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单细胞 - 氨基酸信号轴促进了疫苗介导的防治SARS-CoV-2的保护

Kathryn M Moore^1,2, Stephanie L Foster^1,2, Meenakshi Kar^1,2

¹Emory Vaccine Center, Emory National Primate Research Center, Emory UniversityAtlanta, GeorgiaUnited States of America.

|December 2, 2025

概括

接种COVID-19疫苗提供了保护,但突破性感染揭示了独特的免疫反应. 在低剂量疫苗接种后,在SARS-CoV-2感染期间,埃索诺菲尔在肺部起着保护作用.

科学领域:

免疫学免疫学免疫学
疫苗学疫苗学疫苗学
呼吸道感染呼吸道感染

背景情况:

COVID-19疫苗对严重疾病是有效的.
中和抗体与对抗SARS-CoV-2的保护相关.
了解疫苗突破性感染中的免疫反应至关重要.

研究的目的:

在高剂量或低剂量接种疫苗后感染SARS-CoV-2后,研究小鼠肺部早期免疫反应.
在疫苗突破性感染中描述先天性免疫细胞,特别是埃索诺菲尔的作用.

主要方法:

传统的实验室小鼠模型与高剂量和低剂量疫苗接种.
在SARS-CoV-2感染的挑战.
对肺部先天免疫细胞流入的分析.
单细胞转录概况. 单细胞转录概况.
抗体介导的埃索诺菲尔细胞的消耗.

主要成果:

低剂量接种疫苗的小鼠在独特的炎症环境中显示出部分保护,包括显著的乙氨基酸透.
病毒RNA主要与低剂量疫苗接种的小鼠中的埃索诺菲尔相关.
乙氨基酸表现出IFN-γ偏差的特征,并与单细胞进行通信.
乙氨基细胞的枯竭导致病毒复制和传播的增加.

结论:

在接种疫苗的小鼠中,在SARS-CoV-2感染期间,乙氨基酸表现出保护作用,特别是在低剂量疫苗接种场景中.
与初级感染相比,疫苗突破性感染会引起不同的定量和定性免疫反应.

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