) and EZH2 (n = 4), amplifications of CDK6 (n = 2), and NUP214::ABL1 and TFG::GPR128 fusions. Cth-positive leukemias exhibited deletions involving the tumor-suppressor genes RB1 (n = 3), TP53 (n = 1) and MED12 (n = 2). Cth-positive T-ALL patients had a lower probability of 5-year overall survival (OS) [0.56 vs. 0.81; hazard ratio (HR) = 4.14 (1.42–12.02) p = 0.017] as did 5-year event-free survival [0.45 vs. 0.74; HR = 3.91 (1.52–10.08); p = 0.012]. Chromothripsis is an infrequent genomic phenomenon in pediatric T-ALL but is significantly associated with cancer-predisposing syndromes and may associate with inferior prognosis.



中文翻译:


儿童 T 细胞急性淋巴细胞白血病染色体裂变的遗传标志和临床意义



染色体裂网 (cth) 是一种基因组不稳定性,导致在一次性灾难性事件中发生大规模从头结构染色体重排。它会导致促癌改变,例如肿瘤抑制基因序列丢失、致癌融合的形成和致癌基因扩增。我们调查了儿童 T 细胞急性淋巴细胞白血病 (T-ALL) 患者 cth 的遗传背景和临床意义。为此,使用高密度微阵列分析了 173 名新诊断的 T-ALL 儿童的全基因组拷贝数改变。在 10 例 T-ALL 样本中鉴定出 Cth (5.78%)。在其中 6 项研究中,cth 发生在奈梅亨断裂综合征 (n = 5) 或 Li-Fraumeni 综合征 (n = 1) 的体质背景下。Cth 产生改变,包括 CDKN2A/Bn = 4) 和 EZH2n = 4) 的缺失、CDK6n = 2) 的扩增以及 NUP214::ABL1TFG::GPR128 融合。Cth 阳性白血病表现出涉及肿瘤抑制基因 RB1n = 3) 、 TP53n = 1) 和 MED12n = 2) 的缺失。Cth 阳性 T-ALL 患者的 5 年总生存率 (OS) [0.56 vs. 0.81;风险比 (HR) = 4.14 (1.42–12.02) p = 0.017] 和 5 年无事件生存率 [0.45 vs. 0.74;心率 = 3.91 (1.52–10.08);p = 0.012]。染色体裂是儿科 T-ALL 中一种罕见的基因组现象,但与癌症易感综合征显著相关,并且可能与预后较差有关。

更新日期:2024-08-27
down
wechat
bug