在老年人脑球体中,SARS-CoV-2 Omicron 变种与野生型菌株相比显示了减弱的神经病毒性
Weikang Chen1,2, Xiaobing Jiang3, Wei Liang2
1Department of Neurosurgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510000, China.
Research (Washington, D.C.)
|May 14, 2024
概括
严重急性呼吸系统综合征冠状病毒2 Omicron变种会在老年人中引起神经问题. 在老年大脑模型中,与野生型菌株相比,Omicron变种显示神经炎症和神经损伤减少.
科学领域:
- 神经科学是一个神经科学.
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
背景情况:
- 严重急性呼吸系统综合征冠状病毒2 (SARS-CoV-2) Omicron变种继续在老年人中引起神经复发症.
- 对于Omicron变种对老年大脑的影响,特别是神经侵入性和神经毒性,仍然不太清楚.
研究的目的:
- 在老化大脑模型中研究SARS-CoV-2野生型 (WT) 和Omicron (BA.1/BA.2) 变异的神经生物学影响.
- 探索这些病毒菌株在老年大脑球状体中的复制能力,神经化和神经病原性.
主要方法:
- 从老年人的切除的瘤大脑组织生成初级大脑球状体 (BSs).
- 用活的SARS-CoV-2 WT和Omicron (BA.1/BA.2) 菌株感染BSs.
- 转录分析分析神经炎症反应和神经网络活动.
主要成果:
- 两种WT和Omicron菌株在老龄化BS中复制弱,在神经向上没有显著差异.
- 与WT菌株相比,Omicron BA.1/BA.2显示神经损伤减少,并诱导神经炎症反应较低.
- 这两种菌株都破坏了神经网络活动,导致神经元退化和粉样β沉积,与神经退行性疾病相关.
结论:
- 奥米克朗变种在老年大脑中表现出减弱的神经病原性,与减少神经炎症有关.
- 包括Omicron在内的SARS-CoV-2感染可以破坏神经网络,并导致神经退行性疾病中出现的病理.
- 这项研究阐明了老年人SARS-CoV-2引起的神经并发症中的Omicron特定机制和免疫反应.
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