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免疫接种扩大了小鼠和的HIV-1 V3糖因特异性B细胞

Amelia Escolano¹, Harry B Gristick², Morgan E Abernathy²

¹Laboratory of Molecular Immunology, The Rockefeller University, New York, NY, USA.

|May 31, 2019

概括

一种新的免疫原RC1激活B细胞以产生针对HIV-1 V3糖贴片的抗体. 这种方法可能使得针对HIV-1的抗体得到广泛的中和.

科学领域:

免疫学
病毒学
疫苗开发

背景情况:

在动物模型中,广泛中和的单克隆抗体显示出HIV-1预防的前景.
目前的疫苗接种策略难以引起针对HIV-1的有效抗体反应.
艾滋病毒-1包膜蛋白上的V3甘氨酸贴片是广泛中和抗体的关键目标.

研究的目的:

开发一种可激活B细胞的免疫原,产生广泛中和抗体的前体.
针对HIV-1包膜蛋白中的V3糖贴片.

主要方法:

开发RC1免疫基因,该免疫基因可隐藏非保存区域,并使用类似病毒的粒子进行多重化.
用RC1对老鼠,和 rhesus进行免疫.
血清反应分析,抗体克隆和冷电子显微镜.

主要成果:

在免疫动物中,RC1免疫成功引发了针对V3甘氨酸贴片的血清反应.
抗体克隆和结构分析证实B细胞克隆的扩张产生抗V3甘氨酸补丁抗体.
这些抗体类似于人类广泛中和抗体的前体.

结论:

RC1 是一个有前途的启动免疫因子,用于顺序接种疫苗.
这种方法可以克服诱导广泛中和抗体对HIV-1的限制.
在HIV-1疫苗开发过程中,RC1促进了多克隆细胞B细胞的激活.

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