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MYC-rearranged mature B-cell lymphomas in children and young adults are molecularly Burkitt Lymphoma
Blood Cancer Journal ( IF 12.9 ) Pub Date : 2024-10-07 , DOI: 10.1038/s41408-024-01153-0
Sara Mato, Natalia Castrejón-de-Anta, Ariadna Colmenero, Lorenzo Carità, Julia Salmerón-Villalobos, Joan Enric Ramis-Zaldivar, Ferran Nadeu, Noelia Garcia, Luojun Wang, Jaime Verdú-Amorós, Mara Andrés, Nuria Conde, Verónica Celis, Maria José Ortega, Ana Galera, Itziar Astigarraga, Vanesa Perez-Alonso, Eduardo Quiroga, Aixiang Jiang, David W. Scott, Elias Campo, Olga Balagué, Itziar Salaverria

Aggressive B-cell non-Hodgkin lymphomas (NHL) in children, adolescents, and young adults (CAYA) include Burkitt lymphoma (BL), diffuse large B-cell lymphoma (DLBCL), and a subset of high-grade tumors with features intermediate between these entities whose genetic and molecular profiles have not been completely elucidated. In this study, we have characterized 37 aggressive B-NHL in CAYA, 33 with high-grade morphology, and 4 DLBCL with MYC rearrangement (MYC-R), using targeted next-generation sequencing and the aggressive lymphoma gene expression germinal center B-cell-like (GCB), activated B-cell-like (ABC), and dark zone signatures (DZsig). Twenty-two tumors had MYC-R without BCL2 breaks, and two MYC-non-R cases had BCL6 translocations. MYC-R cases, including DLBCL, carried BL-related mutations and copy number alterations. Conversely, MYC-non-R lymphomas had alterations in the B-cell receptor signaling/NF-κB pathway (71%). DZsig was expressed in 12/13 of MYC-R tumors but only in 2/10 of MYC-non-R GCB tumors (P < 0.001). The 3-year event-free survival (EFS) of the whole cohort was 79.6%. TP53 and KMT2C mutations conferred inferior outcome (3-year EFS P < 0.05). Overall, MYC-R lymphomas in CAYA have a molecular profile similar to BL regardless of their high-grade or DLBCL morphology, whereas MYC-non-R has more heterogeneous genetic alterations closer to that of DLBCL.



中文翻译:


儿童和年轻人的 MYC 重排成熟 B 细胞淋巴瘤分子上称为伯基特淋巴瘤



儿童、青少年和年轻人 (CAYA) 的侵袭性 B 细胞非霍奇金淋巴瘤 (NHL) 包括伯基特淋巴瘤 (BL)、弥漫性大 B 细胞淋巴瘤 (DLBCL) 和一部分高级别肿瘤,其特征介于这些实体之间,其遗传和分子特征尚未完全阐明。在这项研究中,我们使用靶向下一代测序和侵袭性淋巴瘤基因表达生发中心 B 细胞样 (GCB) 、活化 B 细胞样 (ABC) 和暗区特征 (DZsig) 表征了 CAYA 中的 37 例侵袭性 B-NHL,其中 33 例具有高级别形态,4 例 DLBCL 具有 MYC 重排 (MYC-R)。22 例肿瘤有 MYC-R 没有 BCL2 断裂,2 例 MYC-non-RBCL6 易位。MYC-R 病例,包括 DLBCL,携带 BL 相关突变和拷贝数改变。相反,MYC-非 R 淋巴瘤的 B 细胞受体信号转导/NF-κB 通路发生改变 (71%)。DZsig 在 12/13 的 MYC-R 肿瘤中表达,但在 MYC-non-R GCB 肿瘤中仅表达 2/10 (P < 0.001)。整个队列的 3 年无事件生存率 (EFS) 为 79.6%。TP53KMT2C 突变的结局较差 (3 年 EFS P < 0.05)。总体而言,CAYA 中的 MYC-R 淋巴瘤具有与 BL 相似的分子谱,无论其高级别或 DLBCL 形态如何,而 MYC-non-R 具有更接近 DLBCL 的异质性遗传改变。

更新日期:2024-10-07
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