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重组SARS-CoV-2尖端蛋白变体对血小板形态和激活的影响
Marco Vettori1, Giovanni Carpenè1, Gian Luca Salvagno1
1Section of Clinical Biochemistry and School of Medicine, University of Verona, Verona, Italy.
不同的严重急性呼吸道综合征冠状病毒2 (SARS-CoV-2) 尖端蛋白变体影响血小板计数和激活. 德尔塔和阿尔法变种对血小板枯竭和聚合表现出最显著的影响.
科学领域:
- 血液学 血液学 血液学
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
背景情况:
- 血小板在血液静止和血栓形成中至关重要,特别是在2019年冠状病毒疾病 (COVID-19) 中.
- 严重急性呼吸系统综合征冠状病毒2 (SARS-CoV-2) 尖端蛋白与COVID-19的病原发生有关.
研究的目的:
- 调查不同SARS-CoV-2复合尖端蛋白变体如何影响血小板形态和激活.
- 为了比较Ancestral,Alpha,Delta和Omicron变种对血小板功能的影响.
主要方法:
- 来自健康受试者的全血样本暴露于不同度 (2和20 ng/mL) 的SARS-CoV-2重组尖端蛋白 (祖先,阿尔法,三角形,奥米克朗) 或盐水对照.
- 分析了血小板计数,平均血小板体积,血小板功能 (使用血小板功能分析仪-200) 和形态变化 (包括总量).
主要成果:
- 所有测试的SARS-CoV-2尖端蛋白质变体都减少了血小板数量,而三角洲变体显示出最显著的减少.
- 平均血小板体积在所有变体中都增加,特别是在Delta和Alpha.
- 血小板功能测试表明血小板耗尽,对德尔塔和阿尔法变种观察到更高的增加.
- 形态分析显示血小板激活,凝聚和血小板-白细胞聚合的增加,特别是在阿尔法和三角形变体.
结论:
- SARS-CoV-2尖端蛋白激活血小板,导致COVID-19中血栓形成的风险.
- 观察到的对血小板激活和形态的影响因特定的SARS-CoV-2尖端蛋白变体而异.
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