Broad and potent neutralizing antibodies from an African donor reveal a new HIV-1 vaccine target.

Broad and potent neutralizing antibodies from an African donor reveal a new HIV-1 vaccine target.
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DOI:
10.1126/science.1178746
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发表时间:
2009-10-09
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Burton DR
Burton DR
中科院分区:
其他
文献类型:
--
作者:
Walker LM;Phogat SK;Chan-Hui PY;Wagner D;Phung P;Goss JL;Wrin T;Simek MD;Fling S;Mitcham JL;Lehrman JK;Priddy FH;Olsen OA;Frey SM;Hammond PW;Protocol G Principal Investigators;Kaminsky S;Zamb T;Moyle M;Koff WC;Poignard P;Burton DR

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广泛中和抗体(bNAb),随着时间的推移,在一些HIV-1感染者中发展,定义了HIV疫苗设计的关键表位。使用系统的方法,我们已经检查了约1,800名HIV-1感染者(主要感染非进化枝B病毒)血清中的中和宽度,并选择了用于单克隆抗体(mAb)生成的供体。然后,我们使用来自进化枝A感染的非洲供体的约30,000个活化的记忆B细胞的含抗体培养物上清液的高通量中和筛选,以分离两种靶向广泛中和表位的有效mAb。先前未描述的表位优先在三聚体包膜蛋白上表达,并跨越gp 120亚基可变环的保守区域。结果提供了一个框架,用于设计新的疫苗候选人的启发bNAb的反应。
Broadly neutralizing antibodies (bNAbs), which develop over time in some HIV-1 infected individuals, define critical epitopes for HIV vaccine design. Using a systematic approach, we have examined neutralization breadth in the sera of about 1,800 HIV-1 infected individuals, primarily infected with non-clade B viruses, and selected donors for monoclonal antibody (mAb) generation. We then used a high-throughput neutralization screen of antibody-containing culture supernatants from approximately 30,000 activated memory B cells from a clade A-infected African donor to isolate two potent mAbs that target a broadly neutralizing epitope. The previously undescribed epitope is preferentially expressed on trimeric Envelope protein and spans conserved regions of variable loops of the gp120 subunit. The results provide a framework for the design of new vaccine candidates for the elicitation of bNAb responses.
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