Broad and potent HIV-1 neutralization by a human antibody that binds the gp41-gp120 interface.

Broad and potent HIV-1 neutralization by a human antibody that binds the gp41-gp120 interface.
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DOI:
10.1038/nature13601
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发表时间:
2014-11-06
期刊:
影响因子:
64.8
通讯作者:
Connors, Mark
Connors, Mark
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Huang, Jinghe;Kang, Byong H.;Pancera, Marie;Lee, Jeong Hyun;Tong, Tommy;Feng, Yu;Imamichi, Hiromi;Georgiev, Ivelin S.;Chuang, Gwo-Yu;Druz, Aliaksandr;Doria-Rose, Nicole A.;Laub, Leo;Sliepen, Kwinten;van Gils, Marit J.;de la Pena, Alba Torrents;Derking, Ronald;Klasse, Per-Johan;Migueles, Stephen A.;Bailer, Robert T.;Alam, Munir;Pugach, Pavel;Haynes, Barton F.;Wyatt, Richard T.;Sanders, Rogier W.;Binley, James M.;Ward, Andrew B.;Mascola, John R.;Kwong, Peter D.;Connors, Mark

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人单克隆抗体 (mAb) 的分离提供了有关 HIV-1 广泛中和作用的特异性的重要见解(已综述)。在这里,我们报道了一种广泛且极其有效的 HIV 特异性单克隆抗体,称为 35O22,它结合新的 HIV-1 包膜糖蛋白 (Env) 表位。 35O22 中和了 181 种假病毒中的 62%,IC50<50 μg/ml。中和病毒的中值 IC50 为 0.033 μg/ml,是迄今为止描述的最有效的病毒之一。 35O22不结合所测试的Env的单体形式,但确实结合三聚体BG505 SOSIP.664。对与三聚体形成的复合物中的 Fab 进行诱变和负染色电子显微镜重建,结果显示它结合了一个保守表位,该表位延伸至 gp120 和 gp41。 35O22 的特异性代表了 HIV 包膜的一个新的脆弱位点,血清分析表明该位点通常是由自然感染引起的。因此,与这个新的脆弱位点的结合可能是对当前基于单克隆抗体的免疫治疗、预防和疫苗设计方法的重要补充。
The isolation of human monoclonal antibodies (mAbs) is providing important insights regarding the specificities that underlie broad neutralization of HIV-1 (reviewed in). Here we report a broad and extremely potent HIV-specific mAb, termed 35O22, which binds novel HIV-1 envelope glycoprotein (Env) epitope. 35O22 neutralized 62% of 181 pseudoviruses with an IC50<50 μg/ml. The median IC50 of neutralized viruses was 0.033 μg/ml, among the most potent thus far described. 35O22 did not bind monomeric forms of Env tested, but did bind the trimeric BG505 SOSIP.664. Mutagenesis and a reconstruction by negative-stain electron microscopy of the Fab in complex with trimer revealed it to bind a conserved epitope, which stretched across gp120 and gp41. The specificity of 35O22 represents a novel site of vulnerability on HIV Env, which serum analysis indicates to be commonly elicited by natural infection. Binding to this new site of vulnerability may thus be an important complement to current mAb-based approaches to immunotherapies, prophylaxis, and vaccine design.
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