ETV6 mutations in early immature human T cell leukemias.

ETV6 mutations in early immature human T cell leukemias.
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DOI:
10.1084/jem.20112239
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发表时间:
2011-12-19
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Ferrando AA
Ferrando AA
中科院分区:
其他
文献类型:
--
作者:
Van Vlierberghe P;Ambesi-Impiombato A;Perez-Garcia A;Haydu JE;Rigo I;Hadler M;Tosello V;Della Gatta G;Paietta E;Racevskis J;Wiernik PH;Luger SM;Rowe JM;Rue M;Ferrando AA

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相当大比例的成人T-ALL样本显示T细胞和急性髓性白血病的基因表达和突变特征; ETV 6突变仅在成人T-ALL患者的这个新分子亚组中发现。早期未成熟T细胞急性淋巴细胞白血病(T-ALL)占儿科T-ALL的10.5%-10%,并且与预后不良相关。然而,驱动这些肿瘤生物学的遗传缺陷在很大程度上仍然未知。在这项研究中,对成人T-ALL的微阵列基因表达特征的分析表明,早期未成熟白血病的患病率很高,并揭示了这些肿瘤与髓系白血病之间的密切关系。许多成人未成熟T-ALL在骨髓特异性癌基因和肿瘤抑制因子(包括IDH 1、IDH 2、DNMT 3A、FLT 3和NRAS)中存在突变。此外,我们确定ETV 6突变是一种独特存在于未成熟成人T-ALL中的新型遗传病变。我们的研究结果表明,早期未成熟成人T-ALL代表了一种异质性白血病,其特征在于存在重叠的髓系和T-ALL特征,并突出了ETV 6突变在这些肿瘤中的潜在作用。
A substantial proportion of adult T-ALL samples display gene expression and mutation characteristics of both T cell and acute myeloid leukemias; mutations in ETV6 are found exclusively within this new molecular subgroup of adult T-ALL patients. Early immature T cell acute lymphoblastic leukemias (T-ALLs) account for ∼5–10% of pediatric T-ALLs and are associated with poor prognosis. However, the genetic defects that drive the biology of these tumors remain largely unknown. In this study, analysis of microarray gene expression signatures in adult T-ALL demonstrated a high prevalence of early immature leukemias and revealed a close relationship between these tumors and myeloid leukemias. Many adult immature T-ALLs harbored mutations in myeloid-specific oncogenes and tumor suppressors including IDH1, IDH2, DNMT3A, FLT3, and NRAS. Moreover, we identified ETV6 mutations as a novel genetic lesion uniquely present in immature adult T-ALL. Our results demonstrate that early immature adult T-ALL represents a heterogeneous category of leukemias characterized by the presence of overlapping myeloid and T-ALL characteristics, and highlight the potential role of ETV6 mutations in these tumors.
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