对P2Y受体功能的研究来自患有败血症的患者的血小板
Kate L Arkless1, Matthew Fish, Aislinn Jennings
1Sackler Institute of Pulmonary Pharmacology, Institute of Pharmaceutical Science, King's College London, London, United Kingdom.
Shock (Augusta, Ga.)
|July 5, 2023
概括
败血症患者的血小板失去了关键的炎症功能,特别是化学毒性,同时保持正常的聚合. 这种依赖P2Y1受体的炎症缺陷在整个住院期间持续存在,影响了败血症中的免疫反应调节.
科学领域:
- 免疫学 免疫学 免疫学
- 血液学 血液学 血液学
- 关键护理医学 关键护理医学
背景情况:
- 败血症涉及静血功能障碍和炎症,血小板在两个过程中都发挥着双重作用.
- 血小板功能,特别是P2Y受体 (P2YR) 激活,对于它们的静血和炎症作用至关重要.
- 了解败血症期间血小板功能的改变对于管理这种危及生命的疾病至关重要.
研究的目的:
- 为了调查P2YR依赖的血小板的静血和炎症功能是否在败血症患者中发生变化.
- 为了比较败血症患者的血小板功能与那些经历轻度无菌炎症 (心脏手术患者) 的患者.
- 阐明败血症对血小板聚合和化疗作用的具体影响.
主要方法:
- 从败血症患者 (社区获得的肺炎),心脏手术患者和健康的捐赠者中分离出血小板.
- 在体外血小板聚合试验中,使用腺二酸盐 (ADP) 刺激进行了试验.
- 使用N-formylmethionyl-leucyl-phenylalanine (fMLP) 作为化学吸引剂进行了血小板化疗试验.
主要成果:
- 心脏手术和败血症都引起炎症,中性粒细胞增加,血小板减少的趋势.
- 针对ADP的血小板聚合在所有患者组和对照组中都保持不变.
- 来自败血症患者的血小板显示,对fMLP的化疗损失显著,从入院到出院持续.
结论:
- 来自败血症患者的血小板表现出受P2Y1受体依赖的炎症功能受损,特别是化学反应.
- 败血症中血小板炎症功能的这种损失与无菌炎症中观察到的变化不同.
- 需要进一步的研究来确定这是否由于血小板招募或在败血症中免疫失调.
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