在9/11的第一响应者中,克隆性血液形成的升高具有与年龄有关的明显模式,并依赖IL1RAP进行克隆扩张
Divij Verma1, Rachel Zeig-Owens2,3,4, David G Goldfarb2,3,4
1Department of Oncology, Blood Cancer Institute, Albert Einstein College of Medicine, Montefiore Medical Center, Bronx, New York.
Cancer discovery
|October 1, 2025
概括
暴露于9/11世界贸易中心 (WTC) 尘埃的第一响应者具有更高的克隆性血液形成 (CH) 突变率. 这种血液状况显著增加了他们患白血病的风险,IL1RAP被确定为潜在的治疗点.
科学领域:
- 环境健康 环境健康
- 血液学 血液学 血液学
- 在瘤学瘤学.
背景情况:
- 环境暴露越来越多地与癌前血液病状有关.
- 对明确的暴露队伍的研究是有限的,这阻碍了对这些联系的理解.
- 9/11世界贸易中心 (WTC) 灾难提供了一个独特的队列,具有显著的环境暴露.
研究的目的:
- 调查暴露在WTC灾难中的第一响应者中的克隆性血液形成 (CH) 突变的患病率.
- 评估该队列中CH突变与白血病风险之间的关联.
- 探索环境诱导的CH的潜在分子机制和治疗点.
主要方法:
- 从暴露于WTC的第一响应者和对照队伍的血液样本的测序.
- 对突变流行率的分析,对年龄,种族和性别进行控制.
- 使用暴露在WTC颗粒物中的小鼠模型进行体内研究.
- 研究IL1RAP在CH克隆扩张中的作用.
主要成果:
- 与对照组相比,暴露于WTC的第一响应者显示CH突变的患病率明显更高.
- 年轻的响应者表现出非传统的CH突变与DNA修复缺陷.
- 暴露于WTC的CH的响应者患白血病的风险明显增加 (风险增加5.73倍).
- 在小鼠中,WTC颗粒物暴露损害了干细胞和扩展的Tet2-突变CH克隆.
- IL1RAP在小鼠CH中过度表达,其敲击抑制了突变克隆的生长.
结论:
- 离散的环境暴露,比如WTC灾难的环境暴露,与造血突变和白血病风险增加有关.
- 在年轻暴露个体中观察到明显的CH突变,包括具有DNA修复特征的突变.
- IL1RAP被确定为CH扩张的关键驱动因素,也是炎症驱动的恶性瘤的新治疗标.
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