微生物代谢物通过ALPK1驱动与衰老相关的克隆性血液形成
Puneet Agarwal1, Avery Sampson1, Kathleen Hueneman1
1Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
Nature
|April 24, 2025
概括
与年龄相关的肠道变化释放一种细菌代谢物ADP- 肝素,该代谢物驱动不确定潜力的克隆性血液形成 (CHIP) 中的白血病前细胞的扩张. 向ADP- 肝素- ALPK1通路可能会阻止CHIP的进展.
科学领域:
- 血液学
- 微生物学
- 免疫学
背景情况:
- 不确定潜力的克隆性血液形成 (CHIP) 涉及白血病前细胞扩张,随着年龄和疾病风险的增加.
- 在老化过程中CHIP的进展驱动因素和环境因素尚不清楚.
- CHIP与所有原因的死亡率和心血管风险增加有关.
研究的目的:
- 调查衰老,肠道变化和CHIP进展之间的联系.
- 鉴定导致白血病前细胞扩张的微生物因素.
- 阐明这些因素促进CHIP的机制.
主要方法:
- 在CHIP老年人中分析微生物代谢物.
- 在体外和体内研究ADP-肝素对白血病前细胞扩张的影响.
- 研究ADP- 肝糖与它的受体ALPK1和下游信号通路的相互作用.
主要成果:
- 细菌代谢物ADP- D- 葡萄糖β- D- 曼诺- 肝素 (ADP- 肝素) 在老年人中升高,并促进白血病前细胞扩张.
- 在CHIP中,ADP- 肝糖的积累与炎症和心血管风险的增加有关.
- ADP- 肝糖与ALPK1结合,激活NF- kB,并为白血病前细胞提供增殖优势.
结论:
- 在衰老过程中,肠道的变化会通过释放ADP- 肝素,一种促进白血病前细胞扩张的微生物代谢物来促进CHIP.
- ADP-肝素-ALPK1信号轴代表了衰老和CHIP进展之间的直接机制联系.
- 针对ADP-肝素-ALPK1通路提供了预防CHIP相关疾病的潜在治疗策略.
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