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Kenny A, van Duijn J, Dintwe O, Heptinstall J, Burnham R, Sawant S, Zhang L, Mielke D, Khuzwayo S, Omar FL, Stanfield-Oakley S, Keyes T, Dunn B, Goodman D, Fong Y, Benkeser D, Zou R, Hural J, Hyrien O, Juraska M, Luedtke A, van der Laan L, Giorgi EE, Magaret C, Carpp LN, Pattacini L, van de Kerkhof T, Korber B, Willems W, Fisher LH, Schuitemaker H, Swann E, Kublin JG, Pau MG, Buchbinder S, Tomaka F, Nijs S, Lavreys L, Gelderblom HC, Corey L, Mngadi K, Gray GE, Borducchi E, Hendriks J, Seaton KE, Zolla-Pazner S, Barouch DH, Ferrari G, De Rosa SC, McElrath MJ, Andersen-Nissen E, Stieh DJ, Tomaras GD, Gilbert PB. Immune correlates analysis of the Imbokodo (HVTN 705/HPX2008) efficacy trial of a mosaic HIV-1 vaccine regimen evaluated in Southern African people assigned female sex at birth: a two-phase case-control study. EBioMedicine 2024; 108:105320. [PMID: 39236556 PMCID: PMC11404224 DOI: 10.1016/j.ebiom.2024.105320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 08/09/2024] [Accepted: 08/17/2024] [Indexed: 09/07/2024] Open
Abstract
BACKGROUND The HVTN 705 Imbokodo trial of 2636 people without HIV and assigned female sex at birth, conducted in southern Africa, evaluated a heterologous HIV-1 vaccine regimen: mosaic adenovirus 26-based vaccine (Ad26.Mos4.HIV) at Months 0, 3, 6, 12 and alum-adjuvanted clade C gp140 at Months 6, 12. Per-protocol vaccine efficacy (VE) against HIV-1 diagnosis from seven to 24 months was 14.1% (95% CI: -22.0% to 39.5%). Immune correlates analysis was performed for markers selected based on prior evidence in efficacy trials and/or nonhuman primate models. METHODS Humoral and cellular immune response markers at Month 7 were evaluated as immune correlates of risk and of protection in a breakthrough case-control cohort (n = 52 cases, 246 non-cases). Primary markers were IgG binding to vaccine-strain gp140, IgG3 binding to diverse Env antigens (IgG3 Env breadth), IgG3 binding to diverse V1V2 antigens (IgG3 V1V2 breadth), antibody-dependent phagocytosis against the vaccine-strain gp140, Env-specific CD4+ and CD8+ T-cell responses, and multi-epitope functions. FINDINGS No immune markers were statistically significant correlates of risk. IgG3 V1V2 breadth trended toward an inverse association: hazard ratio 0.70 (95% CI: 0.36 to 1.35; p = 0.29) per 10-fold increase and 0.51 (95% CI: 0.21 to 1.24; p = 0.14) in a Cox model with all primary markers. The VE estimate was 11.8% (95% CI: -17.9% to 34.0%) at all IgG3 V1V2 breadth values below 667 weighted geometric mean net MFI; just above this value, the VE estimate sharply increased to 62.6% (95% CI: -17.9% to 89.6%), and further increased to 80.9% (95% CI: -17.9% to 99.5%) at 1471 MFI, the 95th percentile of the marker distribution. Mediation analysis yielded a VE of 35.7% (95% CI: 15.0% to 51.3%) attributable to the vaccine's impact on this marker. INTERPRETATION The trend in association of greater IgG3 V1V2 antibody breadth with lower likelihood of HIV acquisition is consistent with the identification of antibodies against V1V2 as immune correlates in three other HIV vaccine efficacy trials and suggests that a greater emphasis should be placed on studying this region in the HIV-1 envelope as a vaccine immunogen. FUNDING National Institute of Allergy and Infectious Diseases and Janssen Vaccines & Prevention BV.
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Affiliation(s)
- Avi Kenny
- Department of Biostatistics, University of Washington, Seattle, WA, USA
| | | | - One Dintwe
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA; Cape Town HVTN Immunology Laboratory, Hutchinson Centre Research Institute of South Africa, Cape Town, South Africa
| | - Jack Heptinstall
- Center for Human Systems Immunology, Department of Surgery, Duke University, Durham, NC, USA; Duke Human Vaccine Institute, Durham, NC, USA
| | - Randy Burnham
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Sheetal Sawant
- Center for Human Systems Immunology, Department of Surgery, Duke University, Durham, NC, USA; Duke Human Vaccine Institute, Durham, NC, USA
| | - Lu Zhang
- Center for Human Systems Immunology, Department of Surgery, Duke University, Durham, NC, USA; Duke Human Vaccine Institute, Durham, NC, USA
| | - Dieter Mielke
- Center for Human Systems Immunology, Department of Surgery, Duke University, Durham, NC, USA
| | - Sharon Khuzwayo
- Cape Town HVTN Immunology Laboratory, Hutchinson Centre Research Institute of South Africa, Cape Town, South Africa
| | - Faatima Laher Omar
- Cape Town HVTN Immunology Laboratory, Hutchinson Centre Research Institute of South Africa, Cape Town, South Africa
| | - Sherry Stanfield-Oakley
- Center for Human Systems Immunology, Department of Surgery, Duke University, Durham, NC, USA
| | - Taylor Keyes
- Center for Human Systems Immunology, Department of Surgery, Duke University, Durham, NC, USA
| | - Brooke Dunn
- Center for Human Systems Immunology, Department of Surgery, Duke University, Durham, NC, USA
| | - Derrick Goodman
- Center for Human Systems Immunology, Department of Surgery, Duke University, Durham, NC, USA; Duke Human Vaccine Institute, Durham, NC, USA
| | - Youyi Fong
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA; Public Health Sciences Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - David Benkeser
- Department of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta, GA, USA
| | - Rodger Zou
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - John Hural
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Ollivier Hyrien
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Michal Juraska
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Alex Luedtke
- Department of Statistics, University of Washington, Seattle, WA, USA
| | - Lars van der Laan
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA; Department of Statistics, University of Washington, Seattle, WA, USA
| | - Elena E Giorgi
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Craig Magaret
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Lindsay N Carpp
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | | | | | - Bette Korber
- Los Alamos National Laboratory, Los Alamos, NM, USA; New Mexico Consortium, Los Alamos, NM, USA
| | | | - Leigh H Fisher
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | | | - Edith Swann
- Division of AIDS, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - James G Kublin
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Maria G Pau
- Janssen Infectious Diseases BV, Beerse, Belgium
| | - Susan Buchbinder
- San Francisco Department of Public Health, San Francisco, CA, USA
| | - Frank Tomaka
- Janssen Research & Development, LLC, Titusville, NJ, USA
| | - Steven Nijs
- Janssen Infectious Diseases BV, Beerse, Belgium
| | | | - Huub C Gelderblom
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Lawrence Corey
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA; Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA; Department of Medicine, University of Washington, Seattle, WA, 98195, USA
| | | | - Glenda E Gray
- South African Medical Research Council, Cape Town, South Africa
| | - Erica Borducchi
- Center for Virology & Vaccine Research, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Jenny Hendriks
- Janssen Vaccines & Prevention BV, Leiden, the Netherlands
| | - Kelly E Seaton
- Center for Human Systems Immunology, Department of Surgery, Duke University, Durham, NC, USA; Duke Human Vaccine Institute, Durham, NC, USA
| | | | - Dan H Barouch
- Center for Virology & Vaccine Research, Beth Israel Deaconess Medical Center, Boston, MA, USA; Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology, and Harvard, Cambridge, MA, USA
| | - Guido Ferrari
- Center for Human Systems Immunology, Department of Surgery, Duke University, Durham, NC, USA; Duke Human Vaccine Institute, Durham, NC, USA
| | - Stephen C De Rosa
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - M Juliana McElrath
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA; Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
| | - Erica Andersen-Nissen
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA; Cape Town HVTN Immunology Laboratory, Hutchinson Centre Research Institute of South Africa, Cape Town, South Africa
| | - Daniel J Stieh
- Janssen Vaccines & Prevention BV, Leiden, the Netherlands
| | - Georgia D Tomaras
- Center for Human Systems Immunology, Department of Surgery, Duke University, Durham, NC, USA; Duke Human Vaccine Institute, Durham, NC, USA; Department of Integrative Immunobiology, Duke University, Durham, NC, USA.
| | - Peter B Gilbert
- Department of Biostatistics, University of Washington, Seattle, WA, USA; Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA; Public Health Sciences Division, Fred Hutchinson Cancer Center, Seattle, WA, USA.
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2
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Hioe CE, Liu X, Banin AN, Heindel DW, Klingler J, Rao PG, Luo CC, Jiang X, Pandey S, Ordonez T, Barnette P, Totrov M, Zhu J, Nádas A, Zolla-Pazner S, Upadhyay C, Shen X, Kong XP, Hessell AJ. Vaccination with immune complexes modulates the elicitation of functional antibodies against HIV-1. Front Immunol 2023; 14:1271686. [PMID: 37854587 PMCID: PMC10579950 DOI: 10.3389/fimmu.2023.1271686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 09/05/2023] [Indexed: 10/20/2023] Open
Abstract
Introduction Neutralizing antibodies (Abs) are one of the immune components required to protect against viral infections. However, developing vaccines capable of eliciting neutralizing Abs effective against a broad array of HIV-1 isolates has been an arduous challenge. Objective This study sought to test vaccines aimed to induce Abs against neutralizing epitopes at the V1V2 apex of HIV-1 envelope (Env). Methods Four groups of rabbits received a DNA vaccine expressing the V1V2 domain of the CRF01_AE A244 strain on a trimeric 2J9C scaffold (V1V2-2J9C) along with a protein vaccine consisting of an uncleaved prefusion-optimized A244 Env trimer with V3 truncation (UFO-BG.ΔV3) or a V1V2-2J9C protein and their respective immune complexes (ICs). These IC vaccines were made using 2158, a V1V2-specific monoclonal Ab (mAb), which binds the V2i epitope in the underbelly region of V1V2 while allosterically promoting the binding of broadly neutralizing mAb PG9 to its V2 apex epitope in vitro. Results Rabbit groups immunized with the DNA vaccine and uncomplexed or complexed UFO-BG.ΔV3 proteins (DNA/UFO-UC or IC) displayed similar profiles of Env- and V1V2-binding Abs but differed from the rabbits receiving the DNA vaccine and uncomplexed or complexed V1V2-2J9C proteins (DNA/V1V2-UC or IC), which generated more cross-reactive V1V2 Abs without detectable binding to gp120 or gp140 Env. Notably, the DNA/UFO-UC vaccine elicited neutralizing Abs against some heterologous tier 1 and tier 2 viruses from different clades, albeit at low titers and only in a fraction of animals, whereas the DNA/V1V2-UC or IC vaccines did not. In comparison with the DNA/UFO-UC group, the DNA/UFO-IC group showed a trend of higher neutralization against TH023.6 and a greater potency of V1V2-specific Ab-dependent cellular phagocytosis (ADCP) but failed to neutralize heterologous viruses. Conclusion These data demonstrate the capacity of V1V2-2J9C-encoding DNA vaccine in combination with UFO-BG.ΔV3, but not V1V2-2J9C, protein vaccines, to elicit homologous and heterologous neutralizing activities in rabbits. The elicitation of neutralizing and ADCP activities was modulated by delivery of UFO-BG.ΔV3 complexed with V2i mAb 2158.
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Affiliation(s)
- Catarina E. Hioe
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States
- Research Service, James J. Peters VA Medical Center, Bronx, NY, United States
| | - Xiaomei Liu
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Andrew N. Banin
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Daniel W. Heindel
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Jéromine Klingler
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Priyanka G. Rao
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Christina C. Luo
- Department of Biochemistry and Molecular Pharmacology, New York University Grossman School of Medicine, New York, NY, United States
| | - Xunqing Jiang
- Department of Biochemistry and Molecular Pharmacology, New York University Grossman School of Medicine, New York, NY, United States
| | - Shilpi Pandey
- Division of Pathobiology and Immunology, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR, United States
| | - Tracy Ordonez
- Division of Pathobiology and Immunology, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR, United States
| | - Philip Barnette
- Division of Pathobiology and Immunology, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR, United States
| | | | - Jiang Zhu
- Department of Integrative Structural and Computational Biology and Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, United States
| | - Arthur Nádas
- Department of Environment Medicine, New York University Grossman School of Medicine, New York, NY, United States
| | - Susan Zolla-Pazner
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Chitra Upadhyay
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Xiaoying Shen
- Division of Surgical Sciences, Department of Surgery, Duke University School of Medicine, Durham, NC, United States
| | - Xiang-Peng Kong
- Department of Biochemistry and Molecular Pharmacology, New York University Grossman School of Medicine, New York, NY, United States
| | - Ann J. Hessell
- Division of Pathobiology and Immunology, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR, United States
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Weiss S, Itri V, Pan R, Jiang X, Luo CC, Morris L, Malherbe DC, Barnette P, Alexander J, Kong XP, Haigwood NL, Hessell AJ, Duerr R, Zolla-Pazner S. Differential V2-directed antibody responses in non-human primates infected with SHIVs or immunized with diverse HIV vaccines. Nat Commun 2022; 13:903. [PMID: 35173151 PMCID: PMC8850611 DOI: 10.1038/s41467-022-28450-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 01/25/2022] [Indexed: 11/24/2022] Open
Abstract
V2p and V2i antibodies (Abs) that are specific for epitopes in the V1V2 region of the HIV gp120 envelope (Env) do not effectively neutralize HIV but mediate Fc-dependent anti-viral activities that have been correlated with protection from, or control of HIV, SIV and SHIV infections. Here, we describe a novel molecular toolbox that allows the discrimination of antigenically and functionally distinct polyclonal V2 Ab responses. We identify different patterns of V2 Ab induction by SHIV infection and three separate vaccine regimens that aid in fine-tuning an optimized immunization protocol for inducing V2p and V2i Abs. We observe no, or weak and sporadic V2p and V2i Abs in non-vaccinated SHIV-infected NHPs, but strong V2p and/or V2i Ab responses after immunization with a V2-targeting vaccine protocol. The V2-focused vaccination is superior to both natural infection and to immunization with whole Env constructs for inducing functional V2p- and V2i-specific responses. Strikingly, levels of V2-directed Abs correlate inversely with Abs specific for peptides of V3 and C5. These data demonstrate that a V1V2-targeting vaccine has advantages over the imprecise targeting of SIV/SHIV infections and of whole Env-based immunization regimens for inducing a more focused functional V2p- and V2i-specific Ab response. Here the authors show that an HIV vaccine in non-human primates that focuses antibodies on the V1V2 region of gp120 is superior to infection or immunization with whole envelope vaccines for inducing V1V2 antibodies with anti-viral functions that correlate with protection.
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Affiliation(s)
- Svenja Weiss
- Department of Medicine, Division of Infectious Diseases, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Vincenza Itri
- Department of Medicine, Division of Infectious Diseases, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Ruimin Pan
- Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, NY, USA
| | - Xunqing Jiang
- Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, NY, USA
| | - Christina C Luo
- Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, NY, USA
| | - Lynn Morris
- National Institute for Communicable Diseases, National Health Laboratory Service, Sandringham, Johannesburg, South Africa.,MRC Antibody Research Unit, University of the Witwatersrand, Johannesburg and Center for the AIDS Program of Research in South Africa, Johannesburg, South Africa
| | - Delphine C Malherbe
- Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR, USA.,University of Texas Medical Branch, Department of Pathology, Galveston National Laboratory, Galveston, TX, USA
| | - Philip Barnette
- Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR, USA
| | - Jeff Alexander
- PaxVax Corporation, Redwood City, CA, USA.,JL Alexander Research and Development Consulting LLC, San Diego, CA, USA
| | - Xiang-Peng Kong
- Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, NY, USA
| | - Nancy L Haigwood
- Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR, USA
| | - Ann J Hessell
- Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR, USA
| | - Ralf Duerr
- Department of Microbiology, New York University School of Medicine, New York, NY, USA
| | - Susan Zolla-Pazner
- Department of Medicine, Division of Infectious Diseases, Icahn School of Medicine at Mount Sinai, New York, NY, USA. .,Department of Microbiology, Icahn School of Medicine, New York, NY, USA.
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4
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Rosati M, Agarwal M, Hu X, Devasundaram S, Stellas D, Chowdhury B, Bear J, Burns R, Donohue D, Pessaint L, Andersen H, Lewis MG, Terpos E, Dimopoulos MA, Wlodawer A, Mullins JI, Venzon DJ, Pavlakis GN, Felber BK. Control of SARS-CoV-2 infection after Spike DNA or Spike DNA+Protein co-immunization in rhesus macaques. PLoS Pathog 2021; 17:e1009701. [PMID: 34551020 PMCID: PMC8489704 DOI: 10.1371/journal.ppat.1009701] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 10/04/2021] [Accepted: 09/07/2021] [Indexed: 12/28/2022] Open
Abstract
The speed of development, versatility and efficacy of mRNA-based vaccines have been amply demonstrated in the case of SARS-CoV-2. DNA vaccines represent an important alternative since they induce both humoral and cellular immune responses in animal models and in human trials. We tested the immunogenicity and protective efficacy of DNA-based vaccine regimens expressing different prefusion-stabilized Wuhan-Hu-1 SARS-CoV-2 Spike antigens upon intramuscular injection followed by electroporation in rhesus macaques. Different Spike DNA vaccine regimens induced antibodies that potently neutralized SARS-CoV-2 in vitro and elicited robust T cell responses. The antibodies recognized and potently neutralized a panel of different Spike variants including Alpha, Delta, Epsilon, Eta and A.23.1, but to a lesser extent Beta and Gamma. The DNA-only vaccine regimens were compared to a regimen that included co-immunization of Spike DNA and protein in the same anatomical site, the latter of which showed significant higher antibody responses. All vaccine regimens led to control of SARS-CoV-2 intranasal/intratracheal challenge and absence of virus dissemination to the lower respiratory tract. Vaccine-induced binding and neutralizing antibody titers and antibody-dependent cellular phagocytosis inversely correlated with transient virus levels in the nasal mucosa. Importantly, the Spike DNA+Protein co-immunization regimen induced the highest binding and neutralizing antibodies and showed the strongest control against SARS-CoV-2 challenge in rhesus macaques. Anti-Spike neutralizing antibodies provide strong protection against SARS-CoV-2 infection in animal models, and correlate with protection in humans, supporting the notion that induction of strong humoral immunity is key to protection. We show induction of robust antibody and T cell responses by different Spike DNA-based vaccine regimens able to effectively mediate protection and to control SARS-CoV-2 infection in the rhesus macaque model. This study provides the opportunity to compare vaccines able to induce different humoral and cellular immune responses in an effort to develop durable immunity against the SARS-CoV-2. A vaccine regimen comprising simultaneous co-immunization of DNA and Protein at the same anatomical site showed best neutralizing abilities and was more effective than DNA alone in inducing protective immune responses and controlling SARS-CoV-2 infection. Thus, an expansion of the DNA vaccine regimen to include co-immunization with Spike protein may be of advantage also for SARS-CoV-2.
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Affiliation(s)
- Margherita Rosati
- Human Retrovirus Section, Vaccine Branch, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, Maryland, United States of America
| | - Mahesh Agarwal
- Human Retrovirus Pathogenesis Section, Vaccine Branch, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, Maryland, United States of America
| | - Xintao Hu
- Human Retrovirus Pathogenesis Section, Vaccine Branch, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, Maryland, United States of America
| | - Santhi Devasundaram
- Human Retrovirus Pathogenesis Section, Vaccine Branch, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, Maryland, United States of America
| | - Dimitris Stellas
- Human Retrovirus Section, Vaccine Branch, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, Maryland, United States of America
| | - Bhabadeb Chowdhury
- Human Retrovirus Section, Vaccine Branch, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, Maryland, United States of America
| | - Jenifer Bear
- Human Retrovirus Pathogenesis Section, Vaccine Branch, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, Maryland, United States of America
| | - Robert Burns
- Human Retrovirus Pathogenesis Section, Vaccine Branch, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, Maryland, United States of America
| | - Duncan Donohue
- MS Applied Information and Management Sciences, Frederick National Laboratory for Cancer Research, Frederick, Maryland, United States of America
| | | | - Hanne Andersen
- BIOQUAL, Inc.; Rockville, Maryland, United States of America
| | - Mark G. Lewis
- BIOQUAL, Inc.; Rockville, Maryland, United States of America
| | - Evangelos Terpos
- Department of Clinical Therapeutics, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
| | | | - Alexander Wlodawer
- Center for Structural Biology, National Cancer Institute, Frederick, Maryland, United States of America
| | - James I. Mullins
- Department of Microbiology, University of Washington, Seattle, Washington, United States of America
- Department of Medicine, University of Washington, Seattle, Washington, United States of America
- Department of Global Health, University of Washington, Seattle, Washington, United States of America
| | - David J. Venzon
- Biostatistics and Data Management Section, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - George N. Pavlakis
- Human Retrovirus Section, Vaccine Branch, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, Maryland, United States of America
| | - Barbara K. Felber
- Human Retrovirus Pathogenesis Section, Vaccine Branch, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, Maryland, United States of America
- * E-mail:
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