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Updated: Jun 11, 2025

Conformational Evaluation of HIV-1 Trimeric Envelope Glycoproteins Using a Cell-based ELISA Assay

Conformational Evaluation of HIV-1 Trimeric Envelope Glycoproteins Using a Cell-based ELISA Assay

Published on: September 14, 2014

CD4的降低调节先于Env的表达,并保护HIV-1感染细胞免受非中和抗体介导的ADCC的影响

Jonathan Richard^1,2, Gérémy Sannier^1,2, Li Zhu³

¹Centre de Recherche du CHUM, Montréal, Québec, Canada.

|October 7, 2024

概括

生产性感染的HIV-1细胞在表达Env之前降低CD4的调节,使它们对非中和抗体 (nnAbs) 和ADCC.抗性. 这种耐药性挑战了针对HIV-1治疗的免疫疗法策略.

科学领域:

免疫学免疫学免疫学
病毒学病毒学
细胞生物学细胞生物学

背景情况:

抗体依赖细胞细胞毒性 (ADCC) 对于清除病毒感染细胞至关重要.
艾滋病毒-1包膜糖蛋白 (Env) 形状影响ADCC的敏感性.
广泛中和抗体 (bnAbs) 针对封闭的Env,而非中和抗体 (nnAbs) 针对开放的Env.

研究的目的:

研究HIV-1 Env,CD4和感染CD4+T细胞中的抗体之间的相互作用.
了解CD4调制对Env表达和ADCC敏感性的影响.

主要方法:

多参数流细胞计. 多参数流细胞计.
RNA流光in situ杂交 (FISH) 用于同时测量HIV-1 mRNA表达和抗体结合.
在接受nnAb A32.2治疗的HIV-1感染人性化小鼠中进行的研究.

主要成果:

mRNA表达主要观察到在生产性感染的细胞中,这些细胞已经降低了CD4的调制.
生产性感染的细胞表达了封闭的EnV,使它们对nnAbs.具有抗性.
nnAb结合发生在缺乏envmRNA的细胞上,可能是通过脱落的gp120或附着的病毒体.
在人性化小鼠中,用nnAb A32治疗并没有减少病毒复制或储大小.

结论:

艾滋病毒-1 CD4 降低调节在Env表达之前,在生产性感染的细胞上赋予了对nnAbs介导的ADCC的抵抗力.
生产性感染的细胞对bnAbs.保持敏感.
基于nnAb的免疫疗法治疗HIV-1的疗效是值得怀疑的,因为这种抵抗机制.

关键词:

A32 A32 A32 A32 A32 A32 A32 A32 A32 A32 A32 A32 A32 ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC is also known as ADCC ADCC ADCC is also known as ADCC 这是一个敌人.艾滋病病毒-1 艾滋病病毒-1 在RNA流鱼中,RNA流鱼 bNAbs 的意思就是bNAbs.这是一只小鼠.nnAbsAbs 在线观看

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