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375W突变对HIV-1热流和疫苗开发的影响

Odette Verdejo-Torres¹, Tania Vargas-Pavia¹, Syeda Fatima¹

¹Program in Molecular Medicine, University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA.

Journal of virology

|January 3, 2024

概括

在HIV-1包膜剪切器中,一种特定的氨基酸变化 (375W) 增强了跨多种病毒菌株的CD4结合和巨细胞感染,而不会通过广泛中和抗体 (bnAbs) 阻碍中和. 这一发现支持开发有效的针对保存的病毒特征的艾滋病毒疫苗.

科学领域:

病毒学病毒学
免疫学免疫学免疫学
疫苗开发疫苗开发

背景情况:

了解HIV-1包膜 (Env) 三分体结构对于设计引发广泛中和抗体 (bnAbs) 的疫苗至关重要.
特定的氨基酸替代可以改变Env三元体的构造,从而有可能改善疫苗的标.

研究的目的:

为了研究在位置375 (375W) 的托芬替代对HIV-1 Env缩剂功能和中和灵敏度的影响.
评估375W作为广泛中和抗体诱导疫苗的目标的潜力.

主要方法:

和突变发生被用来识别375W的替代.
375W突变被引入了27种主要HIV-1 Env变异的多样化小组.
可溶性CD4结合,单克隆抗体中和和巨细胞感染的测试在野生类型和突变Envs.进行.

主要成果:

在所有测试的Envs中,375W替代始终增加了对可溶性CD4的敏感性.
375W在许多变体中增强了巨细胞感染,包括X4变体,并且没有阻碍强效bnAbs.的中和.
巨热带变体在375W时显示了降低的热带性,这表明其他结构因素参与其中;中介和热带变体在中枢神经系统之外被发现.

结论:

375W替代是HIV-1疫苗开发的有希望的候选者,因为它能够增加CD4结合,并在各种HIV-1菌群和疾病阶段影响热带性.
375W增强了Env对CD4和针对CD4结合部位 (CD4bs) 的抗体的可访问性,而不会影响bnAb的识别,这使其对多类Env疫苗有价值.
在中枢神经系统以外的中间和巨热带变体的鉴定突显了对这些菌株和潜在的中枢神经系统 (CNS) 疾病有效的疫苗的需求.

关键词:

艾滋病病毒-1 艾滋病病毒-1 在信封封面上中和化中和化中和化热带主义热带主义热带主义疫苗,疫苗的使用情况.

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