病原体和人类NDPK蛋白通过单细胞NLRP3-炎症酶激活促进AML细胞存活
Sandro Trova1, Fei Lin1, Santosh Lomada2
1School of Biosciences, University of Birmingham, Birmingham, United Kingdom.
PloS one
|July 7, 2023
概括
病原体衍生的核酸二酸激酶 (NDPK) 模仿人类的NM23-H1,促进急性髓性白血病 (AML) 细胞存活. 这些细菌NDPK通过NLRP3炎症体激活单细胞,涉及AML和骨髓质综合征 (MDS) 发病的感染.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 微生物学 微生物学
背景情况:
- 感染与急性髓性白血病 (AML) 和骨髓质综合征 (MDS) 的风险增加和并发症有关.
- 人类核二酸激酶NM23-H1通过诱导IL-1β分泌促进AML爆细胞生存.
- 病原性细菌分泌的核酸二酸盐激酶 (NDPKs) 参与宿主-病原体相互作用.
研究的目的:
- 调查病原体衍生的NDPKs在AML和MDS病原发生中的作用.
- 为了确定病原体NDPK是否可以模仿人类NM23-H1在AML细胞上的亲存活活性.
- 阐明NDPK介导单细胞激活的机制.
主要方法:
- 在AML患者和健康捐赠者中检测对病原体NDPK的抗体.
- 评估病原体NDPK蛋白对初级AML细胞的影响.
- 流细胞测量以确定与单细胞结合的NDPK.
- 使用差异化THP1细胞来模拟NDPK介导的IL-1β通过NLRP3炎症和卡斯帕酶1分泌.
主要成果:
- 患有AML的个体和健康的捐赠者表现出对病原体NDPKs的抗体,表明体内暴露.
- 病原体NDPK蛋白促进AML细胞的存活,模仿人类的NM23-H1.1.
- 病原体和人类NDPK选择性地与单细胞结合.
- 从单细胞中产生NDPK诱导的IL-1β分泌是NLRP3炎症体和caspase 1依赖的,但TLR4独立.
- NDPKs在单细胞中激活NF-κB和IRF通路,而不会诱导热亡.
结论:
- 病原体衍生的NDPKs通过促进癌细胞存活和激活单细胞,在AML和MDS病原发生过程中发挥作用.
- NLRP3炎症酶和IL-1β是NDPK诱导的单细胞反应的关键调解者,与AML/MDS相关.
- 这些发现突出了细菌感染与骨髓性恶性瘤的发展/进展之间的新联系.
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