接收mRNA或完全接种CoronaVac疫苗后失活的疫苗助推剂的个体中的B细胞亚型:一项纵向研究
Zeynep Ece Kuloğlu1,2, Zeynep Gülçe Talay1,2, Özgür Albayrak3
1Koç University IsBank Research Center for Infectious Diseases (KUISCID), İstanbul, Türkiye.
Infectious diseases & clinical microbiology
|April 18, 2024
概括
包括BNT162b2和CoronaVac在内的COVID-19助推疫苗显著增加了B细胞的记忆力. BNT162b2助推剂显示出更高的IgG+记忆B细胞,而CoronaVac助推剂导致更有效的B细胞在接种疫苗后一个月.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 细胞生物学 细胞生物学
背景情况:
- 了解COVID-19疫苗接种后的B细胞动态对于评估疫苗疗效至关重要.
- 同源 (相同的疫苗类型) 和异源 (不同的疫苗类型) 促进策略引起不同的免疫反应.
- B细胞亚群在适应性免疫和长期免疫记忆中起着至关重要的作用.
研究的目的:
- 调查同源和异源COVID-19强剂疫苗对B细胞亚群的影响.
- 为了比较BNT162b2 (Pfizer-BioNTech) 和CoronaVac (Sinovac) 助推剂对天真,记忆和效应性B细胞的影响.
- 为了分析记忆B细胞表达IgG的变化,在增强剂后进行IgG表达.
主要方法:
- 参与者在基线和接受BNT162b2或CoronaVac增剂后的1个月和3个月内收集了血液样本.
- 用流细胞计分离和分析了周围血液单核细胞 (PBMC).
- 具体的B细胞种群,包括天真,记忆,IgG+记忆和效应记忆B细胞,根据表面标记物表达量化 (CD19,CD20,CD27,IgG,CD38).
主要成果:
- 无论是BNT162b2还是CoronaVac,都显著增加了接种疫苗后一个月内存B细胞的比例.
- 在一个月内,BNT162b2增强剂导致IgG表达记忆B细胞的百分比明显高于CoronaVac增强剂.
- 在CoronaVac助推剂后一个月,与BNT162b2助推剂相比,观察到效应B细胞的比例更高.
结论:
- 无论是哪种类型的COVID-19增强疫苗,都能有效地增强记忆B细胞群.
- 与BNT162b2的异质增强剂相比,与同源的CoronaVac增强剂相比,BNT162b2的异质增强剂可能会在短期内诱导更强大的IgG介导的B细胞记忆反应.
- 观察到的独特的B细胞形状表明BNT162b2和CoronaVac助推剂的差异性免疫调节作用,需要进一步调查它们的长期影响.
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