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Clinical, molecular, and prognostic correlates of number, type, and functional localization of TET2 mutations in chronic myelomonocytic leukemia (CMML)-a study of 1084 patients.
Leukemia ( IF 12.8 ) Pub Date : 2019-12-13 , DOI: 10.1038/s41375-019-0690-7
Giacomo Coltro 1, 2, 3 , Abhishek A Mangaonkar 1 , Terra L Lasho 1 , Christy M Finke 1 , Prateek Pophali 1 , Ryan Carr 1 , Naseema Gangat 1 , Moritz Binder 1 , Animesh Pardanani 1 , Martin Fernandez-Zapico 4 , Keith D Robertson 4 , Alberto Bosi 2 , Nathalie Droin 5, 6, 7 , Alessandro M Vannucchi 3 , Ayalew Tefferi 1 , Anthony Hunter 8 , Eric Padron 8 , Eric Solary 5, 6, 9 , Mrinal M Patnaik 1
Affiliation  

Loss-of-function TET2 mutations (TET2MT) are frequent early clonal events in myeloid neoplasms and are thought to confer a fitness advantage to hematopoietic precursors. This large, multi-institutional study (n = 1084), investigated the TET2 mutational landscape and prognostic implications of the number, type, and location of TET2MT and the epistatic relationship with other somatic events in chronic myelomonocytic leukemia (CMML). Nine hundred and forty-two TET2MT were identified in 604 (56%) patients, of which 710 (75%) were predicted to be truncating (involving the catalytic domain). Three hundred and sixteen (29%) patients had ≥1 TET2MT, with 28%, 1%, and 0.2% harboring 2, 3, and 5 mutations, respectively. In comparison to TET2WT, TET2MT patients were older in age, more likely to have dysplastic CMML, a higher number of co-occurring mutations, and lower-risk stratification. Importantly, TET2MT were associated with a survival advantage (49 vs. 30 months, p < 0.0001), especially in the context of multiple TET2MT (≥2; 57 months, p < 0.001), and truncating TET2MT (51 months, p < 0.001). In addition, the adverse prognostic impact of ASXL1MT was partially mitigated by concurrent TET2MT, with the ASXL1WT/TET2MT genotype having better outcomes and resulting in further risk stratification of ASXL1 inclusive CMML prognostic models, in comparison to ASXL1MT alone.

中文翻译:

慢性粒单核细胞白血病 (CMML) 中 TET2 突变的数量、类型和功能定位的临床、分子和预后相关性 - 一项对 1084 名患者的研究。

功能丧失 TET2 突变 (TET2MT) 是髓系肿瘤中常见的早期克隆事件,被认为赋予造血前体细胞适应性优势。这项大型、多机构研究 (n = 1084) 调查了 TET2 突变情况和 TET2MT 的数量、类型和位置的预后意义,以及与慢性粒单核细胞白血病 (CMML) 中其他体细胞事件的上位关系。在 604 名 (56%) 患者中鉴定出 942 名 TET2MT,其中 710 名 (75%) 预计会被截断(涉及催化结构域)。三百一十六 (29%) 名患者有 ≥1 个 TET2MT,分别有 28%、1% 和 0.2% 的患者携带 2、3 和 5 个突变。与 TET2WT 相比,TET2MT 患者年龄更大,更可能患有发育不良的 CMML,同时发生的突变数量更多,和低风险分层。重要的是,TET2MT 与生存优势相关(49 与 30 个月,p < 0.0001),尤其是在多个 TET2MT(≥2;57 个月,p < 0.001)和截断 TET2MT(51 个月,p < 0.001 )。此外,与单独使用 ASXL1MT 相比,同时 TET2MT 部分减轻了 ASXL1MT 的不良预后影响,与单独的 ASXL1MT 相比,ASXL1WT/TET2MT 基因型具有更好的结果,并导致包含 ASXL1 的 CMML 预后模型的进一步风险分层。
更新日期:2019-12-17
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