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在撒哈拉以南地区的人口中,高频率的HIV前体-目标特异性B细胞

Flavio Matassoli¹, Alberto Cagigi¹, Chen-Hsiang Shen¹

¹Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.

|November 29, 2023

概括

与美国人口相比,撒哈拉以南非洲人群显示了更高或相当的天真B细胞识别工程HIV外部域 (eOD-GT8) 的频率. 这表明eOD-GT8疫苗可能有效地扩大非洲的保护性B细胞.

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:

工程外域生殖系向版本8 (eOD-GT8) 针对VRC01类抗体的B细胞前体.
之前关于eOD-GT8被B细胞识别的研究仅限于美国人群.
艾滋病毒不成比例地影响撒哈拉以南非洲人口,需要区域免疫反应的特征.

研究的目的:

描述撒哈拉以南非洲群体中识别eOD-GT8的天真B细胞的频率和遗传特征.
将这些发现与来自美国人口的结果进行比较.
评估撒哈拉以南非洲地区eOD-GT8疫苗接种战略的潜力.

主要方法:

在撒哈拉以南非洲群体中分析原始B细胞频率和基因表达.
在撒哈拉以南非洲和美国人口之间比较eOD-GT8反应性B细胞频率.
鉴定与VRC01类抗体前体相关的遗传标记物.

主要成果:

与美国人口相比,撒哈拉以南非洲人群表现出更高或相当于参与eOD-GT8的天真B细胞的频率.
在来自撒哈拉以南非洲的eOD-GT8阳性细胞中观察到VRC01类抗体和其他CD4bs导向抗体特征的基因特征的更高流行率.
这些发现表明,在这些人群中,有一个强大的前体池,可以广泛中和这些人群中的抗体.

结论:

在撒哈拉以南非洲使用eOD-GT8接种疫苗有望扩大和建立CD4bs导向的B细胞记忆池.
撒哈拉以南非洲的遗传景观支持VRC01类抗体的发展.
这项研究支持基于eOD-GT8的HIV疫苗策略在高负担地区的潜在有效性.

关键词:

B细胞是B细胞的组成部分.CP: 免疫学免疫学 CP: 微生物学微生物学艾滋病病毒艾滋病病毒艾滋病病毒疫苗疫苗疫苗疫苗

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