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PHF6 mutations in chronic myelomonocytic leukemia identify a unique subset of patients with distinct phenotype and superior prognosis
American Journal of Hematology ( IF 10.1 ) Pub Date : 2024-09-27 , DOI: 10.1002/ajh.27492
Ayalew Tefferi, Saubia Fathima, Ali Khalid A. Alsugair, Fnu Aperna, Anuya Natu, Maymona G. Abdelmagid, Clifford M. Csizmar, Mark Gurney, Terra L. Lasho, Christy M. Finke, Abhishek A. Mangaonkar, Aref Al-Kali, Animesh Pardanani, Kaaren K. Reichard, Rong He, Naseema Gangat, Mrinal M. Patnaik

The current study was inspired by observations from exploratory analyses of an institutional cohort with chronic myelomonocytic leukemia (CMML; N = 398) that revealed no instances of blast transformation in the seven patients with plant homeodomain finger protein 6 (PHF6) mutation (PHF6MUT). A subsequent Mayo Clinic enterprise-wide database search identified 28 more cases with PHF6MUT. Compared with their wild-type PHF6 counterparts (PHF6WT; N = 391), PHF6MUT cases (N = 35) were more likely to co-express TET2 (89% vs. 45%; p < .01), RUNX1 (29% vs. 14%; p = .03), CBL (14% vs. 2%; p < .01), and U2AF1 (17% vs. 6%; p = .04) and less likely SRSF2 (23% vs. 45%; p < .01) mutation. They were also more likely to display loss of Y chromosome (LoY; 21% vs. 2%; p < .01) and platelets <100 × 109/L (83% vs. 51%; p < .01). Multivariable analysis identified PHF6MUT (HR 0.28, 95% CI 0.15–0.50) and DNMT3AMUT (HR 5.8, 95% CI 3.3–10.5) as the strongest molecular predictors of overall survival. The same was true for blast transformation-free survival with corresponding HR (95% CI) of 0.08 (0.01–0.6) and 9.5 (3.8–23.5). At median 20 months follow-up, blast transformation was documented in none of the 33 patients with PHF6MUT/DNMT3AWT but in 6 (32%) of 19 with DNMT3AMUT and 74 (20%) of 374 with PHF6WT/DNMT3AWT (p < .01). The specific molecular signatures sustained their significant predictive performance in the context of the CMML-specific molecular prognostic model (CPSS-mol). PHF6MUT identifies a unique subset of patients with CMML characterized by thrombocytopenia, higher prevalence of LoY, and superior prognosis.

中文翻译:


慢性粒单核细胞白血病中的 PHF6 突变可识别具有不同表型和良好预后的独特患者亚群



本研究的灵感来自对慢性粒单核细胞白血病 (CMML;N = 398),该研究显示 7 例植物同源域手指蛋白 6 (PHF6) 突变 (PHF6MUT) 患者没有原始细胞转化实例。随后的妙佑医疗国际企业范围的数据库搜索确定了另外 28 例 PHF6MUT。与野生型 PHF6 对应物 (PHF6WT;N = 391),PHF6MUT 病例 (N = 35) 更有可能共表达 TET2 (89% vs. 45%;p < .01)、RUNX1 (29% 对 14%;p = .03)、CBL (14% 对 2%;p < .01) 和 U2AF1 (17% 对 6%;p = .04) 和不太可能的 SRSF2 (23% vs. 45%;p < .01) 突变。他们也更有可能显示 Y 染色体丢失 (LoY;21% 对 2%;p < .01) 和血小板 <100 × 109/L (83% vs. 51%;p < .01)。多变量分析确定 PHF6MUT (HR 0.28,95% CI 0.15-0.50) 和 DNMT3AMUT (HR 5.8,95% CI 3.3-10.5) 是总生存期的最强分子预测因子。无原始细胞转化生存率也是如此,相应的 HR (95% CI) 为 0.08 (0.01-0.6) 和 9.5 (3.8-23.5)。在中位 20 个月的随访中,33 例 PHF6MUT/DNMT3AWT 患者中均未记录原始细胞转化,但 19 例 DNMT3AMUT 患者中有 6 例 (32%) 和 374 例 PHF6WT/DNMT3AWT 中有 74 例 (20%) (p < .01)。 在 CMML 特异性分子预后模型 (CPSS-mol) 的背景下,特异性分子特征保持了其显著的预测性能。PHF6MUT 确定了以血小板减少症、LoY 患病率较高和预后优越为特征的 CMML 患者独特亚群。
更新日期:2024-09-27
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