调查与COVID-19后急性后果相关的病毒和自身免疫T细胞反应
Gregory P Williams1, Esther Dawen Yu1, Kendra Shapiro1
1Division of Vaccine Discovery, La Jolla Institute for Immunology, La Jolla, San Diego, CA, USA.
Human immunology
|March 3, 2024
概括
COVID-19 (PASC) 后急性继发性神经症状与针对病毒或神经元点的改变T细胞反应无关. 需要在更大的队列中进行进一步的研究,以确认长期COVID患者的这些发现.
科学领域:
- 免疫学 免疫学 免疫学
- 神经科学是一个神经科学.
- 传染性疾病 传染性疾病
背景情况:
- COVID-19 (PASC) 或长期COVID的后急性后果呈现出令人衰弱的神经症状,如脑雾.
- 导致PASC神经并发症的致病机制在很大程度上是未知的.
- 研究免疫反应,特别是T细胞,对于理解PASC的病原性至关重要.
研究的目的:
- 为了比较PASC神经表现 (PASC-N) 个体与康复COVID-19个体的抗原特异性T细胞反应.
- 为了研究T细胞对SARS-CoV-2的反应性,潜伏病毒 (CMV,EBV) 和神经元抗原.
- 为了确定改变的T细胞反应是否有助于长期COVID的神经症状.
主要方法:
- 使用了激活诱导标记物 (AIM),细胞内细胞因子染色 (ICS) 和FluoroSpot测试.
- 分析了周围血液中CD4+和CD8+T细胞的反应.
- 对SARS-CoV-2 (Spike,蛋白质组),潜伏病毒和神经元抗原进行了T细胞特异性和大小的评估.
主要成果:
- 在PASC-N和康复个体之间,在抗原特异性T细胞频率上没有发现显著差异.
- 对于所有测试的抗原,在CD4+和CD8+T细胞组中发现了类似的细胞因子效应T细胞反应.
- 对SARS-CoV-2,潜伏病毒或神经元抗原的抗原特异性T细胞反应在组之间没有差异.
结论:
- 帕斯克神经表现 (PASC-N) 似乎与改变的抗原特异性T细胞对研究目标的反应无关.
- 目前的发现表明,T细胞反应可能不是PASC队列中神经症状的主要驱动因素.
- 需要进行更大规模的研究来验证这些结果,并探索长期COVID的其他潜在机制.
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