利用疫苗来缓解原始抗原性罪恶,以增强针对SARS-CoV-2Omicron亚型的广泛中和抗体反应
Guangxu Zhang1, Qian Wang1, Kai Ji2
1Key Laboratory of Medical Molecular Virology (Ministry of Education/National Health Commission/Chinese Academy of Medical Science), Shanghai Institute of Infectious Disease and Biosecurity, School of Basic Medical Sciences Fudan University Shanghai China.
MedComm
|July 8, 2025
概括
原始抗原性罪 (OAS) 削弱了对SARS-CoV-2 Omicron变种的免疫反应. 使用具有较大抗原距离的强剂疫苗的杆疫苗接种策略,如在WT-RBD初始化后的XBB-RBD,可以增强广泛中和抗体反应.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 疫苗学 疫苗学 疫苗学
背景情况:
- 在SARS-CoV-2祖先菌株接种疫苗或感染后,原始抗原性罪 (OAS) 或免疫印记可能会损害对新出现的Omicron变异 (例如,BA.2,XBB) 的中和抗体反应.
- 需要创新的增剂疫苗策略来缓解OAS并扩大对SARS-CoV-2变种的中和抗体 (bnAb) 反应.
研究的目的:
- 提出和评估一项旨在控制抗原距离并提高疫苗接种频率以克服OAS的杆化疫苗接种战略.
- 为了增强针对SARS-CoV-2 Omicron亚型的广泛中和抗体 (bnAb) 反应.
主要方法:
- 研究了原始 (WT-RBD) 和增强 (BA.2-RBD与XBB-RBD) 疫苗组件之间的不同抗原距离对bnAb反应的影响.
- 评估了额外的助推剂量对bnAb疗效的影响,与Omicron亚变体小组对比.
主要成果:
- 与WT-RBD进行原始化和XBB-RBD进行增强,与BA.2-RBD进行增强相比,与大多数测试的Omicron亚型相比,引起了显著更高的bnAb反应.
- 增强的反应是由于WT-RBD和XBB-RBD之间的抗原距离更大.
- 额外的XBB-RBD提升进一步增强了bnAb的反应.
结论:
- 一个利用疫苗接种策略,优化抗原距离和提升频率,可以有效地减少OAS.
- 这种方法加强了bnAb对SARS-CoV-2 Omicron亚型的反应.
- 该策略有可能对抗其他快速演变的RNA病毒.
相关概念视频
Vaccinations
45.3K
Overview
45.3K
Cross-reactivity
31.5K
Overview
31.5K
Immunological Memory
5.8K
Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
5.8K
Immune Response Against Viral Pathogens
931
The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
931
Humoral Immune Responses
76.6K
Overview
76.6K
Active versus Passive Immunity
4.2K
Immunity, along with the ability to limit pathogen growth to prevent significant body tissue damage, can be gained either by (1) actively developing an immune response within the individual after exposure to a pathogen or after getting vaccinated or (2) passively transferring immune components from an immune individual to one who is nonimmune. Both these forms of immunity can be found naturally and in medical practices.
Active Immunity
Active immunity refers to the resistance one develops...
Active Immunity
Active immunity refers to the resistance one develops...
4.2K


