有证据表明,来自输血依赖β-血病患者的血小板诱导T细胞激活
Elena E Solomou1, Polyxeni Delaporta2, Aimilia Mantzou2
1University of Patras Medical School, Department of Internal Medicine, Rio 26500, Greece.
Clinical immunology (Orlando, Fla.)
|June 3, 2023
概括
来自输血依赖β-thalassemia (TDT) 患者的血小板激活T细胞,增加血栓形成的风险. 这种血小板激活与调节性T细胞 (Treg) 扩张相关,有可能减轻TDT中的免疫失调.
科学领域:
- 血液学 血液学 血液学
- 免疫学 免疫学 免疫学
- 血栓形成的原因是血栓形成.
背景情况:
- 输血依赖β-thalassemia (TDT) 与高凝血状态和血栓事件有关.
- 活化血小板在TDT患者中更常见,但它们在T细胞激活中的作用尚不清楚.
研究的目的:
- 调查TDT患者的血小板是否可以激活T细胞.
- 探索TDT中血小板激活,T细胞激活和调节性T细胞 (Tregs) 之间的关系.
主要方法:
- 在体外化T细胞与来自TDT患者和健康个体的血小板.
- 对T细胞激活标志物CD69和调控性T细胞 (Treg) 的流细胞计分析.
- 对血小板激活标记物的测量 (sP-选择素,suPAR,GDF-15).
主要成果:
- 与TDT血小板化的T细胞与对照组相比显著增加了CD69的表达.
- 切除术的TDT患者表现出更高的T细胞激活.
- TDT患者的Treg百分比增加,与血小板诱导的T细胞激活 (非阿司匹林使用者) 有积极的相关性.
- 在TDT患者中观察到高水平的sP-选择素,suPAR和GDF-15.
结论:
- 来自TDT患者的血小板可以在体外激活T细胞.
- 这种由血小板驱动的T细胞激活与Tregs和血小板激活标志物的增加有关.
- 研究结果表明,在TDT中,血小板激活与免疫调节之间存在一种机制,可能是作为补偿反应.
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