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

Science (New York, N.Y.) | 2009

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 1800 HIV-1-infected individuals, primarily infected with non-clade B viruses, and have selected donors for monoclonal antibody (mAb) generation. We then used a high-throughput neutralization screen of antibody-containing culture supernatants from about 30,000 activated memory B cells from a clade A-infected African donor to isolate two potent mAbs that target a broadly neutralizing epitope. This 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.

Pubmed ID: 19729618 RIS Download

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Associated grants

  • Agency: Medical Research Council, United Kingdom
    Id: MC_U950097145
  • Agency: NIAID NIH HHS, United States
    Id: R01 AI033292-18
  • Agency: NIAID NIH HHS, United States
    Id: R37 AI033292
  • Agency: NIAID NIH HHS, United States
    Id: R01 AI033292
  • Agency: NIAID NIH HHS, United States
    Id: AI33292

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PG9 antibody (antibody)

RRID:AB_2491030

This monoclonal targets HIV-1 Envelope V2-V3 loops, quaternary structure

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PG16 antibody (antibody)

RRID:AB_2491031

This monoclonal targets HIV-1 Envelope V2-V3 loops, quaternary structure

View all literature mentions