Rpl13a snoRNAs调节的NADPH氧化酶1依赖的ROS生成:一种新的红细胞通路介导补充C3a沉积,并在衰老和静脉血液凝固障碍中引发血栓形成
Waseem Chauhan1, Shirin Ferdowsi1, S J Sudharshan1
1Department of Physiology, University of Tennessee Health Science Center, Memphis, TN, 38163, USA.
Free radical biology & medicine
|February 12, 2025
概括
老龄化增加了静脉血栓形成的风险. 来自老年人的红细胞 (RBC) 显示补充C3a沉积,通过活性氧物种 (ROS) 触发凝血. Rpl13a的snoRNAs调节了这个过程,为血栓形成提供了潜在的治疗点.
科学领域:
- 血液学 血液学 血液学
- 免疫学 免疫学 免疫学
- 老年学是一门学科.
背景情况:
- 45岁以上的成年人面临更高的静脉血栓/血栓栓塞的风险.
- 与氧化应激相关的补充激活,是静脉血栓形成的核心.
- 红细胞 (RBC) 在补充激活和衰老中的血栓形成中的作用尚不清楚.
研究的目的:
- 研究红细胞对补充激活和衰老中的血栓形成的贡献.
- 探索将红细胞,氧化应激和老年人静脉血栓症联系在一起的机制.
主要方法:
- 对年轻成年人,中年成年人和静脉血栓症患者的红细胞进行分析,以确定补充C3 / C3a沉积和NADPH氧化酶 (Nox) 1表达.
- 评估红细胞中前激活,活性氧物种 (ROS) 生成和G蛋白结合受体激酶2 (GRK2) 激活.
- 使用Rpl13asnoRNA淘汰老年小鼠进行体内研究,以评估血栓形成和红细胞C3a沉积.
主要成果:
- 来自中年成人和血栓形成患者的红血细胞显示C3/C3a沉积和Nox1表达增加,与通过ROS和GRK2激活前列血相关联.
- C3/C3a阳性红细胞与内皮细胞的相互作用增加了内皮ROS的产生.
- 通过调节Nox1mRNA表达,Rpl13asnoRNA被确定为红细胞C3a沉积和老化中的前血栓激活的关键调节者,敲击减少了小鼠中的血栓大小.
结论:
- 红细胞在补体激活和老化中的血栓形成中发挥着重要作用.
- Rpl13a snoRNAs是通过控制红细胞中ROS诱导的C3a沉积来控制与年龄相关的静脉血栓的新型调节者.
- 向红细胞Rpl13asnoRNAs可能为预防老年人静脉血栓形成提供了一个新的治疗策略.
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