抗原持久性和TLR刺激有助于诱导持久的HIV-1特异性中和抗体反应
Kenta Matsuda1, Mitra Harrison1, Eleanor Wettstein1
1HIV-Specific Immunity Section of the Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.
开发一种有效的艾滋病毒疫苗是具有挑战性的,因为病毒的恩维糖蛋白不稳定性. 复制自然病毒感染的特征,特别是剂量和升级剂量,是改善HIV Env免疫性和诱导持久中和抗体的关键.
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:
- 由于结构不稳定性和甘氨酸屏蔽,HIV-1 Env糖蛋白 (Env) 免疫性受到阻碍,这对疫苗开发构成了重大挑战.
- 虽然稳定Env修剪剂可以诱导中和抗体,但反应往往是短暂的.
研究的目的:
- 通过病毒样粒子 (VLP) 平台和复制病毒载体,研究增强HIV-1 Env免疫性策略.
- 探索抗原呈现,形状稳定性,辅助剂,剂量和抗原持久性对抗体反应的影响.
主要方法:
- 利用纽卡斯尔病病毒样粒子 (NDV-VLP) 平台,以呈现稳定的HIV-1 Env高价值.
- 将携带Env的VLP与携带流感血素或SARS-CoV-2的VLP进行比较.
- 采用了一种复制性腺病毒4型载体,表达Env.
- 多种抗原剂量,升级剂量,辅助剂和抗原持久性.
主要成果:
- 与流感或SARS-CoV-2 VLPs不同,携带Env的VLP没有诱导中和抗体.
- 一个表达Env的复制性腺病毒载体迅速诱导了自身的中和抗体.
- 只有在结合复制性病毒感染的多个特征时,才能获得持久的中和抗体,而剂量和升级剂量具有最显著的影响.
结论:
- 通过模仿自然病毒感染的方面,可以显著提高HIV-1 Env的免疫性.
- 优化抗原剂量和采用升级剂量策略对于诱导持久的中和抗体对HIV-1 Env.的反应至关重要.
更多相关视频
09:26In Vitro Assay to Evaluate the Impact of Immunoregulatory Pathways on HIV-specific CD4 T Cell Effector Function
Published on: October 15, 2013
06:25Analysis of Simian Immunodeficiency Virus-specific CD8+ T-cells in Rhesus Macaques by Peptide-MHC-I Tetramer Staining
Published on: December 23, 2016
相关概念视频
Immunological Memory
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...
Immune Response Against Viral Pathogens
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...
B Cell Activation and Differentiation
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
Cells of the Adaptive Immune Response
T Cell Activation and Clonal Selection
Naive T cells that have not yet encountered an antigen express two primary CD...
Vaccinations
