单细胞多组学揭示了DNMT3A和TET2突变克隆性血液形成在炎症反应中的不同影响
Wazim Mohammed Ismail1,2, Jenna A Fernandez3, Moritz Binder1,3
1Department of Laboratory Medicine and Pathology, Epigenomics Program, Center for Individualized Medicine, Mayo Clinic, Rochester, MN.
Blood advances
|December 4, 2024
概括
在克隆性血液形成 (CH) 中常见的DNMT3A突变加剧了COVID-19的结果. DNMT3A突变CH与ARDS和死亡率的增加有关,这是由炎症原始化和IL-32过度表达驱动的.
科学领域:
- 遗传学 遗传学 是一个
- 免疫学 免疫学 免疫学
- 血液学 血液学 血液学
背景情况:
- 克隆性血液形成 (CH) 涉及DNMT3A和TET2.2等表观遗传调节者的突变.
- 尽管这些突变具有相反的功能,但与较高的死亡率和较低的瘤风险相关.
- 这些突变的人类表型复杂性仍然不清楚,特别是在COVID-19等炎症事件期间.
研究的目的:
- 调查CH中DNMT3A突变与COVID-19相关的炎症发病率和死亡率的关联.
- 阐明DNMT3A突变与COVID-19不良结果联系的细胞和分子机制.
主要方法:
- 采用了单细胞蛋白质组学和多细胞组学测序.
- 分析的重点是患有COVID-19炎症反应的患者.
- 表观遗传学分析评估了增强剂的可访问性和基因表达的变化.
主要成果:
- DNMT3A突变CH证明了对COVID-19相关的ARDS和死亡率的年龄独立的负面影响.
- 在髓状细胞和淋巴状细胞中都发现了突变.
- 观察到因突变细胞中增强的染色质可访问性导致的过度表达interleukin-32 (IL-32).
结论:
- DNMT3A突变CH对COVID-19的预后产生负面影响,增加ARDS和死亡风险.
- 炎症转录原始化和IL-32过度表达是关键机制.
- DNMT3A突变CH可能作为COVID-19不良结果的生物标志物.
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