儿童和成年人之间呼吸道同胞性病毒特定的Fc介导抗体效应因子功能的差异
Anke J Lakerveld1,2, Anne T Gelderloos1, Rutger M Schepp1
1Center for Immunology of Infectious Diseases and Vaccines, Center for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands.
Clinical and experimental immunology
|August 22, 2023
概括
呼吸道同胞性病毒 (RSV) 抗体功能,包括抗体依赖性自然杀手细胞激活 (ADNKA),随着时间的推移而发展. 虽然抗体水平较早成熟,但ADNKA在儿童中需要更长的时间才能完全发育,从而影响RSV免疫力.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 儿科 儿科 儿科
背景情况:
- 呼吸道同胞病毒 (RSV) 是导致婴儿和老年人呼吸道疾病的首要原因.
- 对于RSV,没有确立的保护相关性.
- 在RSV感染和疫苗接种中,fc介导的抗体功能至关重要,但人们对其了解甚少.
研究的目的:
- 综合评估RSV特异性血清抗体的数量和质量方面.
- 研究不同年龄组的功能性抗体反应的发展,异质性和持久性.
- 通过澄清免疫学背景,为未来的RSV疫苗策略提供信息.
主要方法:
- 对RSV特异性IgG/IgA水平,IgG子类和Fc介导功能 (补充沉积,细胞,NK细胞激活 - ADNKA) 在儿童 (11,24,46个月),成年人和老年人中的横截面研究.
- 在RSV感染后 (2-36个月) 的 (老年) 成年人的长度随访.
- 统计分析比较年龄组之间的功能反应和随着时间的推移.
主要成果:
- 与成年人相比,来自24个月大的儿童的血清显示出明显较低的抗体依赖性自然杀手细胞激活 (ADNKA),无论抗体水平如何.
- 在成年人感染RSV后,抗体水平和功能在2-3个月后增加,ADNKA除外.
- 抗体水平和功能在感染后9个月内显著下降,然后在长达三年内稳定下来.
结论:
- 在幼儿时期 (24个月) 时,RSV特异性抗体水平成熟到成人水平.
- 抗体依赖性自然杀手细胞激活 (ADNKA) 需要更长的发育期,比抗体数量晚达到成人水平.
- 了解这些年龄相关的功能性抗体差异对于开发有效的RSV疫苗至关重要.
相关概念视频
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