Cell:人体生产保护性HIV抗体的VIP绿道

2018-09-30 小通 生物通

只有大约一半的HIV感染者可以产生广泛的中和抗体(bnAbs),通常在病毒反复突变并插入宿主细胞基因组很久以后才得以生成,因时机过晚而失去效果。

只有大约一半的HIV感染者可以产生广泛的中和抗体(bnAbs),通常在病毒反复突变并插入宿主细胞基因组很久以后才得以生成,因时机过晚而失去效果。

在HIV感染前引出bnAbs抗体,就可以在病毒出现时及时阻断病毒,杜克人类疫苗研究所的研究团队鉴定出一种重要蛋白,可以高度激活人体bnAbs。



该蛋白名为RAB11FIP5,似乎参与了自然杀伤性细胞(natural killer cell,NK)的分布和功能(NK细胞是病毒感染期间免疫系统的最早应答者之一)。

杜克人类疫苗研究所所长、这篇《Cell》文章通讯作者Barton Haynes说:“这种类型的免疫细胞以前并不知道可以调节bnAbs,我们找到了新的NK细胞货物运载途径似乎对bnAbs生产起重要作用。”

研究人员设计实验分析了可以制造bnAbs的HIV感染者与不能生产bnAbs之间的分子差异,分析了239名感染者,发现大约50人分别处于两个极端(bnAbs数量最多和最低)。

使用RNA测序,确定这两组极端患者体内的分子差异,发现了他们的RAB11FIP5基因表达差异。“这些数据表明,NK细胞功能障碍允许bnAbs生产,意味着,Rab11是HIV抗体应答的调节因子,”Bradley说。“这是一条我们正希望改善的、接种疫苗产生更好的HIV抗体应答的新途径。”

原始出处:Todd Bradley, Dimitra Peppa, Isabela Pedroza-Pacheco, et al. RAB11FIP5 Expression and Altered Natural Killer Cell Function Are Associated with Induction of HIV Broadly Neutralizing Antibody Responses. Cell. September 27, 2018 

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    2019-01-03 维他命
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    2019-08-24 chendoc254
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    2019-05-22 Homburg
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