Rational HIV immunogen design to target specific germline B cell receptors.

Rational HIV immunogen design to target specific germline B cell receptors.
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DOI:
10.1126/science.1234150
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发表时间:
2013-05-10
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Schief WR
Schief WR
中科院分区:
其他
文献类型:
--
作者:
Jardine J;Julien JP;Menis S;Ota T;Kalyuzhniy O;McGuire A;Sok D;Huang PS;MacPherson S;Jones M;Nieusma T;Mathison J;Baker D;Ward AB;Burton DR;Stamatatos L;Nemazee D;Wilson IA;Schief WR

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开发疫苗以诱导针对HIV-1的广泛中和抗体(bNAb)是全球卫生优先事项。针对HIV gp 120的CD 4结合位点的有效VRC 01类bNAb已从HIV-1感染个体中分离;然而,此类bNAb尚未通过疫苗接种诱导。野生型gp 120蛋白对VRC 01类bNAb的预测种系前体缺乏可检测的亲和力,使其成为引发VRC 01类应答的不良免疫原。我们采用计算指导的体外筛选来设计一种生殖系靶向gp 120外结构域免疫原,该免疫原结合多种VRC 01类bNAb及其生殖系前体。当在纳米颗粒上多聚化时,该免疫原(eOD-GT 6)激活生殖系和成熟的VRC 01类B细胞。因此,eOD-GT 6纳米颗粒有望成为疫苗的主要候选物。原则上,类似的种系靶向策略可以应用于其他表位和病原体。
Vaccine development to induce broadly neutralizing antibodies (bNAbs) against HIV-1 is a global health priority. Potent VRC01-class bNAbs against the CD4 binding site of HIV gp120 have been isolated from HIV-1-infected individuals; however, such bNAbs have not been induced by vaccination. Wild-type gp120 proteins lack detectable affinity for predicted germline precursors of VRC01-class bNAbs, making them poor immunogens to prime a VRC01-class response. We employed computation-guided, in vitro screening to engineer a germline-targeting gp120 outer domain immunogen that binds to multiple VRC01-class bNAbs and their germline precursors. When multimerized on nanoparticles, this immunogen (eOD-GT6) activates both germline and mature VRC01-class B cells. Thus, eOD-GT6 nanoparticles have promise as a vaccine prime candidate. In principle, similar germline-targeting strategies can be applied to other epitopes and pathogens.
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