在美国成年人中,抗体对细胞培养,重组或基于蛋的流感疫苗的连续接种疫苗的抗体反应
Thomas G Boyce1, Min Z Levine2, David L McClure1
1Center for Clinical Epidemiology & Population Health, Marshfield Clinic Research Institute, Marshfield, WI, USA.
Human vaccines & immunotherapeutics
|July 10, 2024
概括
再组合流感疫苗 (RIV) 与非活化流感疫苗 (IIV) 和基于细胞培养的非活化疫苗 (ccIIV) 相比,对A/H3N2病毒的免疫反应优越. 这一发现突出了RIV的发现.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 病毒学 病毒学
背景情况:
- 不活化流感疫苗 (IIV) 的免疫性受制造工艺的影响.
- 基于蛋的制造对于IIV是常见的,但基于细胞培养的非活化疫苗 (ccIIV) 和复合疫苗 (RIV) 提供了替代方案.
- 了解这些疫苗类型的比较免疫性对于公共卫生至关重要.
研究的目的:
- 在18-64岁的成年人中,以RIV,ccIIV和IIV进行连续接种疫苗的免疫性进行比较.
- 评估对不同流感病毒菌株的抗体反应,包括A/H1N1,A/H3N2和B型流感.
- 评估用同一种疫苗产品重新接种疫苗的"反弹"效应.
主要方法:
- 一个随机的,开放的标签试验,在两个流感季节 (2018-19和2019-20) 进行.
- 参与者被随机分配到接受RIV,ccIIV或IIV,并在第二年重新接种相同产品.
- 配对的血清样本使用凝血抑制试验进行分析,以确定几何平均标位 (GMT),平均折叠升高和血清转化率.
主要成果:
- 在第一季,RIV和ccIIV与IIV相比,对A/H1N1的免疫效果并没有比IIV更强.
- 与两季的IIV和ccIIV相比,RIV对细胞培养的A/H3N2病毒的疫苗接种后GMT显示较高.
- 与ccIIV或IIV相比,用RIV重新接种导致对抗原漂移的A/H3N2菌株的反弹显著增加,而不是ccIIV或IIV.
结论:
- 再组合流感疫苗 (RIV) 与其他授权流感疫苗产品相比,引起对A/H3N2病毒的优越免疫反应.
- 这些发现支持RIV作为预防流感的潜在更有效的选择,特别是针对漂移菌株.
- 顺序接种疫苗的策略可能会影响疫苗的有效性,需要进一步的研究.
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