Rational design of envelope identifies broadly neutralizing human monoclonal antibodies to HIV-1.

Rational design of envelope identifies broadly neutralizing human monoclonal antibodies to HIV-1.
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DOI:
10.1126/science.1187659
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发表时间:
2010-08-13
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Mascola JR
Mascola JR
中科院分区:
其他
文献类型:
--
作者:
Wu X;Yang ZY;Li Y;Hogerkorp CM;Schief WR;Seaman MS;Zhou T;Schmidt SD;Wu L;Xu L;Longo NS;McKee K;O'Dell S;Louder MK;Wycuff DL;Feng Y;Nason M;Doria-Rose N;Connors M;Kwong PD;Roederer M;Wyatt RT;Nabel GJ;Mascola JR

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在许多HIV-1感染者的血清中发现了交叉反应中和抗体(NAB),但其中和的病毒学基础尚不清楚。我们利用对HIV-1包膜结构的了解,开发出了针对初始CD4受体结合的结构保守部位的抗原性表面糖蛋白。这些探针被用来识别与CD4结合位点(CD4bs)具有NAb的血清,并从这种HIV-1感染的捐赠者中分离单个B细胞。通过表达单个细胞的免疫球蛋白基因,我们鉴定了三种单抗,其中包括一对体细胞变异体,它中和了90%以上的HIV-1循环分离株。针对糖蛋白120的功能保守的CD4bs的单个抗体可以实现异常广泛的HIV-1中和,这是未来HIV-1疫苗设计的重要洞察力。
Cross-reactive neutralizing antibodies (NAbs) are found in the sera of many HIV-1–infected individuals, but the virologic basis of their neutralization remains poorly understood. We used knowledge of HIV-1 envelope structure to develop antigenically resurfaced glycoproteins specific for the structurally conserved site of initial CD4 receptor binding. These probes were used to identify sera with NAbs to the CD4-binding site (CD4bs) and to isolate individual B cells from such an HIV-1–infected donor. By expressing immunoglobulin genes from individual cells, we identified three monoclonal antibodies, including a pair of somatic variants that neutralized over 90% of circulating HIV-1 isolates. Exceptionally broad HIV-1 neutralization can be achieved with individual antibodies targeted to the functionally conserved CD4bs of glycoprotein 120, an important insight for future HIV-1 vaccine design.
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