由急性髓性白血病衍生的细胞外囊泡诱导的DNA甲基化变化,在正常的造血干细胞前代细胞中负责炎症程序
Daniela Lamorte1, Giovanni Calice1, Stefania Trino1
1Laboratory of Preclinical and Translational Research, IRCCS Centro di Riferimento Oncologico della Basilicata (CROB), Rionero in Vulture (PZ), Italy.
Frontiers in immunology
|April 25, 2025
概括
急性髓性白血病 (AML) 细胞释放细胞外囊泡 (EVs),改变健康的造血干细胞 (HSPCs) 中的DNA甲基化. 这种表观基因组重编程会影响参与炎症和血液形成的基因,可能导致类似白血病的变化.
科学领域:
- 血液学 血液学 血液学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 癌症生物学 癌症生物学
背景情况:
- 急性髓性白血病 (AML) 细胞与骨髓微环境相互作用,包括造血干细胞 (HSPC),以促进瘤生长.
- 细胞外囊泡 (EVs) 调解细胞间通信,携带来自AML细胞的分子载荷.
- 异常的DNA甲基化是AML的标志,但其通过AML衍生的EV对HSPCs的影响尚不清楚.
研究的目的:
- 调查AML衍生的EVs对健康HSPCs的DNA甲基化概况的影响.
- 为了确定受这种表观基因组修饰影响的特定基因和途径.
主要方法:
- HSPC暴露于AML细胞系衍生的EVs.
- 使用甲基化阵列分析了DNA甲基化概况.
- 将基因表达特征进行比较,以识别不同甲基化和表达的基因 (dmGs和deGs).
- 用基因本体学分析和数字PCR进行进一步调查.
主要成果:
- 在HSPC中,AML-EV诱导了显著的DNA甲基化变化,包括促进体和身体区域的低甲基化.
- 受影响的基因在与血液形成,免疫,炎症和AML相关的途径中得到了丰富.
- 包括DSE,SEMA4A,NFKB1,MTSS1,SLA和CUTA在内的20个基因的一个子集显示出一致的甲基化和表达变化.
- 这些基因涉及至关重要的通路,如NF-kB信号传递和Toll类受体信号传递.
结论:
- 源自AML的EV可以通过改变DNA甲基化来表观遗传地重编程HSPC.
- 这种重编程调节基因表达,可能会将正常的血液形成转向类似白血病的过程.
- 这项研究提供了AML-EV诱导的HSPC表观基因组修饰的第一个证据.
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