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Clonal hematopoiesis in large granular lymphocytic leukemia
Leukemia ( IF 12.8 ) Pub Date : 2024-11-21 , DOI: 10.1038/s41375-024-02460-y
Naomi Kawashima, Carmelo Gurnari, Carlos Bravo-Perez, Yasuo Kubota, Simona Pagliuca, Luca Guarnera, Nakisha D. Williams, Arda Durmaz, Arooj Ahmed, Danai Dima, Fauzia Ullah, Hetty E. Carraway, Abhay Singh, Valeria Visconte, Jaroslaw P. Maciejewski

Past studies described occasional patients with myeloid neoplasms (MN) and coexistent large granular lymphocytic leukemia (LGLL) or T-cell clonopathy of unknown significance (TCUS), which may represent expansion of myeloid clonal hematopoiesis (CH) as triggers or targets of clonal cytotoxic T cell reactions. We retrospectively analyzed 349 LGLL/TCUS patients, 672 MN patients, and 1443 CH individuals to establish the incidence, genetic landscape, and clinical phenotypes of CH in LGLL. We identified 8% of cases overlapping with MN, while CH was found in an additional 19% of cases (CH + /LGLL) of which TET2 (23%) and DNMT3A (14%) were the most common. In MN cohort, 3% of cases showed coexistent LGLL. The incidence of CH in LGLL was exceedingly higher than age-matched CH controls (P < 0.0001). By multivariate analysis, the presence of CH in LGLL (P = 0.026) was an independent risk factor for cytopenia in addition to older age (P = 0.003), splenomegaly (P = 0.015) and STAT3/5B mutations (P = 0.001). CH + /LGLL cases also showed a higher progression rate to MN than CH-/LGLL (10% vs. 2% at 5 years; P = 0.02). A close relationship between CH and LGLL suggests that cytopenia in LGLL may be not only related to LGLL but be also secondary to coexisting clonal cytopenia of unclear significance.



中文翻译:


大颗粒淋巴细胞白血病的克隆造血



过去的研究描述了偶尔患有髓系肿瘤 (MN) 和并存的大颗粒淋巴细胞白血病 (LGLL) 或意义不明的 T 细胞克隆病 (TCUS) 的患者,这可能代表髓系克隆造血 (CH) 的扩增作为克隆性细胞毒性 T 细胞反应的触发或靶标。我们回顾性分析了 349 例 LGLL/TCUS 患者、672 例 MN 患者和 1443 例 CH 个体,以确定 LGLL 中 CH 的发病率、遗传景观和临床表型。我们确定了 8% 的病例与 MN 重叠,而另外 19% 的病例 (CH + /LGLL) 发现了 CH,其中 TET2 (23%) 和 DNMT3A (14%) 是最常见的。在 MN 队列中,3% 的病例显示共存 LGLL。LGLL 中 CH 的发生率极高于年龄匹配的 CH 对照 (P < 0.0001)。通过多变量分析,除了高龄 (P = 0.003)、脾肿大 (P = 0.015) 和 STAT3/5B 突变 (P = 0.001) 之外,LGLL 中存在 CH (P = 0.026) 是血细胞减少症的独立危险因素。CH + /LGLL 病例也显示 MN 的进展率高于 CH-/LGLL(5 年时为 10% vs. 2%;P = 0.02)。CH 和 LGLL 之间的密切关系表明,LGLL 中的血细胞减少可能不仅与 LGLL 有关,而且还继发于意义不明的共存克隆性血细胞减少。

更新日期:2024-11-22
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