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在CBFA2T3-GLIS2驱动的儿科急性巨核细胞白血病中,通过增强剂甲基化进行转录重新连接

Samrat Roy Choudhury¹, Akhilesh Kaushal¹, Pritam Biswas¹

¹Pediatric Hematology-Oncology, Department of Pediatrics, Arkansas Children's Research Institute, University of Arkansas for Medical Sciences, Little Rock, AR 72202, USA.

Genes & diseases

|October 27, 2025

概括

患有CBFA2T3-GLIS2 (C/G) 融合的儿科急性髓性白血病 (pAML) 显示了DNA甲基化和基因表达的改变. 向DNMT3B可能会克服这种高风险亚型的治疗耐药性.

科学领域:

在瘤学瘤学.
表观遗传学在表观遗传学中,表观遗传学是指表观遗传学.
分子生物学分子生物学

背景情况:

患有CBFA2T3-GLIS2 (C/G) 融合的儿科急性髓性白血病 (pAML) 由于化学疗法耐药性和复发而构成重大治疗挑战.
了解潜在的分子机制对于开发向疗法至关重要.

研究的目的:

为了阐明由急性巨核细胞白血病中C/G融合驱动的表观遗传变化.
确定潜在的治疗点,以克服C/G融合阳性pAML的治疗抵抗.

主要方法:

多omics分析包括DNA甲基化分析和对患者样本 (n=24) 和细胞系的基因表达分析.
染色体免疫沉测序 (ChIP-seq) 用于识别C/G融合结合部位.
功能性测试评估DNMT3B抑制的影响.

主要成果:

C / G 融合诱导了广泛的 DNA 甲基化变化,并激活了 cis 调节元件 (CREs) 的瘤增强剂.
在C/G+ pAML.中观察到一种明显的超甲基化模式,在上调调的基因的促进者中,富含着粘附性,TGFβ和Wnt信号通路.
在DNMT3B促进体附近的C/G融合结合与DNMT3B表达的增加相关,有助于异常DNA甲基化.
DNMT3B的抑制使C/G+白血病细胞对BCL2阻断产生敏感性,从而增强了亡.

结论:

C/G融合通过改变DNA甲基化和染色质可访问性来重塑pAML中的表观遗传景观,影响关键信号通路.
在驱动C/G+pAML的异常表观遗传修饰中,DNMT3B起着至关重要的作用.
向DNMT3B是一个有前途的治疗策略,可以在这种高风险的儿科白血病亚型中克服亡性抵抗.

关键词:

急性大细胞白血病急性大细胞白血病.急性骨髓性白血病 (AML) 是一种急性骨髓性白血病.在CBFA2T3-GLIS2中.通过DNA甲基化.增强器增强器增强器这些是cis-regulatory元素.

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