第三剂COVID-19疫苗提高了高艾滋病毒病毒载量卢旺达人的抗体功能
Cynthia L Swan1, Valentine Dushimiyimana2, Pacifique Ndishimye3,4
1Vaccine and Infectious Disease Organization VIDO, University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada.
iScience
|October 9, 2023
概括
在卢旺达,高病毒载荷的艾滋病毒感染者 (PLWH) 对两剂COVID-19疫苗的抗体反应较弱. 第三剂量显著提高了他们对抗SARS-CoV-2变种的中和抗体水平.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 公共卫生 公共卫生
背景情况:
- 严重急性呼吸系统综合征冠状病毒2 (SARS-CoV-2) 感染对免疫功能低下的个体,包括艾滋病毒感染者 (PLWH) 的风险增加.
- 在低收入国家的PLWH人群中,对COVID-19疫苗反应的研究有限.
- 了解不同PLWH群体的疫苗接种后免疫力对于全球卫生战略至关重要.
研究的目的:
- 评估卢旺达在接种COVID-19疫苗后感染艾滋病毒的人群中的SARS-CoV-2抗体反应.
- 为了比较PLWH与对照组中的SARS-CoV-2变异的抗体结合和中和能力.
- 评估第三剂疫苗对PLWH抗体标位的影响.
主要方法:
- 在卢旺达接种了第二或第三剂COVID-19疫苗后,从PLWH收集了周围血液样本.
- 分析包括对病毒结合抗体的量化.
- 对主要的SARS-CoV-2变种进行了抗体中和能力的评估.
主要成果:
- 接受两剂疫苗的高HIV病毒载荷的PLWH显示病毒结合抗体水平降低.
- 与对照组相比,这些抗体的病毒中和和交叉反应能力较低.
- 第三次COVID-19疫苗接种剂量导致PLWH中中和抗体标位增加.
结论:
- 两个COVID-19疫苗剂量可能不足以在PLWH中实现最佳SARS-CoV-2中和,而PLWH病毒载量较高.
- 建议进行第三剂疫苗,以加强对SARS-CoV-2及其新兴变种的保护.
- 需要进一步的研究,以优化全球免疫功能低下个体的疫苗接种策略.
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