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Volumn 329, Issue 5993, 2010, Pages 856-861

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

Author keywords

[No Author keywords available]

Indexed keywords

CD4 ANTIGEN; GLYCOPROTEIN; HUMAN MONOCLONAL ANTIBODY; IMMUNOGLOBULIN G;

EID: 77954920017     PISSN: 00368075     EISSN: 10959203     Source Type: Journal    
DOI: 10.1126/science.1187659     Document Type: Article
Times cited : (1476)

References (39)
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    • + T cells in peripheral blood. Because this interaction would confound the selection of B cells expressing CD4bs IgG, we additionally sought to design proteins containing the majority of the CD4bs epitope surface that maintained b12 reactivity but that no longer bound to CD4. Specifically, computer-assisted modeling was used to alter the β20/21 region of gp120 that is required for CD4 binding but is not part of the b12-contact surface (fig. S1).
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    • Additional studies using primary PBMC-derived viral isolates and PBMC as target cells confirmed that VRC01, VRC02, and VRC03 were able to neutralize replication-competent uncloned HIV-1 isolates grown in primary T cells (table S3). We also tested the impact of VRC01 on the functional viral spike because VRC01 and VRC02, like CD4, showed the ability to alter the conformation of gp120 and enhanced binding of CD4-induced antibodies like 17b. Unlike CD4, however, VRC01 did not promote the entry of primary HIV-1 isolates into CD4-negative cells, and it did not augment the neutralization potency of mAb 17b (fig. S7).
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    • Our successful isolation of CD4bs mAbs with extensive neutralization breadth was likely due to several factors. Recent advances in high-throughput neutralization assays facilitated the identification of HIV-1 antisera containing broad NAbs (4-7, 29-32). Advances in serum epitope mapping technologies led us to understand that conserved regions of HIV-1 Env may be targeted by such NAbs (4, 7, 9, 30, 33-37). The atomic-level structure of gp120 (10, 38) and advances in computational modeling allowed development of the RSC probe pair that was used to identify and sort CD4bs antibody-secreting B cells. Because of the large repertoire of circulating antibodies against gp120, most of them nonneutralizing, the epitope selectivity conferred by the RSC3 protein, together with use of the knock-out mutant, was likely important for the identification of the relatively rare memory B cells secreting NAbs to the CD4bs. Recently, the gp140 form of Env was used to identify HIV-1-specific B cells and study the repertoire of the antibody responses to the Env glycoprotein (16). Numerous unique antibodies were derived from each of six HIV-1-infected donors, but no single mAb demonstrated broad and potent neutralization. The ability to identify epitope-specific B cells, and isolate the specific IgG clones, has broad potential application. A similar epitope-specific approach could be used to isolate mAbs to sites of known structure from infectious disease pathogens, including tuberculosis and malaria, and can be applied to the identification of targets of autoimmunity or cancer therapy.
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    • note
    • This research was supported by the Intramural Research Program of the Vaccine Research Center, the Division of Clinical Research and the Laboratory of Immunoregulation of National Institute of Allergy and Infectious Diseases, NIH. M.S.S. was supported in part by the Bill and Melinda Gates Foundation's Collaboration for AIDS Vaccine Discovery, Comprehensive Antibody-Vaccine Immune Monitoring Consortium, grant number 38619. W.R.S. was supported by the Bill and Melinda Gates Foundation Collaboration for AIDS Vaccine Discovery through a grant to Seattle Biomedical Research Institute and by the International AIDS Vaccine Initiative. Nucleotide sequences of VRC01, VRC02, and VRC03 variable regions are available under GenBank accession numbers GU980702 to GU980707. Patent applications have been filed by the NIH on mAbs VRC01, VRC02, and VRC03 (listed investigators are X.W., Z.Y.Y., Y.L., C.M.H, W.R.S., T.Z., M.C., P.D.K., M.R., R.T.W., G.J.N., and J.R.M.) and on the RSC3 probe (listed investigators are Z.Y.Y., W.R.S., T.Z., P.D.K. and G.J.N.). We thank M. Nussenzweig and J. Scheid (Laboratory of Molecular Immunology, Howard Hughes Medical Institute, Rockefeller University, New York, NY) for sharing expertise and reagents for IgG cloning and expression; B. Haynes (Duke University Medical Center, Durham, NC) for sharing reagents and PCR methods; S. Perfetto, R. Nguyen, and D. Ambrozak for assistance with cell sorting; E. Lybarger for neutralization assays; J. Stuckey and B. Hartman for assistance with figures; A. Tislerics for manuscript preparation; D. Follman for statistical advice; C. Carrico for discussions on resurfacing; Y.-E. A. Ban and L. Kong for glycan modeling; P. Chattopadhyay and J. Yu for fluorescent antibody production and qualification; C. Williamson (University of Capetown, Capetown, South Africa), M. Thomson (Instituto de Salud Carlos III, Madrid, Spain), J. Overbaugh (Fred Hutchinson Cancer Research Center, Seattle, WA), and S. Tovanabutra and E. Sanders-Buell (Henry M. Jackson Foundation and the U.S. Military HIV Research Program, Rockville, MD) for contributing HIV-1 Env plasmids for pseudovirus production.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.