在一般人群中DDX41基因变异的发病率和重要性
Sruthi Cheloor Kovilakam1,2, Muxin Gu1,2, William G Dunn1,2,3
1Wellcome-MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, United Kingdom.
Blood
|July 28, 2023
概括
在DDX41基因中的生殖系变异显著增加患有骨髓质疏松综合征 (MDS) 和急性骨髓性白血病 (AML) 的风险. 较高的平均红细胞体积和体质DDX41突变可以帮助识别具有更高风险的载体.
科学领域:
- 遗传学和基因组学 遗传学和基因组学
- 血液学 血液学 血液学
- 在瘤学瘤学.
背景情况:
- 在DDX41基因中的生殖系变异与骨髓质疏松综合征 (MDS) 和急性骨髓性白血病 (AML) 相关.
- 不同的DDX41变体的特定风险,致病机制和对血液形成的影响尚未得到充分了解.
- 与其他癌症的联系以及跨不同祖先的患病率需要进一步调查.
研究的目的:
- 调查DDX41变异的频率和意义在大规模的英国生物库队列中.
- 确定DDX41生殖系致病变体 (DDX41-GPV) 与MDS/AML风险和其他癌症的关联.
- 探索不同的进化路径,克隆造血 (CH) 和DDX41-突变MDS/AML的潜在早期检测标记.
主要方法:
- 在454,792名英国生物库参与者中分析了生殖系DDX41变体.
- 使用多变量逻辑回归的关联研究将DDX41-GPV与血液恶性瘤和家族病史联系起来.
- 克隆性血液形成的流行率和偶发性和DDX41-突变型AML之间的体质突变率的比较.
主要成果:
- 在3538个个体中确定了452个独特的非同义DDX41变体,其流行率因祖先而异.
- 携带DDX41-GPV的携带者患MDS/AML的几率增加了12.3倍,启动丢失,截断和误解变种具有显著的风险.
- 在DDX41-GPV携带者中没有观察到CH的患病率增加;较高的平均红细胞体积 (MCV) 和体质DDX41突变确定了具有增加风险的携带者.
结论:
- DDX41变种是MDS/AML的重要风险因素,与零星病例相比,它们具有明显的进化模式.
- 基因组不稳定不是DDX41-突变AML的驱动因素.
- 更高的MCV和体质DDX41突变可以作为在DDX41-GPV载体中早期检测MDS/AML的潜在生物标志物.
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