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Friedman J, Alam SM, Shen X, Xia SM, Stewart S, Anasti K, Pollara J, Fouda GG, Yang G, Kelsoe G, Ferrari G, Tomaras GD, Haynes BF, Liao HX, Moody MA, Permar SR. Isolation of HIV-1-neutralizing mucosal monoclonal antibodies from human colostrum. PLoS One 2012; 7:e37648. [PMID: 22624058 PMCID: PMC3356285 DOI: 10.1371/journal.pone.0037648] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Accepted: 04/23/2012] [Indexed: 11/19/2022] Open
Abstract
Background Generation of potent anti-HIV antibody responses in mucosal compartments is a potential requirement of a transmission-blocking HIV vaccine. HIV-specific, functional antibody responses are present in breast milk, and these mucosal antibody responses may play a role in protection of the majority of HIV-exposed, breastfeeding infants. Therefore, characterization of HIV-specific antibodies produced by B cells in milk could guide the development of vaccines that elicit protective mucosal antibody responses. Methods We isolated B cells from colostrum of an HIV-infected lactating woman with a detectable neutralization response in milk and recombinantly produced and characterized the resulting HIV-1 Envelope (Env)-specific monoclonal antibodies (mAbs). Results The identified HIV-1 Env-specific colostrum mAbs, CH07 and CH08, represent two of the first mucosally-derived anti-HIV antibodies yet to be reported. Colostrum mAb CH07 is a highly-autoreactive, weakly-neutralizing gp140-specific mAb that binds to linear epitopes in the gp120 C5 region and gp41 fusion domain. In contrast, colostrum mAb CH08 is a nonpolyreactive CD4-inducible (CD4i) gp120-specific mAb with moderate breadth of neutralization. Conclusions These novel HIV-neutralizing mAbs isolated from a mucosal compartment provide insight into the ability of mucosal B cell populations to produce functional anti-HIV antibodies that may contribute to protection against virus acquisition at mucosal surfaces.
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Affiliation(s)
- James Friedman
- Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States
| | - S. Munir Alam
- Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States
| | - Xiaoying Shen
- Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States
| | - Shi-Mao Xia
- Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States
| | - Shelley Stewart
- Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States
| | - Kara Anasti
- Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States
| | - Justin Pollara
- Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States
| | - Genevieve G. Fouda
- Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States
| | - Guang Yang
- Department of Immunology, Duke University Medical Center, Durham, North Carolina, United States
| | - Garnett Kelsoe
- Department of Immunology, Duke University Medical Center, Durham, North Carolina, United States
| | - Guido Ferrari
- Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States
| | - Georgia D. Tomaras
- Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States
| | - Barton F. Haynes
- Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States
| | - Hua-Xin Liao
- Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States
| | - M. Anthony Moody
- Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States
| | - Sallie R. Permar
- Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States
- * E-mail:
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Rollman E, Mathy N, Bråve A, Boberg A, Kjerrström A, van Wely C, Engström G, Johansson S, Aperia K, Eriksson LE, Benthin R, Ertl P, Heeney J, Hinkula J, Voss G, Wahren B. Evaluation of immunogenicity and efficacy of combined DNA and adjuvanted protein vaccination in a human immunodeficiency virus type 1/murine leukemia virus pseudotype challenge model. Vaccine 2006; 25:2145-54. [PMID: 17254672 DOI: 10.1016/j.vaccine.2006.10.057] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2006] [Revised: 10/17/2006] [Accepted: 10/31/2006] [Indexed: 12/01/2022]
Abstract
A DNA plasmid encoding human immunodeficiency virus type 1 (HIV-1) env, nef and tat genes was used in mice in a prime-boost immunization regimen with the corresponding recombinant proteins. The genetic immunogen was delivered with a gene gun and the proteins were injected intramuscularly together with the adjuvant AS02A. Immunizations were followed by experimental challenge with pseudotyped HIV-1 subtype A or B virus. In an initial experiment in which animals were challenged four weeks after the final immunization, all single modality and prime-boost vaccinations resulted in a significant level of protection as compared to control animals. There was a trend for DNA-alone immunization yielding the highest protection. In a subsequent study, a late challenge was performed 19 weeks after the final immunization. All groups having received the DNA vaccine, either alone or in combination with adjuvanted protein, exhibited strong protection against HIV replication. The subtype-specific protection against the experimental HIV challenge was significantly stronger than the cross-protection. Cellular and humoral immune responses were assessed during immunization and after challenge, but without clear correlation to protection against HIV replication. The data suggest that either DNA or protein antigens alone provide partial protection against an HIV-1/MuLV challenge and that DNA immunization is essential for achieving very high levels of efficacy in this murine HIV-1 challenge model. While prime-boost combinations were more immunogenic than DNA alone, they did not appear to provide any further enhancement over DNA vaccine mediated efficacy. The DNA immunogen might prime low levels of CD8+ T cells responsible for virus clearance or possibly a yet unidentified mechanism of protection.
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Affiliation(s)
- Erik Rollman
- Swedish Institute for Infectious Disease Control, Karolinska Institutet, Stockholm, Stockholm, Sweden
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Cham F, Zhang PF, Heyndrickx L, Bouma P, Zhong P, Katinger H, Robinson J, van der Groen G, Quinnan GV. Neutralization and infectivity characteristics of envelope glycoproteins from human immunodeficiency virus type 1 infected donors whose sera exhibit broadly cross-reactive neutralizing activity. Virology 2005; 347:36-51. [PMID: 16378633 DOI: 10.1016/j.virol.2005.11.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2005] [Revised: 10/12/2005] [Accepted: 11/08/2005] [Indexed: 11/30/2022]
Abstract
In this study, we tested the hypothesis that donors with broadly cross-reactive HIV-1 neutralizing (BCN) sera are infected with viruses encoding envelope glycoproteins (Envs) with unusual immunogenic properties. Cloned env genes were from samples of donors previously identified as having BCN antibodies (BCN donors) and from other donors not known to have such antibodies (non-BCN donors). Neutralization properties of viruses pseudotyped with BCN and non-BCN Envs were determined using BCN, non-BCN sera and broadly cross-neutralizing monoclonal antibodies (Mabs). BCN sera neutralized with higher frequency and geometric mean titers than non-BCN sera. Viruses pseudotyped with BCN Envs were mostly resistant to neutralization by anti-gp120 Mabs but tended to be more sensitive to the anti-gp41 Mabs, 2F5 and 4E10 than non-BCN Env-pseudotyped viruses. Sequence analysis of clones obtained from sequential samples of two BCN donors revealed respective 2F5 epitope mutations T662A and K665T. The K665T mutation evolved as the predominant genotype in the respective donor, consistent with an escape mutation event. The A662T mutation reduced sensitivity to 4E10, as well as 2F5 and homologous sera, consistent with neutralization escape mutation and targeting of the 2F5 epitope region by the serum. Our study suggests that viruses infecting these BCN donors encoded Envs that may have been unusually competent for induction of antibodies against the membrane proximal epitope region (MPER) of gp41, and these Envs may be useful vaccine components.
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Affiliation(s)
- Fatim Cham
- Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA.
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Binley JM, Wrin T, Korber B, Zwick MB, Wang M, Chappey C, Stiegler G, Kunert R, Zolla-Pazner S, Katinger H, Petropoulos CJ, Burton DR. Comprehensive cross-clade neutralization analysis of a panel of anti-human immunodeficiency virus type 1 monoclonal antibodies. J Virol 2004; 78:13232-52. [PMID: 15542675 PMCID: PMC524984 DOI: 10.1128/jvi.78.23.13232-13252.2004] [Citation(s) in RCA: 585] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2004] [Accepted: 07/09/2004] [Indexed: 12/20/2022] Open
Abstract
Broadly neutralizing monoclonal antibodies (MAbs) are potentially important tools in human immunodeficiency virus type 1 (HIV-1) vaccine design. A few rare MAbs have been intensively studied, but we still have a limited appreciation of their neutralization breadth. Using a pseudovirus assay, we evaluated MAbs from clade B-infected donors and a clade B HIV(+) plasma against 93 viruses from diverse backgrounds. Anti-gp120 MAbs exhibited greater activity against clade B than non-B viruses, whereas anti-gp41 MAbs exhibited broad interclade activity. Unexpectedly, MAb 4E10 (directed against the C terminus of the gp41 ectodomain) neutralized all 90 viruses with moderate potency. MAb 2F5 (directed against an epitope adjacent to that of 4E10) neutralized 67% of isolates, but none from clade C. Anti-gp120 MAb b12 (directed against an epitope overlapping the CD4 binding site) neutralized 50% of viruses, including some from almost every clade. 2G12 (directed against a high-mannose epitope on gp120) neutralized 41% of the viruses, but none from clades C or E. MAbs to the gp120 V3 loop, including 447-52D, neutralized a subset of clade B viruses (up to 45%) but infrequently neutralized other clades (=7%). MAbs b6 (directed against the CD4 binding site) and X5 (directed against a CD4-induced epitope of gp120) neutralized only sensitive primary clade B viruses. The HIV(+) plasma neutralized 70% of the viruses, including some from all major clades. Further analysis revealed five neutralizing immunotypes that were somewhat associated with clades. As well as the significance for vaccine design, our data have implications for passive-immunization studies in countries where clade C viruses are common, given that only MAbs b12 and 4E10 were effective against viruses from this clade.
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Affiliation(s)
- James M Binley
- IMM2, Department of Immunology, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, CA 92037, USA
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