Functional screening for anti-CMV biologics identifies a broadly neutralizing epitope of an essential envelope protein.

Functional screening for anti-CMV biologics identifies a broadly neutralizing epitope of an essential envelope protein.
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DOI:
10.1038/ncomms13627
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发表时间:
2016-12-14
影响因子:
16.6
通讯作者:
Tortorella, Domenico
Tortorella, Domenico
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Gardner, Thomas J.;Stein, Kathryn R.;Duty, J. Andrew;Schwarz, Toni M.;Noriega, Vanessa M.;Kraus, Thomas;Moran, Thomas M.;Tortorella, Domenico

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原型β-疱疹病毒人巨细胞病毒(CMV)在其人类宿主中建立终身持久性。CMV包膜由各种蛋白质复合物组成,这些蛋白质复合物使病毒具有广泛的嗜性。更具体地,糖蛋白复合物gH/gL/gO(gH-三聚体)是感染所有细胞类型所必需的,而gH/gL/UL 128/130/131 a(gH-五聚体)复合物赋予感染上皮细胞、内皮细胞和骨髓细胞的特异性。在这里,我们利用最先进的机器人技术和高通量中和试验来筛选和鉴定靶向gH糖蛋白的单克隆抗体(mAb),这些单克隆抗体显示出抑制病毒感染和传播的广谱特性。随后的生物化学表征揭示了mAb与gH-三聚体和gH-五聚体复合物结合,并将抗体的表位鉴定为对病毒进入至关重要的“抗原热点”。该mAb通过与高度保守的中央α螺旋富集结构域相互作用,在附着后步骤抑制CMV感染。本文所述的平台为开发有效的CMV生物制剂和疫苗设计策略提供了框架。 人巨细胞病毒(CMV)对免疫抑制患者和新生儿构成风险,可用的治疗方案有限。在此,Gardner等人使用高通量方法并鉴定了结合病毒糖蛋白gH中高度保守结构域的单克隆抗体作为CMV感染的有效抑制剂。
The prototypic β-herpesvirus human cytomegalovirus (CMV) establishes life-long persistence within its human host. The CMV envelope consists of various protein complexes that enable wide viral tropism. More specifically, the glycoprotein complex gH/gL/gO (gH-trimer) is required for infection of all cell types, while the gH/gL/UL128/130/131a (gH-pentamer) complex imparts specificity in infecting epithelial, endothelial and myeloid cells. Here we utilize state-of-the-art robotics and a high-throughput neutralization assay to screen and identify monoclonal antibodies (mAbs) targeting the gH glycoproteins that display broad-spectrum properties to inhibit virus infection and dissemination. Subsequent biochemical characterization reveals that the mAbs bind to gH-trimer and gH-pentamer complexes and identify the antibodies' epitope as an ‘antigenic hot spot' critical for virus entry. The mAbs inhibit CMV infection at a post-attachment step by interacting with a highly conserved central alpha helix-rich domain. The platform described here provides the framework for development of effective CMV biologics and vaccine design strategies. Human cytomegalovirus (CMV) poses a risk for immunosuppressed patients and newborns, with limited treatment options available. Here, Gardner et al. use a high-throughput approach and identify monoclonal antibodies that bind a highly conserved domain in the viral glycoprotein gH as potent inhibitors of CMV infection.
DOI: 10.1016/s0197-2456(02)00268-4
发表时间: 2003-02-01
期刊: CONTROLLED CLINICAL TRIALS
影响因子: --
作者:
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DOI: 10.1016/j.antiviral.2014.10.011
发表时间: 2015-01
期刊: ANTIVIRAL RESEARCH
影响因子: 7.6
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通讯作者: Tortorella, Domenico
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发表时间: 1998-10-01
影响因子: 5.4
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DOI: 10.1128/cvi.00644-12
发表时间: 2013-04-01
影响因子: --
作者:
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通讯作者: Tortorella, Domenico