多重骨髓瘤的外染色体圆形DNA
Fangfang Li1, Xinyi Long1, Sishi Tang1
1Department of Hematology, The Third Xiangya Hospital, Central South University, Changsha, 410013, China.
Journal of Cancer
|November 10, 2025
概括
多发性骨髓瘤 (MM) 中的外染色体圆形DNA (EccDNA) 显示出高异质性,并与耐药性有关. 17号染色体上特定的EccDNA基因,特别是CNP,有助于在MM中耐受波尔特佐米布的耐受性.
科学领域:
- 基因组学就是基因组学.
- 癌症生物学 癌症生物学
- 分子瘤学分子瘤学
背景情况:
- 外染色体圆形DNA (EccDNA) 在瘤中普遍存在,与耐药性和进展相关.
- 多发性骨髓瘤 (MM) 呈现出显著的瘤异质性,影响治疗结果.
研究的目的:
- 研究EccDNA在多发性骨髓瘤 (MM) 中的异质性和功能作用.
- 确定与EccDNA相关的基因,这些基因有助于MM的耐药性.
主要方法:
- 在不同疾病阶段的MM患者样本上进行了Circle-seq和mRNA-seq.
- 光在位混合 (FISH) 用于检测染色体异常.
- 西部斑点 (WB),CCK8和Annexin V-FITC/PI测定评估了基因功能和药物反应.
主要成果:
- 在MM样本中观察到高异质性和EccDNA的丰富性.
- 在mRNA表达和EccDNA数量之间没有发现直接相关性.
- 17号和19号染色体上的eccDNA基因发生了显著的变化,17号染色体显示出高密度的上调基因在复发性MM中具有del(17p).
- 来自第17号染色体的三个蛋白质编码基因被确定为MM的不良预后指标.
- 过度表达2',3'-循环核酸3'化酶 (CNP) 降低了MM细胞的亡并增加了博特佐米布的耐受性.
结论:
- 埃克克DNA分析揭示了MM的显著异质性,特别是在复发的病例中,del(17p).
- 像CNP这样的eccDNA基因,可能通过调节亡途径,导致MM患者的博特佐米布耐药性.
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