通过对稳定的Env Trimers进行序列免疫,通过模仿自然感染来增强中和反应,基于从选择时间点的共识序列
Mingming Wan1, Xiao Yang1, Jie Sun1
1National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun 130012, China.
International journal of molecular sciences
|August 26, 2023
概括
由于病毒遗传多样性,开发有效的HIV-1疫苗是很困难的. 模仿自然感染,对几内亚猪进行了连续的Envtrimer免疫接种,诱导了针对HIV的广泛中和抗体 (bnAbs).
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 疫苗开发 疫苗开发
背景情况:
- 开发一种有效的人类免疫缺陷病毒1型 (HIV-1) 疫苗是具有挑战性的,因为病毒的高遗传变异性.
- 诱导广泛中和抗体 (bnAbs) 对于有效的HIV-1疫苗至关重要.
- 研究表明,模仿自然的HIV-1感染可能会引起bnAbs.
研究的目的:
- 调查是否使用共识HIV-1 Env三分剂的顺序免疫,模仿自然感染,可以诱导广泛中和抗体反应.
- 为了比较共识Env调整剂与标准BG505Env调整剂的免疫性.
主要方法:
- 在广泛中和之前在五个关键时间点从CH505对象生成共识Env序列.
- 从这些共识序列中设计出稳定的Env修剪器.
- 接种疫苗的试验小猪采用了使用传递/创始人Env缩剂的prime-boost策略,其次是顺序共识Env缩剂或BG505Env缩剂.
主要成果:
- 与BG505Envtrimer相比,使用共识Envtrimers的顺序免疫诱导了更广泛,更强大的中和活动.
- 共识的Env trimer策略有利于诱导针对gp120/gp41接口的抗体.
- BG505 Env trimer主要诱导针对V2区域的抗体.
结论:
- 用共识Env三分剂进行序列免疫,旨在模仿自然的HIV-1感染,是诱导广泛中和抗体的有希望的策略.
- 使用共识序列,稳定三元和顺序增强的独特方法提高了HIV-1疫苗的免疫性.
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